cpython/Objects/floatobject.c

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1990-10-14 09:07:46 -03:00
/* Float object implementation */
1990-10-21 19:15:08 -03:00
/* XXX There should be overflow checks here, but it's hard to check
for any kind of float exception without losing portability. */
1997-05-02 00:12:38 -03:00
#include "Python.h"
#include "pycore_abstract.h" // _PyNumber_Index()
#include "pycore_dtoa.h" // _Py_dg_dtoa()
#include "pycore_floatobject.h" // _PyFloat_FormatAdvancedWriter()
#include "pycore_initconfig.h" // _PyStatus_OK()
#include "pycore_interp.h" // _PyInterpreterState.float_state
#include "pycore_long.h" // _PyLong_GetOne()
#include "pycore_modsupport.h" // _PyArg_NoKwnames()
#include "pycore_object.h" // _PyObject_Init(), _PyDebugAllocatorStats()
#include "pycore_pymath.h" // _PY_SHORT_FLOAT_REPR
#include "pycore_pystate.h" // _PyInterpreterState_GET()
#include "pycore_structseq.h" // _PyStructSequence_FiniBuiltin()
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#include <float.h> // DBL_MAX
#include <stdlib.h> // strtol()
1990-10-14 09:07:46 -03:00
/*[clinic input]
class float "PyObject *" "&PyFloat_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=dd0003f68f144284]*/
#include "clinic/floatobject.c.h"
#ifndef PyFloat_MAXFREELIST
# define PyFloat_MAXFREELIST 100
#endif
#if PyFloat_MAXFREELIST > 0
static struct _Py_float_state *
get_float_state(void)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
return &interp->float_state;
}
#endif
double
PyFloat_GetMax(void)
{
return DBL_MAX;
}
double
PyFloat_GetMin(void)
{
return DBL_MIN;
}
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
static PyTypeObject FloatInfoType;
PyDoc_STRVAR(floatinfo__doc__,
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r73376 | benjamin.peterson | 2009-06-11 17:29:23 -0500 (Thu, 11 Jun 2009) | 1 line remove check for case handled in sub-function ........ r73393 | alexandre.vassalotti | 2009-06-12 13:56:57 -0500 (Fri, 12 Jun 2009) | 2 lines Clear reference to the static PyExc_RecursionErrorInst in _PyExc_Fini. ........ r73398 | alexandre.vassalotti | 2009-06-12 15:57:12 -0500 (Fri, 12 Jun 2009) | 3 lines Add const qualifier to PyErr_SetFromErrnoWithFilename and to PyErr_SetFromErrnoWithUnicodeFilename. ........ r73400 | alexandre.vassalotti | 2009-06-12 16:43:47 -0500 (Fri, 12 Jun 2009) | 2 lines Delete outdated make file for building the parser with MSVC 6. ........ r73404 | benjamin.peterson | 2009-06-12 20:40:00 -0500 (Fri, 12 Jun 2009) | 1 line keep the slice.step field as NULL if no step expression is given ........ r73405 | benjamin.peterson | 2009-06-12 22:46:30 -0500 (Fri, 12 Jun 2009) | 1 line prevent import statements from assigning to None ........ r73409 | benjamin.peterson | 2009-06-13 08:06:21 -0500 (Sat, 13 Jun 2009) | 1 line allow importing from a module named None if it has an 'as' clause ........ r73419 | benjamin.peterson | 2009-06-13 11:19:19 -0500 (Sat, 13 Jun 2009) | 1 line set Print.values to NULL if there are no values ........ r73420 | benjamin.peterson | 2009-06-13 12:08:53 -0500 (Sat, 13 Jun 2009) | 1 line give a better error message when deleting () ........ r73421 | benjamin.peterson | 2009-06-13 15:23:33 -0500 (Sat, 13 Jun 2009) | 1 line when no module is given in a 'from' relative import, make ImportFrom.module NULL ........ r73432 | amaury.forgeotdarc | 2009-06-14 16:20:40 -0500 (Sun, 14 Jun 2009) | 3 lines #6227: Because of a wrong indentation, the test was not testing what it should. Ensure that the snippet in doctest_aliases actually contains aliases. ........ r73457 | benjamin.peterson | 2009-06-16 18:13:09 -0500 (Tue, 16 Jun 2009) | 1 line add underscores ........ r73460 | benjamin.peterson | 2009-06-16 22:23:04 -0500 (Tue, 16 Jun 2009) | 1 line remove unused 'encoding' member from the compiler struct ........ r73485 | benjamin.peterson | 2009-06-19 17:07:47 -0500 (Fri, 19 Jun 2009) | 1 line remove duplicate test ........ r73486 | benjamin.peterson | 2009-06-19 17:09:17 -0500 (Fri, 19 Jun 2009) | 1 line add missing assertion #6313 ........ r73488 | benjamin.peterson | 2009-06-19 17:16:28 -0500 (Fri, 19 Jun 2009) | 1 line show that this one isn't used ........ r73489 | benjamin.peterson | 2009-06-19 17:21:12 -0500 (Fri, 19 Jun 2009) | 1 line use closures ........ r73501 | benjamin.peterson | 2009-06-21 18:01:07 -0500 (Sun, 21 Jun 2009) | 1 line don't need to add the name 'lambda' as assigned ........ r73502 | benjamin.peterson | 2009-06-21 18:03:36 -0500 (Sun, 21 Jun 2009) | 1 line remove tmpname support since it's no longer used ........ r73513 | benjamin.peterson | 2009-06-22 20:18:57 -0500 (Mon, 22 Jun 2009) | 1 line fix grammar ........ r73514 | benjamin.peterson | 2009-06-22 22:01:56 -0500 (Mon, 22 Jun 2009) | 1 line remove some unused symtable constants ........
2009-06-28 16:19:51 -03:00
"sys.float_info\n\
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
\n\
A named tuple holding information about the float type. It contains low level\n\
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
information about the precision and internal representation. Please study\n\
your system's :file:`float.h` for more information.");
static PyStructSequence_Field floatinfo_fields[] = {
{"max", "DBL_MAX -- maximum representable finite float"},
{"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
"is representable"},
{"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
"is representable"},
{"min", "DBL_MIN -- Minimum positive normalized float"},
{"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
"is a normalized float"},
{"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
"a normalized float"},
{"dig", "DBL_DIG -- maximum number of decimal digits that "
"can be faithfully represented in a float"},
{"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
{"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
"representable float"},
{"radix", "FLT_RADIX -- radix of exponent"},
{"rounds", "FLT_ROUNDS -- rounding mode used for arithmetic "
"operations"},
{0}
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
};
static PyStructSequence_Desc floatinfo_desc = {
"sys.float_info", /* name */
floatinfo__doc__, /* doc */
floatinfo_fields, /* fields */
11
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
};
PyObject *
PyFloat_GetInfo(void)
{
PyObject* floatinfo;
int pos = 0;
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
floatinfo = PyStructSequence_New(&FloatInfoType);
if (floatinfo == NULL) {
return NULL;
}
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
#define SetIntFlag(flag) \
PyStructSequence_SET_ITEM(floatinfo, pos++, PyLong_FromLong(flag))
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
#define SetDblFlag(flag) \
PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
SetDblFlag(DBL_MAX);
SetIntFlag(DBL_MAX_EXP);
SetIntFlag(DBL_MAX_10_EXP);
SetDblFlag(DBL_MIN);
SetIntFlag(DBL_MIN_EXP);
SetIntFlag(DBL_MIN_10_EXP);
SetIntFlag(DBL_DIG);
SetIntFlag(DBL_MANT_DIG);
SetDblFlag(DBL_EPSILON);
SetIntFlag(FLT_RADIX);
SetIntFlag(FLT_ROUNDS);
Merged revisions 59933-59951 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59935 | raymond.hettinger | 2008-01-13 07:15:15 +0100 (Sun, 13 Jan 2008) | 1 line Named tuple is a concept, not a specific type. ........ r59936 | raymond.hettinger | 2008-01-13 07:18:07 +0100 (Sun, 13 Jan 2008) | 1 line Fix spelling. ........ r59937 | georg.brandl | 2008-01-13 10:36:18 +0100 (Sun, 13 Jan 2008) | 2 lines Clarify the effect of text mode. ........ r59938 | thomas.heller | 2008-01-13 12:19:43 +0100 (Sun, 13 Jan 2008) | 1 line Make Modules/socketobject.c compile for Windows again. ........ r59939 | ka-ping.yee | 2008-01-13 12:25:13 +0100 (Sun, 13 Jan 2008) | 9 lines Check in the patch proposed by Ben Hayden (benjhayden) for issue #1550: help('modules') broken by several 3rd party libraries. Tested with Python build: trunk:54235:59936M -- the reported error occurs with Django installed (or with any __init__.py present on the path that raises an exception), and such errors indeed go away when this change is applied. ........ r59940 | georg.brandl | 2008-01-13 16:04:05 +0100 (Sun, 13 Jan 2008) | 2 lines Back out r59931 - test_ctypes fails with it. ........ r59943 | amaury.forgeotdarc | 2008-01-14 01:22:44 +0100 (Mon, 14 Jan 2008) | 6 lines As discussed in issue 1700288: ctypes takes some liberties when creating python types: it modifies the types' __dict__ directly, bypassing all the machinery of type objects which deal with special methods. And this broke recent optimisations of method lookup. Now we try to modify the type with more "official" functions. ........ r59944 | amaury.forgeotdarc | 2008-01-14 01:29:41 +0100 (Mon, 14 Jan 2008) | 5 lines Re-apply patch #1700288 (first applied in r59931, rolled back in r59940) now that ctypes uses a more supported method to create types: Method cache optimization, by Armin Rigo, ported to 2.6 by Kevin Jacobs. ........ r59946 | amaury.forgeotdarc | 2008-01-14 02:07:27 +0100 (Mon, 14 Jan 2008) | 4 lines ?Why did my tests not notice this before? Slots inheritance is very different from OO inheritance. This code lead to infinite recursion on classes derived from StructType. ........ r59947 | christian.heimes | 2008-01-14 04:33:52 +0100 (Mon, 14 Jan 2008) | 1 line Added new an better structseq representation. E.g. repr(time.gmtime(0)) now returns 'time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)' instead of '(1970, 1, 1, 0, 0, 0, 3, 1, 0)'. The feature is part of #1816: sys.flags ........ r59948 | christian.heimes | 2008-01-14 04:35:38 +0100 (Mon, 14 Jan 2008) | 1 line I missed the most important file ........ r59949 | christian.heimes | 2008-01-14 04:42:48 +0100 (Mon, 14 Jan 2008) | 1 line Applied patch #1816: sys.flags patch ........ r59950 | christian.heimes | 2008-01-14 05:13:37 +0100 (Mon, 14 Jan 2008) | 2 lines Now that I've learnt about structseq objects I felt like converting sys.float_info to a structseq. It's readonly and help(sys.float_info) explains the attributes nicely. ........ r59951 | christian.heimes | 2008-01-14 07:06:19 +0100 (Mon, 14 Jan 2008) | 1 line Added more comments to the new structseq repr code and implemented several of Neal's suggestions. ........
