| 1 | #include <malloc.h> |
| 2 | #include <math.h> |
| 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <string.h> |
| 6 | |
| 7 | #include "debug.h" |
| 8 | |
| 9 | #include "parser.h" |
| 10 | |
| 11 | /* global variables */ |
| 12 | |
| 13 | double answer = 0; |
| 14 | |
| 15 | #define DEFAULT_STORAGE_SIZE 10 |
| 16 | int storage_size = -1; |
| 17 | |
| 18 | double *storage = NULL; |
| 19 | |
| 20 | #define DEFAULT_FORMAT "=> %.6g\n" |
| 21 | char *format = NULL; |
| 22 | char *minform = NULL; |
| 23 | |
| 24 | workspace_t *programs = NULL; |
| 25 | int nb_programs = 0; |
| 26 | |
| 27 | /* compare codes */ |
| 28 | |
| 29 | int codecmp (char *ref, char *str) |
| 30 | { |
| 31 | int sig; |
| 32 | |
| 33 | while (*ref != '\0') { |
| 34 | if (*ref == '\t') { |
| 35 | sig = (*str == '.') ? -1 : ((*str >= '0') && (*str <= '9')); |
| 36 | } else { |
| 37 | sig = *str - *ref; |
| 38 | } |
| 39 | if (sig != 0) { |
| 40 | return (sig > 0) ? 1 : -1; |
| 41 | } |
| 42 | str++; |
| 43 | ref++; |
| 44 | } |
| 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | /* calloc or die function */ |
| 50 | |
| 51 | void *callocordie (size_t count, size_t size) |
| 52 | { |
| 53 | if (count * size == 0) { |
| 54 | return NULL; |
| 55 | } |
| 56 | void *new = calloc (count, size); |
| 57 | if (new == NULL) { |
| 58 | VERBOSE (ERROR, fprintf (stderr, "can't allocate memory\n")); |
| 59 | exit (1); |
| 60 | } |
| 61 | return new; |
| 62 | } |
| 63 | |
| 64 | /* allocate new element */ |
| 65 | |
| 66 | element_t *newelement (func_t function, int nbops, int prio) |
| 67 | { |
| 68 | element_t *new = (element_t *) callocordie (1, sizeof (element_t)); |
| 69 | if (nbops) { |
| 70 | new->ops = (element_t **) callocordie (nbops, sizeof (element_t *)); |
| 71 | } |
| 72 | new->func = function; |
| 73 | new->nbops = nbops; |
| 74 | new->prio = prio; |
| 75 | |
| 76 | return new; |
| 77 | } |
| 78 | |
| 79 | /* desallocate element */ |
| 80 | |
| 81 | void delelement (element_t *root) |
| 82 | { |
| 83 | if ((root != NULL) && (root != ERROR_OP)) { |
| 84 | int i; |
| 85 | for (i = 0; i < root->nbops; i++) { |
| 86 | if ((root->ops[i] != NULL) && (root->ops[i] != ERROR_OP)) { |
| 87 | delelement (root->ops[i]); |
| 88 | } |
| 89 | } |
| 90 | if (root->nbops) { |
| 91 | free (root->ops); |
| 92 | } |
| 93 | free (root); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /* duplicate element */ |
| 98 | |
| 99 | element_t *dupelement (element_t *root) |
| 100 | { |
| 101 | element_t *tmp = NULL; |
| 102 | int i; |
| 103 | |
| 104 | if ((root == NULL) || (root == ERROR_OP)) { |
| 105 | return root; |
| 106 | } |
| 107 | tmp = newelement (root->func, root->nbops, root->prio); |
| 108 | tmp->value = root->value; |
| 109 | for (i = 0; i < root->nbops; i++) { |
| 110 | tmp->ops[i] = dupelement (root->ops[i]); |
| 111 | } |
| 112 | return tmp; |
| 113 | } |
| 114 | |
| 115 | /* functions */ |
| 116 | |
| 117 | #define NB_OPERATORS 14 |
| 118 | keyword_t operators[NB_OPERATORS] = { |
| 119 | { "+\t", Add, 2, 1, 1}, |
| 120 | { "-\t", Sub, 2, 1, 1}, |
| 121 | { "*", Mul, 2, 1, 2}, |
| 122 | { "/", Div, 2, 1, 2}, |
| 123 | { "%", Mod, 2, 1, 3}, |
| 124 | { "^", Pow, 2, 1, 4}, |
| 125 | { "==", Equal, 2, 2, -1}, |
| 126 | { "!=", Diff, 2, 2, -1}, |
| 127 | { ">=", Ge, 2, 2, -1}, |
| 128 | { "<=", Le, 2, 2, -1}, |
| 129 | { ">", Gt, 2, 1, -1}, |
| 130 | { "<", Lt, 2, 1, -1}, |
| 131 | { "&", And, 2, 1, -2}, |
| 132 | { "|", Or, 2, 1, -2} |
| 133 | }; |
| 134 | |
| 135 | #define NB_FUNCTIONS 31 |
| 136 | keyword_t functions[NB_FUNCTIONS] = { |
| 137 | { "sqrt", Sqr, 1, 4, 5}, |
| 138 | { "pow", Pow, 2, 3, 5}, |
| 139 | { "cos", Cos, 1, 3, 5}, |
| 140 | { "sin", Sin, 1, 3, 5}, |
| 141 | { "tan", Tan, 1, 3, 5}, |
| 142 | { "acos", Acos, 1, 4, 5}, |
| 143 | { "asin", Asin, 1, 4, 5}, |
| 144 | { "atan", Atan, 1, 4, 5}, |
| 145 | { "log", Log, 1, 3, 5}, |
| 146 | { "exp", Exp, 1, 3, 5}, |
| 147 | { "abs", Abs, 1, 3, 5}, |
| 148 | { "floor", Floor, 1, 5, 5}, |
| 149 | { "ceil", Ceil, 1, 4, 5}, |
| 150 | { "sto", Store, 2, 3, 5}, |
| 151 | { "rcl", Recall, 1, 3, 5}, |
| 152 | { "inc", Inc, 1, 3, 5}, |
| 153 | { "dec", Dec, 1, 3, 5}, |
| 154 | { "disp", Disp, 0, 4, 9}, |
| 155 | { "mem", Mem, 1, 3, 9}, |
| 156 | { "clr", Clear, 0, 3, 9}, |
| 157 | { "quit", Quit, 0, 4, 9}, |
| 158 | { "help", Help, 0, 4, 9}, |
| 159 | { "!", Not, 1, 1, 6}, |
| 160 | { "cond", Cond, 3, 4, 5}, |
| 161 | { "while", While, 2, 5, 5}, |
| 162 | { "print", Print, 1, 5, 5}, |
| 163 | { "prog", Prog, 3, 4, 9}, |
| 164 | { "call", Call, 10, 4, 5}, |
| 165 | { "ls", List, 0, 2, 9}, |
| 166 | { "edit", Edit, 1, 4, 9}, |
