intl/l10nflist.c

   1 /* Copyright (C) 1995-1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* Tell glibc's <string.h> to provide a prototype for stpcpy().
  21    This must come before <config.h> because <config.h> may include
  22    <features.h>, and once <features.h> has been included, it's too late.  */
  23 #ifndef _GNU_SOURCE
  24 # define _GNU_SOURCE    1
  25 #endif
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include <config.h>
  29 #endif
  30
  31 #include <string.h>
  32
  33 #if defined _LIBC || defined HAVE_ARGZ_H
  34 # include <argz.h>
  35 #endif
  36 #include <ctype.h>
  37 #include <sys/types.h>
  38 #include <stdlib.h>
  39
  40 #include "loadinfo.h"
  41
  42 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  43 #ifndef NULL
  44 # if defined __STDC__ && __STDC__
  45 #  define NULL ((void *) 0)
  46 # else
  47 #  define NULL 0
  48 # endif
  49 #endif
  50
  51 /* @@ end of prolog @@ */
  52
  53 #ifdef _LIBC
  54 /* Rename the non ANSI C functions.  This is required by the standard
  55    because some ANSI C functions will require linking with this object
  56    file and the name space must not be polluted.  */
  57 # ifndef stpcpy
  58 #  define stpcpy(dest, src) __stpcpy(dest, src)
  59 # endif
  60 #else
  61 # ifndef HAVE_STPCPY
  62 static char *stpcpy PARAMS ((char *dest, const char *src));
  63 # endif
  64 #endif
  65
  66 /* Define function which are usually not available.  */
  67
  68 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  69 /* Returns the number of strings in ARGZ.  */
  70 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  71
  72 static size_t
  73 argz_count__ (argz, len)
  74      const char *argz;
  75      size_t len;
  76 {
  77   size_t count = 0;
  78   while (len > 0)
  79     {
  80       size_t part_len = strlen (argz);
  81       argz += part_len + 1;
  82       len -= part_len + 1;
  83       count++;
  84     }
  85   return count;
  86 }
  87 # undef __argz_count
  88 # define __argz_count(argz, len) argz_count__ (argz, len)
  89 #else
  90 # ifdef _LIBC
  91 #  define __argz_count(argz, len) INTUSE(__argz_count) (argz, len)
  92 # endif
  93 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
  94
  95 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
  96 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
  97    except the last into the character SEP.  */
  98 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
  99
 100 static void
 101 argz_stringify__ (argz, len, sep)
 102      char *argz;
 103      size_t len;
 104      int sep;
 105 {
 106   while (len > 0)
 107     {
 108       size_t part_len = strlen (argz);
 109       argz += part_len;
 110       len -= part_len + 1;
 111       if (len > 0)
 112         *argz++ = sep;
 113     }
 114 }
 115 # undef __argz_stringify
 116 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 117 #else
 118 # ifdef _LIBC
 119 #  define __argz_stringify(argz, len, sep) \
 120   INTUSE(__argz_stringify) (argz, len, sep)
 121 # endif
 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,
 172                     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 *filename;
 183      int do_allocate;
 184 {
 185   char *abs_filename;
 186   struct loaded_l10nfile *last = NULL;
 187   struct loaded_l10nfile *retval;
 188   char *cp;
 189   size_t entries;
 190   int cnt;
 191
 192   /* Allocate room for the full file name.  */
 193   abs_filename = (char *) malloc (dirlist_len
 194                                   + strlen (language)
 195                                   + ((mask & XPG_TERRITORY) != 0
 196                                      ? strlen (territory) + 1 : 0)
 197                                   + ((mask & XPG_CODESET) != 0
 198                                      ? strlen (codeset) + 1 : 0)
 199                                   + ((mask & XPG_NORM_CODESET) != 0
 200                                      ? strlen (normalized_codeset) + 1 : 0)
 201                                   + ((mask & XPG_MODIFIER) != 0
 202                                      ? strlen (modifier) + 1 : 0)
 203                                   + 1 + strlen (filename) + 1);
 204
 205   if (abs_filename == NULL)
 206     return NULL;
 207
 208   retval = NULL;
 209   last = NULL;
 210
 211   /* Construct file name.  */
 212   memcpy (abs_filename, dirlist, dirlist_len);
 213   __argz_stringify (abs_filename, dirlist_len, ':');
 214   cp = abs_filename + (dirlist_len - 1);
 215   *cp++ = '/';
 216   cp = stpcpy (cp, language);
 217
 218   if ((mask & XPG_TERRITORY) != 0)
 219     {
 220       *cp++ = '_';
 221       cp = stpcpy (cp, territory);
 222     }
