| Geant4 Cross Reference |
1 // -*- C++ -*- 1 // -*- C++ -*-
2 // ------------------------------------------- 2 // ---------------------------------------------------------------------------
3 3
4 #include "CLHEP/Evaluator/Evaluator.h" 4 #include "CLHEP/Evaluator/Evaluator.h"
5 5
6 #include <iostream> 6 #include <iostream>
7 #include <sstream> 7 #include <sstream>
8 #include <string> 8 #include <string>
9 #include <cmath> // for std::pow() 9 #include <cmath> // for std::pow()
10 #include <stack> 10 #include <stack>
11 #include <unordered_map> 11 #include <unordered_map>
12 #include <string.h> 12 #include <string.h>
13 #include <ctype.h> 13 #include <ctype.h>
14 #include <errno.h> 14 #include <errno.h>
15 #include <stdlib.h> // for strtod() 15 #include <stdlib.h> // for strtod()
16 16
17 using std::string; 17 using std::string;
18 using std::stack; 18 using std::stack;
19 19
20 //-------------------------------------------- 20 //---------------------------------------------------------------------------
21 // Fix non ISO C++ compliant cast from pointer 21 // Fix non ISO C++ compliant cast from pointer to function
22 // to void*, which is a pointer to an object 22 // to void*, which is a pointer to an object
23 typedef void (*voidfuncptr)(); 23 typedef void (*voidfuncptr)();
24 struct Item { 24 struct Item {
25 enum { UNKNOWN, VARIABLE, EXPRESSION, FUNCTI 25 enum { UNKNOWN, VARIABLE, EXPRESSION, FUNCTION } what;
26 double variable; 26 double variable;
27 string expression; 27 string expression;
28 // Fix non ISO C++ compliant cast from point 28 // Fix non ISO C++ compliant cast from pointer to function
29 // to void*, which is a pointer to an object 29 // to void*, which is a pointer to an object
30 //void *function; 30 //void *function;
31 voidfuncptr function; 31 voidfuncptr function;
32 32
33 Item() : what(UNKNOWN), variable(0 33 Item() : what(UNKNOWN), variable(0),expression(), function(0) {}
34 Item(double x) : what(VARIABLE), variable(x 34 Item(double x) : what(VARIABLE), variable(x),expression(), function(0) {}
35 Item(string x) : what(EXPRESSION),variable(0 35 Item(string x) : what(EXPRESSION),variable(0),expression(x),function(0) {}
36 Item(voidfuncptr x) : what(FUNCTION), varia 36 Item(voidfuncptr x) : what(FUNCTION), variable(0),expression(), function(x) {}
37 }; 37 };
38 38
39 using pchar = char *; 39 using pchar = char *;
40 using dic_type = std::unordered_map<string, It 40 using dic_type = std::unordered_map<string, Item>;
41 41
42 struct Struct { 42 struct Struct {
43 dic_type theDictionary; 43 dic_type theDictionary;
44 pchar theExpression; 44 pchar theExpression;
45 pchar thePosition; 45 pchar thePosition;
46 int theStatus; 46 int theStatus;
47 double theResult; 47 double theResult;
48 }; 48 };
49 49
50 //-------------------------------------------- 50 //---------------------------------------------------------------------------
51 #define EVAL HepTool::Evaluator 51 #define EVAL HepTool::Evaluator
52 52
53 #define REMOVE_BLANKS \ 53 #define REMOVE_BLANKS \
54 for(pointer=name;;pointer++) if (!isspace(*poi 54 for(pointer=name;;pointer++) if (!isspace(*pointer)) break; \
55 for(n=(int)strlen(pointer);n>0;n--) if (!isspa 55 for(n=(int)strlen(pointer);n>0;n--) if (!isspace(*(pointer+n-1))) break
56 56
57 #define SKIP_BLANKS \ 57 #define SKIP_BLANKS \
58 for(;;pointer++) { \ 58 for(;;pointer++) { \
59 c = (pointer > end) ? '\0' : *pointer; \ 59 c = (pointer > end) ? '\0' : *pointer; \
60 if (!isspace(c)) break; \ 60 if (!isspace(c)) break; \
61 } 61 }
62 62
63 #define EVAL_EXIT(STATUS,POSITION) endp = POSI 63 #define EVAL_EXIT(STATUS,POSITION) endp = POSITION; return STATUS
64 #define MAX_N_PAR 5 64 #define MAX_N_PAR 5
65 65
66 static const char sss[MAX_N_PAR+2] = "012345"; 66 static const char sss[MAX_N_PAR+2] = "012345";
67 67
68 enum { ENDL, LBRA, OR, AND, EQ, NE, GE, GT, LE 68 enum { ENDL, LBRA, OR, AND, EQ, NE, GE, GT, LE, LT,
69 PLUS, MINUS, UNARY_PLUS, UNARY_MINUS, M 69 PLUS, MINUS, UNARY_PLUS, UNARY_MINUS, MULT, DIV, POW, RBRA, VALUE };
70 70
71 static int engine(pchar, pchar, double &, pcha 71 static int engine(pchar, pchar, double &, pchar &, const dic_type &);
72 72
73 static int variable(const string & name, doubl 73 static int variable(const string & name, double & result,
74 const dic_type & dictionary) 74 const dic_type & dictionary)
75 /********************************************* 75 /***********************************************************************
76 * 76 * *
77 * Name: variable 77 * Name: variable Date: 03.10.00 *
78 * Author: Evgeni Chernyaev 78 * Author: Evgeni Chernyaev Revised: *
79 * 79 * *
80 * Function: Finds value of the variable. 80 * Function: Finds value of the variable. *
81 * This function is used by operand( 81 * This function is used by operand(). *
82 * 82 * *
83 * Parameters: 83 * Parameters: *
84 * name - name of the variable. 84 * name - name of the variable. *
85 * result - value of the variable. 85 * result - value of the variable. *
86 * dictionary - dictionary of available vari 86 * dictionary - dictionary of available variables and functions. *
87 * 87 * *
88 ********************************************* 88 ***********************************************************************/
89 { 89 {
90 dic_type::const_iterator iter = dictionary.f 90 dic_type::const_iterator iter = dictionary.find(name);
91 if (iter == dictionary.end()) 91 if (iter == dictionary.end())
92 return EVAL::ERROR_UNKNOWN_VARIABLE; 92 return EVAL::ERROR_UNKNOWN_VARIABLE;
93 Item item = iter->second; 93 Item item = iter->second;
94 switch (item.what) { 94 switch (item.what) {
95 case Item::VARIABLE: 95 case Item::VARIABLE:
96 result = item.variable; 96 result = item.variable;
97 return EVAL::OK; 97 return EVAL::OK;
98 case Item::EXPRESSION: { 98 case Item::EXPRESSION: {
99 pchar exp_begin = (char *)(item.expression 99 pchar exp_begin = (char *)(item.expression.c_str());
100 pchar exp_end = exp_begin + strlen(exp_b 100 pchar exp_end = exp_begin + strlen(exp_begin) - 1;
101 if (engine(exp_begin, exp_end, result, exp 101 if (engine(exp_begin, exp_end, result, exp_end, dictionary) == EVAL::OK)
102 return EVAL::OK; 102 return EVAL::OK;
103 else 103 else
104 return EVAL::ERROR_CALCULATION_ERROR; 104 return EVAL::ERROR_CALCULATION_ERROR;
105 } 105 }
106 default: 106 default:
107 return EVAL::ERROR_CALCULATION_ERROR; 107 return EVAL::ERROR_CALCULATION_ERROR;
108 } 108 }
109 } 109 }
110 110
111 static int function(const string & name, stack 111 static int function(const string & name, stack<double> & par,
112 double & result, const dic_type & dict 112 double & result, const dic_type & dictionary)
113 /********************************************* 113 /***********************************************************************
114 * 114 * *
115 * Name: function 115 * Name: function Date: 03.10.00 *
116 * Author: Evgeni Chernyaev 116 * Author: Evgeni Chernyaev Revised: *
117 * 117 * *
118 * Function: Finds value of the function. 118 * Function: Finds value of the function. *
119 * This function is used by operand( 119 * This function is used by operand(). *
120 * 120 * *
121 * Parameters: 121 * Parameters: *
122 * name - name of the function. 122 * name - name of the function. *
123 * par - stack of parameters. 123 * par - stack of parameters. *
124 * result - value of the function. 124 * result - value of the function. *
125 * dictionary - dictionary of available vari 125 * dictionary - dictionary of available variables and functions. *
126 * 126 * *
127 ********************************************* 127 ***********************************************************************/
128 { 128 {
129 unsigned long npar = par.size(); 129 unsigned long npar = par.size();
130 if (npar > MAX_N_PAR) return EVAL::ERROR_UNK 130 if (npar > MAX_N_PAR) return EVAL::ERROR_UNKNOWN_FUNCTION;
131 131
132 dic_type::const_iterator iter = dictionary.f 132 dic_type::const_iterator iter = dictionary.find(sss[npar]+name);
133 if (iter == dictionary.end()) return EVAL::E 133 if (iter == dictionary.end()) return EVAL::ERROR_UNKNOWN_FUNCTION;
134 Item item = iter->second; 134 Item item = iter->second;
135 135
136 double pp[MAX_N_PAR] = {0.0}; 136 double pp[MAX_N_PAR] = {0.0};
137 for(unsigned long i=0; i<npar; ++i) { pp[i] 137 for(unsigned long i=0; i<npar; ++i) { pp[i] = par.top(); par.pop(); }
138 errno = 0; 138 errno = 0;
139 if (item.function == 0) return EVAL::E 139 if (item.function == 0) return EVAL::ERROR_CALCULATION_ERROR;
140 switch (npar) { 140 switch (npar) {
141 case 0: 141 case 0:
142 result = ((double (*)())item.function)(); 142 result = ((double (*)())item.function)();
143 break; 143 break;
144 case 1: 144 case 1:
145 result = ((double (*)(double))item.functio 145 result = ((double (*)(double))item.function)(pp[0]);
146 break; 146 break;
147 case 2: 147 case 2:
148 result = ((double (*)(double,double))item. 148 result = ((double (*)(double,double))item.function)(pp[1], pp[0]);
149 break; 149 break;
150 case 3: 150 case 3:
151 result = ((double (*)(double,double,double 151 result = ((double (*)(double,double,double))item.function)
152 (pp[2],pp[1],pp[0]); 152 (pp[2],pp[1],pp[0]);
153 break; 153 break;
154 case 4: 154 case 4:
155 result = ((double (*)(double,double,double 155 result = ((double (*)(double,double,double,double))item.function)
156 (pp[3],pp[2],pp[1],pp[0]); 156 (pp[3],pp[2],pp[1],pp[0]);
157 break; 157 break;
158 case 5: 158 case 5:
159 result = ((double (*)(double,double,double 159 result = ((double (*)(double,double,double,double,double))item.function)
160 (pp[4],pp[3],pp[2],pp[1],pp[0]); 160 (pp[4],pp[3],pp[2],pp[1],pp[0]);
161 break; 161 break;
162 } 162 }
163 return (errno == 0) ? EVAL::OK : EVAL::ERROR 163 return (errno == 0) ? EVAL::OK : EVAL::ERROR_CALCULATION_ERROR;
164 } 164 }
165 165
166 static int operand(pchar begin, pchar end, dou 166 static int operand(pchar begin, pchar end, double & result,
167 pchar & endp, const dic_type & dictiona 167 pchar & endp, const dic_type & dictionary)
168 /********************************************* 168 /***********************************************************************
169 * 169 * *
170 * Name: operand 170 * Name: operand Date: 03.10.00 *
171 * Author: Evgeni Chernyaev 171 * Author: Evgeni Chernyaev Revised: *
172 * 172 * *
173 * Function: Finds value of the operand. The o 173 * Function: Finds value of the operand. The operand can be either *
174 * a number or a variable or a funct 174 * a number or a variable or a function. *
175 * This function is used by engine() 175 * This function is used by engine(). *
176 * 176 * *
177 * Parameters: 177 * Parameters: *
178 * begin - pointer to the first character o 178 * begin - pointer to the first character of the operand. *
179 * end - pointer to the last character of 179 * end - pointer to the last character of the character string. *
180 * result - value of the operand. 180 * result - value of the operand. *
181 * endp - pointer to the character where t 181 * endp - pointer to the character where the evaluation stoped. *
182 * dictionary - dictionary of available vari 182 * dictionary - dictionary of available variables and functions. *
183 * 183 * *
184 ********************************************* 184 ***********************************************************************/
185 { 185 {
186 pchar pointer = begin; 186 pchar pointer = begin;
187 int EVAL_STATUS; 187 int EVAL_STATUS;
188 char c; 188 char c;
189 189
190 // G E T N U M B E R 190 // G E T N U M B E R
191 191
192 if (!isalpha(*pointer)) { 192 if (!isalpha(*pointer)) {
193 errno = 0; 193 errno = 0;
194 result = strtod(pointer, (char **)(&pointe 194 result = strtod(pointer, (char **)(&pointer));
195 if (errno == 0) { 195 if (errno == 0) {
196 EVAL_EXIT( EVAL::OK, --pointer ); 196 EVAL_EXIT( EVAL::OK, --pointer );
197 }else{ 197 }else{
198 EVAL_EXIT( EVAL::ERROR_CALCULATION_ERROR 198 EVAL_EXIT( EVAL::ERROR_CALCULATION_ERROR, begin );
199 } 199 }
200 } 200 }
201 201
202 // G E T N A M E 202 // G E T N A M E
203 203
204 while(pointer <= end) { 204 while(pointer <= end) {
205 c = *pointer; 205 c = *pointer;
206 if (c != '_' && !isalnum(c)) break; 206 if (c != '_' && !isalnum(c)) break;
207 pointer++; 207 pointer++;
208 } 208 }
209 c = *pointer; 209 c = *pointer;
210 *pointer = '\0'; 210 *pointer = '\0';
211 string name(begin); 211 string name(begin);
212 *pointer = c; 212 *pointer = c;
213 213
214 // G E T V A R I A B L E 214 // G E T V A R I A B L E
215 215
216 result = 0.0; 216 result = 0.0;
217 SKIP_BLANKS; 217 SKIP_BLANKS;
218 if (c != '(') { 218 if (c != '(') {
219 EVAL_STATUS = variable(name, result, dicti 219 EVAL_STATUS = variable(name, result, dictionary);
