/* Implementation of the bindtextdomain(3) function Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. This program 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, 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <stddef.h> #include <stdlib.h> #include <string.h> #ifdef _LIBC # include <libintl.h> #else # include "libgnuintl.h" #endif #include "gettextP.h" #ifdef _LIBC /* We have to handle multi-threaded applications. */ # include <bits/libc-lock.h> #else /* Provide dummy implementation if this is outside glibc. */ # define __libc_rwlock_define(CLASS, NAME) # define __libc_rwlock_wrlock(NAME) # define __libc_rwlock_unlock(NAME) #endif /* The internal variables in the standalone libintl.a must have different names than the internal variables in GNU libc, otherwise programs using libintl.a cannot be linked statically. */ #if !defined _LIBC # define _nl_default_dirname libintl_nl_default_dirname # define _nl_domain_bindings libintl_nl_domain_bindings #endif /* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>. */ #ifndef offsetof # define offsetof(type,ident) ((size_t)&(((type*)0)->ident)) #endif /* @@ end of prolog @@ */ /* Contains the default location of the message catalogs. */ extern const char _nl_default_dirname[]; #ifdef _LIBC extern const char _nl_default_dirname_internal[] attribute_hidden; #else # define INTUSE(name) name #endif /* List with bindings of specific domains. */ extern struct binding *_nl_domain_bindings; /* Lock variable to protect the global data in the gettext implementation. */ __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) /* 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 BINDTEXTDOMAIN __bindtextdomain # define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset # ifndef strdup # define strdup(str) __strdup (str) # endif #else # define BINDTEXTDOMAIN libintl_bindtextdomain # define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset #endif /* Prototypes for local functions. */ static void set_binding_values PARAMS ((const char *domainname, const char **dirnamep, const char **codesetp)); /* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP to be used for the DOMAINNAME message catalog. If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not modified, only the current value is returned. If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither modified nor returned. */ static void set_binding_values (domainname, dirnamep, codesetp) const char *domainname; const char **dirnamep; const char **codesetp; { struct binding *binding; int modified; /* Some sanity checks. */ if (domainname == NULL || domainname[0] == '\0') { if (dirnamep) *dirnamep = NULL; if (codesetp) *codesetp = NULL; return; } __libc_rwlock_wrlock (_nl_state_lock); modified = 0; for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next) { int compare = strcmp (domainname, binding->domainname); if (compare == 0) /* We found it! */ break; if (compare < 0) { /* It is not in the list. */ binding = NULL; break; } } if (binding != NULL) { if (dirnamep) { const char *dirname = *dirnamep; if (dirname == NULL) /* The current binding has be to returned. */ *dirnamep = binding->dirname; else { /* The domain is already bound. If the new value and the old one are equal we simply do nothing. Otherwise replace the old binding. */ char *result = binding->dirname; if (strcmp (dirname, result) != 0) { if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) result = (char *) INTUSE(_nl_default_dirname); else { #if defined _LIBC || defined HAVE_STRDUP result = strdup (dirname); #else size_t len = strlen (dirname) + 1; result = (char *) malloc (len); if (__builtin_expect (result != NULL, 1)) memcpy (result, dirname, len); #endif } if (__builtin_expect (result != NULL, 1)) { if (binding->dirname != INTUSE(_nl_default_dirname)) free (binding->dirname); binding->dirname = result; modified = 1; } } *dirnamep = result; } } if (codesetp) { const char *codeset = *codesetp; if (codeset == NULL) /* The current binding has be to returned. */ *codesetp = binding->codeset; else { /* The domain is already bound. If the new value and the old one are equal we simply do nothing. Otherwise replace the old binding. */ char *result = binding->codeset; if (result == NULL || strcmp (codeset, result) != 0) { #if defined _LIBC || defined HAVE_STRDUP result = strdup (codeset); #else size_t len = strlen (codeset) + 1; result = (char *) malloc (len); if (__builtin_expect (result != NULL, 1)) memcpy (result, codeset, len); #endif if (__builtin_expect (result != NULL, 1)) { if (binding->codeset != NULL) free (binding->codeset); binding->codeset = result; binding->codeset_cntr++; modified = 1; } } *codesetp = result; } } } else if ((dirnamep == NULL || *dirnamep == NULL) && (codesetp == NULL || *codesetp == NULL)) { /* Simply return the default values. */ if (dirnamep) *dirnamep = INTUSE(_nl_default_dirname); if (codesetp) *codesetp = NULL; } else { /* We have to create a new binding. */ size_t len = strlen (domainname) + 1; struct binding *new_binding = (struct binding *) malloc (offsetof (struct binding, domainname) + len); if (__builtin_expect (new_binding == NULL, 0)) goto failed; memcpy (new_binding->domainname, domainname, len); if (dirnamep) { const char *dirname = *dirnamep; if (dirname == NULL) /* The default value. */ dirname = INTUSE(_nl_default_dirname); else { if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) dirname = INTUSE(_nl_default_dirname); else { char *result; #if defined _LIBC || defined HAVE_STRDUP result = strdup (dirname); if (__builtin_expect (result == NULL, 0)) goto failed_dirname; #else size_t len = strlen (dirname) + 1; result = (char *) malloc (len); if (__builtin_expect (result == NULL, 0)) goto failed_dirname; memcpy (result, dirname, len); #endif dirname = result; } } *dirnamep = dirname; new_binding->dirname = (char *) dirname; } else /* The default value. */ new_binding->dirname = (char *) INTUSE(_nl_default_dirname); new_binding->codeset_cntr = 0; if (codesetp) { const char *codeset = *codesetp; if (codeset != NULL) { char *result; #if defined _LIBC || defined HAVE_STRDUP result = strdup (codeset); if (__builtin_expect (result == NULL, 0)) goto failed_codeset; #else size_t len = strlen (codeset) + 1; result = (char *) malloc (len); if (__builtin_expect (result == NULL, 0)) goto failed_codeset; memcpy (result, codeset, len); #endif codeset = result; new_binding->codeset_cntr++; } *codesetp = codeset; new_binding->codeset = (char *) codeset; } else new_binding->codeset = NULL; /* Now enqueue it. */ if (_nl_domain_bindings == NULL || strcmp (domainname, _nl_domain_bindings->domainname) < 0) { new_binding->next = _nl_domain_bindings; _nl_domain_bindings = new_binding; } else { binding = _nl_domain_bindings; while (binding->next != NULL && strcmp (domainname, binding->next->domainname) > 0) binding = binding->next; new_binding->next = binding->next; binding->next = new_binding; } modified = 1; /* Here we deal with memory allocation failures. */ if (0) { failed_codeset: if (new_binding->dirname != INTUSE(_nl_default_dirname)) free (new_binding->dirname); failed_dirname: free (new_binding); failed: if (dirnamep) *dirnamep = NULL; if (codesetp) *codesetp = NULL; } } /* If we modified any binding, we flush the caches. */ if (modified) ++_nl_msg_cat_cntr; __libc_rwlock_unlock (_nl_state_lock); } /* Specify that the DOMAINNAME message catalog will be found in DIRNAME rather than in the system locale data base. */ char * BINDTEXTDOMAIN (domainname, dirname) const char *domainname; const char *dirname; { set_binding_values (domainname, &dirname, NULL); return (char *) dirname; } /* Specify the character encoding in which the messages from the DOMAINNAME message catalog will be returned. */ char * BIND_TEXTDOMAIN_CODESET (domainname, codeset) const char *domainname; const char *codeset; { set_binding_values (domainname, NULL, &codeset); return (char *) codeset; } #ifdef _LIBC /* Aliases for function names in GNU C Library. */ weak_alias (__bindtextdomain, bindtextdomain); weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset); #endif