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git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5329 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2012-11-10 16:06:01 +00:00
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commit a09a1f220c
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275
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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
config STDIO_BUFFER_SIZE
int "C STDIO buffer size"
default 64
---help---
Size of buffers using within the C buffered I/O interfaces.
(printf, putchar, fwrite, etc.).
config STDIO_LINEBUFFER
bool "STDIO line buffering"
default y
---help---
Flush buffer I/O whenever a newline character is found in
the output data stream.
config NUNGET_CHARS
int "Number unget() characters"
default 2
---help---
Number of characters that can be buffered by ungetc() (Only if NFILE_STREAMS > 0)
config LIB_HOMEDIR
string "Home directory"
default "/"
depends on !DISABLE_ENVIRON
---help---
The home directory to use with operations like such as 'cd ~'
source lib/math/Kconfig
config NOPRINTF_FIELDWIDTH
bool "Disable sprintf support fieldwidth"
default n
---help---
sprintf-related logic is a
little smaller if we do not support fieldwidthes
config LIBC_FLOATINGPOINT
bool "Enable floating point in printf"
default n
---help---
By default, floating point
support in printf, sscanf, etc. is disabled.
choice
prompt "Newline Options"
default EOL_IS_EITHER_CRLF
---help---
This selection determines the line terminating character that is used.
Some environments may return CR as end-of-line, others LF, and others
both. If not specified, the default is either CR or LF (but not both)
as the line terminating charactor.
config EOL_IS_CR
bool "EOL is CR"
config EOL_IS_LF
bool "EOL is LF"
config EOL_IS_BOTH_CRLF
bool "EOL is CR and LF"
config EOL_IS_EITHER_CRLF
bool "EOL is CR or LF"
endchoice
config LIBC_STRERROR
bool "Enable strerror"
default n
---help---
strerror() is useful because it decodes 'errno' values into a human readable
strings. But it can also require a lot of memory. If this option is selected,
strerror() will still exist in the build but it will not decode error values.
This option should be used by other logic to decide if it should use strerror()
or not. For example, the NSH application will not use strerror() if this
option is not selected; perror() will not use strerror() is this option is not
selected (see also NSH_STRERROR).
config LIBC_STRERROR_SHORT
bool "Use short error descriptions in strerror()"
default n
depends on LIBC_STRERROR
---help---
If this option is selected, then strerror() will use a shortened string when
it decodes the error. Specifically, strerror() is simply use the string that
is the common name for the error. For example, the 'errno' value of 2 will
produce the string "No such file or directory" is LIBC_STRERROR_SHORT
is not defined but the string "ENOENT" is LIBC_STRERROR_SHORT is defined.
config LIBC_PERROR_STDOUT
bool "perror() to stdout"
default n
---help---
POSIX requires that perror() provide its output on stderr. This option may
be defined, however, to provide perror() output that is serialized with
other stdout messages.
config ARCH_LOWPUTC
bool "Low-level console output"
default "y"
---help---
architecture supports low-level, boot time console output
config LIB_SENDFILE_BUFSIZE
int "sendfile() buffer size"
default 512
---help---
Size of the I/O buffer to allocate in sendfile(). Default: 512b
config ARCH_ROMGETC
bool "Support for ROM string access"
default n
---help---
In Harvard architectures, data accesses and instruction accesses
occur on different busses, perhaps concurrently. All data accesses
are performed on the data bus unless special machine instructions
are used to read data from the instruction address space. Also, in
the typical MCU, the available SRAM data memory is much smaller that
the non-volatile FLASH instruction memory. So if the application
requires many constant strings, the only practical solution may be
to store those constant strings in FLASH memory where they can only
be accessed using architecture-specific machine instructions.
If ARCH_ROMGETC is defined, then the architecture logic must export
the function up_romgetc(). up_romgetc() will simply read one byte
of data from the instruction space.
If ARCH_ROMGETC, certain C stdio functions are effected: (1) All
format strings in printf, fprintf, sprintf, etc. are assumed to lie
in FLASH (string arguments for %s are still assumed to reside in SRAM).
And (2), the string argument to puts and fputs is assumed to reside
in FLASH. Clearly, these assumptions may have to modified for the
particular needs of your environment. There is no "one-size-fits-all"
solution for this problem.
config ARCH_OPTIMIZED_FUNCTIONS
bool "Enable arch optimized functions"
default n
---help---
Allow for architecture optimized implementations of certain library
functions. Architecture-specific implementations can improve overall
system performance.
if ARCH_OPTIMIZED_FUNCTIONS
config ARCH_MEMCPY
bool "memcpy()"
default n
---help---
Select this option if the architecture provides an optimized version
of memcpy().
config MEMCPY_VIK
bool "Vik memcpy()"
default n
depends on !ARCH_MEMCPY
---help---
Select this option to use the optimized memcpy() function by Daniel Vik.
Select this option for improved performance at the expense of increased
size. See licensing information in the top-level COPYING file.
if MEMCPY_VIK
config MEMCPY_PRE_INC_PTRS
bool "Pre-increment pointers"
default n
---help---
Use pre-increment of pointers. Default is post increment of pointers.
config MEMCPY_INDEXED_COPY
bool "Array indexing"
default y
---help---
Copying data using array indexing. Using this option, disables the
MEMCPY_PRE_INC_PTRS option.
config MEMCPY_64BIT
bool "64-bit memcpy()"
default n
---help---
Compiles memcpy() for architectures that suppport 64-bit operations
efficiently.
endif
config ARCH_MEMCMP
bool "memcmp()"
default n
---help---
Select this option if the architecture provides an optimized version
of memcmp().
config ARCH_MEMMOVE
bool "memmove()"
default n
---help---
Select this option if the architecture provides an optimized version
of memmove().
config ARCH_MEMSET
bool "memset()"
default n
---help---
Select this option if the architecture provides an optimized version
of memset().
config MEMSET_OPTSPEED
bool "Optimize memset() for speed"
default n
depends on !ARCH_MEMSET
---help---
Select this option to use a version of memcpy() optimized for speed.
Default: memcpy() is optimized for size.
config MEMSET_64BIT
bool "64-bit memset()"
default n
depends on MEMSET_OPTSPEED
---help---
Compiles memset() for architectures that suppport 64-bit operations
efficiently.
config ARCH_STRCHR
bool "strchr()"
default n
---help---
Select this option if the architecture provides an optimized version
of strchr().
config ARCH_STRCMP
bool "strcmp()"
default n
---help---
Select this option if the architecture provides an optimized version
of strcmp().
config ARCH_STRCPY
bool "strcpy()"
default n
---help---
Select this option if the architecture provides an optimized version
of strcpy().
config ARCH_STRNCPY
bool "strncpy()"
default n
---help---
Select this option if the architecture provides an optimized version
of strncpy().
config ARCH_STRLEN
bool "strlen"
default n
---help---
Select this option if the architecture provides an optimized version
of strlen().
config ARCH_STRNLEN
bool "strlen()"
default n
---help---
Select this option if the architecture provides an optimized version
of strnlen().
config ARCH_BZERO
bool "bzero()"
default n
---help---
Select this option if the architecture provides an optimized version
of bzero().
endif

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############################################################################
# lib/Makefile
#
# Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
###########################################################################
-include $(TOPDIR)/Make.defs
ASRCS =
CSRCS =
DEPPATH := --dep-path .
VPATH := .
include stdio/Make.defs
include stdlib/Make.defs
include unistd/Make.defs
include sched/Make.defs
include string/Make.defs
include pthread/Make.defs
include semaphore/Make.defs
include signal/Make.defs
include mqueue/Make.defs
include math/Make.defs
include fixedmath/Make.defs
include net/Make.defs
include time/Make.defs
include libgen/Make.defs
include dirent/Make.defs
include termios/Make.defs
include queue/Make.defs
include misc/Make.defs
AOBJS = $(ASRCS:.S=$(OBJEXT))
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)
OBJS = $(AOBJS) $(COBJS)
UBIN = libulib$(LIBEXT)
KBIN = libklib$(LIBEXT)
BIN = liblib$(LIBEXT)
all: $(BIN)
$(AOBJS): %$(OBJEXT): %.S
$(call ASSEMBLE, $<, $@)
$(COBJS): %$(OBJEXT): %.c
$(call COMPILE, $<, $@)
$(BIN): $(OBJS)
@( for obj in $(OBJS) ; do \
$(call ARCHIVE, $@, $${obj}); \
done ; )
ifneq ($(BIN),$(UBIN))
.userlib:
@$(MAKE) $(UBIN) BIN=$(UBIN) TOPDIR=$(TOPDIR) EXTRADEFINES=$(EXTRADEFINES)
@touch .userlib
$(UBIN): kclean .userlib
endif
ifneq ($(BIN),$(KBIN))
.kernlib:
@$(MAKE) $(KBIN) BIN=$(KBIN) TOPDIR=$(TOPDIR) EXTRADEFINES=$(EXTRADEFINES)
@touch .kernlib
$(KBIN): uclean .kernlib
endif
.depend: Makefile $(SRCS)
@$(MKDEP) $(DEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
@touch $@
depend: .depend
# Clean Targets:
# Clean user-mode temporary files (retaining the UBIN binary)
uclean:
ifneq ($(OBJEXT),)
@( if [ -f .userlib ]; then rm -f *$(OBJEXT); fi )
endif
@rm -f .userlib *~ .*.swp
# Clean kernel-mode temporary files (retaining the KBIN binary)
kclean:
ifneq ($(OBJEXT),)
@( if [ -f .kernlib ]; then rm -f *$(OBJEXT); fi )
endif
@rm -f .kernlib *~ .*.swp
# Really clean everything
clean: uclean kclean
@rm -f $(BIN) $(UBIN) $(KBIN) *~ .*.swp
$(call CLEAN)
# Deep clean -- removes all traces of the configuration
distclean: clean
@rm -f Make.dep .depend
-include Make.dep

85
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lib
===
This directory contains numerous, small functions typically associated with
what you would expect to find in a standard C library. The sub-directories
in this directory contain standard interface that can be executed by user-
mode programs.
Normally, NuttX is built with no protection and all threads running in kerne-
mode. In that model, there is no real architectural distinction between
what is a kernel-mode program and what is a user-mode program; the system is
more like on multi-threaded program that all runs in kernel-mode.
But if the CONFIG_NUTTX_KERNEL option is selected, NuttX will be built into
distinct user-mode and kernel-mode sections. In that case, most of the
code in the nuttx/ directory will run in kernel-mode with with exceptions
of (1) the user-mode "proxies" found in syscall/proxies, and (2) the
standard C library functions found in this directory. In this build model,
it is critical to separate the user-mode OS interfaces in this way.
Sub-Directories
===============
The files in the lib/ directory are organized (mostly) according which file
in the include/ directory provides the prototype for library functions. So
we have:
libgen - libgen.h
fixedmath - fixedmath.h
math - math.h
mqueue - pthread.h
net - Various network-related header files: netinet/ether.h, arpa/inet.h
pthread - pthread.h
queue - queue.h
sched - sched.h
semaphore - semaphore.h
stdio - stdio.h
stdlib - stdlib.h
string - string.h
time - time.h
unistd - unistd.h
There is also a misc/ subdirectory that contains various internal functions
and interfaces from header files that are too few to warrant their own sub-
directory:
misc - Nonstandard "glue" logic, debug.h, crc32.h, dirent.h
Library Database
================
Information about functions available in the NuttX C library information is
maintained in a database. That "database" is implemented as a simple comma-
separated-value file, lib.csv. Most spreadsheets programs will accept this
format and can be used to maintain the library database.
This library database will (eventually) be used to generate symbol library
symbol table information that can be exported to external applications.
The format of the CSV file for each line is:
Field 1: Function name
Field 2: The header file that contains the function prototype
Field 3: Condition for compilation
Field 4: The type of function return value.
Field 5 - N+5: The type of each of the N formal parameters of the function
Each type field has a format as follows:
type name:
For all simpler types
formal type | actual type:
For array types where the form of the formal (eg. int parm[2])
differs from the type of actual passed parameter (eg. int*). This
is necessary because you cannot do simple casts to array types.
formal type | union member actual type | union member fieldname:
A similar situation exists for unions. For example, the formal
parameter type union sigval -- You cannot cast a uintptr_t to
a union sigval, but you can cast to the type of one of the union
member types when passing the actual paramter. Similarly, we
cannot cast a union sigval to a uinptr_t either. Rather, we need
to cast a specific union member fieldname to uintptr_t.
NOTE: The tool mksymtab can be used to generate a symbol table from this CSV
file. See nuttx/tools/README.txt for further details about the use of mksymtab.

