444 lines
15 KiB
C++
444 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "sal/config.h"
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#include "rtl/textcvt.h"
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#include "sal/types.h"
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#include "context.hxx"
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#include "converter.hxx"
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#include "converteuctw.hxx"
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#include "tenchelp.hxx"
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#include "unichars.hxx"
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namespace {
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enum ImplEucTwToUnicodeState
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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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};
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struct ImplEucTwToUnicodeContext
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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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};
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}
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void * ImplCreateEucTwToUnicodeContext()
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{
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ImplEucTwToUnicodeContext * pContext = new ImplEucTwToUnicodeContext;
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pContext->m_eState = 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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static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState
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= IMPL_EUC_TW_TO_UNICODE_STATE_0;
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}
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void ImplDestroyEucTwToUnicodeContext(void * pContext)
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{
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delete static_cast< ImplEucTwToUnicodeContext * >(pContext);
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}
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sal_Size ImplConvertEucTwToUnicode(void const * pData,
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void * pContext,
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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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= static_cast< ImplEucTwConverterData const * >(pData)->
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m_pCns116431992ToUnicodeData;
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sal_Int32 const * pCns116431992RowOffsets
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= static_cast< ImplEucTwConverterData const * >(pData)->
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m_pCns116431992ToUnicodeRowOffsets;
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sal_Int32 const * pCns116431992PlaneOffsets
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= static_cast< 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 = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState;
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nPlane = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nPlane;
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nRow = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nRow;
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}
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for (; nConverted < nSrcBytes; ++nConverted)
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{
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bool bUndefined = true;
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sal_uInt32 nChar = *reinterpret_cast<unsigned char 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 = 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 = 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 = IMPL_EUC_TW_TO_UNICODE_STATE_2_2;
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}
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else
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{
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bUndefined = 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 = IMPL_EUC_TW_TO_UNICODE_STATE_2_3;
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}
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else
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{
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bUndefined = 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 = 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 (sal::detail::textenc::handleBadInputTextToUnicodeConversion(
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bUndefined, true, 0, nFlags, &pDestBufPtr, pDestBufEnd,
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&nInfo))
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{
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case sal::detail::textenc::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 sal::detail::textenc::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 sal::detail::textenc::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 (sal::detail::textenc::handleBadInputTextToUnicodeConversion(
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false, true, 0, nFlags, &pDestBufPtr, pDestBufEnd,
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&nInfo))
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{
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case sal::detail::textenc::BAD_INPUT_STOP:
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case sal::detail::textenc::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 sal::detail::textenc::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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static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState = eState;
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static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nPlane = nPlane;
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static_cast< 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(void 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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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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= static_cast< ImplEucTwConverterData const * >(pData)->
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m_pUnicodeToCns116431992Data;
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sal_Int32 const * pCns116431992PageOffsets
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= static_cast< ImplEucTwConverterData const * >(pData)->
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m_pUnicodeToCns116431992PageOffsets;
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sal_Int32 const * pCns116431992PlaneOffsets
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= static_cast< 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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char * pDestBufPtr = pDestBuf;
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char * pDestBufEnd = pDestBuf + nDestBytes;
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if (pContext)
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nHighSurrogate
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= static_cast<ImplUnicodeToTextContext *>(pContext)->m_nHighSurrogate;
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for (; nConverted < nSrcChars; ++nConverted)
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{
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bool bUndefined = 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 = 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 = 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++ = static_cast< 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++ = static_cast< char >(static_cast< unsigned char >(0x8E));
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*pDestBufPtr++ = static_cast< char >(0xA0 + nPlane);
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}
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*pDestBufPtr++ = static_cast< char >(0xA0 + pCns116431992Data[nOffset++]);
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*pDestBufPtr++ = static_cast< 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 (sal::detail::textenc::handleBadInputUnicodeToTextConversion(
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bUndefined, nChar, nFlags, &pDestBufPtr, pDestBufEnd,
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&nInfo, nullptr, 0, nullptr))
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{
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case sal::detail::textenc::BAD_INPUT_STOP:
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nHighSurrogate = 0;
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break;
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case sal::detail::textenc::BAD_INPUT_CONTINUE:
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nHighSurrogate = 0;
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continue;
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case sal::detail::textenc::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 (sal::detail::textenc::handleBadInputUnicodeToTextConversion(
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false, 0, nFlags, &pDestBufPtr, pDestBufEnd, &nInfo,
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nullptr, 0, nullptr))
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{
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case sal::detail::textenc::BAD_INPUT_STOP:
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case sal::detail::textenc::BAD_INPUT_CONTINUE:
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nHighSurrogate = 0;
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break;
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case sal::detail::textenc::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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static_cast<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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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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