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|
/*************************************************************************
*
* $RCSfile: convertgb18030.c,v $
*
* $Revision: 1.3 $
*
* last change: $Author: sb $ $Date: 2001-11-19 17:46:37 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRUNTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRUNTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc..
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef INCLUDED_RTL_TEXTENC_CONVERTGB18030_H
#include "convertgb18030.h"
#endif
#ifndef INCLUDED_RTL_TEXTENC_CONTEXT_H
#include "context.h"
#endif
#ifndef INCLUDED_RTL_TEXTENC_CONVERTER_H
#include "converter.h"
#endif
#ifndef INCLUDED_RTL_TEXTENC_TENCHELP_H
#include "tenchelp.h"
#endif
#ifndef INCLUDED_RTL_TEXTENC_UNICHARS_H
#include "unichars.h"
#endif
#ifndef _RTL_ALLOC_H_
#include "rtl/alloc.h"
#endif
#ifndef _RTL_TEXTCVT_H
#include "rtl/textcvt.h"
#endif
#ifndef _SAL_TYPES_H_
#include "sal/types.h"
#endif
typedef enum
{
IMPL_GB_18030_TO_UNICODE_STATE_0,
IMPL_GB_18030_TO_UNICODE_STATE_1,
IMPL_GB_18030_TO_UNICODE_STATE_2,
IMPL_GB_18030_TO_UNICODE_STATE_3
} ImplGb18030ToUnicodeState;
typedef struct
{
ImplGb18030ToUnicodeState m_eState;
sal_uInt32 m_nCode;
} ImplGb18030ToUnicodeContext;
void * ImplCreateGb18030ToUnicodeContext(void)
{
void * pContext
= rtl_allocateMemory(sizeof (ImplGb18030ToUnicodeContext));
((ImplGb18030ToUnicodeContext *) pContext)->m_eState
= IMPL_GB_18030_TO_UNICODE_STATE_0;
return pContext;
}
void ImplResetGb18030ToUnicodeContext(void * pContext)
{
if (pContext)
((ImplGb18030ToUnicodeContext *) pContext)->m_eState
= IMPL_GB_18030_TO_UNICODE_STATE_0;
}
sal_Size ImplConvertGb18030ToUnicode(ImplTextConverterData const * pData,
void * pContext,
sal_Char const * pSrcBuf,
sal_Size nSrcBytes,
sal_Unicode * pDestBuf,
sal_Size nDestChars,
sal_uInt32 nFlags,
sal_uInt32 * pInfo,
sal_Size * pSrcCvtBytes)
{
sal_Unicode const * pGb18030Data
= ((ImplGb18030ConverterData const *) pData)->m_pGb18030ToUnicodeData;
ImplGb180302000ToUnicodeRange const * pGb18030Ranges
= ((ImplGb18030ConverterData const *) pData)->
m_pGb18030ToUnicodeRanges;
ImplGb18030ToUnicodeState eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
sal_uInt32 nCode;
sal_uInt32 nInfo = 0;
sal_Size nConverted = 0;
sal_Unicode * pDestBufPtr = pDestBuf;
sal_Unicode * pDestBufEnd = pDestBuf + nDestChars;
if (pContext)
{
eState = ((ImplGb18030ToUnicodeContext *) pContext)->m_eState;
nCode = ((ImplGb18030ToUnicodeContext *) pContext)->m_nCode;
}
for (; nConverted < nSrcBytes; ++nConverted)
{
sal_Bool bUndefined = sal_True;
sal_uInt32 nChar = *((sal_uChar const *) pSrcBuf)++;
switch (eState)
{
case IMPL_GB_18030_TO_UNICODE_STATE_0:
if (nChar < 0x80)
if (pDestBufPtr != pDestBufEnd)
*pDestBufPtr++ = (sal_Unicode) nChar;
else
goto no_output;
else if (nChar == 0x80)
goto bad_input;
else if (nChar <= 0xFE)
{
nCode = nChar - 0x81;
eState = IMPL_GB_18030_TO_UNICODE_STATE_1;
}
else
{
bUndefined = sal_False;
goto bad_input;
}
break;
case IMPL_GB_18030_TO_UNICODE_STATE_1:
if (nChar >= 0x30 && nChar <= 0x39)
{
nCode = nCode * 10 + (nChar - 0x30);
eState = IMPL_GB_18030_TO_UNICODE_STATE_2;
}
else if (nChar >= 0x40 && nChar <= 0x7E
|| nChar >= 0x80 && nChar <= 0xFE)
{
nCode = nCode * 190 + (nChar <= 0x7E ? nChar - 0x40 :
nChar - 0x80 + 63);
if (pDestBufPtr != pDestBufEnd)