2008-01-14 14:49:24 -04:00
#undef SetIntFlag
#undef SetDblFlag
if (PyErr_Occurred()) {
Py_CLEAR(floatinfo);
return NULL;
}
return floatinfo;
}
1997-05-02 00:12:38 -03:00
PyObject *
PyFloat_FromDouble(double fval)
1990-10-14 09:07:46 -03:00
{
PyFloatObject *op;
#if PyFloat_MAXFREELIST > 0
struct _Py_float_state *state = get_float_state();
op = state->free_list;
if (op != NULL) {
#ifdef Py_DEBUG
// PyFloat_FromDouble() must not be called after _PyFloat_Fini()
assert(state->numfree != -1);
#endif
state->free_list = (PyFloatObject *) Py_TYPE(op);
state->numfree--;
OBJECT_STAT_INC(from_freelist);
}
else
#endif
{
op = PyObject_Malloc(sizeof(PyFloatObject));
if (!op) {
return PyErr_NoMemory();
}
}
_PyObject_Init((PyObject*)op, &PyFloat_Type);
op->ob_fval = fval;
return (PyObject *) op;
1990-10-14 09:07:46 -03:00
}
static PyObject *
float_from_string_inner(const char *s, Py_ssize_t len, void *obj)
{
double x;
const char *end;
const char *last = s + len;
/* strip leading whitespace */
while (s < last && Py_ISSPACE(*s)) {
s++;
}
if (s == last) {
PyErr_Format(PyExc_ValueError,
"could not convert string to float: "
"%R", obj);
return NULL;
}
/* strip trailing whitespace */
while (s < last - 1 && Py_ISSPACE(last[-1])) {
last--;
}
/* We don't care about overflow or underflow. If the platform
* supports them, infinities and signed zeroes (on underflow) are
* fine. */
x = PyOS_string_to_double(s, (char **)&end, NULL);
if (end != last) {
PyErr_Format(PyExc_ValueError,
"could not convert string to float: "
"%R", obj);
return NULL;
}
else if (x == -1.0 && PyErr_Occurred()) {
return NULL;
}
else {
return PyFloat_FromDouble(x);
}
}
PyObject *
PyFloat_FromString(PyObject *v)
{
const char *s;
PyObject *s_buffer = NULL;
Py_ssize_t len;
Py_buffer view = {NULL, NULL};
PyObject *result = NULL;
if (PyUnicode_Check(v)) {
2011-09-28 02:41:54 -03:00
s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
if (s_buffer == NULL)
return NULL;
assert(PyUnicode_IS_ASCII(s_buffer));
/* Simply get a pointer to existing ASCII characters. */
2011-09-28 02:41:54 -03:00
s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
assert(s != NULL);
}
else if (PyBytes_Check(v)) {
s = PyBytes_AS_STRING(v);
len = PyBytes_GET_SIZE(v);
}
else if (PyByteArray_Check(v)) {
s = PyByteArray_AS_STRING(v);
len = PyByteArray_GET_SIZE(v);
}
else if (PyObject_GetBuffer(v, &view, PyBUF_SIMPLE) == 0) {
s = (const char *)view.buf;
len = view.len;
/* Copy to NUL-terminated buffer. */
s_buffer = PyBytes_FromStringAndSize(s, len);
if (s_buffer == NULL) {
PyBuffer_Release(&view);
return NULL;
}
s = PyBytes_AS_STRING(s_buffer);
}
else {
PyErr_Format(PyExc_TypeError,
"float() argument must be a string or a real number, not '%.200s'",
Py_TYPE(v)->tp_name);
return NULL;
}
result = _Py_string_to_number_with_underscores(s, len, "float", v, v,
float_from_string_inner);
PyBuffer_Release(&view);
Py_XDECREF(s_buffer);
return result;
}
void
_PyFloat_ExactDealloc(PyObject *obj)
1992-03-27 13:28:44 -04:00
{
assert(PyFloat_CheckExact(obj));
PyFloatObject *op = (PyFloatObject *)obj;
#if PyFloat_MAXFREELIST > 0
struct _Py_float_state *state = get_float_state();
#ifdef Py_DEBUG
// float_dealloc() must not be called after _PyFloat_Fini()
assert(state->numfree != -1);
#endif
if (state->numfree >= PyFloat_MAXFREELIST) {
PyObject_Free(op);
return;
}
state->numfree++;
Py_SET_TYPE(op, (PyTypeObject *)state->free_list);
state->free_list = op;
OBJECT_STAT_INC(to_freelist);
#else
PyObject_Free(op);
#endif
}
static void
float_dealloc(PyObject *op)
{
assert(PyFloat_Check(op));
#if PyFloat_MAXFREELIST > 0
if (PyFloat_CheckExact(op)) {
_PyFloat_ExactDealloc(op);
}
else
#endif
{
Py_TYPE(op)->tp_free(op);
}
1992-03-27 13:28:44 -04:00
}
1990-10-14 09:07:46 -03:00
double
2000-07-09 02:02:18 -03:00
PyFloat_AsDouble(PyObject *op)
1990-10-14 09:07:46 -03:00
{
PyNumberMethods *nb;
PyObject *res;
double val;
if (op == NULL) {
PyErr_BadArgument();
return -1;
}
if (PyFloat_Check(op)) {
return PyFloat_AS_DOUBLE(op);
}
nb = Py_TYPE(op)->tp_as_number;
if (nb == NULL || nb->nb_float == NULL) {
if (nb && nb->nb_index) {
PyObject *res = _PyNumber_Index(op);
if (!res) {
return -1;
}
double val = PyLong_AsDouble(res);
Py_DECREF(res);
return val;
}
PyErr_Format(PyExc_TypeError, "must be real number, not %.50s",
Py_TYPE(op)->tp_name);
return -1;
}
res = (*nb->nb_float) (op);
if (res == NULL) {
return -1;
}
if (!PyFloat_CheckExact(res)) {
if (!PyFloat_Check(res)) {
PyErr_Format(PyExc_TypeError,
"%.50s.__float__ returned non-float (type %.50s)",
Py_TYPE(op)->tp_name, Py_TYPE(res)->tp_name);
Py_DECREF(res);
return -1;
}
if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
"%.50s.__float__ returned non-float (type %.50s). "
"The ability to return an instance of a strict subclass of float "
"is deprecated, and may be removed in a future version of Python.",
Py_TYPE(op)->tp_name, Py_TYPE(res)->tp_name)) {
Py_DECREF(res);
return -1;
}
}
val = PyFloat_AS_DOUBLE(res);
Py_DECREF(res);
return val;
1990-10-14 09:07:46 -03:00
}
2001-01-03 21:44:34 -04:00
/* Macro and helper that convert PyObject obj to a C double and store
the value in dbl. If conversion to double raises an exception, obj is
set to NULL, and the function invoking this macro returns NULL. If
obj is not of float or int type, Py_NotImplemented is incref'ed,
stored in obj, and returned from the function invoking this macro.
*/
#define CONVERT_TO_DOUBLE(obj, dbl) \
if (PyFloat_Check(obj)) \
dbl = PyFloat_AS_DOUBLE(obj); \
else if (convert_to_double(&(obj), &(dbl)) < 0) \
return obj;
2001-01-03 21:44:34 -04:00
/* Methods */
2001-01-03 21:44:34 -04:00
static int
convert_to_double(PyObject **v, double *dbl)
2001-01-03 21:44:34 -04:00
{
PyObject *obj = *v;
if (PyLong_Check(obj)) {
*dbl = PyLong_AsDouble(obj);
if (*dbl == -1.0 && PyErr_Occurred()) {
*v = NULL;
return -1;
}
}
else {
*v = Py_NewRef(Py_NotImplemented);
return -1;
}
return 0;
2001-01-03 21:44:34 -04:00
}
static PyObject *
float_repr(PyFloatObject *v)
{
PyObject *result;
char *buf;
buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
'r', 0,
Py_DTSF_ADD_DOT_0,
NULL);
if (!buf)
return PyErr_NoMemory();
result = _PyUnicode_FromASCII(buf, strlen(buf));
PyMem_Free(buf);
return result;
}
/* Comparison is pretty much a nightmare. When comparing float to float,
* we do it as straightforwardly (and long-windedly) as conceivable, so
* that, e.g., Python x == y delivers the same result as the platform
* C x == y when x and/or y is a NaN.
* When mixing float with an integer type, there's no good *uniform* approach.
* Converting the double to an integer obviously doesn't work, since we
* may lose info from fractional bits. Converting the integer to a double
* also has two failure modes: (1) an int may trigger overflow (too
* large to fit in the dynamic range of a C double); (2) even a C long may have
* more bits than fit in a C double (e.g., on a 64-bit box long may have
* 63 bits of precision, but a C double probably has only 53), and then
* we can falsely claim equality when low-order integer bits are lost by
* coercion to double. So this part is painful too.
*/
static PyObject*
float_richcompare(PyObject *v, PyObject *w, int op)
{
double i, j;
int r = 0;
assert(PyFloat_Check(v));
i = PyFloat_AS_DOUBLE(v);
/* Switch on the type of w. Set i and j to doubles to be compared,
* and op to the richcomp to use.
*/
if (PyFloat_Check(w))
j = PyFloat_AS_DOUBLE(w);
else if (!Py_IS_FINITE(i)) {
if (PyLong_Check(w))
/* If i is an infinity, its magnitude exceeds any
* finite integer, so it doesn't matter which int we
* compare i with. If i is a NaN, similarly.
*/
j = 0.0;
else
goto Unimplemented;
}
else if (PyLong_Check(w)) {
int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
int wsign = _PyLong_Sign(w);
size_t nbits;
int exponent;
if (vsign != wsign) {
/* Magnitudes are irrelevant -- the signs alone
* determine the outcome.
*/
i = (double)vsign;
j = (double)wsign;
goto Compare;
}
/* The signs are the same. */
/* Convert w to a double if it fits. In particular, 0 fits. */
nbits = _PyLong_NumBits(w);
if (nbits == (size_t)-1 && PyErr_Occurred()) {
/* This long is so large that size_t isn't big enough
* to hold the # of bits. Replace with little doubles
* that give the same outcome -- w is so large that
* its magnitude must exceed the magnitude of any
* finite float.
*/
PyErr_Clear();
i = (double)vsign;
assert(wsign != 0);
j = wsign * 2.0;
goto Compare;
}
if (nbits <= 48) {
j = PyLong_AsDouble(w);
/* It's impossible that <= 48 bits overflowed. */
assert(j != -1.0 || ! PyErr_Occurred());
goto Compare;
}
assert(wsign != 0); /* else nbits was 0 */
assert(vsign != 0); /* if vsign were 0, then since wsign is
* not 0, we would have taken the
* vsign != wsign branch at the start */
/* We want to work with non-negative numbers. */
if (vsign < 0) {
/* "Multiply both sides" by -1; this also swaps the
* comparator.
*/
i = -i;
op = _Py_SwappedOp[op];
}
assert(i > 0.0);
(void) frexp(i, &exponent);
/* exponent is the # of bits in v before the radix point;
* we know that nbits (the # of bits in w) > 48 at this point
*/
if (exponent < 0 || (size_t)exponent < nbits) {
i = 1.0;
j = 2.0;
goto Compare;
}
if ((size_t)exponent > nbits) {
i = 2.0;
j = 1.0;
goto Compare;
}
/* v and w have the same number of bits before the radix
* point. Construct two ints that have the same comparison
* outcome.
*/
{
double fracpart;
double intpart;
PyObject *result = NULL;
PyObject *vv = NULL;
PyObject *ww = w;
if (wsign < 0) {
ww = PyNumber_Negative(w);
if (ww == NULL)
goto Error;
}
else
Py_INCREF(ww);
fracpart = modf(i, &intpart);
vv = PyLong_FromDouble(intpart);
if (vv == NULL)
goto Error;
if (fracpart != 0.0) {
/* Shift left, and or a 1 bit into vv
* to represent the lost fraction.
