[2510] | 1 | #include <stdlib.h>
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| 2 | #include <stdio.h>
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| 3 | #include <ctype.h>
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| 4 | #include <string.h>
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| 5 | #include "cexpre.h"
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| 6 | #include <stack>
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| 7 | #include <math.h>
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| 8 |
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| 9 | namespace SOPHYA {
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| 10 |
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| 11 | long CExprBase::totnexp_create = 0;
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| 12 | long CExprBase::totnexp_delete = 0;
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| 13 | CExprBase::CExprBase()
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| 14 | {
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| 15 | totnexp_create++;
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| 16 | // cout << "CExprBase::CExprBase()-Creation " << hex << this << dec << endl;
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| 17 | }
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| 18 |
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| 19 | CExprBase::~CExprBase()
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| 20 | {
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| 21 | totnexp_delete++;
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| 22 | // cout << "CExprBase::~CExprBase() " << hex << this << dec << endl;
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| 23 | }
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| 24 |
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| 25 | void CExprBase::CheckThrow(const char * msg) const
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| 26 | {
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| 27 | string errmsg;
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| 28 | bool ok = CheckE(errmsg);
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| 29 | if (ok) return;
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| 30 | else {
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| 31 | errmsg += msg;
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| 32 | throw CExprException(errmsg);
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| 33 | }
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| 34 | }
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| 35 |
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| 36 | //---------------------------------------------------------
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| 37 | class CE_NumberExp : public CExprBase {
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| 38 | public:
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| 39 | CE_NumberExp(double v) { _val = v; }
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| 40 | CE_NumberExp(string const & s);
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| 41 | virtual ~CE_NumberExp() {}
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| 42 | virtual double Evaluate() const { return _val; }
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| 43 | virtual void Print(ostream& os) const { os << _val; }
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| 44 | protected:
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| 45 | double _val;
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| 46 | };
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| 47 |
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| 48 | CE_NumberExp::CE_NumberExp(string const & s)
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| 49 | {
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| 50 | size_t l = s.length();
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| 51 | if (l < 1) {
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| 52 | string errmsg = "CE_NumberExp::CE_NumberExp() Empty expression";
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| 53 | throw CExprException(errmsg);
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| 54 | }
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| 55 | if (s == "Pi") _val = M_PI;
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| 56 | else if (s == "E") _val = M_E;
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| 57 | else {
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| 58 | string errmsg = "CE_NumberExp::CE_NumberExp() Bad numerical constant: ";
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| 59 | errmsg += s;
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| 60 |
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[2518] | 61 | char* lcc;
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| 62 | _val = strtod(s.c_str(), &lcc);
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| 63 | if (*lcc != '\0') throw CExprException(errmsg);
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[2510] | 64 | }
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| 65 | }
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| 66 |
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[2550] | 67 | //---------------------------------------------------------
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| 68 | //----------- Expression changement de signe -------------
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| 69 | class CE_ChsExp : public CExprBase {
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| 70 | public:
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| 71 | explicit CE_ChsExp(CExprBase * e) { _e = e; }
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| 72 | virtual ~CE_ChsExp() { if (_e) delete _e; }
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| 73 | virtual double Evaluate() const { return -_e->Evaluate(); }
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| 74 | virtual bool CheckE(string& errmsg) const { if (_e) return true; else return false; }
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| 75 | virtual void Print(ostream& os) const { os << "-( "; _e->Print(os); os << " )"; }
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| 76 | protected:
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| 77 | CExprBase * _e;
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| 78 | };
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[2510] | 79 |
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| 80 | //---------------------------------------------------------
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| 81 | class CE_BinExp : public CExprBase {
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| 82 | public:
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| 83 | explicit CE_BinExp(char op, int prior);
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| 84 | virtual ~CE_BinExp() { if (_e1) delete _e1; if (_e2) delete _e2; }
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| 85 | inline void SetE1(CExprBase * e) { _e1 = e; }
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| 86 | inline void SetE2(CExprBase * e) { _e2 = e; }
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| 87 | virtual bool CheckE(string& errmsg) const;
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| 88 | virtual void Print(ostream& os) const;
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| 89 | inline char BOpC() const { return _bop; }
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| 90 | inline int Priority() const { return _priority; }
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| 91 | protected:
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| 92 | CExprBase * _e1;
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| 93 | CExprBase * _e2;
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| 94 | char _bop; // Caractere identificateur d'operation (+,-,*,/ ...)