| 167 | { "del", Del, 1, 3, 9} |
| 168 | }; |
| 169 | |
| 170 | #define NB_CONSTANTS 3 |
| 171 | keyword_t constants[NB_CONSTANTS] = { |
| 172 | { "ans", Ans, 0, 3, 5}, |
| 173 | { "e", E, 0, 1, 5}, |
| 174 | { "pi", Pi, 0, 2, 5} |
| 175 | }; |
| 176 | |
| 177 | #define NB_SYMBOLS 4 |
| 178 | char *symbols[NB_SYMBOLS] = { |
| 179 | "(", ")", "{", "}" |
| 180 | }; |
| 181 | |
| 182 | /* subparser function */ |
| 183 | |
| 184 | element_t *subparser (element_t **proot, char **pstr, func_t func, int nbops, int prio) |
| 185 | { |
| 186 | element_t *new = newelement (func, nbops, prio); |
| 187 | new->ops[0] = *proot; |
| 188 | new->ops[1] = parser (*pstr, pstr, new->prio); |
| 189 | if ((new->ops[1] == NULL) || ((new->ops[1] != ERROR_OP) && (new->ops[1]->prio == 9))) { |
| 190 | delelement (new->ops[1]); |
| 191 | new->ops[1] = ERROR_OP; |
| 192 | } |
| 193 | if (new->ops[1] == ERROR_OP) { |
| 194 | delelement (new); |
| 195 | *proot = NULL; |
| 196 | return ERROR_OP; |
| 197 | } |
| 198 | *proot = newelement (Val, 1, 5); |
| 199 | (*proot)->ops[0] = new; |
| 200 | |
| 201 | return *proot; |
| 202 | } |
| 203 | |
| 204 | /* parser function */ |
| 205 | |
| 206 | element_t *parser (char *str, char **next, int prio) |
| 207 | { |
| 208 | element_t *root = NULL; |
| 209 | char *string = str; |
| 210 | int i; |
| 211 | |
| 212 | VERBOSE (DEBUG, fprintf (stdout, "Starting parsing\n")); |
| 213 | |
| 214 | /* main loop */ |
| 215 | while (*str != '\0') { |
| 216 | int found = 0; |
| 217 | element_t *new = NULL; |
| 218 | VERBOSE (INFO, fprintf (stdout, "Processing: %s\n", str)); |
| 219 | |
| 220 | /* end without printing */ |
| 221 | |
| 222 | if (*str == ';') { |
| 223 | if (root) { |
| 224 | root->hidden = 1; |
| 225 | } |
| 226 | break; |
| 227 | } |
| 228 | |
| 229 | /* skip spaces and tabs */ |
| 230 | |
| 231 | if ((*str == ' ') || (*str == '\t')) { |
| 232 | str++; |
| 233 | continue; |
| 234 | } |
| 235 | |
| 236 | /* check for open brace */ |
| 237 | |
| 238 | if (*str == '{') { |
| 239 | VERBOSE (DEBUG, fprintf (stdout, "start processing brace\n")); |
| 240 | if (root != NULL) { |
| 241 | delelement (root); |
| 242 | return ERROR_OP; |
| 243 | } |
| 244 | element_t **prog = NULL; |
| 245 | new = newelement (Code, 0, 5); |
| 246 | root = new; |
| 247 | prog = &root; |
| 248 | |
| 249 | do { |
| 250 | new = parser (str + 1, &str, 0); |
| 251 | if ((new == NULL) || ((new != ERROR_OP) && (new->prio == 9))) { |
| 252 | delelement (new); |
| 253 | new = ERROR_OP; |
| 254 | } |
| 255 | if (new == ERROR_OP) { |
| 256 | delelement (root); |
| 257 | return ERROR_OP; |
| 258 | } |
| 259 | element_t *newprog = newelement (Code, (*prog)->nbops + 1, 5); |
| 260 | for (i = 0; i < (*prog)->nbops; i++) { |
| 261 | newprog->ops[i] = (*prog)->ops[i]; |
| 262 | (*prog)->ops[i] = NULL; |
| 263 | } |
| 264 | newprog->ops[(*prog)->nbops] = new; |
| 265 | delelement (*prog); |
| 266 | (*prog) = newprog; |
| 267 | } while (*str == ','); |
| 268 | |
| 269 | if (*str != '}') { |
| 270 | delelement (root); |
| 271 | return ERROR_OP; |
| 272 | } |
| 273 | str++; |
| 274 | VERBOSE (DEBUG, fprintf (stdout, "stop processing brace\n")); |
| 275 | continue; |
| 276 | } |
| 277 | |
| 278 | /* check for open bracket */ |
| 279 | |
| 280 | if (*str == '(') { |
| 281 | VERBOSE (DEBUG, fprintf (stdout, "start processing bracket\n")); |
| 282 | if (root) { |
| 283 | do { |
| 284 | found = 0; |
| 285 | new = parser (str + 1, &str, 0); |
| 286 | if ((new == NULL) || ((new != ERROR_OP) && (new->prio == 9))) { |
| 287 | delelement (new); |
| 288 | new = ERROR_OP; |
| 289 | } |
| 290 | if ((new == NULL) || (new == ERROR_OP)) { |
| 291 | delelement (root); |
| 292 | return ERROR_OP; |
| 293 | } |
| 294 | for (i = 0; i < root->nbops; i++) { |
| 295 | if (root->ops[i] == NULL) { |
| 296 | root->ops[i] = new; |
| 297 | found = 1; |
| 298 | break; |
| 299 | } |
| 300 | } |
| 301 | if (!found) { |
| 302 | delelement (new); |
| 303 | delelement (root); |
| 304 | return ERROR_OP; |
| 305 | } |
| 306 | } while (*str == ','); |
| 307 | } else { |
| 308 | root = newelement (Val, 1, 5); |
| 309 | new = parser (str + 1, &str, 0); |
| 310 | if ((new == NULL) || ((new != ERROR_OP) && (new->prio == 9))) { |
| 311 | delelement (new); |
| 312 | new = ERROR_OP; |
| 313 | } |
| 314 | if ((new == NULL) || (new == ERROR_OP) || (*str == ',')) { |
| 315 | delelement (new); |
| 316 | delelement (root); |
| 317 | return ERROR_OP; |
| 318 | } |
| 319 | root->ops[0] = new; |
| 320 | } |
| 321 | if (*str != ')') { |
| 322 | delelement (root); |
| 323 | return ERROR_OP; |
| 324 | } |
