зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.9 KiB
C++
123 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#include "pratom.h"
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#include "unicpriv.h"
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#include "nsIUnicodeEncoder.h"
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#include "nsUnicodeEncodeHelper.h"
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//----------------------------------------------------------------------
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// Class nsUnicodeEncodeHelper [implementation]
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nsresult nsUnicodeEncodeHelper::ConvertByTable(
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const PRUnichar * aSrc,
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int32_t * aSrcLength,
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char * aDest,
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int32_t * aDestLength,
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uScanClassID aScanClass,
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uShiftOutTable * aShiftOutTable,
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uMappingTable * aMappingTable)
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{
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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int32_t destLen = *aDestLength;
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PRUnichar med;
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int32_t bcw; // byte count for write;
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nsresult res = NS_OK;
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while (src < srcEnd) {
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if (!uMapCode((uTable*) aMappingTable, static_cast<PRUnichar>(*(src++)), reinterpret_cast<uint16_t*>(&med))) {
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if (aScanClass == u1ByteCharset && *(src - 1) < 0x20) {
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// some tables are missing the 0x00 - 0x20 part
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med = *(src - 1);
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} else {
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res = NS_ERROR_UENC_NOMAPPING;
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break;
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}
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}
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bool charFound;
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if (aScanClass == uMultibytesCharset) {
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NS_ASSERTION(aShiftOutTable, "shift table missing");
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charFound = uGenerateShift(aShiftOutTable, 0, med,
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(uint8_t *)dest, destLen,
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(uint32_t *)&bcw);
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} else {
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charFound = uGenerate(aScanClass, 0, med,
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(uint8_t *)dest, destLen,
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(uint32_t *)&bcw);
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}
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if (!charFound) {
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src--;
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res = NS_OK_UENC_MOREOUTPUT;
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break;
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}
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dest += bcw;
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destLen -= bcw;
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}
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return res;
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}
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nsresult nsUnicodeEncodeHelper::ConvertByMultiTable(
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const PRUnichar * aSrc,
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int32_t * aSrcLength,
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char * aDest,
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int32_t * aDestLength,
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int32_t aTableCount,
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uScanClassID * aScanClassArray,
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uShiftOutTable ** aShiftOutTable,
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uMappingTable ** aMappingTable)
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{
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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int32_t destLen = *aDestLength;
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PRUnichar med;
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int32_t bcw; // byte count for write;
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nsresult res = NS_OK;
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int32_t i;
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while (src < srcEnd) {
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for (i=0; i<aTableCount; i++)
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if (uMapCode((uTable*) aMappingTable[i], static_cast<uint16_t>(*src), reinterpret_cast<uint16_t*>(&med))) break;
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src++;
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if (i == aTableCount) {
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res = NS_ERROR_UENC_NOMAPPING;
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break;
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}
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bool charFound;
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if (aScanClassArray[i] == uMultibytesCharset) {
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NS_ASSERTION(aShiftOutTable[i], "shift table missing");
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charFound = uGenerateShift(aShiftOutTable[i], 0, med,
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(uint8_t *)dest, destLen,
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(uint32_t *)&bcw);
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}
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else
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charFound = uGenerate(aScanClassArray[i], 0, med,
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(uint8_t *)dest, destLen,
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(uint32_t *)&bcw);
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if (!charFound) {
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src--;
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res = NS_OK_UENC_MOREOUTPUT;
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break;
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}
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dest += bcw;
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destLen -= bcw;
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}
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return res;
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}
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