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/*
** GETOPTS.C - Universal command line options parser
**
** Original Copyright 1993 by Bob Stout as part of
** the MicroFirm Function Library (MFL)
**
** This subset version is hereby donated to the public domain.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "portable.h"
#include "getopts.h"
#define NUL '\0'
#define MAX_XARGS 512
int xargc;
char *xargv[MAX_XARGS];
/*
** getopts()
**
** Parameters: 1 - argc from main()
** 2 - argv from main()
** 3 - your program's options[] array
**
** Returns: Number of options specified or -1 if error
**
** Note: Your program should declare the global options[] array which
** specifies all options recognized by getopts().
*/
int getopts(int argc, char *argv[])
{
int i, count, argidx = 0;
char *argp;
FILE *argfile;
char argline[256];
struct Option_Tag *ptr;
xargc = argc;
xargv[argidx++] = argv[0];
for (i = 1, count = 0; i < argc; ++i)
{
if (strchr("-/", argv[i][0]) && !strchr("-/", argv[i][1]))
{
/*
** Found a switch - If the 2nd character is also a switch
** character. If so, then it's a literal and is skipped
*/
if (strchr("-/", argv[i][1]))
continue;
for (ptr = options; ptr->buf; ++ptr)
{
if ((int)argv[i][1] == ptr->letter) switch (ptr->type)
{
case Boolean_Tag:
if ('-' == argv[i][2])
*((Boolean_T *)(ptr->buf)) = FALSE;
else *((Boolean_T *)(ptr->buf)) = TRUE;
++count;
--xargc;
break;
case Word_Tag:
sscanf(&argv[i][2], "%hd", (short *)(ptr->buf));
++count;
--xargc;
break;
case DWord_Tag:
sscanf(&argv[i][2], "%ld", (long *)(ptr->buf));
++count;
--xargc;
break;
case Double_Tag:
sscanf(&argv[i][2], "%lg", (double *)(ptr->buf);
++count;
--xargc;
break;
case String_Tag:
strcpy(ptr->buf, &argv[i][2]);
++count;
--xargc;
break;
default:
return ERROR;
}
}
}
else /* It must be a file name */
{
DOSFileData ffblk;
/* Set argp to point to the filename */
if (strchr("-/", argv[i][0]))
argp = &argv[i][1];
else argp = argv[i];
/* If no wildcards, just copy it */
if (!strchr(argp, '*') && !strchr(argp, '?'))
{
xargv[argidx++] = argp;
continue;
}
/* Expand wildcards, if possible */
if (0 == FIND_FIRST(argp, 0xff, &ffblk))
{
char path[FILENAME_MAX], *p;
/* Save the path for re-attachment */
if (NULL == (p = strrchr(argp, '\\')))
p = strrchr(argp, '/');
if (p)
{
char ch = *p;
*p = NUL;
strcat(strcpy(path, argp), "\\");
*p = ch;
}
else *path = NUL;
--xargc;
do
{
xargv[argidx] = malloc(strlen(ffblk.name)
+ strlen(path) + 2);
strcat(strcpy(xargv[argidx], path), ffblk.name);
++argidx;
++xargc;
} while (0 == FIND_NEXT(&ffblk));
}
}
}
return count;
}
#ifdef TEST
#include <stdlib.h>
Boolean_T test1 = TRUE, test2 = FALSE;
int test3 = -37;
long test4 = 100000L;
char test5[80] = "Default string";
struct Option_Tag options[] = {
{'A', Boolean_Tag, &test1 }, /* Valid options */
{'B', Boolean_Tag, &test2 },
{'C', Word_Tag, &test3 },
{'D', DWord_Tag, &test4 },
{'E', String_Tag, test5 },
{'\0', ERROR, NULL } /* Terminating record */
};
#define TFprint(v) ((v) ? "TRUE" : "FALSE")
int main(int argc, char *argv[])
{
int i;
printf("Defaults:\ntest1 = %s\ntest2 = %s\ntest3 = %d\ntest4 = %ld\n"
"test5 = \"%s\"\n\n", TFprint(test1), TFprint(test2), test3,
test4, test5);
printf("getopts() returned %d\n", getopts(argc, argv));
printf("Options are now:\ntest1 = %s\ntest2 = %s\ntest3 = %d\n"
"test4 = %ld\ntest5 = \"%s\"\n\n", TFprint(test1),
TFprint(test2), test3, test4, test5);
puts("Hit any key to continue");
getch();
for (i = 0; i < xargc; ++i)
printf("xargv[%d] = \"%s\"\n", i, xargv[i]);
printf("\nxargc = %d\n", xargc);
return 0;
}
#endif
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