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|
/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
#include "tenchelp.h"
#include "unichars.h"
#include "rtl/textcvt.h"
/* ======================================================================= */
/* DBCS to Unicode conversion routine use a lead table for the first byte, */
/* where we determine the trail table or for single byte chars the unicode */
/* value. We have for all lead byte a separate table, because we can */
/* then share many tables for diffrent charset encodings. */
/* ======================================================================= */
sal_Size ImplDBCSToUnicode( const ImplTextConverterData* pData, void* pContext,
const sal_Char* pSrcBuf, sal_Size nSrcBytes,
sal_Unicode* pDestBuf, sal_Size nDestChars,
sal_uInt32 nFlags, sal_uInt32* pInfo,
sal_Size* pSrcCvtBytes )
{
sal_uChar cLead;
sal_uChar cTrail;
sal_Unicode cConv;
const ImplDBCSToUniLeadTab* pLeadEntry;
const ImplDBCSConvertData* pConvertData = (const ImplDBCSConvertData*)pData;
const ImplDBCSToUniLeadTab* pLeadTab = pConvertData->mpToUniLeadTab;
sal_Unicode* pEndDestBuf;
const sal_Char* pEndSrcBuf;
(void) pContext; /* unused */
*pInfo = 0;
pEndDestBuf = pDestBuf+nDestChars;
pEndSrcBuf = pSrcBuf+nSrcBytes;
while ( pSrcBuf < pEndSrcBuf )
{
cLead = (sal_uChar)*pSrcBuf;
/* get entry for the lead byte */
pLeadEntry = pLeadTab+cLead;
/* SingleByte char? */
if (pLeadEntry->mpToUniTrailTab == NULL
|| cLead < pConvertData->mnLeadStart
|| cLead > pConvertData->mnLeadEnd)
{
cConv = pLeadEntry->mnUniChar;
if ( !cConv && (cLead != 0) )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_UNDEFINED;
if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
break;
}
else if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_IGNORE )
{
pSrcBuf++;
continue;
}
else
cConv = ImplGetUndefinedUnicodeChar(cLead, nFlags);
}
}
else
{
/* Source buffer to small */
if ( pSrcBuf +1 == pEndSrcBuf )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
break;
}
pSrcBuf++;
cTrail = (sal_uChar)*pSrcBuf;
if ( (cTrail >= pLeadEntry->mnTrailStart) && (cTrail <= pLeadEntry->mnTrailEnd) )
cConv = pLeadEntry->mpToUniTrailTab[cTrail-pLeadEntry->mnTrailStart];
else
cConv = 0;
if ( !cConv )
{
/* EUDC Ranges */
sal_uInt16 i;
const ImplDBCSEUDCData* pEUDCTab = pConvertData->mpEUDCTab;
for ( i = 0; i < pConvertData->mnEUDCCount; i++ )
{
if ( (cLead >= pEUDCTab->mnLeadStart) &&
(cLead <= pEUDCTab->mnLeadEnd) )
{
sal_uInt16 nTrailCount = 0;
if ( (cTrail >= pEUDCTab->mnTrail1Start) &&
(cTrail <= pEUDCTab->mnTrail1End) )
{
cConv = pEUDCTab->mnUniStart+
((cLead-pEUDCTab->mnLeadStart)*pEUDCTab->mnTrailRangeCount)+
(cTrail-pEUDCTab->mnTrail1Start);
break;
}
else
{
nTrailCount = pEUDCTab->mnTrail1End-pEUDCTab->mnTrail1Start+1;
if ( (pEUDCTab->mnTrailCount >= 2) &&
(cTrail >= pEUDCTab->mnTrail2Start) &&
(cTrail <= pEUDCTab->mnTrail2End) )
{
cConv = pEUDCTab->mnUniStart+
((cLead-pEUDCTab->mnLeadStart)*pEUDCTab->mnTrailRangeCount)+
nTrailCount+
(cTrail-pEUDCTab->mnTrail2Start);
break;
}
else
{
