intl/l10nflist.c

   1 /* Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
   2    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU Library General Public License as published
   6    by the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17    USA.  */
  18
  19 /* Tell glibc's <string.h> to provide a prototype for stpcpy().
  20    This must come before <config.h> because <config.h> may include
  21    <features.h>, and once <features.h> has been included, it's too late.  */
  22 #ifndef _GNU_SOURCE
  23 # define _GNU_SOURCE    1
  24 #endif
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include <config.h>
  28 #endif
  29
  30 #include <string.h>
  31 #if !HAVE_STRCHR && !defined _LIBC
  32 # ifndef strchr
  33 #  define strchr index
  34 # endif
  35 #endif
  36
  37 #if defined _LIBC || defined HAVE_ARGZ_H
  38 # include <argz.h>
  39 #endif
  40 #include <ctype.h>
  41 #include <sys/types.h>
  42 #include <stdlib.h>
  43
  44 #include "loadinfo.h"
  45
  46 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  47 #ifndef NULL
  48 # if defined __STDC__ && __STDC__
  49 #  define NULL ((void *) 0)
  50 # else
  51 #  define NULL 0
  52 # endif
  53 #endif
  54
  55 /* @@ end of prolog @@ */
  56
  57 #ifdef _LIBC
  58 /* Rename the non ANSI C functions.  This is required by the standard
  59    because some ANSI C functions will require linking with this object
  60    file and the name space must not be polluted.  */
  61 # ifndef stpcpy
  62 #  define stpcpy(dest, src) __stpcpy(dest, src)
  63 # endif
  64 #else
  65 # ifndef HAVE_STPCPY
  66 static char *stpcpy PARAMS ((char *dest, const char *src));
  67 # endif
  68 #endif
  69
  70 /* Define function which are usually not available.  */
  71
  72 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  73 /* Returns the number of strings in ARGZ.  */
  74 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  75
  76 static size_t
  77 argz_count__ (argz, len)
  78      const char *argz;
  79      size_t len;
  80 {
  81   size_t count = 0;
  82   while (len > 0)
  83     {
  84       size_t part_len = strlen (argz);
  85       argz += part_len + 1;
  86       len -= part_len + 1;
  87       count++;
  88     }
  89   return count;
  90 }
  91 # undef __argz_count
  92 # define __argz_count(argz, len) argz_count__ (argz, len)
  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 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 118
 119 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 120 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 121                                   const char *entry));
 122
 123 static char *
 124 argz_next__ (argz, argz_len, entry)
 125      char *argz;
 126      size_t argz_len;
 127      const char *entry;
 128 {
 129   if (entry)
 130     {
 131       if (entry < argz + argz_len)
 132         entry = strchr (entry, '\0') + 1;
 133
 134       return entry >= argz + argz_len ? NULL : (char *) entry;
 135     }
 136   else
 137     if (argz_len > 0)
 138       return argz;
 139     else
 140       return 0;
 141 }
 142 # undef __argz_next
 143 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 144 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 145
 146
 147 /* Return number of bits set in X.  */
 148 static int pop PARAMS ((int x));
 149
 150 static inline int
 151 pop (x)
 152      int x;
 153 {
 154   /* We assume that no more than 16 bits are used.  */
 155   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 156   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 157   x = ((x >> 4) + x) & 0x0f0f;
 158   x = ((x >> 8) + x) & 0xff;
 159
 160   return x;
 161 }
 162
 163 \f
 164 struct loaded_l10nfile *
 165 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 166                     territory, codeset, normalized_codeset, modifier, special,
 167                     sponsor, revision, filename, do_allocate)
 168      struct loaded_l10nfile **l10nfile_list;
 169      const char *dirlist;
 170      size_t dirlist_len;
 171      int mask;
 172      const char *language;
 173      const char *territory;
 174      const char *codeset;
 175      const char *normalized_codeset;
 176      const char *modifier;
 177      const char *special;
 178      const char *sponsor;
 179      const char *revision;
 180      const char *filename;
 181      int do_allocate;
 182 {
 183   char *abs_filename;
 184   struct loaded_l10nfile *last = NULL;
 185   struct loaded_l10nfile *retval;
 186   char *cp;
 187   size_t entries;
 188   int cnt;
 189
 190   /* Allocate room for the full file name.  */
 191   abs_filename = (char *) malloc (dirlist_len
 192                                   + strlen (language)
 193                                   + ((mask & TERRITORY) != 0
 194                                      ? strlen (territory) + 1 : 0)
 195                                   + ((mask & XPG_CODESET) != 0
 196                                      ? strlen (codeset) + 1 : 0)
 197                                   + ((mask & XPG_NORM_CODESET) != 0
 198                                      ? strlen (normalized_codeset) + 1 : 0)
 199                                   + (((mask & XPG_MODIFIER) != 0
 200                                       || (mask & CEN_AUDIENCE) != 0)
