lib/libintl/textdomain.c

   1 /*      $NetBSD: textdomain.c,v 1.14 2015/05/29 12:26:28 christos 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 1.14 2015/05/29 12:26:28 christos 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         .path = { _PATH_TEXTDOMAIN },
  43         .domainname = { DEFAULT_DOMAINNAME },
  44 };
  45 struct domainbinding *__bindings = &__default_binding;
  46 char __current_domainname[PATH_MAX] = DEFAULT_DOMAINNAME;
  47
  48 static struct domainbinding *domainbinding_lookup(const char *, int);
  49
  50 /*
  51  * set the default domainname for dcngettext() and friends.
  52  */
  53 char *
  54 textdomain(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(const char *domainname, const char *dirname)
  74 {
  75         struct domainbinding *p;
  76
  77         /* NULL pointer or empty string returns NULL with no operation */
  78         if (!domainname || !*domainname)
  79                 return NULL;
  80
  81         if (dirname && (strlen(dirname) + 1 > sizeof(p->path)))
  82                 return NULL;
  83
  84 #if 0
  85         /* disallow relative path */
  86         if (dirname[0] != '/')
  87                 return NULL;
  88 #endif
  89
  90         if (strlen(domainname) + 1 > sizeof(p->domainname))
  91                 return NULL;
  92
  93         p = domainbinding_lookup(domainname, (dirname != NULL));
  94
  95         if (!dirname) {
  96                 if (p)
  97                         return (p->path);
  98                 else
  99                         return (char *)__UNCONST(_PATH_TEXTDOMAIN);
 100         }
 101
 102         strlcpy(p->path, dirname, sizeof(p->path));
 103         p->mohandle.mo.mo_magic = 0; /* invalidate current mapping */
 104
 105         return (p->path);
 106 }
 107
 108 char *
 109 bind_textdomain_codeset(const char *domainname, const char *codeset)
 110 {
 111         struct domainbinding *p;
 112
 113         p = domainbinding_lookup(domainname, (codeset != NULL));
 114         if (p == NULL)
 115                 return NULL;
 116
 117         if (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 }