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textdomain.c revision 1.11 
      1 /*	$NetBSD: textdomain.c,v 1.11 2004/09/23 16:44:26 tshiozak Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2001 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __RCSID("$NetBSD: textdomain.c,v 1.11 2004/09/23 16:44:26 tshiozak Exp $");
     31 
     32 #include <sys/param.h>
     33 
     34 #include <stdio.h>
     35 #include <string.h>
     36 #include <stdlib.h>
     37 #include <libintl.h>
     38 #include "libintl_local.h"
     39 #include "pathnames.h"
     40 
     41 static struct domainbinding __default_binding = {
     42 	NULL, DEFAULT_DOMAINNAME, _PATH_TEXTDOMAIN,
     43 };
     44 struct domainbinding *__bindings = &__default_binding;
     45 char __current_domainname[PATH_MAX] = DEFAULT_DOMAINNAME;
     46 
     47 static struct domainbinding *domainbinding_lookup __P((const char *, int));
     48 
     49 /*
     50  * set the default domainname for dcngettext() and friends.
     51  */
     52 char *
     53 textdomain(domainname)
     54 	const char *domainname;
     55 {
     56 
     57 	/* NULL pointer gives the current setting */
     58 	if (!domainname)
     59 		return __current_domainname;
     60 
     61 	/* empty string sets the value back to the default */
     62 	if (!*domainname) {
     63 		strlcpy(__current_domainname, DEFAULT_DOMAINNAME,
     64 		    sizeof(__current_domainname));
     65 	} else {
     66 		strlcpy(__current_domainname, domainname,
     67 		    sizeof(__current_domainname));
     68 	}
     69 	return __current_domainname;
     70 }
     71 
     72 char *
     73 bindtextdomain(domainname, dirname)
     74 	const char *domainname;
     75 	const char *dirname;
     76 {
     77 	struct domainbinding *p;
     78 
     79 	/* NULL pointer or empty string returns NULL with no operation */
     80 	if (!domainname || !*domainname)
     81 		return NULL;
     82 
     83 	if (dirname && (strlen(dirname) + 1 > sizeof(p->path)))
     84 		return NULL;
     85 
     86 #if 0
     87 	/* disallow relative path */
     88 	if (dirname[0] != '/')
     89 		return NULL;
     90 #endif
     91 
     92 	if (strlen(domainname) + 1 > sizeof(p->domainname))
     93 		return NULL;
     94 
     95 	p = domainbinding_lookup(domainname, (dirname != NULL));
     96 
     97 	if (!dirname) {
     98 		if (p)
     99 			return (p->path);
    100 		else
    101 			return (char *)__UNCONST(_PATH_TEXTDOMAIN);
    102 	}
    103 
    104 	strlcpy(p->path, dirname, sizeof(p->path));
    105 	p->mohandle.mo.mo_magic = 0; /* invalidate current mapping */
    106 
    107 	return (p->path);
    108 }
    109 
    110 char *
    111 bind_textdomain_codeset(domainname, codeset)
    112 	const char *domainname;
    113 	const char *codeset;
    114 {
    115 	struct domainbinding *p;
    116 
    117 	p = domainbinding_lookup(domainname, (codeset != NULL));
    118 	if (p == NULL)
    119 		return NULL;
    120 
    121 	if (codeset) {
    122 		if (p->codeset)
    123 			free(p->codeset);
    124 		p->codeset = strdup(codeset);
    125 	}
    126 
    127 	return p->codeset;
    128 }
    129 
    130 /*
    131  * lookup binding for the domainname
    132  */
    133 static struct domainbinding *
    134 domainbinding_lookup(domainname, alloc)
    135 	const char *domainname;
    136 	int alloc;
    137 {
    138 	struct domainbinding *p;
    139 
    140 	for (p = __bindings; p; p = p->next)
    141 		if (strcmp(p->domainname, domainname) == 0)
    142 			break;
    143 
    144 	if (!p && alloc) {
    145 		p = (struct domainbinding *)malloc(sizeof(*p));
    146 		if (!p)
    147 			return NULL;
    148 		memset(p, 0, sizeof(*p));
    149 		p->next = __bindings;
    150 		strlcpy(p->domainname, domainname, sizeof(p->domainname));
    151 		__bindings = p;
    152 	}
    153 
    154 	return p;
    155 }
    156