 201                                      ? strlen (modifier) + 1 : 0)
 202                                   + ((mask & CEN_SPECIAL) != 0
 203                                      ? strlen (special) + 1 : 0)
 204                                   + (((mask & CEN_SPONSOR) != 0
 205                                       || (mask & CEN_REVISION) != 0)
 206                                      ? (1 + ((mask & CEN_SPONSOR) != 0
 207                                              ? strlen (sponsor) + 1 : 0)
 208                                         + ((mask & CEN_REVISION) != 0
 209                                            ? strlen (revision) + 1 : 0)) : 0)
 210                                   + 1 + strlen (filename) + 1);
 211
 212   if (abs_filename == NULL)
 213     return NULL;
 214
 215   retval = NULL;
 216   last = NULL;
 217
 218   /* Construct file name.  */
 219   memcpy (abs_filename, dirlist, dirlist_len);
 220   __argz_stringify (abs_filename, dirlist_len, PATH_SEPARATOR);
 221   cp = abs_filename + (dirlist_len - 1);
 222   *cp++ = '/';
 223   cp = stpcpy (cp, language);
 224
 225   if ((mask & TERRITORY) != 0)
 226     {
 227       *cp++ = '_';
 228       cp = stpcpy (cp, territory);
 229     }
 230   if ((mask & XPG_CODESET) != 0)
 231     {
 232       *cp++ = '.';
 233       cp = stpcpy (cp, codeset);
 234     }
 235   if ((mask & XPG_NORM_CODESET) != 0)
 236     {
 237       *cp++ = '.';
 238       cp = stpcpy (cp, normalized_codeset);
 239     }
 240   if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
 241     {
 242       /* This component can be part of both syntaces but has different
 243          leading characters.  For CEN we use `+', else `@'.  */
 244       *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
 245       cp = stpcpy (cp, modifier);
 246     }
 247   if ((mask & CEN_SPECIAL) != 0)
 248     {
 249       *cp++ = '+';
 250       cp = stpcpy (cp, special);
 251     }
 252   if ((mask & (CEN_SPONSOR | CEN_REVISION)) != 0)
 253     {
 254       *cp++ = ',';
 255       if ((mask & CEN_SPONSOR) != 0)
 256         cp = stpcpy (cp, sponsor);
 257       if ((mask & CEN_REVISION) != 0)
 258         {
 259           *cp++ = '_';
 260           cp = stpcpy (cp, revision);
 261         }
 262     }
 263
 264   *cp++ = '/';
 265   stpcpy (cp, filename);
 266
 267   /* Look in list of already loaded domains whether it is already
 268      available.  */
 269   last = NULL;
 270   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 271     if (retval->filename != NULL)
 272       {
 273         int compare = strcmp (retval->filename, abs_filename);
 274         if (compare == 0)
 275           /* We found it!  */
 276           break;
 277         if (compare < 0)
 278           {
 279             /* It's not in the list.  */
 280             retval = NULL;
 281             break;
 282           }
 283
 284         last = retval;
 285       }
 286
 287   if (retval != NULL || do_allocate == 0)
 288     {
 289       free (abs_filename);
 290       return retval;
 291     }
 292
 293   retval = (struct loaded_l10nfile *)
 294     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 295                                 * (1 << pop (mask))
 296                                 * sizeof (struct loaded_l10nfile *)));
 297   if (retval == NULL)
 298     return NULL;
 299
 300   retval->filename = abs_filename;
 301   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 302                      || ((mask & XPG_CODESET) != 0
 303                          && (mask & XPG_NORM_CODESET) != 0));
 304   retval->data = NULL;
 305
 306   if (last == NULL)
 307     {
 308       retval->next = *l10nfile_list;
 309       *l10nfile_list = retval;
 310     }
 311   else
 312     {
 313       retval->next = last->next;
 314       last->next = retval;
 315     }
 316
 317   entries = 0;
 318   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 319      a real file.  So we have to use the DIRLIST separation mechanism
 320      of the inner loop.  */
 321   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 322   for (; cnt >= 0; --cnt)
 323     if ((cnt & ~mask) == 0
 324         && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
 325         && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
 326       {
 327         /* Iterate over all elements of the DIRLIST.  */
 328         char *dir = NULL;
 329
 330         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 331                != NULL)
 332           retval->successor[entries++]
 333             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 334                                   language, territory, codeset,
 335                                   normalized_codeset, modifier, special,
 336                                   sponsor, revision, filename, 1);
 337       }
 338   retval->successor[entries] = NULL;
 339
 340   return retval;
 341 }
 342 \f
 343 /* Normalize codeset name.  There is no standard for the codeset
 344    names.  Normalization allows the user to use any of the common
 345    names.  The return value is dynamically allocated and has to be
 346    freed by the caller.  */
 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