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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /sal/textenc/convertgb18030.cxx
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sal/textenc/convertgb18030.cxx')
-rw-r--r--sal/textenc/convertgb18030.cxx478
1 files changed, 478 insertions, 0 deletions
diff --git a/sal/textenc/convertgb18030.cxx b/sal/textenc/convertgb18030.cxx
new file mode 100644
index 000000000..88f5a999d
--- /dev/null
+++ b/sal/textenc/convertgb18030.cxx
@@ -0,0 +1,478 @@
+/* -*- 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 "convertgb18030.hxx"
+#include "tenchelp.hxx"
+#include "unichars.hxx"
+
+namespace {
+
+enum ImplGb18030ToUnicodeState
+{
+ IMPL_GB_18030_TO_UNICODE_STATE_0,
+ IMPL_GB_18030_TO_UNICODE_STATE_1,
+ IMPL_GB_18030_TO_UNICODE_STATE_2,
+ IMPL_GB_18030_TO_UNICODE_STATE_3
+};
+
+struct ImplGb18030ToUnicodeContext
+{
+ ImplGb18030ToUnicodeState m_eState;
+ sal_uInt32 m_nCode;
+};
+
+}
+
+void * ImplCreateGb18030ToUnicodeContext()
+{
+ ImplGb18030ToUnicodeContext * pContext = new ImplGb18030ToUnicodeContext;
+ pContext->m_eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
+ return pContext;
+}
+
+void ImplResetGb18030ToUnicodeContext(void * pContext)
+{
+ if (pContext)
+ static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_eState
+ = IMPL_GB_18030_TO_UNICODE_STATE_0;
+}
+
+void ImplDestroyGb18030ToUnicodeContext(void * pContext)
+{
+ delete static_cast< ImplGb18030ToUnicodeContext * >(pContext);
+}
+
+sal_Size ImplConvertGb18030ToUnicode(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_Unicode const * pGb18030Data
+ = static_cast< ImplGb18030ConverterData const * >(pData)->m_pGb18030ToUnicodeData;
+ ImplGb180302000ToUnicodeRange const * pGb18030Ranges
+ = static_cast< ImplGb18030ConverterData const * >(pData)->
+ m_pGb18030ToUnicodeRanges;
+ ImplGb18030ToUnicodeState eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
+ sal_uInt32 nCode = 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< ImplGb18030ToUnicodeContext * >(pContext)->m_eState;
+ nCode = static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_nCode;
+ }
+
+ for (; nConverted < nSrcBytes; ++nConverted)
+ {
+ bool bUndefined = true;
+ sal_uInt32 nChar = *reinterpret_cast<unsigned char const *>(pSrcBuf++);
+ switch (eState)
+ {
+ case IMPL_GB_18030_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 == 0x80)
+ goto bad_input;
+ else if (nChar <= 0xFE)
+ {
+ nCode = nChar - 0x81;
+ eState = IMPL_GB_18030_TO_UNICODE_STATE_1;
+ }
+ else
+ {
+ bUndefined = false;
+ goto bad_input;
+ }
+ break;
+
+ case IMPL_GB_18030_TO_UNICODE_STATE_1:
+ if (nChar >= 0x30 && nChar <= 0x39)
+ {
+ nCode = nCode * 10 + (nChar - 0x30);
+ eState = IMPL_GB_18030_TO_UNICODE_STATE_2;
+ }
+ else if ((nChar >= 0x40 && nChar <= 0x7E)
+ || (nChar >= 0x80 && nChar <= 0xFE))
+ {
+ nCode = nCode * 190 + (nChar <= 0x7E ? nChar - 0x40 :
+ nChar - 0x80 + 63);
+ if (pDestBufPtr != pDestBufEnd) {
+ *pDestBufPtr++ = pGb18030Data[nCode];
+ startOfCurrentChar = nConverted + 1;
+ } else
+ goto no_output;
+ eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
+ }
+ else
+ {
+ bUndefined = false;
+ goto bad_input;
+ }
+ break;
+
+ case IMPL_GB_18030_TO_UNICODE_STATE_2:
+ if (nChar >= 0x81 && nChar <= 0xFE)
+ {
+ nCode = nCode * 126 + (nChar - 0x81);
+ eState = IMPL_GB_18030_TO_UNICODE_STATE_3;
+ }
+ else
+ {
+ bUndefined = false;
+ goto bad_input;
+ }
+ break;
+
+ case IMPL_GB_18030_TO_UNICODE_STATE_3:
+ if (nChar >= 0x30 && nChar <= 0x39)
+ {
+ nCode = nCode * 10 + (nChar - 0x30);
+
+ // 90 30 81 30 to E3 32 9A 35 maps to U+10000 to U+10FFFF:
+ if (nCode >= 189000 && nCode <= 1237575)
+ if (pDestBufEnd - pDestBufPtr >= 2)
+ {
+ nCode -= 189000 - 0x10000;
+ *pDestBufPtr++
+ = static_cast<sal_Unicode>(ImplGetHighSurrogate(nCode));
+ *pDestBufPtr++
+ = static_cast<sal_Unicode>(ImplGetLowSurrogate(nCode));
+ startOfCurrentChar = nConverted + 1;
+ }