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| 95 | int _priority; // Niveau de priorite: 1= +,- 2: *,/ 3: ^...
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| 96 | };
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| 97 |
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| 98 | CE_BinExp::CE_BinExp(char op, int prior)
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| 99 | {
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| 100 | _e1 = NULL; _e2 = NULL;
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| 101 | _bop = op;
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| 102 | _priority = prior;
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| 103 | }
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| 104 |
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| 105 | bool CE_BinExp::CheckE(string& errmsg) const
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| 106 | {
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| 107 | if ((_e1 == NULL) || (_e2 == NULL)) {
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| 108 | errmsg += "CE_BinExp::CheckE: Binary expression-missing argument ";
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| 109 | return false;
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| 110 | }
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| 111 | return true;
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| 112 | }
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| 113 |
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| 114 | void CE_BinExp::Print(ostream& os) const
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| 115 | {
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| 116 | os << "(" << (*_e1) << _bop << (*_e2) << ")" ;
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| 117 | }
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| 118 |
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| 119 | //---------------------------------------------------------
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| 120 | class CE_AddExp : public CE_BinExp {
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| 121 | public:
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| 122 | CE_AddExp() : CE_BinExp('+',1) {}
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| 123 | virtual double Evaluate() const { CheckThrow("CE_AddExp::Evaluate"); return _e1->Evaluate()+_e2->Evaluate();
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| 124 | }
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| 125 | };
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| 126 | class CE_MulExp : public CE_BinExp {
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| 127 | public:
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| 128 | CE_MulExp() : CE_BinExp('*',2) {}
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| 129 | virtual double Evaluate() const { CheckThrow("CE_MulExp::Evaluate"); return _e1->Evaluate()*_e2->Evaluate(); }
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| 130 | };
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| 131 | class CE_SubExp : public CE_BinExp {
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| 132 | public:
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| 133 | CE_SubExp() : CE_BinExp('-',1) {}
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| 134 | virtual double Evaluate() const { CheckThrow("CE_SubExp::Evaluate"); return _e1->Evaluate()-_e2->Evaluate(); }
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| 135 | };
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| 136 | class CE_DivExp : public CE_BinExp {
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| 137 | public:
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| 138 | CE_DivExp() : CE_BinExp('/',2) {}
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| 139 | virtual double Evaluate() const { CheckThrow("CE_DivExp::Evaluate"); return _e1->Evaluate()/_e2->Evaluate(); }
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| 140 | };
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| 141 |
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| 142 | //---------------------------------------------------------
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| 143 | typedef double (* f0exp) ();
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| 144 | typedef double (* f1exp) (double x);
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| 145 | typedef double (* f2exp) (double x, double y);
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| 146 | typedef double (* f3exp) (double x, double y, double z);
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| 147 |
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| 148 | //---------------------------------------------------------
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| 149 | #define FMXARG 3
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| 150 | class CE_FuncExp : public CExprBase {
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| 151 | public:
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| 152 | CE_FuncExp(string const & func);
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| 153 | virtual ~CE_FuncExp();
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| 154 | virtual double Evaluate() const ;
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| 155 | inline void AddArg(CExprBase * e);
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| 156 | virtual bool CheckE(string& errmsg) const;
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| 157 | virtual void Print(ostream& os) const;
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| 158 | protected:
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| 159 | f0exp _f0;
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| 160 | f1exp _f1;
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| 161 | f2exp _f2;
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| 162 | f3exp _f3;
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| 163 | int _ne, _maxne;
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| 164 | CExprBase * _e[FMXARG];
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| 165 | string _fname;
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| 166 | };
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| 167 |
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| 168 | //---------------------------------------------------------
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| 169 | CE_FuncExp::CE_FuncExp(string const & func)
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| 170 | {
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| 171 | _ne = 0; _maxne = -1;