nTrailCount = pEUDCTab->mnTrail2End-pEUDCTab->mnTrail2Start+1;
if ( (pEUDCTab->mnTrailCount >= 3) &&
(cTrail >= pEUDCTab->mnTrail3Start) &&
(cTrail <= pEUDCTab->mnTrail3End) )
{
cConv = pEUDCTab->mnUniStart+
((cLead-pEUDCTab->mnLeadStart)*pEUDCTab->mnTrailRangeCount)+
nTrailCount+
(cTrail-pEUDCTab->mnTrail3Start);
break;
}
}
}
}
pEUDCTab++;
}
if ( !cConv )
{
/* Wir vergleichen den kompletten Trailbereich den wir */
/* definieren, der normalerweise groesser sein kann als */
/* der definierte. Dies machen wir, damit Erweiterungen von */
/* uns nicht beruecksichtigten Encodings so weit wie */
/* moeglich auch richtig zu behandeln, das double byte */
/* characters auch als ein einzelner Character behandelt */
/* wird. */
if (cLead < pConvertData->mnLeadStart
|| cLead > pConvertData->mnLeadEnd
|| cTrail < pConvertData->mnTrailStart
|| cTrail > pConvertData->mnTrailEnd)
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_INVALID;
if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
break;
}
else if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE )
{
pSrcBuf++;
continue;
}
else
cConv = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
}
else
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_MBUNDEFINED;
if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
break;
}
else if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_IGNORE )
{
pSrcBuf++;
continue;
}
else
cConv = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
}
}
}
}
if ( pDestBuf == pEndDestBuf )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = cConv;
pDestBuf++;
pSrcBuf++;
}
*pSrcCvtBytes = nSrcBytes - (pEndSrcBuf-pSrcBuf);
return (nDestChars - (pEndDestBuf-pDestBuf));
}
/* ----------------------------------------------------------------------- */
sal_Size ImplUnicodeToDBCS( const ImplTextConverterData* pData, void* pContext,
const sal_Unicode* pSrcBuf, sal_Size nSrcChars,
sal_Char* pDestBuf, sal_Size nDestBytes,
sal_uInt32 nFlags, sal_uInt32* pInfo,
sal_Size* pSrcCvtChars )
{
sal_uInt16 cConv;
sal_Unicode c;
sal_uChar nHighChar;
sal_uChar nLowChar;
const ImplUniToDBCSHighTab* pHighEntry;
const ImplDBCSConvertData* pConvertData = (const ImplDBCSConvertData*)pData;
const ImplUniToDBCSHighTab* pHighTab = pConvertData->mpToDBCSHighTab;
sal_Char* pEndDestBuf;
const sal_Unicode* pEndSrcBuf;
sal_Bool bCheckRange = (pConvertData->mnLeadStart != 0
|| pConvertData->mnLeadEnd != 0xFF);
/* this statement has the effect that this extra check is only done for
EUC-KR, which uses the MS-949 tables, but does not support the full
range of MS-949 */
(void) pContext; /* unused */
*pInfo = 0;
pEndDestBuf = pDestBuf+nDestBytes;
pEndSrcBuf = pSrcBuf+nSrcChars;
while ( pSrcBuf < pEndSrcBuf )
{
c = *pSrcBuf;
nHighChar = (sal_uChar)((c >> 8) & 0xFF);
nLowChar = (sal_uChar)(c & 0xFF);
/* get entry for the high byte */
pHighEntry = pHighTab+nHighChar;
/* is low byte in the table range */
if ( (nLowChar >= pHighEntry->mnLowStart) && (nLowChar <= pHighEntry->mnLowEnd) )
{
cConv = pHighEntry->mpToUniTrailTab[nLowChar-pHighEntry->mnLowStart];