220 EVAL_EXIT( EVAL_STATUS, (EVAL_STATUS == EV 220 EVAL_EXIT( EVAL_STATUS, (EVAL_STATUS == EVAL::OK) ? --pointer : begin);
221 } 221 }
222 222
223 // G E T F U N C T I O N 223 // G E T F U N C T I O N
224 224
225 stack<pchar> pos; // positio 225 stack<pchar> pos; // position stack
226 stack<double> par; // paramet 226 stack<double> par; // parameter stack
227 double value; 227 double value;
228 pchar par_begin = pointer+1, par_end 228 pchar par_begin = pointer+1, par_end;
229 229
230 for(;;pointer++) { 230 for(;;pointer++) {
231 c = (pointer > end) ? '\0' : *pointer; 231 c = (pointer > end) ? '\0' : *pointer;
232 switch (c) { 232 switch (c) {
233 case '\0': 233 case '\0':
234 EVAL_EXIT( EVAL::ERROR_UNPAIRED_PARENTHE 234 EVAL_EXIT( EVAL::ERROR_UNPAIRED_PARENTHESIS, pos.top() );
235 case '(': 235 case '(':
236 pos.push(pointer); break; 236 pos.push(pointer); break;
237 case ',': 237 case ',':
238 if (pos.size() == 1) { 238 if (pos.size() == 1) {
239 par_end = pointer-1; 239 par_end = pointer-1;
240 EVAL_STATUS = engine(par_begin, par_end, val 240 EVAL_STATUS = engine(par_begin, par_end, value, par_end, dictionary);
241 if (EVAL_STATUS == EVAL::WARNING_BLANK_STRIN 241 if (EVAL_STATUS == EVAL::WARNING_BLANK_STRING)
242 { EVAL_EXIT( EVAL::ERROR_EMPTY_PARAMETER, 242 { EVAL_EXIT( EVAL::ERROR_EMPTY_PARAMETER, --par_end ); }
243 if (EVAL_STATUS != EVAL::OK) 243 if (EVAL_STATUS != EVAL::OK)
244 { EVAL_EXIT( EVAL_STATUS, par_end ); } 244 { EVAL_EXIT( EVAL_STATUS, par_end ); }
245 par.push(value); 245 par.push(value);
246 par_begin = pointer + 1; 246 par_begin = pointer + 1;
247 } 247 }
248 break; 248 break;
249 case ')': 249 case ')':
250 if (pos.size() > 1) { 250 if (pos.size() > 1) {
251 pos.pop(); 251 pos.pop();
252 break; 252 break;
253 }else{ 253 }else{
254 par_end = pointer-1; 254 par_end = pointer-1;
255 EVAL_STATUS = engine(par_begin, par_end, val 255 EVAL_STATUS = engine(par_begin, par_end, value, par_end, dictionary);
256 switch (EVAL_STATUS) { 256 switch (EVAL_STATUS) {
257 case EVAL::OK: 257 case EVAL::OK:
258 par.push(value); 258 par.push(value);
259 break; 259 break;
260 case EVAL::WARNING_BLANK_STRING: 260 case EVAL::WARNING_BLANK_STRING:
261 if (par.size() != 0) 261 if (par.size() != 0)
262 { EVAL_EXIT( EVAL::ERROR_EMPTY_PARAMETER 262 { EVAL_EXIT( EVAL::ERROR_EMPTY_PARAMETER, --par_end ); }
263 break; 263 break;
264 default: 264 default:
265 EVAL_EXIT( EVAL_STATUS, par_end ); 265 EVAL_EXIT( EVAL_STATUS, par_end );
266 } 266 }
267 EVAL_STATUS = function(name, par, result, di 267 EVAL_STATUS = function(name, par, result, dictionary);
268 EVAL_EXIT( EVAL_STATUS, (EVAL_STATUS == EVAL 268 EVAL_EXIT( EVAL_STATUS, (EVAL_STATUS == EVAL::OK) ? pointer : begin);
269 } 269 }
270 } 270 }
271 } 271 }
272 } 272 }
273 273
274 /********************************************* 274 /***********************************************************************
275 * 275 * *
276 * Name: maker 276 * Name: maker Date: 28.09.00 *
277 * Author: Evgeni Chernyaev 277 * Author: Evgeni Chernyaev Revised: *
278 * 278 * *
279 * Function: Executes basic arithmetic operati 279 * Function: Executes basic arithmetic operations on values in the top *
280 * of the stack. Result is placed ba 280 * of the stack. Result is placed back into the stack. *
281 * This function is used by engine() 281 * This function is used by engine(). *
282 * 282 * *
283 * Parameters: 283 * Parameters: *
284 * op - code of the operation. 284 * op - code of the operation. *
285 * val - stack of values. 285 * val - stack of values. *
286 * 286 * *
287 ********************************************* 287 ***********************************************************************/
288 static int maker(int op, stack<double> & val) 288 static int maker(int op, stack<double> & val)
289 { 289 {
290 if (val.size() < 2) return EVAL::ERROR_SYNTA 290 if (val.size() < 2) return EVAL::ERROR_SYNTAX_ERROR;
291 double val2 = val.top(); val.pop(); 291 double val2 = val.top(); val.pop();
292 double val1 = val.top(); 292 double val1 = val.top();
293 switch (op) { 293 switch (op) {
294 case OR: // o 294 case OR: // operator ||
295 val.top() = (val1 || val2) ? 1. : 0.; 295 val.top() = (val1 || val2) ? 1. : 0.;
296 return EVAL::OK; 296 return EVAL::OK;
297 case AND: // o 297 case AND: // operator &&
298 val.top() = (val1 && val2) ? 1. : 0.; 298 val.top() = (val1 && val2) ? 1. : 0.;
299 return EVAL::OK; 299 return EVAL::OK;
300 case EQ: // o 300 case EQ: // operator ==
301 val.top() = (val1 == val2) ? 1. : 0.; 301 val.top() = (val1 == val2) ? 1. : 0.;
302 return EVAL::OK; 302 return EVAL::OK;
303 case NE: // o 303 case NE: // operator !=
304 val.top() = (val1 != val2) ? 1. : 0.; 304 val.top() = (val1 != val2) ? 1. : 0.;
305 return EVAL::OK; 305 return EVAL::OK;
306 case GE: // o 306 case GE: // operator >=
307 val.top() = (val1 >= val2) ? 1. : 0.; 307 val.top() = (val1 >= val2) ? 1. : 0.;
308 return EVAL::OK; 308 return EVAL::OK;
309 case GT: // o 309 case GT: // operator >
310 val.top() = (val1 > val2) ? 1. : 0.; 310 val.top() = (val1 > val2) ? 1. : 0.;
311 return EVAL::OK; 311 return EVAL::OK;
312 case LE: // o 312 case LE: // operator <=
313 val.top() = (val1 <= val2) ? 1. : 0.; 313 val.top() = (val1 <= val2) ? 1. : 0.;
314 return EVAL::OK; 314 return EVAL::OK;
315 case LT: // o 315 case LT: // operator <
316 val.top() = (val1 < val2) ? 1. : 0.; 316 val.top() = (val1 < val2) ? 1. : 0.;
317 return EVAL::OK; 317 return EVAL::OK;
318 case PLUS: // o 318 case PLUS: // operator '+'
319 val.top() = val1 + val2; 319 val.top() = val1 + val2;
320 return EVAL::OK; 320 return EVAL::OK;
321 case MINUS: // o 321 case MINUS: // operator '-'
322 val.top() = val1 - val2; 322 val.top() = val1 - val2;
323 return EVAL::OK; 323 return EVAL::OK;
324 case MULT: // o 324 case MULT: // operator '*'
325 val.top() = val1 * val2; 325 val.top() = val1 * val2;
326 return EVAL::OK; 326 return EVAL::OK;
327 case DIV: // o 327 case DIV: // operator '/'
328 if (val2 == 0.0) return EVAL::ERROR_CALCUL 328 if (val2 == 0.0) return EVAL::ERROR_CALCULATION_ERROR;
329 val.top() = val1 / val2; 329 val.top() = val1 / val2;
330 return EVAL::OK; 330 return EVAL::OK;
331 case POW: // o 331 case POW: // operator '^' (or '**')
332 errno = 0; 332 errno = 0;
333 val.top() = std::pow(val1,val2); 333 val.top() = std::pow(val1,val2);
334 if (errno == 0) return EVAL::OK; 334 if (errno == 0) return EVAL::OK;
335 else return EVAL::ERROR_CALCULATION_ERROR; 335 else return EVAL::ERROR_CALCULATION_ERROR;
336 case UNARY_PLUS: 336 case UNARY_PLUS: // unary operator '+'
337 val.top() = val1 + val2; // val1 is z 337 val.top() = val1 + val2; // val1 is zero
338 return EVAL::OK; 338 return EVAL::OK;
339 case UNARY_MINUS: 339 case UNARY_MINUS: // unary operator '-'
340 val.top() = val1 - val2; // val1 is z 340 val.top() = val1 - val2; // val1 is zero
341 return EVAL::OK; 341 return EVAL::OK;
342 default: 342 default:
343 return EVAL::ERROR_CALCULATION_ERROR; 343 return EVAL::ERROR_CALCULATION_ERROR;
344 } 344 }
345 } 345 }
346 346
347 /********************************************* 347 /***********************************************************************
348 * 348 * *
349 * Name: engine 349 * Name: engine Date: 28.09.00 *
350 * Author: Evgeni Chernyaev 350 * Author: Evgeni Chernyaev Revised: *
351 * 351 * *
352 * Function: Evaluates arithmetic expression. 352 * Function: Evaluates arithmetic expression. *
353 * 353 * *
354 * Parameters: 354 * Parameters: *
355 * begin - pointer to the character string 355 * begin - pointer to the character string with expression. *
356 * end - pointer to the end of the charac 356 * end - pointer to the end of the character string (it is needed *
357 * for recursive call of engine(), 357 * for recursive call of engine(), when there is no '\0'). *
358 * result - result of the evaluation. 358 * result - result of the evaluation. *
359 * endp - pointer to the character where t 359 * endp - pointer to the character where the evaluation stoped. *
360 * dictionary - dictionary of available vari 360 * dictionary - dictionary of available variables and functions. *
361 * 361 * *
362 ********************************************* 362 ***********************************************************************/
363 static int engine(pchar begin, pchar end, doub 363 static int engine(pchar begin, pchar end, double & result,
364 pchar & endp, const dic_type & dictionar 364 pchar & endp, const dic_type & dictionary)
365 { 365 {
366 enum SyntaxTableEntry { 366 enum SyntaxTableEntry {
367 SyntaxError = 0, 367 SyntaxError = 0,
368 NumberVariableOrFunction = 1, 368 NumberVariableOrFunction = 1,
369 UnaryPlusOrMinus = 2, 369 UnaryPlusOrMinus = 2,
370 AnyOperator = 3 370 AnyOperator = 3
371 }; 371 };
372 static const int SyntaxTable[19][19] = { 372 static const int SyntaxTable[19][19] = {
373 //E ( || && == != >= > <= < + - u+ u 373 //E ( || && == != >= > <= < + - u+ u- * / ^ ) V - current token
374 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 374 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // E - previous
375 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 375 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // ( token
376 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 376 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // ||
377 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 377 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // &&
378 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 378 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // ==
379 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 379 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // !=
380 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 380 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // >=
381 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 381 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // >
382 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 382 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // <=
383 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 383 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // <
384 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 384 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // +
385 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 385 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // -
386 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 386 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // unary +
387 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 387 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // unary -
388 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 388 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // *
389 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 389 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // /
390 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 390 { 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 1 }, // ^
391 { 3, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 391 { 3, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0 }, // )
392 { 3, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 392 { 3, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0 } // V = {.,N,C}
393 }; 393 };
394 enum ActionTableEntry { 394 enum ActionTableEntry {
395 UnbalancedParentheses = -1, 395 UnbalancedParentheses = -1,
396 ExpressionCompleted = 0, 396 ExpressionCompleted = 0,
397 HigherPrecedenceOperator = 1, 397 HigherPrecedenceOperator = 1,
398 SamePrecedenceOperator = 2, 398 SamePrecedenceOperator = 2,
399 CloseProcessedParenthesesOrExpression = 3, 399 CloseProcessedParenthesesOrExpression = 3,
400 LowerPrecedenceOperator = 4 400 LowerPrecedenceOperator = 4
401 }; 401 };
402 static const int ActionTable[17][18] = { 402 static const int ActionTable[17][18] = {
403 //E ( || && == != >= > <= < + - u+ u 403 //E ( || && == != >= > <= < + - u+ u- * / ^ ) - current operator
404 { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 404 { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,-1 }, // E - top operator
405 {-1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 405 {-1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3 }, // ( in stack
406 { 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 406 { 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4 }, // ||
407 { 4, 1, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 407 { 4, 1, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4 }, // &&
408 { 4, 1, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1 408 { 4, 1, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4 }, // ==
