mirror of
https://github.com/classilla/tenfourfox.git
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116 lines
2.7 KiB
C++
116 lines
2.7 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 "nsUnicodeToUTF16.h"
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#include "mozilla/CheckedInt.h"
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#include <string.h>
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NS_IMETHODIMP nsUnicodeToUTF16BE::Convert(const char16_t * aSrc, int32_t * aSrcLength,
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char * aDest, int32_t * aDestLength)
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{
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int32_t srcInLen = *aSrcLength;
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int32_t destInLen = *aDestLength;
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int32_t srcOutLen = 0;
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int32_t destOutLen = 0;
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int32_t copyCharLen;
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char16_t *p = (char16_t*)aDest;
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// Handle BOM if necessary
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if (0!=mBOM) {
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if (destInLen < 2) {
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goto needmoreoutput;
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}
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*p++ = mBOM;
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mBOM = 0;
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destOutLen +=2;
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}
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// find out the length of copy
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copyCharLen = srcInLen;
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if (copyCharLen > (destInLen - destOutLen) / 2) {
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copyCharLen = (destInLen - destOutLen) / 2;
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}
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// copy the data by swaping
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CopyData((char*)p , aSrc, copyCharLen );
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srcOutLen += copyCharLen;
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destOutLen += copyCharLen * 2;
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if (copyCharLen < srcInLen) {
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goto needmoreoutput;
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}
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*aSrcLength = srcOutLen;
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*aDestLength = destOutLen;
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return NS_OK;
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needmoreoutput:
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*aSrcLength = srcOutLen;
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*aDestLength = destOutLen;
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return NS_OK_UENC_MOREOUTPUT;
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}
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NS_IMETHODIMP nsUnicodeToUTF16BE::GetMaxLength(const char16_t * aSrc, int32_t aSrcLength,
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int32_t * aDestLength)
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{
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mozilla::CheckedInt32 length = aSrcLength;
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if (0 != mBOM) {
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length += 1;
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}
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length *= 2;
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if (!length.isValid()) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aDestLength = length.value();
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return NS_OK_UENC_EXACTLENGTH;
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}
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NS_IMETHODIMP nsUnicodeToUTF16BE::Finish(char * aDest, int32_t * aDestLength)
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{
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if (0 != mBOM) {
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if (*aDestLength >= 2) {
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*((char16_t*)aDest)= mBOM;
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mBOM=0;
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*aDestLength = 2;
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return NS_OK;
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} else {
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*aDestLength = 0;
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return NS_OK; // xxx should be error
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}
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} else {
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*aDestLength = 0;
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return NS_OK;
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}
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}
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NS_IMETHODIMP nsUnicodeToUTF16BE::Reset()
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{
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mBOM = 0;
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToUTF16BE::SetOutputErrorBehavior(int32_t aBehavior,
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nsIUnicharEncoder * aEncoder, char16_t aChar)
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{
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToUTF16BE::CopyData(char* aDest, const char16_t* aSrc, int32_t aLen )
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{
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mozilla::NativeEndian::copyAndSwapToBigEndian(aDest, aSrc, aLen);
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToUTF16LE::CopyData(char* aDest, const char16_t* aSrc, int32_t aLen )
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{
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mozilla::NativeEndian::copyAndSwapToLittleEndian(aDest, aSrc, aLen);
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return NS_OK;
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}
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