1 /* Compatibility code for gettext-using-catgets interface.
2 Copyright (C) 1995, 1997 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 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
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21
22 #include <stdio.h>
23
24 #ifdef STDC_HEADERS
25 # include <stdlib.h>
26 # include <string.h>
27 #else
28 char *getenv ();
29 # ifdef HAVE_MALLOC_H
30 # include <malloc.h>
31 # endif
32 #endif
33
34 #ifdef HAVE_NL_TYPES_H
35 # include <nl_types.h>
36 #endif
37
38 #include "libgettext.h"
39
40 /* @@ end of prolog @@ */
41
42 /* XPG3 defines the result of `setlocale (category, NULL)' as:
43 ``Directs `setlocale()' to query `category' and return the current
44 setting of `local'.''
45 However it does not specify the exact format. And even worse: POSIX
46 defines this not at all. So we can use this feature only on selected
47 system (e.g. those using GNU C Library). */
48 #ifdef _LIBC
49 # define HAVE_LOCALE_NULL
50 #endif
51
52 /* The catalog descriptor. */
53 static nl_catd catalog = (nl_catd) -1;
54
55 /* Name of the default catalog. */
56 static const char default_catalog_name[] = "messages";
57
58 /* Name of currently used catalog. */
59 static const char *catalog_name = default_catalog_name;
60
61 /* Get ID for given string. If not found return -1. */
62 static int msg_to_cat_id PARAMS ((const char *msg));
63
64 /* Substitution for systems lacking this function in their C library. */
65 #if !_LIBC && !HAVE_STPCPY
66 static char *stpcpy PARAMS ((char *dest, const char *src));
67 #endif
68
69
70 /* Set currently used domain/catalog. */
71 char *
textdomain(domainname)72 textdomain (domainname)
73 const char *domainname;
74 {
75 nl_catd new_catalog;
76 char *new_name;
77 size_t new_name_len;
78 char *lang;
79
80 #if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES \
81 && defined HAVE_LOCALE_NULL
82 lang = setlocale (LC_MESSAGES, NULL);
83 #else
84 lang = getenv ("LC_ALL");
85 if (lang == NULL || lang[0] == '\0')
86 {
87 lang = getenv ("LC_MESSAGES");
88 if (lang == NULL || lang[0] == '\0')
89 lang = getenv ("LANG");
90 }
91 #endif
92 if (lang == NULL || lang[0] == '\0')
93 lang = "C";
94
95 /* See whether name of currently used domain is asked. */
96 if (domainname == NULL)
97 return (char *) catalog_name;
98
99 if (domainname[0] == '\0')
100 domainname = default_catalog_name;
101
102 /* Compute length of added path element. */
103 new_name_len = sizeof (LOCALEDIR) - 1 + 1 + strlen (lang)
104 + sizeof ("/LC_MESSAGES/") - 1 + sizeof (PACKAGE) - 1
105 + sizeof (".cat");
106
107 new_name = (char *) malloc (new_name_len);
108 if (new_name == NULL)
109 return NULL;
110
111 strcpy (new_name, PACKAGE);
112 new_catalog = catopen (new_name, 0);
113
114 if (new_catalog == (nl_catd) -1)
115 {
116 /* NLSPATH search didn't work, try absolute path */
117 sprintf (new_name, "%s/%s/LC_MESSAGES/%s.cat", LOCALEDIR, lang,
118 PACKAGE);
119 new_catalog = catopen (new_name, 0);
120
121 if (new_catalog == (nl_catd) -1)
122 {
123 free (new_name);
124 return (char *) catalog_name;
125 }
126 }
127
128 /* Close old catalog. */
129 if (catalog != (nl_catd) -1)
130 catclose (catalog);
131 if (catalog_name != default_catalog_name)
132 free ((char *) catalog_name);
133
