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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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
73static 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.  */
81static size_t argz_count__ PARAMS ((const char *argz, size_t len));
82
83static size_t
84argz_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.  */
105static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));
106
107static void
108argz_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
127static char *argz_next__ PARAMS ((char *argz, size_t argz_len,
128				  const char *entry));
129
130static char *
131argz_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.  */
155static int pop PARAMS ((int x));
156
157static inline int
158pop (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
171struct 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
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.  */
353const 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
402static char *
403stpcpy (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
412