Commit | Line | Data |
---|---|---|
7421c9f1 TT |
1 | /* Load needed message catalogs |
2 | Copyright (C) 1995, 1996, 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 <fcntl.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | ||
26 | #if defined STDC_HEADERS || defined _LIBC | |
27 | # include <stdlib.h> | |
28 | #endif | |
29 | ||
30 | #if defined HAVE_UNISTD_H || defined _LIBC | |
31 | # include <unistd.h> | |
32 | #endif | |
33 | ||
34 | #if (defined HAVE_MMAP && defined HAVE_MUNMAP) || defined _LIBC | |
35 | # include <sys/mman.h> | |
36 | #endif | |
37 | ||
38 | #include "gettext.h" | |
39 | #include "gettextP.h" | |
40 | ||
41 | /* @@ end of prolog @@ */ | |
42 | ||
43 | #ifdef _LIBC | |
44 | /* Rename the non ISO C functions. This is required by the standard | |
45 | because some ISO C functions will require linking with this object | |
46 | file and the name space must not be polluted. */ | |
47 | # define fstat __fstat | |
48 | # define open __open | |
49 | # define close __close | |
50 | # define read __read | |
51 | # define mmap __mmap | |
52 | # define munmap __munmap | |
53 | #endif | |
54 | ||
55 | /* We need a sign, whether a new catalog was loaded, which can be associated | |
56 | with all translations. This is important if the translations are | |
57 | cached by one of GCC's features. */ | |
58 | int _nl_msg_cat_cntr = 0; | |
59 | ||
60 | ||
61 | /* Load the message catalogs specified by FILENAME. If it is no valid | |
62 | message catalog do nothing. */ | |
63 | void | |
64 | _nl_load_domain (domain_file) | |
65 | struct loaded_l10nfile *domain_file; | |
66 | { | |
67 | int fd; | |
68 | struct stat st; | |
69 | struct mo_file_header *data = (struct mo_file_header *) -1; | |
70 | #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \ | |
71 | || defined _LIBC | |
72 | int use_mmap = 0; | |
73 | #endif | |
74 | struct loaded_domain *domain; | |
75 | ||
76 | domain_file->decided = 1; | |
77 | domain_file->data = NULL; | |
78 | ||
79 | /* If the record does not represent a valid locale the FILENAME | |
80 | might be NULL. This can happen when according to the given | |
81 | specification the locale file name is different for XPG and CEN | |
82 | syntax. */ | |
83 | if (domain_file->filename == NULL) | |
84 | return; | |
85 | ||
86 | /* Try to open the addressed file. */ | |
87 | fd = open (domain_file->filename, O_RDONLY); | |
88 | if (fd == -1) | |
89 | return; | |
90 | ||
91 | /* We must know about the size of the file. */ | |
92 | if (fstat (fd, &st) != 0 | |
93 | && st.st_size < (off_t) sizeof (struct mo_file_header)) | |
94 | { | |
95 | /* Something went wrong. */ | |
96 | close (fd); | |
97 | return; | |
98 | } | |
99 | ||
100 | #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \ | |
101 | || defined _LIBC | |
102 | /* Now we are ready to load the file. If mmap() is available we try | |
103 | this first. If not available or it failed we try to load it. */ | |
104 | data = (struct mo_file_header *) mmap (NULL, st.st_size, PROT_READ, | |
105 | MAP_PRIVATE, fd, 0); | |
106 | ||
107 | if (data != (struct mo_file_header *) -1) | |
108 | { | |
109 | /* mmap() call was successful. */ | |
110 | close (fd); | |
111 | use_mmap = 1; | |
112 | } | |
113 | #endif | |
114 | ||
115 | /* If the data is not yet available (i.e. mmap'ed) we try to load | |
116 | it manually. */ | |
117 | if (data == (struct mo_file_header *) -1) | |
118 | { | |
119 | off_t to_read; | |
120 | char *read_ptr; | |
121 | ||
122 | data = (struct mo_file_header *) malloc (st.st_size); | |
123 | if (data == NULL) | |
124 | return; | |
125 | ||
126 | to_read = st.st_size; | |
127 | read_ptr = (char *) data; | |
128 | do | |
129 | { | |
130 | long int nb = (long int) read (fd, read_ptr, to_read); | |
131 | if (nb == -1) | |
132 | { | |
133 | close (fd); | |
134 | return; | |
135 | } | |
136 | ||
137 | read_ptr += nb; | |
138 | to_read -= nb; | |
139 | } | |
140 | while (to_read > 0); | |
141 | ||
142 | close (fd); | |
143 | } | |
144 | ||
145 | /* Using the magic number we can test whether it really is a message | |
146 | catalog file. */ | |
147 | if (data->magic != _MAGIC && data->magic != _MAGIC_SWAPPED) | |
148 | { | |
149 | /* The magic number is wrong: not a message catalog file. */ | |
150 | #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \ | |
151 | || defined _LIBC | |
152 | if (use_mmap) | |
153 | munmap ((caddr_t) data, st.st_size); | |
154 | else | |
155 | #endif | |
156 | free (data); | |
157 | return; | |
158 | } | |
159 | ||
160 | domain_file->data | |
161 | = (struct loaded_domain *) malloc (sizeof (struct loaded_domain)); | |
162 | if (domain_file->data == NULL) | |
163 | return; | |
164 | ||
165 | domain = (struct loaded_domain *) domain_file->data; | |
166 | domain->data = (char *) data; | |
167 | domain->must_swap = data->magic != _MAGIC; | |
168 | ||
169 | /* Fill in the information about the available tables. */ | |
170 | switch (W (domain->must_swap, data->revision)) | |
171 | { | |
172 | case 0: | |
173 | domain->nstrings = W (domain->must_swap, data->nstrings); | |
174 | domain->orig_tab = (struct string_desc *) | |
175 | ((char *) data + W (domain->must_swap, data->orig_tab_offset)); | |
176 | domain->trans_tab = (struct string_desc *) | |
177 | ((char *) data + W (domain->must_swap, data->trans_tab_offset)); | |
178 | domain->hash_size = W (domain->must_swap, data->hash_tab_size); | |
179 | domain->hash_tab = (nls_uint32 *) | |
180 | ((char *) data + W (domain->must_swap, data->hash_tab_offset)); | |
181 | break; | |
182 | default: | |
183 | /* This is an illegal revision. */ | |
184 | #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \ | |
185 | || defined _LIBC | |
186 | if (use_mmap) | |
187 | munmap ((caddr_t) data, st.st_size); | |
188 | else | |
189 | #endif | |
190 | free (data); | |
191 | free (domain); | |
192 | domain_file->data = NULL; | |
193 | return; | |
194 | } | |
195 | ||
196 | /* Show that one domain is changed. This might make some cached | |
197 | translations invalid. */ | |
198 | ++_nl_msg_cat_cntr; | |
199 | } |