459 lines
16 KiB
C++
459 lines
16 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 "convertgb18030.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 ImplGb18030ToUnicodeState
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{
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IMPL_GB_18030_TO_UNICODE_STATE_0,
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IMPL_GB_18030_TO_UNICODE_STATE_1,
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IMPL_GB_18030_TO_UNICODE_STATE_2,
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IMPL_GB_18030_TO_UNICODE_STATE_3
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};
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struct ImplGb18030ToUnicodeContext
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{
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ImplGb18030ToUnicodeState m_eState;
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sal_uInt32 m_nCode;
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};
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}
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void * ImplCreateGb18030ToUnicodeContext()
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{
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ImplGb18030ToUnicodeContext * pContext = new ImplGb18030ToUnicodeContext;
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pContext->m_eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
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return pContext;
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}
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void ImplResetGb18030ToUnicodeContext(void * pContext)
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{
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if (pContext)
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static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_eState
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= IMPL_GB_18030_TO_UNICODE_STATE_0;
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}
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void ImplDestroyGb18030ToUnicodeContext(void * pContext)
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{
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delete static_cast< ImplGb18030ToUnicodeContext * >(pContext);
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}
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sal_Size ImplConvertGb18030ToUnicode(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_Unicode const * pGb18030Data
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= static_cast< ImplGb18030ConverterData const * >(pData)->m_pGb18030ToUnicodeData;
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ImplGb180302000ToUnicodeRange const * pGb18030Ranges
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= static_cast< ImplGb18030ConverterData const * >(pData)->
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m_pGb18030ToUnicodeRanges;
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ImplGb18030ToUnicodeState eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
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sal_uInt32 nCode = 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< ImplGb18030ToUnicodeContext * >(pContext)->m_eState;
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nCode = static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_nCode;
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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 = *(unsigned char const *) pSrcBuf++;
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switch (eState)
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{
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case IMPL_GB_18030_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 == 0x80)
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goto bad_input;
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else if (nChar <= 0xFE)
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{
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nCode = nChar - 0x81;
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eState = IMPL_GB_18030_TO_UNICODE_STATE_1;
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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_GB_18030_TO_UNICODE_STATE_1:
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if (nChar >= 0x30 && nChar <= 0x39)
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{
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nCode = nCode * 10 + (nChar - 0x30);
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eState = IMPL_GB_18030_TO_UNICODE_STATE_2;
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}
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else if ((nChar >= 0x40 && nChar <= 0x7E)
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|| (nChar >= 0x80 && nChar <= 0xFE))
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{
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nCode = nCode * 190 + (nChar <= 0x7E ? nChar - 0x40 :
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nChar - 0x80 + 63);
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++ = pGb18030Data[nCode];
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else
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goto no_output;
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eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
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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_GB_18030_TO_UNICODE_STATE_2:
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if (nChar >= 0x81 && nChar <= 0xFE)
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{
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nCode = nCode * 126 + (nChar - 0x81);
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eState = IMPL_GB_18030_TO_UNICODE_STATE_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_GB_18030_TO_UNICODE_STATE_3:
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if (nChar >= 0x30 && nChar <= 0x39)
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{
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nCode = nCode * 10 + (nChar - 0x30);
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// 90 30 81 30 to E3 32 9A 35 maps to U+10000 to U+10FFFF:
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if (nCode >= 189000 && nCode <= 1237575)
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if (pDestBufEnd - pDestBufPtr >= 2)
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{
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nCode -= 189000 - 0x10000;
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*pDestBufPtr++
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= (sal_Unicode) ImplGetHighSurrogate(nCode);
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*pDestBufPtr++
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= (sal_Unicode) ImplGetLowSurrogate(nCode);
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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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{
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ImplGb180302000ToUnicodeRange const * pRange
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= pGb18030Ranges;
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sal_uInt32 nFirstNonRange = 0;
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for (;;)
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{
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if (pRange->m_nNonRangeDataIndex == -1)
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goto bad_input;
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else if (nCode < pRange->m_nFirstLinear)
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{
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++
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= pGb18030Data[
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pRange->m_nNonRangeDataIndex
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+ (nCode - nFirstNonRange)];