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| 172 | for(int k=0; k<FMXARG; k++) _e[k] = NULL;
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| 173 | _f0 = NULL;
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| 174 | _f1 = NULL;
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| 175 | _f2 = NULL;
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| 176 | _f3 = NULL;
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| 177 | if (func == "sin") _f1 = sin;
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| 178 | else if (func == "cos") _f1 = cos;
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| 179 | else if (func == "tan") _f1 = tan;
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| 180 | else if (func == "asin") _f1 = asin;
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| 181 | else if (func == "acos") _f1 = acos;
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| 182 | else if (func == "atan") _f1 = atan;
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| 183 | else if (func == "atan2") _f2 = atan2;
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[2518] | 184 | else if (func == "sqrt") _f1 = sqrt;
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| 185 | else if (func == "fabs") _f1 = fabs;
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| 186 | else if (func == "floor") _f1 = floor;
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[2510] | 187 | else if (func == "exp") _f1 = exp;
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| 188 | else if (func == "log") _f1 = log;
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| 189 | else if (func == "log10") _f1 = log10;
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| 190 | else if (func == "pow") _f2 = pow;
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[2518] | 191 | else if (func == "hypot") _f2 = hypot;
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| 192 | else if (func == "sinh") _f1 = sinh;
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| 193 | else if (func == "cosh") _f1 = cosh;
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| 194 | else if (func == "tanh") _f1 = tanh;
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[2510] | 195 | else {
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| 196 | string errmsg = "CE_FuncExp::CE_FuncExp() - Uknown function " ;
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| 197 | errmsg += func;
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| 198 | throw CExprException(errmsg);
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| 199 | }
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| 200 | if (_f0) _maxne = 0;
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| 201 | else if (_f1) _maxne = 1;
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| 202 | else if (_f2) _maxne = 2;
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| 203 | else if (_f3) _maxne = 3;
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| 204 | _fname = func;
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| 205 | }
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| 206 |
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| 207 |
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| 208 | CE_FuncExp::~CE_FuncExp()
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| 209 | {
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| 210 | for(int k=0; k<FMXARG; k++) if (_e[k]) delete _e[k];
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| 211 | }
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| 212 |
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| 213 | void CE_FuncExp::AddArg(CExprBase * e)
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| 214 | {
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| 215 | if ((e != NULL) && (_ne < _maxne)) { _e[_ne] = e; _ne++; }
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| 216 | else throw CExprException("CE_FuncExp::AddArg() e=NULL or too many arguments ");
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| 217 | }
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| 218 |
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| 219 | double CE_FuncExp::Evaluate() const
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| 220 | {
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| 221 | if ((_ne != _maxne) || (_maxne < 1) ) {
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| 222 | throw CExprException("CE_FuncExp::Evaluate() - Wrong argument number ");
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| 223 | }
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| 224 | if (_ne == 1) return _f1(_e[0]->Evaluate());
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| 225 | else if (_ne == 2) return _f2(_e[0]->Evaluate(), _e[1]->Evaluate());
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| 226 | else if (_ne == 3) return _f3(_e[0]->Evaluate(), _e[1]->Evaluate(),
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| 227 | _e[2]->Evaluate());
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| 228 | else return 0.;
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| 229 | }
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| 230 |
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| 231 | bool CE_FuncExp::CheckE(string& errmsg) const
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| 232 | {
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| 233 | if ((_ne != _maxne) || (_maxne < 0) ) {
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| 234 | char buff[128];
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| 235 | sprintf(buff, "CE_FuncExp::CheckE() %s - Wrong argument number - ne=%d maxne=%d ",
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| 236 | _fname.c_str(), _ne, _maxne);
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| 237 | errmsg += buff;
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| 238 | return false;
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| 239 | }
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| 240 | return true;
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| 241 | }
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| 242 |
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| 243 | void CE_FuncExp::Print(ostream& os) const
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| 244 | {
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| 245 | if ((_ne != _maxne) || (_maxne < 1) )
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| 246 | os << _fname << "(ArgError)" ;
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| 247 | else {
