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fparser.hh
00001 /***************************************************************************\ 00002 |* Function parser v2.2 by Warp *| 00003 |* *| 00004 |* Qt translations, degrees/angle, more functions(cot,sec,csc), *| 00005 |* and modified log function added by *| 00006 |* Fungmeista (mizunoami44@users.sourceforge.net). *| 00007 |* ---------------------------- *| 00008 |* Parses and evaluates the given funtion with the given variable values. *| 00009 |* *| 00010 \***************************************************************************/ 00011 00012 #ifndef ONCE_FPARSER_H_ 00013 #define ONCE_FPARSER_H_ 00014 00015 #include <string> 00016 #include <map> 00017 00022 class FunctionParser 00023 { 00024 public: 00025 int Parse(const std::string& Function, const std::string& Vars); 00026 const char* ErrorMsg(void) const; 00027 double Eval(const double* Vars); 00028 inline int EvalError(void) const { return EvalErrorType; } 00029 00030 00031 00032 FunctionParser(int mode = RADIANS); //angle added by Fungmeista 00033 ~FunctionParser(); 00034 static const int DEGREES = 0; //added by Fungmeista 00035 static const int RADIANS = 1; // ditto 00036 00037 00038 protected: 00039 int ParseErrorType; //moved from private to protected by Fungmeista 00040 00041 //======================================================================== 00042 private: 00043 //======================================================================== 00044 int varAmount, EvalErrorType; 00045 00046 typedef std::map<std::string, unsigned> VarMap_t; 00047 VarMap_t Variables; 00048 00049 struct Comp 00050 { Comp(); 00051 Comp(const Comp&); 00052 ~Comp(); 00053 00054 unsigned* ByteCode; 00055 unsigned ByteCodeSize; 00056 double* Immed; 00057 unsigned ImmedSize; 00058 double* Stack; 00059 unsigned StackSize, StackPtr; 00060 bool thisIsACopy; 00061 } Comp; 00062 00063 VarMap_t::const_iterator FindVariable(const char*); 00064 int CheckSyntax(const char*); 00065 bool Compile(const char*); 00066 bool IsVariable(int); 00067 void AddCompiledByte(unsigned); 00068 int CompileIf(const char*, int); 00069 int CompileElement(const char*, int); 00070 int CompilePow(const char*, int); 00071 int CompileMult(const char*, int); 00072 int CompileAddition(const char*, int); 00073 int CompileComparison(const char*, int); 00074 int CompileAnd(const char*, int); 00075 int CompileOr(const char*, int); 00076 int CompileExpression(const char*, int, bool=false); 00077 00078 FunctionParser(const FunctionParser&); 00079 int mode; //added by Fungmeista for angle mode (radians/degrees) 00080 }; 00081 00082 #endif
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