493 lines
18 KiB
C
493 lines
18 KiB
C
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include "convertbig5hkscs.h"
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#include "context.h"
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#include "converter.h"
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#include "tenchelp.h"
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#include "unichars.h"
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#include "osl/diagnose.h"
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#include "rtl/alloc.h"
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#include "rtl/textcvt.h"
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#include "sal/types.h"
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typedef struct
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{
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sal_Int32 m_nRow; /* 0--255; 0 means none */
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} ImplBig5HkscsToUnicodeContext;
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void * ImplCreateBig5HkscsToUnicodeContext(void)
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{
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void * pContext
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= rtl_allocateMemory(sizeof (ImplBig5HkscsToUnicodeContext));
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((ImplBig5HkscsToUnicodeContext *) pContext)->m_nRow = 0;
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return pContext;
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}
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void ImplResetBig5HkscsToUnicodeContext(void * pContext)
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{
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if (pContext)
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((ImplBig5HkscsToUnicodeContext *) pContext)->m_nRow = 0;
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}
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sal_Size ImplConvertBig5HkscsToUnicode(ImplTextConverterData const * pData,
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void * pContext,
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sal_Char const * pSrcBuf,
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sal_Size nSrcBytes,
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sal_Unicode * pDestBuf,
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sal_Size nDestChars,
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sal_uInt32 nFlags,
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sal_uInt32 * pInfo,
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sal_Size * pSrcCvtBytes)
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{
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sal_uInt16 const * pBig5Hkscs2001Data
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pBig5Hkscs2001ToUnicodeData;
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sal_Int32 const * pBig5Hkscs2001RowOffsets
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pBig5Hkscs2001ToUnicodeRowOffsets;
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ImplDBCSToUniLeadTab const * pBig5Data
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pBig5ToUnicodeData;
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sal_Int32 nRow = 0;
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sal_uInt32 nInfo = 0;
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sal_Size nConverted = 0;
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sal_Unicode * pDestBufPtr = pDestBuf;
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sal_Unicode * pDestBufEnd = pDestBuf + nDestChars;
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if (pContext)
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nRow = ((ImplBig5HkscsToUnicodeContext *) pContext)->m_nRow;
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for (; nConverted < nSrcBytes; ++nConverted)
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{
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sal_Bool bUndefined = sal_True;
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sal_uInt32 nChar = *(sal_uChar const *) pSrcBuf++;
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if (nRow == 0)
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if (nChar < 0x80)
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++ = (sal_Unicode) nChar;
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else
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goto no_output;
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else if (nChar >= 0x81 && nChar <= 0xFE)
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nRow = nChar;
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else
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{
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bUndefined = sal_False;
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goto bad_input;
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}
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else
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if ((nChar >= 0x40 && nChar <= 0x7E)
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|| (nChar >= 0xA1 && nChar <= 0xFE))
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{
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sal_uInt32 nUnicode = 0xFFFF;
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sal_Int32 nOffset = pBig5Hkscs2001RowOffsets[nRow];
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sal_uInt32 nFirst=0;
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sal_uInt32 nLast=0;
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if (nOffset != -1)
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{
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sal_uInt32 nFirstLast = pBig5Hkscs2001Data[nOffset++];
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nFirst = nFirstLast & 0xFF;
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nLast = nFirstLast >> 8;
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if (nChar >= nFirst && nChar <= nLast)
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nUnicode
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= pBig5Hkscs2001Data[nOffset + (nChar - nFirst)];
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}
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if (nUnicode == 0xFFFF)
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{
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sal_uInt32 nFirst = pBig5Data[nRow].mnTrailStart;
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if (nChar >= nFirst
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&& nChar <= pBig5Data[nRow].mnTrailEnd)
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{
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nUnicode
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= pBig5Data[nRow].mpToUniTrailTab[nChar - nFirst];
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if (nUnicode == 0)
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nUnicode = 0xFFFF;
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OSL_VERIFY(!ImplIsHighSurrogate(nUnicode));
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}
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}
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if (nUnicode == 0xFFFF)
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{
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ImplDBCSEUDCData const * p
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pEudcData;
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sal_uInt32 nCount
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_nEudcCount;
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sal_uInt32 i;
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for (i = 0; i < nCount; ++i)
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{
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if (nRow >= p->mnLeadStart && nRow <= p->mnLeadEnd)
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{
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if (nChar < p->mnTrail1Start)
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break;
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if (nChar <= p->mnTrail1End)
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{
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nUnicode
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= p->mnUniStart
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+ (nRow - p->mnLeadStart)
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* p->mnTrailRangeCount
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+ (nChar - p->mnTrail1Start);
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break;
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}
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if (p->mnTrailCount < 2
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|| nChar < p->mnTrail2Start)
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break;
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if (nChar <= p->mnTrail2End)
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{
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nUnicode
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= p->mnUniStart
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+ (nRow - p->mnLeadStart)
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* p->mnTrailRangeCount
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+ (nChar - p->mnTrail2Start)
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+ (p->mnTrail1End - p->mnTrail1Start
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+ 1);
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break;
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}
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if (p->mnTrailCount < 3
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|| nChar < p->mnTrail3Start)
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break;
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if (nChar <= p->mnTrail3End)
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{
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nUnicode
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= p->mnUniStart
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+ (nRow - p->mnLeadStart)
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* p->mnTrailRangeCount
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+ (nChar - p->mnTrail3Start)
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+ (p->mnTrail1End - p->mnTrail1Start
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+ 1)
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+ (p->mnTrail2End - p->mnTrail2Start
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+ 1);
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break;
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}
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break;
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}
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++p;
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}
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OSL_VERIFY(!ImplIsHighSurrogate(nUnicode));
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}
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if (nUnicode == 0xFFFF)
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goto bad_input;
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if (ImplIsHighSurrogate(nUnicode))
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if (pDestBufEnd - pDestBufPtr >= 2)
