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Ley0k 2016-03-27 11:49:47 +02:00
commit 09bed43f97
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53
code/tools/lcc/cpp/getopt.c Normal file
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#include <stdio.h>
#include <string.h>
#define EPR fprintf(stderr,
#define ERR(str, chr) if(opterr){EPR "%s%c\n", str, chr);}
int opterr = 1;
int optind = 1;
int optopt;
char *optarg;
int
getopt (int argc, char *const argv[], const char *opts)
{
static int sp = 1;
int c;
char *cp;
if (sp == 1) {
if (optind >= argc ||
argv[optind][0] != '-' || argv[optind][1] == '\0')
return -1;
else if (strcmp(argv[optind], "--") == 0) {
optind++;
return -1;
}
}
optopt = c = argv[optind][sp];
if (c == ':' || (cp=strchr(opts, c)) == 0) {
ERR (": illegal option -- ", c);
if (argv[optind][++sp] == '\0') {
optind++;
sp = 1;
}
return '?';
}
if (*++cp == ':') {
if (argv[optind][sp+1] != '\0')
optarg = &argv[optind++][sp+1];
else if (++optind >= argc) {
ERR (": option requires an argument -- ", c);
sp = 1;
return '?';
} else
optarg = argv[optind++];
sp = 1;
} else {
if (argv[optind][++sp] == '\0') {
sp = 1;
optind++;
}
optarg = 0;
}
return c;
}