409 { 4, 1, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1 409 { 4, 1, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4 }, // !=
410 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1 410 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 4 }, // >=
411 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1 411 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 4 }, // >
412 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1 412 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 4 }, // <=
413 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1 413 { 4, 1, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 4 }, // <
414 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1 414 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 4 }, // +
415 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1 415 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 4 }, // -
416 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 416 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 4, 4, 1, 4 }, // unary +
417 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 417 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 4, 4, 1, 4 }, // unary -
418 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 418 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 2, 2, 1, 4 }, // *
419 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 419 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 2, 2, 1, 4 }, // /
420 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 420 { 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 4, 4, 4, 4 } // ^
421 }; 421 };
422 422
423 stack<int> op; // op 423 stack<int> op; // operator stack
424 stack<pchar> pos; // po 424 stack<pchar> pos; // position stack
425 stack<double> val; // va 425 stack<double> val; // value stack
426 double value; 426 double value;
427 pchar pointer = begin; 427 pchar pointer = begin;
428 int iWhat, iCur, iPrev = 0, iTop, 428 int iWhat, iCur, iPrev = 0, iTop, EVAL_STATUS;
429 char c; 429 char c;
430 430
431 op.push(0); pos.push(pointer); // pu 431 op.push(0); pos.push(pointer); // push EOL to the stack
432 SKIP_BLANKS; 432 SKIP_BLANKS;
433 if (c == '\0') { EVAL_EXIT( EVAL::WARNING_BL 433 if (c == '\0') { EVAL_EXIT( EVAL::WARNING_BLANK_STRING, begin ); }
434 for(;;pointer++) { 434 for(;;pointer++) {
435 435
436 // N E X T T O K E N 436 // N E X T T O K E N
437 437
438 c = (pointer > end) ? '\0' : *pointer; 438 c = (pointer > end) ? '\0' : *pointer;
439 if (isspace(c)) continue; // sk 439 if (isspace(c)) continue; // skip space, tab etc.
440 switch (c) { 440 switch (c) {
441 case '\0': iCur = ENDL; break; 441 case '\0': iCur = ENDL; break;
442 case '(': iCur = LBRA; break; 442 case '(': iCur = LBRA; break;
443 case '|': 443 case '|':
444 if (*(pointer+1) == '|') { 444 if (*(pointer+1) == '|') {
445 pointer++; iCur = OR; break; 445 pointer++; iCur = OR; break;
446 }else{ 446 }else{
447 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMB 447 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMBOL, pointer );
448 } 448 }
449 case '&': 449 case '&':
450 if (*(pointer+1) == '&') { 450 if (*(pointer+1) == '&') {
451 pointer++; iCur = AND; break; 451 pointer++; iCur = AND; break;
452 }else{ 452 }else{
453 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMB 453 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMBOL, pointer );
454 } 454 }
455 case '=': 455 case '=':
456 if (*(pointer+1) == '=') { 456 if (*(pointer+1) == '=') {
457 pointer++; iCur = EQ; break; 457 pointer++; iCur = EQ; break;
458 }else{ 458 }else{
459 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMB 459 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMBOL, pointer );
460 } 460 }
461 case '!': 461 case '!':
462 if (*(pointer+1) == '=') { 462 if (*(pointer+1) == '=') {
463 pointer++; iCur = NE; break; 463 pointer++; iCur = NE; break;
464 }else{ 464 }else{
465 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMB 465 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMBOL, pointer );
466 } 466 }
467 case '>': 467 case '>':
468 if (*(pointer+1) == '=') { pointer++; iC 468 if (*(pointer+1) == '=') { pointer++; iCur = GE; } else { iCur = GT; }
469 break; 469 break;
470 case '<': 470 case '<':
471 if (*(pointer+1) == '=') { pointer++; iC 471 if (*(pointer+1) == '=') { pointer++; iCur = LE; } else { iCur = LT; }
472 break; 472 break;
473 case '+': iCur = PLUS; break; 473 case '+': iCur = PLUS; break;
474 case '-': iCur = MINUS; break; 474 case '-': iCur = MINUS; break;
475 case '*': 475 case '*':
476 if (*(pointer+1) == '*') { pointer++; iC 476 if (*(pointer+1) == '*') { pointer++; iCur = POW; }else{ iCur = MULT; }
477 break; 477 break;
478 case '/': iCur = DIV; break; 478 case '/': iCur = DIV; break;
479 case '^': iCur = POW; break; 479 case '^': iCur = POW; break;
480 case ')': iCur = RBRA; break; 480 case ')': iCur = RBRA; break;
481 default: 481 default:
482 if (c == '.' || isalnum(c)) { 482 if (c == '.' || isalnum(c)) {
483 iCur = VALUE; break; 483 iCur = VALUE; break;
484 }else{ 484 }else{
485 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMB 485 EVAL_EXIT( EVAL::ERROR_UNEXPECTED_SYMBOL, pointer );
486 } 486 }
487 } 487 }
488 488
489 // S Y N T A X A N A L I S Y S 489 // S Y N T A X A N A L I S Y S
490 490
491 iWhat = SyntaxTable[iPrev][iCur]; 491 iWhat = SyntaxTable[iPrev][iCur];
492 iPrev = iCur; 492 iPrev = iCur;
493 switch (iWhat) { 493 switch (iWhat) {
494 case 0: // syn 494 case 0: // syntax error
495 EVAL_EXIT( EVAL::ERROR_SYNTAX_ERROR, poi 495 EVAL_EXIT( EVAL::ERROR_SYNTAX_ERROR, pointer );
496 case 1: // ope 496 case 1: // operand: number, variable, function
497 EVAL_STATUS = operand(pointer, end, valu 497 EVAL_STATUS = operand(pointer, end, value, pointer, dictionary);
498 if (EVAL_STATUS != EVAL::OK) { EVAL_EXIT 498 if (EVAL_STATUS != EVAL::OK) { EVAL_EXIT( EVAL_STATUS, pointer ); }
499 val.push(value); 499 val.push(value);
500 continue; 500 continue;
501 case 2: // una 501 case 2: // unary + or unary -
502 val.push(0.0); 502 val.push(0.0);
503 if (iCur == PLUS) iCur = UNARY_PLUS; 503 if (iCur == PLUS) iCur = UNARY_PLUS;
504 if (iCur == MINUS) iCur = UNARY_MINUS; 504 if (iCur == MINUS) iCur = UNARY_MINUS;
505 // Note that for syntax purposes, ordina 505 // Note that for syntax purposes, ordinary + or - are fine.
