msvc/getopt.c

   1 /* $PostgreSQL: pgsql/src/port/getopt.c,v 1.11 2007/03/26 21:44:11 momjian Exp $ */
   2
   3 /* This is used by psql under Win32 */
   4
   5 /*
   6  * Copyright (c) 1987, 1993, 1994
   7  *      The Regents of the University of California.  All rights reserved.
   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. 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  */
  32
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 #ifdef _MSC_VER
  37 /* disable the following warnings
  38  * C4706: assignment within conditional expression
  39 */
  40 #pragma warning(disable:4706)
  41 #endif
  42
  43
  44
  45 int                     opterr = 1,                     /* if error message should be printed */
  46                         optind = 1,                     /* index into parent argv vector */
  47                         optopt,                         /* character checked for validity */
  48                         optreset;                       /* reset getopt */
  49 char       *optarg;                             /* argument associated with option */
  50
  51 #define BADCH   (int)'?'
  52 #define BADARG  (int)':'
  53 #define EMSG    ""
  54
  55 /*
  56  * getopt
  57  *      Parse argc/argv argument vector.
  58  */
  59 int
  60 getopt(int nargc, char * const *nargv, const char *ostr)
  61 {
  62         static char *place = EMSG;      /* option letter processing */
  63         char       *oli;                        /* option letter list index */
  64
  65         if (optreset || !*place)
  66         {                                                       /* update scanning pointer */
  67                 optreset = 0;
  68                 if (optind >= nargc || *(place = nargv[optind]) != '-')
  69                 {
  70                         place = EMSG;
  71                         return -1;
  72                 }
  73                 if (place[1] && *++place == '-' && place[1] == '\0')
  74                 {                                               /* found "--" */
  75                         ++optind;
  76                         place = EMSG;
  77                         return -1;
  78                 }
  79         }                                                       /* option letter okay? */
  80         if ((optopt = (int) *place++) == (int) ':' ||
  81                 !(oli = strchr(ostr, optopt)))
  82         {
  83                 /*
  84                  * if the user didn't specify '-' as an option, assume it means -1.
  85                  */
  86                 if (optopt == (int) '-')
  87                         return -1;
  88                 if (!*place)
  89                         ++optind;
  90                 if (opterr && *ostr != ':')
  91                         (void) fprintf(stderr,
  92                                                    "illegal option -- %c\n", optopt);
  93                 return BADCH;
  94         }
  95         if (*++oli != ':')
  96         {                                                       /* don't need argument */
  97                 optarg = NULL;
  98                 if (!*place)
  99                         ++optind;
 100         }
 101         else
 102         {                                                       /* need an argument */
 103                 if (*place)                             /* no white space */
 104                         optarg = place;
 105                 else if (nargc <= ++optind)
 106                 {                                               /* no arg */
 107                         place = EMSG;
 108                         if (*ostr == ':')
 109                                 return BADARG;
 110                         if (opterr)
 111                                 (void) fprintf(stderr,
 112                                                            "option requires an argument -- %c\n",
 113                                                            optopt);
 114                         return BADCH;
 115                 }
 116                 else
 117                         /* white space */
 118                         optarg = nargv[optind];
 119                 place = EMSG;
 120                 ++optind;
 121         }
 122         return optopt;                          /* dump back option letter */
 123 }