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XGetopt.c
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C/C++ Source or Header
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2007-03-11
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1KB
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71 lines
#include <windows.h>
#include <stdio.h>
char *optarg; // global argument pointer
int optind = 0; // global argv index
char c;
char *cp;
int getopt(int argc, char *argv[], char *optstring)
{
static char *next = NULL;
if (optind == 0)
next = NULL;
optarg = NULL;
if (next == NULL || *next == '\0')
{
if (optind == 0)
optind++;
if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
{
optarg = NULL;
if (optind < argc)
optarg = argv[optind];
return EOF;
}
if (strcmp(argv[optind], "--") == 0)
{
optind++;
optarg = NULL;
if (optind < argc)
optarg = argv[optind];
return EOF;
}
next = argv[optind];
next++; // skip past -
optind++;
}
c = *next++;
cp = strchr(optstring, c);
if (cp == NULL || c == ':')
return '?';
cp++;
if (*cp == ':')
{
if (*next != '\0')
{
optarg = next;
next = NULL;
}
else if (optind < argc)
{
optarg = argv[optind];
optind++;
}
else
{
return ':';
}
}
return c;
}