*/
PyObject *temp;
temp = _PyLong_Lshift(ww, 1);
if (temp == NULL)
goto Error;
Py_SETREF(ww, temp);
temp = _PyLong_Lshift(vv, 1);
if (temp == NULL)
goto Error;
Py_SETREF(vv, temp);
temp = PyNumber_Or(vv, _PyLong_GetOne());
if (temp == NULL)
goto Error;
Py_SETREF(vv, temp);
}
r = PyObject_RichCompareBool(vv, ww, op);
if (r < 0)
goto Error;
result = PyBool_FromLong(r);
Error:
Py_XDECREF(vv);
Py_XDECREF(ww);
return result;
}
} /* else if (PyLong_Check(w)) */
else /* w isn't float or int */
goto Unimplemented;
Compare:
switch (op) {
case Py_EQ:
r = i == j;
break;
case Py_NE:
r = i != j;
break;
case Py_LE:
r = i <= j;
break;
case Py_GE:
r = i >= j;
break;
case Py_LT:
r = i < j;
break;
case Py_GT:
r = i > j;
break;
}
return PyBool_FromLong(r);
Unimplemented:
Py_RETURN_NOTIMPLEMENTED;
}
static Py_hash_t
2000-07-09 02:02:18 -03:00
float_hash(PyFloatObject *v)
{
return _Py_HashDouble((PyObject *)v, v->ob_fval);
}
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_add(PyObject *v, PyObject *w)
1990-10-14 09:07:46 -03:00
{
double a,b;
CONVERT_TO_DOUBLE(v, a);
CONVERT_TO_DOUBLE(w, b);
a = a + b;
return PyFloat_FromDouble(a);
1990-10-14 09:07:46 -03:00
}
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_sub(PyObject *v, PyObject *w)
1990-10-14 09:07:46 -03:00
{
double a,b;
CONVERT_TO_DOUBLE(v, a);
CONVERT_TO_DOUBLE(w, b);
a = a - b;
return PyFloat_FromDouble(a);
1990-10-14 09:07:46 -03:00
}
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_mul(PyObject *v, PyObject *w)
1990-10-14 09:07:46 -03:00
{
double a,b;
CONVERT_TO_DOUBLE(v, a);
CONVERT_TO_DOUBLE(w, b);
a = a * b;
return PyFloat_FromDouble(a);
1990-10-14 09:07:46 -03:00
}
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_div(PyObject *v, PyObject *w)
1990-10-14 09:07:46 -03:00
{
double a,b;
CONVERT_TO_DOUBLE(v, a);
CONVERT_TO_DOUBLE(w, b);
if (b == 0.0) {
PyErr_SetString(PyExc_ZeroDivisionError,
"float division by zero");
return NULL;
}
a = a / b;
return PyFloat_FromDouble(a);
1990-10-14 09:07:46 -03:00
}
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_rem(PyObject *v, PyObject *w)
1990-10-14 09:07:46 -03:00
{
double vx, wx;
double mod;
CONVERT_TO_DOUBLE(v, vx);
CONVERT_TO_DOUBLE(w, wx);
if (wx == 0.0) {
PyErr_SetString(PyExc_ZeroDivisionError,
"float modulo");
return NULL;
}
mod = fmod(vx, wx);
if (mod) {
/* ensure the remainder has the same sign as the denominator */
if ((wx < 0) != (mod < 0)) {
mod += wx;
}
}
else {
/* the remainder is zero, and in the presence of signed zeroes
fmod returns different results across platforms; ensure
it has the same sign as the denominator. */
mod = copysign(0.0, wx);
}
return PyFloat_FromDouble(mod);
1990-10-14 09:07:46 -03:00
}
static void
_float_div_mod(double vx, double wx, double *floordiv, double *mod)
{
double div;
*mod = fmod(vx, wx);
/* fmod is typically exact, so vx-mod is *mathematically* an
exact multiple of wx. But this is fp arithmetic, and fp
vx - mod is an approximation; the result is that div may
not be an exact integral value after the division, although
it will always be very close to one.
*/
div = (vx - *mod) / wx;
if (*mod) {
/* ensure the remainder has the same sign as the denominator */
if ((wx < 0) != (*mod < 0)) {
*mod += wx;
div -= 1.0;
}
}
else {
/* the remainder is zero, and in the presence of signed zeroes
fmod returns different results across platforms; ensure
it has the same sign as the denominator. */
*mod = copysign(0.0, wx);
}
/* snap quotient to nearest integral value */
if (div) {
*floordiv = floor(div);
if (div - *floordiv > 0.5) {
*floordiv += 1.0;
}
}
else {
/* div is zero - get the same sign as the true quotient */
*floordiv = copysign(0.0, vx / wx); /* zero w/ sign of vx/wx */
}
}
static PyObject *
float_divmod(PyObject *v, PyObject *w)
{
double vx, wx;
double mod, floordiv;
CONVERT_TO_DOUBLE(v, vx);
CONVERT_TO_DOUBLE(w, wx);
if (wx == 0.0) {
PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
return NULL;
}
_float_div_mod(vx, wx, &floordiv, &mod);
return Py_BuildValue("(dd)", floordiv, mod);
}
static PyObject *
float_floor_div(PyObject *v, PyObject *w)
{
double vx, wx;
double mod, floordiv;
CONVERT_TO_DOUBLE(v, vx);
CONVERT_TO_DOUBLE(w, wx);
if (wx == 0.0) {
PyErr_SetString(PyExc_ZeroDivisionError, "float floor division by zero");
return NULL;
}
_float_div_mod(vx, wx, &floordiv, &mod);
return PyFloat_FromDouble(floordiv);
}
/* determine whether x is an odd integer or not; assumes that
x is not an infinity or nan. */
#define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
1997-05-02 00:12:38 -03:00
static PyObject *
2001-01-03 21:44:34 -04:00
float_pow(PyObject *v, PyObject *w, PyObject *z)
1990-10-14 09:07:46 -03:00
{
double iv, iw, ix;
int negate_result = 0;
if ((PyObject *)z != Py_None) {
PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
"allowed unless all arguments are integers");
return NULL;
}
CONVERT_TO_DOUBLE(v, iv);
CONVERT_TO_DOUBLE(w, iw);
/* Sort out special cases here instead of relying on pow() */
if (iw == 0) { /* v**0 is 1, even 0**0 */
return PyFloat_FromDouble(1.0);
}
if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
return PyFloat_FromDouble(iv);
}
if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
}
if (Py_IS_INFINITY(iw)) {
/* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
* abs(v) > 1 (including case where v infinite)
*
* v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
* abs(v) > 1 (including case where v infinite)
*/
iv = fabs(iv);
if (iv == 1.0)
return PyFloat_FromDouble(1.0);
else if ((iw > 0.0) == (iv > 1.0))
return PyFloat_FromDouble(fabs(iw)); /* return inf */
else
return PyFloat_FromDouble(0.0);
}
if (Py_IS_INFINITY(iv)) {
/* (+-inf)**w is: inf for w positive, 0 for w negative; in
* both cases, we need to add the appropriate sign if w is
* an odd integer.
*/
int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
if (iw > 0.0)
return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
else
return PyFloat_FromDouble(iw_is_odd ?
copysign(0.0, iv) : 0.0);
}
if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
(already dealt with above), and an error
if w is negative. */
int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
if (iw < 0.0) {
PyErr_SetString(PyExc_ZeroDivisionError,
"0.0 cannot be raised to a "
"negative power");
return NULL;
}
/* use correct sign if iw is odd */
return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
}
if (iv < 0.0) {
/* Whether this is an error is a mess, and bumps into libm
* bugs so we have to figure it out ourselves.
*/
if (iw != floor(iw)) {
/* Negative numbers raised to fractional powers
* become complex.
*/
return PyComplex_Type.tp_as_number->nb_power(v, w, z);
}
/* iw is an exact integer, albeit perhaps a very large
* one. Replace iv by its absolute value and remember
* to negate the pow result if iw is odd.
*/
iv = -iv;
negate_result = DOUBLE_IS_ODD_INTEGER(iw);
}
if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
/* (-1) ** large_integer also ends up here. Here's an
* extract from the comments for the previous
* implementation explaining why this special case is
* necessary:
*
* -1 raised to an exact integer should never be exceptional.
* Alas, some libms (chiefly glibc as of early 2003) return
* NaN and set EDOM on pow(-1, large_int) if the int doesn't
* happen to be representable in a *C* integer. That's a
* bug.
*/
return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
}
/* Now iv and iw are finite, iw is nonzero, and iv is
* positive and not equal to 1.0. We finally allow
* the platform pow to step in and do the rest.
*/
errno = 0;
ix = pow(iv, iw);
_Py_ADJUST_ERANGE1(ix);
if (negate_result)
ix = -ix;
if (errno != 0) {
/* We don't expect any errno value other than ERANGE, but
* the range of libm bugs appears unbounded.
*/
PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
PyExc_ValueError);
return NULL;
}
return PyFloat_FromDouble(ix);
1990-10-14 09:07:46 -03:00
}
#undef DOUBLE_IS_ODD_INTEGER
1997-05-02 00:12:38 -03:00
static PyObject *
2000-07-09 02:02:18 -03:00
float_neg(PyFloatObject *v)
1990-10-14 09:07:46 -03:00
{
return PyFloat_FromDouble(-v->ob_fval);
1990-10-14 09:07:46 -03:00
}
1997-05-02 00:12:38 -03:00
static PyObject *
2000-07-09 02:02:18 -03:00
float_abs(PyFloatObject *v)
{
return PyFloat_FromDouble(fabs(v->ob_fval));
1990-10-14 09:07:46 -03:00
}
1991-05-14 08:57:01 -03:00
static int
float_bool(PyFloatObject *v)
1991-05-14 08:57:01 -03:00
{
return v->ob_fval != 0.0;
1991-05-14 08:57:01 -03:00
}
/*[clinic input]
float.is_integer
Return True if the float is an integer.
[clinic start generated code]*/
static PyObject *
float_is_integer_impl(PyObject *self)
/*[clinic end generated code: output=7112acf95a4d31ea input=311810d3f777e10d]*/
{
double x = PyFloat_AsDouble(self);
PyObject *o;
if (x == -1.0 && PyErr_Occurred())
return NULL;
if (!Py_IS_FINITE(x))
Py_RETURN_FALSE;
errno = 0;
o = (floor(x) == x) ? Py_True : Py_False;
if (errno != 0) {
PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
PyExc_ValueError);
return NULL;
}
return Py_NewRef(o);
}
/*[clinic input]
float.__trunc__
Return the Integral closest to x between 0 and x.
[clinic start generated code]*/
static PyObject *
float___trunc___impl(PyObject *self)
/*[clinic end generated code: output=dd3e289dd4c6b538 input=591b9ba0d650fdff]*/
{
return PyLong_FromDouble(PyFloat_AS_DOUBLE(self));
}
/*[clinic input]
float.__floor__
Return the floor as an Integral.
[clinic start generated code]*/
static PyObject *
float___floor___impl(PyObject *self)
/*[clinic end generated code: output=e0551dbaea8c01d1 input=77bb13eb12e268df]*/
{
double x = PyFloat_AS_DOUBLE(self);
return PyLong_FromDouble(floor(x));
}
/*[clinic input]
float.__ceil__
Return the ceiling as an Integral.
[clinic start generated code]*/
static PyObject *
float___ceil___impl(PyObject *self)
/*[clinic end generated code: output=a2fd8858f73736f9 input=79e41ae94aa0a516]*/
{
double x = PyFloat_AS_DOUBLE(self);
return PyLong_FromDouble(ceil(x));
}
/* double_round: rounds a finite double to the closest multiple of
10**-ndigits; here ndigits is within reasonable bounds (typically, -308 <=
ndigits <= 323). Returns a Python float, or sets a Python error and
returns NULL on failure (OverflowError and memory errors are possible). */
#if _PY_SHORT_FLOAT_REPR == 1
/* version of double_round that uses the correctly-rounded string<->double
conversions from Python/dtoa.c */
static PyObject *
double_round(double x, int ndigits) {
double rounded;
Py_ssize_t buflen, mybuflen=100;
char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
int decpt, sign;
PyObject *result = NULL;
_Py_SET_53BIT_PRECISION_HEADER;
/* round to a decimal string */
_Py_SET_53BIT_PRECISION_START;
buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);
_Py_SET_53BIT_PRECISION_END;
if (buf == NULL) {
PyErr_NoMemory();
return NULL;
}
/* Get new buffer if shortbuf is too small. Space needed <= buf_end -
buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
buflen = buf_end - buf;
if (buflen + 8 > mybuflen) {
mybuflen = buflen+8;
mybuf = (char *)PyMem_Malloc(mybuflen);
if (mybuf == NULL) {
PyErr_NoMemory();
goto exit;
}
}
/* copy buf to mybuf, adding exponent, sign and leading 0 */
PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
buf, decpt - (int)buflen);
/* and convert the resulting string back to a double */
errno = 0;
_Py_SET_53BIT_PRECISION_START;
rounded = _Py_dg_strtod(mybuf, NULL);
_Py_SET_53BIT_PRECISION_END;
if (errno == ERANGE && fabs(rounded) >= 1.)
