MathParser.h

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//-----------------------------------------------------------------------------
//  (c) 2006 by Basler Vision Technologies
//  Section: Vision Components
//  Project: GenApi
//  Author:  Margret Albrecht
//  $Header$
//
// License: Derived from Kirill Zaborski's MathParser library (http://kirya.narod.ru/mathparser.html ).
// This library comes under LGPL license (see http://www.gnu.org/licenses/lgpl.html).
// Kirill's implementation is a C++ port of the CCalc library from Walery Studennikov (http://www.sama.ru/~despair/ccalc/)
// which also comes under the LGPL.
//-----------------------------------------------------------------------------
#ifndef _MATHPARSER_H_
#define _MATHPARSER_H_
 
#include "MathParserDll.h"
#include "GenApi/Types.h"
#include "GenApi/GenApiDll.h"
#include "StrMap.h"
#include "Lexer.h"
 
#include <vector>
 
#ifdef _MSC_VER // *JS*
#   pragma warning(push)
#   pragma warning(disable: 4251) // class 'xxx' needs to have dll-interface to be used by clients of class 'yyy'
#endif
 
#define ORIGINAL_STACK_SIZE 64
 
namespace GENAPI_NAMESPACE
{
    extern const double DblErR;
    extern const double DblNiN;
    
    
    typedef double ( *OneArgFunc ) ( double arg );
    typedef char* ( *MultiArgFunc ) ( int paramcnt, double* args,
                                      CStrMap* strparams, double* result );
    typedef int ( *PrmSrchFunc ) ( const char* str, size_t len, double* value,
                                   void* param );
    class MATHPARSERDLL_API CMathParser
    {
        typedef enum
        {
            // Binary
            OP_SHL, OP_SHR, OP_POW,
            OP_LOGIC_NEQ, OP_LOGIC_GEQ, OP_LOGIC_LEQ,
            OP_LOGIC_AND, OP_LOGIC_OR, // Logical
            OP_COMSTART, OP_ASSIGN, // For internal needs
            OP_OBR, // Special
            OP_ADD, OP_SUB, OP_MUL, OP_DIV, OP_MOD, OP_UNK, // Arithmetic
            OP_XOR, OP_NOT, OP_AND, OP_OR, // Bitwise
            OP_EQU, OP_GREATER, OP_LESS,
            OP_LOGIC, OP_LOGIC_SEP, OP_CBR, OP_COMMA, // Logical
            OP_FORMULAEND, // For script
            OP_INDEX_TO_VAR, OP_FUNC_ONEARG, OP_FUNC_MULTIARG // Special
        } OperType_t;
        static const signed char OpPriorities[OP_FUNC_MULTIARG + 1];
        typedef struct Operation
        {
            OperType_t  OperType;
            const void* Func;
            signed char PrevValTop;
            CStrMap*    StrParams;
            explicit Operation() : Func( 0 ), PrevValTop( 0 ), StrParams( 0 ) {}
            explicit Operation( OperType_t op ) : OperType( op ), Func( 0 ), PrevValTop( 0 ), StrParams( 0 ) {}
            explicit Operation( OperType_t op, const void* p, signed char a, CStrMap* pM ) : OperType( op ), Func( p ), PrevValTop( a ), StrParams( pM ) {}
        } Operation;
        static const Operation BrOp;
        static const Operation CbrOp;
        static const Operation NegOp;
        static const Operation ItvOp;
        static const Operation CommaOp;
        std::vector<Operation> OpStack;
        std::vector<Operation> OpStackEval;
        std::vector<double> ValStack;
        std::vector<double> ValStackEval;
        int    OpTop, ValTop;
        int    ObrDist;
        CLexer Lexer;
        CStrMap* VarParams;
        std::vector<char> errbuf;
        static CStaticFuncMapDouble DoubleFunctions;
        static CSymTable MathSymTable;
        const char* ParseFormula( bool ConvertUpperCase );
        const char* PrepareFormula();
        const char* Calc();
        const char* CalcToObr();
    public:
        CStrMap* Parameters;
        CStrMap* ExtFunctions;
        PrmSrchFunc MoreParams;
        void*  ParamFuncParam;
        CMathParser( void );
        const char* Parse( const char* Formula, bool ConvertUpperCase );
        const char* Eval( double* result );
        ~CMathParser();
    };
 
} /* GENAPI_NAMESPACE*/
 
#ifdef _MSC_VER // *JS*
#   pragma warning(pop)
#endif
 
#endif //_MATHPARSER_H_