lib/xstriconv.h

   1 /* Charset conversion with out-of-memory checking.
   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 3 of the License, or
   8    (at your option) 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 _XSTRICONV_H
  19 #define _XSTRICONV_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    Upon memory allocation failure, report the error and exit.
  41    Return value: 0 if successful, otherwise -1 and errno set.
  42    If successful: The resulting string is stored in *RESULTP and its length
  43    in *LENGTHP.  *RESULTP is set to a freshly allocated memory block, or is
  44    unchanged if no dynamic memory allocation was necessary.  */
  45 extern int xmem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
  46                           char **resultp, size_t *lengthp);
  47
  48 /* Convert an entire string from one encoding to another, using iconv.
  49    The original string is the NUL-terminated string starting at SRC.
  50    The conversion descriptor is passed as CD.  Both the "from" and the "to"
  51    encoding must use a single NUL byte at the end of the string (i.e. not
  52    UCS-2, UCS-4, UTF-16, UTF-32).
  53    Allocate a malloced memory block for the result.
  54    Upon memory allocation failure, report the error and exit.
  55    Return value: the freshly allocated resulting NUL-terminated string if
  56    successful, otherwise NULL and errno set.  */
  57 extern char * xstr_cd_iconv (const char *src, iconv_t cd);
  58
  59 #endif
  60
  61 /* Convert an entire string from one encoding to another, using iconv.
  62    The original string is the NUL-terminated string starting at SRC.
  63    Both the "from" and the "to" encoding must use a single NUL byte at the
  64    end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
  65    Allocate a malloced memory block for the result.
  66    Upon memory allocation failure, report the error and exit.
  67    Return value: the freshly allocated resulting NUL-terminated string if
  68    successful, otherwise NULL and errno set.  */
  69 extern char * xstr_iconv (const char *src,
  70                           const char *from_codeset, const char *to_codeset);
  71
  72
  73 #ifdef __cplusplus
  74 }
  75 #endif
  76
  77
  78 #endif /* _XSTRICONV_H */