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Viewing changes to code/tools/lcc/cpp/getopt.c

  • Committer: Bazaar Package Importer
  • Author(s): Bruno "Fuddl" Kleinert
  • Date: 2007-01-20 12:28:09 UTC
  • Revision ID: james.westby@ubuntu.com-20070120122809-2yza5ojt7nqiyiam
Tags: upstream-0.6.0
Import upstream version 0.6.0

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code/tools/lcc/cpp/getopt.c
 
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#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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        }
 
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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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}