PyErr_SetString(PyExc_OverflowError,
"rounded value too large to represent");
else
result = PyFloat_FromDouble(rounded);
/* done computing value; now clean up */
if (mybuf != shortbuf)
PyMem_Free(mybuf);
exit:
_Py_dg_freedtoa(buf);
return result;
}
#else // _PY_SHORT_FLOAT_REPR == 0
/* fallback version, to be used when correctly rounded binary<->decimal
conversions aren't available */
static PyObject *
double_round(double x, int ndigits) {
double pow1, pow2, y, z;
if (ndigits >= 0) {
if (ndigits > 22) {
/* pow1 and pow2 are each safe from overflow, but
pow1*pow2 ~= pow(10.0, ndigits) might overflow */
pow1 = pow(10.0, (double)(ndigits-22));
pow2 = 1e22;
}
else {
pow1 = pow(10.0, (double)ndigits);
pow2 = 1.0;
}
y = (x*pow1)*pow2;
/* if y overflows, then rounded value is exactly x */
if (!Py_IS_FINITE(y))
return PyFloat_FromDouble(x);
}
else {
pow1 = pow(10.0, (double)-ndigits);
pow2 = 1.0; /* unused; silences a gcc compiler warning */
y = x / pow1;
}
z = round(y);
if (fabs(y-z) == 0.5)
/* halfway between two integers; use round-half-even */
z = 2.0*round(y/2.0);
if (ndigits >= 0)
z = (z / pow2) / pow1;
else
z *= pow1;
/* if computation resulted in overflow, raise OverflowError */
if (!Py_IS_FINITE(z)) {
PyErr_SetString(PyExc_OverflowError,
"overflow occurred during round");
return NULL;
}
return PyFloat_FromDouble(z);
}
#endif // _PY_SHORT_FLOAT_REPR == 0
/* round a Python float v to the closest multiple of 10**-ndigits */
/*[clinic input]
float.__round__
ndigits as o_ndigits: object = None
/
Return the Integral closest to x, rounding half toward even.
When an argument is passed, work like built-in round(x, ndigits).
[clinic start generated code]*/
static PyObject *
float___round___impl(PyObject *self, PyObject *o_ndigits)
/*[clinic end generated code: output=374c36aaa0f13980 input=fc0fe25924fbc9ed]*/
{
double x, rounded;
Py_ssize_t ndigits;
x = PyFloat_AsDouble(self);
if (o_ndigits == Py_None) {
/* single-argument round or with None ndigits:
* round to nearest integer */
rounded = round(x);
if (fabs(x-rounded) == 0.5)
/* halfway case: round to even */
rounded = 2.0*round(x/2.0);
return PyLong_FromDouble(rounded);
}
/* interpret second argument as a Py_ssize_t; clips on overflow */
ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
if (ndigits == -1 && PyErr_Occurred())
return NULL;
/* nans and infinities round to themselves */
if (!Py_IS_FINITE(x))
return PyFloat_FromDouble(x);
/* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
always rounds to itself. For ndigits < NDIGITS_MIN, x always
rounds to +-0.0. Here 0.30103 is an upper bound for log10(2). */
#define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
#define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
if (ndigits > NDIGITS_MAX)
/* return x */
return PyFloat_FromDouble(x);
else if (ndigits < NDIGITS_MIN)
/* return 0.0, but with sign of x */
return PyFloat_FromDouble(0.0*x);
else
/* finite x, and ndigits is not unreasonably large */
return double_round(x, (int)ndigits);
#undef NDIGITS_MAX
#undef NDIGITS_MIN
}
1997-05-02 00:12:38 -03:00
static PyObject *
2000-07-09 02:02:18 -03:00
float_float(PyObject *v)
{
if (PyFloat_CheckExact(v)) {
return Py_NewRef(v);
}
else {
return PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
}
}
/*[clinic input]
float.conjugate
Return self, the complex conjugate of any float.
[clinic start generated code]*/
static PyObject *
float_conjugate_impl(PyObject *self)
/*[clinic end generated code: output=8ca292c2479194af input=82ba6f37a9ff91dd]*/
{
return float_float(self);
}
/* turn ASCII hex characters into integer values and vice versa */
static char
char_from_hex(int x)
{
assert(0 <= x && x < 16);
return Py_hexdigits[x];
}
static int
hex_from_char(char c) {
int x;
switch(c) {
case '0':
x = 0;
break;
case '1':
x = 1;
break;
case '2':
x = 2;
break;
case '3':
x = 3;
break;
case '4':
x = 4;
break;
case '5':
x = 5;
break;
case '6':
x = 6;
break;
case '7':
x = 7;
break;
case '8':
x = 8;
break;
case '9':
x = 9;
break;
case 'a':
case 'A':
x = 10;
break;
case 'b':
case 'B':
x = 11;
break;
case 'c':
case 'C':
x = 12;
break;
case 'd':
case 'D':
x = 13;
break;
case 'e':
case 'E':
x = 14;
break;
case 'f':
case 'F':
x = 15;
break;
default:
x = -1;
break;
}
return x;
}
/* convert a float to a hexadecimal string */
/* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
of the form 4k+1. */
#define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
/*[clinic input]
float.hex
Return a hexadecimal representation of a floating-point number.
>>> (-0.1).hex()
'-0x1.999999999999ap-4'
>>> 3.14159.hex()
'0x1.921f9f01b866ep+1'
[clinic start generated code]*/
static PyObject *
float_hex_impl(PyObject *self)
/*[clinic end generated code: output=0ebc9836e4d302d4 input=bec1271a33d47e67]*/
{
double x, m;
int e, shift, i, si, esign;
/* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
trailing NUL byte. */
char s[(TOHEX_NBITS-1)/4+3];
CONVERT_TO_DOUBLE(self, x);
if (Py_IS_NAN(x) || Py_IS_INFINITY(x))
return float_repr((PyFloatObject *)self);
if (x == 0.0) {
if (copysign(1.0, x) == -1.0)
return PyUnicode_FromString("-0x0.0p+0");
else
return PyUnicode_FromString("0x0.0p+0");
}
m = frexp(fabs(x), &e);
shift = 1 - Py_MAX(DBL_MIN_EXP - e, 0);
m = ldexp(m, shift);
e -= shift;
si = 0;
s[si] = char_from_hex((int)m);
si++;
m -= (int)m;
s[si] = '.';
si++;
for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
m *= 16.0;
s[si] = char_from_hex((int)m);
si++;
m -= (int)m;
}
s[si] = '\0';
if (e < 0) {
esign = (int)'-';
e = -e;
}
else
esign = (int)'+';
if (x < 0.0)
return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
else
return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
}
/* Convert a hexadecimal string to a float. */
/*[clinic input]
@classmethod
float.fromhex
string: object
/
Create a floating-point number from a hexadecimal string.
>>> float.fromhex('0x1.ffffp10')
2047.984375
>>> float.fromhex('-0x1p-1074')
-5e-324
[clinic start generated code]*/
static PyObject *
float_fromhex(PyTypeObject *type, PyObject *string)
/*[clinic end generated code: output=46c0274d22b78e82 input=0407bebd354bca89]*/
{
PyObject *result;
double x;
long exp, top_exp, lsb, key_digit;
const char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
int half_eps, digit, round_up, negate=0;
Py_ssize_t length, ndigits, fdigits, i;
/*
* For the sake of simplicity and correctness, we impose an artificial
* limit on ndigits, the total number of hex digits in the coefficient
* The limit is chosen to ensure that, writing exp for the exponent,
*
* (1) if exp > LONG_MAX/2 then the value of the hex string is
* guaranteed to overflow (provided it's nonzero)
*
* (2) if exp < LONG_MIN/2 then the value of the hex string is
* guaranteed to underflow to 0.
*
* (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
* overflow in the calculation of exp and top_exp below.
*
* More specifically, ndigits is assumed to satisfy the following
* inequalities:
*
* 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
* 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
*
* If either of these inequalities is not satisfied, a ValueError is
* raised. Otherwise, write x for the value of the hex string, and
* assume x is nonzero. Then
*
* 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
*
* Now if exp > LONG_MAX/2 then:
*
* exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
* = DBL_MAX_EXP
*
* so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
* double, so overflows. If exp < LONG_MIN/2, then
*
* exp + 4*ndigits <= LONG_MIN/2 - 1 + (
* DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
* = DBL_MIN_EXP - DBL_MANT_DIG - 1
*
* and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
* when converted to a C double.
*
* It's easy to show that if LONG_MIN/2 <= exp <= LONG_MAX/2 then both
* exp+4*ndigits and exp-4*ndigits are within the range of a long.
*/
s = PyUnicode_AsUTF8AndSize(string, &length);
if (s == NULL)
return NULL;
s_end = s + length;
/********************
* Parse the string *
********************/
/* leading whitespace */
while (Py_ISSPACE(*s))
s++;
/* infinities and nans */
x = _Py_parse_inf_or_nan(s, (char **)&coeff_end);
if (coeff_end != s) {
s = coeff_end;
goto finished;
}
/* optional sign */
if (*s == '-') {
s++;
negate = 1;
}
else if (*s == '+')
s++;
/* [0x] */
s_store = s;
if (*s == '0') {
s++;
if (*s == 'x' || *s == 'X')
s++;
else
s = s_store;
}
/* coefficient: <integer> [. <fraction>] */
coeff_start = s;
while (hex_from_char(*s) >= 0)
s++;
s_store = s;
if (*s == '.') {
s++;
while (hex_from_char(*s) >= 0)
s++;
coeff_end = s-1;
}
else
coeff_end = s;
/* ndigits = total # of hex digits; fdigits = # after point */
ndigits = coeff_end - coeff_start;
fdigits = coeff_end - s_store;
if (ndigits == 0)
goto parse_error;
if (ndigits > Py_MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
goto insane_length_error;
/* [p <exponent>] */
if (*s == 'p' || *s == 'P') {
s++;
exp_start = s;
if (*s == '-' || *s == '+')
s++;
if (!('0' <= *s && *s <= '9'))
goto parse_error;
s++;
while ('0' <= *s && *s <= '9')
s++;
exp = strtol(exp_start, NULL, 10);
}
else
exp = 0;
/* for 0 <= j < ndigits, HEX_DIGIT(j) gives the jth most significant digit */
#define HEX_DIGIT(j) hex_from_char(*((j) < fdigits ? \
coeff_end-(j) : \
coeff_end-1-(j)))
/*******************************************
* Compute rounded value of the hex string *
*******************************************/
/* Discard leading zeros, and catch extreme overflow and underflow */
while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)
ndigits--;
if (ndigits == 0 || exp < LONG_MIN/2) {
x = 0.0;
goto finished;
}
if (exp > LONG_MAX/2)
goto overflow_error;
/* Adjust exponent for fractional part. */
exp = exp - 4*((long)fdigits);
/* top_exp = 1 more than exponent of most sig. bit of coefficient */
top_exp = exp + 4*((long)ndigits - 1);
for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)
top_exp++;
/* catch almost all nonextreme cases of overflow and underflow here */
if (top_exp < DBL_MIN_EXP - DBL_MANT_DIG) {
x = 0.0;
goto finished;
}
if (top_exp > DBL_MAX_EXP)
goto overflow_error;
/* lsb = exponent of least significant bit of the *rounded* value.