506 // Thus iPrev need not change when we en 506 // Thus iPrev need not change when we encounter a unary minus or plus.
507 case 3: default: // nex 507 case 3: default: // next operator
508 break; 508 break;
509 } 509 }
510 510
511 // N E X T O P E R A T O R 511 // N E X T O P E R A T O R
512 512
513 for(;;) { 513 for(;;) {
514 if (op.size() == 0) { EVAL_EXIT( EVAL::E 514 if (op.size() == 0) { EVAL_EXIT( EVAL::ERROR_SYNTAX_ERROR, pointer ); }
515 iTop = op.top(); 515 iTop = op.top();
516 switch (ActionTable[iTop][iCur]) { 516 switch (ActionTable[iTop][iCur]) {
517 case -1: // sy 517 case -1: // syntax error
518 if (op.size() > 1) pointer = pos.top(); 518 if (op.size() > 1) pointer = pos.top();
519 EVAL_EXIT( EVAL::ERROR_UNPAIRED_PARENTHESIS, 519 EVAL_EXIT( EVAL::ERROR_UNPAIRED_PARENTHESIS, pointer );
520 case 0: // la 520 case 0: // last operation (assignment)
521 if (val.size() == 1) { 521 if (val.size() == 1) {
522 result = val.top(); 522 result = val.top();
523 EVAL_EXIT( EVAL::OK, pointer ); 523 EVAL_EXIT( EVAL::OK, pointer );
524 }else{ 524 }else{
525 EVAL_EXIT( EVAL::ERROR_SYNTAX_ERROR, point 525 EVAL_EXIT( EVAL::ERROR_SYNTAX_ERROR, pointer );
526 } 526 }
527 case 1: // pus 527 case 1: // push current operator in stack
528 op.push(iCur); pos.push(pointer); 528 op.push(iCur); pos.push(pointer);
529 break; 529 break;
530 case 2: // exe 530 case 2: // execute top operator
531 EVAL_STATUS = maker(iTop, val); // put 531 EVAL_STATUS = maker(iTop, val); // put current operator in stack
532 if (EVAL_STATUS != EVAL::OK) { 532 if (EVAL_STATUS != EVAL::OK) {
533 EVAL_EXIT( EVAL_STATUS, pos.top() ); 533 EVAL_EXIT( EVAL_STATUS, pos.top() );
534 } 534 }
535 op.top() = iCur; pos.top() = pointer; 535 op.top() = iCur; pos.top() = pointer;
536 break; 536 break;
537 case 3: // del 537 case 3: // delete '(' from stack
538 op.pop(); pos.pop(); 538 op.pop(); pos.pop();
539 break; 539 break;
540 case 4: default: // exe 540 case 4: default: // execute top operator and
541 EVAL_STATUS = maker(iTop, val); // del 541 EVAL_STATUS = maker(iTop, val); // delete it from stack
542 if (EVAL_STATUS != EVAL::OK) { // rep 542 if (EVAL_STATUS != EVAL::OK) { // repete with the same iCur
543 EVAL_EXIT( EVAL_STATUS, pos.top() ); 543 EVAL_EXIT( EVAL_STATUS, pos.top() );
544 } 544 }
545 op.pop(); pos.pop(); 545 op.pop(); pos.pop();
546 continue; 546 continue;
547 } 547 }
548 break; 548 break;
549 } 549 }
550 } 550 }
551 } 551 }
552 552
553 //-------------------------------------------- 553 //---------------------------------------------------------------------------
554 static void setItem(const char * prefix, const 554 static void setItem(const char * prefix, const char * name,
555 const Item & item, Struct * s) { 555 const Item & item, Struct * s) {
556 556
557 if (name == 0 || *name == '\0') { 557 if (name == 0 || *name == '\0') {
558 s->theStatus = EVAL::ERROR_NOT_A_NAME; 558 s->theStatus = EVAL::ERROR_NOT_A_NAME;
559 return; 559 return;
560 } 560 }
561 561
562 // R E M O V E L E A D I N G A N D T 562 // R E M O V E L E A D I N G A N D T R A I L I N G S P A C E S
563 563
564 const char * pointer; int n; REMOVE_BLANKS; 564 const char * pointer; int n; REMOVE_BLANKS;
565 565
566 // C H E C K N A M E 566 // C H E C K N A M E
567 567
568 if (n == 0) { 568 if (n == 0) {
569 s->theStatus = EVAL::ERROR_NOT_A_NAME; 569 s->theStatus = EVAL::ERROR_NOT_A_NAME;
570 return; 570 return;
571 } 571 }
572 for(int i=0; i<n; i++) { 572 for(int i=0; i<n; i++) {
573 char c = *(pointer+i); 573 char c = *(pointer+i);
574 if (c != '_' && !isalnum(c)) { 574 if (c != '_' && !isalnum(c)) {
575 s->theStatus = EVAL::ERROR_NOT_A_NAME; 575 s->theStatus = EVAL::ERROR_NOT_A_NAME;
576 return; 576 return;
577 } 577 }
578 } 578 }
579 579
580 // A D D I T E M T O T H E D I C T 580 // A D D I T E M T O T H E D I C T I O N A R Y
581 581
582 string item_name = prefix + string(pointer,n 582 string item_name = prefix + string(pointer,n);
583 dic_type::iterator iter = (s->theDictionary) 583 dic_type::iterator iter = (s->theDictionary).find(item_name);
584 if (iter != (s->theDictionary).end()) { 584 if (iter != (s->theDictionary).end()) {
585 iter->second = item; 585 iter->second = item;
586 if (item_name == name) { 586 if (item_name == name) {
587 s->theStatus = EVAL::WARNING_EXISTING_VA 587 s->theStatus = EVAL::WARNING_EXISTING_VARIABLE;
588 }else{ 588 }else{
589 s->theStatus = EVAL::WARNING_EXISTING_FU 589 s->theStatus = EVAL::WARNING_EXISTING_FUNCTION;
590 } 590 }
591 }else{ 591 }else{
592 (s->theDictionary)[item_name] = item; 592 (s->theDictionary)[item_name] = item;
593 s->theStatus = EVAL::OK; 593 s->theStatus = EVAL::OK;
594 } 594 }
595 } 595 }
596 596
597 //-------------------------------------------- 597 //---------------------------------------------------------------------------
598 namespace HepTool { 598 namespace HepTool {
599 599
600 //-------------------------------------------- 600 //---------------------------------------------------------------------------
601 Evaluator::Evaluator() { 601 Evaluator::Evaluator() {
602 Struct * s = new Struct(); 602 Struct * s = new Struct();
603 p = (void *) s; 603 p = (void *) s;
604 s->theExpression = 0; 604 s->theExpression = 0;
605 s->thePosition = 0; 605 s->thePosition = 0;
606 s->theStatus = OK; 606 s->theStatus = OK;
607 s->theResult = 0.0; 607 s->theResult = 0.0;
608 } 608 }
609 609
610 //-------------------------------------------- 610 //---------------------------------------------------------------------------
611 Evaluator::~Evaluator() { 611 Evaluator::~Evaluator() {