if (bCheckRange && cConv > 0x7F
&& ((cConv >> 8) < pConvertData->mnLeadStart
|| (cConv >> 8) > pConvertData->mnLeadEnd
|| (cConv & 0xFF) < pConvertData->mnTrailStart
|| (cConv & 0xFF) > pConvertData->mnTrailEnd))
cConv = 0;
}
else
cConv = 0;
if (cConv == 0 && c != 0)
{
/* Map to EUDC ranges: */
ImplDBCSEUDCData const * pEUDCTab = pConvertData->mpEUDCTab;
sal_uInt32 i;
for (i = 0; i < pConvertData->mnEUDCCount; ++i)
{
if (c >= pEUDCTab->mnUniStart && c <= pEUDCTab->mnUniEnd)
{
sal_uInt32 nIndex = c - pEUDCTab->mnUniStart;
sal_uInt32 nLeadOff
= nIndex / pEUDCTab->mnTrailRangeCount;
sal_uInt32 nTrailOff
= nIndex % pEUDCTab->mnTrailRangeCount;
sal_uInt32 nSize;
cConv = (sal_uInt16)
((pEUDCTab->mnLeadStart + nLeadOff) << 8);
nSize
= pEUDCTab->mnTrail1End - pEUDCTab->mnTrail1Start + 1;
if (nTrailOff < nSize)
{
cConv |= pEUDCTab->mnTrail1Start + nTrailOff;
break;
}
nTrailOff -= nSize;
nSize
= pEUDCTab->mnTrail2End - pEUDCTab->mnTrail2Start + 1;
if (nTrailOff < nSize)
{
cConv |= pEUDCTab->mnTrail2Start + nTrailOff;
break;
}
nTrailOff -= nSize;
cConv |= pEUDCTab->mnTrail3Start + nTrailOff;
break;
}
pEUDCTab++;
}
/* FIXME
* SB: Not sure why this is in here. Plus, it does not work as
* intended when (c & 0xFF) == 0, because the next !cConv check
* will then think c has not yet been converted...
*/
if (c >= RTL_TEXTCVT_BYTE_PRIVATE_START
&& c <= RTL_TEXTCVT_BYTE_PRIVATE_END)
{
if ( nFlags & RTL_UNICODETOTEXT_FLAGS_PRIVATE_MAPTO0 )
cConv = (sal_Char)(sal_uChar)(c & 0xFF);
}
}
if ( !cConv )
{
if ( nFlags & RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACE )
{
/* !!! */
}
if ( nFlags & RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACESTR )
{
/* !!! */
}
/* Handle undefined and surrogates characters */
/* (all surrogates characters are undefined) */
if (ImplHandleUndefinedUnicodeToTextChar(pData,
&pSrcBuf,
pEndSrcBuf,
&pDestBuf,
pEndDestBuf,
nFlags,
pInfo))
continue;
else
break;
}
/* SingleByte */
if ( !(cConv & 0xFF00) )
{
if ( pDestBuf == pEndDestBuf )
{
*pInfo |= RTL_UNICODETOTEXT_INFO_ERROR | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = (sal_Char)(sal_uChar)(cConv & 0xFF);
pDestBuf++;
}
else
{
if ( pDestBuf+1 >= pEndDestBuf )
{
*pInfo |= RTL_UNICODETOTEXT_INFO_ERROR | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = (sal_Char)(sal_uChar)((cConv >> 8) & 0xFF);
pDestBuf++;
*pDestBuf = (sal_Char)(sal_uChar)(cConv & 0xFF);
pDestBuf++;
}
pSrcBuf++;
}
*pSrcCvtChars = nSrcChars - (pEndSrcBuf-pSrcBuf);
return (nDestBytes - (pEndDestBuf-pDestBuf));
}
/* ======================================================================= */
#define JIS_EUC_LEAD_OFF 0x80
#define JIS_EUC_TRAIL_OFF 0x80
/* ----------------------------------------------------------------------- */
sal_Size ImplEUCJPToUnicode( const ImplTextConverterData* pData,
void* pContext,
const sal_Char* pSrcBuf, sal_Size nSrcBytes,
sal_Unicode* pDestBuf, sal_Size nDestChars,
sal_uInt32 nFlags, sal_uInt32* pInfo,
sal_Size* pSrcCvtBytes )
{
sal_uChar c;
sal_uChar cLead = '\0';
sal_uChar cTrail = '\0';
sal_Unicode cConv;
