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Annotation of embedaddon/libnet/sample/win32/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. 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: 
                     34: #if defined(LIBC_SCCS) && !defined(lint)
                     35: static char sccsid[] = "@(#)getopt.c   8.3 (Berkeley) 4/27/95";
                     36: #endif /* LIBC_SCCS and not lint */
                     37: 
                     38: #include <stdio.h>
                     39: #include <stdlib.h>
                     40: #include <string.h>
                     41: 
                     42: int    opterr = 1,             /* if error message should be printed */
                     43:        optind = 1,             /* index into parent argv vector */
                     44:        optopt,                 /* character checked for validity */
                     45:        optreset;               /* reset getopt */
                     46: char   *optarg;                /* argument associated with option */
                     47: 
                     48: #define        BADCH   (int)'?'
                     49: #define        BADARG  (int)':'
                     50: #define        EMSG    ""
                     51: 
                     52: /*
                     53:  * getopt --
                     54:  *     Parse argc/argv argument vector.
                     55:  */
                     56: int
                     57: getopt(nargc, nargv, ostr)
                     58:        int nargc;
                     59:        char * const *nargv;
                     60:        const char *ostr;
                     61: {
                     62: #ifdef WIN32
                     63:        char *__progname="windump";
                     64: #else
                     65:        extern char *__progname;
                     66: #endif
                     67:        static char *place = EMSG;              /* option letter processing */
                     68:        char *oli;                              /* option letter list index */
                     69: 
                     70:        if (optreset || !*place) {              /* update scanning pointer */
                     71:                optreset = 0;
                     72:                if (optind >= nargc || *(place = nargv[optind]) != '-') {
                     73:                        place = EMSG;
                     74:                        return (-1);
                     75:                }
                     76:                if (place[1] && *++place == '-') {      /* found "--" */
                     77:                        ++optind;
                     78:                        place = EMSG;
                     79:                        return (-1);
                     80:                }
                     81:        }                                       /* option letter okay? */
                     82:        if ((optopt = (int)*place++) == (int)':' ||
                     83:            !(oli = strchr(ostr, optopt))) {
                     84:                /*
                     85:                 * if the user didn't specify '-' as an option,
                     86:                 * assume it means -1.
                     87:                 */
                     88:                if (optopt == (int)'-')
                     89:                        return (-1);
                     90:                if (!*place)
                     91:                        ++optind;
                     92:                if (opterr && *ostr != ':')
                     93:                        (void)fprintf(stderr,
                     94:                            "%s: illegal option -- %c\n", __progname, optopt);
                     95:                return (BADCH);
                     96:        }
                     97:        if (*++oli != ':') {                    /* don't need argument */
                     98:                optarg = NULL;
                     99:                if (!*place)
                    100:                        ++optind;
                    101:        }
                    102:        else {                                  /* need an argument */
                    103:                if (*place)                     /* no white space */
                    104:                        optarg = place;
                    105:                else if (nargc <= ++optind) {   /* no arg */
                    106:                        place = EMSG;
                    107:                        if (*ostr == ':')
                    108:                                return (BADARG);
                    109:                        if (opterr)
                    110:                                (void)fprintf(stderr,
                    111:                                    "%s: option requires an argument -- %c\n",
                    112:                                    __progname, optopt);
                    113:                        return (BADCH);
                    114:                }
                    115:                else                            /* white space */
                    116:                        optarg = nargv[optind];
                    117:                place = EMSG;
                    118:                ++optind;
                    119:        }
                    120:        return (optopt);                        /* dump back option letter */
                    121: }