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else
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goto no_output;
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break;
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}
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else if (nCode < pRange->m_nPastLinear)
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{
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if (pDestBufPtr != pDestBufEnd)
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*pDestBufPtr++
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= (sal_Unicode)
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(pRange->m_nFirstUnicode
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+ (nCode
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- pRange->
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m_nFirstLinear));
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else
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goto no_output;
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break;
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}
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nFirstNonRange = (pRange++)->m_nPastLinear;
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}
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}
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eState = IMPL_GB_18030_TO_UNICODE_STATE_0;
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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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}
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continue;
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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_GB_18030_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_GB_18030_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_GB_18030_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_GB_18030_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< ImplGb18030ToUnicodeContext * >(pContext)->m_eState = eState;
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static_cast< ImplGb18030ToUnicodeContext * >(pContext)->m_nCode = nCode;
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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 ImplConvertUnicodeToGb18030(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_uInt32 const * pGb18030Data
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= static_cast< ImplGb18030ConverterData const * >(pData)->
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m_pUnicodeToGb18030Data;
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ImplUnicodeToGb180302000Range const * pGb18030Ranges
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= static_cast< ImplGb18030ConverterData const * >(pData)->
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m_pUnicodeToGb18030Ranges;
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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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= ((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 if (nChar < 0x10000)
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{
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ImplUnicodeToGb180302000Range const * pRange = pGb18030Ranges;
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sal_Unicode nFirstNonRange = 0x80;
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for (;;)
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{
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if (nChar < pRange->m_nFirstUnicode)
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{
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sal_uInt32 nCode
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= pGb18030Data[pRange->m_nNonRangeDataIndex
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+ (nChar - nFirstNonRange)];
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if (pDestBufEnd - pDestBufPtr
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>= (nCode <= 0xFFFF ? 2 : 4))
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{
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if (nCode > 0xFFFF)
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{
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*pDestBufPtr++ = static_cast< char >(nCode >> 24);
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*pDestBufPtr++ = static_cast< char >(nCode >> 16 & 0xFF);
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}
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*pDestBufPtr++ = static_cast< char >(nCode >> 8 & 0xFF);
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*pDestBufPtr++ = static_cast< char >(nCode & 0xFF);
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}
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else
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goto no_output;
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break;
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}
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else if (nChar <= pRange->m_nLastUnicode)
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{
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if (pDestBufEnd - pDestBufPtr >= 4)
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{
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sal_uInt32 nCode
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= pRange->m_nFirstLinear
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+ (nChar - pRange->m_nFirstUnicode);
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*pDestBufPtr++ = static_cast< char >(nCode / 12600 + 0x81);
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*pDestBufPtr++
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= static_cast< char >(nCode / 1260 % 10 + 0x30);
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*pDestBufPtr++ = static_cast< char >(nCode / 10 % 126 + 0x81);
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*pDestBufPtr++ = static_cast< char >(nCode % 10 + 0x30);
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}
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else
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goto no_output;
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break;
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}
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nFirstNonRange
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= (sal_Unicode) ((pRange++)->m_nLastUnicode + 1);
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}
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}
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else
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if (pDestBufEnd - pDestBufPtr >= 4)
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{
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sal_uInt32 nCode = nChar - 0x10000;
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*pDestBufPtr++ = static_cast< char >(nCode / 12600 + 0x90);
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*pDestBufPtr++ = static_cast< char >(nCode / 1260 % 10 + 0x30);
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*pDestBufPtr++ = static_cast< char >(nCode / 10 % 126 + 0x81);
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*pDestBufPtr++ = static_cast< char >(nCode % 10 + 0x30);
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}
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else
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goto no_output;
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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, NULL, 0, NULL))
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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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NULL, 0, NULL))
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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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((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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