LCOV - code coverage report
Current view: top level - lib - toutf8.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 13 14 92.9 %
Date: 2013-07-10 Functions: 4 4 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 3 8 37.5 %

           Branch data     Line data    Source code
       1                 :            : /* toutf8.c --- Convert strings from system locale into UTF-8.
       2                 :            :    Copyright (C) 2002-2013 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                 :          4 :   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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