haiku/headers/libs/iconv/iconv.h

/* Copyright (C) 1999-2003, 2005-2006 Free Software Foundation, Inc.
   This file is part of the GNU LIBICONV Library.

   The GNU LIBICONV Library is free software; you can redistribute it
   and/or modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   The GNU LIBICONV Library is distributed in the hope that it will be
   useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU LIBICONV Library; see the file COPYING.LIB.
   If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
   Fifth Floor, Boston, MA 02110-1301, USA.  */

/* When installed, this file is called "iconv.h". */

#ifndef _LIBICONV_H
#define _LIBICONV_H

#define _LIBICONV_VERSION 0x010B    /* version number: (major<<8) + minor */
extern int _libiconv_version; 		/* Likewise */

/* Define iconv_t ourselves. */
#undef iconv_t
#define iconv_t libiconv_t
typedef void* iconv_t;

/* Get size_t declaration.
   Get wchar_t declaration if it exists. */
#include <stddef.h>

/* Get errno declaration and values. */
#include <errno.h>
/* Some systems, like SunOS 4, don't have EILSEQ. Some systems, like BSD/OS,
   have EILSEQ in a different header.  On these systems, define EILSEQ
   ourselves. */
#ifndef EILSEQ
#define EILSEQ 
#endif


#ifdef __cplusplus
extern "C" {
#endif


/* Allocates descriptor for code conversion from encoding `fromcode' to
   encoding `tocode'. */
#ifndef LIBICONV_PLUG
#define iconv_open libiconv_open
#endif
extern iconv_t iconv_open(const char* tocode, const char* fromcode);

/* Converts, using conversion descriptor `cd', at most `*inbytesleft' bytes
   starting at `*inbuf', writing at most `*outbytesleft' bytes starting at
   `*outbuf'.
   Decrements `*inbytesleft' and increments `*inbuf' by the same amount.
   Decrements `*outbytesleft' and increments `*outbuf' by the same amount. */
#ifndef LIBICONV_PLUG
#define iconv libiconv
#endif
extern size_t iconv(iconv_t cd,  char* * inbuf, size_t *inbytesleft, 
					char* * outbuf, size_t *outbytesleft);

/* Frees resources allocated for conversion descriptor `cd'. */
#ifndef LIBICONV_PLUG
#define iconv_close libiconv_close
#endif
extern int iconv_close(iconv_t cd);


#ifndef LIBICONV_PLUG

/* Nonstandard extensions. */

/* Control of attributes. */
#define iconvctl libiconvctl
extern int iconvctl(iconv_t cd, int request, void* argument);

/* Hook performed after every successful conversion of a Unicode character. */
typedef void (*iconv_unicode_char_hook) (unsigned int uc, void* data);
/* Hook performed after every successful conversion of a wide character. */
typedef void (*iconv_wide_char_hook) (wchar_t wc, void* data);
/* Set of hooks. */
struct iconv_hooks {
  iconv_unicode_char_hook uc_hook;
  iconv_wide_char_hook wc_hook;
  void* data;
};

/* Fallback function.  Invoked when a small number of bytes could not be
   converted to a Unicode character.  This function should process all
   bytes from inbuf and may produce replacement Unicode characters by calling
   the write_replacement callback repeatedly.  */
typedef void (*iconv_unicode_mb_to_uc_fallback)
             (const char* inbuf, size_t inbufsize,
              void (*write_replacement) (const unsigned int *buf, size_t buflen,
                                         void* callback_arg),
              void* callback_arg,
              void* data);
/* Fallback function.  Invoked when a Unicode character could not be converted
   to the target encoding.  This function should process the character and
   may produce replacement bytes (in the target encoding) by calling the
   write_replacement callback repeatedly.  */
typedef void (*iconv_unicode_uc_to_mb_fallback)
             (unsigned int code,
              void (*write_replacement) (const char *buf, size_t buflen,
                                         void* callback_arg),
              void* callback_arg,
              void* data);
#if HAVE_WCHAR_T
/* Fallback function.  Invoked when a number of bytes could not be converted to
   a wide character.  This function should process all bytes from inbuf and may
   produce replacement wide characters by calling the write_replacement
   callback repeatedly.  */
typedef void (*iconv_wchar_mb_to_wc_fallback)
             (const char* inbuf, size_t inbufsize,
              void (*write_replacement) (const wchar_t *buf, size_t buflen,
                                         void* callback_arg),
              void* callback_arg,
              void* data);
/* Fallback function.  Invoked when a wide character could not be converted to
   the target encoding.  This function should process the character and may
   produce replacement bytes (in the target encoding) by calling the
   write_replacement callback repeatedly.  */
typedef void (*iconv_wchar_wc_to_mb_fallback)
             (wchar_t code,
              void (*write_replacement) (const char *buf, size_t buflen,
                                         void* callback_arg),
              void* callback_arg,
              void* data);
#else
/* If the wchar_t type does not exist, these two fallback functions are never
   invoked.  Their argument list therefore does not matter.  */
typedef void (*iconv_wchar_mb_to_wc_fallback) ();
typedef void (*iconv_wchar_wc_to_mb_fallback) ();
#endif
/* Set of fallbacks. */
struct iconv_fallbacks {
  iconv_unicode_mb_to_uc_fallback mb_to_uc_fallback;
  iconv_unicode_uc_to_mb_fallback uc_to_mb_fallback;
  iconv_wchar_mb_to_wc_fallback mb_to_wc_fallback;
  iconv_wchar_wc_to_mb_fallback wc_to_mb_fallback;
  void* data;
};

/* Requests for iconvctl. */
#define ICONV_TRIVIALP            0  /* int *argument */
#define ICONV_GET_TRANSLITERATE   1  /* int *argument */
#define ICONV_SET_TRANSLITERATE   2  /* const int *argument */
#define ICONV_GET_DISCARD_ILSEQ   3  /* int *argument */
#define ICONV_SET_DISCARD_ILSEQ   4  /* const int *argument */
#define ICONV_SET_HOOKS           5  /* const struct iconv_hooks *argument */
#define ICONV_SET_FALLBACKS       6  /* const struct iconv_fallbacks *argument */

/* Listing of locale independent encodings. */
#define iconvlist libiconvlist
extern void iconvlist(int (*do_one)(unsigned int namescount,
                                    const char * const * names,
                                    void* data),
                      void* data);

/* Canonicalize an encoding name.
   The result is either a canonical encoding name, or name itself. */
extern const char * iconv_canonicalize(const char * name);

#endif


#ifdef __cplusplus
}
#endif


#endif /* _LIBICONV_H */