intl/l10nflist.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23
  24 #if defined HAVE_STRING_H || defined _LIBC
  25 # ifndef _GNU_SOURCE
  26 #  define _GNU_SOURCE   1
  27 # endif
  28 # include <string.h>
  29 #else
  30 # include <strings.h>
  31 # ifndef memcpy
  32 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  33 # endif
  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 # ifndef stpcpy
  69 #  define stpcpy(dest, src) __stpcpy(dest, src)
  70 # endif
  71 #else
  72 # ifndef HAVE_STPCPY
  73 static char *stpcpy PARAMS ((char *dest, const char *src));
  74 # endif
  75 #endif
  76
  77 /* Define function which are usually not available.  */
  78
  79 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  80 /* Returns the number of strings in ARGZ.  */
  81 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  82
  83 static size_t
  84 argz_count__ (argz, len)
  85      const char *argz;
  86      size_t len;
  87 {
  88   size_t count = 0;
  89   while (len > 0)
  90     {
  91       size_t part_len = strlen (argz);
  92       argz += part_len + 1;
  93       len -= part_len + 1;
  94       count++;
  95     }
  96   return count;
  97 }
  98 # undef __argz_count
  99 # define __argz_count(argz, len) argz_count__ (argz, len)
 100 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
 101
 102 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
 103 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
 104    except the last into the character SEP.  */
 105 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
 106
 107 static void
 108 argz_stringify__ (argz, len, sep)
 109      char *argz;
 110      size_t len;
 111      int sep;
 112 {
 113   while (len > 0)
 114     {
 115       size_t part_len = strlen (argz);
 116       argz += part_len;
 117       len -= part_len + 1;
 118       if (len > 0)
 119         *argz++ = sep;
 120     }
 121 }
 122 # undef __argz_stringify
 123 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 124 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 125
 126 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 127 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 128                                   const char *entry));
 129
 130 static char *
 131 argz_next__ (argz, argz_len, entry)
 132      char *argz;
 133      size_t argz_len;
 134      const char *entry;
 135 {
 136   if (entry)
 137     {
 138       if (entry < argz + argz_len)
 139         entry = strchr (entry, '\0') + 1;
 140
 141       return entry >= argz + argz_len ? NULL : (char *) entry;
 142     }
 143   else
 144     if (argz_len > 0)
 145       return argz;
 146     else
 147       return 0;
 148 }
 149 # undef __argz_next
 150 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 151 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 152
 153
 154 /* Return number of bits set in X.  */
 155 static int pop PARAMS ((int x));
 156
 157 static inline int
 158 pop (x)
 159      int x;
 160 {
 161   /* We assume that no more than 16 bits are used.  */
 162   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 163   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 164   x = ((x >> 4) + x) & 0x0f0f;
 165   x = ((x >> 8) + x) & 0xff;
 166
 167   return x;
 168 }
 169
 170 \f
 171 struct loaded_l10nfile *
 172 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 173                     territory, codeset, normalized_codeset, modifier, special,
 174                     sponsor, revision, filename, do_allocate)
 175      struct loaded_l10nfile **l10nfile_list;
 176      const char *dirlist;
 177      size_t dirlist_len;
 178      int mask;
 179      const char *language;
 180      const char *territory;
 181      const char *codeset;
 182      const char *normalized_codeset;
 183      const char *modifier;
 184      const char *special;
 185      const char *sponsor;
 186      const char *revision;
 187      const char *filename;
 188      int do_allocate;
 189 {
 190   char *abs_filename;
 191   struct loaded_l10nfile *last = NULL;
 192   struct loaded_l10nfile *retval;
 193   char *cp;
 194   size_t entries;
 195   int cnt;
 196
 197   /* Allocate room for the full file name.  */
 198   abs_filename = (char *) malloc (dirlist_len
 199                                   + strlen (language)
 200                                   + ((mask & TERRITORY) != 0
 201                                      ? strlen (territory) + 1 : 0)
 202                                   + ((mask & XPG_CODESET) != 0
 203                                      ? strlen (codeset) + 1 : 0)
 204                                   + ((mask & XPG_NORM_CODESET) != 0
 205                                      ? strlen (normalized_codeset) + 1 : 0)
 206                                   + (((mask & XPG_MODIFIER) != 0
 207                                       || (mask & CEN_AUDIENCE) != 0)
 208                                      ? strlen (modifier) + 1 : 0)
 209                                   + ((mask & CEN_SPECIAL) != 0
 210                                      ? strlen (special) + 1 : 0)
 211                                   + (((mask & CEN_SPONSOR) != 0
 212                                       || (mask & CEN_REVISION) != 0)
 213                                      ? (1 + ((mask & CEN_SPONSOR) != 0
 214                                              ? strlen (sponsor) + 1 : 0)
 215                                         + ((mask & CEN_REVISION) != 0
 216                                            ? strlen (revision) + 1 : 0)) : 0)
 217                                   + 1 + strlen (filename) + 1);
 218
 219   if (abs_filename == NULL)
 220     return NULL;
 221
 222   retval = NULL;
 223   last = NULL;
 224
