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// -*- C++ -*-
//=============================================================================
/**
* @file Transcode.h
*
* This file declares functions to convert char string among different
* unicode encoding (utf8, utf16, utf32)
*
* $Id$
*
* @author Nanbor Wang <nanbor@cs.wustl.edu>
*/
//=============================================================================
#ifndef _ACEXML_TRANSCODE_H_
#define _ACEXML_TRANSCODE_H_
#include "common/XML_Types.h"
/**
* @class ACEXML_Transcoder Transcode.h "common/Transcode.h"
*
* @brief ACEXML_Transcoder
*
* Wrapper class for performing transcoding among different UNICODE
* encoding.
*/
class ACEXML_Export ACEXML_Transcoder
{
public:
enum
{
SUCCESS = 0,
DESTINATION_TOO_SHORT = -1,
END_OF_SOURCE = -2,
INVALID_ARGS = -3,
IS_SURROGATE = -4,
NON_UNICODE = -5
};
// The following functions translate a unicode characters
// into different encoding. Return number of characters put into
// destination or consumed from src if success without
// error, otherwise, return corresponding error code.
static int utf162utf8 (ACEXML_UTF16 src,
ACEXML_UTF8 *dst,
size_t len);
static int ucs42utf8 (ACEXML_UCS4 src,
ACEXML_UTF8 *dst,
size_t len);
static int ucs42utf16 (ACEXML_UCS4 src,
ACEXML_UTF16 *dst,
size_t len);
static int surrogate2utf8 (ACEXML_UTF16 high,
ACEXML_UTF16 low,
ACEXML_UTF8 *dst,
size_t len);
static int surrogate2ucs4 (ACEXML_UTF16 high,
ACEXML_UTF16 low,
ACEXML_UCS4 &dst);
static int utf82ucs4 (const ACEXML_UTF8 *src,
size_t len,
ACEXML_UCS4 &dst);
static int utf162ucs4 (const ACEXML_UTF16 *src,
size_t len,
ACEXML_UCS4 &dst);
// static int utf82utf16 (const ACEXML_UTF8 *src,
// size_t len,
// ACEXML_UTF16 &dst);
// This function does not handle surrogates.
// The following functions are non-inlined:
static int utf8s2utf16s (const ACEXML_UTF8 *src,
ACEXML_UTF16 *dst,
size_t len);
static int utf16s2utf8s (const ACEXML_UTF16 *src,
ACEXML_UTF8 *dst,
size_t len);
};
#if defined (__ACEXML_INLINE__)
# include "common/Transcode.i"
#endif /* __ACEXML_INLINE__ */
#endif /* _ACEXML_TRANSCODE_H_ */
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