gnu/dist/grep/intl/explodename.c

   1 /*      $NetBSD$        */
   2
   3 /* Copyright (C) 1995-1998, 2000, 2001 Free Software Foundation, Inc.
   4    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   5
   6    This program is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU Library General Public License as published
   8    by the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19    USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28
  29 #include "loadinfo.h"
  30
  31 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  32 #ifndef NULL
  33 # if defined __STDC__ && __STDC__
  34 #  define NULL ((void *) 0)
  35 # else
  36 #  define NULL 0
  37 # endif
  38 #endif
  39
  40 /* @@ end of prolog @@ */
  41
  42 char *
  43 _nl_find_language (name)
  44      const char *name;
  45 {
  46   while (name[0] != '\0' && name[0] != '_' && name[0] != '@'
  47          && name[0] != '+' && name[0] != ',')
  48     ++name;
  49
  50   return (char *) name;
  51 }
  52
  53
  54 int
  55 _nl_explode_name (name, language, modifier, territory, codeset,
  56                   normalized_codeset, special, sponsor, revision)
  57      char *name;
  58      const char **language;
  59      const char **modifier;
  60      const char **territory;
  61      const char **codeset;
  62      const char **normalized_codeset;
  63      const char **special;
  64      const char **sponsor;
  65      const char **revision;
  66 {
  67   enum { undecided, xpg, cen } syntax;
  68   char *cp;
  69   int mask;
  70
  71   *modifier = NULL;
  72   *territory = NULL;
  73   *codeset = NULL;
  74   *normalized_codeset = NULL;
  75   *special = NULL;
  76   *sponsor = NULL;
  77   *revision = NULL;
  78
  79   /* Now we determine the single parts of the locale name.  First
  80      look for the language.  Termination symbols are `_' and `@' if
  81      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
  82   mask = 0;
  83   syntax = undecided;
  84   *language = cp = name;
  85   cp = _nl_find_language (*language);
  86
  87   if (*language == cp)
  88     /* This does not make sense: language has to be specified.  Use
  89        this entry as it is without exploding.  Perhaps it is an alias.  */
  90     cp = strchr (*language, '\0');
  91   else if (cp[0] == '_')
  92     {
  93       /* Next is the territory.  */
  94       cp[0] = '\0';
  95       *territory = ++cp;
  96
  97       while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@'
  98              && cp[0] != '+' && cp[0] != ',' && cp[0] != '_')
  99         ++cp;
 100
 101       mask |= TERRITORY;
 102
 103       if (cp[0] == '.')
 104         {
 105           /* Next is the codeset.  */
 106           syntax = xpg;
 107           cp[0] = '\0';
 108           *codeset = ++cp;
 109
 110           while (cp[0] != '\0' && cp[0] != '@')
 111             ++cp;
 112
 113           mask |= XPG_CODESET;
 114
 115           if (*codeset != cp && (*codeset)[0] != '\0')
 116             {
 117               *normalized_codeset = _nl_normalize_codeset (*codeset,
 118                                                            cp - *codeset);
 119               if (strcmp (*codeset, *normalized_codeset) == 0)
 120                 free ((char *) *normalized_codeset);
 121               else
 122                 mask |= XPG_NORM_CODESET;
 123             }
 124         }
 125     }
 126
 127   if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
 128     {
 129       /* Next is the modifier.  */
 130       syntax = cp[0] == '@' ? xpg : cen;
 131       cp[0] = '\0';
 132       *modifier = ++cp;
 133
 134       while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
 135              && cp[0] != ',' && cp[0] != '_')
 136         ++cp;
 137
 138       mask |= XPG_MODIFIER | CEN_AUDIENCE;
 139     }
 140
 141   if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
 142     {
 143       syntax = cen;
 144
 145       if (cp[0] == '+')
 146         {
 147           /* Next is special application (CEN syntax).  */
 148           cp[0] = '\0';
 149           *special = ++cp;
 150
 151           while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
 152             ++cp;
 153
 154           mask |= CEN_SPECIAL;
 155         }
 156
 157       if (cp[0] == ',')
 158         {
 159           /* Next is sponsor (CEN syntax).  */
 160           cp[0] = '\0';
 161           *sponsor = ++cp;
 162
 163           while (cp[0] != '\0' && cp[0] != '_')
 164             ++cp;
 165
 166           mask |= CEN_SPONSOR;
 167         }
 168
 169       if (cp[0] == '_')
 170         {
 171           /* Next is revision (CEN syntax).  */
 172           cp[0] = '\0';
 173           *revision = ++cp;
 174
 175           mask |= CEN_REVISION;
 176         }
 177     }
 178
 179   /* For CEN syntax values it might be important to have the
 180      separator character in the file name, not for XPG syntax.  */
 181   if (syntax == xpg)
 182     {
 183       if (*territory != NULL && (*territory)[0] == '\0')
 184         mask &= ~TERRITORY;
 185
 186       if (*codeset != NULL && (*codeset)[0] == '\0')
 187         mask &= ~XPG_CODESET;
 188
 189       if (*modifier != NULL && (*modifier)[0] == '\0')
 190         mask &= ~XPG_MODIFIER;
 191     }
 192
 193   return mask;
 194 }