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|
/* -*- 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(!ImplIsHighSurrogate(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(!ImplIsHighSurrogate(nUnicode));
}
if (nUnicode == 0xFFFF)
goto bad_input;
if (ImplIsHighSurrogate(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 (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
{
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: */
|
