Annotation of prex-old/usr/lib/libc/stdlib/getopt.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 1987, 1993, 1994
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the University nor the names of its contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <stdio.h>
! 31: #include <stdlib.h>
! 32: #include <string.h>
! 33:
! 34: int opterr = 1, /* if error message should be printed */
! 35: optind = 1, /* index into parent argv vector */
! 36: optopt, /* character checked for validity */
! 37: optreset; /* reset getopt */
! 38: char *optarg; /* argument associated with option */
! 39:
! 40: #define BADCH (int)'?'
! 41: #define BADARG (int)':'
! 42: #define EMSG ""
! 43:
! 44: /*
! 45: * getopt --
! 46: * Parse argc/argv argument vector.
! 47: */
! 48: int
! 49: getopt(int nargc, char * const nargv[], const char *ostr)
! 50: {
! 51: #if 0
! 52: extern char *__progname;
! 53: #endif
! 54: static char *place = EMSG; /* option letter processing */
! 55: char *oli; /* option letter list index */
! 56:
! 57: if (optreset || !*place) { /* update scanning pointer */
! 58: optreset = 0;
! 59: if (optind >= nargc || *(place = nargv[optind]) != '-') {
! 60: place = EMSG;
! 61: return (-1);
! 62: }
! 63: if (place[1] && *++place == '-') { /* found "--" */
! 64: ++optind;
! 65: place = EMSG;
! 66: return (-1);
! 67: }
! 68: } /* option letter okay? */
! 69: if ((optopt = (int)*place++) == (int)':' ||
! 70: !(oli = strchr(ostr, optopt))) {
! 71: /*
! 72: * if the user didn't specify '-' as an option,
! 73: * assume it means -1.
! 74: */
! 75: if (optopt == (int)'-')
! 76: return (-1);
! 77: if (!*place)
! 78: ++optind;
! 79: #if 0
! 80: if (opterr && *ostr != ':')
! 81: (void)fprintf(stderr,
! 82: "%s: illegal option -- %c\n", __progname, optopt);
! 83: #endif
! 84: return (BADCH);
! 85: }
! 86: if (*++oli != ':') { /* don't need argument */
! 87: optarg = NULL;
! 88: if (!*place)
! 89: ++optind;
! 90: }
! 91: else { /* need an argument */
! 92: if (*place) /* no white space */
! 93: optarg = place;
! 94: else if (nargc <= ++optind) { /* no arg */
! 95: place = EMSG;
! 96: if (*ostr == ':')
! 97: return (BADARG);
! 98: #if 0
! 99: if (opterr)
! 100: (void)fprintf(stderr,
! 101: "%s: option requires an argument -- %c\n",
! 102: __progname, optopt);
! 103: #endif
! 104: return (BADCH);
! 105: }
! 106: else /* white space */
! 107: optarg = nargv[optind];
! 108: place = EMSG;
! 109: ++optind;
! 110: }
! 111: return (optopt); /* dump back option letter */
! 112: }
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