| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wxexpr.cpp |
| 3 | // Purpose: wxExpr |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart and Markus Holzem |
| 9 | // Licence: wxWindows license |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "wxexpr.h" |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx/wx.h". |
| 17 | #include "wx/wxprec.h" |
| 18 | |
| 19 | #ifdef __BORLANDC__ |
| 20 | #pragma hdrstop |
| 21 | #endif |
| 22 | |
| 23 | #if wxUSE_IOSTREAMH |
| 24 | #include <fstream.h> |
| 25 | #else |
| 26 | #include <fstream> |
| 27 | #endif |
| 28 | |
| 29 | #include <stdarg.h> |
| 30 | #include <ctype.h> |
| 31 | #include <string.h> |
| 32 | |
| 33 | #include "wx/utils.h" |
| 34 | |
| 35 | #include "wx/expr.h" |
| 36 | #include "wx/wxexpr.h" |
| 37 | |
| 38 | extern "C" void add_expr(char *); |
| 39 | extern "C" void LexFromFile(FILE *fd); |
| 40 | extern "C" void LexFromString(char *buf); |
| 41 | |
| 42 | |
| 43 | wxExprDatabase *thewxExprDatabase = NULL; |
| 44 | wxExprErrorHandler currentwxExprErrorHandler; |
| 45 | |
| 46 | wxExpr::wxExpr(const wxString& functor) |
| 47 | { |
| 48 | type = wxExprList; |
| 49 | next = NULL; |
| 50 | last = NULL; |
| 51 | value.first = NULL; |
| 52 | |
| 53 | wxExpr *pfunctor = new wxExpr(wxExprWord, functor); |
| 54 | Append(pfunctor); |
| 55 | client_data = NULL; |
| 56 | } |
| 57 | |
| 58 | wxExpr::wxExpr(wxExprType the_type, const wxString& word_or_string) |
| 59 | { |
| 60 | type = the_type; |
| 61 | |
| 62 | switch (the_type) |
| 63 | { |
| 64 | case wxExprWord: |
| 65 | value.word = copystring((const char *)word_or_string); |
| 66 | break; |
| 67 | case wxExprString: |
| 68 | value.string = copystring((const char *)word_or_string); |
| 69 | break; |
| 70 | case wxExprList: |
| 71 | last = NULL; |
| 72 | value.first = NULL; |
| 73 | break; |
| 74 | case wxExprReal: |
| 75 | case wxExprInteger: |
| 76 | case wxExprNull: |
| 77 | break; |
| 78 | } |
| 79 | client_data = NULL; |
| 80 | next = NULL; |
| 81 | } |
| 82 | |
| 83 | wxExpr::wxExpr(wxExprType the_type, char *word_or_string, bool allocate) |
| 84 | { |
| 85 | type = the_type; |
| 86 | |
| 87 | switch (the_type) |
| 88 | { |
| 89 | case wxExprWord: |
| 90 | value.word = allocate ? copystring(word_or_string) : word_or_string; |
| 91 | break; |
| 92 | case wxExprString: |
| 93 | value.string = allocate ? copystring(word_or_string) : word_or_string; |
| 94 | break; |
| 95 | case wxExprList: |
| 96 | last = NULL; |
| 97 | value.first = NULL; |
| 98 | break; |
| 99 | case wxExprReal: |
| 100 | case wxExprInteger: |
| 101 | case wxExprNull: |
| 102 | break; |
| 103 | } |
| 104 | client_data = NULL; |
| 105 | next = NULL; |
| 106 | } |
| 107 | |
| 108 | wxExpr::wxExpr(long the_integer) |
| 109 | { |
| 110 | type = wxExprInteger; |
| 111 | value.integer = the_integer; |
| 112 | client_data = NULL; |
| 113 | next = NULL; |
| 114 | } |
| 115 | |
| 116 | wxExpr::wxExpr(double the_real) |
| 117 | { |
| 118 | type = wxExprReal; |
| 119 | value.real = the_real; |
| 120 | client_data = NULL; |
| 121 | next = NULL; |
| 122 | } |
| 123 | |
| 124 | wxExpr::wxExpr(wxList *the_list) |
| 125 | { |
| 126 | type = wxExprList; |
| 127 | client_data = NULL; |
| 128 | last = NULL; |
| 129 | value.first = NULL; |
| 130 | |
| 131 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 132 | |
| 133 | wxNode *node = the_list->First(); |
| 134 | while (node) |
| 135 | { |
| 136 | wxExpr *expr = (wxExpr *)node->Data(); |
| 137 | listExpr->Append(expr); |
| 138 | node = node->Next(); |
| 139 | } |
| 140 | Append(listExpr); |
| 141 | |
| 142 | delete the_list; |
| 143 | } |
| 144 | |
| 145 | wxExpr::~wxExpr(void) |
| 146 | { |
| 147 | switch (type) |
| 148 | { |
| 149 | case wxExprInteger: |
| 150 | case wxExprReal: |
| 151 | { |
| 152 | break; |
| 153 | } |
| 154 | case wxExprString: |
| 155 | { |
| 156 | delete[] value.string; |
| 157 | break; |
| 158 | } |
| 159 | case wxExprWord: |
| 160 | { |
| 161 | delete[] value.word; |
| 162 | break; |
| 163 | } |
| 164 | case wxExprList: |
| 165 | { |
| 166 | wxExpr *expr = value.first; |
| 167 | while (expr) |
| 168 | { |
| 169 | wxExpr *expr1 = expr->next; |
| 170 | |
| 171 | delete expr; |
| 172 | expr = expr1; |
| 173 | } |
| 174 | break; |
| 175 | } |
| 176 | case wxExprNull: break; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | void wxExpr::Append(wxExpr *expr) |
| 181 | { |
| 182 | if (!value.first) |
| 183 | value.first = expr; |
| 184 | |
| 185 | if (last) |
| 186 | last->next = expr; |
