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1 /* Functions to read locale data files.
2 Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 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 not,
18 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) \
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) \
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) \
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
;
78 fd
= __open (file
->filename
, O_RDONLY
);
80 /* Cannot open the file. */
83 if (__fstat (fd
, &st
) < 0)
85 if (S_ISDIR (st
.st_mode
))
87 /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
93 newp
= (char *) alloca (strlen (file
->filename
)
94 + 5 + _nl_category_name_sizes
[category
] + 1);
95 __stpcpy (__stpcpy (__stpcpy (newp
, file
->filename
), "/SYS_"),
96 _nl_category_names
[category
]);
98 fd
= __open (newp
, O_RDONLY
);
102 if (__fstat (fd
, &st
) < 0)
106 /* Map in the file's data. */
109 /* Linux seems to lack read-only copy-on-write. */
110 #define MAP_COPY MAP_PRIVATE
113 /* Some systems do not have this flag; it is superfluous. */
117 /* Some systems might lack this; they lose. */
118 #define MAP_INHERIT 0
120 filedata
= (void *) __mmap ((caddr_t
) 0, st
.st_size
, PROT_READ
,
121 MAP_FILE
|MAP_COPY
|MAP_INHERIT
, fd
, 0);
122 if ((void *) filedata
== MAP_FAILED
)
126 /* No mmap; allocate a buffer and read from the file. */
128 filedata
= malloc (st
.st_size
);
129 if (filedata
!= NULL
)
131 off_t to_read
= st
.st_size
;
133 char *p
= (char *) filedata
;
136 nread
= __read (fd
, p
, to_read
);
141 __set_errno (EINVAL
); /* Bizarreness going on. */
150 __set_errno (save_err
);
155 else if (st
.st_size
< sizeof (*filedata
))
156 /* This cannot be a locale data file since it's too small. */
159 if (filedata
->magic
!= LIMAGIC (category
))
160 /* Bad data file in either byte order. */
163 __munmap ((caddr_t
) filedata
, st
.st_size
);
169 if (filedata
->nstrings
< _nl_category_num_items
[category
] ||
170 (sizeof *filedata
+ filedata
->nstrings
* sizeof (unsigned int)
171 >= (size_t) st
.st_size
))
173 /* Insufficient data. */
174 __set_errno (EINVAL
);
178 newdata
= malloc (sizeof *newdata
179 + (_nl_category_num_items
[category
]
180 * sizeof (union locale_data_value
)));
184 newdata
->name
= NULL
; /* This will be filled if necessary in findlocale.c. */
185 newdata
->filedata
= (void *) filedata
;
186 newdata
->filesize
= st
.st_size
;
187 newdata
->mmaped
= mmaped
;
188 newdata
->usage_count
= 0;
189 newdata
->nstrings
= _nl_category_num_items
[category
];
190 for (cnt
= 0; cnt
< newdata
->nstrings
; ++cnt
)
192 off_t idx
= filedata
->strindex
[cnt
];
193 if (idx
>= newdata
->filesize
)
196 __set_errno (EINVAL
);
199 if (_nl_value_types
[category
][cnt
] == word
)
200 newdata
->values
[cnt
].word
= *((u_int32_t
*) (newdata
->filedata
+ idx
));
202 newdata
->values
[cnt
].string
= newdata
->filedata
+ idx
;
206 file
->data
= newdata
;
210 _nl_unload_locale (struct locale_data
*locale
)
213 __munmap ((caddr_t
) locale
->filedata
, locale
->filesize
);
215 free ((void *) locale
->filedata
);