Commit | Line | Data |
---|---|---|
bc97a989 | 1 | #include <malloc.h> |
f2927108 | 2 | #include <math.h> |
87621fe1 | 3 | #include <stdio.h> |
bc97a989 LM |
4 | #include <stdlib.h> |
5 | ||
6 | #include "debug.h" | |
bc97a989 LM |
7 | |
8 | #include "parser.h" | |
9 | ||
5075f6ea LM |
10 | /* global variables */ |
11 | ||
12 | double answer = 0; | |
13 | ||
6ba1dd0f LM |
14 | #define STORAGE_SIZE 10 |
15 | double storage[STORAGE_SIZE] = {0}; | |
16 | ||
bc97a989 LM |
17 | /* compare codes */ |
18 | ||
19 | int codecmp (char *ref, char *str) | |
20 | { | |
21 | int sig; | |
22 | ||
23 | while (*ref != '\0') { | |
0b9cc9b0 LM |
24 | if (*ref == '\t') { |
25 | sig = (*str == '.') ? -1 : ((*str >= '0') && (*str <= '9')); | |
26 | } else { | |
27 | sig = *str - *ref; | |
28 | } | |
bc97a989 LM |
29 | if (sig != 0) { |
30 | return (sig > 0) ? 1 : -1; | |
31 | } | |
0b9cc9b0 LM |
32 | str++; |
33 | ref++; | |
bc97a989 LM |
34 | } |
35 | ||
36 | return 0; | |
37 | } | |
38 | ||
39 | /* allocate new element */ | |
40 | ||
11cda8d7 | 41 | element_t *newelement (func_t function, int nbops, int prio) |
bc97a989 LM |
42 | { |
43 | element_t *new = (element_t *) calloc (1, sizeof (element_t)); | |
44 | if (new == NULL) { | |
04d68907 | 45 | VERBOSE (ERROR, fprintf (stderr, "can't allocate memory\n")); |
bc97a989 LM |
46 | return NULL; |
47 | } | |
48 | new->func = function; | |
49 | new->nbops = nbops; | |
11cda8d7 | 50 | new->prio = prio; |
bc97a989 LM |
51 | |
52 | return new; | |
53 | } | |
54 | ||
031d7bba LM |
55 | /* desallocate element */ |
56 | ||
57 | void delelement (element_t *root) | |
58 | { | |
59 | int i; | |
60 | if ((root != NULL) && (root != ERROR_OP)) { | |
61 | for (i = 0; i < root->nbops; i++) { | |
62 | if ((root->ops[i] != NULL) && (root->ops[i] != ERROR_OP)) { | |
63 | delelement (root->ops[i]); | |
64 | } | |
65 | } | |
66 | free (root); | |
67 | } | |
68 | } | |
69 | ||
bc97a989 LM |
70 | /* functions */ |
71 | ||
ca3e2a2f | 72 | #define NB_OPERATORS 14 |
bc97a989 LM |
73 | |
74 | keyword_t operators[NB_OPERATORS] = { | |
11cda8d7 LM |
75 | { "+\t", Add, 2, 1, 1}, |
76 | { "-\t", Sub, 2, 1, 1}, | |
77 | { "*", Mul, 2, 1, 2}, | |
78 | { "/", Div, 2, 1, 2}, | |
c47a9298 | 79 | { "%", Mod, 2, 1, 3}, |
7fe742c9 | 80 | { "^", Pow, 2, 1, 4}, |
ca3e2a2f LM |
81 | { "==", Equal, 2, 2, -1}, |
82 | { "!=", Diff, 2, 2, -1}, | |
83 | { ">=", Ge, 2, 2, -1}, | |
84 | { "<=", Le, 2, 2, -1}, | |
85 | { ">", Gt, 2, 1, -1}, | |
86 | { "<", Lt, 2, 1, -1}, | |
87 | { "&", And, 2, 1, -2}, | |
88 | { "|", Or, 2, 1, -2} | |
bc97a989 LM |
89 | }; |
90 | ||
ca3e2a2f | 91 | #define NB_FUNCTIONS 13 |
bc97a989 | 92 | keyword_t functions[NB_FUNCTIONS] = { |
c47a9298 LM |
93 | { "sqrt", Sqr, 1, 4, 5}, |
94 | { "pow", Pow, 2, 3, 5}, | |
95 | { "cos", Cos, 1, 3, 5}, | |
96 | { "sin", Sin, 1, 3, 5}, | |
471da7c9 | 97 | { "atan", Atan, 1, 4, 5}, |
c47a9298 | 98 | { "exp", Exp, 1, 3, 5}, |
89cf0955 | 99 | { "log", Log, 1, 3, 5}, |