| 187 | last = expr; |
| 188 | } |
| 189 | |
| 190 | void wxExpr::Insert(wxExpr *expr) |
| 191 | { |
| 192 | expr->next = value.first; |
| 193 | value.first = expr; |
| 194 | |
| 195 | if (!last) |
| 196 | last = expr; |
| 197 | } |
| 198 | |
| 199 | wxExpr *wxExpr::Copy(void) const |
| 200 | { |
| 201 | // This seems to get round an optimizer bug when |
| 202 | // using Watcom C++ 10a in WIN32 compilation mode. |
| 203 | // If these lines not present, the type seems to be |
| 204 | // interpreted wrongly as an integer. |
| 205 | // I don't want to turn optimization off since it's needed |
| 206 | // for reading in files quickly. |
| 207 | #if defined(__WATCOMC__) |
| 208 | char buf[2]; |
| 209 | sprintf(buf, ""); |
| 210 | #endif |
| 211 | |
| 212 | switch (type) |
| 213 | { |
| 214 | case wxExprInteger: |
| 215 | return new wxExpr(value.integer); |
| 216 | case wxExprReal: |
| 217 | return new wxExpr(value.real); |
| 218 | case wxExprString: |
| 219 | return new wxExpr(wxExprString, wxString(value.string)); |
| 220 | case wxExprWord: |
| 221 | return new wxExpr(wxExprWord, wxString(value.word)); |
| 222 | case wxExprList: |
| 223 | { |
| 224 | wxExpr *expr = value.first; |
| 225 | wxExpr *new_list = new wxExpr(wxExprList); |
| 226 | while (expr) |
| 227 | { |
| 228 | wxExpr *expr2 = expr->Copy(); |
| 229 | new_list->Append(expr2); |
| 230 | expr = expr->next; |
| 231 | } |
| 232 | return new_list; |
| 233 | } |
| 234 | case wxExprNull: |
| 235 | break; |
| 236 | } |
| 237 | return NULL; |
| 238 | } |
| 239 | |
| 240 | |
| 241 | // Get the wxExpr (containing (= wxExpr Value) form) for the given word |
| 242 | // or string, assuming that we have Attribute=Value, ... |
| 243 | wxExpr *wxExpr::GetAttributeValueNode(const wxString& word) const // Use only for a clause or list |
| 244 | { |
| 245 | if (type != wxExprList) |
| 246 | return NULL; |
| 247 | |
| 248 | wxExpr *expr = value.first; |
| 249 | while (expr) |
| 250 | { |
| 251 | if (expr->type == wxExprList) |
| 252 | { |
| 253 | wxExpr *firstNode = expr->value.first; |
| 254 | if ((firstNode->type == wxExprWord) && (firstNode->value.word[0] == '=')) |
| 255 | { |
| 256 | wxExpr *secondNode = firstNode->next; |
| 257 | if ((secondNode->type == wxExprWord) && |
| 258 | (strcmp((const char *)word, secondNode->value.word) == 0)) |
| 259 | { |
| 260 | return expr; |
| 261 | } |
| 262 | } |
| 263 | } |
| 264 | expr = expr->next; |
| 265 | } |
| 266 | return NULL; |
| 267 | } |
| 268 | |
| 269 | // Get the value (in wxExpr form) for the given word or string, assuming |
| 270 | // that we have Attribute=Value, ... |
| 271 | wxExpr *wxExpr::AttributeValue(const wxString& word) const // Use only for a clause or list |
| 272 | { |
| 273 | if (type != wxExprList) |
| 274 | return NULL; |
| 275 | |
| 276 | wxExpr *attExpr = GetAttributeValueNode(word); |
| 277 | if (attExpr && attExpr->value.first && attExpr->value.first->next) |
| 278 | return attExpr->value.first->next->next; |
| 279 | else return NULL; |
| 280 | } |
| 281 | |
| 282 | wxString wxExpr::Functor(void) const // Use only for a clause |
| 283 | { |
| 284 | if ((type != wxExprList) || !value.first) |
| 285 | return wxString(""); |
| 286 | |
| 287 | if (value.first->type == wxExprWord) |
| 288 | return wxString(value.first->value.word); |
| 289 | else |
| 290 | return wxString(""); |
| 291 | } |
| 292 | |
| 293 | bool wxExpr::IsFunctor(const wxString& f) const // Use only for a clause |
| 294 | { |
| 295 | if ((type != wxExprList) || !value.first) |
| 296 | return FALSE; |
| 297 | |
| 298 | return (value.first->type == wxExprWord && |
| 299 | (strcmp((const char *)f, value.first->value.word) == 0)); |
| 300 | } |
| 301 | |
| 302 | // Return nth argument of a clause (starting from 1) |
| 303 | wxExpr *wxExpr::Arg(wxExprType theType, int arg) const |
| 304 | { |
| 305 | wxExpr *expr = value.first; |
| 306 | int i; |
| 307 | for (i = 1; i < arg; i++) |
| 308 | if (expr) |
| 309 | expr = expr->next; |
| 310 | |
| 311 | if (expr && (expr->type == theType)) |
| 312 | return expr; |
| 313 | else |
| 314 | return NULL; |
| 315 | } |
| 316 | |
| 317 | // Return nth argument of a list expression (starting from zero) |
| 318 | wxExpr *wxExpr::Nth(int arg) const |
| 319 | { |
| 320 | if (type != wxExprList) |
| 321 | return NULL; |
| 322 | |
| 323 | wxExpr *expr = value.first; |
| 324 | int i; |
| 325 | for (i = 0; i < arg; i++) |
| 326 | if (expr) |
| 327 | expr = expr->next; |
| 328 | else return NULL; |
| 329 | |
| 330 | if (expr) |
