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/*
* Copyright (C) 2005-2017 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/text/LineEnding.h>
#include <wtf/Vector.h>
namespace WTF {
Vector<uint8_t> normalizeLineEndingsToLF(Vector<uint8_t>&& vector)
{
size_t inputIndex = 0;
size_t outputIndex = 0;
while (inputIndex < vector.size()) {
auto character = vector[inputIndex++];
if (character == '\r') {
// Turn CRLF and CR into LF.
if (inputIndex < vector.size() && vector[inputIndex] == '\n')
++inputIndex;
vector[outputIndex++] = '\n';
} else {
// Leave other characters alone.
vector[outputIndex++] = character;
}
}
vector.shrink(outputIndex);
return vector;
}
Vector<uint8_t> normalizeLineEndingsToCRLF(Vector<uint8_t>&& source)
{
size_t sourceIndex = 0;
size_t resultLength = 0;
while (sourceIndex < source.size()) {
auto character = source[sourceIndex++];
if (character == '\r') {
// Turn CR or CRLF into CRLF;
if (sourceIndex < source.size() && source[sourceIndex] == '\n')
++sourceIndex;
resultLength += 2;
} else if (character == '\n') {
// Turn LF into CRLF.
resultLength += 2;
} else {
// Leave other characters alone.
resultLength += 1;
}
}
if (resultLength == source.size())
return source;
Vector<uint8_t> result(resultLength);
sourceIndex = 0;
size_t resultIndex = 0;
while (sourceIndex < source.size()) {
auto character = source[sourceIndex++];
if (character == '\r') {
// Turn CR or CRLF into CRLF;
if (sourceIndex < source.size() && source[sourceIndex] == '\n')
++sourceIndex;
result[resultIndex++] = '\r';
result[resultIndex++] = '\n';
} else if (character == '\n') {
// Turn LF into CRLF.
result[resultIndex++] = '\r';
result[resultIndex++] = '\n';
} else {
// Leave other characters alone.
result[resultIndex++] = character;
}
}
ASSERT(resultIndex == resultLength);
return result;
}
Vector<uint8_t> normalizeLineEndingsToNative(Vector<uint8_t>&& from)
{
#if OS(WINDOWS)
return normalizeLineEndingsToCRLF(WTFMove(from));
#else
return normalizeLineEndingsToLF(WTFMove(from));
#endif
}
} // namespace WTF
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