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| 248 | if (_ne == 1) os << _fname << "(" << *(_e[0]) << ")";
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| 249 | else if (_ne == 2) os << _fname << "(" << *(_e[0]) << "," << *(_e[1]) << ")";
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| 250 | else if (_ne == 3) os << _fname << "(" << *(_e[0])
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| 251 | << "," << *(_e[1]) << "," << *(_e[2]) << ")";
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| 252 | }
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| 253 | }
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| 254 |
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| 255 | //---------------------------------------------------------
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| 256 | CExpressionEvaluator::CExpressionEvaluator(string const & sex)
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| 257 | {
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| 258 | _exp = NULL;
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| 259 | size_t off=0,stop=0;
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| 260 | string fname = "";
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| 261 | string errmsg;
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| 262 | _exp= ParseString(0,fname,sex,off,stop,errmsg);
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| 263 | if (_exp == NULL) throw CExprException(errmsg);
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| 264 | }
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| 265 |
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| 266 | CExpressionEvaluator::~CExpressionEvaluator()
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| 267 | {
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| 268 | if (_exp) delete _exp;
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| 269 | }
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| 270 |
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| 271 | double CExpressionEvaluator::Evaluate() const
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| 272 | {
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| 273 | if (_exp) return _exp->Evaluate();
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| 274 | else return 0.;
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| 275 | }
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| 276 |
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| 277 | void CExpressionEvaluator::Print(ostream& os) const
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| 278 | {
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| 279 | if (_exp) _exp->Print(os);
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| 280 | else os << "CExpressionEvaluator ???";
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| 281 | }
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| 282 |
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| 283 | // cette fonction rearrange le stack des operations binaires en attente
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| 284 | CExprBase* Arrange_CE_BinExpStack(stack<CE_BinExp* >& sbx, CExprBase* cex, CE_BinExp* nbx)
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| 285 | {
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| 286 | while ( !sbx.empty() && (nbx->Priority() <= sbx.top()->Priority()) ) {
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| 287 | sbx.top()->SetE2(cex);
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| 288 | cex = sbx.top(); sbx.pop();
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| 289 | }
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| 290 | nbx->SetE1(cex);
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| 291 | sbx.push(nbx);
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| 292 | return NULL;
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| 293 | }
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| 294 |
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| 295 | // cette fonction rearrange le stack des operations binaires en attente
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| 296 | CExprBase* Arrange_CE_BinExpStack(stack<CE_BinExp* >& sbx, CExprBase* cex)
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| 297 | {
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| 298 | if (sbx.empty()) return cex;
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| 299 | while ( !sbx.empty() ) {
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| 300 | sbx.top()->SetE2(cex);
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| 301 | cex = sbx.top(); sbx.pop();
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| 302 | }
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| 303 | return cex;
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| 304 | }
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| 305 |
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| 306 |
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| 307 | CExprBase* CExpressionEvaluator::ParseString(int extype, string fname, string const & sex,
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| 308 | size_t off, size_t& stop, string& errmsg)
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| 309 | {
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| 310 | size_t len = sex.length();
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| 311 | if (len < 1) {
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| 312 | string errmsg = "CExpressionEvaluator::ParseString() Empty expression";
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| 313 | throw CExprException(errmsg);
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| 314 | }
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[2515] | 315 | errmsg = "";
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[2510] | 316 | CExprBase* rx = NULL; // Expression resultat
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| 317 | stack< CE_BinExp* > sbx; // Stack des expressions binaires
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| 318 | CE_FuncExp* fx = NULL; // Expression fonction
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| 319 | CExprBase* cx = NULL; // Element d'expression (courante)
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| 320 |
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| 321 | if (extype == 2) fx = new CE_FuncExp(fname);
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| 322 |
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| 323 | size_t p=0, q=0;
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| 324 | char lastopc=0, opc=0; // Last/current operation sign (+,-,*,/,...)