| 331 | return expr; |
| 332 | else |
| 333 | return NULL; |
| 334 | } |
| 335 | |
| 336 | // Returns the number of elements in a list expression |
| 337 | int wxExpr::Number(void) const |
| 338 | { |
| 339 | if (type != wxExprList) |
| 340 | return 0; |
| 341 | |
| 342 | int i = 0; |
| 343 | wxExpr *expr = value.first; |
| 344 | while (expr) |
| 345 | { |
| 346 | expr = expr->next; |
| 347 | i ++; |
| 348 | } |
| 349 | return i; |
| 350 | } |
| 351 | |
| 352 | void wxExpr::DeleteAttributeValue(const wxString& attribute) |
| 353 | { |
| 354 | if (type != wxExprList) |
| 355 | return; |
| 356 | |
| 357 | wxExpr *expr = value.first; |
| 358 | wxExpr *lastExpr = this; |
| 359 | while (expr) |
| 360 | { |
| 361 | if (expr->type == wxExprList) |
| 362 | { |
| 363 | wxExpr *firstNode = expr->value.first; |
| 364 | if ((firstNode->type == wxExprWord) && (firstNode->value.word[0] == '=')) |
| 365 | { |
| 366 | wxExpr *secondNode = firstNode->next; |
| 367 | if ((secondNode->type == wxExprWord) && |
| 368 | (strcmp((const char *)attribute, secondNode->value.word) == 0)) |
| 369 | { |
| 370 | wxExpr *nextExpr = expr->next; |
| 371 | delete expr; |
| 372 | |
| 373 | lastExpr->next = nextExpr; |
| 374 | |
| 375 | if (last == expr) |
| 376 | last = lastExpr; |
| 377 | |
| 378 | return; |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | lastExpr = expr; |
| 383 | expr = expr->next; |
| 384 | } |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | void wxExpr::AddAttributeValue(const wxString& attribute, wxExpr *val) |
| 389 | { |
| 390 | if (type != wxExprList) |
| 391 | { |
| 392 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 393 | return; |
| 394 | } |
| 395 | // Warning - existing code may assume that any existing value |
| 396 | // is deleted first. For efficiency, we leave this to the application. |
| 397 | // DeleteAttributeValue(attribute); |
| 398 | |
| 399 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 400 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 401 | |
| 402 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 403 | |
| 404 | listExpr->Append(pequals); |
| 405 | listExpr->Append(patt); |
| 406 | listExpr->Append(val); |
| 407 | |
| 408 | Append(listExpr); |
| 409 | } |
| 410 | |
| 411 | void wxExpr::AddAttributeValue(const wxString& attribute, long val) |
| 412 | { |
| 413 | if (type != wxExprList) |
| 414 | { |
| 415 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 416 | return; |
| 417 | } |
| 418 | // Warning - existing code may assume that any existing value |
| 419 | // is deleted first. For efficiency, we leave this to the application. |
| 420 | // DeleteAttributeValue(attribute); |
| 421 | |
| 422 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 423 | wxExpr *pval = new wxExpr(val); |
| 424 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 425 | |
| 426 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 427 | |
| 428 | listExpr->Append(pequals); |
| 429 | listExpr->Append(patt); |
| 430 | listExpr->Append(pval); |
| 431 | |
| 432 | Append(listExpr); |
| 433 | } |
| 434 | |
| 435 | void wxExpr::AddAttributeValue(const wxString& attribute, double val) |
| 436 | { |
| 437 | if (type != wxExprList) |
| 438 | { |
| 439 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | // DeleteAttributeValue(attribute); |
| 444 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 445 | wxExpr *pval = new wxExpr(val); |
| 446 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 447 | |
| 448 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 449 | |
| 450 | listExpr->Append(pequals); |
| 451 | listExpr->Append(patt); |
| 452 | listExpr->Append(pval); |
| 453 | |
| 454 | Append(listExpr); |
| 455 | } |
| 456 | |
| 457 | void wxExpr::AddAttributeValueString(const wxString& attribute, const wxString& val) |
| 458 | { |
| 459 | if (type != wxExprList) |
| 460 | { |
| 461 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | // DeleteAttributeValue(attribute); |
| 466 | |
| 467 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 468 | wxExpr *pval = new wxExpr(wxExprString, val); |
| 469 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 470 | |
| 471 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 472 | |
| 473 | listExpr->Append(pequals); |
| 474 | listExpr->Append(patt); |
| 475 | listExpr->Append(pval); |
| 476 | |
| 477 | Append(listExpr); |
| 478 | } |
| 479 | |
| 480 | void wxExpr::AddAttributeValueWord(const wxString& attribute, const wxString& val) |
| 481 | { |
