1 files changed, 156 insertions, 0 deletions
diff --git a/starmath/inc/parse.hxx b/starmath/inc/parse.hxx
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+++ b/starmath/inc/parse.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * 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
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_STARMATH_INC_PARSE_HXX
+#define INCLUDED_STARMATH_INC_PARSE_HXX
+
+#include <unotools/charclass.hxx>
+#include <memory>
+#include <set>
+#include <vector>
+
+#include "token.hxx"
+#include "error.hxx"
+
+class SmBlankNode;
+class SmBracebodyNode;
+class SmExpressionNode;
+class SmGlyphSpecialNode;
+class SmNode;
+class SmOperNode;
+class SmSpecialNode;
+class SmStructureNode;
+class SmTableNode;
+class SmTextNode;
+
+#define DEPTH_LIMIT 1024
+
+class SmParser
+{
+    OUString        m_aBufferString;
+    SmToken         m_aCurToken;
+    std::vector<std::unique_ptr<SmErrorDesc>> m_aErrDescList;
+    int             m_nCurError;
+    sal_Int32       m_nBufferIndex,
+                    m_nTokenIndex;
+    sal_Int32       m_nRow,    // 1-based
+                    m_nColOff; // 0-based
+    bool            m_bImportSymNames,
+                    m_bExportSymNames;
+    sal_Int32       m_nParseDepth;
+
+    class DepthProtect
+    {
+    private:
+        sal_Int32& m_rParseDepth;
+    public:
+        DepthProtect(sal_Int32& rParseDepth)
+            : m_rParseDepth(rParseDepth)
+        {
+            ++m_rParseDepth;
+        }
+        bool TooDeep() const { return m_rParseDepth > DEPTH_LIMIT; }
+        ~DepthProtect()
+        {
+            --m_rParseDepth;
+        }
+    };
+
+    // map of used symbols (used to reduce file size by exporting only actually used symbols)
+    std::set< OUString >   m_aUsedSymbols;
+
+    // CharClass representing a locale for parsing numbers
+    CharClass m_aNumCC;
+    // pointer to System locale's CharClass, which is alive inside SM_MOD()
+    const CharClass* m_pSysCC;
+
+    SmParser(const SmParser&) = delete;
+    SmParser& operator=(const SmParser&) = delete;
+
+    void            NextToken();
+    sal_Int32       GetTokenIndex() const   { return m_nTokenIndex; }
+    void            Replace( sal_Int32 nPos, sal_Int32 nLen, const OUString &rText );
+
+    inline bool     TokenInGroup( TG nGroup );
+
+    // grammar
+    std::unique_ptr<SmTableNode> DoTable();
+    std::unique_ptr<SmNode> DoLine();
+    std::unique_ptr<SmNode> DoExpression(bool bUseExtraSpaces = true);
+    std::unique_ptr<SmNode> DoRelation();
+    std::unique_ptr<SmNode> DoSum();
+    std::unique_ptr<SmNode> DoProduct();
+    std::unique_ptr<SmNode> DoSubSup(TG nActiveGroup, SmNode *pGivenNode);
+    std::unique_ptr<SmNode> DoOpSubSup();
+    std::unique_ptr<SmNode> DoPower();
+    std::unique_ptr<SmBlankNode> DoBlank();
+    std::unique_ptr<SmNode> DoTerm(bool bGroupNumberIdent);
+    std::unique_ptr<SmNode> DoEscape();
+    std::unique_ptr<SmOperNode> DoOperator();
+    std::unique_ptr<SmNode> DoOper();
+    std::unique_ptr<SmStructureNode> DoUnOper();
+    std::unique_ptr<SmNode> DoAlign(bool bUseExtraSpaces = true);
+    std::unique_ptr<SmStructureNode> DoFontAttribut();
+    std::unique_ptr<SmStructureNode> DoAttribut();
+    std::unique_ptr<SmStructureNode> DoFont();
+    std::unique_ptr<SmStructureNode> DoFontSize();
+    std::unique_ptr<SmStructureNode> DoColor();
+    std::unique_ptr<SmStructureNode> DoBrace();
+    std::unique_ptr<SmBracebodyNode> DoBracebody(bool bIsLeftRight);
+    std::unique_ptr<SmTextNode> DoFunction();
+    std::unique_ptr<SmTableNode> DoBinom();
+    std::unique_ptr<SmStructureNode> DoStack();
+    std::unique_ptr<SmStructureNode> DoMatrix();
+    std::unique_ptr<SmSpecialNode> DoSpecial();
+    std::unique_ptr<SmGlyphSpecialNode> DoGlyphSpecial();
+    std::unique_ptr<SmExpressionNode> DoError(SmParseError Error);
+    // end of grammar
+
+public:
+                 SmParser();
+
+    /** Parse rBuffer to formula tree */
+    std::unique_ptr<SmTableNode> Parse(const OUString &rBuffer);
+    /** Parse rBuffer to formula subtree that constitutes an expression */
+    std::unique_ptr<SmNode> ParseExpression(const OUString &rBuffer);
+
+    const OUString & GetText() const { return m_aBufferString; };
+
+    bool        IsImportSymbolNames() const        { return m_bImportSymNames; }
+    void        SetImportSymbolNames(bool bVal)    { m_bImportSymNames = bVal; }
+    bool        IsExportSymbolNames() const        { return m_bExportSymNames; }
+    void        SetExportSymbolNames(bool bVal)    { m_bExportSymNames = bVal; }
+
+    void        AddError(SmParseError Type, SmNode *pNode);
+    const SmErrorDesc*  NextError();
+    const SmErrorDesc*  PrevError();
+    const SmErrorDesc*  GetError();
+    static const SmTokenTableEntry* GetTokenTableEntry( const OUString &rName );
+    const std::set< OUString >&   GetUsedSymbols() const      { return m_aUsedSymbols; }
+};
+
+
+inline bool SmParser::TokenInGroup( TG nGroup)
+{
+    return bool(m_aCurToken.nGroup & nGroup);
+}
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */