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93 lines
3.2 KiB
93 lines
3.2 KiB
// Copyright 2023 The Centipede Authors.
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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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// https://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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#ifndef THIRD_PARTY_CENTIPEDE_RUNNER_FLAGS_H_
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#define THIRD_PARTY_CENTIPEDE_RUNNER_FLAGS_H_
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#include <cstddef>
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#include <string>
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#include <utility> // std::pair
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#include <vector>
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namespace fuzztest::internal {
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class RunnerFlags {
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public:
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// Takes a strings of colon-separated flags. Flags in the string are either
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// 1. <flag name> or
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// 2. <flag name>=<flag value>
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explicit RunnerFlags(const std::string& runner_flags_string);
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~RunnerFlags() = default;
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// By default copyable and movable.
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RunnerFlags(const RunnerFlags&) = default;
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RunnerFlags& operator=(const RunnerFlags&) = default;
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RunnerFlags(RunnerFlags&&) = default;
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RunnerFlags& operator=(RunnerFlags&&) = default;
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// Tells if 'flag' is in this.
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bool HasFlag(const std::string& flag) const {
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return IndexOfFlag(flag) != flags_.size();
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}
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// Gets value of 'flag'. Returns an empty string if 'flag' is not in this
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// or 'flag' has no value. If a flag is repeated, this returns
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// value of the last occurrence.
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std::string GetFlagValue(const std::string& flag) const {
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const size_t index = IndexOfFlag(flag);
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return index == flags_.size() ? "" : flags_[index].second;
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}
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// Set 'flag' to 'value'. If 'value' is empty, 'flag' is considered
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// present but without a value. If a flag is not in this, it is appended
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// at the end of flags. If a flag is repeated, only the occurrence is updated.
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void SetFlagValue(const std::string& flag, const std::string& value) {
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const size_t index = IndexOfFlag(flag);
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if (index < flags_.size()) {
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flags_[index].second = value;
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} else {
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flags_.push_back(std::make_pair(flag, value));
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}
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}
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// Returns a strings with all flags separated by colons in lexicographical
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// order. The result also begins and ends with colons.
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std::string ToString() const;
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private:
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// Returns index of 'flag' in flags_ or flags_.size() if not found.
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size_t IndexOfFlag(const std::string& flag) const {
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const size_t flags_size = flags_.size();
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size_t i = 0;
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// Search backward so that we pick the last occurrence of a repeated flag.
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while (i < flags_size) {
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size_t pos = flags_size - 1 - i;
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if (flags_[pos].first == flag) {
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return pos;
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}
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++i;
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}
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return flags_size;
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}
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// Individual flags with their optional values as a vector of string pairs.
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// To make this suitable for the runner, we use std::vector<>, which is not
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// very efficient to look up. This should not be a problem as the number of
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// flags are quite small.
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std::vector<std::pair<std::string, std::string>> flags_;
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};
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} // namespace fuzztest::internal
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#endif // THIRD_PARTY_CENTIPEDE_RUNNER_FLAGS_H_
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