LCOV - code coverage report
Current view: top level - lib - toutf8.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 12 14 85.7 %
Date: 2015-03-02 11:46:03 Functions: 4 4 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* toutf8.c --- Convert strings from system locale into UTF-8.
       2             :    Copyright (C) 2002-2015 Simon Josefsson
       3             : 
       4             :    This file is part of GNU Libidn.
       5             : 
       6             :    GNU Libidn is free software: you can redistribute it and/or
       7             :    modify it under the terms of either:
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version.
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version.
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    GNU Libidn is distributed in the hope that it will be useful,
      22             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>. */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include "config.h"
      32             : #endif
      33             : 
      34             : /* Get prototypes. */
      35             : #include "stringprep.h"
      36             : 
      37             : /* Get fprintf. */
      38             : #include <stdio.h>
      39             : 
      40             : /* Get getenv. */
      41             : #include <stdlib.h>
      42             : 
      43             : /* Get strlen. */
      44             : #include <string.h>
      45             : 
      46             : /* Get iconv_string. */
      47             : #include "striconv.h"
      48             : 
      49             : #ifdef _LIBC
      50             : # define HAVE_ICONV 1
      51             : # define HAVE_LOCALE_H 1
      52             : # define HAVE_LANGINFO_CODESET 1
      53             : #endif
      54             : 
      55             : #include <locale.h>
      56             : 
      57             : #ifdef HAVE_LANGINFO_CODESET
      58             : # include <langinfo.h>
      59             : #endif
      60             : 
      61             : #ifdef _LIBC
      62             : # define stringprep_locale_charset() nl_langinfo (CODESET)
      63             : #else
      64             : /**
      65             :  * stringprep_locale_charset:
      66             :  *
      67             :  * Find out current locale charset.  The function respect the CHARSET
      68             :  * environment variable, but typically uses nl_langinfo(CODESET) when
      69             :  * it is supported.  It fall back on "ASCII" if CHARSET isn't set and
      70             :  * nl_langinfo isn't supported or return anything.
      71             :  *
      72             :  * Note that this function return the application's locale's preferred
      73             :  * charset (or thread's locale's preffered charset, if your system
      74             :  * support thread-specific locales).  It does not return what the
      75             :  * system may be using.  Thus, if you receive data from external
      76             :  * sources you cannot in general use this function to guess what
      77             :  * charset it is encoded in.  Use stringprep_convert from the external
      78             :  * representation into the charset returned by this function, to have
      79             :  * data in the locale encoding.
      80             :  *
      81             :  * Return value: Return the character set used by the current locale.
      82             :  *   It will never return NULL, but use "ASCII" as a fallback.
      83             :  **/
      84             : const char *
      85           4 : stringprep_locale_charset (void)
      86             : {
      87           4 :   const char *charset = getenv ("CHARSET");   /* flawfinder: ignore */
      88             : 
      89           4 :   if (charset && *charset)
      90           0 :     return charset;
      91             : 
      92             : # ifdef HAVE_LANGINFO_CODESET
      93           4 :   charset = nl_langinfo (CODESET);
      94             : 
      95           4 :   if (charset && *charset)
      96           4 :     return charset;
      97             : # endif
      98             : 
      99           0 :   return "ASCII";
     100             : }
     101             : #endif
     102             : 
     103             : /**
     104             :  * stringprep_convert:
     105             :  * @str: input zero-terminated string.
     106             :  * @to_codeset: name of destination character set.
     107             :  * @from_codeset: name of origin character set, as used by @str.
     108             :  *
     109             :  * Convert the string from one character set to another using the
     110             :  * system's iconv() function.
     111             :  *
     112             :  * Return value: Returns newly allocated zero-terminated string which
     113             :  *   is @str transcoded into to_codeset.
     114             :  **/
     115             : char *
     116           3 : stringprep_convert (const char *str,
     117             :                     const char *to_codeset, const char *from_codeset)
     118             : {
     119             : #if HAVE_ICONV
     120           3 :   return str_iconv (str, from_codeset, to_codeset);
     121             : #else
     122             :   char *p;
     123             :   fprintf (stderr, "libidn: warning: libiconv not installed, cannot "
     124             :            "convert data to UTF-8\n");
     125             :   p = malloc (strlen (str) + 1);
     126             :   if (!p)
     127             :     return NULL;
     128             :   return strcpy (p, str);
     129             : #endif
     130             : }
     131             : 
     132             : /**
     133             :  * stringprep_locale_to_utf8:
     134             :  * @str: input zero terminated string.
     135             :  *
     136             :  * Convert string encoded in the locale's character set into UTF-8 by
     137             :  * using stringprep_convert().
     138             :  *
     139             :  * Return value: Returns newly allocated zero-terminated string which
     140             :  *   is @str transcoded into UTF-8.
     141             :  **/
     142             : char *
     143           2 : stringprep_locale_to_utf8 (const char *str)
     144             : {
     145           2 :   return stringprep_convert (str, "UTF-8", stringprep_locale_charset ());
     146             : }
     147             : 
     148             : /**
     149             :  * stringprep_utf8_to_locale:
     150             :  * @str: input zero terminated string.
     151             :  *
     152             :  * Convert string encoded in UTF-8 into the locale's character set by
     153             :  * using stringprep_convert().
     154             :  *
     155             :  * Return value: Returns newly allocated zero-terminated string which
     156             :  *   is @str transcoded into the locale's character set.
     157             :  **/
     158             : char *
     159           1 : stringprep_utf8_to_locale (const char *str)
     160             : {
     161           1 :   return stringprep_convert (str, stringprep_locale_charset (), "UTF-8");
     162             : }

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