intl/l10nflist.c

   1 /* Copyright (C) 1995, 1996, 1997, 1998 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.
   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 # ifndef memcpy
  35 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  36 # endif
  37 #endif
  38 #if !HAVE_STRCHR && !defined _LIBC
  39 # ifndef strchr
  40 #  define strchr index
  41 # endif
  42 #endif
  43
  44 #if defined _LIBC || defined HAVE_ARGZ_H
  45 # include <argz.h>
  46 #endif
  47 #include <ctype.h>
  48 #include <sys/types.h>
  49
  50 #if defined STDC_HEADERS || defined _LIBC
  51 # include <stdlib.h>
  52 #endif
  53
  54 #include "loadinfo.h"
  55
  56 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  57 #ifndef NULL
  58 # if defined __STDC__ && __STDC__
  59 #  define NULL ((void *) 0)
  60 # else
  61 #  define NULL 0
  62 # endif
  63 #endif
  64
  65 /* @@ end of prolog @@ */
  66
  67 #ifdef _LIBC
  68 /* Rename the non ANSI C functions.  This is required by the standard
  69    because some ANSI C functions will require linking with this object
  70    file and the name space must not be polluted.  */
  71 # ifndef stpcpy
  72 #  define stpcpy(dest, src) __stpcpy(dest, src)
  73 # endif
  74 #else
  75 # ifndef HAVE_STPCPY
  76 static char *stpcpy PARAMS ((char *dest, const char *src));
  77 # endif
  78 #endif
  79
  80 /* Define function which are usually not available.  */
  81
  82 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  83 /* Returns the number of strings in ARGZ.  */
  84 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  85
  86 static size_t
  87 argz_count__ (argz, len)
  88      const char *argz;
  89      size_t len;
  90 {
  91   size_t count = 0;
  92   while (len > 0)
  93     {
  94       size_t part_len = strlen (argz);
  95       argz += part_len + 1;
  96       len -= part_len + 1;
  97       count++;
  98     }
  99   return count;
 100 }
 101 # undef __argz_count
 102 # define __argz_count(argz, len) argz_count__ (argz, len)
 103 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
 104
 105 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
 106 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
 107    except the last into the character SEP.  */
 108 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
 109
 110 static void
 111 argz_stringify__ (argz, len, sep)
 112      char *argz;
 113      size_t len;
 114      int sep;
 115 {
 116   while (len > 0)
 117     {
 118       size_t part_len = strlen (argz);
 119       argz += part_len;
 120       len -= part_len + 1;
 121       if (len > 0)
 122         *argz++ = sep;
 123     }
 124 }
 125 # undef __argz_stringify
 126 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 127 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 128
 129 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 130 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 131                                   const char *entry));
 132
 133 static char *
 134 argz_next__ (argz, argz_len, entry)
 135      char *argz;
 136      size_t argz_len;
 137      const char *entry;
 138 {
 139   if (entry)
 140     {
 141       if (entry < argz + argz_len)
 142         entry = strchr (entry, '\0') + 1;
 143
 144       return entry >= argz + argz_len ? NULL : (char *) entry;
 145     }
 146   else
 147     if (argz_len > 0)
 148       return argz;
 149     else
 150       return 0;
 151 }
 152 # undef __argz_next
 153 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 154 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 155
 156
 157 /* Return number of bits set in X.  */
 158 static int pop PARAMS ((int x));
 159
 160 static inline int
 161 pop (x)
 162      int x;
 163 {
 164   /* We assume that no more than 16 bits are used.  */
 165   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 166   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 167   x = ((x >> 4) + x) & 0x0f0f;
 168   x = ((x >> 8) + x) & 0xff;
 169
 170   return x;
 171 }
 172
 173 \f
 174 struct loaded_l10nfile *
