glibc/intl/loadmsgcat.c
Ulrich Drepper f8f900ecb9 Update
2001-01-04  H.J. Lu  <hjl@gnu.org>

	* elf/dl-support.c (DL_FIND_AUXV): New.  Defined if not defined.
	(_dl_clktck): Declared.
	(non_dynamic_init): Take 3 arguments.
	Set _dl_pagesize, _dl_platform and _dl_clktck from AUX.

2001-01-01  Bruno Haible  <haible@clisp.cons.org>

	Finish implementation of plural form handling.
	* intl/dcigettext.c (known_translation_t): Rename 'domain' field to
	'domainname'.  Remove 'plindex' field. Add 'domain' and
	'translation_length' fields.
	(transcmp): Don't compare 'plindex' fields.
	(plural_lookup): New function.
	(DCIGETTEXT): Change cache handing in the plural case.  Don't call
	plural_eval before the translation and its catalog file have been
	found. Remove plindex from cache key.  Add 'translation_length' and
	'domain' to cache result.
	(_nl_find_msg): Remove index argument, return length of translation
	to the caller instead.  Weaken comparison of string lengths, to account
	for plural entries.  Call iconv() on the entire result string, not
	only on the portion needed so far.
	* intl/loadinfo.h (_nl_find_msg): Remove index argument, add lengthp
	argument.
	* intl/loadmsgcat.c (_nl_load_domain): Adapt to _nl_find_msg change.
2001-01-05 06:43:17 +00:00

