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Annotation of embedaddon/tmux/compat/getopt.c, revision 1.1.1.1

1.1       misho       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: /* OPENBSD ORIGINAL: lib/libc/stdlib/getopt.c */
                     31: 
                     32: #include "compat.h"
                     33: 
                     34: #include <stdio.h>
                     35: #include <stdlib.h>
                     36: #include <string.h>
                     37: 
                     38: int    BSDopterr = 1,          /* if error message should be printed */
                     39:        BSDoptind = 1,          /* index into parent argv vector */
                     40:        BSDoptopt,              /* character checked for validity */
                     41:        BSDoptreset;            /* reset getopt */
                     42: char   *BSDoptarg;             /* argument associated with option */
                     43: 
                     44: #define        BADCH   (int)'?'
                     45: #define        BADARG  (int)':'
                     46: #define        EMSG    ""
                     47: 
                     48: /*
                     49:  * getopt --
                     50:  *     Parse argc/argv argument vector.
                     51:  */
                     52: int
                     53: BSDgetopt(int nargc, char *const *nargv, const char *ostr)
                     54: {
                     55:        static const char *place = EMSG;        /* option letter processing */
                     56:        char *oli;                              /* option letter list index */
                     57: 
                     58:        if (ostr == NULL)
                     59:                return (-1);
                     60: 
                     61:        if (BSDoptreset || !*place) {           /* update scanning pointer */
                     62:                BSDoptreset = 0;
                     63:                if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') {
                     64:                        place = EMSG;
                     65:                        return (-1);
                     66:                }
                     67:                if (place[1] && *++place == '-') {      /* found "--" */
                     68:                        if (place[1])
                     69:                                return (BADCH);
                     70:                        ++BSDoptind;
                     71:                        place = EMSG;
                     72:                        return (-1);
                     73:                }
                     74:        }                                       /* option letter okay? */
                     75:        if ((BSDoptopt = (int)*place++) == (int)':' ||
                     76:            !(oli = strchr(ostr, BSDoptopt))) {
                     77:                /*
                     78:                 * if the user didn't specify '-' as an option,
                     79:                 * assume it means -1.
                     80:                 */
                     81:                if (BSDoptopt == (int)'-')
                     82:                        return (-1);
                     83:                if (!*place)
                     84:                        ++BSDoptind;
                     85:                if (BSDopterr && *ostr != ':')
                     86:                        (void)fprintf(stderr,
                     87:                            "%s: unknown option -- %c\n", getprogname(),
                     88:                            BSDoptopt);
                     89:                return (BADCH);
                     90:        }
                     91:        if (*++oli != ':') {                    /* don't need argument */
                     92:                BSDoptarg = NULL;
                     93:                if (!*place)
                     94:                        ++BSDoptind;
                     95:        }
                     96:        else {                                  /* need an argument */
                     97:                if (*place)                     /* no white space */
                     98:                        BSDoptarg = (char *)place;
                     99:                else if (nargc <= ++BSDoptind) {        /* no arg */
                    100:                        place = EMSG;
                    101:                        if (*ostr == ':')
                    102:                                return (BADARG);
                    103:                        if (BSDopterr)
                    104:                                (void)fprintf(stderr,
                    105:                                    "%s: option requires an argument -- %c\n",
                    106:                                    getprogname(), BSDoptopt);
                    107:                        return (BADCH);
                    108:                }
                    109:                else                            /* white space */
                    110:                        BSDoptarg = nargv[BSDoptind];
                    111:                place = EMSG;
                    112:                ++BSDoptind;
                    113:        }
                    114:        return (BSDoptopt);                     /* dump back option letter */
                    115: }