 175 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 176                     territory, codeset, normalized_codeset, modifier, special,
 177                     sponsor, revision, filename, do_allocate)
 178      struct loaded_l10nfile **l10nfile_list;
 179      const char *dirlist;
 180      size_t dirlist_len;
 181      int mask;
 182      const char *language;
 183      const char *territory;
 184      const char *codeset;
 185      const char *normalized_codeset;
 186      const char *modifier;
 187      const char *special;
 188      const char *sponsor;
 189      const char *revision;
 190      const char *filename;
 191      int do_allocate;
 192 {
 193   char *abs_filename;
 194   struct loaded_l10nfile *last = NULL;
 195   struct loaded_l10nfile *retval;
 196   char *cp;
 197   size_t entries;
 198   int cnt;
 199
 200   /* Allocate room for the full file name.  */
 201   abs_filename = (char *) malloc (dirlist_len
 202                                   + strlen (language)
 203                                   + ((mask & TERRITORY) != 0
 204                                      ? strlen (territory) + 1 : 0)
 205                                   + ((mask & XPG_CODESET) != 0
 206                                      ? strlen (codeset) + 1 : 0)
 207                                   + ((mask & XPG_NORM_CODESET) != 0
 208                                      ? strlen (normalized_codeset) + 1 : 0)
 209                                   + (((mask & XPG_MODIFIER) != 0
 210                                       || (mask & CEN_AUDIENCE) != 0)
 211                                      ? strlen (modifier) + 1 : 0)
 212                                   + ((mask & CEN_SPECIAL) != 0
 213                                      ? strlen (special) + 1 : 0)
 214                                   + (((mask & CEN_SPONSOR) != 0
 215                                       || (mask & CEN_REVISION) != 0)
 216                                      ? (1 + ((mask & CEN_SPONSOR) != 0
 217                                              ? strlen (sponsor) + 1 : 0)
 218                                         + ((mask & CEN_REVISION) != 0
 219                                            ? strlen (revision) + 1 : 0)) : 0)
 220                                   + 1 + strlen (filename) + 1);
 221
 222   if (abs_filename == NULL)
 223     return NULL;
 224
 225   retval = NULL;
 226   last = NULL;
 227
 228   /* Construct file name.  */
 229   memcpy (abs_filename, dirlist, dirlist_len);
 230   __argz_stringify (abs_filename, dirlist_len, ':');
 231   cp = abs_filename + (dirlist_len - 1);
 232   *cp++ = '/';
 233   cp = stpcpy (cp, language);
 234
 235   if ((mask & TERRITORY) != 0)
 236     {
 237       *cp++ = '_';
 238       cp = stpcpy (cp, territory);
 239     }
 240   if ((mask & XPG_CODESET) != 0)
 241     {
 242       *cp++ = '.';
 243       cp = stpcpy (cp, codeset);
 244     }
 245   if ((mask & XPG_NORM_CODESET) != 0)
 246     {
 247       *cp++ = '.';
 248       cp = stpcpy (cp, normalized_codeset);
 249     }
 250   if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
 251     {
 252       /* This component can be part of both syntaces but has different
 253          leading characters.  For CEN we use `+', else `@'.  */
 254       *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
 255       cp = stpcpy (cp, modifier);
 256     }
 257   if ((mask & CEN_SPECIAL) != 0)
 258     {
 259       *cp++ = '+';
 260       cp = stpcpy (cp, special);
 261     }
 262   if ((mask & (CEN_SPONSOR | CEN_REVISION)) != 0)
 263     {
 264       *cp++ = ',';
 265       if ((mask & CEN_SPONSOR) != 0)
 266         cp = stpcpy (cp, sponsor);
 267       if ((mask & CEN_REVISION) != 0)
 268         {
 269           *cp++ = '_';
 270           cp = stpcpy (cp, revision);
 271         }
 272     }
 273
 274   *cp++ = '/';
 275   stpcpy (cp, filename);
 276
 277   /* Look in list of already loaded domains whether it is already
 278      available.  */
 279   last = NULL;
 280   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 281     if (retval->filename != NULL)
