1 /* Functions to read locale data files.
2 Copyright (C) 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If
18 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
29 #include "localeinfo.h"
32 static const size_t _nl_category_num_items[] =
34 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
35 [category] = _NL_ITEM_INDEX (_NL_NUM_##category),
36 #include "categories.def"
37 #undef DEFINE_CATEGORY
41 #define NO_PAREN(arg, rest...) arg, ##rest
43 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
44 static const enum value_type _nl_value_type_##category[] = { NO_PAREN items };
45 #define DEFINE_ELEMENT(element, element_name, optstd, type, rest...) \
46 [_NL_ITEM_INDEX (element)] = type,
47 #include "categories.def"
48 #undef DEFINE_CATEGORY
50 static const enum value_type *_nl_value_types[] =
52 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
53 [category] = _nl_value_type_##category,
54 #include "categories.def"
55 #undef DEFINE_CATEGORY
60 _nl_load_locale (struct loaded_l10nfile *file, int category)
66 unsigned int nstrings;
67 unsigned int strindex[0];
70 struct locale_data *newdata;
74 inline unsigned int SWAP (const unsigned int *inw)
76 const unsigned char *inc = (const unsigned char *) inw;
79 return (inc[3] << 24) | (inc[2] << 16) | (inc[1] << 8) | inc[0];
85 fd = __open (file->filename, O_RDONLY);
87 /* Cannot open the file. */
90 if (__fstat (fd, &st) < 0)
92 if (S_ISDIR (st.st_mode))
94 /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
100 newp = (char *) alloca (strlen (file->filename)
101 + 5 + _nl_category_name_sizes[category] + 1);
102 __stpcpy (__stpcpy (__stpcpy (newp, file->filename), "/SYS_"),
103 _nl_category_names[category]);
105 fd = __open (newp, O_RDONLY);
109 if (__fstat (fd, &st) < 0)
113 /* Map in the file's data. */
116 /* Linux seems to lack read-only copy-on-write. */
117 #define MAP_COPY MAP_PRIVATE
120 /* Some systems do not have this flag; it is superfluous. */
124 /* Some systems might lack this; they lose. */
125 #define MAP_INHERIT 0
127 filedata = (void *) __mmap ((caddr_t) 0, st.st_size, PROT_READ,
128 MAP_FILE|MAP_COPY|MAP_INHERIT, fd, 0);
129 if (filedata == (void *) -1)
133 /* No mmap; allocate a buffer and read from the file. */
134 filedata = malloc (st.st_size);
135 if (filedata != NULL)
137 off_t to_read = st.st_size;
139 char *p = (char *) filedata;
142 nread = __read (fd, p, to_read);
147 errno = EINVAL; /* Bizarreness going on. */
162 if (filedata->magic == LIMAGIC (category))
163 /* Good data file in our byte order. */
167 /* Try the other byte order. */
169 if (SWAP (&filedata->magic) != LIMAGIC (category))
170 /* Bad data file in either byte order. */
173 __munmap ((caddr_t) filedata, st.st_size);
180 #define W(word) SWAP (&(word))
182 if (W (filedata->nstrings) < _nl_category_num_items[category] ||
183 (sizeof *filedata + W (filedata->nstrings) * sizeof (unsigned int)
184 >= (unsigned int) st.st_size))
186 /* Insufficient data. */
191 newdata = malloc (sizeof *newdata +
192 (_nl_category_num_items[category]
193 * sizeof (union locale_data_value)));
197 newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */
198 newdata->filedata = (void *) filedata;
199 newdata->filesize = st.st_size;
200 newdata->nstrings = _nl_category_num_items[category];
201 for (cnt = 0; cnt < newdata->nstrings; ++cnt)
203 off_t idx = W (filedata->strindex[cnt]);
204 if (idx >= newdata->filesize)
210 if (_nl_value_types[category][cnt] == word)
211 newdata->values[cnt].word = W (*((u_int32_t *) (newdata->filedata
214 newdata->values[cnt].string = newdata->filedata + idx;
218 file->data = newdata;
222 _nl_free_locale (const struct locale_data *data)
226 /* Ignore a null pointer, like free does. */
228 if (data->name != NULL)
229 free ((void *) data->name);
230 if (__munmap ((caddr_t) data->filedata, data->filesize) < 0)
233 free ((void *) data->filedata);
236 free ((void *) data);