612 delete (Struct *)(p); 612 delete (Struct *)(p);
613 } 613 }
614 614
615 //-------------------------------------------- 615 //---------------------------------------------------------------------------
616 double Evaluator::evaluate(const char * expres 616 double Evaluator::evaluate(const char * expression) {
617 Struct * s = (Struct *)(p); 617 Struct * s = (Struct *)(p);
618 if (s->theExpression != 0) { delete[] s->the 618 if (s->theExpression != 0) { delete[] s->theExpression; }
619 s->theExpression = 0; 619 s->theExpression = 0;
620 s->thePosition = 0; 620 s->thePosition = 0;
621 s->theStatus = WARNING_BLANK_STRING; 621 s->theStatus = WARNING_BLANK_STRING;
622 s->theResult = 0.0; 622 s->theResult = 0.0;
623 if (expression != 0) { 623 if (expression != 0) {
624 s->theExpression = new char[strlen(express 624 s->theExpression = new char[strlen(expression)+1];
625 strcpy(s->theExpression, expression); 625 strcpy(s->theExpression, expression);
626 s->theStatus = engine(s->theExpression, 626 s->theStatus = engine(s->theExpression,
627 s->theExpression+strlen(expression)-1, 627 s->theExpression+strlen(expression)-1,
628 s->theResult, 628 s->theResult,
629 s->thePosition, 629 s->thePosition,
630 s->theDictionary); 630 s->theDictionary);
631 } 631 }
632 return s->theResult; 632 return s->theResult;
633 } 633 }
634 634
635 //-------------------------------------------- 635 //---------------------------------------------------------------------------
636 int Evaluator::status() const { 636 int Evaluator::status() const {
637 return ((Struct *)(p))->theStatus; 637 return ((Struct *)(p))->theStatus;
638 } 638 }
639 639
640 //-------------------------------------------- 640 //---------------------------------------------------------------------------
641 int Evaluator::error_position() const { 641 int Evaluator::error_position() const {
642 return int(((Struct *)(p))->thePosition - (( 642 return int(((Struct *)(p))->thePosition - ((Struct *)(p))->theExpression);
643 } 643 }
644 644
645 //-------------------------------------------- 645 //---------------------------------------------------------------------------
646 void Evaluator::print_error() const { 646 void Evaluator::print_error() const {
647 Struct * s = (Struct *) p; 647 Struct * s = (Struct *) p;
648 if(s->theStatus != OK) { 648 if(s->theStatus != OK) {
649 std::cerr << error_name() << std::endl; 649 std::cerr << error_name() << std::endl;
650 } 650 }
651 return; 651 return;
652 } 652 }
653 653
654 //-------------------------------------------- 654 //---------------------------------------------------------------------------
655 std::string Evaluator::error_name() const 655 std::string Evaluator::error_name() const
656 { 656 {
657 char prefix[] = "Evaluator : "; 657 char prefix[] = "Evaluator : ";
658 std::ostringstream errn; 658 std::ostringstream errn;
659 Struct * s = (Struct *) p; 659 Struct * s = (Struct *) p;
660 switch (s->theStatus) { 660 switch (s->theStatus) {
661 case ERROR_NOT_A_NAME: 661 case ERROR_NOT_A_NAME:
662 errn << prefix << "invalid name"; 662 errn << prefix << "invalid name";
663 break; 663 break;
664 case ERROR_SYNTAX_ERROR: 664 case ERROR_SYNTAX_ERROR:
665 errn << prefix << "syntax error"; 665 errn << prefix << "syntax error";
666 break; 666 break;
667 case ERROR_UNPAIRED_PARENTHESIS: 667 case ERROR_UNPAIRED_PARENTHESIS:
668 errn << prefix << "unpaired parenthesis"; 668 errn << prefix << "unpaired parenthesis";
669 break; 669 break;
670 case ERROR_UNEXPECTED_SYMBOL: 670 case ERROR_UNEXPECTED_SYMBOL:
671 errn << prefix << "unexpected symbol"; 671 errn << prefix << "unexpected symbol";
672 break; 672 break;
673 case ERROR_UNKNOWN_VARIABLE: 673 case ERROR_UNKNOWN_VARIABLE:
674 errn << prefix << "unknown variable"; 674 errn << prefix << "unknown variable";
675 break; 675 break;
676 case ERROR_UNKNOWN_FUNCTION: 676 case ERROR_UNKNOWN_FUNCTION:
677 errn << prefix << "unknown function"; 677 errn << prefix << "unknown function";
678 break; 678 break;
679 case ERROR_EMPTY_PARAMETER: 679 case ERROR_EMPTY_PARAMETER:
680 errn << prefix << "empty parameter in func 680 errn << prefix << "empty parameter in function call";
681 break; 681 break;
682 case ERROR_CALCULATION_ERROR: 682 case ERROR_CALCULATION_ERROR:
683 errn << prefix << "calculation error"; 683 errn << prefix << "calculation error";
684 break; 684 break;
685 default: 685 default:
686 errn << " "; 686 errn << " ";
687 } 687 }
688 return errn.str(); 688 return errn.str();
689 } 689 }
690 690
691 //-------------------------------------------- 691 //---------------------------------------------------------------------------
692 void Evaluator::setVariable(const char * name, 692 void Evaluator::setVariable(const char * name, double value)
693 { setItem("", name, Item(value), (Struct *)p); 693 { setItem("", name, Item(value), (Struct *)p); }
694 694
695 void Evaluator::setVariable(const char * name, 695 void Evaluator::setVariable(const char * name, const char * expression)
696 { setItem("", name, Item(expression), (Struct 696 { setItem("", name, Item(expression), (Struct *)p); }
697 697
698 //-------------------------------------------- 698 //---------------------------------------------------------------------------
699 // Fix non ISO C++ compliant cast from pointer 699 // Fix non ISO C++ compliant cast from pointer to function
700 // to void*, which is a pointer to an object 700 // to void*, which is a pointer to an object
701 void Evaluator::setFunction(const char * name, 701 void Evaluator::setFunction(const char * name,