*pDestBufPtr++ = pGb18030Data[nCode];
else
goto no_output;
eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
}
else
{
bUndefined = sal_False;
goto bad_input;
}
break;
case IMPL_GB_18030_TO_UNICODE_STATE_2:
if (nChar >= 0x81 && nChar <= 0xFE)
{
nCode = nCode * 126 + (nChar - 0x81);
eState = IMPL_GB_18030_TO_UNICODE_STATE_3;
}
else
{
bUndefined = sal_False;
goto bad_input;
}
break;
case IMPL_GB_18030_TO_UNICODE_STATE_3:
if (nChar >= 0x30 && nChar <= 0x39)
{
nCode = nCode * 10 + (nChar - 0x30);
/* 90 30 81 30 to E3 32 9A 35 maps to U+10000 to U+10FFFF: */
if (nCode >= 189000 && nCode <= 1237575)
if (pDestBufEnd - pDestBufPtr >= 2)
{
nCode -= 189000 - 0x10000;
*pDestBufPtr++
= (sal_Unicode) ImplGetHighSurrogate(nCode);
*pDestBufPtr++
= (sal_Unicode) ImplGetLowSurrogate(nCode);
}
else
goto no_output;
else
{
ImplGb180302000ToUnicodeRange const * pRange
= pGb18030Ranges;
sal_uInt32 nFirstNonRange = 0;
for (;;)
{
if (pRange->m_nNonRangeDataIndex == -1)
goto bad_input;
else if (nCode < pRange->m_nFirstLinear)
{
if (pDestBufPtr != pDestBufEnd)
*pDestBufPtr++
= pGb18030Data[
pRange->m_nNonRangeDataIndex
+ (nCode - nFirstNonRange)];
else
goto no_output;
break;
}
else if (nCode < pRange->m_nPastLinear)
{
if (pDestBufPtr != pDestBufEnd)
*pDestBufPtr++
= (sal_Unicode)
(pRange->m_nFirstUnicode
+ (nCode
- pRange->
m_nFirstLinear));
else
goto no_output;
break;
}
nFirstNonRange = (pRange++)->m_nPastLinear;
}
}
eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
}
else
{
bUndefined = sal_False;
goto bad_input;
}
break;
}
continue;
bad_input:
switch (ImplHandleBadInputMbTextToUnicodeConversion(bUndefined,
nFlags,
&pDestBufPtr,
pDestBufEnd,
&nInfo))
{
case IMPL_BAD_INPUT_STOP:
eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
break;
case IMPL_BAD_INPUT_CONTINUE:
eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
continue;
case IMPL_BAD_INPUT_NO_OUTPUT:
goto no_output;
}
break;
no_output:
--pSrcBuf;
nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
break;
}
if (eState != IMPL_GB_18030_TO_UNICODE_STATE_0
&& (nInfo & (RTL_TEXTTOUNICODE_INFO_ERROR
| RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL))
== 0)
if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0)
nInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
else
switch (ImplHandleBadInputMbTextToUnicodeConversion(sal_False,
nFlags,
&pDestBufPtr,
pDestBufEnd,
&nInfo))
{
case IMPL_BAD_INPUT_STOP:
case IMPL_BAD_INPUT_CONTINUE:
eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
break;
case IMPL_BAD_INPUT_NO_OUTPUT:
nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
break;
}
if (pContext)
{
((ImplGb18030ToUnicodeContext *) pContext)->m_eState = eState;
((ImplGb18030ToUnicodeContext *) pContext)->m_nCode = nCode;
}
if (pInfo)
*pInfo = nInfo;
if (pSrcCvtBytes)
*pSrcCvtBytes = nConverted;
return pDestBufPtr - pDestBuf;
}
sal_Size ImplConvertUnicodeToGb18030(ImplTextConverterData const * pData,
void * pContext,
sal_Unicode const * pSrcBuf,
sal_Size nSrcChars,
sal_Char * pDestBuf,
sal_Size nDestBytes,
sal_uInt32 nFlags,
sal_uInt32 * pInfo,
sal_Size * pSrcCvtChars)
{
sal_uInt32 const * pGb18030Data
= ((ImplGb18030ConverterData const *) pData)->
m_pUnicodeToGb18030Data;
ImplUnicodeToGb180302000Range const * pGb18030Ranges
= ((ImplGb18030ConverterData const *) pData)->
m_pUnicodeToGb18030Ranges;
sal_Unicode nHighSurrogate = 0;
sal_uInt32 nInfo = 0;
sal_Size nConverted = 0;
sal_Char * pDestBufPtr = pDestBuf;
sal_Char * pDestBufEnd = pDestBuf + nDestBytes;
if (pContext)
nHighSurrogate
= ((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate;
for (; nConverted < nSrcChars; ++nConverted)
{
sal_Bool bUndefined = sal_True;
sal_uInt32 nChar = *pSrcBuf++;
if (nHighSurrogate == 0)
{
if (ImplIsHighSurrogate(nChar))
{
nHighSurrogate = (sal_Unicode) nChar;
continue;
}
}
else if (ImplIsLowSurrogate(nChar))
nChar = ImplCombineSurrogates(nHighSurrogate, nChar);
else
{
bUndefined = sal_False;
goto bad_input;
}
if (ImplIsLowSurrogate(nChar) || ImplIsNoncharacter(nChar))
{
bUndefined = sal_False;
goto bad_input;
}
if (nChar < 0x80)
if (pDestBufPtr != pDestBufEnd)
*pDestBufPtr++ = (sal_Char) nChar;
else
goto no_output;
else if (nChar < 0x10000)
{
ImplUnicodeToGb180302000Range const * pRange = pGb18030Ranges;
sal_Unicode nFirstNonRange = 0x80;
for (;;)
{
if (nChar < pRange->m_nFirstUnicode)
{
sal_uInt32 nCode
= pGb18030Data[pRange->m_nNonRangeDataIndex
+ (nChar - nFirstNonRange)];
if (pDestBufEnd - pDestBufPtr
>= (nCode <= 0xFFFF ? 2 : 4))
{
if (nCode > 0xFFFF)
{
*pDestBufPtr++ = (sal_Char) (nCode >> 24);
*pDestBufPtr++ = (sal_Char) (nCode >> 16 & 0xFF);
}
*pDestBufPtr++ = (sal_Char) (nCode >> 8 & 0xFF);
*pDestBufPtr++ = (sal_Char) (nCode & 0xFF);
}
else
goto no_output;
break;
}
else if (nChar <= pRange->m_nLastUnicode)
{
if (pDestBufEnd - pDestBufPtr >= 4)
{
sal_uInt32 nCode
= pRange->m_nFirstLinear
+ (nChar - pRange->m_nFirstUnicode);
*pDestBufPtr++ = (sal_Char) (nCode / 12600 + 0x81);
*pDestBufPtr++
= (sal_Char) (nCode / 1260 % 10 + 0x30);
*pDestBufPtr++ = (sal_Char) (nCode / 10 % 126 + 0x81);
*pDestBufPtr++ = (sal_Char) (nCode % 10 + 0x30);
}
else
goto no_output;
break;
}
nFirstNonRange
= (sal_Unicode) ((pRange++)->m_nLastUnicode + 1);
}
}
else
if (pDestBufEnd - pDestBufPtr >= 4)
{
sal_uInt32 nCode = nChar - 0x10000;
*pDestBufPtr++ = (sal_Char) (nCode / 12600 + 0x90);
*pDestBufPtr++ = (sal_Char) (nCode / 1260 % 10 + 0x30);
*pDestBufPtr++ = (sal_Char) (nCode / 10 % 126 + 0x81);
*pDestBufPtr++ = (sal_Char) (nCode % 10 + 0x30);
}
else
goto no_output;
nHighSurrogate = 0;
continue;
bad_input:
switch (ImplHandleBadInputUnicodeToTextConversion(bUndefined,
nChar,
nFlags,
&pDestBufPtr,
pDestBufEnd,
&nInfo,
NULL,
0,
NULL))
{
case IMPL_BAD_INPUT_STOP:
nHighSurrogate = 0;
break;
case IMPL_BAD_INPUT_CONTINUE:
nHighSurrogate = 0;
continue;
case IMPL_BAD_INPUT_NO_OUTPUT:
goto no_output;
}
break;
no_output:
--pSrcBuf;
nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
if (nHighSurrogate != 0
&& (nInfo & (RTL_UNICODETOTEXT_INFO_ERROR
| RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL))
== 0)
if ((nFlags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0)
nInfo |= RTL_UNICODETOTEXT_INFO_SRCBUFFERTOSMALL;
else
switch (ImplHandleBadInputUnicodeToTextConversion(sal_False,
0,
nFlags,
&pDestBufPtr,
pDestBufEnd,
&nInfo,
NULL,
0,
NULL))
{
case IMPL_BAD_INPUT_STOP:
case IMPL_BAD_INPUT_CONTINUE:
nHighSurrogate = 0;
break;
case IMPL_BAD_INPUT_NO_OUTPUT:
nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
if (pContext)
((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate
= nHighSurrogate;
if (pInfo)
*pInfo = nInfo;
if (pSrcCvtChars)
*pSrcCvtChars = nConverted;
return pDestBufPtr - pDestBuf;
}
|
