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Diffstat (limited to '')
| -rw-r--r-- | sal/textenc/convertiso2022jp.cxx | 581 |
1 files changed, 581 insertions, 0 deletions
diff --git a/sal/textenc/convertiso2022jp.cxx b/sal/textenc/convertiso2022jp.cxx new file mode 100644 index 000000000..935bc8515 --- /dev/null +++ b/sal/textenc/convertiso2022jp.cxx @@ -0,0 +1,581 @@ +/* -*- 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 "converter.hxx" +#include "convertiso2022jp.hxx" +#include "tenchelp.hxx" +#include "unichars.hxx" + +namespace { + +enum ImplIso2022JpToUnicodeState // order is important: +{ + IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_JIS_ROMAN, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208_2, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_LPAREN, + IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_DOLLAR +}; + +struct ImplIso2022JpToUnicodeContext +{ + ImplIso2022JpToUnicodeState m_eState; + sal_uInt32 m_nRow; +}; + +struct ImplUnicodeToIso2022JpContext +{ + sal_Unicode m_nHighSurrogate; + bool m_b0208; +}; + +} + +void * ImplCreateIso2022JpToUnicodeContext() +{ + ImplIso2022JpToUnicodeContext * pContext = + new ImplIso2022JpToUnicodeContext; + pContext->m_eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + return pContext; +} + +void ImplResetIso2022JpToUnicodeContext(void * pContext) +{ + if (pContext) + static_cast< ImplIso2022JpToUnicodeContext * >(pContext)->m_eState + = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; +} + +void ImplDestroyIso2022JpToUnicodeContext(void * pContext) +{ + delete static_cast< ImplIso2022JpToUnicodeContext * >(pContext); +} + +sal_Size ImplConvertIso2022JpToUnicode(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) +{ + ImplDBCSToUniLeadTab const * pJisX0208Data + = static_cast< ImplIso2022JpConverterData const * >(pData)-> + m_pJisX0208ToUnicodeData; + ImplIso2022JpToUnicodeState eState + = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + sal_uInt32 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< ImplIso2022JpToUnicodeContext * >(pContext)->m_eState; + nRow = static_cast< ImplIso2022JpToUnicodeContext * >(pContext)->m_nRow; + } + + for (; nConverted < nSrcBytes; ++nConverted) + { + bool bUndefined = true; + sal_uInt32 nChar = *reinterpret_cast<unsigned char const *>(pSrcBuf++); + switch (eState) + { + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII: + if (nChar == 0x1B) // ESC + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC; + else if (nChar < 0x80) + if (pDestBufPtr != pDestBufEnd) { + *pDestBufPtr++ = static_cast<sal_Unicode>(nChar); + startOfCurrentChar = nConverted + 1; + } else + goto no_output; + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_JIS_ROMAN: + if (nChar == 0x1B) // ESC + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC; + else if (nChar < 0x80) + if (pDestBufPtr != pDestBufEnd) + { + switch (nChar) + { + case 0x5C: // REVERSE SOLIDUS (\) + nChar = 0xA5; // YEN SIGN + break; + + case 0x7E: // ~ + nChar = 0xAF; // MACRON + break; + } + *pDestBufPtr++ = static_cast<sal_Unicode>(nChar); + startOfCurrentChar = nConverted + 1; + } + else + goto no_output; + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208: + if (nChar == 0x1B) // ESC + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC; + else if (nChar >= 0x21 && nChar <= 0x7E) + { + nRow = nChar; + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208_2; + } + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208_2: + if (nChar >= 0x21 && nChar <= 0x7E) + { + sal_uInt16 nUnicode = 0; + sal_uInt32 nFirst = pJisX0208Data[nRow].mnTrailStart; + if (nChar >= nFirst + && nChar <= pJisX0208Data[nRow].mnTrailEnd) + nUnicode = pJisX0208Data[nRow]. + mpToUniTrailTab[nChar - nFirst]; + if (nUnicode != 0) + if (pDestBufPtr != pDestBufEnd) + { + *pDestBufPtr++ = static_cast<sal_Unicode>(nUnicode); + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208; + startOfCurrentChar = nConverted + 1; + } + else + goto no_output; + else + goto bad_input; + } + else + { + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC: + switch (nChar) + { + case 0x24: // $ + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_DOLLAR; + break; + + case 0x28: // ( + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_LPAREN; + break; + + default: + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_LPAREN: + switch (nChar) + { + case 0x42: // B + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + break; + + case 0x4A: // J + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_JIS_ROMAN; + break; + + default: + bUndefined = false; + goto bad_input; + } + break; + + case IMPL_ISO_2022_JP_TO_UNICODE_STATE_ESC_DOLLAR: + switch (nChar) + { + case 0x40: // @ + case 0x42: // B + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_0208; + break; + + default: + bUndefined = false; + goto bad_input; + } + break; + } + continue; + + bad_input: + switch (sal::detail::textenc::handleBadInputTextToUnicodeConversion( + bUndefined, true, 0, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) { + ++nConverted; + } else { + nConverted = startOfCurrentChar; + } + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + eState = IMPL_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + 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_ISO_2022_JP_TO_UNICODE_STATE_0208 + && (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_ISO_2022_JP_TO_UNICODE_STATE_ASCII; + break; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL; + break; + } + } + + if (pContext) + { + static_cast< ImplIso2022JpToUnicodeContext * >(pContext)->m_eState = eState; + static_cast< ImplIso2022JpToUnicodeContext * >(pContext)->m_nRow = nRow; + } + if (pInfo) + *pInfo = nInfo; + if (pSrcCvtBytes) + *pSrcCvtBytes = nConverted; + + return pDestBufPtr - pDestBuf; +} + +void * ImplCreateUnicodeToIso2022JpContext() +{ + ImplUnicodeToIso2022JpContext * pContext = + new ImplUnicodeToIso2022JpContext; + pContext->m_nHighSurrogate = 0; + pContext->m_b0208 = false; + return pContext; +} + +void ImplResetUnicodeToIso2022JpContext(void * pContext) +{ + if (pContext) + { + static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_nHighSurrogate = 0; + static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_b0208 = false; + } +} + +void ImplDestroyUnicodeToIso2022JpContext(void * pContext) +{ + delete static_cast< ImplUnicodeToIso2022JpContext * >(pContext); +} + +sal_Size ImplConvertUnicodeToIso2022Jp(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) +{ + ImplUniToDBCSHighTab const * pJisX0208Data + = static_cast< ImplIso2022JpConverterData const * >(pData)-> + m_pUnicodeToJisX0208Data; + sal_Unicode nHighSurrogate = 0; + bool b0208 = false; + sal_uInt32 nInfo = 0; + sal_Size nConverted = 0; + char * pDestBufPtr = pDestBuf; + char * pDestBufEnd = pDestBuf + nDestBytes; + bool bWritten; + + if (pContext) + { + nHighSurrogate + = static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_nHighSurrogate; + b0208 = static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_b0208; + } + + 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 == 0x0A || nChar == 0x0D) // LF, CR + { + if (b0208) + { + if (pDestBufEnd - pDestBufPtr >= 3) + { + *pDestBufPtr++ = 0x1B; // ESC + *pDestBufPtr++ = 0x28; // ( + *pDestBufPtr++ = 0x42; // B + b0208 = false; + } + else + goto no_output; + } + if (pDestBufPtr != pDestBufEnd) + *pDestBufPtr++ = static_cast< char >(nChar); + else + goto no_output; + } + else if (nChar == 0x1B) + goto bad_input; + else if (nChar < 0x80) + { + if (b0208) + { + if (pDestBufEnd - pDestBufPtr >= 3) + { + *pDestBufPtr++ = 0x1B; // ESC + *pDestBufPtr++ = 0x28; // ( + *pDestBufPtr++ = 0x42; // B + b0208 = false; + } + else + goto no_output; + } + if (pDestBufPtr != pDestBufEnd) + *pDestBufPtr++ = static_cast< char >(nChar); + else + goto no_output; + } + else + { + sal_uInt16 nBytes = 0; + sal_uInt32 nIndex1 = nChar >> 8; + if (nIndex1 < 0x100) + { + sal_uInt32 nIndex2 = nChar & 0xFF; + sal_uInt32 nFirst = pJisX0208Data[nIndex1].mnLowStart; + if (nIndex2 >= nFirst + && nIndex2 <= pJisX0208Data[nIndex1].mnLowEnd) + { + nBytes = pJisX0208Data[nIndex1]. + mpToUniTrailTab[nIndex2 - nFirst]; + if (nBytes == 0) + // For some reason, the tables in tcvtjp4.tab do not + // include these two conversions: + switch (nChar) + { + case 0xA5: // YEN SIGN + nBytes = 0x216F; + break; + + case 0xAF: // MACRON + nBytes = 0x2131; + break; + } + } + } + if (nBytes != 0) + { + if (!b0208) + { + if (pDestBufEnd - pDestBufPtr >= 3) + { + *pDestBufPtr++ = 0x1B; // ESC + *pDestBufPtr++ = 0x24; // $ + *pDestBufPtr++ = 0x42; // B + b0208 = true; + } + else + goto no_output; + } + if (pDestBufEnd - pDestBufPtr >= 2) + { + *pDestBufPtr++ = static_cast< char >(nBytes >> 8); + *pDestBufPtr++ = static_cast< char >(nBytes & 0xFF); + } + else + goto no_output; + } + else + goto bad_input; + } + nHighSurrogate = 0; + continue; + + bad_input: + switch (sal::detail::textenc::handleBadInputUnicodeToTextConversion( + bUndefined, nChar, nFlags, &pDestBufPtr, pDestBufEnd, + &nInfo, "\x1B(B", b0208 ? 3 : 0, &bWritten)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + nHighSurrogate = 0; + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + if (bWritten) + b0208 = false; + 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 ((nInfo & (RTL_UNICODETOTEXT_INFO_ERROR + | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL)) + == 0) + { + bool bFlush = true; + if (nHighSurrogate != 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, + "\x1B(B", b0208 ? 3 : 0, &bWritten)) + { + case sal::detail::textenc::BAD_INPUT_STOP: + nHighSurrogate = 0; + bFlush = false; + break; + + case sal::detail::textenc::BAD_INPUT_CONTINUE: + if (bWritten) + b0208 = false; + nHighSurrogate = 0; + break; + + case sal::detail::textenc::BAD_INPUT_NO_OUTPUT: + nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; + break; + } + } + if (bFlush + && b0208 + && (nFlags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0) + { + if (pDestBufEnd - pDestBufPtr >= 3) + { + *pDestBufPtr++ = 0x1B; // ESC + *pDestBufPtr++ = 0x28; // ( + *pDestBufPtr++ = 0x42; // B + b0208 = false; + } + else + nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; + } + } + + if (pContext) + { + static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_nHighSurrogate + = nHighSurrogate; + static_cast< ImplUnicodeToIso2022JpContext * >(pContext)->m_b0208 = b0208; + } + if (pInfo) + *pInfo = nInfo; + if (pSrcCvtChars) + *pSrcCvtChars = nConverted; + + return pDestBufPtr - pDestBuf; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |