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/*
* Copyright (c) 2003-2004, Artem B. Bityuckiy
* Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef __ICONV_CONVERSION_H__
#define __ICONV_CONVERSION_H__
#include <_ansi.h>
#include <reent.h>
#include <sys/types.h>
#include <wchar.h>
/* Bits for 'flags' parameter of 'convert' call */
#define ICONV_DONT_SAVE_BIT 1
#define ICONV_FAIL_BIT 2
/*
* iconv_conversion_handlers_t - keeps iconv conversion handlers.
*
* Keeps 6 interface function handlers:
* open(), close(), convert(), get_mb_cur_max(), get_state(), set_state(),
* get_mb_cur_max() and is_stateful(). Last 5 interface functions are needed to
* support locale subsystem.
*
* ============================================================================
*/
typedef struct
{
/*
* open - open and initialize conversion.
*
* PARAMETERS:
* struct _reent *rptr - reent structure of current thread/process;
* const char *to - output encoding's normalized name;
* const char *from - input encoding's normalized name.
*
* DESCRIPTION:
* This function is called from iconv_open() to open conversion. Returns
* a pointer to conversion-specific data.
*
* RETURN:
* Pointer to conversion-specific data if success. In case of error
* returns NULL and sets current thread's/process's errno.
*/
void *_EXFNPTR(open, (struct _reent *rptr,
const char *to,
const char *from));
/*
* close - close conversion.
*
* PARAMETRS:
* struct _reent *rptr - reent structure of current thread/process;
* void *data - conversion-specific data.
*
* DESCRIPTION:
* This function is called from iconv_close() to close conversion.
*
* RETURN:
* When successful, returns (size_t)0. In case of error, sets current
* thread's/process's errno and returns (size_t)-1 (same as iconv_open()).
*/
size_t _EXFNPTR(close, (struct _reent *rptr,
void *data));
/* convert - perform encoding conversion.
*
* PARAMETERS:
* struct _reent *rptr - reent structure of current thread/process.
* void *data - conversion-specific data;
* const unsigned char **inbuf - input data buffer;
* size_t *inbytesleft - input buffer's length;
* unsigned char **outbuf - output data buffer;
* size_t *outbytesleft - output buffer free space;
* int flags - conversion options.
*
* DESCRIPTION:
* This function is called from iconv() to perform conversion and, if 'flags'
* is 0, behaves similarly to iconv(). 'inbuf', 'inbytesleft', 'outbuf' and
* 'outbytesleft' are same as in case of iconv() function.
*
* When flags & 1 isn't 0, 'outbuf' value is ignored and result isn't saved.
* Another conversion aspects aren't changed.
*
* When flags & 2 isn't 0, function changes it's behavior in situations,
* when there is no character in "to" encoding that corresponds to valid
* character from "from" encoding. iconv() specification stands to perform
* implimentation-spacific default conversion. If flag & 2 isn't 0,
* function generates error.
*
* RETURN:
* Returns the number of characters converted in a non-reversible way.
* Reversible conversions are not counted. In case of error, sets current
* thread's/process's errno and returns (size_t)-1 (same as iconv()).
*/
size_t _EXFNPTR(convert, (struct _reent *rptr,
void *data,
const unsigned char **inbuf,
size_t *inbytesleft,
unsigned char **outbuf,
size_t *outbytesleft,
int flags));
/*
* get_state - get current shift state.
*
* PARAMETERS:
* void *data - conversion-specific data;
* mbstate_t *state - mbstate_t object where shift state will be written;
* int direction - 0-"from", 1-"to".
*
* DESCRIPTION:
* Returns encoding's current shift sequence.
* If 'direction' is 0, "from" encoding is tested, else
* "to" encoding is tested.
*/
void _EXFNPTR(get_state, (void *data,
mbstate_t *state,
int direction));
/*
* set_state - set shift state.
*
* PARAMETERS:
* void *data - conversion-specific data;
* mbstate_t *state - mbstate_t object to which shift state will be set.
* int direction - 0-"from", 1-"to".
*
* DESCRIPTION:
* Sets encoding's current shift state to 'state'. if 'state'
* object is zero-object - reset current shift state.
* If 'direction' is 0, "from" encoding is set, else
* "to" encoding is set.
* Returns 0 if '*state' object has right format, -1 else.
*/
int _EXFNPTR(set_state, (void *data,
mbstate_t *state,
int direction));
/*
* get_mb_cur_max - get maximum character length in bytes.
*
* PARAMETERS:
* void *data - conversion-specific data;
* int direction - 0-"from", 1-"to".
*
* DESCRIPTION:
* Returns encoding's maximum character length.
* If 'direction' is 0, "from" encoding is tested, else
* "to" encoding is tested.
*/
int _EXFNPTR(get_mb_cur_max, (void *data,
int direction));
/*
* is_stateful - is encoding stateful or stateless.
*
* PARAMETERS:
* void *data - conversion-specific data;
* int direction - 0-"from", 1-"to".
*
* DESCRIPTION:
* Returns 0 if encoding is stateless and 1 if stateful.
* If 'direction' is 0, "from" encoding is tested, else
* "to" encoding is tested.
*/
int _EXFNPTR(is_stateful, (void *data,
int direction));
} iconv_conversion_handlers_t;
/*
* iconv_conversion_t - iconv conversion definition structure.
*
* ============================================================================
*/
typedef struct
{
/* Iconv conversion handlers. */
const iconv_conversion_handlers_t *handlers;
/*
* Conversion-specific data (e.g., points to iconv_ucs_conversion_t
* object if UCS-based conversion is used).
*/
void *data;
} iconv_conversion_t;
/* UCS-based conversion handlers */
extern const iconv_conversion_handlers_t
_iconv_ucs_conversion_handlers;
/* Null conversion handlers */
extern const iconv_conversion_handlers_t
_iconv_null_conversion_handlers;
#endif /* !__ICONV_CONVERSION_H__ */
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