| 482 | if (type != wxExprList) |
| 483 | { |
| 484 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 485 | return; |
| 486 | } |
| 487 | |
| 488 | // DeleteAttributeValue(attribute); |
| 489 | |
| 490 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 491 | wxExpr *pval = new wxExpr(wxExprWord, val); |
| 492 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 493 | |
| 494 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 495 | |
| 496 | listExpr->Append(pequals); |
| 497 | listExpr->Append(patt); |
| 498 | listExpr->Append(pval); |
| 499 | |
| 500 | Append(listExpr); |
| 501 | } |
| 502 | |
| 503 | void wxExpr::AddAttributeValue(const wxString& attribute, wxList *val) |
| 504 | { |
| 505 | if (type != wxExprList) |
| 506 | { |
| 507 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 508 | return; |
| 509 | } |
| 510 | if (!val) |
| 511 | return; |
| 512 | |
| 513 | // DeleteAttributeValue(attribute); |
| 514 | |
| 515 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 516 | wxExpr *pval = new wxExpr(val); |
| 517 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 518 | |
| 519 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 520 | |
| 521 | listExpr->Append(pequals); |
| 522 | listExpr->Append(patt); |
| 523 | listExpr->Append(pval); |
| 524 | |
| 525 | Append(listExpr); |
| 526 | } |
| 527 | |
| 528 | void wxExpr::AddAttributeValueStringList(const wxString& attribute, wxList *string_list) |
| 529 | { |
| 530 | if (type != wxExprList) |
| 531 | { |
| 532 | // cout << "Error! tried to add an attribute-value pair to a nonlist wxExpr expression\n"; |
| 533 | return; |
| 534 | } |
| 535 | if (!string_list) |
| 536 | return; |
| 537 | |
| 538 | // DeleteAttributeValue(attribute); |
| 539 | |
| 540 | // First make a list of wxExpr strings |
| 541 | wxExpr *listExpr = new wxExpr(wxExprList); |
| 542 | wxNode *node = string_list->First(); |
| 543 | while (node) |
| 544 | { |
| 545 | char *string = (char *)node->Data(); |
| 546 | wxExpr *expr = new wxExpr(wxExprString, wxString(string)); |
| 547 | listExpr->Append(expr); |
| 548 | node = node->Next(); |
| 549 | } |
| 550 | |
| 551 | // Now make an (=, Att, Value) triple |
| 552 | wxExpr *patt = new wxExpr(wxExprWord, attribute); |
| 553 | wxExpr *pequals = new wxExpr(wxExprWord, "="); |
| 554 | |
| 555 | wxExpr *listExpr2 = new wxExpr(wxExprList); |
| 556 | |
| 557 | listExpr2->Append(pequals); |
| 558 | listExpr2->Append(patt); |
| 559 | listExpr2->Append(listExpr); |
| 560 | |
| 561 | Append(listExpr2); |
| 562 | } |
| 563 | |
| 564 | bool wxExpr::GetAttributeValue(const wxString& att, int& var) const |
| 565 | { |
| 566 | wxExpr *expr = AttributeValue(att); |
| 567 | |
| 568 | if (expr && (expr->Type() == wxExprInteger || expr->Type() == wxExprReal)) |
| 569 | { |
| 570 | var = (int)(expr->IntegerValue()); |
| 571 | return TRUE; |
| 572 | } |
| 573 | else |
| 574 | return FALSE; |
| 575 | } |
| 576 | |
| 577 | bool wxExpr::GetAttributeValue(const wxString& att, long& var) const |
| 578 | { |
| 579 | wxExpr *expr = AttributeValue(att); |
| 580 | |
| 581 | if (expr && (expr->Type() == wxExprInteger || expr->Type() == wxExprReal)) |
| 582 | { |
| 583 | var = expr->IntegerValue(); |
| 584 | return TRUE; |
| 585 | } |
| 586 | else |
| 587 | return FALSE; |
| 588 | } |
| 589 | |
| 590 | bool wxExpr::GetAttributeValue(const wxString& att, float& var) const |
| 591 | { |
| 592 | wxExpr *expr = AttributeValue(att); |
| 593 | if (expr && (expr->Type() == wxExprInteger || expr->Type() == wxExprReal)) |
| 594 | { |
| 595 | var = (float) expr->RealValue(); |
| 596 | return TRUE; |
| 597 | } |
| 598 | else |
| 599 | return FALSE; |
| 600 | } |
| 601 | |
| 602 | bool wxExpr::GetAttributeValue(const wxString& att, double& var) const |
| 603 | { |
| 604 | wxExpr *expr = AttributeValue(att); |
| 605 | if (expr && (expr->Type() == wxExprInteger || expr->Type() == wxExprReal)) |
| 606 | { |
| 607 | var = expr->RealValue(); |
| 608 | return TRUE; |
| 609 | } |
| 610 | else |
| 611 | return FALSE; |
| 612 | } |
| 613 | |
| 614 | bool wxExpr::GetAttributeValue(const wxString& att, wxString& var) const // Word OR string -> string |
| 615 | { |
| 616 | wxExpr *expr = AttributeValue(att); |
| 617 | if (expr && expr->Type() == wxExprWord) |
| 618 | { |
| 619 | var = expr->WordValue(); |
| 620 | return TRUE; |
| 621 | } |
| 622 | else if (expr && expr->Type() == wxExprString) |
| 623 | { |
| 624 | var = expr->StringValue(); |
| 625 | return TRUE; |
| 626 | } |
| 627 | else |
