intl/l10nflist.c

   1 /* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   2    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   3
   4    This file is part of the GNU C Library.  Its master source is NOT part of
   5    the C library, however.  The master source lives in /gd/gnu/lib.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 # include <config.h>
  24 #endif
  25
  26
  27 #if defined HAVE_STRING_H || defined _LIBC
  28 # ifndef _GNU_SOURCE
  29 #  define _GNU_SOURCE   1
  30 # endif
  31 # include <string.h>
  32 #else
  33 # include <strings.h>
  34 #endif
  35 #if !HAVE_STRCHR && !defined _LIBC
  36 # ifndef strchr
  37 #  define strchr index
  38 # endif
  39 #endif
  40
  41 #if defined _LIBC || defined HAVE_ARGZ_H
  42 # include <argz.h>
  43 #endif
  44 #include <ctype.h>
  45 #include <sys/types.h>
  46
  47 #if defined STDC_HEADERS || defined _LIBC
  48 # include <stdlib.h>
  49 #endif
  50
  51 #include "loadinfo.h"
  52
  53 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  54 #ifndef NULL
  55 # if defined __STDC__ && __STDC__
  56 #  define NULL ((void *) 0)
  57 # else
  58 #  define NULL 0
  59 # endif
  60 #endif
  61
  62 /* @@ end of prolog @@ */
  63
  64 #ifdef _LIBC
  65 /* Rename the non ANSI C functions.  This is required by the standard
  66    because some ANSI C functions will require linking with this object
  67    file and the name space must not be polluted.  */
  68 # define stpcpy(dest, src) __stpcpy(dest, src)
  69 #else
  70 # ifndef HAVE_STPCPY
  71 static char *stpcpy PARAMS ((char *dest, const char *src));
  72 # endif
  73 #endif
  74
  75 /* Define function which are usually not available.  */
  76
  77 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  78 /* Returns the number of strings in ARGZ.  */
  79 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  80
  81 static size_t
  82 argz_count__ (argz, len)
  83      const char *argz;
  84      size_t len;
  85 {
  86   size_t count = 0;
  87   while (len > 0)
  88     {
  89       size_t part_len = strlen (argz);
  90       argz += part_len + 1;
  91       len -= part_len + 1;
  92       count++;
  93     }
  94   return count;
  95 }
  96 # undef __argz_count
  97 # define __argz_count(argz, len) argz_count__ (argz, len)
  98 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
  99
 100 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
 101 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
 102    except the last into the character SEP.  */
 103 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
 104
 105 static void
 106 argz_stringify__ (argz, len, sep)
 107      char *argz;
 108      size_t len;
 109      int sep;
 110 {
 111   while (len > 0)
 112     {
 113       size_t part_len = strlen (argz);
 114       argz += part_len;
 115       len -= part_len + 1;
 116       if (len > 0)
 117         *argz++ = sep;
 118     }
 119 }
 120 # undef __argz_stringify
 121 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 122 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 123
 124 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 125 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 126                                   const char *entry));
 127
 128 static char *
 129 argz_next__ (argz, argz_len, entry)
 130      char *argz;
 131      size_t argz_len;
 132      const char *entry;
 133 {
 134   if (entry)
 135     {
 136       if (entry < argz + argz_len)
 137         entry = strchr (entry, '\0') + 1;
 138
 139       return entry >= argz + argz_len ? NULL : (char *) entry;
 140     }
 141   else
 142     if (argz_len > 0)
 143       return argz;
 144     else
 145       return 0;
 146 }
 147 # undef __argz_next
 148 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 149 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 150
 151
 152 /* Return number of bits set in X.  */
 153 static int pop PARAMS ((int x));
 154
 155 static inline int
 156 pop (x)
 157      int x;
 158 {
 159   /* We assume that no more than 16 bits are used.  */
 160   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 161   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 162   x = ((x >> 4) + x) & 0x0f0f;