| 325 | str++; |
| 326 | VERBOSE (DEBUG, fprintf (stdout, "stop processing bracket\n")); |
| 327 | continue; |
| 328 | } |
| 329 | |
| 330 | /* check for closing bracket, closing brace or koma */ |
| 331 | |
| 332 | if ((*str == ')') || (*str == '}') || (*str == ',')) { |
| 333 | if (prio == -9) { |
| 334 | delelement (root); |
| 335 | return ERROR_OP; |
| 336 | } |
| 337 | if (next != NULL) { |
| 338 | *next = str; |
| 339 | } |
| 340 | return root; |
| 341 | } |
| 342 | |
| 343 | /* look for operators */ |
| 344 | |
| 345 | for (i = 0; i < NB_OPERATORS; i++) { |
| 346 | keyword_t *operator = operators + i; |
| 347 | if (codecmp (operator->keyword, str) == 0) { |
| 348 | VERBOSE (DEBUG, fprintf (stdout, "start processing operator\n")); |
| 349 | if (root) { |
| 350 | if ((prio) && (prio > operator->prio)) { |
| 351 | VERBOSE (DEBUG, fprintf (stdout, "stop because operator priority\n")); |
| 352 | *next = str; |
| 353 | return root; |
| 354 | } |
| 355 | str += operator->offset; |
| 356 | VERBOSE (INFO, fprintf (stdout, "Oper: %d\n", operator->func)); |
| 357 | if (subparser (&root, &str, operator->func, operator->nbops, operator->prio) == ERROR_OP) { |
| 358 | delelement (root); |
| 359 | return ERROR_OP; |
| 360 | } |
| 361 | } else if (*str == '-') { |
| 362 | root = newelement (Sig, 1, 9); |
| 363 | } else { |
| 364 | return ERROR_OP; |
| 365 | } |
| 366 | found = 1; |
| 367 | VERBOSE (DEBUG, fprintf (stdout, "stop processing operator\n")); |
| 368 | break; |
| 369 | } |
| 370 | } |
| 371 | if (found) { |
| 372 | continue; |
| 373 | } |
| 374 | |
| 375 | /* look for functions */ |
| 376 | |
| 377 | for (i = 0; i < NB_FUNCTIONS; i++) { |
| 378 | keyword_t *function = functions + i; |
| 379 | if (codecmp (function->keyword, str) == 0) { |
| 380 | VERBOSE (DEBUG, fprintf (stdout, "start processing function\n")); |
| 381 | if (root == NULL) { |
| 382 | VERBOSE (INFO, fprintf (stdout, "Func: %d\n", function->func)); |
| 383 | root = newelement (function->func, function->nbops, function->prio); |
| 384 | } else { |
| 385 | delelement (root); |
| 386 | return ERROR_OP; |
| 387 | } |
| 388 | str += function->offset; |
| 389 | found = 1; |
| 390 | VERBOSE (DEBUG, fprintf (stdout, "stop processing function\n")); |
| 391 | break; |
| 392 | } |
| 393 | } |
| 394 | if (found) { |
| 395 | continue; |
| 396 | } |
| 397 | |
| 398 | /* look for constant */ |
| 399 | |
| 400 | for (i = 0; i < NB_CONSTANTS; i++) { |
| 401 | keyword_t *constant = constants + i; |
| 402 | if (codecmp (constant->keyword, str) == 0) { |
| 403 | VERBOSE (DEBUG, fprintf (stdout, "start processing constant\n")); |
| 404 | if (root == NULL) { |
| 405 | VERBOSE (INFO, fprintf (stdout, "Const: %d\n", constant->func)); |
| 406 | root = newelement (constant->func, constant->nbops, constant->prio); |
| 407 | } else { |
| 408 | delelement (root); |
| 409 | return ERROR_OP; |
| 410 | } |
| 411 | str += constant->offset; |
| 412 | found = 1; |
| 413 | VERBOSE (DEBUG, fprintf (stdout, "stop processing constant\n")); |
| 414 | break; |
| 415 | } |
| 416 | } |
| 417 | if (found) { |
| 418 | continue; |
| 419 | } |
| 420 | |
| 421 | /* look for number */ |
| 422 | |
| 423 | if (((*str >= '0') && (*str <= '9')) || |
| 424 | (*str == '.') || (*str == '+') || (*str == '-')) { |
| 425 | VERBOSE (DEBUG, fprintf (stdout, "start processing value\n")); |
| 426 | char *pt; |
| 427 | double value = strtod (str, &pt); |
| 428 | VERBOSE (INFO, fprintf (stdout, "Value: %f\n", value)); |
| 429 | if (str != pt) { |
| 430 | if ((root == NULL) || (root->prio == 6)) { |
| 431 | new = newelement (Val, 1, 5); |
| 432 | new->value = value; |
| 433 | if (root == NULL) { |
| 434 | root = new; |
| 435 | } else { |
| 436 | for (i = 0; i < root->nbops; i++) { |
| 437 | if (root->ops[i] == NULL) { |
| 438 | root->ops[i] = new; |
| 439 | found = 1; |
| 440 | break; |
| 441 | } |
| 442 | } |
| 443 | if (!found) { |
| 444 | delelement (new); |
| 445 | delelement (root); |
| 446 | return ERROR_OP; |
| 447 | } |
| 448 | } |
| 449 | str = pt; |
| 450 | } else if ((*str == '+') || (*str == '-')) { |
| 451 | if ((prio) && (prio > 1)) { |
| 452 | VERBOSE (DEBUG, fprintf (stdout, "stop because operator priority\n")); |
| 453 | *next = str; |
| 454 | return root; |
| 455 | } |
| 456 | if (subparser (&root, &str, Add, 2, 1) == ERROR_OP) { |
| 457 | delelement (root); |
| 458 | return ERROR_OP; |
| 459 | } |
| 460 | } else { |
| 461 | delelement (root); |
| 462 | return ERROR_OP; |
| 463 | } |
| 464 | found = 1; |
| 465 | } |
| 466 | VERBOSE (DEBUG, fprintf (stdout, "stop processing value\n")); |
| 467 | } |
| 468 | |
| 469 | /* error */ |
