48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/fuzz/pseudo_random_generator.h"
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#include <cassert>
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namespace spvtools {
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namespace fuzz {
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PseudoRandomGenerator::PseudoRandomGenerator(uint32_t seed) : mt_(seed) {}
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PseudoRandomGenerator::~PseudoRandomGenerator() = default;
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uint32_t PseudoRandomGenerator::RandomUint32(uint32_t bound) {
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assert(bound > 0 && "Bound must be positive");
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return static_cast<uint32_t>(
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std::uniform_int_distribution<>(0, bound - 1)(mt_));
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}
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bool PseudoRandomGenerator::RandomBool() {
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return static_cast<bool>(std::uniform_int_distribution<>(0, 1)(mt_));
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}
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uint32_t PseudoRandomGenerator::RandomPercentage() {
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// We use 101 because we want a result in the closed interval [0, 100], and
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// RandomUint32 is not inclusive of its bound.
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return RandomUint32(101);
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}
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double PseudoRandomGenerator::RandomDouble() {
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return std::uniform_real_distribution<double>(0.0, 1.0)(mt_);
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}
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} // namespace fuzz
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} // namespace spvtools
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