 225   /* Construct file name.  */
 226   memcpy (abs_filename, dirlist, dirlist_len);
 227   __argz_stringify (abs_filename, dirlist_len, ':');
 228   cp = abs_filename + (dirlist_len - 1);
 229   *cp++ = '/';
 230   cp = stpcpy (cp, language);
 231
 232   if ((mask & TERRITORY) != 0)
 233     {
 234       *cp++ = '_';
 235       cp = stpcpy (cp, territory);
 236     }
 237   if ((mask & XPG_CODESET) != 0)
 238     {
 239       *cp++ = '.';
 240       cp = stpcpy (cp, codeset);
 241     }
 242   if ((mask & XPG_NORM_CODESET) != 0)
 243     {
 244       *cp++ = '.';
 245       cp = stpcpy (cp, normalized_codeset);
 246     }
 247   if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
 248     {
 249       /* This component can be part of both syntaces but has different
 250          leading characters.  For CEN we use `+', else `@'.  */
 251       *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
 252       cp = stpcpy (cp, modifier);
 253     }
 254   if ((mask & CEN_SPECIAL) != 0)
 255     {
 256       *cp++ = '+';
 257       cp = stpcpy (cp, special);
 258     }
 259   if ((mask & (CEN_SPONSOR | CEN_REVISION)) != 0)
 260     {
 261       *cp++ = ',';
 262       if ((mask & CEN_SPONSOR) != 0)
 263         cp = stpcpy (cp, sponsor);
 264       if ((mask & CEN_REVISION) != 0)
 265         {
 266           *cp++ = '_';
 267           cp = stpcpy (cp, revision);
 268         }
 269     }
 270
 271   *cp++ = '/';
 272   stpcpy (cp, filename);
 273
 274   /* Look in list of already loaded domains whether it is already
 275      available.  */
 276   last = NULL;
 277   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 278     if (retval->filename != NULL)
 279       {
 280         int compare = strcmp (retval->filename, abs_filename);
 281         if (compare == 0)
 282           /* We found it!  */
 283           break;
 284         if (compare < 0)
 285           {
 286             /* It's not in the list.  */
 287             retval = NULL;
 288             break;
 289           }
 290
 291         last = retval;
 292       }
 293
 294   if (retval != NULL || do_allocate == 0)
 295     {
 296       free (abs_filename);
 297       return retval;
 298     }
 299
 300   retval = (struct loaded_l10nfile *)
 301     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 302                                 * (1 << pop (mask))
 303                                 * sizeof (struct loaded_l10nfile *)));
 304   if (retval == NULL)
 305     return NULL;
 306
 307   retval->filename = abs_filename;
 308   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 309                      || ((mask & XPG_CODESET) != 0
 310                          && (mask & XPG_NORM_CODESET) != 0));
 311   retval->data = NULL;
 312
 313   if (last == NULL)
 314     {
 315       retval->next = *l10nfile_list;
 316       *l10nfile_list = retval;
 317     }
 318   else
 319     {
 320       retval->next = last->next;
 321       last->next = retval;
 322     }
 323
 324   entries = 0;
 325   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 326      a real file.  So we have to use the DIRLIST separation mechanism
 327      of the inner loop.  */
 328   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 329   for (; cnt >= 0; --cnt)
 330     if ((cnt & ~mask) == 0
 331         && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
 332         && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
 333       {
 334         /* Iterate over all elements of the DIRLIST.  */
 335         char *dir = NULL;
 336
 337         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 338                != NULL)
 339           retval->successor[entries++]
 340             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 341                                   language, territory, codeset,
 342                                   normalized_codeset, modifier, special,
 343                                   sponsor, revision, filename, 1);
 344       }
 345   retval->successor[entries] = NULL;
 346
 347   return retval;
 348 }
 349 \f
 350 /* Normalize codeset name.  There is no standard for the codeset
 351    names.  Normalization allows the user to use any of the common
 352    names.  */
 353 const char *
 354 _nl_normalize_codeset (codeset, name_len)
 355      const unsigned char *codeset;
 356      size_t name_len;
 357 {
 358   int len = 0;
 359   int only_digit = 1;
 360   char *retval;
 361   char *wp;
 362   size_t cnt;
 363
 364   for (cnt = 0; cnt < name_len; ++cnt)
 365     if (isalnum (codeset[cnt]))
 366       {
 367         ++len;
 368
 369         if (isalpha (codeset[cnt]))
 370           only_digit = 0;
 371       }
 372
 373   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 374
 375   if (retval != NULL)
 376     {
 377       if (only_digit)
 378         wp = stpcpy (retval, "iso");
 379       else
 380         wp = retval;
 381
 382       for (cnt = 0; cnt < name_len; ++cnt)
 383         if (isalpha (codeset[cnt]))
 384           *wp++ = tolower (codeset[cnt]);
 385         else if (isdigit (codeset[cnt]))
 386           *wp++ = codeset[cnt];
 387
 388       *wp = '\0';
 389     }
 390
 391   return (const char *) retval;
 392 }
 393
 394
 395 /* @@ begin of epilog @@ */
 396
 397 /* We don't want libintl.a to depend on any other library.  So we
 398    avoid the non-standard function stpcpy.  In GNU C Library this
 399    function is available, though.  Also allow the symbol HAVE_STPCPY
 400    to be defined.  */
 401 #if !_LIBC && !HAVE_STPCPY
 402 static char *
 403 stpcpy (dest, src)
 404      char *dest;
 405      const char *src;
 406 {
 407   while ((*dest++ = *src++) != '\0')
 408     /* Do nothing. */ ;
 409   return dest - 1;
 410 }
 411 #endif