1 /* vi:set ts=8 sts=4 sw=4 noet: 2 * 3 * VIM - Vi IMproved by Bram Moolenaar 4 * 5 * Do ":help uganda" in Vim to read copying and usage conditions. 6 * Do ":help credits" in Vim to see a list of people who contributed. 7 * See README.txt for an overview of the Vim source code. 8 */ 9 10 /* 11 * eval.c: Expression evaluation. 12 */ 13 #define USING_FLOAT_STUFF 14 15 #include "vim.h" 16 17 #if defined(FEAT_EVAL) || defined(PROTO) 18 19 #ifdef VMS 20 # include <float.h> 21 #endif 22 23 static char *e_missbrac = N_("E111: Missing ']'"); 24 static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary"); 25 #ifdef FEAT_FLOAT 26 static char *e_float_as_string = N_("E806: using Float as a String"); 27 #endif 28 static char *e_nowhitespace = N_("E274: No white space allowed before parenthesis"); 29 30 #define NAMESPACE_CHAR (char_u *)"abglstvw" 31 32 /* 33 * When recursively copying lists and dicts we need to remember which ones we 34 * have done to avoid endless recursiveness. This unique ID is used for that. 35 * The last bit is used for previous_funccal, ignored when comparing. 36 */ 37 static int current_copyID = 0; 38 39 static int echo_attr = 0; // attributes used for ":echo" 40 41 /* 42 * Info used by a ":for" loop. 43 */ 44 typedef struct 45 { 46 int fi_semicolon; // TRUE if ending in '; var]' 47 int fi_varcount; // nr of variables in the list 48 listwatch_T fi_lw; // keep an eye on the item used. 49 list_T *fi_list; // list being used 50 int fi_bi; // index of blob 51 blob_T *fi_blob; // blob being used 52 } forinfo_T; 53 54 static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op); 55 static int eval2(char_u **arg, typval_T *rettv, int evaluate); 56 static int eval3(char_u **arg, typval_T *rettv, int evaluate); 57 static int eval4(char_u **arg, typval_T *rettv, int evaluate); 58 static int eval5(char_u **arg, typval_T *rettv, int evaluate); 59 static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string); 60 static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string); 61 static int eval7_leader(typval_T *rettv, char_u *start_leader, char_u **end_leaderp); 62 63 static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate); 64 static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate); 65 static int free_unref_items(int copyID); 66 static int get_env_tv(char_u **arg, typval_T *rettv, int evaluate); 67 static char_u *make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end); 68 static int tv_check_lock(typval_T *tv, char_u *name, int use_gettext); 69 70 /* 71 * Return "n1" divided by "n2", taking care of dividing by zero. 72 */ 73 varnumber_T 74 num_divide(varnumber_T n1, varnumber_T n2) 75 { 76 varnumber_T result; 77 78 if (n2 == 0) // give an error message? 79 { 80 if (n1 == 0) 81 result = VARNUM_MIN; // similar to NaN 82 else if (n1 < 0) 83 result = -VARNUM_MAX; 84 else 85 result = VARNUM_MAX; 86 } 87 else 88 result = n1 / n2; 89 90 return result; 91 } 92 93 /* 94 * Return "n1" modulus "n2", taking care of dividing by zero. 95 */ 96 varnumber_T 97 num_modulus(varnumber_T n1, varnumber_T n2) 98 { 99 // Give an error when n2 is 0? 100 return (n2 == 0) ? 0 : (n1 % n2); 101 } 102 103 #if defined(EBCDIC) || defined(PROTO) 104 /* 105 * Compare struct fst by function name. 106 */ 107 static int 108 compare_func_name(const void *s1, const void *s2) 109 { 110 struct fst *p1 = (struct fst *)s1; 111 struct fst *p2 = (struct fst *)s2; 112 113 return STRCMP(p1->f_name, p2->f_name); 114 } 115 116 /* 117 * Sort the function table by function name. 118 * The sorting of the table above is ASCII dependent. 