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{
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nOffset += nLast - nFirst + 1;
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nFirst = pBig5Hkscs2001Data[nOffset++];
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*pDestBufPtr++ = (sal_Unicode) nUnicode;
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*pDestBufPtr++
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= (sal_Unicode) pBig5Hkscs2001Data[
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nOffset + (nChar - nFirst)];
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}
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else
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goto no_output;
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else
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++ = (sal_Unicode) nUnicode;
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else
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goto no_output;
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nRow = 0;
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}
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else
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{
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bUndefined = sal_False;
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goto bad_input;
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}
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continue;
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bad_input:
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switch (ImplHandleBadInputTextToUnicodeConversion(
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bUndefined, sal_True, 0, nFlags, &pDestBufPtr, pDestBufEnd,
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&nInfo))
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{
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case IMPL_BAD_INPUT_STOP:
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nRow = 0;
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break;
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case IMPL_BAD_INPUT_CONTINUE:
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nRow = 0;
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continue;
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case IMPL_BAD_INPUT_NO_OUTPUT:
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goto no_output;
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}
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break;
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no_output:
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--pSrcBuf;
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nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
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break;
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}
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if (nRow != 0
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&& (nInfo & (RTL_TEXTTOUNICODE_INFO_ERROR
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| RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL))
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== 0)
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{
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if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0)
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nInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
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else
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switch (ImplHandleBadInputTextToUnicodeConversion(
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sal_False, sal_True, 0, nFlags, &pDestBufPtr,
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pDestBufEnd, &nInfo))
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{
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case IMPL_BAD_INPUT_STOP:
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case IMPL_BAD_INPUT_CONTINUE:
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nRow = 0;
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break;
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case IMPL_BAD_INPUT_NO_OUTPUT:
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nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
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break;
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}
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}
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if (pContext)
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((ImplBig5HkscsToUnicodeContext *) pContext)->m_nRow = nRow;
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if (pInfo)
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*pInfo = nInfo;
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if (pSrcCvtBytes)
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*pSrcCvtBytes = nConverted;
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return pDestBufPtr - pDestBuf;
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}
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sal_Size ImplConvertUnicodeToBig5Hkscs(ImplTextConverterData const * pData,
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void * pContext,
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sal_Unicode const * pSrcBuf,
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sal_Size nSrcChars,
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sal_Char * pDestBuf,
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sal_Size nDestBytes,
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sal_uInt32 nFlags,
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sal_uInt32 * pInfo,
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sal_Size * pSrcCvtChars)
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{
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sal_uInt16 const * pBig5Hkscs2001Data
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pUnicodeToBig5Hkscs2001Data;
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sal_Int32 const * pBig5Hkscs2001PageOffsets
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pUnicodeToBig5Hkscs2001PageOffsets;
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sal_Int32 const * pBig5Hkscs2001PlaneOffsets
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pUnicodeToBig5Hkscs2001PlaneOffsets;
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ImplUniToDBCSHighTab const * pBig5Data
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pUnicodeToBig5Data;
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sal_Unicode nHighSurrogate = 0;
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sal_uInt32 nInfo = 0;
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sal_Size nConverted = 0;
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sal_Char * pDestBufPtr = pDestBuf;
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sal_Char * pDestBufEnd = pDestBuf + nDestBytes;
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if (pContext)
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nHighSurrogate
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= ((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate;
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for (; nConverted < nSrcChars; ++nConverted)
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{
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sal_Bool bUndefined = sal_True;
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sal_uInt32 nChar = *pSrcBuf++;
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if (nHighSurrogate == 0)
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{
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if (ImplIsHighSurrogate(nChar))
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{
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nHighSurrogate = (sal_Unicode) nChar;
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continue;
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}
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}
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else if (ImplIsLowSurrogate(nChar))
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nChar = ImplCombineSurrogates(nHighSurrogate, nChar);
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else
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{
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bUndefined = sal_False;
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goto bad_input;
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}
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if (ImplIsLowSurrogate(nChar) || ImplIsNoncharacter(nChar))
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{
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bUndefined = sal_False;
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goto bad_input;
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}
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if (nChar < 0x80)
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++ = (sal_Char) nChar;
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else
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goto no_output;
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else
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{
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sal_uInt32 nBytes = 0;
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sal_Int32 nOffset = pBig5Hkscs2001PlaneOffsets[nChar >> 16];
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if (nOffset != -1)
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{
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nOffset
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= pBig5Hkscs2001PageOffsets[nOffset + ((nChar & 0xFF00)
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>> 8)];
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if (nOffset != -1)
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{
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sal_uInt32 nFirstLast = pBig5Hkscs2001Data[nOffset++];
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sal_uInt32 nFirst = nFirstLast & 0xFF;
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sal_uInt32 nLast = nFirstLast >> 8;
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sal_uInt32 nIndex = nChar & 0xFF;
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if (nIndex >= nFirst && nIndex <= nLast)
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{
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nBytes
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= pBig5Hkscs2001Data[nOffset + (nIndex - nFirst)];
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}
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}
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}
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if (nBytes == 0)
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{
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sal_uInt32 nIndex1 = nChar >> 8;
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if (nIndex1 < 0x100)
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{
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sal_uInt32 nIndex2 = nChar & 0xFF;
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sal_uInt32 nFirst = pBig5Data[nIndex1].mnLowStart;
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if (nIndex2 >= nFirst
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&& nIndex2 <= pBig5Data[nIndex1].mnLowEnd)
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nBytes = pBig5Data[nIndex1].
