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/*
* Copyright (c) 2008-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#include "DataStream.h"
#include <fstream>
DataStream::DataStream()
:
mReadPos(0),
mWritePos(0)
{
}
DataStream::DataStream(void* data, int sizeInBytes)
:
mReadPos(0),
mWritePos(0)
{
write(data, sizeInBytes);
}
DataStream::DataStream(const char* filename)
:
mReadPos(0),
mWritePos(0)
{
std::ifstream file;
file.open(filename,std::ifstream::binary | std::ios::ate);
assert(file.good());
std::streamsize size = file.tellg();
mBuffer.resize(size);
file.seekg(0, std::ios::beg);
file.read(reinterpret_cast<char*>(mBuffer.data()), size);
mWritePos = size;
file.close();
}
bool DataStream::fileExists(const char* filename)
{
std::ifstream file;
file.open(filename, std::ifstream::binary | std::ios::ate);
return file.good();
}
void DataStream::saveToFile(const char* filename)
{
std::ofstream file(filename, std::fstream::binary | std::fstream::trunc);
file.write(reinterpret_cast<char*>(mBuffer.data()), mBuffer.size());
file.flush();
file.close();
}
void DataStream::write(void* data, int sizeInBytes)
{
if((int)mBuffer.size() < mWritePos + sizeInBytes)
mBuffer.resize(mWritePos + sizeInBytes);
memcpy(&mBuffer[mWritePos], data, sizeInBytes);
mWritePos += sizeInBytes;
}
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