ca3e2a2f | 100 | { "sto", Store, 2, 3, 9}, |
6ba1dd0f | 101 | { "rcl", Recall, 1, 3, 5}, |
ca3e2a2f LM |
102 | { "disp", Disp, 0, 4, 9}, |
103 | { "quit", Quit, 0, 4, 9}, | |
104 | { "help", Help, 0, 4, 9}, | |
105 | { "!", Not, 1, 1, 5} | |
471da7c9 LM |
106 | }; |
107 | ||
5075f6ea | 108 | #define NB_CONSTANTS 3 |
471da7c9 | 109 | keyword_t constants[NB_CONSTANTS] = { |
5075f6ea LM |
110 | { "ans", Ans, 0, 3, 5}, |
111 | { "e", E, 0, 1, 5}, | |
112 | { "pi", Pi, 0, 2, 5} | |
bc97a989 LM |
113 | }; |
114 | ||
d2ff8478 LM |
115 | /* subparser function */ |
116 | ||
117 | element_t *subparser (element_t **proot, char **pstr, func_t func, int nbops, int prio) | |
118 | { | |
119 | element_t *new = newelement (func, nbops, prio); | |
120 | if (new == NULL) { | |
121 | return ERROR_OP; | |
122 | } | |
123 | new->ops[0] = *proot; | |
124 | new->ops[1] = parser (*pstr, pstr, new->prio); | |
125 | if (new->ops[1] == ERROR_OP) { | |
031d7bba LM |
126 | delelement (new); |
127 | *proot = NULL; | |
d2ff8478 LM |
128 | return ERROR_OP; |
129 | } | |
3b4b0bbe | 130 | *proot = newelement (Val, 1, 5); |
031d7bba LM |
131 | if (*proot == NULL) { |
132 | delelement (new); | |
d2ff8478 LM |
133 | return ERROR_OP; |
134 | } | |
135 | (*proot)->ops[0] = new; | |
136 | ||
137 | return *proot; | |
138 | } | |
139 | ||
bc97a989 LM |
140 | /* parser function */ |
141 | ||
ef37d966 | 142 | element_t *parser (char *str, char **next, int prio) |
0b489a77 | 143 | { |
bc97a989 | 144 | element_t *root = NULL; |
85b4a72c | 145 | int i; |
bc97a989 | 146 | |
04d68907 | 147 | VERBOSE (DEBUG, fprintf (stdout, "Starting parsing\n")); |
49223129 | 148 | |
bc97a989 LM |
149 | /* main loop */ |
150 | while (*str != '\0') { | |
151 | int found = 0; | |
152 | element_t *new = NULL; | |
04d68907 | 153 | VERBOSE (INFO, fprintf (stdout, "Processing: %s\n", str)); |
bc97a989 LM |
154 | |
155 | /* skip spaces and tabs */ | |
156 | ||
157 | if ((*str == ' ') || (*str == '\t')) { | |
158 | str++; | |
159 | continue; | |
160 | } | |
161 | ||
85b4a72c | 162 | /* check for open bracket */ |
0b489a77 | 163 | |
0b489a77 | 164 | if (*str == '(') { |
04d68907 | 165 | VERBOSE (DEBUG, fprintf (stdout, "start processing bracket\n")); |
0b489a77 | 166 | if (root) { |
85b4a72c LM |
167 | do { |
168 | found = 0; | |
ef37d966 | 169 | new = parser (str + 1, &str, 0); |
85b4a72c | 170 | if (new == ERROR_OP) { |
031d7bba | 171 | delelement (root); |
85b4a72c LM |
172 | return ERROR_OP; |
173 | } | |
174 | for (i = 0; i < root->nbops; i++) { | |
175 | if (root->ops[i] == NULL) { | |
0b489a77 LM |
176 | root->ops[i] = new; |
177 | found = 1; | |
178 | break; | |
179 | } | |
180 | } | |
85b4a72c | 181 | if (!found) { |
031d7bba LM |
182 | delelement (new); |
183 | delelement (root); | |
85b4a72c LM |
184 | return ERROR_OP; |
185 | } | |
186 | } while (*str == ','); | |
187 | } else { | |
3b4b0bbe | 188 | root = newelement (Val, 1, 5); |
