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Diffstat (limited to 'muparser/muParserTokenReader.h')
| -rw-r--r-- | muparser/muParserTokenReader.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/muparser/muParserTokenReader.h b/muparser/muParserTokenReader.h new file mode 100644 index 0000000..122586e --- /dev/null +++ b/muparser/muParserTokenReader.h @@ -0,0 +1,156 @@ +/*
+ __________
+ _____ __ __\______ \_____ _______ ______ ____ _______
+ / \ | | \| ___/\__ \ \_ __ \/ ___/_/ __ \\_ __ \
+ | Y Y \| | /| | / __ \_| | \/\___ \ \ ___/ | | \/
+ |__|_| /|____/ |____| (____ /|__| /____ > \___ >|__|
+ \/ \/ \/ \/
+ Copyright (C) 2004-2006 Ingo Berg
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy of this
+ software and associated documentation files (the "Software"), to deal in the Software
+ without restriction, including without limitation the rights to use, copy, modify,
+ merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in all copies or
+ substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef MU_PARSER_TOKEN_READER_H
+#define MU_PARSER_TOKEN_READER_H
+
+#include <cassert>
+#include <cstdio>
+#include <cstring>
+#include <map>
+#include <memory>
+#include <stack>
+#include <string>
+
+#include "muParserDef.h"
+#include "muParserToken.h"
+
+
+namespace mu
+{
+
+ // Forward declaration
+ class ParserBase;
+
+ /** \brief Token reader for the ParserBase class.
+
+ */
+ class ParserTokenReader
+ {
+ private:
+ typedef ParserToken<value_type, string_type> token_type;
+
+ private:
+ ParserBase *m_pParser;
+ string_type m_strFormula;
+ int m_iPos;
+ int m_iSynFlags;
+ bool m_bIgnoreUndefVar;
+
+ const funmap_type *m_pFunDef;
+ const funmap_type *m_pPostOprtDef;
+ const funmap_type *m_pInfixOprtDef;
+ const funmap_type *m_pOprtDef;
+ const valmap_type *m_pConstDef;
+ const strmap_type *m_pStrVarDef;
+ varmap_type *m_pVarDef; ///< The only non const pointer to parser internals
+ facfun_type m_pFactory;
+ void *m_pFactoryData;
+ std::vector<identfun_type> m_vIdentFun; ///< Value token identification function
+ varmap_type m_UsedVar;
+ value_type m_fZero; ///< Dummy value of zero, referenced by undefined variables
+ int m_iBrackets;
+
+ //
+ // private Functions
+ //
+ private:
+
+ /** \brief Syntax codes.
+
+ The syntax codes control the syntax check done during the first time parsing of
+ the expression string. They are flags that indicate which tokens are allowed next
+ if certain tokens are identified.
+ */
+ enum ESynCodes
+ {
+ noBO = 1 << 0, ///< to avoid i.e. "cos(7)("
+ noBC = 1 << 1, ///< to avoid i.e. "sin)" or "()"
+ noVAL = 1 << 2, ///< to avoid i.e. "tan 2" or "sin(8)3.14"
+ noVAR = 1 << 3, ///< to avoid i.e. "sin a" or "sin(8)a"
+ noCOMMA = 1 << 4, ///< to avoid i.e. ",," or "+," ...
+ noFUN = 1 << 5, ///< to avoid i.e. "sqrt cos" or "(1)sin"
+ noOPT = 1 << 6, ///< to avoid i.e. "(+)"
+ noPOSTOP = 1 << 7, ///< to avoid i.e. "(5!!)" "sin!"
+ noINFIXOP = 1 << 8, ///< to avoid i.e. "++4" "!!4"
+ noEND = 1 << 9, ///< to avoid unexpected end of formula
+ noSTR = 1 << 10, ///< to block numeric arguments on string functions
+ noASSIGN = 1 << 11, ///< to block assignement to constant i.e. "4=7"
+ noANY = ~0 ///< All of he above flags set
+ };
+
+ ParserTokenReader(const ParserTokenReader &a_Reader);
+ ParserTokenReader& operator=(const ParserTokenReader &a_Reader);
+ void Assign(const ParserTokenReader &a_Reader);
+
+ public:
+ ParserTokenReader(ParserBase *a_pParent);
+ ~ParserTokenReader();
+ ParserTokenReader* Clone(ParserBase *a_pParent) const;
+
+ void AddValIdent(identfun_type a_pCallback);
+ void SetVarCreator(facfun_type a_pFactory, void *pUserData);
+ int GetPos() const;
+ const string_type& GetFormula() const;
+ const varmap_type& GetUsedVar() const;
+ void SetFormula(const string_type &a_strFormula);
+ void SetDefs( const funmap_type *a_pFunDef,
+ const funmap_type *a_pOprtDef,
+ const funmap_type *a_pInfixOprtDef,
+ const funmap_type *a_pPostOprtDef,
+ varmap_type *a_pVarDef,
+ const strmap_type *a_pStrVarDef,
+ const valmap_type *a_pConstDef );
+ void IgnoreUndefVar(bool bIgnore);
+ void ReInit();
+ token_type ReadNextToken();
+
+ //
+ // private functions
+ //
+ private:
+
+ void SetParent(ParserBase *a_pParent);
+ int ExtractToken( const char_type *a_szCharSet,
+ string_type &a_strTok, int a_iPos ) const;
+ bool IsBuiltIn(token_type &a_Tok);
+ bool IsEOF(token_type &a_Tok);
+ bool IsInfixOpTok(token_type &a_Tok);
+ bool IsFunTok(token_type &a_Tok);
+ bool IsPostOpTok(token_type &a_Tok);
+ bool IsOprt(token_type &a_Tok);
+ bool IsValTok(token_type &a_Tok);
+ bool IsVarTok(token_type &a_Tok);
+ bool IsStrVarTok(token_type &a_Tok);
+ bool IsUndefVarTok(token_type &a_Tok);
+ bool IsString(token_type &a_Tok);
+ void Error( EErrorCodes a_iErrc, int a_iPos = -1,
+ const string_type &a_sTok = string_type() ) const;
+ };
+} // namespace mu
+
+#endif
+
+
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