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mpToUniTrailTab[nIndex2 - nFirst];
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}
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}
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if (nBytes == 0)
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{
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ImplDBCSEUDCData const * p
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_pEudcData;
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sal_uInt32 nCount
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= ((ImplBig5HkscsConverterData const *) pData)->
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m_nEudcCount;
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sal_uInt32 i;
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for (i = 0; i < nCount; ++i) {
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if (nChar >= p->mnUniStart && nChar <= p->mnUniEnd)
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{
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sal_uInt32 nIndex = nChar - p->mnUniStart;
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sal_uInt32 nLeadOff = nIndex / p->mnTrailRangeCount;
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sal_uInt32 nTrailOff = nIndex % p->mnTrailRangeCount;
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sal_uInt32 nSize;
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nBytes = (p->mnLeadStart + nLeadOff) << 8;
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nSize = p->mnTrail1End - p->mnTrail1Start + 1;
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if (nTrailOff < nSize)
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{
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nBytes |= p->mnTrail1Start + nTrailOff;
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break;
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}
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nTrailOff -= nSize;
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nSize = p->mnTrail2End - p->mnTrail2Start + 1;
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if (nTrailOff < nSize)
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{
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nBytes |= p->mnTrail2Start + nTrailOff;
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break;
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}
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nTrailOff -= nSize;
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nBytes |= p->mnTrail3Start + nTrailOff;
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break;
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}
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++p;
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}
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}
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if (nBytes == 0)
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goto bad_input;
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if (pDestBufEnd - pDestBufPtr >= 2)
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{
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*pDestBufPtr++ = (sal_Char) (nBytes >> 8);
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*pDestBufPtr++ = (sal_Char) (nBytes & 0xFF);
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}
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else
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goto no_output;
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}
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nHighSurrogate = 0;
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continue;
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bad_input:
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switch (ImplHandleBadInputUnicodeToTextConversion(bUndefined,
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nChar,
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nFlags,
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&pDestBufPtr,
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pDestBufEnd,
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&nInfo,
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NULL,
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0,
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NULL))
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{
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case IMPL_BAD_INPUT_STOP:
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nHighSurrogate = 0;
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break;
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case IMPL_BAD_INPUT_CONTINUE:
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nHighSurrogate = 0;
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continue;
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case IMPL_BAD_INPUT_NO_OUTPUT:
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goto no_output;
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}
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break;
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no_output:
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--pSrcBuf;
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nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
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break;
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}
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if (nHighSurrogate != 0
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&& (nInfo & (RTL_UNICODETOTEXT_INFO_ERROR
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| RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL))
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== 0)
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{
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if ((nFlags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0)
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nInfo |= RTL_UNICODETOTEXT_INFO_SRCBUFFERTOSMALL;
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else
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switch (ImplHandleBadInputUnicodeToTextConversion(sal_False,
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0,
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nFlags,
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&pDestBufPtr,
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pDestBufEnd,
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&nInfo,
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NULL,
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0,
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NULL))
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{
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case IMPL_BAD_INPUT_STOP:
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case IMPL_BAD_INPUT_CONTINUE:
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nHighSurrogate = 0;
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break;
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case IMPL_BAD_INPUT_NO_OUTPUT:
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nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
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break;
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}
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}
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if (pContext)
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((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate
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= nHighSurrogate;
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if (pInfo)
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*pInfo = nInfo;
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if (pSrcCvtChars)
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*pSrcCvtChars = nConverted;
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return pDestBufPtr - pDestBuf;
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}
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