intl/l10nflist.c

   1 /* Copyright (C) 1995-2012 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, see
  17    <http://www.gnu.org/licenses/>.  */
  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
  32 #if defined _LIBC || defined HAVE_ARGZ_H
  33 # include <argz.h>
  34 #endif
  35 #include <ctype.h>
  36 #include <sys/types.h>
  37 #include <stdlib.h>
  38
  39 #include "loadinfo.h"
  40
  41 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  42 #ifndef NULL
  43 # if defined __STDC__ && __STDC__
  44 #  define NULL ((void *) 0)
  45 # else
  46 #  define NULL 0
  47 # endif
  48 #endif
  49
  50 /* @@ end of prolog @@ */
  51
  52 #ifdef _LIBC
  53 /* Rename the non ANSI C functions.  This is required by the standard
  54    because some ANSI C functions will require linking with this object
  55    file and the name space must not be polluted.  */
  56 # ifndef stpcpy
  57 #  define stpcpy(dest, src) __stpcpy(dest, src)
  58 # endif
  59 #else
  60 # ifndef HAVE_STPCPY
  61 static char *stpcpy PARAMS ((char *dest, const char *src));
  62 # endif
  63 #endif
  64
  65 /* Define function which are usually not available.  */
  66
  67 #if !defined _LIBC && !defined HAVE___ARGZ_COUNT
  68 /* Returns the number of strings in ARGZ.  */
  69 static size_t argz_count__ PARAMS ((const char *argz, size_t len));
  70
  71 static size_t
  72 argz_count__ (argz, len)
  73      const char *argz;
  74      size_t len;
  75 {
  76   size_t count = 0;
  77   while (len > 0)
  78     {
  79       size_t part_len = strlen (argz);
  80       argz += part_len + 1;
  81       len -= part_len + 1;
  82       count++;
  83     }
  84   return count;
  85 }
  86 # undef __argz_count
  87 # define __argz_count(argz, len) argz_count__ (argz, len)
  88 #endif  /* !_LIBC && !HAVE___ARGZ_COUNT */
  89
  90 #if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY
  91 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
  92    except the last into the character SEP.  */
  93 static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
  94
  95 static void
  96 argz_stringify__ (argz, len, sep)
  97      char *argz;
  98      size_t len;
  99      int sep;
 100 {
 101   while (len > 0)
 102     {
 103       size_t part_len = strlen (argz);
 104       argz += part_len;
 105       len -= part_len + 1;
 106       if (len > 0)
 107         *argz++ = sep;
 108     }
 109 }
 110 # undef __argz_stringify
 111 # define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
 112 #endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */
 113
 114 #if !defined _LIBC && !defined HAVE___ARGZ_NEXT
 115 static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
 116                                   const char *entry));
 117
 118 static char *
 119 argz_next__ (argz, argz_len, entry)
 120      char *argz;
 121      size_t argz_len;
 122      const char *entry;
 123 {
 124   if (entry)
 125     {
 126       if (entry < argz + argz_len)
 127         entry = strchr (entry, '\0') + 1;
 128
 129       return entry >= argz + argz_len ? NULL : (char *) entry;
 130     }
 131   else
 132     if (argz_len > 0)
 133       return argz;
 134     else
 135       return 0;
 136 }
 137 # undef __argz_next
 138 # define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
 139 #endif  /* !_LIBC && !HAVE___ARGZ_NEXT */
 140
 141
 142 /* Return number of bits set in X.  */
 143 #ifndef ARCH_POP
 144 static int pop PARAMS ((int x));
 145
 146 static inline int
 147 pop (x)
 148      int x;
 149 {
 150   /* We assume that no more than 16 bits are used.  */
 151   x = ((x & ~0x5555) >> 1) + (x & 0x5555);
 152   x = ((x & ~0x3333) >> 2) + (x & 0x3333);
 153   x = ((x >> 4) + x) & 0x0f0f;
 154   x = ((x >> 8) + x) & 0xff;
 155
 156   return x;
 157 }
 158 #endif
 159
 160 \f
 161 struct loaded_l10nfile *
 162 _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,
 163                     territory, codeset, normalized_codeset, modifier,
 164                     filename, do_allocate)
 165      struct loaded_l10nfile **l10nfile_list;
 166      const char *dirlist;
 167      size_t dirlist_len;
 168      int mask;
 169      const char *language;
 170      const char *territory;
 171      const char *codeset;
 172      const char *normalized_codeset;
 173      const char *modifier;
 174      const char *filename;
 175      int do_allocate;
 176 {
 177   char *abs_filename;
 178   struct loaded_l10nfile *last = NULL;
 179   struct loaded_l10nfile *retval;
 180   char *cp;
 181   size_t entries;
 182   int cnt;
 183
 184   /* Allocate room for the full file name.  */
 185   abs_filename = (char *) malloc (dirlist_len
 186                                   + strlen (language)
 187                                   + ((mask & XPG_TERRITORY) != 0
 188                                      ? strlen (territory) + 1 : 0)
 189                                   + ((mask & XPG_CODESET) != 0
 190                                      ? strlen (codeset) + 1 : 0)
 191                                   + ((mask & XPG_NORM_CODESET) != 0
 192                                      ? strlen (normalized_codeset) + 1 : 0)
 193                                   + ((mask & XPG_MODIFIER) != 0
 194                                      ? strlen (modifier) + 1 : 0)
 195                                   + 1 + strlen (filename) + 1);
 196
 197   if (abs_filename == NULL)
 198     return NULL;
 199
 200   retval = NULL;
 201   last = NULL;
 202