| 470 | |
| 471 | if (!found) { |
| 472 | delelement (root); |
| 473 | return ERROR_OP; |
| 474 | } |
| 475 | |
| 476 | } |
| 477 | |
| 478 | if (next != NULL) { |
| 479 | *next = str; |
| 480 | } |
| 481 | |
| 482 | /* save string */ |
| 483 | if (root != NULL) { |
| 484 | root->string = string; |
| 485 | } |
| 486 | |
| 487 | return root; |
| 488 | } |
| 489 | |
| 490 | /* print element tree */ |
| 491 | |
| 492 | void print_element (element_t *root, int level) |
| 493 | { |
| 494 | char *func = NULL; |
| 495 | int i; |
| 496 | |
| 497 | if ((root == NULL) || (root == ERROR_OP)) { |
| 498 | return; |
| 499 | } |
| 500 | |
| 501 | for (i = 0; i < level; i++) { |
| 502 | fprintf (stdout, " "); |
| 503 | } |
| 504 | |
| 505 | switch (root->func) { |
| 506 | case Val: func = "Value"; break; |
| 507 | case Sig: func = "Sign"; break; |
| 508 | case Add: func = "Addition"; break; |
| 509 | case Sub: func = "Subtraction"; break; |
| 510 | case Mul: func = "Multiplication"; break; |
| 511 | case Div: func = "Division"; break; |
| 512 | case Mod: func = "Modulo"; break; |
| 513 | case Pow: func = "Power"; break; |
| 514 | case Sqr: func = "Square Root"; break; |
| 515 | case Cos: func = "Cosine"; break; |
| 516 | case Sin: func = "Sine"; break; |
| 517 | case Tan: func = "Tangent"; break; |
| 518 | case Acos: func = "Arc Cosine"; break; |
| 519 | case Asin: func = "Arc Sine"; break; |
| 520 | case Atan: func = "Arc Tangent"; break; |
| 521 | case Log: func = "Logarithm"; break; |
| 522 | case Exp: func = "Exponantial"; break; |
| 523 | case Abs: func = "Absolute value"; break; |
| 524 | case Ceil: func = "Ceil value"; break; |
| 525 | case Floor: func = "Floor value"; break; |
| 526 | case Store: func = "Store"; break; |
| 527 | case Recall: func = "Recall"; break; |
| 528 | case Inc: func = "Increase"; break; |
| 529 | case Dec: func = "Decrease"; break; |
| 530 | case Disp: func = "Display"; break; |
| 531 | case Mem: func = "Memory"; break; |
| 532 | case Clear: func = "Clear"; break; |
| 533 | case Quit: func = "Quit"; break; |
| 534 | case Help: func = "Help"; break; |
| 535 | case Ans: func = "Ans"; break; |
| 536 | case Pi: func = "Pi"; break; |
| 537 | case E: func = "E"; break; |
| 538 | case Equal: func = "Equal"; break; |
| 539 | case Diff: func = "Different"; break; |
| 540 | case Ge: func = "Greater or equal"; break; |
| 541 | case Le: func = "Lesser or equal"; break; |
| 542 | case Gt: func = "Greater"; break; |
| 543 | case Lt: func = "Lesser"; break; |
| 544 | case And: func = "And"; break; |
| 545 | case Or: func = "Or"; break; |
| 546 | case Not: func = "Not"; break; |
| 547 | case Cond: func = "Condition"; break; |
| 548 | case While: func = "While"; break; |
| 549 | case Code: func = "Code"; break; |
| 550 | case Print: func = "Print"; break; |
| 551 | case Prog: func = "Program"; break; |
| 552 | case Call: func = "Call"; break; |
| 553 | case List: func = "List"; break; |
| 554 | case Edit: func = "Edit"; break; |
| 555 | case Del: func = "Del"; break; |
| 556 | } |
| 557 | |
| 558 | fprintf (stdout, "Function: %s\n", func); |
| 559 | |
| 560 | if ((root->func == Val) && (root->ops[0] == NULL)) { |
| 561 | for (i = 0; i < level; i++) { |
| 562 | fprintf (stdout, " "); |
| 563 | } |
| 564 | fprintf (stdout, "value: %f\n", root->value); |
| 565 | } else { |
| 566 | for (i = 0; i < root->nbops; i++) { |
| 567 | print_element (root->ops[i], level + 1); |
| 568 | } |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | /* storage functions */ |
| 573 | |
| 574 | void memory (int nb) |
| 575 | { |
| 576 | int i, l; |
| 577 | double *tmp = NULL; |
| 578 | if (nb != storage_size) { |
| 579 | l = (nb < storage_size) ? nb : storage_size; |
| 580 | tmp = (double *) callocordie (nb, sizeof (double)); |
| 581 | for (i = 0; i < l; i++) { |
| 582 | tmp[i] = storage[i]; |
| 583 | } |
| 584 | if (storage != NULL) { |
| 585 | free (storage); |
| 586 | } |
| 587 | storage = tmp; |
| 588 | storage_size = nb; |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | double store (int index, double value) |
| 593 | { |
| 594 | if (storage_size == -1) { |
| 595 | memory (DEFAULT_STORAGE_SIZE); |
| 596 | } |
| 597 | if ((index > 0) && (index <= storage_size)) { |
| 598 | storage[index - 1] = value; |
| 599 | } else { |
| 600 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [%d, %d]\n", index, (storage_size) ? 1 : 0, storage_size)); |
| 601 | } |
| 602 | return value; |
| 603 | } |
| 604 | |
| 605 | double recall (int index) |
| 606 | { |
| 607 | if (storage_size == -1) { |
| 608 | memory (DEFAULT_STORAGE_SIZE); |
| 609 | } |
