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Diffstat (limited to 'intl/loadmsgcat.c')
| -rw-r--r-- | intl/loadmsgcat.c | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/intl/loadmsgcat.c b/intl/loadmsgcat.c new file mode 100644 index 0000000..d589243 --- /dev/null +++ b/intl/loadmsgcat.c @@ -0,0 +1,566 @@ +/* Load needed message catalogs. + Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; 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> + +#ifdef __GNUC__ +# define alloca __builtin_alloca +# define HAVE_ALLOCA 1 +#else +# if defined HAVE_ALLOCA_H || defined _LIBC +# include <alloca.h> +# else +# ifdef _AIX + #pragma alloca +# else +# ifndef alloca +char *alloca (); +# endif +# endif +# endif +#endif + +#include <stdlib.h> +#include <string.h> + +#if defined HAVE_UNISTD_H || defined _LIBC +# include <unistd.h> +#endif + +#ifdef _LIBC +# include <langinfo.h> +# include <locale.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 + +/* Names for the libintl functions are a problem. They must not clash + with existing names and they should follow ANSI C. But this source + code is also used in GNU C Library where the names have a __ + prefix. So we have to make a difference here. */ +#ifdef _LIBC +# define PLURAL_PARSE __gettextparse +#else +# define PLURAL_PARSE gettextparse__ +#endif + +/* For those losing systems which don't have `alloca' we have to add + some additional code emulating it. */ +#ifdef HAVE_ALLOCA +# define freea(p) /* nothing */ +#else +# define alloca(n) malloc (n) +# define freea(p) free (p) +#endif + +/* For systems that distinguish between text and binary I/O. + O_BINARY is usually declared in <fcntl.h>. */ +#if !defined O_BINARY && defined _O_BINARY + /* For MSC-compatible compilers. */ +# define O_BINARY _O_BINARY +# define O_TEXT _O_TEXT +#endif +#ifdef __BEOS__ + /* BeOS 5 has O_BINARY and O_TEXT, but they have no effect. */ +# undef O_BINARY +# undef O_TEXT +#endif +/* On reasonable systems, binary I/O is the default. */ +#ifndef O_BINARY +# define O_BINARY 0 +#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 __APPLE_CC__) \ + || (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 = +{ + .nargs = 0, + .operation = var, +}; +static const struct expression plone = +{ + .nargs = 0, + .operation = num, + .val = + { + .num = 1 + } +}; +static struct expression germanic_plural = +{ + .nargs = 2, + .operation = not_equal, + .val = + { + .args = + { + [0] = (struct expression *) &plvar, + [1] = (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.nargs = 0; + plvar.operation = var; + + plone.nargs = 0; + plone.operation = num; + plone.val.num = 1; + + germanic_plural.nargs = 2; + germanic_plural.operation = not_equal; + germanic_plural.val.args[0] = &plvar; + germanic_plural.val.args[1] = &plone; + } +} + +# define INIT_GERMANIC_PLURAL() init_germanic_plural () + +#endif + + +/* Initialize the codeset dependent parts of an opened message catalog. + Return the header entry. */ +const char * +internal_function +_nl_init_domain_conv (domain_file, domain, domainbinding) + struct loaded_l10nfile *domain_file; + struct loaded_domain *domain; + struct binding *domainbinding; +{ + /* 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. */ + char *nullentry; + size_t nullentrylen; + + /* Preinitialize fields, to avoid recursion during _nl_find_msg. */ + domain->codeset_cntr = + (domainbinding != NULL ? domainbinding->codeset_cntr : 0); +#ifdef _LIBC + domain->conv = (__gconv_t) -1; +#else +# if HAVE_ICONV + domain->conv = (iconv_t) -1; +# endif +#endif + domain->conv_tab = NULL; + + /* Get the header entry. */ + nullentry = _nl_find_msg (domain_file, domainbinding, "", &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 (domainbinding != NULL && domainbinding->codeset != NULL) + outcharset = 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 (); +# 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 + /* When using GNU libiconv, we want to use transliteration. */ +# if _LIBICONV_VERSION >= 0x0105 + len = strlen (outcharset); + { + char *tmp = (char *) alloca (len + 10 + 1); + memcpy (tmp, outcharset, len); + memcpy (tmp + len, "//TRANSLIT", 10 + 1); + outcharset = tmp; + } +# endif + domain->conv = iconv_open (outcharset, charset); +# if _LIBICONV_VERSION >= 0x0105 + freea (outcharset); +# endif +# endif +# endif + + freea (charset); + } +#endif /* _LIBC || HAVE_ICONV */ + } + + return nullentry; +} + +/* Frees the codeset dependent parts of an opened message catalog. */ +void +internal_function +_nl_free_domain_conv (domain) + struct loaded_domain *domain; +{ + if (domain->conv_tab != NULL && domain->conv_tab != (char **) -1) + free (domain->conv_tab); + +#ifdef _LIBC + if (domain->conv != (__gconv_t) -1) + __gconv_close (domain->conv); +#else +# if HAVE_ICONV + if (domain->conv != (iconv_t) -1) + iconv_close (domain->conv); +# endif +#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, domainbinding) + struct loaded_l10nfile *domain_file; + struct binding *domainbinding; +{ + int fd; + size_t size; +#ifdef _LIBC + struct stat64 st; +#else + struct stat st; +#endif + struct mo_file_header *data = (struct mo_file_header *) -1; + int use_mmap = 0; + struct loaded_domain *domain; + const char *nullentry; + + domain_file->decided = 1; + domain_file->data = NULL; + + /* Note that it would be useless to store domainbinding in domain_file + because domainbinding might be == NULL now but != NULL later (after + a call to bind_textdomain_codeset). */ + + /* 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 | O_BINARY); + if (fd == -1) + return; + + /* We must know about the size of the file. */ + if ( +#ifdef _LIBC + __builtin_expect (fstat64 (fd, &st) != 0, 0) +#else + __builtin_expect (fstat (fd, &st) != 0, 0) +#endif + || __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 initialize the character set converter from the character set + the file is encoded with (found in the header entry) to the domain's + specified character set or the locale's character set. */ + nullentry = _nl_init_domain_conv (domain_file, domain, domainbinding); + + /* 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; + unsigned long int n; + struct parse_args args; + + nplurals += 9; + while (*nplurals != '\0' && isspace (*nplurals)) + ++nplurals; +#if defined HAVE_STRTOUL || defined _LIBC + n = strtoul (nplurals, &endp, 10); +#else + for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++) + n = n * 10 + (*endp - '0'); +#endif + domain->nplurals = n; + 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 (PLURAL_PARSE (&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); + + _nl_free_domain_conv (domain); + +# 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 |