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//
// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "common/MemoryBuffer.h"
#include <algorithm>
#include <cstdlib>
#include "common/debug.h"
namespace rx
{
MemoryBuffer::MemoryBuffer()
: mSize(0),
mData(NULL)
{
}
MemoryBuffer::~MemoryBuffer()
{
free(mData);
mData = NULL;
}
bool MemoryBuffer::resize(size_t size)
{
if (size == 0)
{
free(mData);
mData = NULL;
mSize = 0;
return true;
}
if (size == mSize)
{
return true;
}
// Only reallocate if the size has changed.
uint8_t *newMemory = reinterpret_cast<uint8_t*>(malloc(sizeof(uint8_t) * size));
if (newMemory == NULL)
{
return false;
}
if (mData)
{
// Copy the intersection of the old data and the new data
std::copy(mData, mData + std::min(mSize, size), newMemory);
free(mData);
}
mData = newMemory;
mSize = size;
return true;
}
size_t MemoryBuffer::size() const
{
return mSize;
}
const uint8_t *MemoryBuffer::data() const
{
return mData;
}
uint8_t *MemoryBuffer::data()
{
ASSERT(mData);
return mData;
}
}
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