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XPathParser.h
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81 lines (63 loc) · 2.65 KB
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/*
* Copyright 2005 Maksim Orlovich <maksim@kde.org>
* Copyright (C) 2006, 2013 Apple Inc. All rights reserved.
*
* 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.
*/
#pragma once
#include "ExceptionOr.h"
#include "XPathPredicate.h"
union YYSTYPE;
namespace WebCore {
class XPathNSResolver;
namespace XPath {
class Parser {
WTF_MAKE_NONCOPYABLE(Parser);
public:
static ExceptionOr<std::unique_ptr<Expression>> parseStatement(const String& statement, RefPtr<XPathNSResolver>&&);
int lex(YYSTYPE&);
bool expandQualifiedName(const String& qualifiedName, String& localName, String& namespaceURI);
void setParseResult(std::unique_ptr<Expression>&& expression) { m_result = WTFMove(expression); }
private:
Parser(const String&, RefPtr<XPathNSResolver>&&);
struct Token;
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();
const String& m_data;
RefPtr<XPathNSResolver> m_resolver;
unsigned m_nextPos { 0 };
int m_lastTokenType { 0 };
std::unique_ptr<Expression> m_result;
bool m_sawNamespaceError { false };
};
} }