1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/* Functions to read locale data files.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "localeinfo.h"
const size_t _nl_category_num_items[] =
{
#define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
[category] = _NL_ITEM_INDEX (_NL_NUM_##category),
#include "categories.def"
#undef DEFINE_CATEGORY
};
struct locale_data *
_nl_load_locale (int category, char **name)
{
int fd;
struct
{
unsigned int magic;
unsigned int nstrings;
unsigned int strindex[0];
} *filedata;
struct stat st;
struct locale_data *newdata;
int swap = 0;
inline unsigned int SWAP (const unsigned int *inw)
{
const unsigned char *inc = (const unsigned char *) inw;
if (!swap)
return *inw;
return (inc[3] << 24) | (inc[2] << 16) | (inc[1] << 8) | inc[0];
}
unsigned int i;
if ((*name)[0] == '\0')
{
*name = getenv ("LC_ALL");
if (! *name || (*name)[0] == '\0')
*name = getenv (_nl_category_names[category]);
if (! *name || (*name)[0] == '\0')
*name = getenv ("LANG");
if (! *name || (*name)[0] == '\0')
*name = (char *) "local";
}
{
const char localedir[] = "/share/locale/"; /* XXX */
const char *catname = _nl_category_names[category];
size_t namelen = strlen (*name);
size_t catlen = strlen (catname);
char file[sizeof localedir + namelen + catlen * 2 + 4];
sprintf (file, "%s%s/%s",
strchr (*name, '/') != NULL ? "" : localedir, *name, catname);
fd = __open (file, O_RDONLY);
if (fd < 0)
return NULL;
if (__fstat (fd, &st) < 0)
goto puntfd;
if (S_ISDIR (st.st_mode))
{
/* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
instead. */
__close (fd);
memcpy (stpcpy (strchr (file, '\0'), "SYS_"), catname, catlen);
fd = __open (file, O_RDONLY);
if (fd < 0)
return NULL;
if (__fstat (fd, &st) < 0)
goto puntfd;
}
}
{
/* Map in the file's data. */
int save = errno;
#ifndef MAP_COPY
/* Linux seems to lack read-only copy-on-write. */
#define MAP_COPY MAP_PRIVATE
#endif
filedata = (void *) __mmap ((caddr_t) 0, st.st_size,
PROT_READ, MAP_FILE|MAP_COPY, fd, 0);
if (filedata == (void *) -1)
{
if (errno == ENOSYS)
{
/* No mmap; allocate a buffer and read from the file. */
filedata = malloc (st.st_size);
if (filedata)
{
off_t to_read = st.st_size;
ssize_t nread;
char *p = (char *) filedata;
while (to_read > 0)
{
nread = __read (fd, p, to_read);
if (nread <= 0)
{
free (filedata);
if (nread == 0)
errno = EINVAL; /* Bizarreness going on. */
goto puntfd;
}
p += nread;
to_read -= nread;
}
}
else
goto puntfd;
errno = save;
}
else
goto puntfd;
}
}
if (filedata->magic == LIMAGIC (category))
/* Good data file in our byte order. */
swap = 0;
else
{
/* Try the other byte order. */
swap = 1;
if (SWAP (&filedata->magic) != LIMAGIC (category))
/* Bad data file in either byte order. */
{
puntmap:
__munmap ((caddr_t) filedata, st.st_size);
puntfd:
__close (fd);
return NULL;
}
}
#define W(word) SWAP (&(word))
if (W (filedata->nstrings) < _nl_category_num_items[category] ||
(sizeof *filedata + W (filedata->nstrings) * sizeof (unsigned int)
>= st.st_size))
{
/* Insufficient data. */
errno = EINVAL;
goto puntmap;
}
newdata = malloc (sizeof *newdata +
W (filedata->nstrings) * sizeof (char *));
if (! newdata)
goto puntmap;
newdata->filedata = (void *) filedata;
newdata->filesize = st.st_size;
newdata->nstrings = W (filedata->nstrings);
for (i = 0; i < newdata->nstrings; ++i)
{
unsigned int idx = W (filedata->strindex[i]);
if (idx >= newdata->filesize)
{
free (newdata);
errno = EINVAL;
goto puntmap;
}
newdata->strings[i] = newdata->filedata + idx;
}
__close (fd);
return newdata;
}
void
_nl_free_locale (struct locale_data *data)
{
int save = errno;
if (__munmap ((caddr_t) data->filedata, data->filesize) < 0)
{
if (errno == ENOSYS)
free ((void *) data->filedata);
errno = save;
}
free (data);
}
|