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[2520] | 325 | int osn = 0;
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[2510] | 326 | bool finok = false;
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| 327 | bool fgcont = true;
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| 328 | bool checkok = true;
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| 329 | // cout << " DBG-ParseString off= " << off << " sex[off]= " << sex[off]
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| 330 | // << " extype= " << extype << endl;
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| 331 | p = stop = off;
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| 332 | while ((p < len) && (fgcont) && (checkok) ) {
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| 333 | // cout << " DBG-2-ParseString p=" << p << " q=" << q << endl;
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| 334 |
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| 335 | cx = NULL;
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| 336 | q = sex.find_first_of("+-*/(),",p);
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| 337 | if (q < len) { // operateur trouve
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| 338 | opc = sex[q]; // signe operateur courant
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| 339 | switch (opc) {
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| 340 | case '(' :
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| 341 | if (q == p) {
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| 342 | string fname = "";
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| 343 | cx = ParseString(1, fname, sex, q+1, stop, errmsg);
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| 344 | }
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| 345 | else cx = ParseString(2, sex.substr(p,q-p), sex, q+1, stop, errmsg);
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| 346 | if (!cx) { checkok = false; p = stop+1; }
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| 347 | else {
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[2550] | 348 | if (osn == 1) {
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| 349 | if (sex[p-osn] == '-') cx = new CE_ChsExp(cx);
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| 350 | }
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| 351 | if (osn > 1) {
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[2510] | 352 | checkok = false; p = stop+1; fgcont = false;
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| 353 | delete cx;
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[2550] | 354 | errmsg = "CExpressionEvaluator::ParseString()/ Syntax Error - multiple chs (+/-) (AA)";
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| 355 | }
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| 356 | else if (rx) {
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| 357 | checkok = false; p = stop+1; fgcont = false;
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| 358 | delete cx;
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[2510] | 359 | errmsg = "CExpressionEvaluator::ParseString()/ Syntax Error - rx&&cx (A)";
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| 360 | }
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| 361 | else {
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| 362 | if (stop == len-1) {
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| 363 | rx = Arrange_CE_BinExpStack(sbx, cx);
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| 364 | finok = true;
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| 365 | }
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| 366 | else rx = cx;
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[2520] | 367 | p = stop+1; osn = 0; lastopc = opc;
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[2510] | 368 | }
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| 369 | }
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| 370 | break;
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| 371 |
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| 372 | case ')' :
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| 373 | case ',' :
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| 374 | if (extype == 0) {
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| 375 | checkok = false; p = q; fgcont = false;
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| 376 | errmsg = "CExpressionEvaluator::ParseString() Unexpected ) or ,";
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| 377 | }
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| 378 | if ( (extype == 1) && (opc == ',')) {
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| 379 | checkok = false; p = q; fgcont = false;
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| 380 | errmsg = "CExpressionEvaluator::ParseString() Unexpected ,";
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| 381 | }
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| 382 | if ((q > p) && (rx)) {
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| 383 | checkok = false; p = q; fgcont = false;
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| 384 | errmsg = "CExpressionEvaluator::ParseString()/ Syntax Error - rx&&cx (B)";
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| 385 | }