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############################################################################
# lib/dirent/Make.defs
#
# Copyright (C) 2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
# Add the dirent C files to the build
CSRCS += lib_readdirr.c lib_telldir.c
# Add the dirent directory to the build
DEPPATH += --dep-path dirent
VPATH += :dirent
endif

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/****************************************************************************
* lib/dirent/lib_readdirr.c
*
* Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: readdir_r
*
* Description:
* The readdir() function returns a pointer to a dirent
* structure representing the next directory entry in the
* directory stream pointed to by dir. It returns NULL on
* reaching the end-of-file or if an error occurred.
*
* Inputs:
* dirp -- An instance of type DIR created by a previous
* call to opendir();
* entry -- The storage pointed to by entry must be large
* enough for a dirent with an array of char d_name
* members containing at least {NAME_MAX}+1 elements.
* result -- Upon successful return, the pointer returned
* at *result shall have the same value as the
* argument entry. Upon reaching the end of the directory
* stream, this pointer shall have the value NULL.
*
* Return:
* If successful, the readdir_r() function return s zero;
* otherwise, an error number is returned to indicate the
* error.
*
* EBADF - Invalid directory stream descriptor dir
*
****************************************************************************/
int readdir_r(FAR DIR *dirp, FAR struct dirent *entry,
FAR struct dirent **result)
{
struct dirent *tmp;
/* NOTE: The following use or errno is *not* thread-safe */
set_errno(0);
tmp = readdir(dirp);
if (!tmp)
{
int error = get_errno();
if (!error)
{
if (result)
{
*result = NULL;
}
return 0;
}
else
{
return error;
}
}
if (entry)
{
memcpy(entry, tmp, sizeof(struct dirent));
}
if (result)
{
*result = entry;
}
return 0;
}

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/****************************************************************************
* lib/dirent/fs_telldir.c
*
* Copyright (C) 2007-2008, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/dirent.h>
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: telldir
*
* Description:
* The telldir() function returns the current location
* associated with the directory stream dirp.
*
* Inputs:
* dirp -- An instance of type DIR created by a previous
* call to opendir();
*
* Return:
* On success, the telldir() function returns the current
* location in the directory stream. On error, -1 is
* returned, and errno is set appropriately.
*
* EBADF - Invalid directory stream descriptor dir
*
****************************************************************************/
off_t telldir(FAR DIR *dirp)
{
struct fs_dirent_s *idir = (struct fs_dirent_s *)dirp;
if (!idir || !idir->fd_root)
{
set_errno(EBADF);
return (off_t)-1;
}
/* Just return the current position */
return idir->fd_position;
}

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############################################################################
# lib/fixedmath/Make.defs
#
# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Add the fixed precision math C files to the build
CSRCS += lib_rint.c lib_fixedmath.c lib_b16sin.c lib_b16cos.c lib_b16atan2.c
# Add the fixed precision math directory to the build
DEPPATH += --dep-path fixedmath
VPATH += :fixedmath

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/****************************************************************************
* lib/fixedmath/lib_b16atan2.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <fixedmath.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define B16_C1 0x00000373 /* 0.013480470 */
#define B16_C2 0x00000eb7 /* 0.057477314 */
#define B16_C3 0x00001f0a /* 0.121239071 */
#define B16_C4 0x00003215 /* 0.195635925 */
#define B16_C5 0x0000553f /* 0.332994597 */
#define B16_C6 0x00010000 /* 0.999995630 */
#define B16_HALFPI 0x00019220 /* 1.570796327 */
#define B16_PI 0x00032440 /* 3.141592654 */
#ifndef MAX
# define MAX(a,b) (a > b ? a : b)
#endif
#ifndef MIN
# define MIN(a,b) (a < b ? a : b)
#endif
#ifndef ABS
# define ABS(a) (a < 0 ? -a : a)
#endif
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Name: b16atan2
*
* Description:
* atan2 calculates the arctangent of y/x. (Based on a algorithm I saw
* posted on the internet... now I have lost the link -- sorry).
*
****************************************************************************/
b16_t b16atan2(b16_t y, b16_t x)
{
b16_t t0;
b16_t t1;
b16_t t2;
b16_t t3;
t2 = ABS(x);
t1 = ABS(y);
t0 = MAX(t2, t1);
t1 = MIN(t2, t1);
t2 = ub16inv(t0);
t2 = b16mulb16(t1, t2);
t3 = b16mulb16(t2, t2);
t0 = - B16_C1;
t0 = b16mulb16(t0, t3) + B16_C2;
t0 = b16mulb16(t0, t3) - B16_C3;
t0 = b16mulb16(t0, t3) + B16_C4;
t0 = b16mulb16(t0, t3) - B16_C5;
t0 = b16mulb16(t0, t3) + B16_C6;
t2 = b16mulb16(t0, t2);
t2 = (ABS(y) > ABS(x)) ? B16_HALFPI - t2 : t2;
t2 = (x < 0) ? B16_PI - t2 : t2;
t2 = (y < 0) ? -t2 : t2;
return t2;
}

64
nuttx/lib/fixedmath/lib_b16cos.c Normal file
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/****************************************************************************
* lib/fixedmath/lib_b16cos.c
*
* Copyright (C) 2007, 2008, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <fixedmath.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Name: b16cos
****************************************************************************/
b16_t b16cos(b16_t rad)
{
/* Compute cosine: sin(rad + PI/2) = cos(rad) */
rad += b16HALFPI;
if (rad > b16PI)
{
rad -= b16TWOPI;
}
return b16sin(rad);
}

110
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/****************************************************************************
* lib/fixedmath/lib_b16sin.c
*
* Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <fixedmath.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define b16_P225 0x0000399a
#define b16_P405284735 0x000067c1
#define b16_1P27323954 0x000145f3
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Name: b16sin
* Ref: http://lab.polygonal.de/2007/07/18/fast-and-accurate-sinecosine-approximation/
****************************************************************************/
b16_t b16sin(b16_t rad)
{
b16_t tmp1;
b16_t tmp2;
b16_t tmp3;
/* Force angle into the good range */
if (rad < -b16PI)
{
rad += b16TWOPI;
}
else if (rad > b16PI)
{
rad -= b16TWOPI;
}
/* tmp1 = 1.27323954 * rad
* tmp2 = .405284735 * rad * rad
*/
tmp1 = b16mulb16(b16_1P27323954, rad);
tmp2 = b16mulb16(b16_P405284735, b16sqr(rad));
if (rad < 0)
{
/* tmp3 = 1.27323954 * rad + .405284735 * rad * rad */
tmp3 = tmp1 + tmp2;
}
else
{
/* tmp3 = 1.27323954 * rad - 0.405284735 * rad * rad */
tmp3 = tmp1 - tmp2;
}
/* tmp1 = tmp3*tmp3 */
tmp1 = b16sqr(tmp3);
if (tmp3 < 0)
{
/* tmp1 = tmp3 * -tmp3 */
tmp1 = -tmp1;
}
/* Return sin = .225 * (tmp3 * (+/-tmp3) - tmp3) + tmp3 */
return b16mulb16(b16_P225, (tmp1 - tmp3)) + tmp3;
}

272
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/****************************************************************************
* lib/math/lib_fixedmath.c
*
* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <fixedmath.h>
#ifndef CONFIG_HAVE_LONG_LONG
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Name: fixsign
****************************************************************************/
static void fixsign(b16_t *parg1, b16_t *parg2, bool *pnegate)
{
bool negate = false;
b16_t arg;
arg = *parg1;
if (arg < 0)
{
*parg1 = -arg;
negate = true;
}
arg = *parg2;
if (arg < 0)
{
*parg2 = -arg;
negate ^= true;
}
*pnegate = negate;
}
/****************************************************************************
* Name: adjustsign
****************************************************************************/
static b16_t adjustsign(b16_t result, bool negate)
{
/* If the product is negative, then we overflowed */
if (result < 0)
{
if (result)
{
return b16MIN;
}
else
{
return b16MAX;
}
}
/* correct the sign of the result */
if (negate)
{
return -result;
}
return result;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: b16mulb16
****************************************************************************/
b16_t b16mulb16(b16_t m1, b16_t m2)
{
bool negate;
b16_t product;
fixsign(&m1, &m2, &negate);
product = (b16_t)ub16mulub16((ub16_t)m1, (ub16_t)m2);
return adjustsign(product, negate);
}
/****************************************************************************
* Name: ub16mulub16
**************************************************************************/
ub16_t ub16mulub16(ub16_t m1, ub16_t m2)
{
/* Let:
*
* m1 = m1i*2**16 + m1f (b16)
* m2 = m2i*2**16 + m2f (b16)
*
* Then:
*
* m1*m2 = (m1i*m2i)*2**32 + (m1i*m2f + m2i*m1f)*2**16 + m1f*m2f (b32)
* = (m1i*m2i)*2**16 + (m1i*m2f + m2i*m1f) + m1f*m2f*2**-16 (b16)
* = a*2**16 + b + c*2**-16
*/
uint32_t m1i = ((uint32_t)m1 >> 16);
uint32_t m2i = ((uint32_t)m1 >> 16);
uint32_t m1f = ((uint32_t)m1 & 0x0000ffff);
uint32_t m2f = ((uint32_t)m2 & 0x0000ffff);
return (m1i*m2i << 16) + m1i*m2f + m2i*m1f + (((m1f*m2f) + b16HALF) >> 16);
}
/****************************************************************************
* Name: b16sqr
**************************************************************************/
b16_t b16sqr(b16_t a)
{
b16_t sq;
/* The result is always positive. Just take the absolute value */
if (a < 0)
{
a = -a;
}
/* Overflow occurred if the result is negative */
sq = (b16_t)ub16sqr(a);
if (sq < 0)
{
sq = b16MAX;
}
return sq;
}
/****************************************************************************
* Name: b16divb16
**************************************************************************/
ub16_t ub16sqr(ub16_t a)
{
/* Let:
*
* m = mi*2**16 + mf (b16)
*
* Then:
*
* m*m = (mi*mi)*2**32 + 2*(m1*m2)*2**16 + mf*mf (b32)
* = (mi*mi)*2**16 + 2*(mi*mf) + mf*mf*2**-16 (b16)
*/
uint32_t mi = ((uint32_t)a >> 16);
uint32_t mf = ((uint32_t)a & 0x0000ffff);
return (mi*mi << 16) + (mi*mf << 1) + ((mf*mf + b16HALF) >> 16);
}
/****************************************************************************
* Name: b16divb16
**************************************************************************/
b16_t b16divb16(b16_t num, b16_t denom)
{
bool negate;
b16_t quotient;
fixsign(&num, &denom, &negate);
quotient = (b16_t)ub16divub16((ub16_t)num, (ub16_t)denom);
return adjustsign(quotient, negate);
}
/****************************************************************************
* Name: ub16divub16
**************************************************************************/
ub16_t ub16divub16(ub16_t num, ub16_t denom)
{
uint32_t term1;
uint32_t numf;
uint32_t product;
/* Let:
*
* num = numi*2**16 + numf (b16)
* den = deni*2**16 + denf (b16)
*
* Then:
*
* num/den = numi*2**16 / den + numf / den (b0)
* = numi*2**32 / den + numf*2**16 /den (b16)
*/
/* Check for overflow in the first part of the quotient */
term1 = ((uint32_t)num & 0xffff0000) / denom;
if (term1 >= 0x00010000)
{
return ub16MAX; /* Will overflow */
}
/* Finish the division */
numf = num - term1 * denom;
term1 <<= 16;
product = term1 + (numf + (denom >> 1)) / denom;
/* Check for overflow */
if (product < term1)
{
return ub16MAX; /* Overflowed */
}
return product;
}
#endif

135
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/************************************************************
* lib/fixedmath/lib_rint.c
*
* Copyright (C) 2007, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
/************************************************************
* Compilation Switches
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdlib.h>
/************************************************************
* Definitions
************************************************************/
/************************************************************
* Private Type Declarations
************************************************************/
/************************************************************
* Private Function Prototypes
************************************************************/
/**********************************************************
* Global Constant Data
**********************************************************/
/************************************************************
* Global Variables
************************************************************/
/**********************************************************
* Private Constant Data
**********************************************************/
/************************************************************
* Private Variables
************************************************************/
double_t rint(double_t x)
{
double_t ret;
/* If the current rounding mode rounds toward negative
* infinity, rint() is identical to floor(). If the current
* rounding mode rounds toward positive infinity, rint() is
* identical to ceil().
*/
#if defined(CONFIG_FP_ROUND_POSITIVE) && CONFIG_FP_ROUNDING_POSITIVE != 0
ret = ceil(x);
#elif defined(CONFIG_FP_ROUND_NEGATIVE) && CONFIG_FP_ROUNDING_NEGATIVE != 0
ret = floor(x);
#else
/* In the default rounding mode (round to nearest), rint(x) is the
* integer nearest x with the additional stipulation that if
* |rint(x)-x|=1/2, then rint(x) is even.
*/
long dwinteger = (long)x;
double_t fremainder = x - (double_t)dwinteger;
if (x < 0.0)
{
/* fremainder should be in range 0 .. -1 */
if (fremainder == -0.5)
{
dwinteger = ((dwinteger+1)&~1);
}
else if (fremainder < -0.5)
{
dwinteger--;
}
}
else
{
/* fremainder should be in range 0 .. 1 */
if (fremainder == 0.5)
{
dwinteger = ((dwinteger+1)&~1);
}
else if (fremainder > 0.5)
{
dwinteger++;
}
}
ret = (double_t)dwinteger;
#endif
return ret;
}