 163   x = ((x >> 8) + x) & 0xff;
 164
 165   return x;
 166 }
 167
 168 \f
 169 struct loaded_l10nfile *
 170 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 171                     territory, codeset, normalized_codeset, modifier, special,
 172                     sponsor, revision, filename, do_allocate)
 173      struct loaded_l10nfile **l10nfile_list;
 174      const char *dirlist;
 175      size_t dirlist_len;
 176      int mask;
 177      const char *language;
 178      const char *territory;
 179      const char *codeset;
 180      const char *normalized_codeset;
 181      const char *modifier;
 182      const char *special;
 183      const char *sponsor;
 184      const char *revision;
 185      const char *filename;
 186      int do_allocate;
 187 {
 188   char *abs_filename;
 189   struct loaded_l10nfile *last = NULL;
 190   struct loaded_l10nfile *retval;
 191   char *cp;
 192   size_t entries;
 193   int cnt;
 194
 195   /* Allocate room for the full file name.  */
 196   abs_filename = (char *) malloc (dirlist_len
 197                                   + strlen (language)
 198                                   + ((mask & TERRITORY) != 0
 199                                      ? strlen (territory) + 1 : 0)
 200                                   + ((mask & XPG_CODESET) != 0
 201                                      ? strlen (codeset) + 1 : 0)
 202                                   + ((mask & XPG_NORM_CODESET) != 0
 203                                      ? strlen (normalized_codeset) + 1 : 0)
 204                                   + (((mask & XPG_MODIFIER) != 0
 205                                       || (mask & CEN_AUDIENCE) != 0)
 206                                      ? strlen (modifier) + 1 : 0)
 207                                   + ((mask & CEN_SPECIAL) != 0
 208                                      ? strlen (special) + 1 : 0)
 209                                   + (((mask & CEN_SPONSOR) != 0
 210                                       || (mask & CEN_REVISION) != 0)
 211                                      ? (1 + ((mask & CEN_SPONSOR) != 0
 212                                              ? strlen (sponsor) + 1 : 0)
 213                                         + ((mask & CEN_REVISION) != 0
 214                                            ? strlen (revision) + 1 : 0)) : 0)
 215                                   + 1 + strlen (filename) + 1);
 216
 217   if (abs_filename == NULL)
 218     return NULL;
 219
 220   retval = NULL;
 221   last = NULL;
 222
 223   /* Construct file name.  */
 224   memcpy (abs_filename, dirlist, dirlist_len);
 225   __argz_stringify (abs_filename, dirlist_len, ':');
 226   cp = abs_filename + (dirlist_len - 1);
 227   *cp++ = '/';
 228   cp = stpcpy (cp, language);
 229
 230   if ((mask & TERRITORY) != 0)
 231     {
 232       *cp++ = '_';
 233       cp = stpcpy (cp, territory);
 234     }
 235   if ((mask & XPG_CODESET) != 0)
 236     {
 237       *cp++ = '.';
 238       cp = stpcpy (cp, codeset);
 239     }
 240   if ((mask & XPG_NORM_CODESET) != 0)
 241     {
 242       *cp++ = '.';
 243       cp = stpcpy (cp, normalized_codeset);
 244     }
 245   if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
 246     {
 247       /* This component can be part of both syntaces but has different
 248          leading characters.  For CEN we use `+', else `@'.  */
 249       *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
 250       cp = stpcpy (cp, modifier);
 251     }
 252   if ((mask & CEN_SPECIAL) != 0)
 253     {
 254       *cp++ = '+';
 255       cp = stpcpy (cp, special);
 256     }
 257   if ((mask & (CEN_SPONSOR | CEN_REVISION)) != 0)
 258     {
 259       *cp++ = ',';
 260       if ((mask & CEN_SPONSOR) != 0)
 261         cp = stpcpy (cp, sponsor);
 262       if ((mask & CEN_REVISION) != 0)
 263         {
 264           *cp++ = '_';
 265           cp = stpcpy (cp, revision);
 266         }
 267     }
 268
 269   *cp++ = '/';
 270   stpcpy (cp, filename);
 271
 272   /* Look in list of already loaded domains whether it is already
 273      available.  */