const ImplDBCSToUniLeadTab* pLeadEntry;
const ImplDBCSToUniLeadTab* pLeadTab;
const ImplEUCJPConvertData* pConvertData = (const ImplEUCJPConvertData*)pData;
sal_Unicode* pEndDestBuf;
const sal_Char* pEndSrcBuf;
(void) pContext; /* unused */
*pInfo = 0;
pEndDestBuf = pDestBuf+nDestChars;
pEndSrcBuf = pSrcBuf+nSrcBytes;
while ( pSrcBuf < pEndSrcBuf )
{
c = (sal_uChar)*pSrcBuf;
/* ASCII */
if ( c <= 0x7F )
cConv = c;
else
{
/* SS2 - Half-width katakana */
/* 8E + A1-DF */
if ( c == 0x8E )
{
/* Source buffer to small */
if ( pSrcBuf + 1 == pEndSrcBuf )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
break;
}
pSrcBuf++;
c = (sal_uChar)*pSrcBuf;
if ( (c >= 0xA1) && (c <= 0xDF) )
cConv = 0xFF61+(c-0xA1);
else
{
cConv = 0;
cLead = 0x8E;
cTrail = c;
}
}
else
{
/* SS3 - JIS 0212-1990 */
/* 8F + A1-FE + A1-FE */
if ( c == 0x8F )
{
/* Source buffer to small */
if (pEndSrcBuf - pSrcBuf < 3)
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
break;
}
pSrcBuf++;
cLead = (sal_uChar)*pSrcBuf;
pSrcBuf++;
cTrail = (sal_uChar)*pSrcBuf;
pLeadTab = pConvertData->mpJIS0212ToUniLeadTab;
}
/* CodeSet 2 JIS 0208-1997 */
/* A1-FE + A1-FE */
else
{
/* Source buffer to small */
if ( pSrcBuf + 1 == pEndSrcBuf )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL;
break;
}
cLead = c;
pSrcBuf++;
cTrail = (sal_uChar)*pSrcBuf;
pLeadTab = pConvertData->mpJIS0208ToUniLeadTab;
}
/* Undefined Range */
if ( (cLead < JIS_EUC_LEAD_OFF) || (cTrail < JIS_EUC_TRAIL_OFF) )
cConv = 0;
else
{
cLead -= JIS_EUC_LEAD_OFF;
cTrail -= JIS_EUC_TRAIL_OFF;
pLeadEntry = pLeadTab+cLead;
if ( (cTrail >= pLeadEntry->mnTrailStart) && (cTrail <= pLeadEntry->mnTrailEnd) )
cConv = pLeadEntry->mpToUniTrailTab[cTrail-pLeadEntry->mnTrailStart];
else
cConv = 0;
}
}
if ( !cConv )
{
/* Wir vergleichen den kompletten Trailbereich den wir */
/* definieren, der normalerweise groesser sein kann als */
/* der definierte. Dies machen wir, damit Erweiterungen von */
/* uns nicht beruecksichtigten Encodings so weit wie */
/* moeglich auch richtig zu behandeln, das double byte */
/* characters auch als ein einzelner Character behandelt */
/* wird. */
if ( (cLead < JIS_EUC_LEAD_OFF) || (cTrail < JIS_EUC_TRAIL_OFF) )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_INVALID;
if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
break;
}
else if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE )
{
pSrcBuf++;
continue;
}
else
cConv = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
}
else
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_MBUNDEFINED;
if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
break;
}
else if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK) == RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_IGNORE )
{
pSrcBuf++;
continue;
}
else
cConv = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
}
}
}
if ( pDestBuf == pEndDestBuf )
{
*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = cConv;
pDestBuf++;
pSrcBuf++;
}
*pSrcCvtBytes = nSrcBytes - (pEndSrcBuf-pSrcBuf);
return (nDestChars - (pEndDestBuf-pDestBuf));