171
nuttx/lib/lib.csv Normal file
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@ -0,0 +1,171 @@
"_inet_ntoa","arpa/inet.h","!defined(CONFIG_NET_IPv6) && !defined(CONFIG_CAN_PASS_STRUCTS)","FAR char","in_addr_t"
"abort","stdlib.h","","void"
"abs","stdlib.h","","int","int"
"asprintf","stdio.h","","int","FAR char **","const char *","..."
"avsprintf","stdio.h","","int","FAR char **","const char *","va_list"
"b16atan2","fixedmath.h","","b16_t","b16_t","b16_t"
"b16cos","fixedmath.h","","b16_t","b16_t"
"b16divb16","fixedmath.h","","b16_t","b16_t","b16_t"
"b16mulb16","fixedmath.h","","b16_t","b16_t","b16_t"
"b16sin","fixedmath.h","","b16_t","b16_t"
"b16sqr","fixedmath.h","","b16_t","b16_t"
"basename","libgen.h","","FAR char","FAR char *"
"cfgetspeed","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","speed_t","FAR const struct termios *"
"cfsetspeed","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","FAR struct termios *","speed_t"
"chdir","unistd.h","CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON)","int","FAR const char *"
"crc32","crc32.h","","uint32_t","FAR const uint8_t *","size_t"
"crc32part","crc32.h","","uint32_t","FAR const uint8_t *","size_t","uint32_t"
"dbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG)","int","const char *","..."
"dbg_enable","debug.h","defined(CONFIG_DEBUG_ENABLE)","void","bool"
"dirname","libgen.h","","FAR char","FAR char *"
"dq_addafter","queue.h","","void","FAR dq_entry_t *","FAR dq_entry_t *","FAR dq_queue_t *"
"dq_addbefore","queue.h","","void","FAR dq_entry_t *","FAR dq_entry_t *","FAR dq_queue_t *"
"dq_addfirst","queue.h","","void","FAR dq_entry_t *","dq_queue_t *"
"dq_addlast","queue.h","","void","FAR dq_entry_t *","dq_queue_t *"
"dq_rem","queue.h","","void","FAR dq_entry_t *","dq_queue_t *"
"dq_remfirst","queue.h","","FAR dq_entry_t","dq_queue_t *"
"dq_remlast","queue.h","","FAR dq_entry_t","dq_queue_t *"
"ether_ntoa","netinet/ether.h","","FAR char","FAR const struct ether_addr *"
"fclose","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *"
"fdopen","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","FAR FILE","int","FAR const char *"
"fflush","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *"
"fgetc","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *"
"fgetpos","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *","FAR fpos_t *"
"fgets","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","FAR char","FAR char *","int","FAR FILE *"
"fileno","stdio.h","","int","FAR FILE *"
"fopen","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","FAR FILE","FAR const char *","FAR const char *"
"fprintf","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *","FAR const char *","..."
"fputc","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","int c","FAR FILE *"
"fputs","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR const char *","FAR FILE *"
"fread","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","size_t","FAR void *","size_t","size_t","FAR FILE *"
"fseek","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *","long int","int"
"fsetpos","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *","FAR fpos_t *"
"ftell","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","long","FAR FILE *"
"fwrite","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","size_t","FAR const void *","size_t","size_t","FAR FILE *"
"getcwd","unistd.h","CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON)","FAR char","FAR char *","size_t"
"getopt","unistd.h","","int","int","FAR char *const[]","FAR const char *"
"getoptargp","unistd.h","","FAR char *"
"getoptindp","unistd.h","","int"
"getoptoptp","unistd.h","","int"
"gets","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","FAR char","FAR char *"
"gmtime","time.h","","struct tm","const time_t *"
"gmtime_r","time.h","","FAR struct tm","FAR const time_t *","FAR struct tm *"
"htonl","arpa/inet.h","","uint32_t","uint32_t"
"htons","arpa/inet.h","","uint16_t","uint16_t"
"imaxabs","stdlib.h","","intmax_t","intmax_t"
"inet_addr","arpa/inet.h","","in_addr_t","FAR const char "
"inet_ntoa","arpa/inet.h","!defined(CONFIG_NET_IPv6) && defined(CONFIG_CAN_PASS_STRUCTS)","FAR char","struct in_addr"
"inet_ntop","arpa/inet.h","","FAR const char","int","FAR const void *","FAR char *","socklen_t"
"inet_pton","arpa/inet.h","","int","int","FAR const char *","FAR void *"
"labs","stdlib.h","","long int","long int"
"lib_dumpbuffer","debug.h","","void","FAR const char *","FAR const uint8_t *","unsigned int"
"lib_lowprintf","debug.h","","int","FAR const char *","..."
"lib_rawprintf","debug.h","","int","FAR const char *","..."
"llabs","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long int","long long int"
"lldbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG) && defined(CONFIG_ARCH_LOWPUTC)","int","const char *","..."
"llvdbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_ARCH_LOWPUTC)","int","const char *","..."
"match","","","int","const char *","const char *"
"memccpy","string.h","","FAR void","FAR void *","FAR const void *","int c","size_t"
"memchr","string.h","","FAR void","FAR const void *","int c","size_t"
"memcmp","string.h","","int","FAR const void *","FAR const void *","size_t"
"memcpy","string.h","","FAR void","FAR void *","FAR const void *","size_t"
"memmove","string.h","","FAR void","FAR void *","FAR const void *","size_t"
"memset","string.h","","FAR void","FAR void *","int c","size_t"
"mktime","time.h","","time_t","const struct tm *"
"mq_getattr","mqueue.h","!defined(CONFIG_DISABLE_MQUEUE)","int","mqd_t","struct mq_attr *"
"mq_setattr","mqueue.h","!defined(CONFIG_DISABLE_MQUEUE)","int","mqd_t","const struct mq_attr *","struct mq_attr *"
"ntohl","arpa/inet.h","","uint32_t","uint32_t"
"ntohs","arpa/inet.h","","uint16_t","uint16_t"
"perror","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","void","FAR const char *"
"printf","stdio.h","","int","const char *","..."
"pthread_attr_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *"
"pthread_attr_getinheritsched","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR const pthread_attr_t *","FAR int *"
"pthread_attr_getschedparam","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","FAR struct sched_param *"
"pthread_attr_getschedpolicy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","int *"
"pthread_attr_getstacksize","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","FAR long *"
"pthread_attr_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *"
"pthread_attr_setinheritsched","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","int"
"pthread_attr_setschedparam","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","FAR const struct sched_param *"
"pthread_attr_setschedpolicy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","int"
"pthread_attr_setstacksize","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *","long"
"pthread_barrierattr_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrierattr_t *"
"pthread_barrierattr_getpshared","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR const pthread_barrierattr_t *","FAR int *"
"pthread_barrierattr_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrierattr_t *"
"pthread_barrierattr_setpshared","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrierattr_t *","int"
"pthread_condattr_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_condattr_t *"
"pthread_condattr_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_condattr_t *"
"pthread_mutexattr_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_mutexattr_t *"
"pthread_mutexattr_getpshared","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_mutexattr_t *","FAR int *"
"pthread_mutexattr_gettype","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_MUTEX_TYPES)","int","const pthread_mutexattr_t *","int *"
"pthread_mutexattr_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_mutexattr_t *"
"pthread_mutexattr_setpshared","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_mutexattr_t *","int "
"pthread_mutexattr_settype","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_MUTEX_TYPES)","int","pthread_mutexattr_t *","int"
"puts","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR const char *"
"qsort","stdlib.h","","void","void *","size_t","size_t","int(*)(const void *","const void *)"
"rand","stdlib.h","","int"
"readdir_r","dirent.h","CONFIG_NFILE_DESCRIPTORS > 0","int","FAR DIR *","FAR struct dirent *","FAR struct dirent **"
"rint","","","double_t","double_t"
"sched_get_priority_max","sched.h","","int","int"
"sched_get_priority_min","sched.h","","int","int"
"sem_getvalue","semaphore.h","","int","FAR sem_t *","FAR int *"
"sem_init","semaphore.h","","int","FAR sem_t *","int","unsigned int"
"sendfile","sys/sendfile.h","CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0","ssize_t","int","int","off_t","size_t"
"sigaddset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *","int"
"sigdelset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *","int"
"sigemptyset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *"
"sigfillset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *"
"sigismember","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR const sigset_t *","int"
"snprintf","stdio.h","","int","FAR char *","size_t","const char *","..."
"sprintf","stdio.h","","int","FAR char *","const char *","..."
"sq_addafter","queue.h","","void","FAR sq_entry_t *","FAR sq_entry_t *","FAR sq_queue_t *"
"sq_addfirst","queue.h","","void","FAR sq_entry_t *","sq_queue_t *"
"sq_addlast","queue.h","","void","FAR sq_entry_t *","sq_queue_t *"
"sq_rem","queue.h","","void","FAR sq_entry_t *","sq_queue_t *"
"sq_remafter","queue.h","","FAR sq_entry_t","FAR sq_entry_t *","sq_queue_t *"
"sq_remfirst","queue.h","","FAR sq_entry_t","sq_queue_t *"
"sq_remlast","queue.h","","FAR sq_entry_t","sq_queue_t *"
"srand","stdlib.h","","void","unsigned int"
"sscanf","stdio.h","","int","const char *","const char *","..."
"strcasecmp","string.h","","int","FAR const char *","FAR const char *"
"strcasestr","string.h","","FAR char","FAR const char *","FAR const char *"
"strcat","string.h","","FAR char","FAR char *","FAR const char *"
"strchr","string.h","","FAR char","FAR const char *","int"
"strcmp","string.h","","int","FAR const char *","FAR const char *"
"strcpy","string.h","","FAR char","char *","FAR const char *"
"strcspn","string.h","","size_t","FAR const char *","FAR const char *"
"strdup","string.h","","FAR char","FAR const char *"
"strerror","string.h","","FAR const char","int"
"strftime","time.h","","size_t","char *","size_t","const char *","const struct tm *"
"strlen","string.h","","size_t","FAR const char *"
"strncasecmp","string.h","","int","FAR const char *","FAR const char *","size_t"
"strncat","string.h","","FAR char","FAR char *","FAR const char *","size_t"
"strncmp","string.h","","int","FAR const char *","FAR const char *","size_t"
"strncpy","string.h","","FAR char","char *","FAR const char *","size_t"
"strndup","string.h","","FAR char","FAR const char *","size_t"
"strnlen","string.h","","size_t","FAR const char *","size_t"
"strpbrk","string.h","","FAR char","FAR const char *","FAR const char *"
"strrchr","string.h","","FAR char","FAR const char *","int"
"strspn","string.h","","size_t","FAR const char *","FAR const char *"
"strstr","string.h","","FAR char","FAR const char *","FAR const char *"
"strtod","stdlib.h","","double_t","const char *str","char **endptr"
"strtok","string.h","","FAR char","FAR char *","FAR const char *"
"strtok_r","string.h","","FAR char","FAR char *","FAR const char *","FAR char **"
"strtol","string.h","","long","const char *","char **","int"
"strtoll","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long","const char *nptr","char **endptr","int base"
"strtoul","stdlib.h","","unsigned long","const char *","char **","int"
"strtoull","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","unsigned long long","const char *","char **","int"
"tcflush","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","int"
"tcgetattr","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","FAR struct termios *"
"tcsetattr","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","int","FAR const struct termios *"
"telldir","dirent.h","CONFIG_NFILE_DESCRIPTORS > 0","off_t","FAR DIR *"
"time","time.h","","time_t","time_t *"
"ub16divub16","fixedmath.h","","ub16_t","ub16_t","ub16_t"
"ub16mulub16","fixedmath.h","","ub16_t","ub16_t","ub16_t"
"ub16sqr","fixedmath.h","","ub16_t","ub16_t"
"ungetc","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","int","FAR FILE *"
"vdbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_VERBOSE)","int","const char *","..."
"vfprintf","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR FILE *","const char *","va_list"
"vprintf","stdio.h","CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0","int","FAR const char *","va_list"
"vsnprintf","stdio.h","","int","FAR char *","size_t","const char *","va_list"
"vsprintf","stdio.h","","int","FAR char *","const char *","va_list"
"vsscanf","stdio.h","","int","char *","const char *","va_list"
Can't render this file because it has a wrong number of fields in line 2.

