llvm-project/llvm/lib/Fuzzer/FuzzerRandom.h

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//===- FuzzerRandom.h - Internal header for the Fuzzer ----------*- C++ -* ===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// fuzzer::Random
//===----------------------------------------------------------------------===//
#ifndef LLVM_FUZZER_RANDOM_H
#define LLVM_FUZZER_RANDOM_H
#include <random>
namespace fuzzer {
class Random {
public:
Random(unsigned int seed) : R(seed) {}
size_t Rand() { return R(); }
size_t RandBool() { return Rand() % 2; }
size_t operator()(size_t n) { return n ? Rand() % n : 0; }
std::mt19937 &Get_mt19937() { return R; }
private:
std::mt19937 R;
};
} // namespace fuzzer
#endif // LLVM_FUZZER_RANDOM_H