 282       {
 283         int compare = strcmp (retval->filename, abs_filename);
 284         if (compare == 0)
 285           /* We found it!  */
 286           break;
 287         if (compare < 0)
 288           {
 289             /* It's not in the list.  */
 290             retval = NULL;
 291             break;
 292           }
 293
 294         last = retval;
 295       }
 296
 297   if (retval != NULL || do_allocate == 0)
 298     {
 299       free (abs_filename);
 300       return retval;
 301     }
 302
 303   retval = (struct loaded_l10nfile *)
 304     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 305                                 * (1 << pop (mask))
 306                                 * sizeof (struct loaded_l10nfile *)));
 307   if (retval == NULL)
 308     return NULL;
 309
 310   retval->filename = abs_filename;
 311   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 312                      || ((mask & XPG_CODESET) != 0
 313                          && (mask & XPG_NORM_CODESET) != 0));
 314   retval->data = NULL;
 315
 316   if (last == NULL)
 317     {
 318       retval->next = *l10nfile_list;
 319       *l10nfile_list = retval;
 320     }
 321   else
 322     {
 323       retval->next = last->next;
 324       last->next = retval;
 325     }
 326
 327   entries = 0;
 328   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 329      a real file.  So we have to use the DIRLIST separation mechanism
 330      of the inner loop.  */
 331   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 332   for (; cnt >= 0; --cnt)
 333     if ((cnt & ~mask) == 0
 334         && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
 335         && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
 336       {
 337         /* Iterate over all elements of the DIRLIST.  */
 338         char *dir = NULL;
 339
 340         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 341                != NULL)
 342           retval->successor[entries++]
 343             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 344                                   language, territory, codeset,
 345                                   normalized_codeset, modifier, special,
 346                                   sponsor, revision, filename, 1);
 347       }
 348   retval->successor[entries] = NULL;
 349
 350   return retval;
 351 }
 352 \f
 353 /* Normalize codeset name.  There is no standard for the codeset
 354    names.  Normalization allows the user to use any of the common
 355    names.  */
 356 const char *
 357 _nl_normalize_codeset (codeset, name_len)
 358      const char *codeset;
 359      size_t name_len;
 360 {
 361   int len = 0;
 362   int only_digit = 1;
 363   char *retval;
 364   char *wp;
 365   size_t cnt;
 366
 367   for (cnt = 0; cnt < name_len; ++cnt)
 368     if (isalnum (codeset[cnt]))
 369       {
 370         ++len;
 371
 372         if (isalpha (codeset[cnt]))
 373           only_digit = 0;
 374       }
 375
 376   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 377
 378   if (retval != NULL)
 379     {
 380       if (only_digit)
 381         wp = stpcpy (retval, "iso");
 382       else
 383         wp = retval;
 384
 385       for (cnt = 0; cnt < name_len; ++cnt)
 386         if (isalpha (codeset[cnt]))
 387           *wp++ = tolower (codeset[cnt]);
 388         else if (isdigit (codeset[cnt]))
 389           *wp++ = codeset[cnt];
 390
 391       *wp = '\0';
 392     }
 393
 394   return (const char *) retval;
 395 }
 396
 397
 398 /* @@ begin of epilog @@ */
 399
 400 /* We don't want libintl.a to depend on any other library.  So we
 401    avoid the non-standard function stpcpy.  In GNU C Library this
 402    function is available, though.  Also allow the symbol HAVE_STPCPY
 403    to be defined.  */
 404 #if !_LIBC && !HAVE_STPCPY
 405 static char *
 406 stpcpy (dest, src)
 407      char *dest;
 408      const char *src;
 409 {
 410   while ((*dest++ = *src++) != '\0')
 411     /* Do nothing. */ ;
 412   return dest - 1;
 413 }
 414 #endif