| 628 | return FALSE; |
| 629 | } |
| 630 | |
| 631 | bool wxExpr::GetAttributeValue(const wxString& att, wxExpr **var) const |
| 632 | { |
| 633 | wxExpr *expr = AttributeValue(att); |
| 634 | if (expr) |
| 635 | { |
| 636 | *var = expr; |
| 637 | return TRUE; |
| 638 | } |
| 639 | else |
| 640 | return FALSE; |
| 641 | } |
| 642 | |
| 643 | bool wxExpr::GetAttributeValueStringList(const wxString& att, wxList *var) const |
| 644 | { |
| 645 | wxExpr *expr = AttributeValue(att); |
| 646 | if (expr && expr->Type() == wxExprList) |
| 647 | { |
| 648 | wxExpr *string_expr = expr->value.first; |
| 649 | while (string_expr) |
| 650 | { |
| 651 | if (string_expr->Type() == wxExprString) |
| 652 | var->Append((wxObject *)copystring(string_expr->StringValue())); |
| 653 | |
| 654 | string_expr = string_expr->next; |
| 655 | } |
| 656 | return TRUE; |
| 657 | } |
| 658 | else |
| 659 | return FALSE; |
| 660 | } |
| 661 | |
| 662 | // Compatibility |
| 663 | void wxExpr::AssignAttributeValue(char *att, char **var) const |
| 664 | { |
| 665 | wxString str; |
| 666 | if (GetAttributeValue(att, str)) |
| 667 | { |
| 668 | if (*var) |
| 669 | delete[] *var; |
| 670 | *var = copystring((const char *) str); |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | void wxExpr::WriteClause(ostream& stream) // Write this expression as a top-level clause |
| 675 | { |
| 676 | if (type != wxExprList) |
| 677 | return; |
| 678 | |
| 679 | wxExpr *node = value.first; |
| 680 | if (node) |
| 681 | { |
| 682 | node->WriteExpr(stream); |
| 683 | stream << "("; |
| 684 | node = node->next; |
| 685 | bool first = TRUE; |
| 686 | while (node) |
| 687 | { |
| 688 | if (!first) |
| 689 | stream << " "; |
| 690 | node->WriteExpr(stream); |
| 691 | node = node->next; |
| 692 | if (node) stream << ",\n"; |
| 693 | first = FALSE; |
| 694 | } |
| 695 | stream << ").\n\n"; |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | void wxExpr::WriteExpr(ostream& stream) // Write as any other subexpression |
| 700 | { |
| 701 | // This seems to get round an optimizer bug when |
| 702 | // using Watcom C++ 10a in WIN32 compilation mode. |
| 703 | // If these lines not present, the type seems to be |
| 704 | // interpreted wrongly as an integer. |
| 705 | // I don't want to turn optimization off since it's needed |
| 706 | // for reading in files quickly. |
| 707 | #if defined(__WATCOMC__) |
| 708 | char buf[2]; |
| 709 | sprintf(buf, ""); |
| 710 | #endif |
| 711 | |
| 712 | switch (type) |
| 713 | { |
| 714 | case wxExprInteger: |
| 715 | { |
| 716 | stream << value.integer; |
| 717 | break; |
| 718 | } |
| 719 | case wxExprReal: |
| 720 | { |
| 721 | double f = value.real; |
| 722 | /* Now the parser can cope with this. |
| 723 | // Prevent printing in 'e' notation. Any better way? |
| 724 | if (fabs(f) < 0.00001) |
| 725 | f = 0.0; |
| 726 | */ |
| 727 | char buf[40]; |
| 728 | sprintf(buf, "%.6g", f); |
| 729 | stream << buf; |
| 730 | break; |
| 731 | } |
| 732 | case wxExprString: |
| 733 | { |
| 734 | stream << "\""; |
| 735 | int i; |
| 736 | int len = strlen(value.string); |
| 737 | for (i = 0; i < len; i++) |
| 738 | { |
| 739 | char ch = value.string[i]; |
| 740 | if (ch == '"' || ch == '\\') |
| 741 | stream << "\\"; |
| 742 | stream << ch; |
| 743 | } |
| 744 | |
| 745 | stream << "\""; |
| 746 | break; |
| 747 | } |
| 748 | case wxExprWord: |
| 749 | { |
| 750 | bool quote_it = FALSE; |
| 751 | int len = strlen(value.word); |
| 752 | if ((len == 0) || (len > 0 && (value.word[0] > 64 && value.word[0] < 91))) |
| 753 | quote_it = TRUE; |
| 754 | else |
| 755 | { |
| 756 | int i; |
| 757 | for (i = 0; i < len; i++) |
| 758 | if ((!isalpha(value.word[i])) && (!isdigit(value.word[i])) && |
| 759 | (value.word[i] != '_')) |
| 760 | { quote_it = TRUE; i = len; } |
| 761 | } |
| 762 | |
| 763 | if (quote_it) |
| 764 | stream << "'"; |
| 765 | |
| 766 | stream << value.word; |
| 767 | |
| 768 | if (quote_it) |
| 769 | stream << "'"; |
| 770 | |
| 771 | break; |
| 772 | } |
| 773 | case wxExprList: |
| 774 | { |
| 775 | if (!value.first) |
| 776 | stream << "[]"; |
| 777 | else |
| 778 | { |
| 779 | wxExpr *expr = value.first; |
| 780 | |
| 781 | if ((expr->Type() == wxExprWord) && (strcmp(expr->WordValue(), "=") == 0)) |
| 782 | { |
| 783 | wxExpr *arg1 = expr->next; |
| 784 | wxExpr *arg2 = arg1->next; |
| 785 | arg1->WriteExpr(stream); |
| 786 | stream << " = "; |
| 787 | arg2->WriteExpr(stream); |
| 788 | } |
| 789 | else |
| 790 | { |
| 791 | stream << "["; |
| 792 | while (expr) |
