Annotation of embedaddon/lrzsz/intl/loadmsgcat.c, revision 1.1.1.1
1.1 misho 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: }
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