| 610 | if ((index > 0) && (index <= storage_size)) { |
| 611 | return storage[index - 1]; |
| 612 | } else { |
| 613 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [%d, %d]\n", index, (storage_size) ? 1 : 0, storage_size)); |
| 614 | } |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | double increase (int index) |
| 619 | { |
| 620 | if (storage_size == -1) { |
| 621 | memory (DEFAULT_STORAGE_SIZE); |
| 622 | } |
| 623 | if ((index > 0) && (index <= storage_size)) { |
| 624 | return storage[index - 1]++; |
| 625 | } else { |
| 626 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [%d, %d]\n", index, (storage_size) ? 1 : 0, storage_size)); |
| 627 | } |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | double decrease (int index) |
| 632 | { |
| 633 | if (storage_size == -1) { |
| 634 | memory (DEFAULT_STORAGE_SIZE); |
| 635 | } |
| 636 | if ((index > 0) && (index <= storage_size)) { |
| 637 | return storage[index - 1]--; |
| 638 | } else { |
| 639 | VERBOSE (WARNING, fprintf (stdout, "invalid index (%d) [%d, %d]\n", index, (storage_size) ? 1 : 0, storage_size)); |
| 640 | } |
| 641 | return 0; |
| 642 | } |
| 643 | |
| 644 | void display (void) |
| 645 | { |
| 646 | int i; |
| 647 | if (storage_size == -1) { |
| 648 | memory (DEFAULT_STORAGE_SIZE); |
| 649 | } |
| 650 | fprintf (stdout, "storage:"); |
| 651 | for (i = 0; i < storage_size; i++) { |
| 652 | fprintf (stdout, " "); |
| 653 | fprintf (stdout, minform, storage[i]); |
| 654 | } |
| 655 | fprintf (stdout, "\n"); |
| 656 | } |
| 657 | |
| 658 | void clear () |
| 659 | { |
| 660 | int i; |
| 661 | for (i = 0; i < storage_size; i++) { |
| 662 | storage[i] = 0; |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | /* While do function */ |
| 667 | |
| 668 | double while_do (element_t *cond, element_t *action) |
| 669 | { |
| 670 | double ret = 0; |
| 671 | element_t *temp = NULL; |
| 672 | |
| 673 | VERBOSE (DEBUG, fprintf (stdout, "starting while loop\n")); |
| 674 | while (1) { |
| 675 | VERBOSE (DEBUG, fprintf (stdout, "loop...\n")); |
| 676 | |
| 677 | temp = dupelement (cond); |
| 678 | double test = evaluate_element (temp, 0); |
| 679 | delelement (temp); |
| 680 | if (!test) { |
| 681 | break; |
| 682 | } |
| 683 | if (action) { |
| 684 | temp = dupelement (action); |
| 685 | ret = evaluate_element (temp, 0); |
| 686 | delelement (temp); |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | VERBOSE (DEBUG, fprintf (stdout, "ending while loop\n")); |
| 691 | |
| 692 | return ret; |
| 693 | } |
| 694 | |
| 695 | /* program function */ |
| 696 | |
| 697 | double execute_code (element_t **prog, int nbcalls) |
| 698 | { |
| 699 | double ret = 0; |
| 700 | int i; |
| 701 | for (i = 0; i < nbcalls; i++) { |
| 702 | ret = evaluate_element (prog[i], 0); |
| 703 | prog[i] = NULL; |
| 704 | } |
| 705 | return ret; |
| 706 | } |
| 707 | |
| 708 | /* print function */ |
| 709 | |
| 710 | void set_format (char *prompt, int precision) |
| 711 | { |
| 712 | char buffer[128] = {0}; |
| 713 | free_format (); |
| 714 | sprintf (buffer, "%s%%.%dg\n", prompt, precision); |
| 715 | format = strdup (buffer); |
| 716 | sprintf (buffer, "%%.%dg", precision); |
| 717 | minform = strdup (buffer); |
| 718 | } |
| 719 | |
| 720 | void free_format () |
| 721 | { |
| 722 | if (format) { |
| 723 | free (format); |
| 724 | format = NULL; |
| 725 | } |
| 726 | if (minform) { |
| 727 | free (minform); |
| 728 | minform = NULL; |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | double print (double value) |
| 733 | { |
| 734 | fprintf (stdout, format ? format : DEFAULT_FORMAT, value); |
| 735 | fflush (stdout); |
| 736 | return value; |
| 737 | } |
| 738 | |
| 739 | /* quit function */ |
| 740 | |
| 741 | void quit (void) |
| 742 | { |
| 743 | fprintf (stdout, "bye\n"); |
| 744 | exit (0); |
| 745 | } |
| 746 | |
| 747 | /* program function */ |
| 748 | |
| 749 | void prog (int id, int nbmems, element_t *root) |
| 750 | { |
| 751 | int i, n = -1; |
| 752 | |
| 753 | if (programs == NULL) { |
| 754 | |
| 755 | /* initial memory allocation */ |
| 756 | programs = (workspace_t *) callocordie (1, sizeof (workspace_t)); |
| 757 | nb_programs = 1; |
| 758 | n = 0; |
| 759 | |
| 760 | } else { |
| 761 | |
| 762 | /* look for existing program */ |
| 763 | for (i = 0; i < nb_programs; i++) { |
| 764 | if ((programs + i)->id == id) { |
| 765 | n = i; |
| 766 | break; |
| 767 | } |
| 768 | } |
| 769 | if (n == -1) { |
| 770 | |
| 771 | /* new program */ |
| 772 | n = nb_programs++; |
| 773 | workspace_t *tmp = (workspace_t *) callocordie (nb_programs, sizeof (workspace_t)); |