211
nuttx/lib/lib_internal.h Normal file
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@ -0,0 +1,211 @@
/****************************************************************************
* lib/lib_internal.h
*
* Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __LIB_LIB_INTERNAL_H
#define __LIB_LIB_INTERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <limits.h>
#include <semaphore.h>
#include <nuttx/streams.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* This configuration directory is used in environment variable processing
* when we need to reference the user's home directory. There are no user
* directories in NuttX so, by default, this always refers to the root
* directory.
*/
#ifndef CONFIG_LIB_HOMEDIR
# define CONFIG_LIB_HOMEDIR "/"
#endif
/* If C std I/O buffering is not supported, then we don't need its semaphore
* protection.
*/
#if CONFIG_STDIO_BUFFER_SIZE <= 0
# define lib_sem_initialize(s)
# define lib_take_semaphore(s)
# define lib_give_semaphore(s)
#endif
/* The NuttX C library an be build in two modes: (1) as a standard, C-libary
* that can be used by normal, user-space applications, or (2) as a special,
* kernel-mode C-library only used within the OS. If NuttX is not being
* built as separated kernel- and user-space modules, then only the first
* mode is supported.
*/
#if defined(CONFIG_NUTTX_KERNEL) && defined(__KERNEL__)
# include <nuttx/kmalloc.h>
# define lib_malloc(s) kmalloc(s)
# define lib_zalloc(s) kzalloc(s)
# define lib_realloc(p,s) krealloc(p,s)
# define lib_free(p) kfree(p)
#else
# include <stdlib.h>
# define lib_malloc(s) malloc(s)
# define lib_zalloc(s) zalloc(s)
# define lib_realloc(p,s) realloc(p,s)
# define lib_free(p) free(p)
#endif
#define LIB_BUFLEN_UNKNOWN INT_MAX
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/* Debug output is initially disabled */
#ifdef CONFIG_DEBUG_ENABLE
extern bool g_dbgenable;
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Defined in lib_streamsem.c */
#if CONFIG_NFILE_STREAMS > 0
void stream_semtake(FAR struct streamlist *list);
void stream_semgive(FAR struct streamlist *list);
#endif
/* Defined in lib_libnoflush.c */
#ifdef CONFIG_STDIO_LINEBUFFER
int lib_noflush(FAR struct lib_outstream_s *this);
#endif
/* Defined in lib_libsprintf.c */
int lib_sprintf(FAR struct lib_outstream_s *obj,
const char *fmt, ...);
/* Defined lib_libvsprintf.c */
int lib_vsprintf(FAR struct lib_outstream_s *obj,
FAR const char *src, va_list ap);
/* Defined lib_rawprintf.c */
int lib_rawvprintf(const char *src, va_list ap);
/* Defined lib_lowprintf.c */
int lib_lowvprintf(const char *src, va_list ap);
/* Defined in lib_dtoa.c */
#ifdef CONFIG_LIBC_FLOATINGPOINT
char *__dtoa(double d, int mode, int ndigits, int *decpt, int *sign,
char **rve);
#endif
/* Defined in lib_libwrite.c */
ssize_t lib_fwrite(FAR const void *ptr, size_t count, FAR FILE *stream);
/* Defined in lib_libfread.c */
ssize_t lib_fread(FAR void *ptr, size_t count, FAR FILE *stream);
/* Defined in lib_libfflush.c */
ssize_t lib_fflush(FAR FILE *stream, bool bforce);
/* Defined in lib_rdflush.c */
int lib_rdflush(FAR FILE *stream);
/* Defined in lib_wrflush.c */
int lib_wrflush(FAR FILE *stream);
/* Defined in lib_sem.c */
#if CONFIG_STDIO_BUFFER_SIZE > 0
void lib_sem_initialize(FAR struct file_struct *stream);
void lib_take_semaphore(FAR struct file_struct *stream);
void lib_give_semaphore(FAR struct file_struct *stream);
#endif
/* Defined in lib_libgetbase.c */
int lib_getbase(const char *nptr, const char **endptr);
/* Defined in lib_skipspace.c */
void lib_skipspace(const char **pptr);
/* Defined in lib_isbasedigit.c */
bool lib_isbasedigit(int ch, int base, int *value);
/* Defined in lib_checkbase.c */
int lib_checkbase(int base, const char **pptr);
/* Defined in lib_expi.c */
#ifdef CONFIG_LIBM
double lib_expi(size_t n);
#endif
/* Defined in lib_libsqrtapprox.c */
#ifdef CONFIG_LIBM
float lib_sqrtapprox(float x);
#endif
#endif /* __LIB_LIB_INTERNAL_H */

43
nuttx/lib/libgen/Make.defs Normal file
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@ -0,0 +1,43 @@
############################################################################
# lib/libgen/Make.defs
#
# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Add the libgen C files to the build
CSRCS += lib_basename.c lib_dirname.c
# Add the libgen directory to the build
DEPPATH += --dep-path libgen
VPATH += :libgen

131
nuttx/lib/libgen/lib_basename.c Normal file
View File

@ -0,0 +1,131 @@
/****************************************************************************
* lib/libgen/lib_basename.c
*
* Copyright (C) 2007, 2009, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <libgen.h>
/****************************************************************************
* Private Data
****************************************************************************/
static char g_retchar[2];
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Function: basename
*
* Description:
* basename() extracts the filename component from a null-terminated
* pathname string. In the usual case, basename() returns the component
* following the final '/'. Trailing '/' characters are not counted as
* part of the pathname.
*
* If path does not contain a slash, basename() returns a copy of path.
* If path is the string "/", then basename() returns the string "/". If
* path is a NULL pointer or points to an empty string, then basename()
* return the string ".".
*
* basename() may modify the contents of path, so copies should be passed.
* basename() may return pointers to statically allocated memory which may
* be overwritten by subsequent calls.
*
* Parameter:
* path The null-terminated string referring to the path to be decomposed
*
* Return:
* On success the filename component of the path is returned.
*
****************************************************************************/
FAR char *basename(FAR char *path)
{
char *p;
int len;
int ch;
/* Handle some corner cases */
if (!path || *path == '\0')
{
ch = '.';
goto out_retchar;
}
/* Check for trailing slash characters */
len = strlen(path);
while (path[len-1] == '/')
{
/* Remove trailing '/' UNLESS this would make a zero length string */
if (len > 1)
{
path[len-1] = '\0';
len--;
}
else
{
ch = '/';
goto out_retchar;
}
}
/* Get the address of the last '/' which is not at the end of the path and,
* therefor, must be just before the beginning of the filename component.
*/
p = strrchr(path, '/');
if (p)
{
return p + 1;
}
/* There is no '/' in the path */
return path;
out_retchar:
g_retchar[0] = ch;
g_retchar[1] = '\0';
return g_retchar;
}

144
nuttx/lib/libgen/lib_dirname.c Normal file
View File

@ -0,0 +1,144 @@
/****************************************************************************
* lib/libgen/lib_dirname.c
*
* Copyright (C) 2007, 2009, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <libgen.h>
/****************************************************************************
* Private Data
****************************************************************************/
static char g_retchar[2];
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Function: dirname
*
* Description:
* dirname() extracts the directory component from a null-terminated
* pathname string. In the usual case, dirname() returns the string up
* to, but not including, the final '/'. Trailing '/' characters are not
* counted as part of the pathname.
*
* If path does not contain a slash, dirname() returns the string ".". If
* path is the string "/", then dirname() returns the string "/". If path
* is a NULL pointer or points to an empty string, then dirname() returns
* the string ".".
*
* dirname() may modify the contents of path, so copies should be passed.
* dirname() may return pointers to statically allocated memory which may
* be overwritten by subsequent calls.
*
* Parameter:
* path The null-terminated string referring to the path to be decomposed
*
* Return:
* On success the directory component of the path is returned.
*
****************************************************************************/
FAR char *dirname(FAR char *path)
{
char *p;
int len;
int ch;
/* Handle some corner cases */
if (!path || *path == '\0')
{
ch = '.';
goto out_retchar;
}
/* Check for trailing slash characters */
len = strlen(path);
while (path[len-1] == '/')
{
/* Remove trailing '/' UNLESS this would make a zero length string */
if (len > 1)
{
path[len-1] = '\0';
len--;
}
else
{
ch = '/';
goto out_retchar;
}
}
/* Get the address of the last '/' which is not at the end of the path and,
* therefor, must be the end of the directory component.
*/
p = strrchr(path, '/');
if (p)
{
/* Handle the case where the only '/' in the string is the at the beginning
* of the path.
*/
if (p == path)
{
ch = '/';
goto out_retchar;
}
/* No, the directory component is the substring before the '/'. */
*p = '\0';
return path;
}
/* There is no '/' in the path */
ch = '.';
out_retchar:
g_retchar[0] = ch;
g_retchar[1] = '\0';
return g_retchar;
}

26
nuttx/lib/math/Kconfig Normal file
View File

@ -0,0 +1,26 @@
#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
config LIBM
bool "Math library"
default n
depends on !ARCH_MATH_H
---help---
By default, no math library will be provided by NuttX. In this this case, it
is assumed that (1) no math library is required, or (2) you will be using the
math.h header file and the libm library provided by your toolchain.
This is may be a very good choice is possible because your toolchain may have
have a highly optimized version of libm.
Another possibility is that you have a custom, architecture-specific math
libary and that the corresponding math.h file resides at arch/<architecture>/include/math.h.
The option is selected via ARCH_MATH_H. If ARCH_MATH_H is selected,then the include/nuttx/math.h
header file will be copied to include/math.h where it can be used by your applications.
If ARCH_MATH_H is not defined, then this option can be selected to build a generic,
math library built into NuttX. This math library comes from the Rhombus OS and
was written by Nick Johnson. The Rhombus OS math library port was contributed by
Darcy Gong.

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############################################################################
# lib/math/Make.defs
#
# Copyright (C) 2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
ifeq ($(CONFIG_LIBM),y)
# Add the floating point math C files to the build
CSRCS += lib_acosf.c lib_asinf.c lib_atan2f.c lib_atanf.c lib_ceilf.c lib_cosf.c
CSRCS += lib_coshf.c lib_expf.c lib_fabsf.c lib_floorf.c lib_fmodf.c lib_frexpf.c
CSRCS += lib_ldexpf.c lib_logf.c lib_log10f.c lib_log2f.c lib_modff.c lib_powf.c
CSRCS += lib_sinf.c lib_sinhf.c lib_sqrtf.c lib_tanf.c lib_tanhf.c
CSRCS += lib_acos.c lib_asin.c lib_atan.c lib_atan2.c lib_ceil.c lib_cos.c
CSRCS += lib_cosh.c lib_exp.c lib_fabs.c lib_floor.c lib_fmod.c lib_frexp.c
CSRCS += lib_ldexp.c lib_log.c lib_log10.c lib_log2.c lib_modf.c lib_pow.c
CSRCS += lib_sin.c lib_sinh.c lib_sqrt.c lib_tan.c lib_tanh.c
CSRCS += lib_acosl.c lib_asinl.c lib_atan2l.c lib_atanl.c lib_ceill.c lib_cosl.c
CSRCS += lib_coshl.c lib_expl.c lib_fabsl.c lib_floorl.c lib_fmodl.c lib_frexpl.c
CSRCS += lib_ldexpl.c lib_logl.c lib_log10l.c lib_log2l.c lib_modfl.c lib_powl.c
CSRCS += lib_sinl.c lib_sinhl.c lib_sqrtl.c lib_tanl.c lib_tanhl.c
CSRCS += lib_libexpi.c lib_libsqrtapprox.c
# Add the floating point math directory to the build
DEPPATH += --dep-path math
VPATH += :math
endif

46
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/************************************************************************
* lib/math/lib_acos.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double acos(double x)
{
return (M_PI_2 - asin(x));
}
#endif

41
nuttx/lib/math/lib_acosf.c Normal file
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/************************************************************************
* lib/math/lib_acosf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float acosf(float x)
{
return (M_PI_2 - asinf(x));
}

46
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/************************************************************************
* lib/math/lib_acos.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double acosl(long double x)
{
return (M_PI_2 - asinl(x));
}
#endif

69
nuttx/lib/math/lib_asin.c Normal file
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/************************************************************************
* lib/math/lib_sin.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double asin(double x)
{
long double y, y_sin, y_cos;
y = 0;
while (1)
{
y_sin = sin(y);
y_cos = cos(y);
if (y > M_PI_2 || y < -M_PI_2)
{
y = fmod(y, M_PI);
}
if (y_sin + DBL_EPSILON >= x && y_sin - DBL_EPSILON <= x)
{
break;
}
y = y - (y_sin - x) / y_cos;
}
return y;
}
#endif

65
nuttx/lib/math/lib_asinf.c Normal file
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/************************************************************************
* lib/math/lib_sinf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
float asinf(float x)
{
long double y, y_sin, y_cos;
y = 0;
while (1)
{
y_sin = sinf(y);
y_cos = cosf(y);
if (y > M_PI_2 || y < -M_PI_2)
{
y = fmodf(y, M_PI);
}
if (y_sin + FLT_EPSILON >= x && y_sin - FLT_EPSILON <= x)
{
break;
}
y = y - (y_sin - x) / y_cos;
}
return y;
}

69
nuttx/lib/math/lib_asinl.c Normal file
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/************************************************************************
* lib/math/lib_sinl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double asinl(long double x)
{
long double y, y_sin, y_cos;
y = 0;
while (1)
{
y_sin = sinl(y);
y_cos = cosl(y);
if (y > M_PI_2 || y < -M_PI_2)
{
y = fmodl(y, M_PI);
}
if (y_sin + LDBL_EPSILON >= x && y_sin - LDBL_EPSILON <= x)
{
break;
}
y = y - (y_sin - x) / y_cos;
}
return y;
}
#endif

