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[/] [eco32/] [trunk/] [lcc/] [cpp/] [getopt.c] - Blame information for rev 130

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Line No. Rev Author Line
1 4 hellwig
#include        <stdio.h>
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#include        <string.h>
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#define EPR                 fprintf(stderr,
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#define ERR(str, chr)       if(opterr){EPR "%s%c\n", str, chr);}
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int     opterr = 1;
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int     optind = 1;
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int     optopt;
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char    *optarg;
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int
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getopt (int argc, char *const argv[], const char *opts)
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{
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        static int sp = 1;
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        int c;
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        char *cp;
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        if (sp == 1)
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                if (optind >= argc ||
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                   argv[optind][0] != '-' || argv[optind][1] == '\0')
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                        return -1;
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                else if (strcmp(argv[optind], "--") == 0) {
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                        optind++;
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                        return -1;
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                }
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        optopt = c = argv[optind][sp];
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        if (c == ':' || (cp=strchr(opts, c)) == 0) {
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                ERR (": illegal option -- ", c);
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                if (argv[optind][++sp] == '\0') {
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                        optind++;
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                        sp = 1;
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                }
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                return '?';
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        }
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        if (*++cp == ':') {
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                if (argv[optind][sp+1] != '\0')
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                        optarg = &argv[optind++][sp+1];
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                else if (++optind >= argc) {
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                        ERR (": option requires an argument -- ", c);
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                        sp = 1;
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                        return '?';
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                } else
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                        optarg = argv[optind++];
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                sp = 1;
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        } else {
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                if (argv[optind][++sp] == '\0') {
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                        sp = 1;
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                        optind++;
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                }
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                optarg = 0;
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        }
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        return c;
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}

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