119 * On machines using EBCDIC we have to sort it. 120 */ 121 static void 122 sortFunctions(void) 123 { 124 int funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1; 125 126 qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name); 127 } 128 #endif 129 130 /* 131 * Initialize the global and v: variables. 132 */ 133 void 134 eval_init(void) 135 { 136 evalvars_init(); 137 func_init(); 138 139 #ifdef EBCDIC 140 /* 141 * Sort the function table, to enable binary search. 142 */ 143 sortFunctions(); 144 #endif 145 } 146 147 #if defined(EXITFREE) || defined(PROTO) 148 void 149 eval_clear(void) 150 { 151 evalvars_clear(); 152 153 free_scriptnames(); 154 free_locales(); 155 156 // autoloaded script names 157 free_autoload_scriptnames(); 158 159 // unreferenced lists and dicts 160 (void)garbage_collect(FALSE); 161 162 // functions not garbage collected 163 free_all_functions(); 164 } 165 #endif 166 167 /* 168 * Top level evaluation function, returning a boolean. 169 * Sets "error" to TRUE if there was an error. 170 * Return TRUE or FALSE. 171 */ 172 int 173 eval_to_bool( 174 char_u *arg, 175 int *error, 176 char_u **nextcmd, 177 int skip) // only parse, don't execute 178 { 179 typval_T tv; 180 varnumber_T retval = FALSE; 181 182 if (skip) 183 ++emsg_skip; 184 if (eval0(arg, &tv, nextcmd, !skip) == FAIL) 185 *error = TRUE; 186 else 187 { 188 *error = FALSE; 189 if (!skip) 190 { 191 retval = (tv_get_number_chk(&tv, error) != 0); 192 clear_tv(&tv); 193 } 194 } 195 if (skip) 196 --emsg_skip; 197 198 return (int)retval; 199 } 200 201 /* 202 * Call eval1() and give an error message if not done at a lower level. 203 */ 204 static int 205 eval1_emsg(char_u **arg, typval_T *rettv, int evaluate) 206 { 207 char_u *start = *arg; 208 int ret; 209 int did_emsg_before = did_emsg; 210 int called_emsg_before = called_emsg; 211 212 ret = eval1(arg, rettv, evaluate); 213 if (ret == FAIL) 214 { 215 // Report the invalid expression unless the expression evaluation has 216 // been cancelled due to an aborting error, an interrupt, or an 217 // exception, or we already gave a more specific error. 218 // Also check called_emsg for when using assert_fails(). 219 if (!aborting() && did_emsg == did_emsg_before 220 && called_emsg == called_emsg_before) 221 semsg(_(e_invexpr2), start); 222 } 223 return ret; 224 } 225 226 int 227 eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv) 228 { 229 char_u *s; 230 char_u buf[NUMBUFLEN]; 231 funcexe_T funcexe; 232 233 if (expr->v_type == VAR_FUNC) 234 { 235 s = expr->vval.v_string; 236 if (s == NULL || *s == NUL) 237 return FAIL; 238 vim_memset(&funcexe, 0, sizeof(funcexe)); 239 funcexe.evaluate = TRUE; 240 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 241 return FAIL; 242 } 243 else if (expr->v_type == VAR_PARTIAL) 244 { 245 partial_T *partial = expr->vval.v_partial; 246 247 s = partial_name(partial); 248 if (s == NULL || *s == NUL) 249 return FAIL; 250 vim_memset(&funcexe, 0, sizeof(funcexe)); 251 funcexe.evaluate = TRUE; 252 funcexe.partial = partial; 253 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 254 return FAIL; 255 } 256 else 257 { 258 s = tv_get_string_buf_chk(expr, buf); 259 if (s == NULL) 260 return FAIL; 261 s = skipwhite(s); 262 if (eval1_emsg(&s, rettv, TRUE) == FAIL) 263 return FAIL; 264 if (*s != NUL) // check for trailing chars after expr 265 { 266 clear_tv(rettv); 267 semsg(_(e_invexpr2), s); 268 return FAIL; 269 } 270 } 271 return OK; 272 } 273 274 /* 275 * Like eval_to_bool() but using a typval_T instead of a string. 276 * Works for string, funcref and partial. 277 */ 278 int 279 eval_expr_to_bool(typval_T *expr, int *error) 280 { 281 typval_T rettv; 282 int res; 283 284 if (eval_expr_typval(expr, NULL, 0, &rettv) == FAIL) 285 { 286 *error = TRUE; 287 return FALSE; 288 } 289 res = (tv_get_number_chk(&rettv, error) != 0); 290 clear_tv(&rettv); 291 return res; 292 } 293 294 /* 295 * Top level evaluation function, returning a string. If "skip" is TRUE, 296 * only parsing to "nextcmd" is done, without reporting errors. Return 297 * pointer to allocated memory, or NULL for failure or when "skip" is TRUE. 298 */ 299 char_u * 300 eval_to_string_skip( 301 char_u *arg, 302 char_u **nextcmd, 303 int skip) // only parse, don't execute 304 { 305 typval_T tv; 306 char_u *retval; 307 308 if (skip) 309 ++emsg_skip; 310 if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip) 311 retval = NULL; 312 else 313 { 314 retval = vim_strsave(tv_get_string(&tv)); 315 clear_tv(&tv); 316 } 317 if (skip) 318 --emsg_skip; 319 320 return retval; 321 } 322 323 /* 324 * Skip over an expression at "*pp". 325 * Return FAIL for an error, OK otherwise. 326 */ 327 int 328 skip_expr(char_u **pp) 329 { 330 typval_T rettv; 331 332 *pp = skipwhite(*pp); 333 return eval1(pp, &rettv, FALSE); 334 } 335 336 /* 337 * Top level evaluation function, returning a string. 338 * When "convert" is TRUE convert a List into a sequence of lines and convert 339 * a Float to a String. 340 * Return pointer to allocated memory, or NULL for failure. 341 */ 342 char_u * 343 eval_to_string( 344 char_u *arg, 345 char_u **nextcmd, 346 int convert) 347 { 348 typval_T tv; 349 char_u *retval; 350 garray_T ga; 351 #ifdef FEAT_FLOAT 352 char_u numbuf[NUMBUFLEN]; 353 #endif 354 355 if (eval0(arg, &tv, nextcmd, TRUE) == FAIL) 356 retval = NULL; 357 else 358 { 359 if (convert && tv.v_type == VAR_LIST) 360 { 361 ga_init2(&ga, (int)sizeof(char), 80); 362 if (tv.vval.v_list != NULL) 363 { 364 list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, FALSE, 0); 365 if (tv.vval.v_list->lv_len > 0) 366 ga_append(&ga, NL); 367 } 368 ga_append(&ga, NUL); 369 retval = (char_u *)ga.ga_data; 370 } 371 #ifdef FEAT_FLOAT 372 else if (convert && tv.v_type == VAR_FLOAT) 373 { 374 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float); 375 retval = vim_strsave(numbuf); 376 } 377 #endif 378 else 379 retval = vim_strsave(tv_get_string(&tv)); 380 clear_tv(&tv); 381 } 382 383 return retval; 384 } 385 386 /* 387 * Call eval_to_string() without using current local variables and using 388 * textlock. When "use_sandbox" is TRUE use the sandbox. 389 */ 390 char_u * 391 eval_to_string_safe( 392 char_u *arg, 393 char_u **nextcmd, 394 int use_sandbox) 395 { 396 char_u *retval; 397 funccal_entry_T funccal_entry; 398 399 save_funccal(&funccal_entry); 400 if (use_sandbox) 401 ++sandbox; 402 ++textlock; 403 retval = eval_to_string(arg, nextcmd, FALSE); 404 if (use_sandbox) 405 --sandbox; 406 --textlock; 407 restore_funccal(); 408 return retval; 409 } 410 411 /* 412 * Top level evaluation function, returning a number. 413 * Evaluates "expr" silently. 414 * Returns -1 for an error. 415 */ 416 varnumber_T 417 eval_to_number(char_u *expr) 418 { 419 typval_T rettv; 420 varnumber_T retval; 421 char_u *p = skipwhite(expr); 422 423 ++emsg_off; 424 425 if (eval1(&p, &rettv, TRUE) == FAIL) 426 retval = -1; 427 else 428 { 429 retval = tv_get_number_chk(&rettv, NULL); 430 clear_tv(&rettv); 431 } 432 --emsg_off; 433 434 return retval; 435 } 436 437 /* 438 * Top level evaluation function. 439 * Returns an allocated typval_T with the result. 440 * Returns NULL when there is an error. 441 */ 442 typval_T * 443 eval_expr(char_u *arg, char_u **nextcmd) 444 { 445 typval_T *tv; 446 447 tv = ALLOC_ONE(typval_T); 448 if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL) 449 VIM_CLEAR(tv); 450 451 return tv; 452 } 453 454 /* 455 * Call some Vim script function and return the result in "*rettv". 