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Diffstat (limited to '')
| -rw-r--r-- | sal/textenc/converteuctw.cxx | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/sal/textenc/converteuctw.cxx b/sal/textenc/converteuctw.cxx new file mode 100644 index 000000000..8684b643c --- /dev/null +++ b/sal/textenc/converteuctw.cxx @@ -0,0 +1,461 @@ +/* -*- 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 "converter.hxx" +#include "converteuctw.hxx" +#include "tenchelp.hxx" +#include "unichars.hxx" + +namespace { + +enum ImplEucTwToUnicodeState +{ + IMPL_EUC_TW_TO_UNICODE_STATE_0, + IMPL_EUC_TW_TO_UNICODE_STATE_1, + IMPL_EUC_TW_TO_UNICODE_STATE_2_1, + IMPL_EUC_TW_TO_UNICODE_STATE_2_2, + IMPL_EUC_TW_TO_UNICODE_STATE_2_3 +}; + +struct ImplEucTwToUnicodeContext +{ + ImplEucTwToUnicodeState m_eState; + sal_Int32 m_nPlane; // 0--15 + sal_Int32 m_nRow; // 0--93 +}; + +} + +void * ImplCreateEucTwToUnicodeContext() +{ + ImplEucTwToUnicodeContext * pContext = new ImplEucTwToUnicodeContext; + pContext->m_eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; + return pContext; +} + +void ImplResetEucTwToUnicodeContext(void * pContext) +{ + if (pContext) + static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState + = IMPL_EUC_TW_TO_UNICODE_STATE_0; +} + +void ImplDestroyEucTwToUnicodeContext(void * pContext) +{ + delete static_cast< ImplEucTwToUnicodeContext * >(pContext); +} + +sal_Size ImplConvertEucTwToUnicode(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 * pCns116431992Data + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pCns116431992ToUnicodeData; + sal_Int32 const * pCns116431992RowOffsets + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pCns116431992ToUnicodeRowOffsets; + sal_Int32 const * pCns116431992PlaneOffsets + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pCns116431992ToUnicodePlaneOffsets; + ImplEucTwToUnicodeState eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; + sal_Int32 nPlane = 0; + 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) + { + eState = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState; + nPlane = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nPlane; + nRow = static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nRow; + } + + for (; nConverted < nSrcBytes; ++nConverted) + { + bool bUndefined = true; + sal_uInt32 nChar = *reinterpret_cast<unsigned char const *>(pSrcBuf++); + switch (eState) + { + case IMPL_EUC_TW_TO_UNICODE_STATE_0: + if (nChar < 0x80) + if (pDestBufPtr != pDestBufEnd) { + *pDestBufPtr++ = static_cast<sal_Unicode>(nChar); + startOfCurrentChar = nConverted + 1; + } else + goto no_output; + else if (nChar >= 0xA1 && nChar <= 0xFE) + { + nRow = nChar - 0xA1; + eState = IMPL_EUC_TW_TO_UNICODE_STATE_1; + } + else if (nChar == 0x8E) + eState = IMPL_EUC_TW_TO_UNICODE_STATE_2_1; + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_EUC_TW_TO_UNICODE_STATE_1: + if (nChar >= 0xA1 && nChar <= 0xFE) + { + nPlane = 0; + goto transform; + } + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_EUC_TW_TO_UNICODE_STATE_2_1: + if (nChar >= 0xA1 && nChar <= 0xB0) + { + nPlane = nChar - 0xA1; + eState = IMPL_EUC_TW_TO_UNICODE_STATE_2_2; + } + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_EUC_TW_TO_UNICODE_STATE_2_2: + if (nChar >= 0xA1 && nChar <= 0xFE) + { + nRow = nChar - 0xA1; + eState = IMPL_EUC_TW_TO_UNICODE_STATE_2_3; + } + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_EUC_TW_TO_UNICODE_STATE_2_3: + if (nChar >= 0xA1 && nChar <= 0xFE) + goto transform; + else + { + bUndefined = false; + goto bad_input; + } + break; + } + continue; + + transform: + { + sal_Int32 nPlaneOffset = pCns116431992PlaneOffsets[nPlane]; + if (nPlaneOffset == -1) + goto bad_input; + else + { + sal_Int32 nOffset + = pCns116431992RowOffsets[nPlaneOffset + nRow]; + if (nOffset == -1) + goto bad_input; + else + { + sal_uInt32 nFirstLast = pCns116431992Data[nOffset++]; + sal_uInt32 nFirst = nFirstLast & 0xFF; + sal_uInt32 nLast = nFirstLast >> 8; + nChar -= 0xA0; + if (nChar >= nFirst && nChar <= nLast) + { + sal_uInt32 nUnicode + = pCns116431992Data[nOffset + (nChar - nFirst)]; + if (nUnicode == 0xFFFF) + goto bad_input; + else if (rtl::isHighSurrogate(nUnicode)) + if (pDestBufEnd - pDestBufPtr >= 2) + { + nOffset += nLast - nFirst + 1; + nFirst = pCns116431992Data[nOffset++]; + *pDestBufPtr++ = static_cast<sal_Unicode>(nUnicode); + *pDestBufPtr++ + = static_cast<sal_Unicode>(pCns116431992Data[ + 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; + } + else + goto bad_input; + eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; + } + } + continue; + } + + bad_input: + switch (sal::detail::textenc::handleBadInputTextToUnicodeConversion( + bUndefined, true, 0, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; + if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) { + ++nConverted; + } else { + nConverted = startOfCurrentChar; + } + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + eState = IMPL_EUC_TW_TO_UNICODE_STATE_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 (eState != IMPL_EUC_TW_TO_UNICODE_STATE_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: + eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; + break; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL; + break; + } + } + + if (pContext) + { + static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_eState = eState; + static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nPlane = nPlane; + static_cast< ImplEucTwToUnicodeContext * >(pContext)->m_nRow = nRow; + } + if (pInfo) + *pInfo = nInfo; + if (pSrcCvtBytes) + *pSrcCvtBytes = nConverted; + + return pDestBufPtr - pDestBuf; +} + +sal_Size ImplConvertUnicodeToEucTw(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_uInt8 const * pCns116431992Data + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pUnicodeToCns116431992Data; + sal_Int32 const * pCns116431992PageOffsets + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pUnicodeToCns116431992PageOffsets; + sal_Int32 const * pCns116431992PlaneOffsets + = static_cast< ImplEucTwConverterData const * >(pData)-> + m_pUnicodeToCns116431992PlaneOffsets; + 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_Int32 nOffset = pCns116431992PlaneOffsets[nChar >> 16]; + sal_uInt32 nFirst; + sal_uInt32 nLast; + sal_uInt32 nPlane; + if (nOffset == -1) + goto bad_input; + nOffset + = pCns116431992PageOffsets[nOffset + ((nChar & 0xFF00) >> 8)]; + if (nOffset == -1) + goto bad_input; + nFirst = pCns116431992Data[nOffset++]; + nLast = pCns116431992Data[nOffset++]; + nChar &= 0xFF; + if (nChar < nFirst || nChar > nLast) + goto bad_input; + nOffset += 3 * (nChar - nFirst); + nPlane = pCns116431992Data[nOffset++]; + if (nPlane == 0) + goto bad_input; + if (pDestBufEnd - pDestBufPtr < (nPlane == 1 ? 2 : 4)) + goto no_output; + if (nPlane != 1) + { + *pDestBufPtr++ = static_cast< char >(static_cast< unsigned char >(0x8E)); + *pDestBufPtr++ = static_cast< char >(0xA0 + nPlane); + } + *pDestBufPtr++ = static_cast< char >(0xA0 + pCns116431992Data[nOffset++]); + *pDestBufPtr++ = static_cast< char >(0xA0 + pCns116431992Data[nOffset]); + } + 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: */ |