7f79ec8ff3
git-svn-id: https://bucket.mit.edu/svn/nilm/acquisition/ethstream@7298 ddd99763-3ecb-0310-9145-efcb8ce7c51f
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
/*
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* Copyright (c) 2003-2007 Jim Paris <jim@jtan.com>
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*
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* This is free software; you can redistribute it and/or modify it and
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* it is provided under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation; see COPYING.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "opt.h"
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void
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opt_init (int *optind)
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{
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*optind = 0;
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}
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char
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opt_parse (int argc, char **argv, int *optind, char **optarg,
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struct options *opt)
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{
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char c;
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int i;
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(*optind)++;
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if (*optind >= argc)
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return 0;
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if (argv[*optind][0] == '-' &&
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argv[*optind][1] != '-' && argv[*optind][1] != 0)
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{
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/* Short option (or a bunch of 'em) */
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/* Save this and shift others over */
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c = argv[*optind][1];
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for (i = 2; argv[*optind][i] != 0; i++)
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argv[*optind][i - 1] = argv[*optind][i];
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argv[*optind][i - 1] = 0;
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if (argv[*optind][1] != 0)
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(*optind)--;
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/* Now find it */
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for (i = 0; opt[i].shortopt != 0; i++)
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if (opt[i].shortopt == c)
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break;
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if (opt[i].shortopt == 0)
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{
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fprintf (stderr, "Error: unknown option '-%c'\n", c);
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return '?';
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}
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if (opt[i].arg == NULL)
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return c;
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(*optind)++;
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if (*optind >= argc || (argv[*optind][0] == '-' &&
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argv[*optind][1] != 0))
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{
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fprintf (stderr, "Error: option '-%c' requires an "
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"argument\n", c);
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return '?';
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}
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(*optarg) = argv[*optind];
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return c;
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}
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else if (argv[*optind][0] == '-' &&
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argv[*optind][1] == '-' && argv[*optind][2] != 0)
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{
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/* Long option */
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for (i = 0; (c = opt[i].shortopt) != 0; i++)
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if (strcmp (opt[i].longopt, argv[*optind] + 2) == 0)
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break;
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if (opt[i].shortopt == 0)
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{
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fprintf (stderr, "Error: unknown option '%s'\n", argv[*optind]);
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return '?';
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}
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if (opt[i].arg == NULL)
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return c;
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(*optind)++;
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if (*optind >= argc || (argv[*optind][0] == '-' &&
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argv[*optind][1] != 0))
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{
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fprintf (stderr, "Error: option '%s' requires an "
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"argument\n", argv[*optind - 1]);
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return '?';
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}
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(*optarg) = argv[*optind];
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return c;
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}
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else
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{
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/* End of options */
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return 0;
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}
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}
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void
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opt_help (struct options *opt, FILE * out)
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{
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int i;
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int printed;
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for (i = 0; opt[i].shortopt != 0; i++)
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{
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fprintf (out, " -%c, --%s%n", opt[i].shortopt,
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opt[i].longopt, &printed);
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fprintf (out, " %-*s%s\n", 30 - printed,
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opt[i].arg ? opt[i].arg : "", opt[i].help);
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}
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}
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