85b4a72c | 189 | if (root == NULL) { |
0b489a77 LM |
190 | return ERROR_OP; |
191 | } | |
ef37d966 | 192 | new = parser (str + 1, &str, 0); |
85b4a72c | 193 | if ((new == ERROR_OP) || (*str == ',')) { |
031d7bba LM |
194 | delelement (new); |
195 | delelement (root); | |
efdfb543 LM |
196 | return ERROR_OP; |
197 | } | |
85b4a72c | 198 | root->ops[0] = new; |
0b489a77 | 199 | } |
85b4a72c | 200 | str++; |
04d68907 | 201 | VERBOSE (DEBUG, fprintf (stdout, "stop processing bracket\n")); |
efdfb543 | 202 | continue; |
49223129 | 203 | } |
85b4a72c LM |
204 | |
205 | /* check for closing bracket or koma */ | |
206 | ||
207 | if ((*str == ')') || (*str == ',')) { | |
49223129 | 208 | if (next != NULL) { |
85b4a72c | 209 | *next = str; |
49223129 LM |
210 | } |
211 | return root; | |
0b489a77 LM |
212 | } |
213 | ||
bc97a989 LM |
214 | /* look for operators */ |
215 | ||
216 | for (i = 0; i < NB_OPERATORS; i++) { | |
217 | keyword_t *operator = operators + i; | |
218 | if (codecmp (operator->keyword, str) == 0) { | |
04d68907 | 219 | VERBOSE (DEBUG, fprintf (stdout, "start processing operator\n")); |
11cda8d7 | 220 | if (root) { |
ef37d966 | 221 | if ((prio) && (prio > operator->prio)) { |
04d68907 | 222 | VERBOSE (DEBUG, fprintf (stdout, "stop because operator priority\n")); |
ef37d966 LM |
223 | *next = str; |
224 | return root; | |
225 | } | |
226 | str += operator->offset; | |
04d68907 | 227 | VERBOSE (INFO, fprintf (stdout, "Oper: %d\n", operator->func)); |
d2ff8478 | 228 | if (subparser (&root, &str, operator->func, operator->nbops, operator->prio) == ERROR_OP) { |
031d7bba | 229 | delelement (root); |
ef37d966 | 230 | return ERROR_OP; |
11cda8d7 | 231 | } |
3b4b0bbe LM |
232 | } else if (*str == '-') { |
233 | new = newelement (Sig, 1, 9); | |
234 | if (new == NULL) { | |
235 | return ERROR_OP; | |
236 | } | |
237 | root = new; | |
49223129 | 238 | } else { |
0b489a77 | 239 | return ERROR_OP; |
bc97a989 | 240 | } |
bc97a989 | 241 | found = 1; |
04d68907 | 242 | VERBOSE (DEBUG, fprintf (stdout, "stop processing operator\n")); |
bc97a989 LM |
243 | break; |
244 | } | |
245 | } | |
246 | if (found) { | |
bc97a989 LM |
247 | continue; |
248 | } | |
49223129 | 249 | |
bc97a989 LM |
250 | /* look for functions */ |
251 | ||
252 | for (i = 0; i < NB_FUNCTIONS; i++) { | |
253 | keyword_t *function = functions + i; | |
254 | if (codecmp (function->keyword, str) == 0) { | |
04d68907 | 255 | VERBOSE (DEBUG, fprintf (stdout, "start processing function\n")); |
bc97a989 | 256 | if (root == NULL) { |
04d68907 | 257 | VERBOSE (INFO, fprintf (stdout, "Func: %d\n", function->func)); |
11cda8d7 | 258 | new = newelement (function->func, function->nbops, function->prio); |
bc97a989 | 259 | if (new == NULL) { |
0b489a77 | 260 | return ERROR_OP; |
bc97a989 LM |
261 | } |
262 | root = new; | |
031d7bba LM |
263 | } else { |
264 | delelement (root); | |
0b489a77 | 265 | return ERROR_OP; |
bc97a989 LM |
266 | } |