441 lines
11 KiB
C

/* Load needed message catalogs.
Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Tell glibc's <string.h> to provide a prototype for mempcpy().
This must come before <config.h> because <config.h> may include
<features.h>, and once <features.h> has been included, it's too late. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#if defined STDC_HEADERS || defined _LIBC
# include <stdlib.h>
#endif
#if defined HAVE_STRING_H || defined _LIBC
# include <string.h>
#else
# include <strings.h>
#endif
#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
#endif
#ifdef _LIBC
# include <langinfo.h>
#endif
#if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \
|| (defined _LIBC && defined _POSIX_MAPPED_FILES)
# include <sys/mman.h>
# undef HAVE_MMAP
# define HAVE_MMAP 1
#else
# undef HAVE_MMAP
#endif
#include "gettext.h"
#include "gettextP.h"
#ifdef _LIBC
# include "../locale/localeinfo.h"
#endif
/* @@ end of prolog @@ */
#ifdef _LIBC
/* Rename the non ISO C functions. This is required by the standard
because some ISO C functions will require linking with this object
file and the name space must not be polluted. */
# define open __open
# define close __close
# define read __read
# define mmap __mmap
# define munmap __munmap
#endif
/* We need a sign, whether a new catalog was loaded, which can be associated
with all translations. This is important if the translations are
cached by one of GCC's features. */
int _nl_msg_cat_cntr;
#if defined __GNUC__ \
|| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
/* These structs are the constant expression for the germanic plural
form determination. It represents the expression "n != 1". */
static const struct expression plvar =
{
.operation = var,
};
static const struct expression plone =
{
.operation = num,
.val =
{
.num = 1
}
};
static struct expression germanic_plural =
{
.operation = not_equal,
.val =
{
.args2 =
{
.left = (struct expression *) &plvar,
.right = (struct expression *) &plone
}
}
};
# define INIT_GERMANIC_PLURAL()
#else
/* For compilers without support for ISO C 99 struct/union initializers:
Initialization at run-time. */
static struct expression plvar;
static struct expression plone;
static struct expression germanic_plural;
static void
init_germanic_plural ()
{
if (plone.val.num == 0)
{
plvar.operation = var;
plone.operation = num;
plone.val.num = 1;
germanic_plural.operation = not_equal;
germanic_plural.val.args2.left = &plvar;
germanic_plural.val.args2.right = &plone;
}
}
# define INIT_GERMANIC_PLURAL() init_germanic_plural ()
#endif
/* Load the message catalogs specified by FILENAME. If it is no valid
message catalog do nothing. */
void
internal_function
_nl_load_domain (domain_file)
struct loaded_l10nfile *domain_file;
{
int fd;
size_t size;
struct stat64 st;
struct mo_file_header *data = (struct mo_file_header *) -1;
int use_mmap = 0;
struct loaded_domain *domain;
char *nullentry;
size_t nullentrylen;
domain_file->decided = 1;
domain_file->data = NULL;
/* If the record does not represent a valid locale the FILENAME
might be NULL. This can happen when according to the given
specification the locale file name is different for XPG and CEN
syntax. */
if (domain_file->filename == NULL)
return;
/* Try to open the addressed file. */
fd = open (domain_file->filename, O_RDONLY);
if (fd == -1)
return;
/* We must know about the size of the file. */
if (__builtin_expect (fstat64 (fd, &st) != 0, 0)
|| __builtin_expect ((size = (size_t) st.st_size) != st.st_size, 0)
|| __builtin_expect (size < sizeof (struct mo_file_header), 0))
{
/* Something went wrong. */
close (fd);
return;
}
#ifdef HAVE_MMAP
/* Now we are ready to load the file. If mmap() is available we try
this first. If not available or it failed we try to load it. */
data = (struct mo_file_header *) mmap (NULL, size, PROT_READ,
MAP_PRIVATE, fd, 0);
if (__builtin_expect (data != (struct mo_file_header *) -1, 1))
{
/* mmap() call was successful. */
close (fd);
use_mmap = 1;
}
#endif
/* If the data is not yet available (i.e. mmap'ed) we try to load
it manually. */
if (data == (struct mo_file_header *) -1)
{
size_t to_read;
char *read_ptr;
data = (struct mo_file_header *) malloc (size);
if (data == NULL)
return;
to_read = size;
read_ptr = (char *) data;
do
{
long int nb = (long int) read (fd, read_ptr, to_read);
if (nb <= 0)
{
#ifdef EINTR
if (nb == -1 && errno == EINTR)
continue;
#endif
close (fd);
return;
}
read_ptr += nb;
to_read -= nb;
}
while (to_read > 0);
close (fd);
}
/* Using the magic number we can test whether it really is a message
catalog file. */
if (__builtin_expect (data->magic != _MAGIC && data->magic != _MAGIC_SWAPPED,
0))
{
/* The magic number is wrong: not a message catalog file. */
#ifdef HAVE_MMAP
if (use_mmap)
munmap ((caddr_t) data, size);
else
#endif