This is top_exp - DBL_MANT_DIG unless result is subnormal. */
lsb = Py_MAX(top_exp, (long)DBL_MIN_EXP) - DBL_MANT_DIG;
x = 0.0;
if (exp >= lsb) {
/* no rounding required */
for (i = ndigits-1; i >= 0; i--)
x = 16.0*x + HEX_DIGIT(i);
x = ldexp(x, (int)(exp));
goto finished;
}
/* rounding required. key_digit is the index of the hex digit
containing the first bit to be rounded away. */
half_eps = 1 << (int)((lsb - exp - 1) % 4);
key_digit = (lsb - exp - 1) / 4;
for (i = ndigits-1; i > key_digit; i--)
x = 16.0*x + HEX_DIGIT(i);
digit = HEX_DIGIT(key_digit);
x = 16.0*x + (double)(digit & (16-2*half_eps));
/* round-half-even: round up if bit lsb-1 is 1 and at least one of
bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
if ((digit & half_eps) != 0) {
round_up = 0;
if ((digit & (3*half_eps-1)) != 0 || (half_eps == 8 &&
key_digit+1 < ndigits && (HEX_DIGIT(key_digit+1) & 1) != 0))
round_up = 1;
else
for (i = key_digit-1; i >= 0; i--)
if (HEX_DIGIT(i) != 0) {
round_up = 1;
break;
}
2010-07-06 12:11:44 -03:00
if (round_up) {
x += 2*half_eps;
if (top_exp == DBL_MAX_EXP &&
x == ldexp((double)(2*half_eps), DBL_MANT_DIG))
/* overflow corner case: pre-rounded value <
2**DBL_MAX_EXP; rounded=2**DBL_MAX_EXP. */
goto overflow_error;
}
}
x = ldexp(x, (int)(exp+4*key_digit));
finished:
/* optional trailing whitespace leading to the end of the string */
while (Py_ISSPACE(*s))
s++;
if (s != s_end)
goto parse_error;
result = PyFloat_FromDouble(negate ? -x : x);
if (type != &PyFloat_Type && result != NULL) {
Py_SETREF(result, PyObject_CallOneArg((PyObject *)type, result));
}
return result;
overflow_error:
PyErr_SetString(PyExc_OverflowError,
"hexadecimal value too large to represent as a float");
return NULL;
parse_error:
PyErr_SetString(PyExc_ValueError,
"invalid hexadecimal floating-point string");
return NULL;
insane_length_error:
PyErr_SetString(PyExc_ValueError,
"hexadecimal string too long to convert");
return NULL;
}
/*[clinic input]
float.as_integer_ratio
Return a pair of integers, whose ratio is exactly equal to the original float.
The ratio is in lowest terms and has a positive denominator. Raise
OverflowError on infinities and a ValueError on NaNs.
>>> (10.0).as_integer_ratio()
(10, 1)
>>> (0.0).as_integer_ratio()
(0, 1)
>>> (-.25).as_integer_ratio()
(-1, 4)
[clinic start generated code]*/
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
static PyObject *
float_as_integer_ratio_impl(PyObject *self)
/*[clinic end generated code: output=65f25f0d8d30a712 input=d5ba7765655d75bd]*/
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
{
double self_double;
double float_part;
int exponent;
int i;
PyObject *py_exponent = NULL;
PyObject *numerator = NULL;
PyObject *denominator = NULL;
PyObject *result_pair = NULL;
PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
CONVERT_TO_DOUBLE(self, self_double);
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
if (Py_IS_INFINITY(self_double)) {
PyErr_SetString(PyExc_OverflowError,
"cannot convert Infinity to integer ratio");
return NULL;
}
if (Py_IS_NAN(self_double)) {
PyErr_SetString(PyExc_ValueError,
"cannot convert NaN to integer ratio");
return NULL;
}
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
float_part = frexp(self_double, &exponent); /* self_double == float_part * 2**exponent exactly */
for (i=0; i<300 && float_part != floor(float_part) ; i++) {
float_part *= 2.0;
exponent--;
}
/* self == float_part * 2**exponent exactly and float_part is integral.
If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
to be truncated by PyLong_FromDouble(). */
numerator = PyLong_FromDouble(float_part);
2015-12-29 16:55:48 -04:00
if (numerator == NULL)
goto error;
denominator = PyLong_FromLong(1);
if (denominator == NULL)
goto error;
py_exponent = PyLong_FromLong(Py_ABS(exponent));
if (py_exponent == NULL)
goto error;
/* fold in 2**exponent */
if (exponent > 0) {
Py_SETREF(numerator,
2015-12-29 16:55:48 -04:00
long_methods->nb_lshift(numerator, py_exponent));
if (numerator == NULL)
goto error;
}
else {
Py_SETREF(denominator,
2015-12-29 16:55:48 -04:00
long_methods->nb_lshift(denominator, py_exponent));
if (denominator == NULL)
goto error;
}
result_pair = PyTuple_Pack(2, numerator, denominator);
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
error:
Py_XDECREF(py_exponent);
Py_XDECREF(denominator);
Py_XDECREF(numerator);
return result_pair;
Merged revisions 60364-60378 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60364 | neal.norwitz | 2008-01-27 19:09:48 +0100 (Sun, 27 Jan 2008) | 4 lines Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception. ........ r60365 | georg.brandl | 2008-01-27 19:14:43 +0100 (Sun, 27 Jan 2008) | 2 lines Remove effectless expression statement. ........ r60367 | neal.norwitz | 2008-01-27 19:19:04 +0100 (Sun, 27 Jan 2008) | 1 line Try to handle socket.errors properly in is_unavailable ........ r60370 | christian.heimes | 2008-01-27 20:01:45 +0100 (Sun, 27 Jan 2008) | 1 line Change isbasestring function as discussed on the cvs list a while ago ........ r60372 | neal.norwitz | 2008-01-27 21:03:13 +0100 (Sun, 27 Jan 2008) | 3 lines socket.error doesn't have a headers attribute like ProtocolError. Handle that situation where we catch socket.errors. ........ r60375 | georg.brandl | 2008-01-27 21:25:12 +0100 (Sun, 27 Jan 2008) | 2 lines Add refcounting extension to build config. ........ r60377 | jeffrey.yasskin | 2008-01-28 00:08:46 +0100 (Mon, 28 Jan 2008) | 6 lines Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because it's useful outside of rational numbers. This is my first C code that had to do anything significant. Please be more careful when looking over it. ........ r60378 | christian.heimes | 2008-01-28 00:34:59 +0100 (Mon, 28 Jan 2008) | 1 line Added clear cache methods to clear the internal type lookup cache for ref leak test runs. ........
2008-01-27 19:50:43 -04:00
}
static PyObject *
float_subtype_new(PyTypeObject *type, PyObject *x);
/*[clinic input]
@classmethod
float.__new__ as float_new
x: object(c_default="NULL") = 0
/
Convert a string or number to a floating point number, if possible.
[clinic start generated code]*/
2001-08-02 01:15:00 -03:00
static PyObject *
float_new_impl(PyTypeObject *type, PyObject *x)
/*[clinic end generated code: output=ccf1e8dc460ba6ba input=f43661b7de03e9d8]*/
2001-08-02 01:15:00 -03:00
{
if (type != &PyFloat_Type) {
if (x == NULL) {
x = _PyLong_GetZero();
}
return float_subtype_new(type, x); /* Wimp out */
}
if (x == NULL) {
return PyFloat_FromDouble(0.0);
}
/* If it's a string, but not a string subclass, use
PyFloat_FromString. */
if (PyUnicode_CheckExact(x))
return PyFloat_FromString(x);
return PyNumber_Float(x);
2001-08-02 01:15:00 -03:00
}
/* Wimpy, slow approach to tp_new calls for subtypes of float:
first create a regular float from whatever arguments we got,
then allocate a subtype instance and initialize its ob_fval
from the regular float. The regular float is then thrown away.
*/
static PyObject *
float_subtype_new(PyTypeObject *type, PyObject *x)
{
PyObject *tmp, *newobj;
assert(PyType_IsSubtype(type, &PyFloat_Type));
tmp = float_new_impl(&PyFloat_Type, x);
if (tmp == NULL)
return NULL;
assert(PyFloat_Check(tmp));
newobj = type->tp_alloc(type, 0);
if (newobj == NULL) {
Py_DECREF(tmp);
return NULL;
}
((PyFloatObject *)newobj)->ob_fval = ((PyFloatObject *)tmp)->ob_fval;
Py_DECREF(tmp);
return newobj;
}
static PyObject *
float_vectorcall(PyObject *type, PyObject * const*args,
size_t nargsf, PyObject *kwnames)
{
if (!_PyArg_NoKwnames("float", kwnames)) {
return NULL;
}
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (!_PyArg_CheckPositional("float", nargs, 0, 1)) {
return NULL;
}
PyObject *x = nargs >= 1 ? args[0] : NULL;
return float_new_impl(_PyType_CAST(type), x);
}
/*[clinic input]
float.__getnewargs__
[clinic start generated code]*/
static PyObject *
float___getnewargs___impl(PyObject *self)
/*[clinic end generated code: output=873258c9d206b088 input=002279d1d77891e6]*/
{
return Py_BuildValue("(d)", ((PyFloatObject *)self)->ob_fval);
}
/* this is for the benefit of the pack/unpack routines below */
typedef enum _py_float_format_type float_format_type;
#define unknown_format _py_float_format_unknown
#define ieee_big_endian_format _py_float_format_ieee_big_endian
#define ieee_little_endian_format _py_float_format_ieee_little_endian
#define float_format (_PyRuntime.float_state.float_format)
#define double_format (_PyRuntime.float_state.double_format)
/*[clinic input]
@classmethod
float.__getformat__
typestr: str
Must be 'double' or 'float'.
/
You probably don't want to use this function.
It exists mainly to be used in Python's test suite.
This function returns whichever of 'unknown', 'IEEE, big-endian' or 'IEEE,
little-endian' best describes the format of floating point numbers used by the
C type named by typestr.
[clinic start generated code]*/
static PyObject *
float___getformat___impl(PyTypeObject *type, const char *typestr)
/*[clinic end generated code: output=2bfb987228cc9628 input=d5a52600f835ad67]*/
{
float_format_type r;
if (strcmp(typestr, "double") == 0) {
r = double_format;
}
else if (strcmp(typestr, "float") == 0) {
r = float_format;
}
else {
PyErr_SetString(PyExc_ValueError,
"__getformat__() argument 1 must be "
"'double' or 'float'");
return NULL;
}
switch (r) {
case unknown_format:
return PyUnicode_FromString("unknown");
case ieee_little_endian_format:
return PyUnicode_FromString("IEEE, little-endian");
case ieee_big_endian_format:
return PyUnicode_FromString("IEEE, big-endian");
default:
PyErr_SetString(PyExc_RuntimeError,
"insane float_format or double_format");
return NULL;
}
}
static PyObject *
float_getreal(PyObject *v, void *closure)
{
return float_float(v);
}
static PyObject *
float_getimag(PyObject *v, void *closure)
{
return PyFloat_FromDouble(0.0);
}
/*[clinic input]
float.__format__
format_spec: unicode
/
Formats the float according to format_spec.