267 | str += function->offset; | |
268 | found = 1; | |
04d68907 | 269 | VERBOSE (DEBUG, fprintf (stdout, "stop processing function\n")); |
bc97a989 LM |
270 | break; |
271 | } | |
272 | } | |
273 | if (found) { | |
bc97a989 LM |
274 | continue; |
275 | } | |
276 | ||
471da7c9 LM |
277 | /* look for constant */ |
278 | ||
279 | for (i = 0; i < NB_CONSTANTS; i++) { | |
280 | keyword_t *constant = constants + i; | |
281 | if (codecmp (constant->keyword, str) == 0) { | |
282 | VERBOSE (DEBUG, fprintf (stdout, "start processing constant\n")); | |
283 | if (root == NULL) { | |
5075f6ea | 284 | VERBOSE (INFO, fprintf (stdout, "Const: %d\n", constant->func)); |
471da7c9 LM |
285 | new = newelement (constant->func, constant->nbops, constant->prio); |
286 | if (new == NULL) { | |
287 | return ERROR_OP; | |
288 | } | |
289 | root = new; | |
290 | } else { | |
291 | delelement (root); | |
292 | return ERROR_OP; | |
293 | } | |
294 | str += constant->offset; | |
295 | found = 1; | |
296 | VERBOSE (DEBUG, fprintf (stdout, "stop processing constant\n")); | |
297 | break; | |
298 | } | |
299 | } | |
300 | if (found) { | |
301 | continue; | |
302 | } | |
303 | ||
bc97a989 LM |
304 | /* look for number */ |
305 | ||
0b9cc9b0 LM |
306 | if (((*str >= '0') && (*str <= '9')) || |
307 | (*str == '.') || (*str == '+') || (*str == '-')) { | |
04d68907 | 308 | VERBOSE (DEBUG, fprintf (stdout, "start processing value\n")); |
bc97a989 | 309 | char *pt; |
fd88e359 | 310 | double value = strtod (str, &pt); |
04d68907 | 311 | VERBOSE (INFO, fprintf (stdout, "Value: %f\n", value)); |
bc97a989 | 312 | if (str != pt) { |
bc97a989 | 313 | if (root == NULL) { |
3b4b0bbe | 314 | new = newelement (Val, 1, 5); |
c47a9298 LM |
315 | if (new == NULL) { |
316 | return ERROR_OP; | |
317 | } | |
318 | new->value = value; | |
bc97a989 | 319 | root = new; |
c47a9298 | 320 | str = pt; |
32741902 LM |
321 | } else if ((*str == '+') || (*str == '-')) { |
322 | if ((prio) && (prio > 1)) { | |
323 | VERBOSE (DEBUG, fprintf (stdout, "stop because operator priority\n")); | |
324 | *next = str; | |
325 | return root; | |
326 | } | |
327 | if (subparser (&root, &str, Add, 2, 1) == ERROR_OP) { | |
031d7bba | 328 | delelement (root); |
0b489a77 | 329 | return ERROR_OP; |
bc97a989 | 330 | } |
0b9cc9b0 | 331 | } else { |
031d7bba | 332 | delelement (root); |
0b9cc9b0 | 333 | return ERROR_OP; |
bc97a989 | 334 | } |
bc97a989 LM |
335 | found = 1; |
336 | } | |
04d68907 | 337 | VERBOSE (DEBUG, fprintf (stdout, "stop processing value\n")); |
bc97a989 LM |
338 | } |
339 | ||
340 | /* error */ | |
341 | ||
342 | if (!found) { | |
031d7bba | 343 | delelement (root); |
0b489a77 | 344 | return ERROR_OP; |
bc97a989 LM |
345 | } |
346 | ||
347 | } | |
348 | ||
49223129 LM |
349 | if (next != NULL) { |
350 | *next = str; | |
351 | } | |
031d7bba | 352 | |
bc97a989 LM |
353 | return root; |
354 | } | |
355 | ||
356 | /* print element tree */ | |
357 | ||
