intl/l10nflist.c

   1 /* Copyright (C) 1995, 1996 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
  19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  20 Cambridge, MA 02139, 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
  46 #if defined STDC_HEADERS || defined _LIBC
  47 # include <stdlib.h>
  48 #endif
  49
  50 #include "loadinfo.h"
  51
  52 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  53 #ifndef NULL
  54 # if defined __STDC__ && __STDC__
  55 #  define NULL ((void *) 0)
  56 # else
  57 #  define NULL 0
  58 # endif
  59 #endif
  60
  61 /* @@ end of prolog @@ */
  62
  63 #ifdef _LIBC
  64 /* Rename the non ANSI C functions.  This is required by the standard
  65    because some ANSI C functions will require linking with this object
  66    file and the name space must not be polluted.  */
  67 # define stpcpy(dest, src) __stpcpy(dest, src)
  68 #else
  69 # ifndef HAVE_STPCPY
  70 static char *stpcpy PARAMS ((char *dest, const char *src));
  71 # endif
  72 #endif
  73
  74 /* Define function which are usually not available.  */
  75
  76 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  77 /* Returns the number of strings in ARGZ.  */
  78 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  79
  80 static size_t
  81 argz_count__ (argz, len)
  82      const char *argz;
  83      size_t len;
  84 {
  85   size_t count = 0;
  86   while (len > 0)
  87     {
  88       size_t part_len = strlen (argz);
  89       argz += part_len + 1;
  90       len -= part_len + 1;
  91       count++;
  92     }
  93   return count;
  94 }
  95 # undef __argz_count
  96 # define __argz_count(argz, len) argz_count__ (argz, len)
  97 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
  98
  99 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
 100 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
 101    except the last into the character SEP.  */
 102 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
 103
 104 static void
 105 argz_stringify__ (argz, len, sep)
 106      char *argz;
 107      size_t len;
 108      int sep;
 109 {
 110   while (len > 0)
 111     {
 112       size_t part_len = strlen (argz);
 113       argz += part_len;
 114       len -= part_len + 1;
 115       if (len > 0)
 116         *argz++ = sep;
 117     }
 118 }
 119 # undef __argz_stringify
 120 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 121 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 122
 123 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 124 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 125                                   const char *entry));
 126
 127 static char *
 128 argz_next__ (argz, argz_len, entry)
 129      char *argz;
 130      size_t argz_len;
 131      const char *entry;
 132 {
 133   if (entry)
 134     {
 135       if (entry < argz + argz_len)
 136         entry = strchr (entry, '\0') + 1;
 137
 138       return entry >= argz + argz_len ? NULL : (char *) entry;
 139     }
 140   else
 141     if (argz_len > 0)
 142       return argz;
 143     else
 144       return 0;
 145 }
 146 # undef __argz_next
 147 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 148 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 149
 150
 151 /* Return number of bits set in X.  */
 152 static int pop PARAMS ((int x));
 153
 154 static inline int
 155 pop (x)
 156      int x;
 157 {
 158   /* We assume that no more than 16 bits are used.  */
 159   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 160   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 161   x = ((x >> 4) + x) & 0x0f0f;
 162   x = ((x >> 8) + x) & 0xff;
 163
 164   return x;
 165 }
 166
 167 \f
 168 struct loaded_l10nfile *
 169 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 170                     territory, codeset, normalized_codeset, modifier, special,
 171                     sponsor, revision, filename, do_allocate)
 172      struct loaded_l10nfile **l10nfile_list;
 173      const char *dirlist;
 174      size_t dirlist_len;
 175      int mask;
 176      const char *language;
 177      const char *territory;
 178      const char *codeset;
 179      const char *normalized_codeset;
 180      const char *modifier;
 181      const char *special;
 182      const char *sponsor;
 183      const char *revision;
 184      const char *filename;
 185      int do_allocate;
 186 {
 187   char *abs_filename;
 188   struct loaded_l10nfile *last = NULL;
 189   struct loaded_l10nfile *retval;
 190   char *cp;
 191   size_t entries;
 192   int cnt;
 193
 194   /* Allocate room for the full file name.  */
 195   abs_filename = (char *) malloc (dirlist_len
 196                                   + strlen (language)
 197                                   + ((mask & TERRITORY) != 0
 198                                      ? strlen (territory) + 1 : 0)
 199                                   + ((mask & XPG_CODESET) != 0
 200                                      ? strlen (codeset) + 1 : 0)
 201                                   + ((mask & XPG_NORM_CODESET) != 0
 202                                      ? strlen (normalized_codeset) + 1 : 0)
 203                                   + (((mask & XPG_MODIFIER) != 0
 204                                       || (mask & CEN_AUDIENCE) != 0) ?
