lib/striconv.h

   1 /* Charset conversion.
   2    Copyright (C) 2001-2004, 2006-2007, 2009-2019 Free Software Foundation, Inc.
   3    Written by Bruno Haible and Simon Josefsson.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _STRICONV_H
  19 #define _STRICONV_H
  20
  21 #include <stddef.h>
  22 #if HAVE_ICONV
  23 #include <iconv.h>
  24 #endif
  25
  26
  27 #ifdef __cplusplus
  28 extern "C" {
  29 #endif
  30
  31
  32 #if HAVE_ICONV
  33
  34 /* Convert an entire string from one encoding to another, using iconv.
  35    The original string is at [SRC,...,SRC+SRCLEN-1].
  36    The conversion descriptor is passed as CD.
  37    *RESULTP and *LENGTH should initially be a scratch buffer and its size,
  38    or *RESULTP can initially be NULL.
  39    May erase the contents of the memory at *RESULTP.
  40    Return value: 0 if successful, otherwise -1 and errno set.
  41    If successful: The resulting string is stored in *RESULTP and its length
  42    in *LENGTHP.  *RESULTP is set to a freshly allocated memory block, or is
  43    unchanged if no dynamic memory allocation was necessary.  */
  44 extern int mem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
  45                          char **resultp, size_t *lengthp);
  46
  47 /* Convert an entire string from one encoding to another, using iconv.
  48    The original string is the NUL-terminated string starting at SRC.
  49    The conversion descriptor is passed as CD.  Both the "from" and the "to"
  50    encoding must use a single NUL byte at the end of the string (i.e. not
  51    UCS-2, UCS-4, UTF-16, UTF-32).
  52    Allocate a malloced memory block for the result.
  53    Return value: the freshly allocated resulting NUL-terminated string if
  54    successful, otherwise NULL and errno set.  */
  55 extern char * str_cd_iconv (const char *src, iconv_t cd);
  56
  57 #endif
  58
  59 /* Convert an entire string from one encoding to another, using iconv.
  60    The original string is the NUL-terminated string starting at SRC.
  61    Both the "from" and the "to" encoding must use a single NUL byte at the
  62    end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
  63    Allocate a malloced memory block for the result.
  64    Return value: the freshly allocated resulting NUL-terminated string if
  65    successful, otherwise NULL and errno set.  */
  66 extern char * str_iconv (const char *src,
  67                          const char *from_codeset, const char *to_codeset);
  68
  69
  70 #ifdef __cplusplus
  71 }
  72 #endif
  73
  74
  75 #endif /* _STRICONV_H */