358 | void print_element (element_t *root, int level) | |
359 | { | |
360 | char *func = NULL; | |
361 | int i; | |
362 | ||
49223129 | 363 | if ((root == NULL) || (root == ERROR_OP)) { |
bc97a989 | 364 | return; |
49223129 LM |
365 | } |
366 | ||
bc97a989 | 367 | for (i = 0; i < level; i++) { |
04d68907 | 368 | fprintf (stdout, " "); |
bc97a989 LM |
369 | } |
370 | ||
371 | switch (root->func) { | |
372 | case Val: func = "Value"; break; | |
89cf0955 | 373 | case Sig: func = "Sign"; break; |
bc97a989 LM |
374 | case Add: func = "Addition"; break; |
375 | case Sub: func = "Subtraction"; break; | |
376 | case Mul: func = "Multiplication"; break; | |
377 | case Div: func = "Division"; break; | |
c47a9298 | 378 | case Mod: func = "Modulo"; break; |
bc97a989 LM |
379 | case Pow: func = "Power"; break; |
380 | case Sqr: func = "Square Root"; break; | |
381 | case Cos: func = "Cosine"; break; | |
382 | case Sin: func = "Sine"; break; | |
471da7c9 | 383 | case Atan: func = "Arc Tangent"; break; |
bc97a989 LM |
384 | case Log: func = "Logarithm"; break; |
385 | case Exp: func = "Exponantial"; break; | |
6ba1dd0f LM |
386 | case Store: func = "Store"; break; |
387 | case Recall: func = "Recall"; break; | |
388 | case Disp: func = "Display"; break; | |
471da7c9 LM |
389 | case Quit: func = "Quit"; break; |
390 | case Help: func = "Help"; break; | |
5075f6ea | 391 | case Ans: func = "Ans"; break; |
471da7c9 LM |
392 | case Pi: func = "Pi"; break; |
393 | case E: func = "E"; break; | |
7fe742c9 LM |
394 | case Equal: func = "Equal"; break; |
395 | case Diff: func = "Different"; break; | |
396 | case Ge: func = "Greater or equal"; break; | |
397 | case Le: func = "Lesser or equal"; break; | |
398 | case Gt: func = "Greater"; break; | |
399 | case Lt: func = "Lesser"; break; | |
ca3e2a2f LM |
400 | case And: func = "And"; break; |
401 | case Or: func = "Or"; break; | |
402 | case Not: func = "Not"; break; | |
bc97a989 LM |
403 | } |
404 | ||
04d68907 | 405 | fprintf (stdout, "Function: %s\n", func); |
bc97a989 | 406 | |
85b4a72c | 407 | if ((root->func == Val) && (root->ops[0] == NULL)) { |
bc97a989 | 408 | for (i = 0; i < level; i++) { |
04d68907 | 409 | fprintf (stdout, " "); |
bc97a989 | 410 | } |
04d68907 | 411 | fprintf (stdout, "value: %f\n", root->value); |
bc97a989 LM |
412 | } else { |
413 | for (i = 0; i < root->nbops; i++) { | |
414 | print_element (root->ops[i], level + 1); | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
6ba1dd0f LM |
419 | /* storage functions */ |
420 | ||
3639df66 | 421 | double store (int index, double value) |
6ba1dd0f LM |
422 | { |
423 | if ((index > 0) && (index <= STORAGE_SIZE)) { | |
3639df66 | 424 | storage[index - 1] = value; |
6ba1dd0f LM |
425 | } else { |
426 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [1, %d]\n", index, STORAGE_SIZE)); | |
427 | } | |
3639df66 | 428 | return value; |
6ba1dd0f LM |
429 | } |
430 | ||
431 | double recall (int index) | |
432 | { | |
