regress/lib/libc/stdlib/getopt_long/getopt_long.c

   1 /*      $NetBSD: getopt_long.c,v 1.3 2007/06/19 20:44:28 ginsbach Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <err.h>
  33 #include <getopt.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <stdlib.h>
  37 #include <unistd.h>
  38
  39 #define SKIPWS(p)       while (isspace(*p)) p++
  40 #define WS      "\t\n "
  41
  42 int
  43 main(int argc, char *argv[])
  44 {
  45         size_t len, lineno = 0;
  46         char *line, *eptr, *longopt, *ptr, *optstring = NULL, *result = NULL;
  47         char buf[1024];
  48         char *args[128];
  49         char arg[256];
  50         int nargs = -1;
  51         int c;
  52         int nlongopts, maxnlongopts;
  53         int *longopt_flags = NULL;
  54         struct option *longopts = NULL;
  55
  56         while ((line = fparseln(stdin, &len, &lineno, NULL, 0)) != NULL) {
  57                 if (strncmp(line, "optstring:", 10) == 0) {
  58                         if (optstring)
  59                                 free(optstring);
  60                         optstring = strtok(&line[11], WS);
  61                         if (optstring == NULL)
  62                             errx(1, "missing optstring at line %ld",
  63                                 (unsigned long)lineno);
  64                         optstring = strdup(optstring);
  65                 } else if (strncmp(line, "longopts:", 9) == 0) {
  66                         if (longopts) {
  67                                 int i;
  68                                 for (i = 0; i < nlongopts; i++)
  69                                         if (longopts[i].name != NULL)
  70                                                 free(__UNCONST(longopts[i].name));
  71                                 free(longopts);
  72                         }
  73                         if (longopt_flags)
  74                                 free(longopt_flags);
  75                         nlongopts = 0;
  76                         ptr = strtok(&line[10], WS);
  77                         if (ptr == NULL)
  78                                 errx(1, "missing longopts at line %ld",
  79                                     (unsigned long)lineno);
  80                         maxnlongopts = strtoul(ptr, &eptr, 10);
  81                         if (*eptr != '\0')
  82                                 warnx("garbage in longopts at line %ld",
  83                                     (unsigned long)lineno);
  84                         maxnlongopts++;         /* space for trailer */
  85                         longopts =
  86                             (struct option *)calloc(sizeof(struct option),
  87                                                     maxnlongopts);
  88                         if (longopts == NULL)
  89                                 err(1, "calloc");
  90                         longopt_flags = (int *)calloc(sizeof(int), maxnlongopts);
  91                         if (longopt_flags == NULL)
  92                                 err(1, "calloc");
  93                 } else if (strncmp(line, "longopt:", 8) == 0) {
  94                         if (longopts == NULL)
  95                                 errx(1, "longopt: without longopts at line %ld",
  96                                     (unsigned long)lineno);
  97                         if (nlongopts >= maxnlongopts)
  98                                 errx(1, "longopt: too many options at line %ld",
  99                                     (unsigned long)lineno);
 100                         /* name */
 101                         ptr = &line[9];
 102                         SKIPWS(ptr);
 103                         longopt = strsep(&ptr, ",");
 104                         if (longopt == NULL)
 105                                 errx(1, "missing longopt at line %ld",
 106                                     (unsigned long)lineno);
 107                         longopts[nlongopts].name = strdup(longopt);
 108                         /* has_arg */
 109                         SKIPWS(ptr);
 110                         longopt = strsep(&ptr, ",");
 111                         if (*longopt != '\0') {
 112                                 if (strncmp(longopt, "0", 1) == 0 ||
 113                                     strncmp(longopt, "no_argument", 2) == 0)
 114                                         longopts[nlongopts].has_arg = no_argument;
 115                                 else if (strncmp(longopt, "1", 1) == 0 ||
 116                                          strncmp(longopt, "required_argument", 8) == 0)
 117                                         longopts[nlongopts].has_arg = required_argument;
 118                                 else if (strncmp(longopt, "2", 1) == 0 ||
 119                                          strncmp(longopt, "optional_argument", 8) == 0)
 120                                         longopts[nlongopts].has_arg = optional_argument;
 121                                 else
 122                                         errx(1, "unknown has_arg %s at line %ld",
 123                                             longopt, (unsigned long)lineno);
 124                         }
 125                         /* flag */
 126                         SKIPWS(ptr);
 127                         longopt = strsep(&ptr, ",");
 128                         if (*longopt != '\0' &&
 129                             strncmp(longopt, "NULL", 4) != 0)
 130                                 longopts[nlongopts].flag = &longopt_flags[nlongopts];
 131                         /* val */
 132                         SKIPWS(ptr);
 133                         longopt = strsep(&ptr, ",");
 134                         if (*longopt == '\0')
 135                                 errx(1, "missing val at line %ld",
 136                                     (unsigned long)lineno);
 137                         if (*longopt != '\'') {