702 double (*fun)()) 702 double (*fun)())
703 { setItem("0", name, Item(reinterpret_cast<voi 703 { setItem("0", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
704 704
705 void Evaluator::setFunction(const char * name, 705 void Evaluator::setFunction(const char * name,
706 double (*fun)(double)) 706 double (*fun)(double))
707 { setItem("1", name, Item(reinterpret_cast<voi 707 { setItem("1", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
708 708
709 void Evaluator::setFunction(const char * name, 709 void Evaluator::setFunction(const char * name,
710 double (*fun)(double,double)) 710 double (*fun)(double,double))
711 { setItem("2", name, Item(reinterpret_cast<voi 711 { setItem("2", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
712 712
713 void Evaluator::setFunction(const char * name, 713 void Evaluator::setFunction(const char * name,
714 double (*fun)(double,double,double)) 714 double (*fun)(double,double,double))
715 { setItem("3", name, Item(reinterpret_cast<voi 715 { setItem("3", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
716 716
717 void Evaluator::setFunction(const char * name, 717 void Evaluator::setFunction(const char * name,
718 double (*fun)(double,double,double,d 718 double (*fun)(double,double,double,double))
719 { setItem("4", name, Item(reinterpret_cast<voi 719 { setItem("4", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
720 720
721 void Evaluator::setFunction(const char * name, 721 void Evaluator::setFunction(const char * name,
722 double (*fun)(double,double,double,d 722 double (*fun)(double,double,double,double,double))
723 { setItem("5", name, Item(reinterpret_cast<voi 723 { setItem("5", name, Item(reinterpret_cast<voidfuncptr>(fun)), (Struct *)p); }
724 724
725 //-------------------------------------------- 725 //---------------------------------------------------------------------------
726 bool Evaluator::findVariable(const char * name 726 bool Evaluator::findVariable(const char * name) const {
727 if (name == 0 || *name == '\0') return false 727 if (name == 0 || *name == '\0') return false;
728 const char * pointer; int n; REMOVE_BLANKS; 728 const char * pointer; int n; REMOVE_BLANKS;
729 if (n == 0) return false; 729 if (n == 0) return false;
730 Struct * s = (Struct *)(p); 730 Struct * s = (Struct *)(p);
731 return 731 return
732 ((s->theDictionary).find(string(pointer,n) 732 ((s->theDictionary).find(string(pointer,n)) == (s->theDictionary).end()) ?
733 false : true; 733 false : true;
734 } 734 }
735 735
736 //-------------------------------------------- 736 //---------------------------------------------------------------------------
737 bool Evaluator::findFunction(const char * name 737 bool Evaluator::findFunction(const char * name, int npar) const {
738 if (name == 0 || *name == '\0') return fa 738 if (name == 0 || *name == '\0') return false;
739 if (npar < 0 || npar > MAX_N_PAR) return fa 739 if (npar < 0 || npar > MAX_N_PAR) return false;
740 const char * pointer; int n; REMOVE_BLANKS; 740 const char * pointer; int n; REMOVE_BLANKS;
741 if (n == 0) return false; 741 if (n == 0) return false;
742 Struct * s = (Struct *)(p); 742 Struct * s = (Struct *)(p);
743 return ((s->theDictionary).find(sss[npar]+st 743 return ((s->theDictionary).find(sss[npar]+string(pointer,n)) ==
744 (s->theDictionary).end()) ? false : true; 744 (s->theDictionary).end()) ? false : true;
745 } 745 }
746 746
747 //-------------------------------------------- 747 //---------------------------------------------------------------------------
748 void Evaluator::removeVariable(const char * na 748 void Evaluator::removeVariable(const char * name) {
749 if (name == 0 || *name == '\0') return; 749 if (name == 0 || *name == '\0') return;
750 const char * pointer; int n; REMOVE_BLANKS; 750 const char * pointer; int n; REMOVE_BLANKS;
751 if (n == 0) return; 751 if (n == 0) return;
752 Struct * s = (Struct *)(p); 752 Struct * s = (Struct *)(p);
753 (s->theDictionary).erase(string(pointer,n)); 753 (s->theDictionary).erase(string(pointer,n));
754 } 754 }
755 755
756 //-------------------------------------------- 756 //---------------------------------------------------------------------------
757 void Evaluator::removeFunction(const char * na 757 void Evaluator::removeFunction(const char * name, int npar) {
758 if (name == 0 || *name == '\0') return; 758 if (name == 0 || *name == '\0') return;
759 if (npar < 0 || npar > MAX_N_PAR) return; 759 if (npar < 0 || npar > MAX_N_PAR) return;
760 const char * pointer; int n; REMOVE_BLANKS; 760 const char * pointer; int n; REMOVE_BLANKS;
761 if (n == 0) return; 761 if (n == 0) return;
762 Struct * s = (Struct *)(p); 762 Struct * s = (Struct *)(p);
763 (s->theDictionary).erase(sss[npar]+string(po 763 (s->theDictionary).erase(sss[npar]+string(pointer,n));
764 } 764 }
765 765
766 //-------------------------------------------- 766 //---------------------------------------------------------------------------
767 void Evaluator::clear() { 767 void Evaluator::clear() {
768 Struct * s = (Struct *) p; 768 Struct * s = (Struct *) p;
769 s->theDictionary.clear(); 769 s->theDictionary.clear();
770 s->theExpression = 0; 770 s->theExpression = 0;
771 s->thePosition = 0; 771 s->thePosition = 0;
772 s->theStatus = OK; 772 s->theStatus = OK;
773 s->theResult = 0.0; 773 s->theResult = 0.0;
774 } 774 }
775 775
776 //-------------------------------------------- 776 //---------------------------------------------------------------------------
777 } // namespace HepTool 777 } // namespace HepTool
778 778