lib/striconv.h

   1 /* Charset conversion.
   2    Copyright (C) 2001-2004, 2006-2007, 2009-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible and Simon Josefsson.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser 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 /* This file uses _GL_ATTRIBUTE_MALLOC, HAVE_ICONV.  */
  22 #if !_GL_CONFIG_H_INCLUDED
  23  #error "Please include config.h first."
  24 #endif
  25
  26 #include <stdlib.h>
  27 #if HAVE_ICONV
  28 #include <iconv.h>
  29 #endif
  30
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36
  37 #if HAVE_ICONV
  38
  39 /* Convert an entire string from one encoding to another, using iconv.
  40    The original string is at [SRC,...,SRC+SRCLEN-1].
  41    The conversion descriptor is passed as CD.
  42    *RESULTP and *LENGTH should initially be a scratch buffer and its size,
  43    or *RESULTP can initially be NULL.
  44    May erase the contents of the memory at *RESULTP.
  45    Return value: 0 if successful, otherwise -1 and errno set.
  46    If successful: The resulting string is stored in *RESULTP and its length
  47    in *LENGTHP.  *RESULTP is set to a freshly allocated memory block, or is
  48    unchanged if no dynamic memory allocation was necessary.  */
  49 extern int mem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
  50                          char **resultp, size_t *lengthp);
  51
  52 /* Convert an entire string from one encoding to another, using iconv.
  53    The original string is the NUL-terminated string starting at SRC.
  54    The conversion descriptor is passed as CD.  Both the "from" and the "to"
  55    encoding must use a single NUL byte at the end of the string (i.e. not
  56    UCS-2, UCS-4, UTF-16, UTF-32).
  57    Allocate a malloced memory block for the result.
  58    Return value: the freshly allocated resulting NUL-terminated string if
  59    successful, otherwise NULL and errno set.  */
  60 extern char * str_cd_iconv (const char *src, iconv_t cd)
  61   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
  62
  63 #endif
  64
  65 /* Convert an entire string from one encoding to another, using iconv.
  66    The original string is the NUL-terminated string starting at SRC.
  67    Both the "from" and the "to" encoding must use a single NUL byte at the
  68    end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
  69    Allocate a malloced memory block for the result.
  70    Return value: the freshly allocated resulting NUL-terminated string if
  71    successful, otherwise NULL and errno set.  */
  72 extern char * str_iconv (const char *src,
  73                          const char *from_codeset, const char *to_codeset)
  74   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
  75
  76
  77 #ifdef __cplusplus
  78 }
  79 #endif
  80
  81
  82 #endif /* _STRICONV_H */