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62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2022 Alibaba Group Holding Ltd.
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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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*/
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#pragma once
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#include <stdexcept>
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#include <string>
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#include "re2/re2.h"
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namespace Wasm::Common::Regex {
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class CompiledGoogleReMatcher {
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public:
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CompiledGoogleReMatcher(const std::string& regex,
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bool do_program_size_check = true)
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: regex_(regex, re2::RE2::Quiet) {
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if (!regex_.ok()) {
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throw std::runtime_error(regex_.error());
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}
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if (do_program_size_check) {
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const auto regex_program_size =
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static_cast<uint32_t>(regex_.ProgramSize());
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if (regex_program_size > 100) {
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throw std::runtime_error("too complex regex: " + regex);
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}
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}
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}
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bool match(std::string_view value) const {
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return re2::RE2::FullMatch(re2::StringPiece(value.data(), value.size()),
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regex_);
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}
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std::string replaceAll(std::string_view value,
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std::string_view substitution) const {
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std::string result = std::string(value);
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re2::RE2::GlobalReplace(
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&result, regex_,
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re2::StringPiece(substitution.data(), substitution.size()));
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return result;
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}
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private:
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const re2::RE2 regex_;
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};
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} // namespace Wasm::Common::Regex
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