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Annotation of embedaddon/tmux/compat/getopt.c, revision 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: }