loadmsgcat.c
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上传日期:2007-01-04
资源大小:727k
文件大小:6k
- /* Load needed message catalogs.
- Copyright (C) 1995, 1996, 1997, 1998 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. */
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #if defined STDC_HEADERS || defined _LIBC
- # include <stdlib.h>
- #endif
- #if defined HAVE_UNISTD_H || defined _LIBC
- # include <unistd.h>
- #endif
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP) || defined _LIBC
- # include <sys/mman.h>
- #endif
- #include "gettext.h"
- #include "gettextP.h"
- /* @@ 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 = 0;
- /* 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 stat st;
- struct mo_file_header *data = (struct mo_file_header *) -1;
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP)
- || defined _LIBC
- int use_mmap = 0;
- #endif
- struct loaded_domain *domain;
- 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 (fstat (fd, &st) != 0
- || (size = (size_t) st.st_size) != st.st_size
- || size < sizeof (struct mo_file_header))
- {
- /* Something went wrong. */
- close (fd);
- return;
- }
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP)
- || defined _LIBC
- /* 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 (data != (struct mo_file_header *) -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 == -1)
- {
- 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 (data->magic != _MAGIC && data->magic != _MAGIC_SWAPPED)
- {
- /* The magic number is wrong: not a message catalog file. */
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP)
- || defined _LIBC
- if (use_mmap)
- munmap ((caddr_t) data, size);
- else
- #endif
- free (data);
- return;
- }
- domain_file->data
- = (struct loaded_domain *) malloc (sizeof (struct loaded_domain));
- if (domain_file->data == NULL)
- return;
- domain = (struct loaded_domain *) domain_file->data;
- domain->data = (char *) data;
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP)
- || defined _LIBC
- domain->use_mmap = use_mmap;
- #endif
- 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 illegal revision. */
- #if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP)
- || defined _LIBC
- if (use_mmap)
- munmap ((caddr_t) data, size);
- else
- #endif
- free (data);
- free (domain);
- domain_file->data = NULL;
- return;
- }
- /* Show that one domain is changed. This might make some cached
- translations invalid. */
- ++_nl_msg_cat_cntr;
- }
- #ifdef _LIBC
- void
- internal_function
- _nl_unload_domain (domain)
- struct loaded_domain *domain;
- {
- if (domain->use_mmap)
- munmap ((caddr_t) domain->data, domain->mmap_size);
- else
- free ((void *) domain->data);
- free (domain);
- }
- #endif