 205                                      strlen (modifier) + 1 : 0)
 206                                   + ((mask & CEN_SPECIAL) != 0
 207                                      ? strlen (special) + 1 : 0)
 208                                   + ((mask & CEN_SPONSOR) != 0
 209                                      ? strlen (sponsor) + 1 : 0)
 210                                   + ((mask & CEN_REVISION) != 0
 211                                      ? strlen (revision) + 1 : 0)
 212                                   + 1 + strlen (filename) + 1);
 213
 214   if (abs_filename == NULL)
 215     return NULL;
 216
 217   retval = NULL;
 218   last = NULL;
 219
 220   /* Construct file name.  */
 221   memcpy (abs_filename, dirlist, dirlist_len);
 222   __argz_stringify (abs_filename, dirlist_len, ':');
 223   cp = abs_filename + (dirlist_len - 1);
 224   *cp++ = '/';
 225   cp = stpcpy (cp, language);
 226
 227   if ((mask & TERRITORY) != 0)
 228     {
 229       *cp++ = '_';
 230       cp = stpcpy (cp, territory);
 231     }
 232   if ((mask & XPG_CODESET) != 0)
 233     {
 234       *cp++ = '.';
 235       cp = stpcpy (cp, codeset);
 236     }
 237   if ((mask & XPG_NORM_CODESET) != 0)
 238     {
 239       *cp++ = '.';
 240       cp = stpcpy (cp, normalized_codeset);
 241     }
 242   if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
 243     {
 244       /* This component can be part of both syntaces but has different
 245          leading characters.  For CEN we use `+', else `@'.  */
 246       *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
 247       cp = stpcpy (cp, modifier);
 248     }
 249   if ((mask & CEN_SPECIAL) != 0)
 250     {
 251       *cp++ = '+';
 252       cp = stpcpy (cp, special);
 253     }
 254   if ((mask & CEN_SPONSOR) != 0)
 255     {
 256       *cp++ = ',';
 257       cp = stpcpy (cp, sponsor);
 258     }
 259   if ((mask & CEN_REVISION) != 0)
 260     {
 261       *cp++ = '_';
 262       cp = stpcpy (cp, revision);
 263     }
 264
 265   *cp++ = '/';
 266   stpcpy (cp, filename);
 267
 268   /* Look in list of already loaded domains whether it is already
 269      available.  */
 270   last = NULL;
 271   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 272     if (retval->filename != NULL)
 273       {
 274         int compare = strcmp (retval->filename, abs_filename);
 275         if (compare == 0)
 276           /* We found it!  */
 277           break;
 278         if (compare < 0)
 279           {
 280             /* It's not in the list.  */
 281             retval = NULL;
 282             break;
 283           }
 284
 285         last = retval;
 286       }
 287
 288   if (retval != NULL || do_allocate == 0)
 289     {
 290       free (abs_filename);
 291       return retval;
 292     }
 293
 294   retval = (struct loaded_l10nfile *)
 295     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 296                                 * (1 << pop (mask))
 297                                 * sizeof (struct loaded_l10nfile *)));
 298   if (retval == NULL)
 299     return NULL;
 300
 301   retval->filename = abs_filename;
 302   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 303                      || ((mask & XPG_CODESET) != 0
 304                          && (mask & XPG_NORM_CODESET) != 0));
 305   retval->data = NULL;
 306
 307   if (last == NULL)
 308     {
 309       retval->next = *l10nfile_list;
 310       *l10nfile_list = retval;
 311     }
 312   else
 313     {
 314       retval->next = last->next;
 315       last->next = retval;
 316     }
 317
 318   entries = 0;
 319   /* If the DIRLIST is a real list the RETVAL entry correcponds not to
 320      a real file.  So we have to use the DIRLIST separation machanism
 321      of the inner loop.  */
 322   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 323   for (; cnt >= 0; --cnt)
 324     if ((cnt & ~mask) == 0
 325         && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
 326         && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
 327       {
 328         /* Iterate over all elements of the DIRLIST.  */
 329         char *dir = NULL;
 330
 331         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 332                != NULL)
 333           retval->successor[entries++]
 334             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 335                                   language, territory, codeset,
 336                                   normalized_codeset, modifier, special,
 337                                   sponsor, revision, filename, 1);
 338       }
 339   retval->successor[entries] = NULL;
 340
 341   return retval;
 342 }
 343 \f
 344 /* Normalize codeset name.  There is no standard for the codeset
 345    names.  Normalization allows the user to use any of the common
 346    names.  */
 347 const char *
 348 _nl_normalize_codeset (codeset, name_len)
 349      const char *codeset;
 350      size_t name_len;
 351 {
 352   int len = 0;
 353   int only_digit = 1;
 354   char *retval;
 355   char *wp;
 356   size_t cnt;
 357
 358   for (cnt = 0; cnt < name_len; ++cnt)
 359     if (isalnum (codeset[cnt]))
 360       {
 361         ++len;
 362
 363         if (isalpha (codeset[cnt]))
 364           only_digit = 0;
 365       }
 366
 367   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 368
 369   if (retval != NULL)
 370     {
 371       if (only_digit)
 372         wp = stpcpy (retval, "ISO");
 373       else
 374         wp = retval;
 375
 376       for (cnt = 0; cnt < name_len; ++cnt)
 377         if (isalpha (codeset[cnt]))
 378           *wp++ = tolower (codeset[cnt]);
 379         else if (isdigit (codeset[cnt]))
 380           *wp++ = codeset[cnt];
 381
 382       *wp = '\0';
 383     }
 384
 385   return (const char *) retval;
 386 }
 387
 388
 389 /* @@ begin of epilog @@ */
 390
 391 /* We don't want libintl.a to depend on any other library.  So we
 392    avoid the non-standard function stpcpy.  In GNU C Library this
 393    function is available, though.  Also allow the symbol HAVE_STPCPY
 394    to be defined.  */
 395 #if !_LIBC && !HAVE_STPCPY
 396 static char *
 397 stpcpy (dest, src)
 398      char *dest;
 399      const char *src;
 400 {
 401   while ((*dest++ = *src++) != '\0')
 402     /* Do nothing. */ ;
 403   return dest - 1;
 404 }
 405 #endif