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Libraries: Move to Userland/Libraries/
This commit is contained in:
Andreas Kling
parent
dc28c07fa5
commit
13d7c09125
1857 changed files with 266 additions and 274 deletions
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/*
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* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "RegexByteCode.h"
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#include "RegexError.h"
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#include "RegexLexer.h"
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#include "RegexOptions.h"
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#include <AK/Forward.h>
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#include <AK/StringBuilder.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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namespace regex {
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class PosixExtendedParser;
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class ECMA262Parser;
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template<typename T>
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struct GenericParserTraits {
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using OptionsType = T;
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};
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template<typename T>
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struct ParserTraits : public GenericParserTraits<T> {
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};
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template<>
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struct ParserTraits<PosixExtendedParser> : public GenericParserTraits<PosixOptions> {
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};
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template<>
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struct ParserTraits<ECMA262Parser> : public GenericParserTraits<ECMAScriptOptions> {
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};
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class Parser {
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public:
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struct Result {
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ByteCode bytecode;
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size_t capture_groups_count;
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size_t named_capture_groups_count;
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size_t match_length_minimum;
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Error error;
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Token error_token;
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};
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explicit Parser(Lexer& lexer)
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: m_parser_state(lexer)
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{
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}
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Parser(Lexer& lexer, AllOptions regex_options)
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: m_parser_state(lexer, regex_options)
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{
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}
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virtual ~Parser() = default;
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Result parse(Optional<AllOptions> regex_options = {});
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bool has_error() const { return m_parser_state.error != Error::NoError; }
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Error error() const { return m_parser_state.error; }
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protected:
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virtual bool parse_internal(ByteCode&, size_t& match_length_minimum) = 0;
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ALWAYS_INLINE bool match(TokenType type) const;
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ALWAYS_INLINE bool match(char ch) const;
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ALWAYS_INLINE bool match_ordinary_characters();
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ALWAYS_INLINE Token consume();
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ALWAYS_INLINE Token consume(TokenType type, Error error);
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ALWAYS_INLINE bool consume(const String&);
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ALWAYS_INLINE bool try_skip(StringView);
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ALWAYS_INLINE char skip();
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ALWAYS_INLINE void reset();
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ALWAYS_INLINE bool done() const;
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ALWAYS_INLINE bool set_error(Error error);
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struct ParserState {
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Lexer& lexer;
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Token current_token;
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Error error = Error::NoError;
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Token error_token { TokenType::Eof, 0, StringView(nullptr) };
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ByteCode bytecode;
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size_t capture_groups_count { 0 };
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size_t named_capture_groups_count { 0 };
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size_t match_length_minimum { 0 };
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AllOptions regex_options;
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HashMap<int, size_t> capture_group_minimum_lengths;
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HashMap<FlyString, size_t> named_capture_group_minimum_lengths;
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HashMap<size_t, FlyString> named_capture_groups;
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explicit ParserState(Lexer& lexer)
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: lexer(lexer)
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, current_token(lexer.next())
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{
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}
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explicit ParserState(Lexer& lexer, AllOptions regex_options)
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: lexer(lexer)
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, current_token(lexer.next())
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, regex_options(regex_options)
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{
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}
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};
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ParserState m_parser_state;
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};
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class PosixExtendedParser final : public Parser {
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public:
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explicit PosixExtendedParser(Lexer& lexer)
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: Parser(lexer)
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{
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}
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PosixExtendedParser(Lexer& lexer, Optional<typename ParserTraits<PosixExtendedParser>::OptionsType> regex_options)
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: Parser(lexer, regex_options.value_or({}))
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{
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}
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~PosixExtendedParser() = default;
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private:
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ALWAYS_INLINE bool match_repetition_symbol();
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bool parse_internal(ByteCode&, size_t&) override;
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bool parse_root(ByteCode&, size_t&);
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ALWAYS_INLINE bool parse_sub_expression(ByteCode&, size_t&);
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ALWAYS_INLINE bool parse_bracket_expression(ByteCode&, size_t&);
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ALWAYS_INLINE bool parse_repetition_symbol(ByteCode&, size_t&);
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};
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class ECMA262Parser final : public Parser {
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public:
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explicit ECMA262Parser(Lexer& lexer)
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: Parser(lexer)
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{
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}
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ECMA262Parser(Lexer& lexer, Optional<typename ParserTraits<ECMA262Parser>::OptionsType> regex_options)
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: Parser(lexer, regex_options.value_or({}))
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{
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}
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~ECMA262Parser() = default;
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private:
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bool parse_internal(ByteCode&, size_t&) override;
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enum class ReadDigitsInitialZeroState {
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Allow,
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Disallow,
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Require,
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};
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enum class ReadDigitFollowPolicy {
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Any,
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DisallowDigit,
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DisallowNonDigit,
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};
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Optional<unsigned> read_digits(ReadDigitsInitialZeroState initial_zero = ReadDigitsInitialZeroState::Allow, ReadDigitFollowPolicy follow_policy = ReadDigitFollowPolicy::Any, bool hex = false, int max_count = -1);
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StringView read_capture_group_specifier(bool take_starting_angle_bracket = false);
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bool parse_pattern(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_disjunction(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_alternative(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_term(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_assertion(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_atom(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_quantifier(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_atom_escape(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_character_class(ByteCode&, size_t&, bool unicode, bool named);
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bool parse_capture_group(ByteCode&, size_t&, bool unicode, bool named);
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Optional<CharClass> parse_character_class_escape(bool& out_inverse, bool expect_backslash = false);
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bool parse_nonempty_class_ranges(Vector<CompareTypeAndValuePair>&, bool unicode);
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};
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using PosixExtended = PosixExtendedParser;
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using ECMA262 = ECMA262Parser;
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}
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using regex::ECMA262;
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using regex::PosixExtended;
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