diff options
Diffstat (limited to '')
| -rw-r--r-- | sal/textenc/convertbig5hkscs.cxx | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/sal/textenc/convertbig5hkscs.cxx b/sal/textenc/convertbig5hkscs.cxx new file mode 100644 index 000000000..bf3a2e2cf --- /dev/null +++ b/sal/textenc/convertbig5hkscs.cxx @@ -0,0 +1,501 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <sal/config.h> + +#include <cassert> + +#include <rtl/character.hxx> +#include <rtl/textcvt.h> +#include <sal/types.h> + +#include "context.hxx" +#include "convertbig5hkscs.hxx" +#include "converter.hxx" +#include "tenchelp.hxx" +#include "unichars.hxx" + +namespace { + +struct ImplBig5HkscsToUnicodeContext +{ + sal_Int32 m_nRow; // 0--255; 0 means none +}; + +} + +void * ImplCreateBig5HkscsToUnicodeContext() +{ + ImplBig5HkscsToUnicodeContext * pContext = + new ImplBig5HkscsToUnicodeContext; + pContext->m_nRow = 0; + return pContext; +} + +void ImplResetBig5HkscsToUnicodeContext(void * pContext) +{ + if (pContext) + static_cast< ImplBig5HkscsToUnicodeContext * >(pContext)->m_nRow = 0; +} + +void ImplDestroyBig5HkscsToUnicodeContext(void * pContext) +{ + delete static_cast< ImplBig5HkscsToUnicodeContext * >(pContext); +} + +sal_Size ImplConvertBig5HkscsToUnicode(void const * pData, + void * pContext, + char const * pSrcBuf, + sal_Size nSrcBytes, + sal_Unicode * pDestBuf, + sal_Size nDestChars, + sal_uInt32 nFlags, + sal_uInt32 * pInfo, + sal_Size * pSrcCvtBytes) +{ + sal_uInt16 const * pBig5Hkscs2001Data + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pBig5Hkscs2001ToUnicodeData; + sal_Int32 const * pBig5Hkscs2001RowOffsets + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pBig5Hkscs2001ToUnicodeRowOffsets; + ImplDBCSToUniLeadTab const * pBig5Data + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pBig5ToUnicodeData; + sal_Int32 nRow = 0; + sal_uInt32 nInfo = 0; + sal_Size nConverted = 0; + sal_Unicode * pDestBufPtr = pDestBuf; + sal_Unicode * pDestBufEnd = pDestBuf + nDestChars; + sal_Size startOfCurrentChar = 0; + + if (pContext) + nRow = static_cast< ImplBig5HkscsToUnicodeContext * >(pContext)->m_nRow; + + for (; nConverted < nSrcBytes; ++nConverted) + { + bool bUndefined = true; + sal_uInt32 nChar = *reinterpret_cast<unsigned char const *>(pSrcBuf++); + if (nRow == 0) + if (nChar < 0x80) + if (pDestBufPtr != pDestBufEnd) { + *pDestBufPtr++ = static_cast<sal_Unicode>(nChar); + startOfCurrentChar = nConverted + 1; + } else + goto no_output; + else if (nChar >= 0x81 && nChar <= 0xFE) + nRow = nChar; + else + { + bUndefined = false; + goto bad_input; + } + else + if ((nChar >= 0x40 && nChar <= 0x7E) + || (nChar >= 0xA1 && nChar <= 0xFE)) + { + sal_uInt32 nUnicode = 0xFFFF; + sal_Int32 nOffset = pBig5Hkscs2001RowOffsets[nRow]; + sal_uInt32 nFirst=0; + sal_uInt32 nLast=0; + if (nOffset != -1) + { + sal_uInt32 nFirstLast = pBig5Hkscs2001Data[nOffset++]; + nFirst = nFirstLast & 0xFF; + nLast = nFirstLast >> 8; + if (nChar >= nFirst && nChar <= nLast) + nUnicode + = pBig5Hkscs2001Data[nOffset + (nChar - nFirst)]; + } + if (nUnicode == 0xFFFF) + { + sal_uInt32 n = pBig5Data[nRow].mnTrailStart; + if (nChar >= n && nChar <= pBig5Data[nRow].mnTrailEnd) + { + nUnicode = pBig5Data[nRow].mpToUniTrailTab[nChar - n]; + if (nUnicode == 0) + nUnicode = 0xFFFF; + assert(!rtl::isHighSurrogate(nUnicode)); + } + } + if (nUnicode == 0xFFFF) + { + ImplDBCSEUDCData const * p + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pEudcData; + sal_uInt32 nCount + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_nEudcCount; + sal_uInt32 i; + for (i = 0; i < nCount; ++i) + { + if (nRow >= p->mnLeadStart && nRow <= p->mnLeadEnd) + { + if (nChar < p->mnTrail1Start) + break; + if (nChar <= p->mnTrail1End) + { + nUnicode + = p->mnUniStart + + (nRow - p->mnLeadStart) + * p->mnTrailRangeCount + + (nChar - p->mnTrail1Start); + break; + } + if (p->mnTrailCount < 2 + || nChar < p->mnTrail2Start) + break; + if (nChar <= p->mnTrail2End) + { + nUnicode + = p->mnUniStart + + (nRow - p->mnLeadStart) + * p->mnTrailRangeCount + + (nChar - p->mnTrail2Start) + + (p->mnTrail1End - p->mnTrail1Start + + 1); + break; + } + if (p->mnTrailCount < 3 + || nChar < p->mnTrail3Start) + break; + if (nChar <= p->mnTrail3End) + { + nUnicode + = p->mnUniStart + + (nRow - p->mnLeadStart) + * p->mnTrailRangeCount + + (nChar - p->mnTrail3Start) + + (p->mnTrail1End - p->mnTrail1Start + + 1) + + (p->mnTrail2End - p->mnTrail2Start + + 1); + break; + } + break; + } + ++p; + } + assert(!rtl::isHighSurrogate(nUnicode)); + } + if (nUnicode == 0xFFFF) + goto bad_input; + if (rtl::isHighSurrogate(nUnicode)) + if (pDestBufEnd - pDestBufPtr >= 2) + { + nOffset += nLast - nFirst + 1; + nFirst = pBig5Hkscs2001Data[nOffset++]; + *pDestBufPtr++ = static_cast<sal_Unicode>(nUnicode); + *pDestBufPtr++ + = static_cast<sal_Unicode>(pBig5Hkscs2001Data[ + nOffset + (nChar - nFirst)]); + startOfCurrentChar = nConverted + 1; + } + else + goto no_output; + else + if (pDestBufPtr != pDestBufEnd) { + *pDestBufPtr++ = static_cast<sal_Unicode>(nUnicode); + startOfCurrentChar = nConverted + 1; + } else + goto no_output; + nRow = 0; + } + else + { + bUndefined = false; + goto bad_input; + } + continue; + + bad_input: + switch (sal::detail::textenc::handleBadInputTextToUnicodeConversion( + bUndefined, true, 0, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + nRow = 0; + if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) { + ++nConverted; + } else { + nConverted = startOfCurrentChar; + } + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + nRow = 0; + startOfCurrentChar = nConverted + 1; + continue; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + goto no_output; + } + break; + + no_output: + --pSrcBuf; + nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL; + break; + } + + if (nRow != 0 + && (nInfo & (RTL_TEXTTOUNICODE_INFO_ERROR + | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL)) + == 0) + { + if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) + nInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOOSMALL; + else + switch (sal::detail::textenc::handleBadInputTextToUnicodeConversion( + false, true, 0, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) != 0) { + nConverted = startOfCurrentChar; + } + [[fallthrough]]; + case sal::detail::textenc::BAD_INPUT_CONTINUE: + nRow = 0; + break; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL; + break; + } + } + + if (pContext) + static_cast< ImplBig5HkscsToUnicodeContext * >(pContext)->m_nRow = nRow; + if (pInfo) + *pInfo = nInfo; + if (pSrcCvtBytes) + *pSrcCvtBytes = nConverted; + + return pDestBufPtr - pDestBuf; +} + +sal_Size ImplConvertUnicodeToBig5Hkscs(void const * pData, + void * pContext, + sal_Unicode const * pSrcBuf, + sal_Size nSrcChars, + char * pDestBuf, + sal_Size nDestBytes, + sal_uInt32 nFlags, + sal_uInt32 * pInfo, + sal_Size * pSrcCvtChars) +{ + sal_uInt16 const * pBig5Hkscs2001Data + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pUnicodeToBig5Hkscs2001Data; + sal_Int32 const * pBig5Hkscs2001PageOffsets + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pUnicodeToBig5Hkscs2001PageOffsets; + sal_Int32 const * pBig5Hkscs2001PlaneOffsets + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pUnicodeToBig5Hkscs2001PlaneOffsets; + ImplUniToDBCSHighTab const * pBig5Data + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pUnicodeToBig5Data; + sal_Unicode nHighSurrogate = 0; + sal_uInt32 nInfo = 0; + sal_Size nConverted = 0; + char * pDestBufPtr = pDestBuf; + char * pDestBufEnd = pDestBuf + nDestBytes; + + if (pContext) + nHighSurrogate + = static_cast<ImplUnicodeToTextContext *>(pContext)->m_nHighSurrogate; + + for (; nConverted < nSrcChars; ++nConverted) + { + bool bUndefined = true; + sal_uInt32 nChar = *pSrcBuf++; + if (nHighSurrogate == 0) + { + if (rtl::isHighSurrogate(nChar)) + { + nHighSurrogate = static_cast<sal_Unicode>(nChar); + continue; + } + else if (rtl::isLowSurrogate(nChar)) + { + bUndefined = false; + goto bad_input; + } + } + else if (rtl::isLowSurrogate(nChar)) + nChar = rtl::combineSurrogates(nHighSurrogate, nChar); + else + { + bUndefined = false; + goto bad_input; + } + + assert(rtl::isUnicodeScalarValue(nChar)); + + if (nChar < 0x80) + if (pDestBufPtr != pDestBufEnd) + *pDestBufPtr++ = static_cast< char >(nChar); + else + goto no_output; + else + { + sal_uInt32 nBytes = 0; + sal_Int32 nOffset = pBig5Hkscs2001PlaneOffsets[nChar >> 16]; + if (nOffset != -1) + { + nOffset + = pBig5Hkscs2001PageOffsets[nOffset + ((nChar & 0xFF00) + >> 8)]; + if (nOffset != -1) + { + sal_uInt32 nFirstLast = pBig5Hkscs2001Data[nOffset++]; + sal_uInt32 nFirst = nFirstLast & 0xFF; + sal_uInt32 nLast = nFirstLast >> 8; + sal_uInt32 nIndex = nChar & 0xFF; + if (nIndex >= nFirst && nIndex <= nLast) + { + nBytes + = pBig5Hkscs2001Data[nOffset + (nIndex - nFirst)]; + } + } + } + if (nBytes == 0) + { + sal_uInt32 nIndex1 = nChar >> 8; + if (nIndex1 < 0x100) + { + sal_uInt32 nIndex2 = nChar & 0xFF; + sal_uInt32 nFirst = pBig5Data[nIndex1].mnLowStart; + if (nIndex2 >= nFirst + && nIndex2 <= pBig5Data[nIndex1].mnLowEnd) + nBytes = pBig5Data[nIndex1]. + mpToUniTrailTab[nIndex2 - nFirst]; + } + } + if (nBytes == 0) + { + ImplDBCSEUDCData const * p + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_pEudcData; + sal_uInt32 nCount + = static_cast< ImplBig5HkscsConverterData const * >(pData)-> + m_nEudcCount; + sal_uInt32 i; + for (i = 0; i < nCount; ++i) { + if (nChar >= p->mnUniStart && nChar <= p->mnUniEnd) + { + sal_uInt32 nIndex = nChar - p->mnUniStart; + sal_uInt32 nLeadOff = nIndex / p->mnTrailRangeCount; + sal_uInt32 nTrailOff = nIndex % p->mnTrailRangeCount; + sal_uInt32 nSize; + nBytes = (p->mnLeadStart + nLeadOff) << 8; + nSize = p->mnTrail1End - p->mnTrail1Start + 1; + if (nTrailOff < nSize) + { + nBytes |= p->mnTrail1Start + nTrailOff; + break; + } + nTrailOff -= nSize; + nSize = p->mnTrail2End - p->mnTrail2Start + 1; + if (nTrailOff < nSize) + { + nBytes |= p->mnTrail2Start + nTrailOff; + break; + } + nTrailOff -= nSize; + nBytes |= p->mnTrail3Start + nTrailOff; + break; + } + ++p; + } + } + if (nBytes == 0) + goto bad_input; + if (pDestBufEnd - pDestBufPtr >= 2) + { + *pDestBufPtr++ = static_cast< char >(nBytes >> 8); + *pDestBufPtr++ = static_cast< char >(nBytes & 0xFF); + } + else + goto no_output; + } + nHighSurrogate = 0; + continue; + + bad_input: + switch (sal::detail::textenc::handleBadInputUnicodeToTextConversion( + bUndefined, nChar, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo, nullptr, 0, nullptr)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + nHighSurrogate = 0; + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + nHighSurrogate = 0; + continue; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + goto no_output; + } + break; + + no_output: + --pSrcBuf; + nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; + break; + } + + if (nHighSurrogate != 0 + && (nInfo & (RTL_UNICODETOTEXT_INFO_ERROR + | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL)) + == 0) + { + if ((nFlags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0) + nInfo |= RTL_UNICODETOTEXT_INFO_SRCBUFFERTOSMALL; + else + switch (sal::detail::textenc::handleBadInputUnicodeToTextConversion( + false, 0, nFlags, &pDestBufPtr, pDestBufEnd, &nInfo, + nullptr, 0, nullptr)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + case sal::detail::textenc::BAD_INPUT_CONTINUE: + nHighSurrogate = 0; + break; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; + break; + } + } + + if (pContext) + static_cast<ImplUnicodeToTextContext *>(pContext)->m_nHighSurrogate + = nHighSurrogate; + if (pInfo) + *pInfo = nInfo; + if (pSrcCvtChars) + *pSrcCvtChars = nConverted; + + return pDestBufPtr - pDestBuf; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |