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px4-firmware/misc/pascal/insn16/prun/prun.c

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/****************************************************************************
* prun.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "keywords.h"
#include "pdefs.h"
#include "pinsn16.h"
#include "pxdefs.h"
#include "pedefs.h"
#include "paslib.h"
#include "perr.h"
#include "pexec.h"
#include "pdbg.h"
/****************************************************************************
* Definitions
****************************************************************************/
#define MIN_STACK_SIZE 1024
#define DEFAULT_STACK_SIZE 4096
#define DEFAULT_STKSTR_SIZE 0
/****************************************************************************
* Private Type Definitions
****************************************************************************/
/****************************************************************************
* Private Constant Data
****************************************************************************/
static const struct option long_options[] =
{
{"stack", 1, NULL, 's'},
{"string", 1, NULL, 't'},
{"debug", 0, NULL, 'd'},
{"help", 0, NULL, 'h'},
{NULL, 0, NULL, 0}
};
/****************************************************************************
* Private Data
****************************************************************************/
static const char *g_pofffilename;
static int32_t g_varstacksize = DEFAULT_STACK_SIZE;
static int32_t g_strstacksize = DEFAULT_STKSTR_SIZE;
static int g_debug = 0;
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: prun_showusage
****************************************************************************/
static void prun_showusage(const char *progname)
{
fprintf(stderr, "Usage:\n");
fprintf(stderr, " %s [options] <program-filename>\n",
progname);
fprintf(stderr, "options:\n");
fprintf(stderr, " -s <stack-size>\n");
fprintf(stderr, " --stack <stack-size>\n");
fprintf(stderr, " Memory in bytes to allocate for the pascal program\n");
fprintf(stderr, " stack in bytes (minimum is %d; default is %d bytes)\n",
MIN_STACK_SIZE, DEFAULT_STACK_SIZE);
fprintf(stderr, " -t <stack-size>\n");
fprintf(stderr, " --string <string-storage-size>\n");
fprintf(stderr, " Memory in bytes to allocate for the pascal program\n");
fprintf(stderr, " string storage in bytes (default is %d bytes)\n",
DEFAULT_STKSTR_SIZE);
fprintf(stderr, " -d\n");
fprintf(stderr, " --debug\n");
fprintf(stderr, " Enable PCode program debugger\n");
fprintf(stderr, " -h\n");
fprintf(stderr, " --help\n");
fprintf(stderr, " Shows this message\n");
exit(1);
}
/****************************************************************************
* Name: prun_parseargs
****************************************************************************/
static void prun_parseargs(int argc, char **argv)
{
int option_index;
int size;
int c;
/* Check for existence of filename argument */
if (argc < 2)
{
fprintf(stderr, "ERROR: Filename required\n");
prun_showusage(argv[0]);
} /* end if */
/* Parse the command line options */
do
{
c = getopt_long (argc, argv, "t:s:dh",
long_options, &option_index);
if (c != -1)
{
switch (c)
{
case 's' :
size = atoi(optarg);
if (size < MIN_STACK_SIZE)
{
fprintf(stderr, "ERROR: Invalid stack size\n");
prun_showusage(argv[0]);
}
g_varstacksize = (size + 3) & ~3;
break;
case 't' :
size = atoi(optarg);
if (size < 0)
{
fprintf(stderr, "ERROR: Invalid string storage size\n");
prun_showusage(argv[0]);
}
g_strstacksize = ((size + 3) & ~3);
break;
case 'd' :
g_debug++;
break;
case 'h' :
prun_showusage(argv[0]);
break;
default:
/* Shouldn't happen */
fprintf(stderr, "ERROR: Unrecognized option\n");
prun_showusage(argv[0]);
}
}
}
while (c != -1);
if (optind != argc-1)
{
fprintf(stderr, "ERROR: Only one filename permitted on command line\n");
prun_showusage(argv[0]);
}
/* Get the name of the p-code file(s) from the last argument(s) */
g_pofffilename = argv[argc-1];
}
/****************************************************************************
* Name: prun
*
* Description:
* This function executes the P-Code program until a stopping condition
* is encountered.
*
****************************************************************************/
static void prun(struct pexec_s *st)
{
int errcode;
for (;;)
{
/* Execute the instruction; Check for exceptional conditions */
errcode = pexec(st);
if (errcode != eNOERROR) break;
}
if (errcode != eEXIT)
{
printf("Runtime error 0x%02x -- Execution Stopped\n", errcode);
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: main
****************************************************************************/
int main(int argc, char *argv[], char *envp[])
{
struct pexec_s *st;
char fileName[FNAME_SIZE+1]; /* Object file name */
/* Parse the command line arguments */
prun_parseargs(argc, argv);
/* Load the POFF files specified on the command line */
/* Use .o or command line extension, if supplied */
(void)extension(g_pofffilename, "o", fileName, 0);
/* Load the POFF file */
st = pload(fileName, g_varstacksize, g_strstacksize);
if (!st)
{
fprintf(stderr, "ERROR: Could not load %s\n", fileName);
exit(1);
} /* end if */
printf("%s Loaded\n", fileName);
/* And start program execution in the specified mode */
if (g_debug)
dbg_run(st);
else
prun(st);
/* Clean up resources used by the interpreter */
pexec_release(st);
return 0;
} /* end main */
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