parsebase.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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 */
 
#pragma once
 
#include <unotools/resmgr.hxx>
 
#include "node.hxx"
 
#include <set>
#include <utility>
 
#define DEPTH_LIMIT 1024
 
// Those are the errors that the parser may encounter.
enum class SmParseError : uint_fast8_t
{
    None = 0,
    UnexpectedChar = 1,
    UnexpectedToken = 2,
    PoundExpected = 3,
    ColorExpected = 4,
    LgroupExpected = 5,
    RgroupExpected = 6,
    LbraceExpected = 7,
    RbraceExpected = 8,
    ParentMismatch = 9,
    RightExpected = 10,
    FontExpected = 11,
    SizeExpected = 12,
    DoubleAlign = 13,
    DoubleSubsupscript = 14,
    NumberExpected = 15
};
 
struct SmErrorDesc
{
    SmParseError m_eType;
    SmNode* m_pNode;
    OUString m_aText;
 
    SmErrorDesc(SmParseError eType, SmNode* pNode, OUString aText)
        : m_eType(eType)
        , m_pNode(pNode)
        , m_aText(std::move(aText))
    {
    }
};
 
class DepthProtect
{
private:
    sal_Int32& m_rParseDepth;
 
public:
    DepthProtect(sal_Int32& rParseDepth)
        : m_rParseDepth(rParseDepth)
    {
        ++m_rParseDepth;
        if (m_rParseDepth > DEPTH_LIMIT)
            throw std::range_error("parser depth limit");
    }
    ~DepthProtect() { --m_rParseDepth; }
};
 
namespace starmathdatabase
{
// Must be in sync with SmParseError list
extern const TranslateId SmParseErrorDesc[16];
 
OUString getParseErrorDesc(SmParseError err);
}
 
class AbstractSmParser
{
public:
    virtual ~AbstractSmParser() {}
 
    virtual std::unique_ptr<SmTableNode> Parse(const OUString& rBuffer) = 0;
    virtual std::unique_ptr<SmNode> ParseExpression(const OUString& rBuffer) = 0;
 
    virtual const OUString& GetText() const = 0;
 
    virtual bool IsImportSymbolNames() const = 0;
    virtual void SetImportSymbolNames(bool bVal) = 0;
    virtual bool IsExportSymbolNames() const = 0;
    virtual void SetExportSymbolNames(bool bVal) = 0;
 
    virtual const SmErrorDesc* NextError() = 0;
    virtual const SmErrorDesc* PrevError() = 0;
    virtual const SmErrorDesc* GetError() const = 0;
    virtual const std::set<OUString>& GetUsedSymbols() const = 0;
};
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */