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/*************************************************************************/
/* Copyright (c) 2015 dx, http://kaimi.ru */
/* */
/* Permission is hereby granted, free of charge, to any person */
/* obtaining a copy of this software and associated documentation */
/* files (the "Software"), to deal in the Software without */
/* restriction, including without limitation the rights to use, */
/* copy, modify, merge, publish, distribute, sublicense, and/or */
/* sell copies of the Software, and to permit persons to whom the */
/* Software is furnished to do so, subject to the following conditions: */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#pragma once
#include <istream>
#include "pe_base.h"
namespace pe_bliss
{
class entropy_calculator
{
public:
//Calculates entropy for PE image section
static double calculate_entropy(const section& s);
//Calculates entropy for istream (from current position of stream)
static double calculate_entropy(std::istream& file);
//Calculates entropy for data block
static double calculate_entropy(const char* data, size_t length);
//Calculates entropy for this PE file (only section data)
static double calculate_entropy(const pe_base& pe);
private:
entropy_calculator();
entropy_calculator(const entropy_calculator&);
entropy_calculator& operator=(const entropy_calculator&);
//Calculates entropy from bytes count
static double calculate_entropy(const uint32_t byte_count[256], std::streamoff total_length);
};
}
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