free (data);
return;
}
domain = (struct loaded_domain *) malloc (sizeof (struct loaded_domain));
if (domain == NULL)
return;
domain_file->data = domain;
domain->data = (char *) data;
domain->use_mmap = use_mmap;
domain->mmap_size = size;
domain->must_swap = data->magic != _MAGIC;
/* Fill in the information about the available tables. */
switch (W (domain->must_swap, data->revision))
{
case 0:
domain->nstrings = W (domain->must_swap, data->nstrings);
domain->orig_tab = (struct string_desc *)
((char *) data + W (domain->must_swap, data->orig_tab_offset));
domain->trans_tab = (struct string_desc *)
((char *) data + W (domain->must_swap, data->trans_tab_offset));
domain->hash_size = W (domain->must_swap, data->hash_tab_size);
domain->hash_tab = (nls_uint32 *)
((char *) data + W (domain->must_swap, data->hash_tab_offset));
break;
default:
/* This is an invalid revision. */
#ifdef HAVE_MMAP
if (use_mmap)
munmap ((caddr_t) data, size);
else
#endif
free (data);
free (domain);
domain_file->data = NULL;
return;
}
/* Now find out about the character set the file is encoded with.
This can be found (in textual form) in the entry "". If this
entry does not exist or if this does not contain the `charset='
information, we will assume the charset matches the one the
current locale and we don't have to perform any conversion. */
#ifdef _LIBC
domain->conv = (__gconv_t) -1;
#else
# if HAVE_ICONV
domain->conv = (iconv_t) -1;
# endif
#endif
domain->conv_tab = NULL;
nullentry = _nl_find_msg (domain_file, "", &nullentrylen);
if (nullentry != NULL)
{
#if defined _LIBC || HAVE_ICONV
const char *charsetstr;
charsetstr = strstr (nullentry, "charset=");
if (charsetstr != NULL)
{
size_t len;
char *charset;
const char *outcharset;
charsetstr += strlen ("charset=");
len = strcspn (charsetstr, " \t\n");
charset = (char *) alloca (len + 1);
# if defined _LIBC || HAVE_MEMPCPY
*((char *) mempcpy (charset, charsetstr, len)) = '\0';
# else
memcpy (charset, charsetstr, len);
charset[len] = '\0';
# endif
/* The output charset should normally be determined by the
locale. But sometimes the locale is not used or not correctly
set up, so we provide a possibility for the user to override
this. Moreover, the value specified through
bind_textdomain_codeset overrides both. */
if (domain_file->domainbinding != NULL
&& domain_file->domainbinding->codeset != NULL)
outcharset = domain_file->domainbinding->codeset;
else
{
outcharset = getenv ("OUTPUT_CHARSET");
if (outcharset == NULL || outcharset[0] == '\0')
{
# ifdef _LIBC
outcharset = (*_nl_current[LC_CTYPE])->values[_NL_ITEM_INDEX (CODESET)].string;
# else
# if HAVE_ICONV
extern const char *locale_charset (void);
outcharset = locale_charset ();
if (outcharset == NULL)
outcharset = "";
# endif
# endif
}
}
# ifdef _LIBC
/* We always want to use transliteration. */
outcharset = norm_add_slashes (outcharset, "TRANSLIT");
charset = norm_add_slashes (charset, NULL);
if (__gconv_open (outcharset, charset, &domain->conv,
GCONV_AVOID_NOCONV)
!= __GCONV_OK)
domain->conv = (__gconv_t) -1;
# else
# if HAVE_ICONV
domain->conv = iconv_open (outcharset, charset);
# endif
# endif
}
#endif /* _LIBC || HAVE_ICONV */
}
/* Also look for a plural specification. */
if (nullentry != NULL)
{
const char *plural;
const char *nplurals;
plural = strstr (nullentry, "plural=");
nplurals = strstr (nullentry, "nplurals=");
if (plural == NULL || nplurals == NULL)
goto no_plural;
else
{
/* First get the number. */
char *endp;
struct parse_args args;
nplurals += 9;
while (*nplurals != '\0' && isspace (*nplurals))
++nplurals;
domain->nplurals = strtoul (nplurals, &endp, 10);
if (nplurals == endp)
goto no_plural;
/* Due to the restrictions bison imposes onto the interface of the
scanner function we have to put the input string and the result
passed up from the parser into the same structure which address
is passed down to the parser. */
plural += 7;
args.cp = plural;
if (__gettextparse (&args) != 0)
goto no_plural;
domain->plural = args.res;
}
}
else
{
/* By default we are using the Germanic form: singular form only
for `one', the plural form otherwise. Yes, this is also what
English is using since English is a Germanic language. */
no_plural:
INIT_GERMANIC_PLURAL ();
domain->plural = &germanic_plural;
domain->nplurals = 2;
}
}
#ifdef _LIBC
void
internal_function
_nl_unload_domain (domain)
struct loaded_domain *domain;
{
if (domain->plural != &germanic_plural)
__gettext_free_exp (domain->plural);
if (domain->conv_tab != NULL && domain->conv_tab != (char **) -1)
free (domain->conv_tab);
if (domain->conv != (__gconv_t) -1)
__gconv_close (domain->conv);
# ifdef _POSIX_MAPPED_FILES
if (domain->use_mmap)
munmap ((caddr_t) domain->data, domain->mmap_size);
else
# endif /* _POSIX_MAPPED_FILES */
free ((void *) domain->data);
free (domain);
}
#endif