Annotation of src/usr.bin/pr/egetopt.c, Revision 1.1
1.1 ! deraadt 1: /*-
! 2: * Copyright (c) 1991 Keith Muller.
! 3: * Copyright (c) 1993
! 4: * The Regents of the University of California. All rights reserved.
! 5: *
! 6: * This code is derived from software contributed to Berkeley by
! 7: * Keith Muller of the University of California, San Diego.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. All advertising materials mentioning features or use of this software
! 18: * must display the following acknowledgement:
! 19: * This product includes software developed by the University of
! 20: * California, Berkeley and its contributors.
! 21: * 4. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: */
! 37:
! 38: #ifndef lint
! 39: /* from: static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93"; */
! 40: static char *rcsid = "$Id: egetopt.c,v 1.1 1994/01/06 15:57:18 cgd Exp $";
! 41: #endif /* not lint */
! 42:
! 43: #include <ctype.h>
! 44: #include <stdio.h>
! 45: #include <stdlib.h>
! 46: #include <string.h>
! 47:
! 48: #include "extern.h"
! 49:
! 50: /*
! 51: * egetopt: get option letter from argument vector (an extended
! 52: * version of getopt).
! 53: *
! 54: * Non standard additions to the ostr specs are:
! 55: * 1) '?': immediate value following arg is optional (no white space
! 56: * between the arg and the value)
! 57: * 2) '#': +/- followed by a number (with an optional sign but
! 58: * no white space between the arg and the number). The - may be
! 59: * combined with other options, but the + cannot.
! 60: */
! 61:
! 62: int eopterr = 1; /* if error message should be printed */
! 63: int eoptind = 1; /* index into parent argv vector */
! 64: int eoptopt; /* character checked for validity */
! 65: char *eoptarg; /* argument associated with option */
! 66:
! 67: #define BADCH (int)'?'
! 68: #define EMSG ""
! 69:
! 70: int
! 71: egetopt(nargc, nargv, ostr)
! 72: int nargc;
! 73: char * const *nargv;
! 74: const char *ostr;
! 75: {
! 76: static char *place = EMSG; /* option letter processing */
! 77: register char *oli; /* option letter list index */
! 78: static int delim; /* which option delimeter */
! 79: register char *p;
! 80: static char savec = '\0';
! 81:
! 82: if (savec != '\0') {
! 83: *place = savec;
! 84: savec = '\0';
! 85: }
! 86:
! 87: if (!*place) {
! 88: /*
! 89: * update scanning pointer
! 90: */
! 91: if ((eoptind >= nargc) ||
! 92: ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) {
! 93: place = EMSG;
! 94: return (EOF);
! 95: }
! 96:
! 97: delim = (int)*place;
! 98: if (place[1] && *++place == '-' && !place[1]) {
! 99: /*
! 100: * found "--"
! 101: */
! 102: ++eoptind;
! 103: place = EMSG;
! 104: return (EOF);
! 105: }
! 106: }
! 107:
! 108: /*
! 109: * check option letter
! 110: */
! 111: if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') ||
! 112: !(oli = strchr(ostr, eoptopt))) {
! 113: /*
! 114: * if the user didn't specify '-' as an option,
! 115: * assume it means EOF when by itself.
! 116: */
! 117: if ((eoptopt == (int)'-') && !*place)
! 118: return (EOF);
! 119: if (strchr(ostr, '#') && (isdigit(eoptopt) ||
! 120: (((eoptopt == (int)'-') || (eoptopt == (int)'+')) &&
! 121: isdigit(*place)))) {
! 122: /*
! 123: * # option: +/- with a number is ok
! 124: */
! 125: for (p = place; *p != '\0'; ++p) {
! 126: if (!isdigit(*p))
! 127: break;
! 128: }
! 129: eoptarg = place-1;
! 130:
! 131: if (*p == '\0') {
! 132: place = EMSG;
! 133: ++eoptind;
! 134: } else {
! 135: place = p;
! 136: savec = *p;
! 137: *place = '\0';
! 138: }
! 139: return (delim);
! 140: }
! 141:
! 142: if (!*place)
! 143: ++eoptind;
! 144: if (eopterr) {
! 145: if (!(p = strrchr(*nargv, '/')))
! 146: p = *nargv;
! 147: else
! 148: ++p;
! 149: (void)fprintf(stderr, "%s: illegal option -- %c\n",
! 150: p, eoptopt);
! 151: }
! 152: return (BADCH);
! 153: }
! 154: if (delim == (int)'+') {
! 155: /*
! 156: * '+' is only allowed with numbers
! 157: */
! 158: if (!*place)
! 159: ++eoptind;
! 160: if (eopterr) {
! 161: if (!(p = strrchr(*nargv, '/')))
! 162: p = *nargv;
! 163: else
! 164: ++p;
! 165: (void)fprintf(stderr,
! 166: "%s: illegal '+' delimiter with option -- %c\n",
! 167: p, eoptopt);
! 168: }
! 169: return (BADCH);
! 170: }
! 171: ++oli;
! 172: if ((*oli != ':') && (*oli != '?')) {
! 173: /*
! 174: * don't need argument
! 175: */
! 176: eoptarg = NULL;
! 177: if (!*place)
! 178: ++eoptind;
! 179: return (eoptopt);
! 180: }
! 181:
! 182: if (*place) {
! 183: /*
! 184: * no white space
! 185: */
! 186: eoptarg = place;
! 187: } else if (*oli == '?') {
! 188: /*
! 189: * no arg, but NOT required
! 190: */
! 191: eoptarg = NULL;
! 192: } else if (nargc <= ++eoptind) {
! 193: /*
! 194: * no arg, but IS required
! 195: */
! 196: place = EMSG;
! 197: if (eopterr) {
! 198: if (!(p = strrchr(*nargv, '/')))
! 199: p = *nargv;
! 200: else
! 201: ++p;
! 202: (void)fprintf(stderr,
! 203: "%s: option requires an argument -- %c\n", p,
! 204: eoptopt);
! 205: }
! 206: return (BADCH);
! 207: } else {
! 208: /*
! 209: * arg has white space
! 210: */
! 211: eoptarg = nargv[eoptind];
! 212: }
! 213: place = EMSG;
! 214: ++eoptind;
! 215: return (eoptopt);
! 216: }
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