1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Fri Jun 13 10:39:00 1997, tfelix@fred.net: 34 * Ported to Win32, changed index/rindex to strchr/strrchr 35 */ 36 37 #include "precomp.h" 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 static char sccsid[] = "@(#)getopt.c 4.13 (Berkeley) 2/23/91"; 41 #endif /* LIBC_SCCS and not lint */ 42 43 /* 44 * get option letter from argument vector 45 */ 46 int opterr = 1, /* if error message should be printed */ 47 optind = 1, /* index into parent argv vector */ 48 optopt; /* character checked for validity */ 49 const char *optarg; /* argument associated with option */ 50 51 #define BADCH (int)'?' 52 #define EMSG "" 53 54 int 55 getopt(int nargc, char * const *nargv, const char *ostr) 56 { 57 static const char *place = EMSG; /* option letter processing */ 58 register char *oli; /* option letter list index */ 59 char *p; 60 61 if (!*place) { /* update scanning pointer */ 62 if (optind >= nargc || *(place = nargv[optind]) != '-') { 63 place = EMSG; 64 return(EOF); 65 } 66 if (place[1] && *++place == '-') { /* found "--" */ 67 ++optind; 68 place = EMSG; 69 return(EOF); 70 } 71 } /* option letter okay? */ 72 if ((optopt = (int)*place++) == (int)':' || 73 !(oli = strchr(ostr, optopt))) { 74 /* 75 * if the user didn't specify '-' as an option, 76 * assume it means EOF. 77 */ 78 if (optopt == (int)'-') 79 return(EOF); 80 if (!*place) 81 ++optind; 82 if (opterr) { 83 if (!(p = strrchr(*nargv, '/'))) 84 p = *nargv; 85 else 86 ++p; 87 (void)fprintf(stderr, "%s: illegal option -- %c\n", 88 p, optopt); 89 } 90 return(BADCH); 91 } 92 if (*++oli != ':') { /* don't need argument */ 93 optarg = NULL; 94 if (!*place) 95 ++optind; 96 } 97 else { /* need an argument */ 98 if (*place) /* no white space */ 99 optarg = place; 100 else if (nargc <= ++optind) { /* no arg */ 101 place = EMSG; 102 if (!(p = strrchr(*nargv, '/'))) 103 p = *nargv; 104 else 105 ++p; 106 if (opterr) 107 (void)fprintf(stderr, 108 "%s: option requires an argument -- %c\n", 109 p, optopt); 110 return(BADCH); 111 } 112 else /* white space */ 113 optarg = nargv[optind]; 114 place = EMSG; 115 ++optind; 116 } 117 return(optopt); /* dump back option letter */ 118 } 119