433 | if ((index > 0) && (index <= STORAGE_SIZE)) { | |
434 | return storage[index - 1]; | |
435 | } else { | |
436 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [1, %d]\n", index, STORAGE_SIZE)); | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | ||
441 | void display (void) | |
442 | { | |
443 | int i; | |
444 | fprintf (stdout, "storage:"); | |
445 | for (i = 0; i < STORAGE_SIZE; i++) { | |
446 | fprintf (stdout, " %g", storage[i]); | |
447 | } | |
448 | fprintf (stdout, "\n"); | |
449 | } | |
450 | ||
89cf0955 LM |
451 | /* quit function */ |
452 | ||
453 | void quit (void) | |
454 | { | |
04d68907 | 455 | fprintf (stdout, "bye\n"); |
89cf0955 LM |
456 | exit (0); |
457 | } | |
458 | ||
459 | /* help message */ | |
460 | ||
461 | void help (void) | |
462 | { | |
04d68907 LM |
463 | fprintf (stdout, "calc is a simple calculator\n\n"); |
464 | fprintf (stdout, "supported operators:\n"); | |
465 | fprintf (stdout, " + - * / %% ^\n\n"); | |
7fe742c9 LM |
466 | fprintf (stdout, "camparison operators:\n"); |
467 | fprintf (stdout, " == != >= <= > <\n\n"); | |
04d68907 LM |
468 | fprintf (stdout, "supported functions:\n"); |
469 | fprintf (stdout, " pow sqrt cos sin atan log exp\n\n"); | |
6ba1dd0f LM |
470 | fprintf (stdout, "storage functions:\n"); |
471 | fprintf (stdout, " sto rcl\n\n"); | |
04d68907 | 472 | fprintf (stdout, "miscellaneous functions:\n"); |
471da7c9 LM |
473 | fprintf (stdout, " quit help\n\n"); |
474 | fprintf (stdout, "supported constants:\n"); | |
475 | fprintf (stdout, " e pi\n"); | |
89cf0955 | 476 | } |
3b4b0bbe | 477 | |
f2927108 LM |
478 | /* evaluate element tree */ |
479 | ||
89cf0955 LM |
480 | #define MASK_SUB 0x1 |
481 | #define MASK_DIV 0x2 | |
482 | ||
3b4b0bbe | 483 | double evaluate_element (element_t *root, char mask) |
f2927108 LM |
484 | { |
485 | double op0 = 0, op1 = 0; | |
3b4b0bbe | 486 | char nextmask = mask; |
f2927108 LM |
487 | |
488 | if ((root == NULL) || (root == ERROR_OP)) { | |
04d68907 | 489 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating\n")); |
f2927108 LM |
490 | return 0; |
491 | } | |
492 | ||
3b4b0bbe LM |
493 | /* mask to manage sub operator sub and div */ |
494 | switch (root->func) { | |
495 | case Add: | |
496 | nextmask &= ~MASK_SUB; | |
497 | nextmask &= ~MASK_DIV; | |
498 | break; | |
499 | case Sub: | |
500 | nextmask |= MASK_SUB; | |
501 | nextmask &= ~MASK_DIV; | |
502 | break; | |
503 | case Mul: | |
504 | nextmask &= ~MASK_DIV; | |
505 | break; | |
506 | case Div: | |
507 | nextmask |= MASK_DIV; | |
508 | break; | |
509 | default: | |
510 | nextmask = mask; | |
511 | } | |
512 | ||
f2927108 LM |
513 | switch (root->func) { |
514 | case Val: | |
3b4b0bbe LM |
515 | case Sig: |
516 | op0 = (root->ops[0]) ? evaluate_element (root->ops[0], nextmask) : root->value; | |
f2927108 LM |
517 | break; |
518 | case Add: | |
519 | case Sub: | |
520 | case Mul: | |
521 | case Div: | |
c47a9298 | 522 | case Mod: |