| 774 | memcpy (tmp, programs, (nb_programs - 1) * sizeof (workspace_t)); |
| 775 | free (programs); |
| 776 | programs = tmp; |
| 777 | } else { |
| 778 | |
| 779 | /* clean old program */ |
| 780 | if ((programs + n)->storage) { |
| 781 | free ((programs + n)->storage); |
| 782 | } |
| 783 | if ((programs + n)->root) { |
| 784 | delelement ((programs + n)->root); |
| 785 | } |
| 786 | if ((programs + n)->string) { |
| 787 | free ((programs + n)->string); |
| 788 | (programs + n)->string = NULL; |
| 789 | } |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | /* set program */ |
| 794 | (programs + n)->id = id; |
| 795 | (programs + n)->answer = 0; |
| 796 | (programs + n)->storage = (double *) callocordie (nbmems, sizeof (double)); |
| 797 | (programs + n)->storage_size = nbmems; |
| 798 | (programs + n)->root = dupelement (root); |
| 799 | } |
| 800 | |
| 801 | double call (int id, int nbops, element_t **ops) |
| 802 | { |
| 803 | workspace_t tmp = {0}; |
| 804 | int i, n = -1; |
| 805 | double ret = 0; |
| 806 | |
| 807 | if (programs) { |
| 808 | |
| 809 | /* look for program */ |
| 810 | for (i = 0; i < nb_programs; i++) { |
| 811 | if ((programs + i)->id == id) { |
| 812 | n = i; |
| 813 | break; |
| 814 | } |
| 815 | } |
| 816 | } |
| 817 | if (n == -1) { |
| 818 | VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id)); |
| 819 | return 0; |
| 820 | } |
| 821 | |
| 822 | /* store context */ |
| 823 | tmp.answer = answer; |
| 824 | tmp.storage = storage; |
| 825 | tmp.storage_size = storage_size; |
| 826 | |
| 827 | /* change context */ |
| 828 | answer = 0; |
| 829 | storage = (programs + n)->storage; |
| 830 | storage_size = (programs + n)->storage_size; |
| 831 | if (nbops > storage_size) { |
| 832 | double *tmp = (double *) callocordie (nbops, sizeof (double)); |
| 833 | memcpy (tmp, storage, storage_size * sizeof (double)); |
| 834 | free (storage); |
| 835 | storage = tmp; |
| 836 | storage_size = nbops; |
| 837 | } |
| 838 | for (i = 0; i < nbops; i++) { |
| 839 | double val = evaluate_element (ops[i], 0); |
| 840 | store (i + 1, val); |
| 841 | } |
| 842 | |
| 843 | /* evaluate program */ |
| 844 | element_t *elements = dupelement ((programs + n)->root); |
| 845 | ret = evaluate_element (elements, 0); |
| 846 | delelement (elements); |
| 847 | |
| 848 | /* restore context */ |
| 849 | answer = tmp.answer; |
| 850 | storage = tmp.storage; |
| 851 | storage_size = tmp.storage_size; |
| 852 | |
| 853 | return ret; |
| 854 | } |
| 855 | |
| 856 | void list () |
| 857 | { |
| 858 | int i; |
| 859 | fprintf (stdout, "programs:"); |
| 860 | for (i = 0; i < nb_programs; i++) { |
| 861 | fprintf (stdout, " %d", (programs + i)->id); |
| 862 | } |
| 863 | fprintf (stdout, "\n"); |
| 864 | } |
| 865 | |
| 866 | void edit (int id) |
| 867 | { |
| 868 | int i, n = -1; |
| 869 | |
| 870 | if (programs) { |
| 871 | |
| 872 | /* look for program */ |
| 873 | for (i = 0; i < nb_programs; i++) { |
| 874 | if ((programs + i)->id == id) { |
| 875 | n = i; |
| 876 | break; |
| 877 | } |
| 878 | } |
| 879 | } |
| 880 | if (n == -1) { |
| 881 | VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id)); |
| 882 | return; |
| 883 | } |
| 884 | |
| 885 | /* set string program */ |
| 886 | fprintf (stdout, "edit: %s\n", (programs + n)->string); |
| 887 | } |
| 888 | |
| 889 | void savestring (int id, char *string) |
| 890 | { |
| 891 | int i, n = -1; |
| 892 | |
| 893 | if (programs) { |
| 894 | |
| 895 | /* look for program */ |
| 896 | for (i = 0; i < nb_programs; i++) { |
| 897 | if ((programs + i)->id == id) { |
| 898 | n = i; |
| 899 | break; |
| 900 | } |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | /* unnecesary code */ |
| 905 | //if (n == -1) { |
| 906 | // VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id)); |
| 907 | // return; |
| 908 | //} |
| 909 | //if ((programs + n)->string) { |
| 910 | // free ((programs + n)->string); |
| 911 | //} |
| 912 | |
| 913 | (programs + n)->string = strdup (string); |
| 914 | } |
| 915 | |
| 916 | void del (int id) |
| 917 | { |
| 918 | int i, j, n = -1; |
| 919 | |
| 920 | if (programs) { |
| 921 | |
| 922 | /* look for program */ |
| 923 | for (i = 0; i < nb_programs; i++) { |
| 924 | if ((programs + i)->id == id) { |
| 925 | n = i; |
| 926 | break; |
| 927 | } |
| 928 | } |
| 929 | } |
| 930 | if (n == -1) { |
| 931 | VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id)); |
| 932 | return; |
| 933 | } |
| 934 | |
| 935 | /* clean program */ |
| 936 | if ((programs + n)->storage) { |
| 937 | free ((programs + n)->storage); |
| 938 | } |
| 939 | if ((programs + n)->root) { |