48
nuttx/lib/math/lib_atan.c Normal file
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/************************************************************************
* lib/math/lib_atan.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <stddef.h>
#include <stdint.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double atan(double x)
{
return asin(x / sqrt(x * x + 1));
}
#endif

86
nuttx/lib/math/lib_atan2.c Normal file
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/************************************************************************
* lib/math/lib_atan2.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double atan2(double y, double x)
{
if (y == 0.0)
{
if (x >= 0.0)
{
return 0.0;
}
else
{
return M_PI;
}
}
else if (y > 0.0)
{
if (x == 0.0)
{
return M_PI_2;
}
else if (x > 0.0)
{
return atan(y / x);
}
else
{
return M_PI - atan(y / x);
}
}
else
{
if (x == 0.0)
{
return M_PI + M_PI_2;
}
else if (x > 0.0)
{
return 2 * M_PI - atan(y / x);
}
else
{
return M_PI + atan(y / x);
}
}
}
#endif

81
nuttx/lib/math/lib_atan2f.c Normal file
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/************************************************************************
* lib/math/lib_atan2f.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float atan2f(float y, float x)
{
if (y == 0.0)
{
if (x >= 0.0)
{
return 0.0;
}
else
{
return M_PI;
}
}
else if (y > 0.0)
{
if (x == 0.0)
{
return M_PI_2;
}
else if (x > 0.0)
{
return atanf(y / x);
}
else
{
return M_PI - atanf(y / x);
}
}
else
{
if (x == 0.0)
{
return M_PI + M_PI_2;
}
else if (x > 0.0)
{
return 2 * M_PI - atanf(y / x);
}
else
{
return M_PI + atanf(y / x);
}
}
}

87
nuttx/lib/math/lib_atan2l.c Normal file
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/************************************************************************
* lib/math/lib_atan2l.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double atan2l(long double y, long double x)
{
if (y == 0.0)
{
if (x >= 0.0)
{
return 0.0;
}
else
{
return M_PI;
}
}
else if (y > 0.0)
{
if (x == 0.0)
{
return M_PI_2;
}
else if (x > 0.0)
{
return atanl(y / x);
}
else
{
return M_PI - atanl(y / x);
}
}
else
{
if (x == 0.0)
{
return M_PI + M_PI_2;
}
else if (x > 0.0)
{
return 2 * M_PI - atanl(y / x);
}
else
{
return M_PI + atanl(y / x);
}
}
}
#endif

43
nuttx/lib/math/lib_atanf.c Normal file
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/************************************************************************
* lib/math/lib_atanf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
#include <stddef.h>
#include <stdint.h>
/************************************************************************
* Public Functions
************************************************************************/
float atanf(float x)
{
return asinf(x / sqrtf(x * x + 1));
}

48
nuttx/lib/math/lib_atanl.c Normal file
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/************************************************************************
* lib/math/lib_atanl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <stddef.h>
#include <stdint.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double atanl(long double x)
{
return asinl(x / sqrtl(x * x + 1));
}
#endif

52
nuttx/lib/math/lib_ceil.c Normal file
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/************************************************************************
* lib/math/lib_ceil.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double ceil(double x)
{
modf(x, &x);
if (x > 0.0)
{
x += 1.0;
}
return x;
}
#endif

47
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/************************************************************************
* lib/math/lib_ceilf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float ceilf(float x)
{
modff(x, &x);
if (x > 0.0)
{
x += 1.0;
}
return x;
}

52
nuttx/lib/math/lib_ceill.c Normal file
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/************************************************************************
* lib/math/lib_ceil;.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double ceill(long double x)
{
modfl(x, &x);
if (x > 0.0)
{
x += 1.0;
}
return x;
}
#endif

46
nuttx/lib/math/lib_cos.c Normal file
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/************************************************************************
* lib/math/lib_cos.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double cos(double x)
{
return sin(x + M_PI_2);
}
#endif

41
nuttx/lib/math/lib_cosf.c Normal file
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/************************************************************************
* lib/math/lib_cosf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float cosf(float x)
{
return sinf(x + M_PI_2);
}

47
nuttx/lib/math/lib_cosh.c Normal file
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/************************************************************************
* lib/math/lib_cosh.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double cosh(double x)
{
x = exp(x);
return ((x + (1.0 / x)) / 2.0);
}
#endif

42
nuttx/lib/math/lib_coshf.c Normal file
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/************************************************************************
* lib/math/lib_coshf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float coshf(float x)
{
x = expf(x);
return ((x + (1.0 / x)) / 2.0);
}

47
nuttx/lib/math/lib_coshl.c Normal file
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/************************************************************************
* lib/math/lib_coshl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double coshl(long double x)
{
x = expl(x);
return ((x + (1.0 / x)) / 2.0);
}
#endif

46
nuttx/lib/math/lib_cosl.c Normal file
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/************************************************************************
* lib/math/lib_cosl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double cosl(long double x)
{
return sinl(x + M_PI_2);
}
#endif

126
nuttx/lib/math/lib_exp.c Normal file
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/************************************************************************
* lib/math/lib_exp.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <math.h>
#include "lib_internal.h"
#ifdef CONFIG_HAVE_DOUBLE
/************************************************************************
* Private Data
************************************************************************/
static double _dbl_inv_fact[] =
{
1.0 / 1.0, // 1 / 0!
1.0 / 1.0, // 1 / 1!
1.0 / 2.0, // 1 / 2!
1.0 / 6.0, // 1 / 3!
1.0 / 24.0, // 1 / 4!
1.0 / 120.0, // 1 / 5!
1.0 / 720.0, // 1 / 6!
1.0 / 5040.0, // 1 / 7!
1.0 / 40320.0, // 1 / 8!
1.0 / 362880.0, // 1 / 9!
1.0 / 3628800.0, // 1 / 10!
1.0 / 39916800.0, // 1 / 11!
1.0 / 479001600.0, // 1 / 12!
1.0 / 6227020800.0, // 1 / 13!
1.0 / 87178291200.0, // 1 / 14!
1.0 / 1307674368000.0, // 1 / 15!
1.0 / 20922789888000.0, // 1 / 16!
1.0 / 355687428096000.0, // 1 / 17!
1.0 / 6402373705728000.0, // 1 / 18!
};
/************************************************************************
* Public Functions
************************************************************************/
double exp(double x)
{
size_t int_part;
bool invert;
double value;
double x0;
size_t i;
if (x == 0)
{
return 1;
}
else if (x < 0)
{
invert = true;
x = -x;
}
else
{
invert = false;
}
/* Extract integer component */
int_part = (size_t) x;
/* Set x to fractional component */
x -= (double)int_part;
/* Perform Taylor series approximation with nineteen terms */
value = 0.0;
x0 = 1.0;
for (i = 0; i < 19; i++)
{
value += x0 * _dbl_inv_fact[i];
x0 *= x;
}
/* Multiply by exp of the integer component */
value *= lib_expi(int_part);
if (invert)
{
return (1.0 / value);
}
else
{
return value;
}
}
#endif

112
nuttx/lib/math/lib_expf.c Normal file
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/************************************************************************
* lib/math/lib_expf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <sys/types.h>
#include <math.h>
#include "lib_internal.h"
/************************************************************************
* Private Data
************************************************************************/
static float _flt_inv_fact[] =
{
1.0 / 1.0, // 1/0!
1.0 / 1.0, // 1/1!
1.0 / 2.0, // 1/2!
1.0 / 6.0, // 1/3!
1.0 / 24.0, // 1/4!
1.0 / 120.0, // 1/5!
1.0 / 720.0, // 1/6!
1.0 / 5040.0, // 1/7!
1.0 / 40320.0, // 1/8!
1.0 / 362880.0, // 1/9!
1.0 / 3628800.0, // 1/10!
};
/************************************************************************
* Public Functions
************************************************************************/
float expf(float x)
{
size_t int_part;
bool invert;
float value;
float x0;
size_t i;
if (x == 0)
{
return 1;
}
else if (x < 0)
{
invert = true;
x = -x;
}
else
{
invert = false;
}
/* Extract integer component */
int_part = (size_t) x;
/* set x to fractional component */
x -= (float)int_part;
/* Perform Taylor series approximation with eleven terms */
value = 0.0;
x0 = 1.0;
for (i = 0; i < 10; i++)
{
value += x0 * _flt_inv_fact[i];
x0 *= x;
}
/* Multiply by exp of the integer component */
value *= lib_expi(int_part);
if (invert)
{
return (1.0 / value);
}
else
{
return value;
}
}

126
nuttx/lib/math/lib_expl.c Normal file
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/************************************************************************
* lib/math/lib_expl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <math.h>
#include "lib_internal.h"
#ifdef CONFIG_HAVE_LONG_DOUBLE
/************************************************************************
* Private Data
************************************************************************/
static long double _ldbl_inv_fact[] =
{
1.0 / 1.0, // 1 / 0!
1.0 / 1.0, // 1 / 1!
1.0 / 2.0, // 1 / 2!
1.0 / 6.0, // 1 / 3!
1.0 / 24.0, // 1 / 4!
1.0 / 120.0, // 1 / 5!
1.0 / 720.0, // 1 / 6!
1.0 / 5040.0, // 1 / 7!
1.0 / 40320.0, // 1 / 8!
1.0 / 362880.0, // 1 / 9!
1.0 / 3628800.0, // 1 / 10!
1.0 / 39916800.0, // 1 / 11!
1.0 / 479001600.0, // 1 / 12!
1.0 / 6227020800.0, // 1 / 13!
1.0 / 87178291200.0, // 1 / 14!
1.0 / 1307674368000.0, // 1 / 15!
1.0 / 20922789888000.0, // 1 / 16!
1.0 / 355687428096000.0, // 1 / 17!
1.0 / 6402373705728000.0, // 1 / 18!
};
/************************************************************************
* Public Functions
************************************************************************/
long double expl(long double x)
{
size_t int_part;
bool invert;
long double value;
long double x0;
size_t i;
if (x == 0)
{
return 1;
}
else if (x < 0)
{
invert = true;
x = -x;
}
else
{
invert = false;
}
/* Extract integer component */
int_part = (size_t) x;
/* Set x to fractional component */
x -= (long double)int_part;
/* Perform Taylor series approximation with nineteen terms */
value = 0.0;
x0 = 1.0;
for (i = 0; i < 19; i++)
{
value += x0 * _ldbl_inv_fact[i];
x0 *= x;
}
/* Multiply by exp of the integer component */
value *= lib_expi(int_part);
if (invert)
{
return (1.0 / value);
}
else
{
return value;
}
}
#endif

46
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/************************************************************************
* lib/math/lib_fabs.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double fabs(double x)
{
return ((x < 0) ? -x : x);
}
#endif

41
nuttx/lib/math/lib_fabsf.c Normal file
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/************************************************************************
* lib/math/lib_fabsf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float fabsf(float x)
{
return ((x < 0) ? -x : x);
}

46
nuttx/lib/math/lib_fabsl.c Normal file
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/************************************************************************
* lib/math/lib_fabsl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double fabsl(long double x)
{
return ((x < 0) ? -x : x);
}
#endif

52
nuttx/lib/math/lib_floor.c Normal file
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/************************************************************************
* lib/math/lib_floor.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double floor(double x)
{
modf(x, &x);
if (x < 0.0)
{
x -= 1.0;
}
return x;
}
#endif

47
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/************************************************************************
* lib/math/lib_floorf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float floorf(float x)
{
modff(x, &x);
if (x < 0.0)
{
x -= 1.0;
}
return x;
}

52
nuttx/lib/math/lib_floorl.c Normal file
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/************************************************************************
* lib/math/lib_floorl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double floorl(long double x)
{
modfl(x, &x);
if (x < 0.0)
{
x -= 1.0;
}
return x;
}
#endif

52
nuttx/lib/math/lib_fmod.c Normal file
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/************************************************************************
* lib/math/lib_fmod.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double fmod(double x, double div)
{
double n0;
x /= div;
x = modf(x, &n0);
x *= div;
return x;
}
#endif

47
nuttx/lib/math/lib_fmodf.c Normal file
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/************************************************************************
* lib/math/lib_fmodf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float fmodf(float x, float div)
{
float n0;
x /= div;
x = modff(x, &n0);
x *= div;
return x;
}

52
nuttx/lib/math/lib_fmodl.c Normal file
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/************************************************************************
* lib/math/lib_fmodl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double fmodl(long double x, long double div)
{
long double n0;
x /= div;
x = modfl(x, &n0);
x *= div;
return x;
}
#endif

47
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/************************************************************************
* lib/math/lib_frexp.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double frexp(double x, int *exponent)
{
*exponent = (int)ceil(log2(x));
return x / ldexp(1.0, *exponent);
}
#endif

42
nuttx/lib/math/lib_frexpf.c Normal file
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/************************************************************************
* lib/math/lib_frexpf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float frexpf(float x, int *exponent)
{
*exponent = (int)ceilf(log2f(x));
return x / ldexpf(1.0, *exponent);
}