 138                                 longopts[nlongopts].val =
 139                                     (int)strtoul(longopt, &eptr, 10);
 140                                 if (*eptr != '\0')
 141                                         errx(1, "invalid val at line %ld",
 142                                             (unsigned long)lineno);
 143                         } else
 144                                 longopts[nlongopts].val = (int)longopt[1];
 145                         nlongopts++;
 146                 } else if (strncmp(line, "args:", 5) == 0) {
 147                         for (; nargs >= 0; nargs--) {
 148                                 if (args[nargs] != NULL)
 149                                         free(args[nargs]);
 150                         }
 151                         args[nargs = 0] = strtok(&line[6], WS);
 152                         if (args[nargs] == NULL)
 153                                 errx(1, "Missing args");
 154
 155                         args[nargs] = strdup(args[nargs]);
 156                         while ((args[++nargs] = strtok(NULL, WS)) != NULL)
 157                                 args[nargs] = strdup(args[nargs]);
 158                 } else if (strncmp(line, "result:", 7) == 0) {
 159                         int li;
 160                         buf[0] = '\0';
 161                         optind = optreset = 1;
 162                         if (result)
 163                                 free(result);
 164                         result = strtok(&line[8], WS);
 165                         if (result == NULL)
 166                                 errx(1, "missing result at line %ld",
 167                                     (unsigned long)lineno);
 168                         if (optstring == NULL)
 169                                 errx(1, "result: without optstring");
 170                         if (longopts == NULL || nlongopts == 0)
 171                                 errx(1, "result: without longopts");
 172                         result = strdup(result);
 173                         if (nargs == -1)
 174                                 errx(1, "result: without args");
 175                         li = -2;
 176                         while ((c = getopt_long(nargs, args, optstring,
 177                                         longopts, &li)) != -1)  {
 178                                 if (c == ':')
 179                                         errx(1, "`:' found as argument char");
 180                                 if (li == -2) {
 181                                         ptr = strchr(optstring, c);
 182                                         if (ptr == NULL) {
 183                                                 snprintf(arg, sizeof(arg),
 184                                                     "!%c,", c);
 185                                                 strcat(buf, arg);
 186                                                 continue;
 187                                         }
 188                                         if (ptr[1] != ':')
 189                                                 snprintf(arg, sizeof(arg),
 190                                                     "%c,", c);
 191                                         else
 192                                                 snprintf(arg, sizeof(arg),
 193                                                     "%c=%s,", c, optarg);
 194                                 } else {
 195                                         switch (longopts[li].has_arg) {
 196                                         case no_argument:
 197                                                 snprintf(arg, sizeof(arg), "-%s,",
 198                                                     longopts[li].name);
 199                                                 break;
 200                                         case required_argument:
 201                                                 snprintf(arg, sizeof(arg),
 202                                                     "-%s=%s,",
 203                                                     longopts[li].name, optarg);
 204                                                 break;
 205                                         case optional_argument:
 206                                                 snprintf(arg, sizeof(arg),
 207                                                     "-%s%s%s,",
 208                                                     longopts[li].name,
 209                                                     (optarg)? "=" : "",
 210                                                     (optarg)? optarg : "");
 211                                                 break;
 212                                         default:
 213                                                 errx(1, "internal error");
 214                                         }
 215                                 }
 216                                 strcat(buf, arg);
 217                                 li = -2;
 218                         }
 219                         len = strlen(buf);
 220                         if (len > 0) {
 221                                 buf[len - 1] = '|';
 222                                 buf[len] = '\0';
 223                         } else {
 224                                 buf[0] = '|';
 225                                 buf[1] = '\0';
 226                         }
 227                         snprintf(arg, sizeof(arg), "%d", nargs - optind);
 228                         strcat(buf, arg);
 229                         if (strcmp(buf, result) != 0)
 230                                 errx(1, "`%s' != `%s'", buf, result);
 231                 } else
 232                         errx(1, "unknown directive at line %ld",
 233                             (unsigned long)lineno);
 234                 free(line);
 235         }
 236         return 0;
 237 }