SPIRV-Tools/source/fuzz/pseudo_random_generator.h
Stefano Milizia 8d49fb2f4d
spirv-fuzz: Improvements to random number generation (#3809)
This PR extends the RandomGenerator interface and fixes the
PseudoRandomGenerator class. It:

- Fixes a problem that made the RandomUint32 of PseudoRandomGenerator
  segfault.
- Adds the RandomUint64 function to RandomGenerator and
  PseudoRandomGenerator.

Fixes #3805.
2020-09-16 15:45:05 +01:00

50 lines
1.3 KiB
C++

// Copyright (c) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_FUZZ_PSEUDO_RANDOM_GENERATOR_H_
#define SOURCE_FUZZ_PSEUDO_RANDOM_GENERATOR_H_
#include <random>
#include "source/fuzz/random_generator.h"
namespace spvtools {
namespace fuzz {
// Generates random data from a pseudo-random number generator.
class PseudoRandomGenerator : public RandomGenerator {
public:
explicit PseudoRandomGenerator(uint32_t seed);
~PseudoRandomGenerator() override;
uint32_t RandomUint32(uint32_t bound) override;
uint64_t RandomUint64(uint64_t bound) override;
uint32_t RandomPercentage() override;
bool RandomBool() override;
double RandomDouble() override;
private:
std::mt19937 mt_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_PSEUDO_RANDOM_GENERATOR_H_