lib/libintl/textdomain.c

   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(const char *, int);
  48
  49 /*
  50  * set the default domainname for dcngettext() and friends.
  51  */
  52 char *
  53 textdomain(const char *domainname)
  54 {
  55
  56         /* NULL pointer gives the current setting */
  57         if (!domainname)
  58                 return __current_domainname;
  59
  60         /* empty string sets the value back to the default */
  61         if (!*domainname) {
  62                 strlcpy(__current_domainname, DEFAULT_DOMAINNAME,
  63                     sizeof(__current_domainname));
  64         } else {
  65                 strlcpy(__current_domainname, domainname,
  66                     sizeof(__current_domainname));
  67         }
  68         return __current_domainname;
  69 }
  70
  71 char *
  72 bindtextdomain(const char *domainname, const char *dirname)
  73 {
  74         struct domainbinding *p;
  75
  76         /* NULL pointer or empty string returns NULL with no operation */
  77         if (!domainname || !*domainname)
  78                 return NULL;
  79
  80         if (dirname && (strlen(dirname) + 1 > sizeof(p->path)))
  81                 return NULL;
  82
  83 #if 0
  84         /* disallow relative path */
  85         if (dirname[0] != '/')
  86                 return NULL;
  87 #endif
  88
  89         if (strlen(domainname) + 1 > sizeof(p->domainname))
  90                 return NULL;
  91
  92         p = domainbinding_lookup(domainname, (dirname != NULL));
  93
  94         if (!dirname) {
  95                 if (p)
  96                         return (p->path);
  97                 else
  98                         return (char *)__UNCONST(_PATH_TEXTDOMAIN);
  99         }
 100
 101         strlcpy(p->path, dirname, sizeof(p->path));
 102         p->mohandle.mo.mo_magic = 0; /* invalidate current mapping */
 103
 104         return (p->path);
 105 }
 106
 107 char *
 108 bind_textdomain_codeset(const char *domainname, const char *codeset)
 109 {
 110         struct domainbinding *p;
 111
 112         p = domainbinding_lookup(domainname, (codeset != NULL));
 113         if (p == NULL)
 114                 return NULL;
 115
 116         if (codeset) {
 117                 if (p->codeset)
 118                         free(p->codeset);
 119                 p->codeset = strdup(codeset);
 120         }
 121
 122         return p->codeset;
 123 }
 124
 125 /*
 126  * lookup binding for the domainname
 127  */
 128 static struct domainbinding *
 129 domainbinding_lookup(const char *domainname, int alloc)
 130 {
 131         struct domainbinding *p;
 132
 133         for (p = __bindings; p; p = p->next)
 134                 if (strcmp(p->domainname, domainname) == 0)
 135                         break;
 136
 137         if (!p && alloc) {
 138                 p = (struct domainbinding *)malloc(sizeof(*p));
 139                 if (!p)
 140                         return NULL;
 141                 memset(p, 0, sizeof(*p));
 142                 p->next = __bindings;
 143                 strlcpy(p->domainname, domainname, sizeof(p->domainname));
 144                 __bindings = p;
 145         }
 146
 147         return p;
 148 }