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/*
* Copyright 2005 Maksim Orlovich <maksim@kde.org>
* Copyright (C) 2006 Apple Computer, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PARSER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PARSER_H_
#include <memory>
#include "base/macros.h"
#include "third_party/blink/renderer/core/xml/xpath_predicate.h"
#include "third_party/blink/renderer/core/xml/xpath_step.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
namespace blink {
class ExceptionState;
class XPathNSResolver;
namespace xpath {
class Expression;
class LocationPath;
class Parser;
struct Token {
STACK_ALLOCATED();
public:
int type;
String str;
Step::Axis axis;
NumericOp::Opcode numop;
EqTestOp::Opcode eqop;
Token(int t) : type(t) {}
Token(int t, const String& v) : type(t), str(v) {}
Token(int t, Step::Axis v) : type(t), axis(v) {}
Token(int t, NumericOp::Opcode v) : type(t), numop(v) {}
Token(int t, EqTestOp::Opcode v) : type(t), eqop(v) {}
};
class Parser {
STACK_ALLOCATED();
public:
Parser();
~Parser();
XPathNSResolver* Resolver() const { return resolver_.Get(); }
bool ExpandQName(const String& q_name,
AtomicString& local_name,
AtomicString& namespace_uri);
Expression* ParseStatement(const String& statement,
XPathNSResolver*,
ExceptionState&);
static Parser* Current() { return current_parser_; }
int Lex(void* yylval);
Member<Expression> top_expr_;
bool got_namespace_error_;
void RegisterString(String*);
void DeleteString(String*);
private:
bool IsBinaryOperatorContext() const;
void SkipWS();
Token MakeTokenAndAdvance(int type, int advance = 1);
Token MakeTokenAndAdvance(int type, NumericOp::Opcode, int advance = 1);
Token MakeTokenAndAdvance(int type, EqTestOp::Opcode, int advance = 1);
char PeekAheadHelper();
char PeekCurHelper();
Token LexString();
Token LexNumber();
bool LexNCName(String&);
bool LexQName(String&);
Token NextToken();
Token NextTokenInternal();
void Reset(const String& data);
static Parser* current_parser_;
unsigned next_pos_;
String data_;
int last_token_type_;
Member<XPathNSResolver> resolver_;
HashSet<std::unique_ptr<String>> strings_;
DISALLOW_COPY_AND_ASSIGN(Parser);
};
} // namespace xpath
} // namespace blink
int xpathyyparse(blink::xpath::Parser*);
#endif
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