 223   if ((mask & XPG_CODESET) != 0)
 224     {
 225       *cp++ = '.';
 226       cp = stpcpy (cp, codeset);
 227     }
 228   if ((mask & XPG_NORM_CODESET) != 0)
 229     {
 230       *cp++ = '.';
 231       cp = stpcpy (cp, normalized_codeset);
 232     }
 233   if ((mask & XPG_MODIFIER) != 0)
 234     {
 235       *cp++ = '@';
 236       cp = stpcpy (cp, modifier);
 237     }
 238
 239   *cp++ = '/';
 240   stpcpy (cp, filename);
 241
 242   /* Look in list of already loaded domains whether it is already
 243      available.  */
 244   last = NULL;
 245   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 246     if (retval->filename != NULL)
 247       {
 248         int compare = strcmp (retval->filename, abs_filename);
 249         if (compare == 0)
 250           /* We found it!  */
 251           break;
 252         if (compare < 0)
 253           {
 254             /* It's not in the list.  */
 255             retval = NULL;
 256             break;
 257           }
 258
 259         last = retval;
 260       }
 261
 262   if (retval != NULL || do_allocate == 0)
 263     {
 264       free (abs_filename);
 265       return retval;
 266     }
 267
 268   retval = (struct loaded_l10nfile *)
 269     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 270                                 * (1 << pop (mask))
 271                                 * sizeof (struct loaded_l10nfile *)));
 272   if (retval == NULL)
 273     return NULL;
 274
 275   retval->filename = abs_filename;
 276   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 277                      || ((mask & XPG_CODESET) != 0
 278                          && (mask & XPG_NORM_CODESET) != 0));
 279   retval->data = NULL;
 280
 281   if (last == NULL)
 282     {
 283       retval->next = *l10nfile_list;
 284       *l10nfile_list = retval;
 285     }
 286   else
 287     {
 288       retval->next = last->next;
 289       last->next = retval;
 290     }
 291
 292   entries = 0;
 293   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 294      a real file.  So we have to use the DIRLIST separation mechanism
 295      of the inner loop.  */
 296   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 297   for (; cnt >= 0; --cnt)
 298     if ((cnt & ~mask) == 0)
 299       {
 300         /* Iterate over all elements of the DIRLIST.  */
 301         char *dir = NULL;
 302
 303         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 304                != NULL)
 305           retval->successor[entries++]
 306             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 307                                   language, territory, codeset,
 308                                   normalized_codeset, modifier, filename, 1);
 309       }
 310   retval->successor[entries] = NULL;
 311
 312   return retval;
 313 }
 314 \f
 315 /* Normalize codeset name.  There is no standard for the codeset
 316    names.  Normalization allows the user to use any of the common
 317    names.  The return value is dynamically allocated and has to be
 318    freed by the caller.  */
 319 const char *
 320 _nl_normalize_codeset (codeset, name_len)
 321      const char *codeset;
 322      size_t name_len;
 323 {
 324   int len = 0;
 325   int only_digit = 1;
 326   char *retval;
 327   char *wp;
 328   size_t cnt;
 329
 330   for (cnt = 0; cnt < name_len; ++cnt)
 331     if (isalnum ((unsigned char) codeset[cnt]))
 332       {
 333         ++len;
 334
 335         if (isalpha ((unsigned char) codeset[cnt]))
 336           only_digit = 0;
 337       }
 338
 339   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 340
 341   if (retval != NULL)
 342     {
 343       if (only_digit)
 344         wp = stpcpy (retval, "iso");
 345       else
 346         wp = retval;
 347
 348       for (cnt = 0; cnt < name_len; ++cnt)
 349         if (isalpha ((unsigned char) codeset[cnt]))
 350           *wp++ = tolower ((unsigned char) codeset[cnt]);
 351         else if (isdigit ((unsigned char) codeset[cnt]))
 352           *wp++ = codeset[cnt];
 353
 354       *wp = '\0';
 355     }
 356
 357   return (const char *) retval;
 358 }
 359
 360
 361 /* @@ begin of epilog @@ */
 362
 363 /* We don't want libintl.a to depend on any other library.  So we
 364    avoid the non-standard function stpcpy.  In GNU C Library this
 365    function is available, though.  Also allow the symbol HAVE_STPCPY
 366    to be defined.  */
 367 #if !_LIBC && !HAVE_STPCPY
 368 static char *
 369 stpcpy (dest, src)
 370      char *dest;
 371      const char *src;
 372 {
 373   while ((*dest++ = *src++) != '\0')
 374     /* Do nothing. */ ;
 375   return dest - 1;
 376 }
 377 #endif