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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.
*/
#pragma once
#include <vector>
#include <string>
#include <assert.h>
class DataStream
{
public:
DataStream();
DataStream(void* data, int sizeInBytes);
DataStream(const char* filename);
static bool fileExists(const char* filename);
void saveToFile(const char* filename);
template<typename T>
void write(T& value)
{
if(mBuffer.size() < mWritePos + sizeof(T))
mBuffer.resize(mWritePos + sizeof(T));
memcpy(&mBuffer[mWritePos], &value, sizeof(T));
mWritePos += sizeof(T);
}
template<>
void write<std::string>(std::string& value)
{
int len = (int)value.length();
if(mBuffer.size() < mWritePos + len + sizeof(int))
mBuffer.resize(mWritePos + len + sizeof(int));
memcpy(&mBuffer[mWritePos], &len, sizeof(int));
mWritePos += sizeof(int);
memcpy(&mBuffer[mWritePos], value.c_str(), len);
mWritePos += len;
}
void write(void* data, int sizeInBytes);
template<typename T>
T read()
{
T value;
assert(mReadPos + sizeof(T) <= mBuffer.size());
memcpy(&value, &mBuffer[mReadPos], sizeof(T));
mReadPos += sizeof(T);
return value;
}
template<>
std::string read<std::string>()
{
int len = read<int>();
std::string value;
value.resize(len);
assert(mReadPos + len < (int)mBuffer.size());
memcpy(&value[0], &mBuffer[mReadPos], len);
mReadPos += len;
return value;
}
private:
std::vector<unsigned char> mBuffer;
int mReadPos;
int mWritePos;
};
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