f2927108 | 523 | case Pow: |
3639df66 | 524 | case Store: |
7fe742c9 LM |
525 | case Equal: |
526 | case Diff: | |
527 | case Ge: | |
528 | case Le: | |
529 | case Gt: | |
530 | case Lt: | |
ca3e2a2f LM |
531 | case And: |
532 | case Or: | |
f2927108 | 533 | if (root->ops[1]) { |
3b4b0bbe | 534 | op1 = evaluate_element (root->ops[1], nextmask); |
3639df66 | 535 | } else if (root->func != Store) { |
04d68907 | 536 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating (op[1])\n")); |
f2927108 LM |
537 | return 0; |
538 | } | |
539 | /* fallthrough */ | |
540 | case Sqr: | |
541 | case Cos: | |
542 | case Sin: | |
471da7c9 | 543 | case Atan: |
f2927108 LM |
544 | case Log: |
545 | case Exp: | |
6ba1dd0f | 546 | case Recall: |
ca3e2a2f | 547 | case Not: |
f2927108 | 548 | if (root->ops[0]) { |
3b4b0bbe | 549 | op0 = evaluate_element (root->ops[0], 0); |
f2927108 | 550 | } else { |
04d68907 | 551 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating (op[0])\n")); |
f2927108 LM |
552 | return 0; |
553 | } | |
89cf0955 | 554 | break; |
6ba1dd0f | 555 | case Disp: |
471da7c9 LM |
556 | case Quit: |
557 | case Help: | |
5075f6ea | 558 | case Ans: |
471da7c9 LM |
559 | case Pi: |
560 | case E: | |
89cf0955 | 561 | break; |
f2927108 LM |
562 | } |
563 | ||
564 | switch (root->func) { | |
3b4b0bbe LM |
565 | case Val: return op0; |
566 | case Sig: return -op0; | |
567 | case Add: return ((mask & MASK_SUB) == 0) ? op0 + op1 : op0 - op1; | |
568 | case Sub: return ((mask & MASK_SUB) == 0) ? op0 - op1 : op0 + op1; | |
569 | case Mul: return ((mask & MASK_DIV) == 0) ? op0 * op1 : op0 / op1; | |
570 | case Div: return ((mask & MASK_DIV) == 0) ? op0 / op1 : op0 * op1; | |
c47a9298 | 571 | case Mod: return fmod (op0, op1); |
f2927108 LM |
572 | case Pow: return pow (op0, op1); |
573 | case Sqr: return sqrt (op0); | |
574 | case Cos: return cos (op0); | |
575 | case Sin: return sin (op0); | |
471da7c9 | 576 | case Atan: return atan (op0); |
f2927108 LM |
577 | case Log: return log (op0); |
578 | case Exp: return exp (op0); | |
3639df66 | 579 | case Store: return store ((int)op0, (op1) ? op1 : answer); |
6ba1dd0f LM |
580 | case Recall: return recall ((int)op0); |
581 | case Disp: display (); break; | |
471da7c9 LM |
582 | case Quit: quit (); break; |
583 | case Help: help (); break; | |
5075f6ea | 584 | case Ans: return answer; |
471da7c9 LM |
585 | case Pi: return M_PI; |
586 | case E: return M_E; | |
7fe742c9 LM |
587 | case Equal: return op0 == op1; |
588 | case Diff: return op0 != op1; | |
589 | case Ge: return op0 >= op1; | |
590 | case Le: return op0 <= op1; | |
591 | case Gt: return op0 > op1; | |
592 | case Lt: return op0 < op1; | |
ca3e2a2f LM |
593 | case And: return (op0 != 0) && (op1 != 0); |
594 | case Or: return (op0 != 0) || (op1 != 0); | |
595 | case Not: return (op0 == 0); | |
f2927108 LM |
596 | } |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
bc97a989 | 601 | /* vim: set ts=4 sw=4 et: */ |