452 lines
15 KiB
C
452 lines
15 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 "converteuctw.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 "rtl/alloc.h"
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#include "rtl/textcvt.h"
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#include "sal/types.h"
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typedef enum
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{
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IMPL_EUC_TW_TO_UNICODE_STATE_0,
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IMPL_EUC_TW_TO_UNICODE_STATE_1,
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IMPL_EUC_TW_TO_UNICODE_STATE_2_1,
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IMPL_EUC_TW_TO_UNICODE_STATE_2_2,
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IMPL_EUC_TW_TO_UNICODE_STATE_2_3
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} ImplEucTwToUnicodeState;
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typedef struct
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{
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ImplEucTwToUnicodeState m_eState;
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sal_Int32 m_nPlane; /* 0--15 */
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sal_Int32 m_nRow; /* 0--93 */
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} ImplEucTwToUnicodeContext;
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void * ImplCreateEucTwToUnicodeContext(void)
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{
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void * pContext = rtl_allocateMemory(sizeof (ImplEucTwToUnicodeContext));
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((ImplEucTwToUnicodeContext *) pContext)->m_eState
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= IMPL_EUC_TW_TO_UNICODE_STATE_0;
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return pContext;
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}
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void ImplResetEucTwToUnicodeContext(void * pContext)
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{
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if (pContext)
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((ImplEucTwToUnicodeContext *) pContext)->m_eState
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= IMPL_EUC_TW_TO_UNICODE_STATE_0;
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}
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sal_Size ImplConvertEucTwToUnicode(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 * pCns116431992Data
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= ((ImplEucTwConverterData const *) pData)->
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m_pCns116431992ToUnicodeData;
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sal_Int32 const * pCns116431992RowOffsets
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= ((ImplEucTwConverterData const *) pData)->
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m_pCns116431992ToUnicodeRowOffsets;
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sal_Int32 const * pCns116431992PlaneOffsets
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= ((ImplEucTwConverterData const *) pData)->
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m_pCns116431992ToUnicodePlaneOffsets;
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ImplEucTwToUnicodeState eState = IMPL_EUC_TW_TO_UNICODE_STATE_0;
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sal_Int32 nPlane = 0;
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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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{
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eState = ((ImplEucTwToUnicodeContext *) pContext)->m_eState;
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nPlane = ((ImplEucTwToUnicodeContext *) pContext)->m_nPlane;
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nRow = ((ImplEucTwToUnicodeContext *) pContext)->m_nRow;
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}
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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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switch (eState)
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{
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case IMPL_EUC_TW_TO_UNICODE_STATE_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 >= 0xA1 && nChar <= 0xFE)
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{
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nRow = nChar - 0xA1;
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eState = IMPL_EUC_TW_TO_UNICODE_STATE_1;
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}
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else if (nChar == 0x8E)
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eState = IMPL_EUC_TW_TO_UNICODE_STATE_2_1;
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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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break;
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case IMPL_EUC_TW_TO_UNICODE_STATE_1:
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if (nChar >= 0xA1 && nChar <= 0xFE)
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{
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nPlane = 0;
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goto transform;
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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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break;
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case IMPL_EUC_TW_TO_UNICODE_STATE_2_1:
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if (nChar >= 0xA1 && nChar <= 0xB0)
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{
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nPlane = nChar - 0xA1;
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++eState;
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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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break;
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case IMPL_EUC_TW_TO_UNICODE_STATE_2_2:
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if (nChar >= 0xA1 && nChar <= 0xFE)
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{
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nRow = nChar - 0xA1;
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++eState;
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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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break;
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case IMPL_EUC_TW_TO_UNICODE_STATE_2_3:
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if (nChar >= 0xA1 && nChar <= 0xFE)
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goto transform;
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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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break;
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}
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continue;
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transform:
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{
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sal_Int32 nPlaneOffset = pCns116431992PlaneOffsets[nPlane];
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if (nPlaneOffset == -1)
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goto bad_input;
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else
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{
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sal_Int32 nOffset
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= pCns116431992RowOffsets[nPlaneOffset + nRow];
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if (nOffset == -1)
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goto bad_input;
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else
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{
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sal_uInt32 nFirstLast = pCns116431992Data[nOffset++];
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sal_uInt32 nFirst = nFirstLast & 0xFF;
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sal_uInt32 nLast = nFirstLast >> 8;
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nChar -= 0xA0;
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if (nChar >= nFirst && nChar <= nLast)
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{
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sal_uInt32 nUnicode
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= pCns116431992Data[nOffset + (nChar - nFirst)];
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if (nUnicode == 0xFFFF)
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goto bad_input;
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else 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 = pCns116431992Data[nOffset++];
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*pDestBufPtr++ = (sal_Unicode) nUnicode;
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*pDestBufPtr++
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= (sal_Unicode)
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pCns116431992Data[
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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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}
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else
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goto bad_input;
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eState = IMPL_EUC_TW_TO_UNICODE_STATE_0;
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}
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}
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continue;
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}
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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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eState = IMPL_EUC_TW_TO_UNICODE_STATE_0;
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break;
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case IMPL_BAD_INPUT_CONTINUE:
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eState = IMPL_EUC_TW_TO_UNICODE_STATE_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 (eState != IMPL_EUC_TW_TO_UNICODE_STATE_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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eState = IMPL_EUC_TW_TO_UNICODE_STATE_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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{
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((ImplEucTwToUnicodeContext *) pContext)->m_eState = eState;
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((ImplEucTwToUnicodeContext *) pContext)->m_nPlane = nPlane;
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((ImplEucTwToUnicodeContext *) pContext)->m_nRow = nRow;
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}
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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 ImplConvertUnicodeToEucTw(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_uInt8 const * pCns116431992Data
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= ((ImplEucTwConverterData const *) pData)->
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m_pUnicodeToCns116431992Data;
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sal_Int32 const * pCns116431992PageOffsets
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= ((ImplEucTwConverterData const *) pData)->
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m_pUnicodeToCns116431992PageOffsets;
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sal_Int32 const * pCns116431992PlaneOffsets
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= ((ImplEucTwConverterData const *) pData)->
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m_pUnicodeToCns116431992PlaneOffsets;
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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_Int32 nOffset = pCns116431992PlaneOffsets[nChar >> 16];
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sal_uInt32 nFirst;
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sal_uInt32 nLast;
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sal_uInt32 nPlane;
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if (nOffset == -1)
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goto bad_input;
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nOffset
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= pCns116431992PageOffsets[nOffset + ((nChar & 0xFF00) >> 8)];
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if (nOffset == -1)
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goto bad_input;
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nFirst = pCns116431992Data[nOffset++];
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nLast = pCns116431992Data[nOffset++];
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nChar &= 0xFF;
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if (nChar < nFirst || nChar > nLast)
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goto bad_input;
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nOffset += 3 * (nChar - nFirst);
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nPlane = pCns116431992Data[nOffset++];
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if (nPlane == 0)
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goto bad_input;
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if (pDestBufEnd - pDestBufPtr < (nPlane == 1 ? 2 : 4))
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goto no_output;
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if (nPlane != 1)
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{
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*pDestBufPtr++ = (sal_Char) (unsigned char) 0x8E;
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*pDestBufPtr++ = (sal_Char) (0xA0 + nPlane);
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}
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*pDestBufPtr++ = (sal_Char) (0xA0 + pCns116431992Data[nOffset++]);
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*pDestBufPtr++ = (sal_Char) (0xA0 + pCns116431992Data[nOffset]);
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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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