134 catalog = new_catalog;
135 catalog_name = new_name;
136
137 return (char *) catalog_name;
138 }
139
140 char *
bindtextdomain(domainname,dirname)141 bindtextdomain (domainname, dirname)
142 const char *domainname;
143 const char *dirname;
144 {
145 #if HAVE_SETENV || HAVE_PUTENV
146 char *old_val, *new_val, *cp;
147 size_t new_val_len;
148
149 /* This does not make much sense here but to be compatible do it. */
150 if (domainname == NULL)
151 return NULL;
152
153 /* Compute length of added path element. If we use setenv we don't need
154 the first byts for NLSPATH=, but why complicate the code for this
155 peanuts. */
156 new_val_len = sizeof ("NLSPATH=") - 1 + strlen (dirname)
157 + sizeof ("/%L/LC_MESSAGES/%N.cat");
158
159 old_val = getenv ("NLSPATH");
160 if (old_val == NULL || old_val[0] == '\0')
161 {
162 old_val = NULL;
163 new_val_len += 1 + sizeof (LOCALEDIR) - 1
164 + sizeof ("/%L/LC_MESSAGES/%N.cat");
165 }
166 else
167 new_val_len += strlen (old_val);
168
169 new_val = (char *) malloc (new_val_len);
170 if (new_val == NULL)
171 return NULL;
172
173 # if HAVE_SETENV
174 cp = new_val;
175 # else
176 cp = stpcpy (new_val, "NLSPATH=");
177 # endif
178
179 cp = stpcpy (cp, dirname);
180 cp = stpcpy (cp, "/%L/LC_MESSAGES/%N.cat:");
181
182 if (old_val == NULL)
183 {
184 # if __STDC__
185 stpcpy (cp, LOCALEDIR "/%L/LC_MESSAGES/%N.cat");
186 # else
187
188 cp = stpcpy (cp, LOCALEDIR);
189 stpcpy (cp, "/%L/LC_MESSAGES/%N.cat");
190 # endif
191 }
192 else
193 stpcpy (cp, old_val);
194
195 # if HAVE_SETENV
196 setenv ("NLSPATH", new_val, 1);
197 free (new_val);
198 # else
199 putenv (new_val);
200 /* Do *not* free the environment entry we just entered. It is used
201 from now on. */
202 # endif
203
204 #endif
205
206 return (char *) domainname;
207 }
208
209 #undef gettext
210 char *
gettext(msg)211 gettext (msg)
212 const char *msg;
213 {
214 int msgid;
215
216 if (msg == NULL || catalog == (nl_catd) -1)
217 return (char *) msg;
218
219 /* Get the message from the catalog. We always use set number 1.
220 The message ID is computed by the function `msg_to_cat_id'
221 which works on the table generated by `po-to-tbl'. */
222 msgid = msg_to_cat_id (msg);
223 if (msgid == -1)
224 return (char *) msg;
225
226 return catgets (catalog, 1, msgid, (char *) msg);
227 }
228
229 /* Look through the table `_msg_tbl' which has `_msg_tbl_length' entries
230 for the one equal to msg. If it is found return the ID. In case when
231 the string is not found return -1. */
232 static int
msg_to_cat_id(msg)233 msg_to_cat_id (msg)
234 const char *msg;
235 {
236 int cnt;
237
238 for (cnt = 0; cnt < _msg_tbl_length; ++cnt)
239 if (strcmp (msg, _msg_tbl[cnt]._msg) == 0)
240 return _msg_tbl[cnt]._msg_number;
241
242 return -1;
243 }
244
245
246 /* @@ begin of epilog @@ */
247
248 /* We don't want libintl.a to depend on any other library. So we
249 avoid the non-standard function stpcpy. In GNU C Library this
250 function is available, though. Also allow the symbol HAVE_STPCPY
251 to be defined. */
252 #if !_LIBC && !HAVE_STPCPY
253 static char *
stpcpy(dest,src)254 stpcpy (dest, src)
255 char *dest;
256 const char *src;
257 {
258 while ((*dest++ = *src++) != '\0')
259 /* Do nothing. */ ;
260 return dest - 1;
261 }
262 #endif
263