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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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121
intl/uconv/util/nsUnicodeEncodeHelper.cpp Normal file
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "unicpriv.h"
#include "nsUnicodeEncodeHelper.h"
#include "nsDebug.h"
//----------------------------------------------------------------------
// Class nsUnicodeEncodeHelper [implementation]
nsresult nsUnicodeEncodeHelper::ConvertByTable(
const char16_t * aSrc,
int32_t * aSrcLength,
char * aDest,
int32_t * aDestLength,
uScanClassID aScanClass,
uShiftOutTable * aShiftOutTable,
uMappingTable * aMappingTable)
{
const char16_t * src = aSrc;
const char16_t * srcEnd = aSrc + *aSrcLength;
char * dest = aDest;
int32_t destLen = *aDestLength;
char16_t med;
int32_t bcw; // byte count for write;
nsresult res = NS_OK;
while (src < srcEnd) {
if (!uMapCode((uTable*) aMappingTable, static_cast<char16_t>(*(src++)), reinterpret_cast<uint16_t*>(&med))) {
if (aScanClass == u1ByteCharset && *(src - 1) < 0x20) {
// some tables are missing the 0x00 - 0x20 part
med = *(src - 1);
} else {
res = NS_ERROR_UENC_NOMAPPING;
break;
}
}
bool charFound;
if (aScanClass == uMultibytesCharset) {
NS_ASSERTION(aShiftOutTable, "shift table missing");
charFound = uGenerateShift(aShiftOutTable, 0, med,
(uint8_t *)dest, destLen,
(uint32_t *)&bcw);
} else {
charFound = uGenerate(aScanClass, 0, med,
(uint8_t *)dest, destLen,
(uint32_t *)&bcw);
}
if (!charFound) {
src--;
res = NS_OK_UENC_MOREOUTPUT;
break;
}
dest += bcw;
destLen -= bcw;
}
*aSrcLength = src - aSrc;
*aDestLength = dest - aDest;
return res;
}
nsresult nsUnicodeEncodeHelper::ConvertByMultiTable(
const char16_t * aSrc,
int32_t * aSrcLength,
char * aDest,
int32_t * aDestLength,
int32_t aTableCount,
uScanClassID * aScanClassArray,
uShiftOutTable ** aShiftOutTable,
uMappingTable ** aMappingTable)
{
const char16_t * src = aSrc;
const char16_t * srcEnd = aSrc + *aSrcLength;
char * dest = aDest;
int32_t destLen = *aDestLength;
char16_t med;
int32_t bcw; // byte count for write;
nsresult res = NS_OK;
int32_t i;
while (src < srcEnd) {
for (i=0; i<aTableCount; i++)
if (uMapCode((uTable*) aMappingTable[i], static_cast<uint16_t>(*src), reinterpret_cast<uint16_t*>(&med))) break;
src++;
if (i == aTableCount) {
res = NS_ERROR_UENC_NOMAPPING;
break;
}
bool charFound;
if (aScanClassArray[i] == uMultibytesCharset) {
NS_ASSERTION(aShiftOutTable[i], "shift table missing");
charFound = uGenerateShift(aShiftOutTable[i], 0, med,
(uint8_t *)dest, destLen,
(uint32_t *)&bcw);
}
else
charFound = uGenerate(aScanClassArray[i], 0, med,
(uint8_t *)dest, destLen,
(uint32_t *)&bcw);
if (!charFound) {
src--;
res = NS_OK_UENC_MOREOUTPUT;
break;
}
dest += bcw;
destLen -= bcw;
}
*aSrcLength = src - aSrc;
*aDestLength = dest - aDest;
return res;
}