| 793 | { |
| 794 | expr->WriteExpr(stream); |
| 795 | expr = expr->next; |
| 796 | if (expr) stream << ", "; |
| 797 | } |
| 798 | stream << "]"; |
| 799 | } |
| 800 | } |
| 801 | break; |
| 802 | } |
| 803 | case wxExprNull: break; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | void wxExpr::WriteLispExpr(ostream& stream) |
| 808 | { |
| 809 | switch (type) |
| 810 | { |
| 811 | case wxExprInteger: |
| 812 | { |
| 813 | stream << value.integer; |
| 814 | break; |
| 815 | } |
| 816 | case wxExprReal: |
| 817 | { |
| 818 | stream << value.real; |
| 819 | break; |
| 820 | } |
| 821 | case wxExprString: |
| 822 | { |
| 823 | stream << "\"" << value.string << "\""; |
| 824 | break; |
| 825 | } |
| 826 | case wxExprWord: |
| 827 | { |
| 828 | stream << value.word; |
| 829 | break; |
| 830 | } |
| 831 | case wxExprList: |
| 832 | { |
| 833 | wxExpr *expr = value.first; |
| 834 | |
| 835 | stream << "("; |
| 836 | while (expr) |
| 837 | { |
| 838 | expr->WriteLispExpr(stream); |
| 839 | expr = expr->next; |
| 840 | if (expr) stream << " "; |
| 841 | } |
| 842 | |
| 843 | stream << ")"; |
| 844 | break; |
| 845 | } |
| 846 | case wxExprNull: break; |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | /* |
| 851 | * wxExpr 'database' (list of expressions) |
| 852 | */ |
| 853 | |
| 854 | #if !USE_SHARED_LIBRARIES |
| 855 | IMPLEMENT_DYNAMIC_CLASS(wxExprDatabase, wxList) |
| 856 | #endif |
| 857 | |
| 858 | wxExprDatabase::wxExprDatabase(wxExprErrorHandler handler) |
| 859 | { |
| 860 | position = NULL; |
| 861 | hash_table = NULL; |
| 862 | currentwxExprErrorHandler = handler; |
| 863 | noErrors = 0; |
| 864 | } |
| 865 | |
| 866 | wxExprDatabase::wxExprDatabase(wxExprType type, const wxString& attribute, int size, |
| 867 | wxExprErrorHandler handler) |
| 868 | { |
| 869 | position = NULL; |
| 870 | attribute_to_hash = attribute; |
| 871 | if (type == wxExprString) |
| 872 | hash_table = new wxHashTable(wxKEY_STRING, size); |
| 873 | else if (type == wxExprInteger) |
| 874 | hash_table = new wxHashTable(wxKEY_INTEGER, size); |
| 875 | else hash_table = NULL; |
| 876 | |
| 877 | currentwxExprErrorHandler = handler; |
| 878 | noErrors = 0; |
| 879 | } |
| 880 | |
| 881 | wxExprDatabase::~wxExprDatabase(void) |
| 882 | { |
| 883 | ClearDatabase(); |
| 884 | if (hash_table) |
| 885 | delete hash_table; |
| 886 | } |
| 887 | |
| 888 | void wxExprDatabase::BeginFind(void) // Initialise a search |
| 889 | { |
| 890 | position = First(); |
| 891 | } |
| 892 | |
| 893 | wxExpr *wxExprDatabase::FindClause(long id) // Find a term based on an integer id attribute |
| 894 | // e.g. node(id=23, type=rectangle, ....). |
| 895 | { |
| 896 | wxExpr *found = NULL; |
| 897 | while (position && !found) |
| 898 | { |
| 899 | wxExpr *term = (wxExpr *)position->Data(); |
| 900 | |
| 901 | if (term->Type() == wxExprList) |
| 902 | { |
| 903 | wxExpr *value = term->AttributeValue("id"); |
| 904 | if (value->Type() == wxExprInteger && value->IntegerValue() == id) |
| 905 | found = term; |
| 906 | } |
| 907 | position = position->Next(); |
| 908 | } |
| 909 | return found; |
| 910 | } |
| 911 | |
| 912 | // Find on basis of attribute/value pairs, e.g. type=rectangle |
| 913 | wxExpr *wxExprDatabase::FindClause(const wxString& word, const wxString& val) |
| 914 | { |
| 915 | wxExpr *found = NULL; |
| 916 | while (position && !found) |
| 917 | { |
| 918 | wxExpr *term = (wxExpr *)position->Data(); |
| 919 | |
| 920 | if (term->Type() == wxExprList) |
| 921 | { |
| 922 | wxExpr *value = term->AttributeValue(word); |
| 923 | if ((value->Type() == wxExprWord && value->WordValue() == val) || |
| 924 | (value->Type() == wxExprString && value->StringValue() == val)) |
| 925 | found = term; |
| 926 | } |
| 927 | position = position->Next(); |
| 928 | } |
| 929 | return found; |
| 930 | } |
| 931 | |
| 932 | wxExpr *wxExprDatabase::FindClause(const wxString& word, long val) |
| 933 | { |
| 934 | wxExpr *found = NULL; |
| 935 | while (position && !found) |
| 936 | { |
| 937 | wxExpr *term = (wxExpr *)position->Data(); |
| 938 | |
| 939 | if (term->Type() == wxExprList) |
| 940 | { |
| 941 | wxExpr *value = term->AttributeValue(word); |
| 942 | if ((value->Type() == wxExprInteger) && (value->IntegerValue() == val)) |
| 943 | found = term; |
| 944 | } |
| 945 | position = position->Next(); |
| 946 | } |
| 947 | return found; |
| 948 | } |
| 949 | |
| 950 | wxExpr *wxExprDatabase::FindClause(const wxString& word, double val) |
| 951 | { |
| 952 | wxExpr *found = NULL; |