}
/* ----------------------------------------------------------------------- */
sal_Size ImplUnicodeToEUCJP( const ImplTextConverterData* pData,
void* pContext,
const sal_Unicode* pSrcBuf, sal_Size nSrcChars,
sal_Char* pDestBuf, sal_Size nDestBytes,
sal_uInt32 nFlags, sal_uInt32* pInfo,
sal_Size* pSrcCvtChars )
{
sal_uInt32 cConv;
sal_Unicode c;
sal_uChar nHighChar;
sal_uChar nLowChar;
const ImplUniToDBCSHighTab* pHighEntry;
const ImplUniToDBCSHighTab* pHighTab;
const ImplEUCJPConvertData* pConvertData = (const ImplEUCJPConvertData*)pData;
sal_Char* pEndDestBuf;
const sal_Unicode* pEndSrcBuf;
(void) pContext; /* unused */
*pInfo = 0;
pEndDestBuf = pDestBuf+nDestBytes;
pEndSrcBuf = pSrcBuf+nSrcChars;
while ( pSrcBuf < pEndSrcBuf )
{
c = *pSrcBuf;
/* ASCII */
if ( c <= 0x7F )
cConv = c;
/* Half-width katakana */
else if ( (c >= 0xFF61) && (c <= 0xFF9F) )
cConv = 0x8E00+0xA1+(c-0xFF61);
else
{
nHighChar = (sal_uChar)((c >> 8) & 0xFF);
nLowChar = (sal_uChar)(c & 0xFF);
/* JIS 0208 */
pHighTab = pConvertData->mpUniToJIS0208HighTab;
pHighEntry = pHighTab+nHighChar;
if ( (nLowChar >= pHighEntry->mnLowStart) && (nLowChar <= pHighEntry->mnLowEnd) )
{
cConv = pHighEntry->mpToUniTrailTab[nLowChar-pHighEntry->mnLowStart];
if (cConv != 0)
cConv |= 0x8080;
}
else
cConv = 0;
/* JIS 0212 */
if ( !cConv )
{
pHighTab = pConvertData->mpUniToJIS0212HighTab;
pHighEntry = pHighTab+nHighChar;
if ( (nLowChar >= pHighEntry->mnLowStart) && (nLowChar <= pHighEntry->mnLowEnd) )
{
cConv = pHighEntry->mpToUniTrailTab[nLowChar-pHighEntry->mnLowStart];
if (cConv != 0)
cConv |= 0x8F8080;
}
if ( !cConv )
{
if ( nFlags & RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACE )
{
/* !!! */
}
if ( nFlags & RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACESTR )
{
/* !!! */
}
/* Handle undefined and surrogates characters */
/* (all surrogates characters are undefined) */
if (ImplHandleUndefinedUnicodeToTextChar(pData,
&pSrcBuf,
pEndSrcBuf,
&pDestBuf,
pEndDestBuf,
nFlags,
pInfo))
continue;
else
break;
}
}
}
/* SingleByte */
if ( !(cConv & 0xFFFF00) )
{
if ( pDestBuf == pEndDestBuf )
{
*pInfo |= RTL_UNICODETOTEXT_INFO_ERROR | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = (sal_Char)(sal_uChar)(cConv & 0xFF);
pDestBuf++;
}
/* DoubleByte */
else if ( !(cConv & 0xFF0000) )
{
if ( pDestBuf+1 >= pEndDestBuf )
{
*pInfo |= RTL_UNICODETOTEXT_INFO_ERROR | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = (sal_Char)(sal_uChar)((cConv >> 8) & 0xFF);
pDestBuf++;
*pDestBuf = (sal_Char)(sal_uChar)(cConv & 0xFF);
pDestBuf++;
}
else
{
if ( pDestBuf+2 >= pEndDestBuf )
{
*pInfo |= RTL_UNICODETOTEXT_INFO_ERROR | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
*pDestBuf = (sal_Char)(sal_uChar)((cConv >> 16) & 0xFF);
pDestBuf++;
*pDestBuf = (sal_Char)(sal_uChar)((cConv >> 8) & 0xFF);
pDestBuf++;
*pDestBuf = (sal_Char)(sal_uChar)(cConv & 0xFF);
pDestBuf++;
}
pSrcBuf++;
}
*pSrcCvtChars = nSrcChars - (pEndSrcBuf-pSrcBuf);
return (nDestBytes - (pEndDestBuf-pDestBuf));
}
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