+ else
+ goto no_output;
+ else
+ {
+ ImplGb180302000ToUnicodeRange const * pRange
+ = pGb18030Ranges;
+ sal_uInt32 nFirstNonRange = 0;
+ for (;;)
+ {
+ if (pRange->m_nNonRangeDataIndex == -1)
+ goto bad_input;
+ else if (nCode < pRange->m_nFirstLinear)
+ {
+ if (pDestBufPtr != pDestBufEnd) {
+ *pDestBufPtr++
+ = pGb18030Data[
+ pRange->m_nNonRangeDataIndex
+ + (nCode - nFirstNonRange)];
+ startOfCurrentChar = nConverted + 1;
+ } else
+ goto no_output;
+ break;
+ }
+ else if (nCode < pRange->m_nPastLinear)
+ {
+ if (pDestBufPtr != pDestBufEnd) {
+ *pDestBufPtr++
+ = static_cast<sal_Unicode>(pRange->m_nFirstUnicode
+ + (nCode
+ - pRange->
+ m_nFirstLinear));
+ startOfCurrentChar = nConverted + 1;
+ } else
+ goto no_output;
+ break;
+ }
+ nFirstNonRange = (pRange++)->m_nPastLinear;
+ }
+ }
+ eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
+ }
+ else
+ {
+ 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_GB_18030_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_GB_18030_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_GB_18030_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_GB_18030_TO_UNICODE_STATE_0;
+ break;
+
+ case sal::detail::textenc::BAD_INPUT_NO_OUTPUT:
+ nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
+ break;
+ }
+ }
+
+ if (pContext)
+ {
+ static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_eState = eState;
+ static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_nCode = nCode;
+ }
+ if (pInfo)
+ *pInfo = nInfo;
+ if (pSrcCvtBytes)
+ *pSrcCvtBytes = nConverted;
+
+ return pDestBufPtr - pDestBuf;
+}
+
+sal_Size ImplConvertUnicodeToGb18030(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_uInt32 const * pGb18030Data
+ = static_cast< ImplGb18030ConverterData const * >(pData)->
+ m_pUnicodeToGb18030Data;
+ ImplUnicodeToGb180302000Range const * pGb18030Ranges
+ = static_cast< ImplGb18030ConverterData const * >(pData)->
+ m_pUnicodeToGb18030Ranges;
+ 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 (ImplIsHighSurrogate(nChar))
+ {
+ nHighSurrogate = static_cast<sal_Unicode>(nChar);
+ continue;
+ }
+ else if (ImplIsLowSurrogate(nChar))
+ {
+ bUndefined = false;
+ goto bad_input;
+ }
+ }
+ else if (ImplIsLowSurrogate(nChar))
+ nChar = ImplCombineSurrogates(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 if (nChar < 0x10000)
+ {
+ ImplUnicodeToGb180302000Range const * pRange = pGb18030Ranges;
+ sal_Unicode nFirstNonRange = 0x80;
+ for (;;)
+ {
+ if (nChar < pRange->m_nFirstUnicode)
+ {
+ sal_uInt32 nCode
+ = pGb18030Data[pRange->m_nNonRangeDataIndex
+ + (nChar - nFirstNonRange)];
+ if (pDestBufEnd - pDestBufPtr
+ >= (nCode <= 0xFFFF ? 2 : 4))
+ {
+ if (nCode > 0xFFFF)
+ {
+ *pDestBufPtr++ = static_cast< char >(nCode >> 24);
+ *pDestBufPtr++ = static_cast< char >(nCode >> 16 & 0xFF);
+ }
+ *pDestBufPtr++ = static_cast< char >(nCode >> 8 & 0xFF);
+ *pDestBufPtr++ = static_cast< char >(nCode & 0xFF);
+ }
+ else
+ goto no_output;
+ break;
+ }
+ if (nChar <= pRange->m_nLastUnicode)
+ {
+ if (pDestBufEnd - pDestBufPtr >= 4)
+ {
+ sal_uInt32 nCode
+ = pRange->m_nFirstLinear
+ + (nChar - pRange->m_nFirstUnicode);
+ *pDestBufPtr++ = static_cast< char >(nCode / 12600 + 0x81);
+ *pDestBufPtr++
+ = static_cast< char >(nCode / 1260 % 10 + 0x30);
+ *pDestBufPtr++ = static_cast< char >(nCode / 10 % 126 + 0x81);
+ *pDestBufPtr++ = static_cast< char >(nCode % 10 + 0x30);
+ }
+ else
+ goto no_output;
+ break;
+ }
+ nFirstNonRange
+ = static_cast<sal_Unicode>((pRange++)->m_nLastUnicode + 1);
+ }
+ }
+ else
+ if (pDestBufEnd - pDestBufPtr >= 4)
+ {
+ sal_uInt32 nCode = nChar - 0x10000;
+ *pDestBufPtr++ = static_cast< char >(nCode / 12600 + 0x90);
+ *pDestBufPtr++ = static_cast< char >(nCode / 1260 % 10 + 0x30);
+ *pDestBufPtr++ = static_cast< char >(nCode / 10 % 126 + 0x81);
+ *pDestBufPtr++ = static_cast< char >(nCode % 10 + 0x30);
+ }
+ 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: */