| 953 | while (position && !found) |
| 954 | { |
| 955 | wxExpr *term = (wxExpr *)position->Data(); |
| 956 | |
| 957 | if (term->Type() == wxExprList) |
| 958 | { |
| 959 | wxExpr *value = term->AttributeValue(word); |
| 960 | if ((value->Type() == wxExprReal) && (value->RealValue() == val)) |
| 961 | found = term; |
| 962 | } |
| 963 | position = position->Next(); |
| 964 | } |
| 965 | return found; |
| 966 | } |
| 967 | |
| 968 | wxExpr *wxExprDatabase::FindClauseByFunctor(const wxString& functor) |
| 969 | { |
| 970 | wxExpr *found = NULL; |
| 971 | while (position && !found) |
| 972 | { |
| 973 | wxExpr *term = (wxExpr *)position->Data(); |
| 974 | |
| 975 | if (term->Type() == wxExprList) |
| 976 | { |
| 977 | if (term->Functor() == functor) |
| 978 | found = term; |
| 979 | } |
| 980 | position = position->Next(); |
| 981 | } |
| 982 | return found; |
| 983 | } |
| 984 | |
| 985 | // If hashing is on, must store in hash table too |
| 986 | void wxExprDatabase::Append(wxExpr *clause) |
| 987 | { |
| 988 | wxList::Append((wxObject *)clause); |
| 989 | if (hash_table) |
| 990 | { |
| 991 | wxString functor(clause->Functor()); |
| 992 | wxExpr *expr = clause->AttributeValue(attribute_to_hash); |
| 993 | if (expr) |
| 994 | { |
| 995 | long functor_key = hash_table->MakeKey((char *)(const char *)functor); |
| 996 | long value_key = 0; |
| 997 | if (expr && expr->Type() == wxExprString) |
| 998 | { |
| 999 | value_key = hash_table->MakeKey((char *)(const char *)expr->StringValue()); |
| 1000 | hash_table->Put(functor_key + value_key, (char *)(const char *)expr->StringValue(), (wxObject *)clause); |
| 1001 | } |
| 1002 | else if (expr && expr->Type() == wxExprInteger) |
| 1003 | { |
| 1004 | value_key = expr->IntegerValue(); |
| 1005 | hash_table->Put(functor_key + value_key, expr->IntegerValue(), (wxObject *)clause); |
| 1006 | } |
| 1007 | |
| 1008 | } |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | wxExpr *wxExprDatabase::HashFind(const wxString& functor, long value) const |
| 1013 | { |
| 1014 | long key = hash_table->MakeKey((char *)(const char *)functor) + value; |
| 1015 | |
| 1016 | // The key alone isn't guaranteed to be unique: |
| 1017 | // must supply value too. Let's assume the value of the |
| 1018 | // id is going to be reasonably unique. |
| 1019 | return (wxExpr *)hash_table->Get(key, value); |
| 1020 | } |
| 1021 | |
| 1022 | wxExpr *wxExprDatabase::HashFind(const wxString& functor, const wxString& value) const |
| 1023 | { |
| 1024 | long key = hash_table->MakeKey((char *)(const char *)functor) + hash_table->MakeKey((char *)(const char *)value); |
| 1025 | return (wxExpr *)hash_table->Get(key, (char *)(const char *)value); |
| 1026 | } |
| 1027 | |
| 1028 | void wxExprDatabase::ClearDatabase(void) |
| 1029 | { |
| 1030 | noErrors = 0; |
| 1031 | wxNode *node = First(); |
| 1032 | while (node) |
| 1033 | { |
| 1034 | wxExpr *expr = (wxExpr *)node->Data(); |
| 1035 | delete expr; |
| 1036 | delete node; |
| 1037 | node = First(); |
| 1038 | } |
| 1039 | |
| 1040 | if (hash_table) |
| 1041 | hash_table->Clear(); |
| 1042 | } |
| 1043 | |
| 1044 | bool wxExprDatabase::Read(const wxString& filename) |
| 1045 | { |
| 1046 | noErrors = 0; |
| 1047 | |
| 1048 | FILE *f = fopen((const char *)filename, "r"); |
| 1049 | if (f) |
| 1050 | { |
| 1051 | thewxExprDatabase = this; |
| 1052 | |
| 1053 | LexFromFile(f); |
| 1054 | yyparse(); |
| 1055 | fclose(f); |
| 1056 | |
| 1057 | wxExprCleanUp(); |
| 1058 | return (noErrors == 0); |
| 1059 | } |
| 1060 | else |
| 1061 | { |
| 1062 | return FALSE; |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | bool wxExprDatabase::ReadFromString(const wxString& buffer) |
| 1067 | { |
| 1068 | noErrors = 0; |
| 1069 | thewxExprDatabase = this; |
| 1070 | |
| 1071 | LexFromString((char *)(const char *)buffer); |
| 1072 | yyparse(); |
| 1073 | wxExprCleanUp(); |
| 1074 | return (noErrors == 0); |
| 1075 | } |
| 1076 | |
| 1077 | bool wxExprDatabase::Write(const wxString& fileName) |
| 1078 | { |
| 1079 | ofstream str((char *)(const char *)fileName); |
| 1080 | if (str.bad()) |
| 1081 | return FALSE; |
| 1082 | return Write(str); |
| 1083 | } |
| 1084 | |
| 1085 | bool wxExprDatabase::Write(ostream& stream) |
| 1086 | { |
| 1087 | noErrors = 0; |
| 1088 | wxNode *node = First(); |
| 1089 | while (node) |
| 1090 | { |
| 1091 | wxExpr *expr = (wxExpr *)node->Data(); |
| 1092 | expr->WriteClause(stream); |
| 1093 | node = node->Next(); |
| 1094 | } |
