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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TOOLS_IPC_FUZZER_MUTATE_RAND_UTIL_H_
#define TOOLS_IPC_FUZZER_MUTATE_RAND_UTIL_H_
#include <stddef.h>
#include <stdint.h>
#include "third_party/mt19937ar/mt19937ar.h"
namespace ipc_fuzzer {
extern MersenneTwister* g_mersenne_twister;
void InitRand();
inline uint32_t RandU32() {
return g_mersenne_twister->genrand_int32();
}
inline uint64_t RandU64() {
return (static_cast<uint64_t>(RandU32()) << 32) | RandU32();
}
inline double RandDouble() {
uint64_t rand_u64 = RandU64();
return *reinterpret_cast<double*>(&rand_u64);
}
inline uint32_t RandInRange(uint32_t range) {
return RandU32() % range;
}
inline bool RandEvent(uint32_t frequency) {
return RandInRange(frequency) == 0;
}
inline size_t RandElementCount() {
return RandU32() % 10;
}
} // namespace ipc_fuzzer
#endif // TOOLS_IPC_FUZZER_MUTATE_RAND_UTIL_H_
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