47
nuttx/lib/math/lib_frexpl.c Normal file
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/************************************************************************
* lib/math/lib_frexpl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double frexpl(long double x, int *exponent)
{
*exponent = (int)ceill(log2(x));
return x / ldexpl(1.0, *exponent);
}
#endif

46
nuttx/lib/math/lib_ldexp.c Normal file
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/************************************************************************
* lib/math/lib_ldexp.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double ldexp(double x, int n)
{
return (x * pow(2.0, (double)n));
}
#endif

41
nuttx/lib/math/lib_ldexpf.c Normal file
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/************************************************************************
* lib/math/lib_ldexpf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float ldexpf(float x, int n)
{
return (x * powf(2.0, (float)n));
}

46
nuttx/lib/math/lib_ldexpl.c Normal file
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/************************************************************************
* lib/math/lib_ldexpl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double ldexpl(long double x, int n)
{
return (x * powl(2.0, (long double)n));
}
#endif

103
nuttx/lib/math/lib_libexpi.c Normal file
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/************************************************************************
* lib/math/lib_libexpi.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Pre-processor Definitions
************************************************************************/
#define M_E2 (M_E * M_E)
#define M_E4 (M_E2 * M_E2)
#define M_E8 (M_E4 * M_E4)
#define M_E16 (M_E8 * M_E8)
#define M_E32 (M_E16 * M_E16)
#define M_E64 (M_E32 * M_E32)
#define M_E128 (M_E64 * M_E64)
#define M_E256 (M_E128 * M_E128)
#define M_E512 (M_E256 * M_E256)
#define M_E1024 (M_E512 * M_E512)
/************************************************************************
* Private Data
************************************************************************/
static double _expi_square_tbl[11] =
{
M_E, // e^1
M_E2, // e^2
M_E4, // e^4
M_E8, // e^8
M_E16, // e^16
M_E32, // e^32
M_E64, // e^64
M_E128, // e^128
M_E256, // e^256
M_E512, // e^512
M_E1024, // e^1024
};
/************************************************************************
* Public Functions
************************************************************************/
double lib_expi(size_t n)
{
size_t i;
double val;
if (n > 1024)
{
return INFINITY;
}
val = 1.0;
for (i = 0; n; i++)
{
if (n & (1 << i))
{
n &= ~(1 << i);
val *= _expi_square_tbl[i];
}
}
return val;
}

50
nuttx/lib/math/lib_libsqrtapprox.c Normal file
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/************************************************************************
* lib/math/lib_libsqrtapprox.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <stdint.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float lib_sqrtapprox(float x)
{
int32_t i;
/* Floats + bit manipulation = +inf fun! */
i = *((int32_t *) & x);
i = 0x1fc00000 + (i >> 1);
x = *((float *)&i);
return x;
}

82
nuttx/lib/math/lib_log.c Normal file
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/************************************************************************
* lib/math/lib_log.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double log(double x)
{
double y, y_old, ey, epsilon;
y = 0.0;
y_old = 1.0;
epsilon = DBL_EPSILON;
while (y > y_old + epsilon || y < y_old - epsilon)
{
y_old = y;
ey = exp(y);
y -= (ey - x) / ey;
if (y > 700.0)
{
y = 700.0;
}
if (y < -700.0)
{
y = -700.0;
}
epsilon = (fabs(y) > 1.0) ? fabs(y) * DBL_EPSILON : DBL_EPSILON;
}
if (y == 700.0)
{
return INFINITY;
}
if (y == -700.0)
{
return INFINITY;
}
return y;
}
#endif

46
nuttx/lib/math/lib_log10.c Normal file
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/************************************************************************
* lib/math/lib_log10.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double log10(double x)
{
return (log(x) / M_LN10);
}
#endif

41
nuttx/lib/math/lib_log10f.c Normal file
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/************************************************************************
* lib/math/lib_log10f.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float log10f(float x)
{
return (logf(x) / M_LN10);
}

46
nuttx/lib/math/lib_log10l.c Normal file
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@ -0,0 +1,46 @@
/************************************************************************
* lib/math/lib_log10l.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double log10l(long double x)
{
return (logl(x) / M_LN10);
}
#endif

46
nuttx/lib/math/lib_log2.c Normal file
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@ -0,0 +1,46 @@
/************************************************************************
* lib/math/lib_log2.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double log2(double x)
{
return (log(x) / M_LN2);
}
#endif

41
nuttx/lib/math/lib_log2f.c Normal file
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/************************************************************************
* lib/math/lib_log2f.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float log2f(float x)
{
return (logf(x) / M_LN2);
}

46
nuttx/lib/math/lib_log2l.c Normal file
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/************************************************************************
* lib/math/lib_log2l.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double log2l(long double x)
{
return (logl(x) / M_LN2);
}
#endif

77
nuttx/lib/math/lib_logf.c Normal file
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/************************************************************************
* lib/math/lib_logf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
float logf(float x)
{
float y, y_old, ey, epsilon;
y = 0.0;
y_old = 1.0;
epsilon = FLT_EPSILON;
while (y > y_old + epsilon || y < y_old - epsilon)
{
y_old = y;
ey = exp(y);
y -= (ey - x) / ey;
if (y > 700.0)
{
y = 700.0;
}
if (y < -700.0)
{
y = -700.0;
}
epsilon = (fabs(y) > 1.0) ? fabs(y) * FLT_EPSILON : FLT_EPSILON;
}
if (y == 700.0)
{
return INFINITY;
}
if (y == -700.0)
{
return INFINITY;
}
return y;
}

80
nuttx/lib/math/lib_logl.c Normal file
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/************************************************************************
* lib/math/lib_lol.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <float.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double logl(long double x)
{
long double y, y_old, ey, epsilon;
y = 0.0;
y_old = 1.0;
epsilon = LDBL_EPSILON;
while (y > y_old + epsilon || y < y_old - epsilon)
{
y_old = y;
ey = expl(y);
y -= (ey - x) / ey;
if (y > 700.0)
{
y = 700.0;
}
if (y < -700.0)
{
y = -700.0;
}
}
if (y == 700.0)
{
return INFINITY;
}
if (y == -700.0)
{
return INFINITY;
}
return y;
}
#endif

58
nuttx/lib/math/lib_modf.c Normal file
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@ -0,0 +1,58 @@
/************************************************************************
* lib/math/lib_modf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <stdint.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double modf(double x, double *iptr)
{
if (fabs(x) >= 4503599627370496.0)
{
*iptr = x;
return 0.0;
}
else if (fabs(x) < 1.0)
{
*iptr = 0.0;
return x;
}
else
{
*iptr = (double)(int64_t) x;
return (x - *iptr);
}
}
#endif

55
nuttx/lib/math/lib_modff.c Normal file
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@ -0,0 +1,55 @@
/************************************************************************
* lib/math/lib_modff.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float modff(float x, float *iptr)
{
if (fabsf(x) >= 8388608.0)
{
*iptr = x;
return 0.0;
}
else if (fabs(x) < 1.0)
{
*iptr = 0.0;
return x;
}
else
{
*iptr = (float)(int)x;
return (x - *iptr);
}
}

61
nuttx/lib/math/lib_modfl.c Normal file
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@ -0,0 +1,61 @@
/************************************************************************
* lib/math/lib_modfl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double modfl(long double x, long double *iptr)
{
if (fabs(x) >= 4503599627370496.0)
{
*iptr = x;
return 0.0;
}
else if (fabs(x) < 1.0)
{
*iptr = 0.0;
return x;
}
else
{
*iptr = (long double)(int64_t) x;
return (x - *iptr);
}
}
#endif

46
nuttx/lib/math/lib_pow.c Normal file
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@ -0,0 +1,46 @@
/************************************************************************
* lib/math/lib_pow.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double pow(double b, double e)
{
return exp(e * log(b));
}
#endif

41
nuttx/lib/math/lib_powf.c Normal file
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/************************************************************************
* lib/math/lib_powf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float powf(float b, float e)
{
return expf(e * logf(b));
}

46
nuttx/lib/math/lib_powl.c Normal file
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@ -0,0 +1,46 @@
/************************************************************************
* lib/math/lib_powl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double powl(long double b, long double e)
{
return expl(e * logl(b));
}
#endif

114
nuttx/lib/math/lib_sin.c Normal file
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/************************************************************************
* lib/math/lib_sin.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <math.h>
#ifdef CONFIG_HAVE_DOUBLE
/************************************************************************
* Private Data
************************************************************************/
static double _dbl_inv_fact[] =
{
1.0 / 1.0, // 1 / 1!
1.0 / 6.0, // 1 / 3!
1.0 / 120.0, // 1 / 5!
1.0 / 5040.0, // 1 / 7!
1.0 / 362880.0, // 1 / 9!
1.0 / 39916800.0, // 1 / 11!
1.0 / 6227020800.0, // 1 / 13!
1.0 / 1307674368000.0, // 1 / 15!
1.0 / 355687428096000.0, // 1 / 17!
1.0 / 121645100408832000.0, // 1 / 19!
};
/************************************************************************
* Public Functions
************************************************************************/
double sin(double x)
{
double x_squared;
double sin_x;
size_t i;
/* Move x to [-pi, pi) */
x = fmod(x, 2 * M_PI);
if (x >= M_PI)
{
x -= 2 * M_PI;
}
if (x < -M_PI)
{
x += 2 * M_PI;
}
/* Move x to [-pi/2, pi/2) */
if (x >= M_PI_2)
{
x = M_PI - x;
}
if (x < -M_PI_2)
{
x = -M_PI - x;
}
x_squared = x * x;
sin_x = 0.0;
/* Perform Taylor series approximation for sin(x) with ten terms */
for (i = 0; i < 10; i++)
{
if (i % 2 == 0)
{
sin_x += x * _dbl_inv_fact[i];
}
else
{
sin_x -= x * _dbl_inv_fact[i];
}
x *= x_squared;
}
return sin_x;
}
#endif

104
nuttx/lib/math/lib_sinf.c Normal file
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/************************************************************************
* lib/math/lib_sinf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <sys/types.h>
#include <math.h>
/************************************************************************
* Private Data
************************************************************************/
static float _flt_inv_fact[] =
{
1.0 / 1.0, // 1 / 1!
1.0 / 6.0, // 1 / 3!
1.0 / 120.0, // 1 / 5!
1.0 / 5040.0, // 1 / 7!
1.0 / 362880.0, // 1 / 9!
1.0 / 39916800.0, // 1 / 11!
};
/************************************************************************
* Public Functions
************************************************************************/
float sinf(float x)
{
float x_squared;
float sin_x;
size_t i;
/* Move x to [-pi, pi) */
x = fmodf(x, 2 * M_PI);
if (x >= M_PI)
{
x -= 2 * M_PI;
}
if (x < -M_PI)
{
x += 2 * M_PI;
}
/* Move x to [-pi/2, pi/2) */
if (x >= M_PI_2)
{
x = M_PI - x;
}
if (x < -M_PI_2)
{
x = -M_PI - x;
}
x_squared = x * x;
sin_x = 0.0;
/* Perform Taylor series approximation for sin(x) with six terms */
for (i = 0; i < 6; i++)
{
if (i % 2 == 0)
{
sin_x += x * _flt_inv_fact[i];
}
else
{
sin_x -= x * _flt_inv_fact[i];
}
x *= x_squared;
}
return sin_x;
}

47
nuttx/lib/math/lib_sinh.c Normal file
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/************************************************************************
* lib/math/lib_sinh.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double sinh(double x)
{
x = exp(x);
return ((x - (1.0 / x)) / 2.0);
}
#endif

42
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/************************************************************************
* lib/math/lib_sinhf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float sinhf(float x)
{
x = expf(x);
return ((x - (1.0 / x)) / 2.0);
}

47
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/************************************************************************
* lib/math/lib_sinhl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double sinhl(long double x)
{
x = expl(x);
return ((x - (1.0 / x)) / 2.0);
}
#endif

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/************************************************************************
* lib/math/lib_sinl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <math.h>
#ifdef CONFIG_HAVE_LONG_DOUBLE
/************************************************************************
* Private Data
************************************************************************/
static long double _ldbl_inv_fact[] =
{
1.0 / 1.0, // 1 / 1!
1.0 / 6.0, // 1 / 3!
1.0 / 120.0, // 1 / 5!
1.0 / 5040.0, // 1 / 7!
1.0 / 362880.0, // 1 / 9!
1.0 / 39916800.0, // 1 / 11!
1.0 / 6227020800.0, // 1 / 13!
1.0 / 1307674368000.0, // 1 / 15!
1.0 / 355687428096000.0, // 1 / 17!
1.0 / 121645100408832000.0, // 1 / 19!
};
/************************************************************************
* Public Functions
************************************************************************/
long double sinl(long double x)
{
long double x_squared;
long double sin_x;
size_t i;
/* Move x to [-pi, pi) */
x = fmodl(x, 2 * M_PI);
if (x >= M_PI)
{
x -= 2 * M_PI;
}
if (x < -M_PI)
{
x += 2 * M_PI;
}
/* Move x to [-pi/2, pi/2) */
if (x >= M_PI_2)
{
x = M_PI - x;
}
if (x < -M_PI_2)
{
x = -M_PI - x;
}
x_squared = x * x;
sin_x = 0.0;
/* Perform Taylor series approximation for sin(x) with ten terms */
for (i = 0; i < 10; i++)
{
if (i % 2 == 0)
{
sin_x += x * _ldbl_inv_fact[i];
}
else
{
sin_x -= x * _ldbl_inv_fact[i];
}
x *= x_squared;
}
return sin_x;
}
#endif