 203   /* Construct file name.  */
 204   memcpy (abs_filename, dirlist, dirlist_len);
 205   __argz_stringify (abs_filename, dirlist_len, ':');
 206   cp = abs_filename + (dirlist_len - 1);
 207   *cp++ = '/';
 208   cp = stpcpy (cp, language);
 209
 210   if ((mask & XPG_TERRITORY) != 0)
 211     {
 212       *cp++ = '_';
 213       cp = stpcpy (cp, territory);
 214     }
 215   if ((mask & XPG_CODESET) != 0)
 216     {
 217       *cp++ = '.';
 218       cp = stpcpy (cp, codeset);
 219     }
 220   if ((mask & XPG_NORM_CODESET) != 0)
 221     {
 222       *cp++ = '.';
 223       cp = stpcpy (cp, normalized_codeset);
 224     }
 225   if ((mask & XPG_MODIFIER) != 0)
 226     {
 227       *cp++ = '@';
 228       cp = stpcpy (cp, modifier);
 229     }
 230
 231   *cp++ = '/';
 232   stpcpy (cp, filename);
 233
 234   /* Look in list of already loaded domains whether it is already
 235      available.  */
 236   last = NULL;
 237   for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
 238     if (retval->filename != NULL)
 239       {
 240         int compare = strcmp (retval->filename, abs_filename);
 241         if (compare == 0)
 242           /* We found it!  */
 243           break;
 244         if (compare < 0)
 245           {
 246             /* It's not in the list.  */
 247             retval = NULL;
 248             break;
 249           }
 250
 251         last = retval;
 252       }
 253
 254   if (retval != NULL || do_allocate == 0)
 255     {
 256       free (abs_filename);
 257       return retval;
 258     }
 259
 260   retval = (struct loaded_l10nfile *)
 261     malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)
 262                                 * (1 << pop (mask))
 263                                 * sizeof (struct loaded_l10nfile *)));
 264   if (retval == NULL)
 265     {
 266       free (abs_filename);
 267       return NULL;
 268     }
 269
 270   retval->filename = abs_filename;
 271   /* If more than one directory is in the list this is a pseudo-entry
 272      which just references others.  We do not try to load data for it,
 273      ever.  */
 274   retval->decided = (__argz_count (dirlist, dirlist_len) != 1
 275                      || ((mask & XPG_CODESET) != 0
 276                          && (mask & XPG_NORM_CODESET) != 0));
 277   retval->data = NULL;
 278
 279   if (last == NULL)
 280     {
 281       retval->next = *l10nfile_list;
 282       *l10nfile_list = retval;
 283     }
 284   else
 285     {
 286       retval->next = last->next;
 287       last->next = retval;
 288     }
 289
 290   entries = 0;
 291   /* If the DIRLIST is a real list the RETVAL entry corresponds not to
 292      a real file.  So we have to use the DIRLIST separation mechanism
 293      of the inner loop.  */
 294   cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;
 295   for (; cnt >= 0; --cnt)
 296     if ((cnt & ~mask) == 0)
 297       {
 298         /* Iterate over all elements of the DIRLIST.  */
 299         char *dir = NULL;
 300
 301         while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
 302                != NULL)
 303           retval->successor[entries++]
 304             = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,
 305                                   language, territory, codeset,
 306                                   normalized_codeset, modifier, filename, 1);
 307       }
 308   retval->successor[entries] = NULL;
 309
 310   return retval;
 311 }
 312 \f
 313 /* Normalize codeset name.  There is no standard for the codeset
 314    names.  Normalization allows the user to use any of the common
 315    names.  The return value is dynamically allocated and has to be
 316    freed by the caller.  */
 317 const char *
 318 _nl_normalize_codeset (codeset, name_len)
 319      const char *codeset;
 320      size_t name_len;
 321 {
 322   int len = 0;
 323   int only_digit = 1;
 324   char *retval;
 325   char *wp;
 326   size_t cnt;
 327 #ifdef NOT_IN_libc
 328   locale_t locale = newlocale (0, "C", NULL);
 329 #else
 330 # define locale _nl_C_locobj_ptr
 331 #endif
 332
 333   for (cnt = 0; cnt < name_len; ++cnt)
 334     if (__isalnum_l ((unsigned char) codeset[cnt], locale))
 335       {
 336         ++len;
 337
 338         if (! __isdigit_l ((unsigned char) codeset[cnt], locale))
 339           only_digit = 0;
 340       }
 341
 342   retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
 343
 344   if (retval != NULL)
 345     {
 346       wp = retval;
 347       if (only_digit)
 348         wp = stpcpy (wp, "iso");
 349
 350       for (cnt = 0; cnt < name_len; ++cnt)
 351         if (__isalpha_l ((unsigned char) codeset[cnt], locale))
 352           *wp++ = __tolower_l ((unsigned char) codeset[cnt], locale);
 353         else if (__isdigit_l ((unsigned char) codeset[cnt], locale))
 354           *wp++ = codeset[cnt];
 355
 356       *wp = '\0';
 357     }
 358
 359   return (const char *) retval;
 360 }
 361
 362
 363 /* @@ begin of epilog @@ */
 364
 365 /* We don't want libintl.a to depend on any other library.  So we
 366    avoid the non-standard function stpcpy.  In GNU C Library this
 367    function is available, though.  Also allow the symbol HAVE_STPCPY
 368    to be defined.  */
 369 #if !_LIBC && !HAVE_STPCPY
 370 static char *
 371 stpcpy (dest, src)
 372      char *dest;
 373      const char *src;
 374 {
 375   while ((*dest++ = *src++) != '\0')
 376     /* Do nothing. */ ;
 377   return dest - 1;
 378 }
 379 #endif