| 940 | delelement ((programs + n)->root); |
| 941 | } |
| 942 | if ((programs + n)->string) { |
| 943 | free ((programs + n)->string); |
| 944 | } |
| 945 | |
| 946 | /* remove entry */ |
| 947 | workspace_t *tmp = (workspace_t *) callocordie (nb_programs - 1, sizeof (workspace_t)); |
| 948 | for (i = 0, j = 0; i < nb_programs; i++) { |
| 949 | if (i != n) { |
| 950 | memcpy (tmp + j, programs + i, sizeof (workspace_t)); |
| 951 | j++; |
| 952 | } |
| 953 | } |
| 954 | free (programs); |
| 955 | programs = tmp; |
| 956 | nb_programs--; |
| 957 | } |
| 958 | |
| 959 | /* help message */ |
| 960 | |
| 961 | void help (void) |
| 962 | { |
| 963 | fprintf (stdout, "calc is a simple calculator\n\n"); |
| 964 | fprintf (stdout, "supported operators:"); |
| 965 | fprintf (stdout, " + - * / %% ^\n"); |
| 966 | fprintf (stdout, "camparison operators:"); |
| 967 | fprintf (stdout, " == != >= <= > <\n"); |
| 968 | fprintf (stdout, "logical operators:"); |
| 969 | fprintf (stdout, " & | !\n"); |
| 970 | fprintf (stdout, "mathematic functions:"); |
| 971 | fprintf (stdout, " pow sqrt log exp\n"); |
| 972 | fprintf (stdout, "trig. func.:"); |
| 973 | fprintf (stdout, " cos sin tan acos asin atan\n"); |
| 974 | fprintf (stdout, "supported functions:"); |
| 975 | fprintf (stdout, " abs ceil floor\n"); |
| 976 | fprintf (stdout, "storage functions:"); |
| 977 | fprintf (stdout, " mem sto rcl inc dec disp\n"); |
| 978 | fprintf (stdout, "prog. functions:"); |
| 979 | fprintf (stdout, " cond while print {} ;\n"); |
| 980 | fprintf (stdout, "misc. functions:"); |
| 981 | fprintf (stdout, " quit help\n"); |
| 982 | fprintf (stdout, "supported constants:"); |
| 983 | fprintf (stdout, " e pi\n"); |
| 984 | } |
| 985 | |
| 986 | /* evaluate element tree */ |
| 987 | |
| 988 | #define MASK_SUB 0x1 |
| 989 | #define MASK_DIV 0x2 |
| 990 | |
| 991 | double evaluate_element (element_t *root, char mask) |
| 992 | { |
| 993 | double op0 = 0, op1 = 0; |
| 994 | char nextmask = mask; |
| 995 | int i, nb; |
| 996 | |
| 997 | if ((root == NULL) || (root == ERROR_OP)) { |
| 998 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating\n")); |
| 999 | return 0; |
| 1000 | } |
| 1001 | |
| 1002 | /* mask to manage sub operator sub and div */ |
| 1003 | switch (root->func) { |
| 1004 | case Add: |
| 1005 | nextmask &= ~MASK_SUB; |
| 1006 | nextmask &= ~MASK_DIV; |
| 1007 | break; |
| 1008 | case Sub: |
| 1009 | nextmask |= MASK_SUB; |
| 1010 | nextmask &= ~MASK_DIV; |
| 1011 | break; |
| 1012 | case Mul: |
| 1013 | nextmask &= ~MASK_DIV; |
| 1014 | break; |
| 1015 | case Div: |
| 1016 | nextmask |= MASK_DIV; |
| 1017 | break; |
| 1018 | default: |
| 1019 | nextmask = mask; |
| 1020 | } |
| 1021 | |
| 1022 | switch (root->func) { |
| 1023 | case Val: |
| 1024 | case Sig: |
| 1025 | op0 = (root->ops[0]) ? evaluate_element (root->ops[0], nextmask) : root->value; |
| 1026 | break; |
| 1027 | case Add: |
| 1028 | case Sub: |
| 1029 | case Mul: |
| 1030 | case Div: |
| 1031 | case Mod: |
| 1032 | case Pow: |
| 1033 | case Store: |
| 1034 | case Equal: |
| 1035 | case Diff: |
| 1036 | case Ge: |
| 1037 | case Le: |
| 1038 | case Gt: |
| 1039 | case Lt: |
| 1040 | case And: |
| 1041 | case Or: |
| 1042 | case Prog: |
| 1043 | if (root->ops[1]) { |
| 1044 | op1 = evaluate_element (root->ops[1], nextmask); |
| 1045 | } else if (root->func != Store) { |
| 1046 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating (op[1])\n")); |
| 1047 | return 0; |
| 1048 | } |
| 1049 | /* fallthrough */ |
| 1050 | case Sqr: |
| 1051 | case Cos: |
| 1052 | case Sin: |
| 1053 | case Tan: |
| 1054 | case Acos: |
| 1055 | case Asin: |
| 1056 | case Atan: |
| 1057 | case Log: |
| 1058 | case Exp: |
| 1059 | case Abs: |
| 1060 | case Ceil: |
| 1061 | case Floor: |
| 1062 | case Recall: |
| 1063 | case Inc: |
| 1064 | case Dec: |
| 1065 | case Not: |
| 1066 | case Mem: |
| 1067 | case Cond: |
| 1068 | case Call: |
| 1069 | case Edit: |
| 1070 | case Del: |
| 1071 | if (root->ops[0]) { |
| 1072 | op0 = evaluate_element (root->ops[0], 0); |
| 1073 | } else { |
| 1074 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating (op[0])\n")); |
| 1075 | return 0; |
| 1076 | } |
| 1077 | break; |
| 1078 | case Disp: |
| 1079 | case Clear: |
| 1080 | case Quit: |
| 1081 | case Help: |
| 1082 | case Ans: |
| 1083 | case Pi: |
| 1084 | case E: |
| 1085 | case Code: |
| 1086 | case List: |
| 1087 | break; |
| 1088 | case While: |
| 1089 | if (root->ops[0] == NULL) { |
| 1090 | VERBOSE (WARNING, fprintf (stdout, "error while evaluating (op[0])\n")); |
| 1091 | return 0; |
| 1092 | } |
| 1093 | break; |
| 1094 | case Print: |