 274   last = NULL;
 275   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 276     if (retval->filename != NULL)
 277       {
 278         int compare = strcmp (retval->filename, abs_filename);
 279         if (compare == 0)
 280           /* We found it!  */
 281           break;
 282         if (compare < 0)
 283           {
 284             /* It's not in the list.  */
 285             retval = NULL;
 286             break;
 287           }
 288
 289         last = retval;
 290       }
 291
 292   if (retval != NULL || do_allocate == 0)
 293     {
 294       free (abs_filename);
 295       return retval;
 296     }
 297
 298   retval = (struct loaded_l10nfile *)
 299     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 300                                 * (1 << pop (mask))
 301                                 * sizeof (struct loaded_l10nfile *)));
 302   if (retval == NULL)
 303     return NULL;
 304
 305   retval->filename = abs_filename;
 306   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 307                      || ((mask & XPG_CODESET) != 0
 308                          && (mask & XPG_NORM_CODESET) != 0));
 309   retval->data = NULL;
 310
 311   if (last == NULL)
 312     {
 313       retval->next = *l10nfile_list;
 314       *l10nfile_list = retval;
 315     }
 316   else
 317     {
 318       retval->next = last->next;
 319       last->next = retval;
 320     }
 321
 322   entries = 0;
 323   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 324      a real file.  So we have to use the DIRLIST separation mechanism
 325      of the inner loop.  */
 326   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 327   for (; cnt >= 0; --cnt)
 328     if ((cnt & ~mask) == 0
 329         && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
 330         && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
 331       {
 332         /* Iterate over all elements of the DIRLIST.  */
 333         char *dir = NULL;
 334
 335         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 336                != NULL)
 337           retval->successor[entries++]
 338             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 339                                   language, territory, codeset,
 340                                   normalized_codeset, modifier, special,
 341                                   sponsor, revision, filename, 1);
 342       }
 343   retval->successor[entries] = NULL;
 344
 345   return retval;
 346 }
 347 \f
 348 /* Normalize codeset name.  There is no standard for the codeset
 349    names.  Normalization allows the user to use any of the common
 350    names.  */
 351 const char *
 352 _nl_normalize_codeset (codeset, name_len)
 353      const char *codeset;
 354      size_t name_len;
 355 {
 356   int len = 0;
 357   int only_digit = 1;
 358   char *retval;
 359   char *wp;
 360   size_t cnt;
 361
 362   for (cnt = 0; cnt < name_len; ++cnt)
 363     if (isalnum (codeset[cnt]))
 364       {
 365         ++len;
 366
 367         if (isalpha (codeset[cnt]))
 368           only_digit = 0;
 369       }
 370
 371   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 372
 373   if (retval != NULL)
 374     {
 375       if (only_digit)
 376         wp = stpcpy (retval, "iso");
 377       else
 378         wp = retval;
 379
 380       for (cnt = 0; cnt < name_len; ++cnt)
 381         if (isalpha (codeset[cnt]))
 382           *wp++ = tolower (codeset[cnt]);
 383         else if (isdigit (codeset[cnt]))
 384           *wp++ = codeset[cnt];
 385
 386       *wp = '\0';
 387     }
 388
 389   return (const char *) retval;
 390 }
 391
 392
 393 /* @@ begin of epilog @@ */
 394
 395 /* We don't want libintl.a to depend on any other library.  So we
 396    avoid the non-standard function stpcpy.  In GNU C Library this
 397    function is available, though.  Also allow the symbol HAVE_STPCPY
 398    to be defined.  */
 399 #if !_LIBC && !HAVE_STPCPY
 400 static char *
 401 stpcpy (dest, src)
 402      char *dest;
 403      const char *src;
 404 {
 405   while ((*dest++ = *src++) != '\0')
 406     /* Do nothing. */ ;
 407   return dest - 1;
 408 }
 409 #endif