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Memory.hpp
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Memory.hpp
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/* MCM file compressor
Copyright (C) 2013, Google Inc.
Authors: Mathieu Chartier
LICENSE
This file is part of the MCM file compressor.
MCM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MCM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MEMORY_HPP_
#define _MEMORY_HPP_
#include "Util.hpp"
class MemMap {
void* storage;
size_t size;
public:
inline size_t getSize() const {
return size;
}
void resize(size_t bytes);
void release();
void zero();
inline const void* getData() const {
return storage;
}
inline void* getData() {
return storage;
}
MemMap();
virtual ~MemMap();
};
template <typename T, bool kBigEndian>
T readBytes(uint8_t* ptr, size_t bytes) {
T acc = 0;
if (!kBigEndian) {
ptr += bytes;
}
for (size_t i = 0; i < bytes; ++i) {
acc = (acc << 8) | (kBigEndian ? *ptr++ : *--ptr);
}
return acc;
}
template <typename T, bool kBigEndian>
void writeBytes(uint8_t* ptr, size_t bytes, T value) {
T acc = 0;
if (kBigEndian) {
ptr += bytes;
}
for (size_t i = 0; i < bytes; ++i) {
*(kBigEndian ? --ptr : ptr++) = value;
value >>= 8;
}
}
#endif