| 1095 | op0 = (root->ops[0]) ? evaluate_element (root->ops[0], 0) : answer; |
| 1096 | break; |
| 1097 | } |
| 1098 | |
| 1099 | switch (root->func) { |
| 1100 | case Val: return op0; |
| 1101 | case Sig: return -op0; |
| 1102 | case Add: return ((mask & MASK_SUB) == 0) ? op0 + op1 : op0 - op1; |
| 1103 | case Sub: return ((mask & MASK_SUB) == 0) ? op0 - op1 : op0 + op1; |
| 1104 | case Mul: return ((mask & MASK_DIV) == 0) ? op0 * op1 : op0 / op1; |
| 1105 | case Div: return ((mask & MASK_DIV) == 0) ? op0 / op1 : op0 * op1; |
| 1106 | case Mod: return fmod (op0, op1); |
| 1107 | case Pow: return pow (op0, op1); |
| 1108 | case Sqr: return sqrt (op0); |
| 1109 | case Cos: return cos (op0); |
| 1110 | case Sin: return sin (op0); |
| 1111 | case Tan: return tan (op0); |
| 1112 | case Acos: return acos (op0); |
| 1113 | case Asin: return asin (op0); |
| 1114 | case Atan: return atan (op0); |
| 1115 | case Log: return log (op0); |
| 1116 | case Exp: return exp (op0); |
| 1117 | case Abs: return fabs (op0); |
| 1118 | case Ceil: return ceil (op0); |
| 1119 | case Floor: return floor (op0); |
| 1120 | case Store: return store ((int)op0, (op1) ? op1 : answer); |
| 1121 | case Recall: return recall ((int)op0); |
| 1122 | case Inc: return increase ((int)op0); |
| 1123 | case Dec: return decrease ((int)op0); |
| 1124 | case Disp: display (); break; |
| 1125 | case Mem: memory ((int)op0); break; |
| 1126 | case Clear: clear (); break; |
| 1127 | case Quit: quit (); break; |
| 1128 | case Help: help (); break; |
| 1129 | case Ans: return answer; |
| 1130 | case Pi: return M_PI; |
| 1131 | case E: return M_E; |
| 1132 | case Equal: return op0 == op1; |
| 1133 | case Diff: return op0 != op1; |
| 1134 | case Ge: return op0 >= op1; |
| 1135 | case Le: return op0 <= op1; |
| 1136 | case Gt: return op0 > op1; |
| 1137 | case Lt: return op0 < op1; |
| 1138 | case And: return (op0 != 0) && (op1 != 0); |
| 1139 | case Or: return (op0 != 0) || (op1 != 0); |
| 1140 | case Not: return (op0 == 0); |
| 1141 | case Cond: |
| 1142 | if ((op0) && (root->ops[1])) { |
| 1143 | return evaluate_element (root->ops[1], 0); |
| 1144 | } else if ((!op0) && (root->ops[2])) { |
| 1145 | return evaluate_element (root->ops[2], 0); |
| 1146 | } else { |
| 1147 | return 0; |
| 1148 | } |
| 1149 | case While: return while_do (root->ops[0], root->ops[1]); |
| 1150 | case Code: return execute_code (root->ops, root->nbops); |
| 1151 | case Print: return print (op0); |
| 1152 | case Prog: |
| 1153 | prog ((int)op0, (int)op1, root->ops[2]); |
| 1154 | savestring ((int)op0, root->string); |
| 1155 | break; |
| 1156 | case Call: |
| 1157 | for (i = 1, nb =0; i < root->nbops; i++) { |
| 1158 | if (root->ops[i]) { |
| 1159 | nb++; |
| 1160 | } |
| 1161 | } |
| 1162 | return call ((int)op0, nb, root->ops + 1); |
| 1163 | case List: list (); break; |
| 1164 | case Edit: edit ((int)op0); break; |
| 1165 | case Del: del ((int)op0); break; |
| 1166 | } |
| 1167 | |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | char **generate_completion_list () |
| 1172 | { |
| 1173 | int i, j, l = 0; |
| 1174 | char **list = (char **) callocordie (NB_OPERATORS + NB_FUNCTIONS + NB_CONSTANTS + NB_SYMBOLS + 1, sizeof (char *)); |
| 1175 | |
| 1176 | for (i = 0; i < NB_OPERATORS; i++) { |
| 1177 | list[l] = strdup ((operators + i)->keyword); |
| 1178 | for (j = 0; j < (int)strlen (list[l]); j++) { |
| 1179 | if (list[i][j] == '\t') { |
| 1180 | list[i][j] = '\0'; |
| 1181 | } |
| 1182 | } |
| 1183 | if (list[l] != NULL) { |
| 1184 | l++; |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | for (i = 0; i < NB_FUNCTIONS; i++) { |
| 1189 | list[l] = strdup ((functions + i)->keyword); |
| 1190 | if (list[l] != NULL) { |
| 1191 | l++; |
| 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | for (i = 0; i < NB_CONSTANTS; i++) { |
| 1196 | list[l] = strdup ((constants + i)->keyword); |
| 1197 | if (list[l] != NULL) { |
| 1198 | l++; |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | for (i = 0; i < NB_SYMBOLS; i++) { |
| 1203 | list[l] = strdup (symbols[i]); |
| 1204 | if (list[l] != NULL) { |
| 1205 | l++; |
| 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | return (list); |
| 1210 | } |
| 1211 | |
| 1212 | void free_completion_list (char **list) |
| 1213 | { |
| 1214 | int i; |
| 1215 | |
| 1216 | if (list) { |
| 1217 | for (i = 0; i < NB_OPERATORS + NB_FUNCTIONS + NB_CONSTANTS + NB_SYMBOLS + 1; i++) { |
| 1218 | if (list[i] != NULL) { |
| 1219 | free (list[i]); |
| 1220 | } |
| 1221 | } |
| 1222 | free (list); |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | /* vim: set ts=4 sw=4 et: */ |