| 1095 | return (noErrors == 0); |
| 1096 | } |
| 1097 | |
| 1098 | void wxExprDatabase::WriteLisp(ostream& stream) |
| 1099 | { |
| 1100 | noErrors = 0; |
| 1101 | wxNode *node = First(); |
| 1102 | while (node) |
| 1103 | { |
| 1104 | wxExpr *expr = (wxExpr *)node->Data(); |
| 1105 | expr->WriteLispExpr(stream); |
| 1106 | stream << "\n\n"; |
| 1107 | node = node->Next(); |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | void add_expr(wxExpr * expr) |
| 1112 | { |
| 1113 | thewxExprDatabase->Append(expr); |
| 1114 | } |
| 1115 | |
| 1116 | // Checks functor |
| 1117 | bool wxExprIsFunctor(wxExpr *expr, const wxString& functor) |
| 1118 | { |
| 1119 | if (expr && (expr->Type() == wxExprList)) |
| 1120 | { |
| 1121 | wxExpr *first_expr = expr->value.first; |
| 1122 | |
| 1123 | if (first_expr && (first_expr->Type() == wxExprWord) && |
| 1124 | (first_expr->WordValue() == functor)) |
| 1125 | return TRUE; |
| 1126 | else |
| 1127 | return FALSE; |
| 1128 | } |
| 1129 | else |
| 1130 | return FALSE; |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Called from parser |
| 1135 | * |
| 1136 | */ |
| 1137 | |
| 1138 | char *wxmake_integer(char *str) |
| 1139 | { |
| 1140 | wxExpr *x = new wxExpr(atol(str)); |
| 1141 | |
| 1142 | return (char *)x; |
| 1143 | } |
| 1144 | |
| 1145 | char *wxmake_real(char *str1, char *str2) |
| 1146 | { |
| 1147 | char buf[50]; |
| 1148 | |
| 1149 | sprintf(buf, "%s.%s", str1, str2); |
| 1150 | double f = (double)atof(buf); |
| 1151 | wxExpr *x = new wxExpr(f); |
| 1152 | |
| 1153 | return (char *)x; |
| 1154 | } |
| 1155 | |
| 1156 | // extern "C" double exp10(double); |
| 1157 | |
| 1158 | char *wxmake_exp(char *str1, char *str2) |
| 1159 | { |
| 1160 | double mantissa = (double)atoi(str1); |
| 1161 | double exponent = (double)atoi(str2); |
| 1162 | |
| 1163 | double d = mantissa * pow(10.0, exponent); |
| 1164 | |
| 1165 | wxExpr *x = new wxExpr(d); |
| 1166 | |
| 1167 | return (char *)x; |
| 1168 | } |
| 1169 | |
| 1170 | char *wxmake_exp2(char *str1, char *str2, char *str3) |
| 1171 | { |
| 1172 | char buf[50]; |
| 1173 | |
| 1174 | sprintf(buf, "%s.%s", str1, str2); |
| 1175 | double mantissa = (double)atof(buf); |
| 1176 | double exponent = (double)atoi(str3); |
| 1177 | |
| 1178 | double d = mantissa * pow(10.0, exponent); |
| 1179 | |
| 1180 | wxExpr *x = new wxExpr(d); |
| 1181 | |
| 1182 | return (char *)x; |
| 1183 | } |
| 1184 | |
| 1185 | char *wxmake_word(char *str) |
| 1186 | { |
| 1187 | wxExpr *x = new wxExpr(wxExprWord, str); |
| 1188 | return (char *)x; |
| 1189 | } |
| 1190 | |
| 1191 | char *wxmake_string(char *str) |
| 1192 | { |
| 1193 | char *s, *t; |
| 1194 | int len, i; |
| 1195 | |
| 1196 | str++; /* skip leading quote */ |
| 1197 | len = strlen(str) - 1; /* ignore trailing quote */ |
| 1198 | |
| 1199 | s = new char[len + 1]; |
| 1200 | |
| 1201 | t = s; |
| 1202 | for(i=0; i<len; i++) |
| 1203 | { |
| 1204 | if (str[i] == '\\' && str[i+1] == '"') |
| 1205 | { |
| 1206 | *t++ = '"'; |
| 1207 | i ++; |
| 1208 | } |
| 1209 | else if (str[i] == '\\' && str[i+1] == '\\') |
| 1210 | { |
| 1211 | *t++ = '\\'; |
| 1212 | i ++; |
| 1213 | } |
| 1214 | else |
| 1215 | *t++ = str[i]; |
| 1216 | } |
| 1217 | |
| 1218 | *t = '\0'; |
| 1219 | |
| 1220 | wxExpr *x = new wxExpr(wxExprString, s, FALSE); |
| 1221 | return (char *)x; |
| 1222 | } |
| 1223 | |
| 1224 | char *proio_cons(char * ccar, char * ccdr) |
| 1225 | { |
| 1226 | wxExpr *car = (wxExpr *)ccar; |
| 1227 | wxExpr *cdr = (wxExpr *)ccdr; |
| 1228 | |
| 1229 | if (cdr == NULL) |
| 1230 | { |
| 1231 | cdr = new wxExpr(wxExprList); |
| 1232 | } |
| 1233 | if (car) |
| 1234 | cdr->Insert(car); |
| 1235 | return (char *)cdr; |
| 1236 | } |
| 1237 | |
| 1238 | void process_command(char * cexpr) |
| 1239 | { |
| 1240 | wxExpr *expr = (wxExpr *)cexpr; |
| 1241 | add_expr(expr); |
| 1242 | } |
| 1243 | |
| 1244 | void syntax_error(char *WXUNUSED(s)) |
| 1245 | { |
| 1246 | if (currentwxExprErrorHandler) |
| 1247 | (void)(*(currentwxExprErrorHandler))(WXEXPR_ERROR_SYNTAX, "syntax error"); |
| 1248 | if (thewxExprDatabase) thewxExprDatabase->noErrors += 1; |
| 1249 | } |
| 1250 | |
| 1251 | #if 0 |
| 1252 | #ifdef _WINDLL |
| 1253 | // char *__cdecl strdup(const char *s) |
| 1254 | WXDLLEXPORT char *strdup(const char *s) |
| 1255 | { |
| 1256 | int len = strlen(s); |
| 1257 | char *new_s = (char *)malloc(sizeof(char)*(len+1)); |
| 1258 | strcpy(new_s, s); |
| 1259 | return new_s; |
| 1260 | } |
| 1261 | #endif |
| 1262 | #endif |
| 1263 | |