[clinic start generated code]*/
static PyObject *
float___format___impl(PyObject *self, PyObject *format_spec)
/*[clinic end generated code: output=b260e52a47eade56 input=2ece1052211fd0e6]*/
{
_PyUnicodeWriter writer;
int ret;
_PyUnicodeWriter_Init(&writer);
ret = _PyFloat_FormatAdvancedWriter(
&writer,
self,
format_spec, 0, PyUnicode_GET_LENGTH(format_spec));
if (ret == -1) {
_PyUnicodeWriter_Dealloc(&writer);
return NULL;
}
return _PyUnicodeWriter_Finish(&writer);
}
static PyMethodDef float_methods[] = {
FLOAT_CONJUGATE_METHODDEF
FLOAT___TRUNC___METHODDEF
FLOAT___FLOOR___METHODDEF
FLOAT___CEIL___METHODDEF
FLOAT___ROUND___METHODDEF
FLOAT_AS_INTEGER_RATIO_METHODDEF
FLOAT_FROMHEX_METHODDEF
FLOAT_HEX_METHODDEF
FLOAT_IS_INTEGER_METHODDEF
FLOAT___GETNEWARGS___METHODDEF
FLOAT___GETFORMAT___METHODDEF
FLOAT___FORMAT___METHODDEF
{NULL, NULL} /* sentinel */
};
static PyGetSetDef float_getset[] = {
{"real",
float_getreal, (setter)NULL,
"the real part of a complex number",
NULL},
{"imag",
float_getimag, (setter)NULL,
"the imaginary part of a complex number",
NULL},
{NULL} /* Sentinel */
};
2001-08-02 01:15:00 -03:00
1997-05-02 00:12:38 -03:00
static PyNumberMethods float_as_number = {
float_add, /* nb_add */
float_sub, /* nb_subtract */
float_mul, /* nb_multiply */
float_rem, /* nb_remainder */
float_divmod, /* nb_divmod */
float_pow, /* nb_power */
(unaryfunc)float_neg, /* nb_negative */
float_float, /* nb_positive */
(unaryfunc)float_abs, /* nb_absolute */
(inquiry)float_bool, /* nb_bool */
0, /* nb_invert */
0, /* nb_lshift */
0, /* nb_rshift */
0, /* nb_and */
0, /* nb_xor */
0, /* nb_or */
float___trunc___impl, /* nb_int */
0, /* nb_reserved */
float_float, /* nb_float */
0, /* nb_inplace_add */
0, /* nb_inplace_subtract */
0, /* nb_inplace_multiply */
0, /* nb_inplace_remainder */
0, /* nb_inplace_power */
0, /* nb_inplace_lshift */
0, /* nb_inplace_rshift */
0, /* nb_inplace_and */
0, /* nb_inplace_xor */
0, /* nb_inplace_or */
float_floor_div, /* nb_floor_divide */
float_div, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
1990-10-14 09:07:46 -03:00
};
1997-05-02 00:12:38 -03:00
PyTypeObject PyFloat_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"float",
sizeof(PyFloatObject),
0,
(destructor)float_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)float_repr, /* tp_repr */
&float_as_number, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)float_hash, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
_Py_TPFLAGS_MATCH_SELF, /* tp_flags */
float_new__doc__, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
float_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
float_methods, /* tp_methods */
0, /* tp_members */
float_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
float_new, /* tp_new */
.tp_vectorcall = (vectorcallfunc)float_vectorcall,
1990-10-14 09:07:46 -03:00
};
static void
_init_global_state(void)
{
float_format_type detected_double_format, detected_float_format;
/* We attempt to determine if this machine is using IEEE
floating point formats by peering at the bits of some
carefully chosen values. If it looks like we are on an
IEEE platform, the float packing/unpacking routines can
just copy bits, if not they resort to arithmetic & shifts
and masks. The shifts & masks approach works on all finite
values, but what happens to infinities, NaNs and signed
zeroes on packing is an accident, and attempting to unpack
a NaN or an infinity will raise an exception.
Note that if we're on some whacked-out platform which uses
IEEE formats but isn't strictly little-endian or big-
endian, we will fall back to the portable shifts & masks
method. */
#if SIZEOF_DOUBLE == 8
{
double x = 9006104071832581.0;
if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
detected_double_format = ieee_big_endian_format;
else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
detected_double_format = ieee_little_endian_format;
else
detected_double_format = unknown_format;
}
#else
detected_double_format = unknown_format;
#endif
#if SIZEOF_FLOAT == 4
{
float y = 16711938.0;
if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
detected_float_format = ieee_big_endian_format;
else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
detected_float_format = ieee_little_endian_format;
else
detected_float_format = unknown_format;
}
#else
detected_float_format = unknown_format;
#endif
double_format = detected_double_format;
float_format = detected_float_format;
}
Merged revisions 59450-59464 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59455 | guido.van.rossum | 2007-12-10 21:42:53 +0100 (Mon, 10 Dec 2007) | 2 lines Remove a 2.2-ism. ........ r59459 | christian.heimes | 2007-12-10 23:28:56 +0100 (Mon, 10 Dec 2007) | 4 lines Backport of r59456:59458 from py3k to trunk Issue #1580: New free format floating point representation based on "Floating-Point Printer Sample Code", by Robert G. Burger. For example repr(11./5) now returns '2.2' instead of '2.2000000000000002'. Thanks to noam for the patch! I had to modify doubledigits.c slightly to support X64 and IA64 machines on Windows. I also added the new file to the three project files. ........ r59460 | guido.van.rossum | 2007-12-11 00:00:12 +0100 (Tue, 11 Dec 2007) | 4 lines Patch #1643738 by Ulisses Furquim -- make the is_tripped variable in signalmodule.c more robust. Includes Martin von Loewis's suggestion to set is_tripped after .tripped. ........ r59463 | kurt.kaiser | 2007-12-11 01:04:57 +0100 (Tue, 11 Dec 2007) | 2 lines format_paragraph_event wasn't returning 'break' ........ r59464 | christian.heimes | 2007-12-11 01:54:34 +0100 (Tue, 11 Dec 2007) | 3 lines The new float repr causes too much trouble and pain. I'm disabling the feature until we have sorted out the issues on all machines. 64bit machines seem to have issues and Guido has reported even worse. Guido: It's pretty bad actually -- repr(1e5) comes out as '1.0'... Ditto for repr(1eN) for most N... Both in 2.6 and in 3.0... ........
2007-12-10 21:06:40 -04:00
void
_PyFloat_InitState(PyInterpreterState *interp)
{
if (!_Py_IsMainInterpreter(interp)) {
return;
}
_init_global_state();
}
PyStatus
_PyFloat_InitTypes(PyInterpreterState *interp)
{
/* Init float info */
if (_PyStructSequence_InitBuiltin(interp, &FloatInfoType,
&floatinfo_desc) < 0)
{
return _PyStatus_ERR("can't init float info type");
}
return _PyStatus_OK();
}
void
_PyFloat_ClearFreeList(PyInterpreterState *interp)
{
#if PyFloat_MAXFREELIST > 0
struct _Py_float_state *state = &interp->float_state;
PyFloatObject *f = state->free_list;
while (f != NULL) {
PyFloatObject *next = (PyFloatObject*) Py_TYPE(f);
PyObject_Free(f);
f = next;
}
state->free_list = NULL;
state->numfree = 0;
#endif
Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60553 | neal.norwitz | 2008-02-03 17:53:09 +0100 (Sun, 03 Feb 2008) | 1 line Ignore leaky warnings from test_asynchat ........ r60555 | christian.heimes | 2008-02-03 20:51:13 +0100 (Sun, 03 Feb 2008) | 1 line Another int -> pid_t case ........ r60560 | amaury.forgeotdarc | 2008-02-03 23:51:43 +0100 (Sun, 03 Feb 2008) | 6 lines Ensure that PySet_Add() operates on a newly created frozenset, like PyTuple_SetItem does. Add PyFrozenSet_Check(), which was not needed before; The list of Py*Set_Check* macros seems to be complete now. Add missing NEWS entries about all this. ........ r60563 | amaury.forgeotdarc | 2008-02-04 00:14:32 +0100 (Mon, 04 Feb 2008) | 2 lines Nasty typo in setobject.h ........ r60564 | amaury.forgeotdarc | 2008-02-04 00:15:32 +0100 (Mon, 04 Feb 2008) | 3 lines Correct test_mailbox on win32: since the test sets a custom 'colon' attribute to the main mailbox, copy it to secondary mailbox instances. ........ r60565 | amaury.forgeotdarc | 2008-02-04 00:57:24 +0100 (Mon, 04 Feb 2008) | 2 lines Let test_socketserver pass on win32, which does not have AF_UNIX sockets. ........ r60566 | jeffrey.yasskin | 2008-02-04 02:04:35 +0100 (Mon, 04 Feb 2008) | 2 lines Make int() and long() fall back to __trunc__(). See issue 2002. ........ r60567 | christian.heimes | 2008-02-04 19:00:12 +0100 (Mon, 04 Feb 2008) | 3 lines Patch #1953 I implemented the function sys._compact_freelists() and C API functions PyInt_/PyFloat_CompactFreeList() to compact the pre-allocated blocks of ints and floats. They allow the user to reduce the memory usage of a Python process that deals with lots of numbers. The patch also renames sys._cleartypecache to sys._clear_type_cache ........
2008-02-04 14:48:49 -04:00
}
void
_PyFloat_Fini(PyInterpreterState *interp)
Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r60553 | neal.norwitz | 2008-02-03 17:53:09 +0100 (Sun, 03 Feb 2008) | 1 line Ignore leaky warnings from test_asynchat ........ r60555 | christian.heimes | 2008-02-03 20:51:13 +0100 (Sun, 03 Feb 2008) | 1 line Another int -> pid_t case ........ r60560 | amaury.forgeotdarc | 2008-02-03 23:51:43 +0100 (Sun, 03 Feb 2008) | 6 lines Ensure that PySet_Add() operates on a newly created frozenset, like PyTuple_SetItem does. Add PyFrozenSet_Check(), which was not needed before; The list of Py*Set_Check* macros seems to be complete now. Add missing NEWS entries about all this. ........ r60563 | amaury.forgeotdarc | 2008-02-04 00:14:32 +0100 (Mon, 04 Feb 2008) | 2 lines Nasty typo in setobject.h ........ r60564 | amaury.forgeotdarc | 2008-02-04 00:15:32 +0100 (Mon, 04 Feb 2008) | 3 lines Correct test_mailbox on win32: since the test sets a custom 'colon' attribute to the main mailbox, copy it to secondary mailbox instances. ........ r60565 | amaury.forgeotdarc | 2008-02-04 00:57:24 +0100 (Mon, 04 Feb 2008) | 2 lines Let test_socketserver pass on win32, which does not have AF_UNIX sockets. ........ r60566 | jeffrey.yasskin | 2008-02-04 02:04:35 +0100 (Mon, 04 Feb 2008) | 2 lines Make int() and long() fall back to __trunc__(). See issue 2002. ........ r60567 | christian.heimes | 2008-02-04 19:00:12 +0100 (Mon, 04 Feb 2008) | 3 lines Patch #1953 I implemented the function sys._compact_freelists() and C API functions PyInt_/PyFloat_CompactFreeList() to compact the pre-allocated blocks of ints and floats. They allow the user to reduce the memory usage of a Python process that deals with lots of numbers. The patch also renames sys._cleartypecache to sys._clear_type_cache ........
2008-02-04 14:48:49 -04:00
{
_PyFloat_ClearFreeList(interp);
#if defined(Py_DEBUG) && PyFloat_MAXFREELIST > 0
struct _Py_float_state *state = &interp->float_state;
state->numfree = -1;
#endif
}
void
_PyFloat_FiniType(PyInterpreterState *interp)
{
_PyStructSequence_FiniBuiltin(interp, &FloatInfoType);
}
/* Print summary info about the state of the optimized allocator */
void
_PyFloat_DebugMallocStats(FILE *out)
{
#if PyFloat_MAXFREELIST > 0
struct _Py_float_state *state = get_float_state();
_PyDebugAllocatorStats(out,
"free PyFloatObject",
state->numfree, sizeof(PyFloatObject));
#endif
}
/*----------------------------------------------------------------------------
* PyFloat_{Pack,Unpack}{2,4,8}. See floatobject.h.