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[2520] | 386 | if (q > p) cx = new CE_NumberExp(sex.substr(p-osn,q-p+osn));
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[2510] | 387 | else cx = rx;
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| 388 |
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| 389 | if (!cx) {
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| 390 | checkok = false; p = q; fgcont = false;
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| 391 | errmsg = "CExpressionEvaluator::ParseString()/ Syntax Error - farg=NULL (BB)";
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| 392 | }
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| 393 | else {
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| 394 | rx = Arrange_CE_BinExpStack(sbx, cx);
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| 395 | if (extype == 2) {
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| 396 | // cout << " DBG-ParseString-AddArg " << *(cx) << endl;
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| 397 | fx->AddArg(rx); rx = NULL;
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| 398 | }
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| 399 | if (opc == ')') { // Signe de fin de traitement d'une portion d'expression
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| 400 | if (extype == 2) { rx = fx; fx = NULL; }
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[2520] | 401 | stop = q; osn = 0; lastopc = opc;
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[2510] | 402 | fgcont = false;
|
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| 403 | finok = true;
|
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| 404 | }
|
---|
| 405 | else {
|
---|
| 406 | if (q == (len-1)) finok = true;
|
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[2520] | 407 | p = q+1; osn = 0; lastopc = opc;
|
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[2510] | 408 | }
|
---|
| 409 | }
|
---|
| 410 | break;
|
---|
| 411 |
|
---|
| 412 | case '+' :
|
---|
| 413 | case '-' :
|
---|
| 414 | case '*' :
|
---|
| 415 | case '/' :
|
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[2520] | 416 | if (!( ((opc=='+')||(opc=='-')) && ( (q==off) || ( (q==p) && lastopc != '(') ) ) ) {
|
---|
[2510] | 417 | CE_BinExp* nbx;
|
---|
[2515] | 418 | if (opc == '+') nbx = new CE_AddExp;
|
---|
| 419 | else if (opc == '-') nbx = new CE_SubExp;
|
---|
| 420 | else if (opc == '*') nbx = new CE_MulExp;
|
---|
| 421 | else nbx = new CE_DivExp;
|
---|
[2510] | 422 | if ((p == q) && (rx == NULL)) {
|
---|
[2520] | 423 | checkok = false; p = q; osn = 0; fgcont = false;
|
---|
[2510] | 424 | delete nbx;
|
---|
| 425 | errmsg = "CExpressionEvaluator::ParseString() Syntax Error - rx==NULL (C)";
|
---|
| 426 | }
|
---|
| 427 | else {
|
---|
| 428 | if (p == q) cx = rx;
|
---|
[2520] | 429 | else cx = new CE_NumberExp(sex.substr(p-osn,q-p+osn));
|
---|
[2510] | 430 | rx = Arrange_CE_BinExpStack(sbx, cx, nbx);
|
---|
[2520] | 431 | p = q+1; osn = 0; lastopc = opc;
|
---|
[2510] | 432 | }
|
---|
| 433 | }
|
---|
[2520] | 434 | else {
|
---|
| 435 | // Traitement des signes +/- qui pourrait faire partie d'une constante numerique
|
---|
| 436 | p = q+1; osn++;
|
---|
| 437 | continue;
|
---|
| 438 | }
|
---|
[2510] | 439 | break;
|
---|
| 440 | default:
|
---|
| 441 | throw CExprException("CExpressionEvaluator::ParseString() BUG-BUG-BUG");
|
---|
| 442 | break;
|
---|
| 443 | } // Fin de switch
|
---|
| 444 | }
|
---|
| 445 | else { // dernier element
|
---|
| 446 | if ( (p<len) && (rx != NULL)) {
|
---|
| 447 | checkok = false; p = len-1; fgcont = false;
|
---|
| 448 | errmsg = "CExpressionEvaluator::ParseString() Syntax Error - rx!=NULL at end (D)";
|
---|
| 449 | }
|
---|
| 450 | else {
|
---|
[2520] | 451 | if (p<len) cx = new CE_NumberExp(sex.substr(p-osn));
|
---|
[2510] | 452 | else cx = rx;
|
---|
| 453 | rx = Arrange_CE_BinExpStack(sbx, cx);
|
---|
| 454 | stop = p = len; fgcont = false;
|
---|
| 455 | finok = true;
|
---|
| 456 | }
|
---|
| 457 | }
|
---|
| 458 | }
|
---|
| 459 | // cout << " DBG-ParseString-out stop= " << stop << " sex[stop]= " << sex[stop] << endl;
|
---|
| 460 | if (finok && checkok) {
|
---|
| 461 | if( !sbx.empty() ) {
|
---|
| 462 | checkok = false;
|
---|
| 463 | errmsg = "CExpressionEvaluator::ParseString() !sbx.empty() at the end (E)";
|
---|
| 464 | }
|
---|
| 465 | else {
|
---|
| 466 | checkok = rx->CheckE(errmsg);
|
---|
| 467 | }
|
---|
| 468 | }
|
---|
| 469 | if (!finok || !checkok || !rx) {
|
---|
| 470 | char buff[128];
|
---|
| 471 | if (errmsg.length() < 1) {
|
---|
| 472 | errmsg = "CExpressionEvaluator::ParseString() Error - " ;
|
---|
| 473 | if (!finok) errmsg += " !finok " ;
|
---|
| 474 | if (!checkok) errmsg += " !checkok " ;
|
---|
| 475 | if (!rx) errmsg += " !rx " ;
|
---|
| 476 | errmsg += " (F)";
|
---|
| 477 | }
|
---|
| 478 | sprintf(buff,"\n CExprError... S=[%s] (p=%ld , len=%ld)", sex.c_str(), (long)p,(long)len);
|
---|
| 479 | errmsg += buff;
|
---|
| 480 | if (rx) delete rx;
|
---|
| 481 | rx = NULL;
|
---|
| 482 | while (!sbx.empty()) {
|
---|
| 483 | delete sbx.top();
|
---|
| 484 | sbx.pop();
|
---|
| 485 | }
|
---|
| 486 | }
|
---|
| 487 | if (fx) delete fx;
|
---|
| 488 | return rx;
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 | } // End of namespace SOPHYA
|
---|
| 492 |
|
---|