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/************************************************************************
* lib/math/lib_sqrt.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <errno.h>
#include "lib_internal.h"
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double sqrt(double x)
{
long double y, y1;
if (x < 0.0)
{
errno = EDOM;
return NAN;
}
if (isnan(x))
{
return NAN;
}
if (isinf(x))
{
return INFINITY;
}
if (x == 0.0)
{
return 0.0;
}
/* Guess square root (using bit manipulation) */
y = lib_sqrtapprox(x);
/* Perform four iterations of approximation. This number (4) is
* definitely optimal
*/
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
/* If guess was terribe (out of range of float). Repeat approximation
* until convergence.
*/
if (y * y < x - 1.0 || y * y > x + 1.0)
{
y1 = -1.0;
while (y != y1)
{
y1 = y;
y = 0.5 * (y + x / y);
}
}
return y;
}
#endif

84
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/************************************************************************
* lib/math/lib_sqrtf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <errno.h>
#include "lib_internal.h"
/************************************************************************
* Public Functions
************************************************************************/
float sqrtf(float x)
{
float y;
/* Filter out invalid/trivial inputs */
if (x < 0.0)
{
errno = EDOM;
return NAN;
}
if (isnan(x))
{
return NAN;
}
if (isinf(x))
{
return INFINITY;
}
if (x == 0.0)
{
return 0.0;
}
/* Guess square root (using bit manipulation) */
y = lib_sqrtapprox(x);
/* Perform three iterations of approximation. This number (3) is
* definitely optimal
*/
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
return y;
}

101
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/************************************************************************
* lib/math/lib_sqrtl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
#include <errno.h>
#include "lib_internal.h"
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double sqrtl(long double x)
{
long double y, y1;
/* Filter out invalid/trivial inputs */
if (x < 0.0)
{
errno = EDOM;
return NAN;
}
if (isnan(x))
{
return NAN;
}
if (isinf(x))
{
return INFINITY;
}
if (x == 0.0)
{
return 0.0;
}
/* Guess square root (using bit manipulation) */
y = lib_sqrtapprox(x);
/* Perform four iterations of approximation. This number (4) is
* definitely optimal
*/
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
y = 0.5 * (y + x / y);
/* If guess was terribe (out of range of float). Repeat approximation
* until convergence
*/
if (y * y < x - 1.0 || y * y > x + 1.0)
{
y1 = -1.0;
while (y != y1)
{
y1 = y;
y = 0.5 * (y + x / y);
}
}
return y;
}
#endif

46
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/************************************************************************
* lib/math/lib_tan.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double tan(double x)
{
return (sin(x) / cos(x));
}
#endif

41
nuttx/lib/math/lib_tanf.c Normal file
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/************************************************************************
* lib/math/lib_tanf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float tanf(float x)
{
return (sinf(x) / cosf(x));
}

49
nuttx/lib/math/lib_tanh.c Normal file
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/************************************************************************
* lib/math/lib_tanh.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_DOUBLE
double tanh(double x)
{
double x0 = exp(x);
double x1 = 1.0 / x0;
return ((x0 + x1) / (x0 - x1));
}
#endif

44
nuttx/lib/math/lib_tanhf.c Normal file
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/************************************************************************
* lib/math/lib_tanhf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
float tanhf(float x)
{
float x0 = expf(x);
float x1 = 1.0 / x0;
return ((x0 + x1) / (x0 - x1));
}

49
nuttx/lib/math/lib_tanhl.c Normal file
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/************************************************************************
* lib/math/lib_tanhl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double tanhl(long double x)
{
long double x0 = exp(x);
long double x1 = 1.0 / x0;
return ((x0 + x1) / (x0 - x1));
}
#endif

46
nuttx/lib/math/lib_tanl.c Normal file
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/************************************************************************
* lib/math/lib_tanl.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* It derives from the Rhombs OS math library by Nick Johnson which has
* a compatibile, MIT-style license:
*
* Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <math.h>
/************************************************************************
* Public Functions
************************************************************************/
#ifdef CONFIG_HAVE_LONG_DOUBLE
long double tanl(long double x)
{
return (sinl(x) / cosl(x));
}
#endif

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############################################################################
# lib/misc/Make.defs
#
# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Add the internal C files to the build
CSRCS += lib_init.c lib_filesem.c
# Add C files that depend on file OR socket descriptors
ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
CSRCS += lib_sendfile.c
ifneq ($(CONFIG_NFILE_STREAMS),0)
CSRCS += lib_streamsem.c
endif
else
ifneq ($(CONFIG_NSOCKET_DESCRIPTORS),0)
CSRCS += lib_sendfile.c
ifneq ($(CONFIG_NFILE_STREAMS),0)
CSRCS += lib_streamsem.c
endif
endif
endif
# Add the miscellaneous C files to the build
CSRCS += lib_match.c
CSRCS += lib_crc32.c
CSRCS += lib_dbg.c lib_dumpbuffer.c
# Add the misc directory to the build
DEPPATH += --dep-path misc
VPATH += :misc

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/************************************************************************************************
* lib/misc/lib_crc32.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.
*
* The logic in this file was developed by Gary S. Brown:
*
* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or code or tables
* extracted from it, as desired without restriction.
*
* First, the polynomial itself and its table of feedback terms. The polynomial is:
*
* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
*
* Note that we take it "backwards" and put the highest-order term in the lowest-order bit.
* The X^32 term is "implied"; the LSB is the X^31 term, etc. The X^0 term (usually shown
* as "+1") results in the MSB being 1
*
* Note that the usual hardware shift register implementation, which is what we're using
* (we're merely optimizing it by doing eight-bit chunks at a time) shifts bits into the
* lowest-order term. In our implementation, that means shifting towards the right. Why
* do we do it this way? Because the calculated CRC must be transmitted in order from
* highest-order term to lowest-order term. UARTs transmit characters in order from LSB
* to MSB. By storing the CRC this way we hand it to the UART in the order low-byte to
* high-byte; the UART sends each low-bit to hight-bit; and the result is transmission bit
* by bit from highest- to lowest-order term without requiring any bit shuffling on our
* part. Reception works similarly
*
* The feedback terms table consists of 256, 32-bit entries. Notes
*
* - The table can be generated at runtime if desired; code to do so is shown later. It
* might not be obvious, but the feedback terms simply represent the results of eight
* shift/xor operations for all combinations of data and CRC register values
*
* - The values must be right-shifted by eight bits by the updcrc logic; the shift must
* be u_(bring in zeroes). On some hardware you could probably optimize the shift in
* assembler by using byte-swap instructions polynomial $edb88320
************************************************************************************************/
/************************************************************************************************
* Included Files
************************************************************************************************/
#include <sys/types.h>
#include <stdint.h>
#include <crc32.h>
/************************************************************************************************
* Private Data
************************************************************************************************/
static const uint32_t crc32_tab[] =
{
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
/************************************************************************************************
* Public Functions
************************************************************************************************/
/************************************************************************************************
* Name: crc32part
*
* Description:
* Continue CRC calculation on a part of the buffer.
*
************************************************************************************************/
uint32_t crc32part(FAR const uint8_t *src, size_t len, uint32_t crc32val)
{
size_t i;
for (i = 0; i < len; i++)
{
crc32val = crc32_tab[(crc32val ^ src[i]) & 0xff] ^ (crc32val >> 8);
}
return crc32val;
}
/************************************************************************************************
* Name: crc32
*
* Description:
* Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
*
************************************************************************************************/
uint32_t crc32(FAR const uint8_t *src, size_t len)
{
return crc32part(src, len, 0);
}

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/****************************************************************************
* lib/misc/lib_dbg.c
*
* Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdarg.h>
#include <debug.h>
#include "lib_internal.h"
/****************************************************************************
* Global Variables
****************************************************************************/
/* Debug output is initially disabled */
#ifdef CONFIG_DEBUG_ENABLE
bool g_dbgenable;
#endif
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Name: dbg_enable
*
* Description:
* Enable or disable debug output.
*
****************************************************************************/
#ifdef CONFIG_DEBUG_ENABLE
void dbg_enable(bool enable)
{
g_dbgenable = enable;
}
#endif
/****************************************************************************
* Name: dbg, lldbg, vdbg
*
* Description:
* If the cross-compiler's pre-processor does not support variable
* length arguments, then these additional APIs will be built.
*
****************************************************************************/
#ifndef CONFIG_CPP_HAVE_VARARGS
#ifdef CONFIG_DEBUG
int dbg(const char *format, ...)
{
va_list ap;
int ret;
#ifdef CONFIG_DEBUG_ENABLE
ret = 0;
if (g_dbgenable)
#endif
{
va_start(ap, format);
ret = lib_rawvprintf(format, ap);
va_end(ap);
}
return ret;
}
#ifdef CONFIG_ARCH_LOWPUTC
int lldbg(const char *format, ...)
{
va_list ap;
int ret;
#ifdef CONFIG_DEBUG_ENABLE
ret = 0;
if (g_dbgenable)
#endif
{
va_start(ap, format);
ret = lib_lowvprintf(format, ap);
va_end(ap);
}
return ret;
}
#endif
#ifdef CONFIG_DEBUG_VERBOSE
int vdbg(const char *format, ...)
{
va_list ap;
int ret;
#ifdef CONFIG_DEBUG_ENABLE
ret = 0;
if (g_dbgenable)
#endif
{
va_start(ap, format);
ret = lib_rawvprintf(format, ap);
va_end(ap);
}
return ret;
}
#ifdef CONFIG_ARCH_LOWPUTC
int llvdbg(const char *format, ...)
{
va_list ap;
int ret;
#ifdef CONFIG_DEBUG_ENABLE
ret = 0;
if (g_dbgenable)
#endif
{
va_start(ap, format);
ret = lib_lowvprintf(format, ap);
va_end(ap);
}
return ret;
}
#endif /* CONFIG_ARCH_LOWPUTC */
#endif /* CONFIG_DEBUG_VERBOSE */
#endif /* CONFIG_DEBUG */
#endif /* CONFIG_CPP_HAVE_VARARGS */

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/****************************************************************************
* lib/misc/lib_dumpbuffer.c
*
* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <debug.h>
/****************************************************************************
* Pre-processor definitions
****************************************************************************/
/* Select the lowest level debug interface available */
#ifdef CONFIG_CPP_HAVE_VARARGS
# ifdef CONFIG_ARCH_LOWPUTC
# define message(format, arg...) lib_lowprintf(format, ##arg)
# else
# define message(format, arg...) lib_rawprintf(format, ##arg)
# endif
#else
# ifdef CONFIG_ARCH_LOWPUTC
# define message lib_lowprintf
# else
# define message lib_rawprintf
# endif
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lib_dumpbuffer
*
* Description:
* Do a pretty buffer dump
*
****************************************************************************/
void lib_dumpbuffer(FAR const char *msg, FAR const uint8_t *buffer, unsigned int buflen)
{
int i, j, k;
message("%s (%p):\n", msg, buffer);
for (i = 0; i < buflen; i += 32)
{
message("%04x: ", i);
for (j = 0; j < 32; j++)
{
k = i + j;
if (j == 16)
{
message(" ");
}
if (k < buflen)
{
message("%02x", buffer[k]);
}
else
{
message(" ");
}
}
message(" ");
for (j = 0; j < 32; j++)
{
k = i + j;
if (j == 16)
{
message(" ");
}
if (k < buflen)
{
if (buffer[k] >= 0x20 && buffer[k] < 0x7f)
{
message("%c", buffer[k]);
}
else
{
message(".");
}
}
}
message("\n");
}
}

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/************************************************************************
* lib/misc/lib_filesem.c
*
* Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <unistd.h>
#include <semaphore.h>
#include <errno.h>
#include <assert.h>
#include "lib_internal.h"
#if CONFIG_STDIO_BUFFER_SIZE > 0
/************************************************************************
* Pre-processor Definitions
************************************************************************/
/************************************************************************
* Private Data
************************************************************************/
/************************************************************************
* Global Functions
************************************************************************/
/************************************************************************
* lib_sem_initialize
************************************************************************/
void lib_sem_initialize(FAR struct file_struct *stream)
{
/* Initialize the LIB semaphore to one (to support one-at-
* a-time access to private data sets.
*/
(void)sem_init(&stream->fs_sem, 0, 1);
stream->fs_holder = -1;
stream->fs_counts = 0;
}
/************************************************************************
* lib_take_semaphore
************************************************************************/
void lib_take_semaphore(FAR struct file_struct *stream)
{
pid_t my_pid = getpid();
/* Do I already have the semaphore? */
if (stream->fs_holder == my_pid)
{
/* Yes, just increment the number of references that I have */
stream->fs_counts++;
}
else
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(&stream->fs_sem) != 0)
{
/* The only case that an error should occr here is if
* the wait was awakened by a signal.
*/
ASSERT(get_errno() == EINTR);
}
/* We have it. Claim the stak and return */
stream->fs_holder = my_pid;
stream->fs_counts = 1;
}
}
/************************************************************************
* lib_give_semaphore
************************************************************************/
void lib_give_semaphore(FAR struct file_struct *stream)
{
pid_t my_pid = getpid();
/* I better be holding at least one reference to the semaphore */
ASSERT(stream->fs_holder == my_pid);
/* Do I hold multiple references to the semphore */
if (stream->fs_counts > 1)
{
/* Yes, just release one count and return */
stream->fs_counts--;
}
else
{
/* Nope, this is the last reference I have */
stream->fs_holder = -1;
stream->fs_counts = 0;
ASSERT(sem_post(&stream->fs_sem) == 0);
}
}
#endif /* CONFIG_STDIO_BUFFER_SIZE */

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/************************************************************
* lib/misc/lib_init.c
*
* Copyright (C) 2007, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/lib.h>
#include "lib_internal.h"
/************************************************************
* Definitions
************************************************************/
/************************************************************
* Private Variables
************************************************************/
/************************************************************
* Private Functions
************************************************************/
/************************************************************
* Public Functions
************************************************************/
/************************************************************
* lib_initialize
************************************************************/
/* General library initialization hook */
void weak_const_function lib_initialize(void)
{
}
#if CONFIG_NFILE_STREAMS > 0
/* The following function is called when a new TCB is allocated. It
* creates the streamlist instance that is stored in the TCB.
*/
FAR struct streamlist *lib_alloclist(void)
{
FAR struct streamlist *list;
list = (FAR struct streamlist*)lib_zalloc(sizeof(struct streamlist));
if (list)
{
int i;
/* Start with a reference count of one */
list->sl_crefs = 1;
/* Initialize the list access mutex */
(void)sem_init(&list->sl_sem, 0, 1);
/* Initialize each FILE structure */
for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
{
/* Clear the IOB */
memset(&list->sl_streams[i], 0, sizeof(FILE));
/* Indicate not opened */
list->sl_streams[i].fs_filedes = -1;
/* Initialize the stream semaphore to one to support one-at-
* a-time access to private data sets.
*/
lib_sem_initialize(&list->sl_streams[i]);
}
}
return list;
}
/* This function is called when a TCB is closed (such as with
* pthread_create(). It increases the reference count on the stream
* list.
*/
void lib_addreflist(FAR struct streamlist *list)
{
if (list)
{
/* Increment the reference count on the list.
* NOTE: that we disable interrupts to do this
* (vs. taking the list semaphore). We do this
* because file cleanup operations often must be
* done from the IDLE task which cannot wait
* on semaphores.
*/
register irqstate_t flags = irqsave();
list->sl_crefs++;
irqrestore(flags);
}
}
/* this function is called when a TCB is destroyed. Note that is
* does not close the file by release this inode. This happens
* separately when the file descriptor list is freed.
*/
void lib_releaselist(FAR struct streamlist *list)
{
int crefs;
if (list)
{
/* Decrement the reference count on the list.
* NOTE: that we disable interrupts to do this
* (vs. taking the list semaphore). We do this
* because file cleanup operations often must be
* done from the IDLE task which cannot wait
* on semaphores.
*/
register irqstate_t flags = irqsave();
crefs = --(list->sl_crefs);
irqrestore(flags);
/* If the count decrements to zero, then there is no reference
* to the structure and it should be deallocated. Since there
* are references, it would be an error if any task still held
* a reference to the list's semaphore.
*/
if (crefs <= 0)
{
#if CONFIG_STDIO_BUFFER_SIZE > 0
int i;
#endif
/* Destroy the semaphore and release the filelist */
(void)sem_destroy(&list->sl_sem);
/* Release each stream in the list */
#if CONFIG_STDIO_BUFFER_SIZE > 0
for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
{
/* Destroy the semaphore that protects the IO buffer */
(void)sem_destroy(&list->sl_streams[i].fs_sem);
/* Release the IO buffer */
if (list->sl_streams[i].fs_bufstart)
{
sched_free(list->sl_streams[i].fs_bufstart);
}
}
#endif
/* Finally, release the list itself */
sched_free(list);
}
}
}
#endif /* CONFIG_NFILE_STREAMS */

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/****************************************************************************
* lib/misc/lib_match.c - simple shell-style filename matcher
*
* Simple shell-style filename pattern matcher written by Jef Poskanzer
* This pattern matcher only handles '?', '*' and '**', and multiple
* patterns separated by '|'.
*
* Copyright © 1995,2000 by Jef Poskanzer <jef@mail.acme.com>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <string.h>
#include <nuttx/regex.h>
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: match_one
*
* Description:
* Does all of the work for one '|' delimited pattern
*
* Returned Value:
* Returns 1 (match) or 0 (no-match).
*
****************************************************************************/
static int match_one(const char *pattern, int patlen, const char *string)
{
const char *p;
int pl;
int i;
for (p = pattern; p - pattern < patlen; p++, string++)
{
if (*p == '?' && *string != '\0')
{
continue;
}
if (*p == '*')
{
p++;
if (*p == '*')
{
/* Double-wildcard matches anything. */
p++;
i = strlen(string);
}
else
{
/* Single-wildcard matches anything but slash. */
i = strcspn(string, "/");
}
pl = patlen - (p - pattern);
for (; i >= 0; i--)
{
if (match_one(p, pl, &(string[i])))
{
return 1;
}
}
return 0;
}
if (*p != *string)
{
return 0;
}
}
if (*string == '\0')
{
return 1;
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: match
*
* Description:
* Simple shell-style filename pattern matcher written by Jef Poskanzer
* This pattern matcher only handles '?', '*' and '**', and multiple
* patterns separated by '|'.
*
* Returned Value:
* Returns 1 (match) or 0 (no-match).
*
****************************************************************************/
int match(const char *pattern, const char *string)
{
const char *or;
for (;;)
{
or = strchr(pattern, '|');
if (or == (char *)0)
{
return match_one(pattern, strlen(pattern), string);
}
if (match_one(pattern, or - pattern, string))
{
return 1;
}
pattern = or + 1;
}
}

297
nuttx/lib/misc/lib_sendfile.c Normal file
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/************************************************************************
* lib/misc/lib_streamsem.c
*
* Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <sys/sendfile.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#if CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0
/************************************************************************
* Private types
************************************************************************/
/************************************************************************
* Private Variables
************************************************************************/
/************************************************************************
* Public Variables
************************************************************************/
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: sendfile
*
* Description:
* sendfile() copies data between one file descriptor and another.
* sendfile() basically just wraps a sequence of reads() and writes()
* to perform a copy. It serves a purpose in systems where there is
* a penalty for copies to between user and kernal space, but really
* nothing in NuttX but provide some Linux compatible (and adding
* another 'almost standard' interface).
*
* NOTE: This interface is *not* specified in POSIX.1-2001, or other
* standards. The implementation here is very similar to the Linux
* sendfile interface. Other UNIX systems implement sendfile() with
* different semantics and prototypes. sendfile() should not be used
* in portable programs.
*
* Input Parmeters:
* infd - A file (or socket) descriptor opened for reading
* outfd - A descriptor opened for writing.
* offset - If 'offset' is not NULL, then it points to a variable
* holding the file offset from which sendfile() will start
* reading data from 'infd'. When sendfile() returns, this
* variable will be set to the offset of the byte following
* the last byte that was read. If 'offset' is not NULL,
* then sendfile() does not modify the current file offset of
* 'infd'; otherwise the current file offset is adjusted to
* reflect the number of bytes read from 'infd.'
*
* If 'offset' is NULL, then data will be read from 'infd'
* starting at the current file offset, and the file offset
* will be updated by the call.
* count - The number of bytes to copy between the file descriptors.
*
* Returned Value:
* If the transfer was successful, the number of bytes written to outfd is
* returned. On error, -1 is returned, and errno is set appropriately.
* There error values are those returned by read() or write() plus:
*
* EINVAL - Bad input parameters.
* ENOMEM - Could not allocated an I/O buffer
*
************************************************************************/
ssize_t sendfile(int outfd, int infd, off_t *offset, size_t count)
{
FAR uint8_t *iobuffer;
FAR uint8_t *wrbuffer;
off_t startpos = 0;
ssize_t nbytesread;
ssize_t nbyteswritten;
size_t ntransferred;
bool endxfr;
/* Get the current file position. */
if (offset)
{
/* Use lseek to get the current file position */
startpos = lseek(infd, 0, SEEK_CUR);
if (startpos == (off_t)-1)
{
return ERROR;
}
/* Use lseek again to set the new file position */
if (lseek(infd, *offset, SEEK_SET) == (off_t)-1)
{
return ERROR;
}
}
/* Allocate an I/O buffer */
iobuffer = (FAR void *)malloc(CONFIG_LIB_SENDFILE_BUFSIZE);
if (!iobuffer)
{
set_errno(ENOMEM);
return ERROR;
}
/* Now transfer 'count' bytes from the infd to the outfd */
for (ntransferred = 0, endxfr = false; ntransferred < count && !endxfr; )
{
/* Loop until the read side of the transfer comes to some conclusion */
do
{
/* Read a buffer of data from the infd */
nbytesread = read(infd, iobuffer, CONFIG_LIB_SENDFILE_BUFSIZE);
/* Check for end of file */
if (nbytesread == 0)
{
/* End of file. Break out and return current number of bytes
* transferred.
*/
endxfr = true;
break;
}
/* Check for a read ERROR. EINTR is a special case. This function
* should break out and return an error if EINTR is returned and
* no data has been transferred. But what should it do if some
* data has been transferred? I suppose just continue?
*/
else if (nbytesread < 0)
{
/* EINTR is not an error (but will still stop the copy) */
#ifndef CONFIG_DISABLE_SIGNALS
if (errno != EINTR || ntransferred == 0)
#endif
{
/* Read error. Break out and return the error condition. */
ntransferred = ERROR;
endxfr = true;
break;
}
}
}
while (nbytesread < 0);
/* Was anything read? */
if (!endxfr)
{
/* Yes.. Loop until the read side of the transfer comes to some
* conclusion.
*/
wrbuffer = iobuffer;
do
{
/* Write the buffer of data to the outfd */
nbyteswritten = write(outfd, wrbuffer, nbytesread);
/* Check for a complete (or parial) write. write() should not
* return zero.
*/
if (nbyteswritten >= 0)
{
/* Advance the buffer pointer and decrement the number of bytes
* remaining in the iobuffer. Typically, nbytesread will now
* be zero.
*/
wrbuffer += nbyteswritten;
nbytesread -= nbyteswritten;
/* Increment the total number of bytes successfully transferred. */
ntransferred += nbyteswritten;
}
/* Otherwise an error occurred */
else
{
/* Check for a read ERROR. EINTR is a special case. This
* function should break out and return an error if EINTR
* is returned and no data has been transferred. But what
* should it do if some data has been transferred? I
* suppose just continue?
*/
#ifndef CONFIG_DISABLE_SIGNALS
if (errno != EINTR || ntransferred == 0)
#endif
{
/* Write error. Break out and return the error condition */
ntransferred = ERROR;
endxfr = true;
break;
}
}
}
while (nbytesread > 0);
}
}
/* Release the I/O buffer */
free(iobuffer);
/* Return the current file position */
if (offset)
{
/* Use lseek to get the current file position */
off_t curpos = lseek(infd, 0, SEEK_CUR);
if (curpos == (off_t)-1)
{
return ERROR;
}
/* Return the current file position */
*offset = curpos;
/* Use lseek again to restore the original file position */
if (lseek(infd, startpos, SEEK_SET) == (off_t)-1)
{
return ERROR;
}
}
/* Finally return the number of bytes actually transferred (or ERROR
* if any failure occurred).
*/
return ntransferred;
}
#endif /* CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0 */

90
nuttx/lib/misc/lib_streamsem.c Normal file
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/************************************************************************
* lib/misc/lib_streamsem.c
*
* Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <semaphore.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include "lib_internal.h"
/************************************************************************
* Private types
************************************************************************/
/************************************************************************
* Private Variables
************************************************************************/
/************************************************************************
* Public Variables
************************************************************************/
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
void stream_semtake(FAR struct streamlist *list)
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(&list->sl_sem) != 0)
{
/* The only case that an error should occr here is if
* the wait was awakened by a signal.
*/
ASSERT(get_errno() == EINTR);
}
}
void stream_semgive(FAR struct streamlist *list)
{
sem_post(&list->sl_sem);
}

48
nuttx/lib/mqueue/Make.defs Normal file
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############################################################################
# lib/mqueue/Make.defs
#
# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
ifneq ($(CONFIG_DISABLE_MQUEUE),y)
# Add the mqueue C files to the build
CSRCS += mq_setattr.c mq_getattr.c
# Add the mqueue directory to the build
DEPPATH += --dep-path mqueue
VPATH += :mqueue
endif

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