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// Copyright 2021 The Tint Authors.
//
// 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.
#include "fuzzers/tint_ast_fuzzer/probability_context.h"
#include <cassert>
namespace tint {
namespace fuzzers {
namespace ast_fuzzer {
namespace {
const std::pair<uint32_t, uint32_t> kChanceOfReplacingIdentifiers = {30, 70};
} // namespace
ProbabilityContext::ProbabilityContext(RandomGenerator* generator)
: generator_(generator),
chance_of_replacing_identifiers_(
RandomFromRange(kChanceOfReplacingIdentifiers)) {
assert(generator != nullptr && "generator must not be nullptr");
}
uint32_t ProbabilityContext::RandomFromRange(
std::pair<uint32_t, uint32_t> range) {
assert(range.first <= range.second && "Range must be non-decreasing");
return generator_->GetUInt32(
range.first, range.second + 1); // + 1 need since range is inclusive.
}
} // namespace ast_fuzzer
} // namespace fuzzers
} // namespace tint