* To match the NPY_HALF_ROUND_TIES_TO_EVEN behavior in:
* https://github.com/numpy/numpy/blob/master/numpy/core/src/npymath/halffloat.c
* We use:
* bits = (unsigned short)f; Note the truncation
* if ((f - bits > 0.5) || (f - bits == 0.5 && bits % 2)) {
* bits++;
* }
*/
int
PyFloat_Pack2(double x, char *data, int le)
{
unsigned char *p = (unsigned char *)data;
unsigned char sign;
int e;
double f;
unsigned short bits;
int incr = 1;
if (x == 0.0) {
sign = (copysign(1.0, x) == -1.0);
e = 0;
bits = 0;
}
else if (Py_IS_INFINITY(x)) {
sign = (x < 0.0);
e = 0x1f;
bits = 0;
}
else if (Py_IS_NAN(x)) {
/* There are 2046 distinct half-precision NaNs (1022 signaling and
1024 quiet), but there are only two quiet NaNs that don't arise by
quieting a signaling NaN; we get those by setting the topmost bit
of the fraction field and clearing all other fraction bits. We
choose the one with the appropriate sign. */
sign = (copysign(1.0, x) == -1.0);
e = 0x1f;
bits = 512;
}
else {
sign = (x < 0.0);
if (sign) {
x = -x;
}
f = frexp(x, &e);
if (f < 0.5 || f >= 1.0) {
PyErr_SetString(PyExc_SystemError,
"frexp() result out of range");
return -1;
}
/* Normalize f to be in the range [1.0, 2.0) */
f *= 2.0;
e--;
if (e >= 16) {
goto Overflow;
}
else if (e < -25) {
/* |x| < 2**-25. Underflow to zero. */
f = 0.0;
e = 0;
}
else if (e < -14) {
/* |x| < 2**-14. Gradual underflow */
f = ldexp(f, 14 + e);
e = 0;
}
else /* if (!(e == 0 && f == 0.0)) */ {
e += 15;
f -= 1.0; /* Get rid of leading 1 */
}
f *= 1024.0; /* 2**10 */
/* Round to even */
bits = (unsigned short)f; /* Note the truncation */
assert(bits < 1024);
assert(e < 31);
if ((f - bits > 0.5) || ((f - bits == 0.5) && (bits % 2 == 1))) {
++bits;
if (bits == 1024) {
/* The carry propagated out of a string of 10 1 bits. */
bits = 0;
++e;
if (e == 31)
goto Overflow;
}
}
}
bits |= (e << 10) | (sign << 15);
/* Write out result. */
if (le) {
p += 1;
incr = -1;
}
/* First byte */
*p = (unsigned char)((bits >> 8) & 0xFF);
p += incr;
/* Second byte */
*p = (unsigned char)(bits & 0xFF);
return 0;
Overflow:
PyErr_SetString(PyExc_OverflowError,
"float too large to pack with e format");
return -1;
}
int
PyFloat_Pack4(double x, char *data, int le)
{
unsigned char *p = (unsigned char *)data;
if (float_format == unknown_format) {
unsigned char sign;
int e;
double f;
unsigned int fbits;
int incr = 1;
if (le) {
p += 3;
incr = -1;
}
if (x < 0) {
sign = 1;
x = -x;
}
else
sign = 0;
f = frexp(x, &e);
/* Normalize f to be in the range [1.0, 2.0) */
if (0.5 <= f && f < 1.0) {
f *= 2.0;
e--;
}
else if (f == 0.0)
e = 0;
else {
PyErr_SetString(PyExc_SystemError,
"frexp() result out of range");
return -1;
}
if (e >= 128)
goto Overflow;
else if (e < -126) {
/* Gradual underflow */
f = ldexp(f, 126 + e);
e = 0;
}
else if (!(e == 0 && f == 0.0)) {
e += 127;
f -= 1.0; /* Get rid of leading 1 */
}
f *= 8388608.0; /* 2**23 */
fbits = (unsigned int)(f + 0.5); /* Round */
assert(fbits <= 8388608);
if (fbits >> 23) {
/* The carry propagated out of a string of 23 1 bits. */
fbits = 0;
++e;
if (e >= 255)
goto Overflow;
}
/* First byte */
*p = (sign << 7) | (e >> 1);
p += incr;
/* Second byte */
*p = (char) (((e & 1) << 7) | (fbits >> 16));
p += incr;
/* Third byte */
*p = (fbits >> 8) & 0xFF;
p += incr;
/* Fourth byte */
*p = fbits & 0xFF;
/* Done */
return 0;
}
else {
float y = (float)x;
int i, incr = 1;
if (Py_IS_INFINITY(y) && !Py_IS_INFINITY(x))
goto Overflow;
unsigned char s[sizeof(float)];
memcpy(s, &y, sizeof(float));
if ((float_format == ieee_little_endian_format && !le)
|| (float_format == ieee_big_endian_format && le)) {
p += 3;
incr = -1;
}
for (i = 0; i < 4; i++) {
*p = s[i];
p += incr;
}
return 0;
}
Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r61239 | andrew.kuchling | 2008-03-05 01:44:41 +0100 (Wed, 05 Mar 2008) | 1 line Add more items; add fragmentary notes ........ r61240 | amaury.forgeotdarc | 2008-03-05 02:50:33 +0100 (Wed, 05 Mar 2008) | 13 lines Issue#2238: some syntax errors from *args or **kwargs expressions would give bogus error messages, because of untested exceptions:: >>> f(**g(1=2)) XXX undetected error Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'int' object is not iterable instead of the expected SyntaxError: keyword can't be an expression Will backport. ........ r61241 | neal.norwitz | 2008-03-05 06:10:48 +0100 (Wed, 05 Mar 2008) | 3 lines Remove the files/dirs after closing the DB so the tests work on Windows. Patch from Trent Nelson. Also simplified removing a file by using test_support. ........ r61242 | neal.norwitz | 2008-03-05 06:14:18 +0100 (Wed, 05 Mar 2008) | 3 lines Get this test to pass even when there is no sound card in the system. Patch from Trent Nelson. (I can't test this.) ........ r61243 | neal.norwitz | 2008-03-05 06:20:44 +0100 (Wed, 05 Mar 2008) | 3 lines Catch OSError when trying to remove a file in case removal fails. This should prevent a failure in tearDown masking any real test failure. ........ r61244 | neal.norwitz | 2008-03-05 06:38:06 +0100 (Wed, 05 Mar 2008) | 5 lines Make the timeout longer to give slow machines a chance to pass the test before timing out. This doesn't change the duration of the test under normal circumstances. This is targetted at fixing the spurious failures on the FreeBSD buildbot primarily. ........ r61245 | neal.norwitz | 2008-03-05 06:49:03 +0100 (Wed, 05 Mar 2008) | 1 line Tabs -> spaces ........ r61246 | neal.norwitz | 2008-03-05 06:50:20 +0100 (Wed, 05 Mar 2008) | 1 line Use -u urlfetch to run more tests ........ r61247 | neal.norwitz | 2008-03-05 06:51:20 +0100 (Wed, 05 Mar 2008) | 1 line test_smtplib sometimes reports leaks too, suppress it ........ r61248 | jeffrey.yasskin | 2008-03-05 07:19:56 +0100 (Wed, 05 Mar 2008) | 5 lines Fix test_socketserver on Windows after r61099 added several signal.alarm() calls (which don't exist on non-Unix platforms). Thanks to Trent Nelson for the report and patch. ........ r61249 | georg.brandl | 2008-03-05 08:10:35 +0100 (Wed, 05 Mar 2008) | 2 lines Fix some rst. ........ r61252 | thomas.heller | 2008-03-05 15:53:39 +0100 (Wed, 05 Mar 2008) | 2 lines News entry for yesterdays commit. ........ r61253 | thomas.heller | 2008-03-05 16:34:29 +0100 (Wed, 05 Mar 2008) | 3 lines Issue 1872: Changed the struct module typecode from 't' to '?', for compatibility with PEP3118. ........ r61254 | skip.montanaro | 2008-03-05 17:41:09 +0100 (Wed, 05 Mar 2008) | 4 lines Elaborate on the role of the altinstall target when installing multiple versions. ........ r61255 | georg.brandl | 2008-03-05 20:31:44 +0100 (Wed, 05 Mar 2008) | 2 lines #2239: PYTHONPATH delimiter is os.pathsep. ........ r61256 | raymond.hettinger | 2008-03-05 21:59:58 +0100 (Wed, 05 Mar 2008) | 1 line C implementation of itertools.permutations(). ........ r61257 | raymond.hettinger | 2008-03-05 22:04:32 +0100 (Wed, 05 Mar 2008) | 1 line Small code cleanup. ........ r61260 | martin.v.loewis | 2008-03-05 23:24:31 +0100 (Wed, 05 Mar 2008) | 2 lines cd PCbuild only after deleting all pyc files. ........ r61261 | raymond.hettinger | 2008-03-06 02:15:52 +0100 (Thu, 06 Mar 2008) | 1 line Add examples. ........ r61262 | andrew.kuchling | 2008-03-06 02:36:27 +0100 (Thu, 06 Mar 2008) | 1 line Add two items ........ r61263 | georg.brandl | 2008-03-06 07:47:18 +0100 (Thu, 06 Mar 2008) | 2 lines #1725737: ignore other VC directories other than CVS and SVN's too. ........ r61264 | martin.v.loewis | 2008-03-06 07:55:22 +0100 (Thu, 06 Mar 2008) | 4 lines Patch #2232: os.tmpfile might fail on Windows if the user has no permission to create files in the root directory. Will backport to 2.5. ........ r61269 | georg.brandl | 2008-03-06 08:19:15 +0100 (Thu, 06 Mar 2008) | 2 lines Expand on re.split behavior with captured expressions. ........ r61270 | georg.brandl | 2008-03-06 08:22:09 +0100 (Thu, 06 Mar 2008) | 2 lines Little clarification of assignments. ........ r61271 | georg.brandl | 2008-03-06 08:31:34 +0100 (Thu, 06 Mar 2008) | 2 lines Add isinstance/issubclass to tutorial. ........ r61272 | georg.brandl | 2008-03-06 08:34:52 +0100 (Thu, 06 Mar 2008) | 2 lines Add missing NEWS entry for r61263. ........ r61273 | georg.brandl | 2008-03-06 08:41:16 +0100 (Thu, 06 Mar 2008) | 2 lines #2225: return nonzero status code from py_compile if not all files could be compiled. ........ r61274 | georg.brandl | 2008-03-06 08:43:02 +0100 (Thu, 06 Mar 2008) | 2 lines #2220: handle matching failure more gracefully. ........ r61275 | georg.brandl | 2008-03-06 08:45:52 +0100 (Thu, 06 Mar 2008) | 2 lines Bug #2220: handle rlcompleter attribute match failure more gracefully. ........ r61278 | martin.v.loewis | 2008-03-06 14:49:47 +0100 (Thu, 06 Mar 2008) | 1 line Rely on x64 platform configuration when building _bsddb on AMD64. ........ r61279 | martin.v.loewis | 2008-03-06 14:50:28 +0100 (Thu, 06 Mar 2008) | 1 line Update db-4.4.20 build procedure. ........ r61285 | raymond.hettinger | 2008-03-06 21:52:01 +0100 (Thu, 06 Mar 2008) | 1 line More tests. ........ r61286 | raymond.hettinger | 2008-03-06 23:51:36 +0100 (Thu, 06 Mar 2008) | 1 line Issue 2246: itertools grouper object did not participate in GC (should be backported). ........ r61288 | raymond.hettinger | 2008-03-07 02:33:20 +0100 (Fri, 07 Mar 2008) | 1 line Tweak recipes and tests ........ r61289 | jeffrey.yasskin | 2008-03-07 07:22:15 +0100 (Fri, 07 Mar 2008) | 5 lines Progress on issue #1193577 by adding a polling .shutdown() method to SocketServers. The core of the patch was written by Pedro Werneck, but any bugs are mine. I've also rearranged the code for timeouts in order to avoid interfering with the shutdown poll. ........ r61290 | nick.coghlan | 2008-03-07 15:13:28 +0100 (Fri, 07 Mar 2008) | 1 line Speed up with statements by storing the __exit__ method on the stack instead of in a temp variable (bumps the magic number for pyc files) ........ r61298 | andrew.kuchling | 2008-03-07 22:09:23 +0100 (Fri, 07 Mar 2008) | 1 line Grammar fix ........ r61303 | georg.brandl | 2008-03-08 10:54:06 +0100 (Sat, 08 Mar 2008) | 2 lines #2253: fix continue vs. finally docs. ........ r61304 | marc-andre.lemburg | 2008-03-08 11:01:43 +0100 (Sat, 08 Mar 2008) | 3 lines Add new name for Mandrake: Mandriva. ........ r61305 | georg.brandl | 2008-03-08 11:05:24 +0100 (Sat, 08 Mar 2008) | 2 lines #1533486: fix types in refcount intro. ........ r61312 | facundo.batista | 2008-03-08 17:50:27 +0100 (Sat, 08 Mar 2008) | 5 lines Issue 1106316. post_mortem()'s parameter, traceback, is now optional: it defaults to the traceback of the exception that is currently being handled. ........ r61313 | jeffrey.yasskin | 2008-03-08 19:26:54 +0100 (Sat, 08 Mar 2008) | 2 lines Add tests for with and finally performance to pybench. ........ r61314 | jeffrey.yasskin | 2008-03-08 21:08:21 +0100 (Sat, 08 Mar 2008) | 2 lines Fix pybench for pythons < 2.6, tested back to 2.3. ........ r61317 | jeffrey.yasskin | 2008-03-08 22:35:15 +0100 (Sat, 08 Mar 2008) | 3 lines Well that was dumb. platform.python_implementation returns a function, not a string. ........ r61329 | georg.brandl | 2008-03-09 16:11:39 +0100 (Sun, 09 Mar 2008) | 2 lines #2249: document assertTrue and assertFalse. ........ r61332 | neal.norwitz | 2008-03-09 20:03:42 +0100 (Sun, 09 Mar 2008) | 4 lines Introduce a lock to fix a race condition which caused an exception in the test. Some buildbots were consistently failing (e.g., amd64). Also remove a couple of semi-colons. ........ r61344 | raymond.hettinger | 2008-03-11 01:19:07 +0100 (Tue, 11 Mar 2008) | 1 line Add recipe to docs. ........ r61350 | guido.van.rossum | 2008-03-11 22:18:06 +0100 (Tue, 11 Mar 2008) | 3 lines Fix the overflows in expandtabs(). "This time for sure!" (Exploit at request.) ........ r61351 | raymond.hettinger | 2008-03-11 22:37:46 +0100 (Tue, 11 Mar 2008) | 1 line Improve docs for itemgetter(). Show that it works with slices. ........ r61363 | georg.brandl | 2008-03-13 08:15:56 +0100 (Thu, 13 Mar 2008) | 2 lines #2265: fix example. ........ r61364 | georg.brandl | 2008-03-13 08:17:14 +0100 (Thu, 13 Mar 2008) | 2 lines #2270: fix typo. ........ r61365 | georg.brandl | 2008-03-13 08:21:41 +0100 (Thu, 13 Mar 2008) | 2 lines #1720705: add docs about import/threading interaction, wording by Nick. ........ r61366 | andrew.kuchling | 2008-03-13 12:07:35 +0100 (Thu, 13 Mar 2008) | 1 line Add class decorators ........ r61367 | raymond.hettinger | 2008-03-13 17:43:17 +0100 (Thu, 13 Mar 2008) | 1 line Add 2-to-3 support for the itertools moved to builtins or renamed. ........ r61368 | raymond.hettinger | 2008-03-13 17:43:59 +0100 (Thu, 13 Mar 2008) | 1 line Consistent tense. ........ r61369 | raymond.hettinger | 2008-03-13 20:03:51 +0100 (Thu, 13 Mar 2008) | 1 line Issue 2274: Add heapq.heappushpop(). ........ r61370 | raymond.hettinger | 2008-03-13 20:33:34 +0100 (Thu, 13 Mar 2008) | 1 line Simplify the nlargest() code using heappushpop(). ........ r61371 | brett.cannon | 2008-03-13 21:27:00 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_thread over to unittest. Commits GHOP 237. Thanks Benjamin Peterson for the patch. ........ r61372 | brett.cannon | 2008-03-13 21:33:10 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_tokenize to doctest. Done as GHOP 238 by Josip Dzolonga. ........ r61373 | brett.cannon | 2008-03-13 21:47:41 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_contains, test_crypt, and test_select to unittest. Patch from GHOP 294 by David Marek. ........ r61374 | brett.cannon | 2008-03-13 22:02:16 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_gdbm to use unittest. Closes issue #1960. Thanks Giampaolo Rodola. ........ r61375 | brett.cannon | 2008-03-13 22:09:28 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_fcntl to unittest. Closes issue #2055. Thanks Giampaolo Rodola. ........ r61376 | raymond.hettinger | 2008-03-14 06:03:44 +0100 (Fri, 14 Mar 2008) | 1 line Leave heapreplace() unchanged. ........ r61378 | martin.v.loewis | 2008-03-14 14:56:09 +0100 (Fri, 14 Mar 2008) | 2 lines Patch #2284: add -x64 option to rt.bat. ........ r61379 | martin.v.loewis | 2008-03-14 14:57:59 +0100 (Fri, 14 Mar 2008) | 2 lines Use -x64 flag. ........ r61382 | brett.cannon | 2008-03-14 15:03:10 +0100 (Fri, 14 Mar 2008) | 2 lines Remove a bad test. ........ r61383 | mark.dickinson | 2008-03-14 15:23:37 +0100 (Fri, 14 Mar 2008) | 9 lines Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently across platforms: it should now raise OverflowError on all platforms. (Previously it raised OverflowError only on non IEEE 754 platforms.) Also fix the (already existing) test for this behaviour so that it actually raises TestFailed instead of just referencing it. ........ r61387 | thomas.heller | 2008-03-14 22:06:21 +0100 (Fri, 14 Mar 2008) | 1 line Remove unneeded initializer. ........ r61388 | martin.v.loewis | 2008-03-14 22:19:28 +0100 (Fri, 14 Mar 2008) | 2 lines Run debug version, cd to PCbuild. ........ r61392 | georg.brandl | 2008-03-15 00:10:34 +0100 (Sat, 15 Mar 2008) | 2 lines Remove obsolete paragraph. #2288. ........ r61395 | georg.brandl | 2008-03-15 01:20:19 +0100 (Sat, 15 Mar 2008) | 2 lines Fix lots of broken links in the docs, found by Sphinx' external link checker. ........ r61396 | skip.montanaro | 2008-03-15 03:32:49 +0100 (Sat, 15 Mar 2008) | 1 line note that fork and forkpty raise OSError on failure ........ r61402 | skip.montanaro | 2008-03-15 17:04:45 +0100 (Sat, 15 Mar 2008) | 1 line add %f format to datetime - issue 1158 ........ r61403 | skip.montanaro | 2008-03-15 17:07:11 +0100 (Sat, 15 Mar 2008) | 2 lines . ........
2008-03-15 21:07:10 -03:00
Overflow:
PyErr_SetString(PyExc_OverflowError,
"float too large to pack with f format");
return -1;
}
int
PyFloat_Pack8(double x, char *data, int le)
{
unsigned char *p = (unsigned char *)data;
if (double_format == unknown_format) {
unsigned char sign;
int e;
double f;
unsigned int fhi, flo;
int incr = 1;
if (le) {
p += 7;
incr = -1;
}
if (x < 0) {
sign = 1;
x = -x;
}
else
sign = 0;
f = frexp(x, &e);
/* Normalize f to be in the range [1.0, 2.0) */
if (0.5 <= f && f < 1.0) {
f *= 2.0;
e--;
}
else if (f == 0.0)
e = 0;
else {
PyErr_SetString(PyExc_SystemError,
"frexp() result out of range");
return -1;
}
if (e >= 1024)
goto Overflow;
else if (e < -1022) {
/* Gradual underflow */
f = ldexp(f, 1022 + e);
e = 0;
}
else if (!(e == 0 && f == 0.0)) {
e += 1023;
f -= 1.0; /* Get rid of leading 1 */
}
/* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */
f *= 268435456.0; /* 2**28 */
fhi = (unsigned int)f; /* Truncate */
assert(fhi < 268435456);
f -= (double)fhi;
f *= 16777216.0; /* 2**24 */
flo = (unsigned int)(f + 0.5); /* Round */
assert(flo <= 16777216);
if (flo >> 24) {
/* The carry propagated out of a string of 24 1 bits. */
flo = 0;
++fhi;
if (fhi >> 28) {
/* And it also propagated out of the next 28 bits. */
fhi = 0;
++e;
if (e >= 2047)
goto Overflow;
}
}
/* First byte */
*p = (sign << 7) | (e >> 4);
p += incr;
/* Second byte */
*p = (unsigned char) (((e & 0xF) << 4) | (fhi >> 24));
p += incr;
/* Third byte */
*p = (fhi >> 16) & 0xFF;
p += incr;
/* Fourth byte */
*p = (fhi >> 8) & 0xFF;
p += incr;
/* Fifth byte */
*p = fhi & 0xFF;
p += incr;
/* Sixth byte */
*p = (flo >> 16) & 0xFF;
p += incr;
/* Seventh byte */
*p = (flo >> 8) & 0xFF;
p += incr;
/* Eighth byte */
*p = flo & 0xFF;
/* p += incr; */
/* Done */
return 0;
Overflow:
PyErr_SetString(PyExc_OverflowError,
"float too large to pack with d format");
return -1;
}
else {
const unsigned char *s = (unsigned char*)&x;
int i, incr = 1;
if ((double_format == ieee_little_endian_format && !le)
|| (double_format == ieee_big_endian_format && le)) {
p += 7;
incr = -1;
}
for (i = 0; i < 8; i++) {
*p = *s++;
p += incr;
}
return 0;
}
}
double
PyFloat_Unpack2(const char *data, int le)
{
unsigned char *p = (unsigned char *)data;
unsigned char sign;
int e;
unsigned int f;
double x;
int incr = 1;
if (le) {
p += 1;
incr = -1;
}
/* First byte */
sign = (*p >> 7) & 1;
e = (*p & 0x7C) >> 2;
f = (*p & 0x03) << 8;
p += incr;
/* Second byte */
f |= *p;
if (e == 0x1f) {
if (f == 0) {
/* Infinity */
return sign ? -Py_HUGE_VAL : Py_HUGE_VAL;
}
else {
/* NaN */
return sign ? -fabs(Py_NAN) : fabs(Py_NAN);
}
}
x = (double)f / 1024.0;
if (e == 0) {
e = -14;
}
else {
x += 1.0;
e -= 15;
}
x = ldexp(x, e);
if (sign)
x = -x;
return x;
}
double
PyFloat_Unpack4(const char *data, int le)
{
unsigned char *p = (unsigned char *)data;
if (float_format == unknown_format) {
unsigned char sign;
int e;
unsigned int f;
double x;
int incr = 1;
if (le) {
p += 3;
incr = -1;
}
/* First byte */
sign = (*p >> 7) & 1;
e = (*p & 0x7F) << 1;
p += incr;
/* Second byte */
e |= (*p >> 7) & 1;
f = (*p & 0x7F) << 16;
p += incr;
if (e == 255) {
PyErr_SetString(
PyExc_ValueError,
"can't unpack IEEE 754 special value "
"on non-IEEE platform");
return -1;
}
/* Third byte */
f |= *p << 8;
p += incr;
/* Fourth byte */
f |= *p;
x = (double)f / 8388608.0;
/* XXX This sadly ignores Inf/NaN issues */
if (e == 0)
e = -126;
else {
x += 1.0;
e -= 127;
}
x = ldexp(x, e);
if (sign)
x = -x;
return x;
}
else {
float x;
if ((float_format == ieee_little_endian_format && !le)
|| (float_format == ieee_big_endian_format && le)) {
char buf[4];
char *d = &buf[3];
int i;
for (i = 0; i < 4; i++) {
*d-- = *p++;
}
memcpy(&x, buf, 4);
}
else {
memcpy(&x, p, 4);
}
return x;
}
}
double
PyFloat_Unpack8(const char *data, int le)
{
unsigned char *p = (unsigned char *)data;
if (double_format == unknown_format) {
unsigned char sign;
int e;
unsigned int fhi, flo;
double x;
int incr = 1;
if (le) {
p += 7;
incr = -1;
}
/* First byte */
sign = (*p >> 7) & 1;
e = (*p & 0x7F) << 4;
p += incr;
/* Second byte */
e |= (*p >> 4) & 0xF;
fhi = (*p & 0xF) << 24;
p += incr;
if (e == 2047) {
PyErr_SetString(
PyExc_ValueError,
"can't unpack IEEE 754 special value "
"on non-IEEE platform");
return -1.0;
}
/* Third byte */
fhi |= *p << 16;
p += incr;
/* Fourth byte */
fhi |= *p << 8;
p += incr;
/* Fifth byte */
fhi |= *p;
p += incr;
/* Sixth byte */
flo = *p << 16;
p += incr;
/* Seventh byte */
flo |= *p << 8;
p += incr;
/* Eighth byte */
flo |= *p;
x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */
x /= 268435456.0; /* 2**28 */
if (e == 0)
e = -1022;
else {
x += 1.0;
e -= 1023;
}
x = ldexp(x, e);
if (sign)
x = -x;
return x;
}
else {
double x;
if ((double_format == ieee_little_endian_format && !le)
|| (double_format == ieee_big_endian_format && le)) {
char buf[8];
char *d = &buf[7];
int i;
for (i = 0; i < 8; i++) {
*d-- = *p++;
}
memcpy(&x, buf, 8);
}
else {
memcpy(&x, p, 8);
}
return x;
}
}