456 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] 457 * should have type VAR_UNKNOWN. 458 * Returns OK or FAIL. 459 */ 460 int 461 call_vim_function( 462 char_u *func, 463 int argc, 464 typval_T *argv, 465 typval_T *rettv) 466 { 467 int ret; 468 funcexe_T funcexe; 469 470 rettv->v_type = VAR_UNKNOWN; // clear_tv() uses this 471 vim_memset(&funcexe, 0, sizeof(funcexe)); 472 funcexe.firstline = curwin->w_cursor.lnum; 473 funcexe.lastline = curwin->w_cursor.lnum; 474 funcexe.evaluate = TRUE; 475 ret = call_func(func, -1, rettv, argc, argv, &funcexe); 476 if (ret == FAIL) 477 clear_tv(rettv); 478 479 return ret; 480 } 481 482 /* 483 * Call Vim script function "func" and return the result as a number. 484 * Returns -1 when calling the function fails. 485 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 486 * have type VAR_UNKNOWN. 487 */ 488 varnumber_T 489 call_func_retnr( 490 char_u *func, 491 int argc, 492 typval_T *argv) 493 { 494 typval_T rettv; 495 varnumber_T retval; 496 497 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 498 return -1; 499 500 retval = tv_get_number_chk(&rettv, NULL); 501 clear_tv(&rettv); 502 return retval; 503 } 504 505 /* 506 * Call Vim script function "func" and return the result as a string. 507 * Returns NULL when calling the function fails. 508 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 509 * have type VAR_UNKNOWN. 510 */ 511 void * 512 call_func_retstr( 513 char_u *func, 514 int argc, 515 typval_T *argv) 516 { 517 typval_T rettv; 518 char_u *retval; 519 520 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 521 return NULL; 522 523 retval = vim_strsave(tv_get_string(&rettv)); 524 clear_tv(&rettv); 525 return retval; 526 } 527 528 /* 529 * Call Vim script function "func" and return the result as a List. 530 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 531 * have type VAR_UNKNOWN. 532 * Returns NULL when there is something wrong. 533 */ 534 void * 535 call_func_retlist( 536 char_u *func, 537 int argc, 538 typval_T *argv) 539 { 540 typval_T rettv; 541 542 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 543 return NULL; 544 545 if (rettv.v_type != VAR_LIST) 546 { 547 clear_tv(&rettv); 548 return NULL; 549 } 550 551 return rettv.vval.v_list; 552 } 553 554 #ifdef FEAT_FOLDING 555 /* 556 * Evaluate 'foldexpr'. Returns the foldlevel, and any character preceding 557 * it in "*cp". Doesn't give error messages. 558 */ 559 int 560 eval_foldexpr(char_u *arg, int *cp) 561 { 562 typval_T tv; 563 varnumber_T retval; 564 char_u *s; 565 int use_sandbox = was_set_insecurely((char_u *)"foldexpr", 566 OPT_LOCAL); 567 568 ++emsg_off; 569 if (use_sandbox) 570 ++sandbox; 571 ++textlock; 572 *cp = NUL; 573 if (eval0(arg, &tv, NULL, TRUE) == FAIL) 574 retval = 0; 575 else 576 { 577 // If the result is a number, just return the number. 578 if (tv.v_type == VAR_NUMBER) 579 retval = tv.vval.v_number; 580 else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL) 581 retval = 0; 582 else 583 { 584 // If the result is a string, check if there is a non-digit before 585 // the number. 586 s = tv.vval.v_string; 587 if (!VIM_ISDIGIT(*s) && *s != '-') 588 *cp = *s++; 589 retval = atol((char *)s); 590 } 591 clear_tv(&tv); 592 } 593 --emsg_off; 594 if (use_sandbox) 595 --sandbox; 596 --textlock; 597 598 return (int)retval; 599 } 600 #endif 601 602 /* 603 * Get an lval: variable, Dict item or List item that can be assigned a value 604 * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]", 605 * "name.key", "name.key[expr]" etc. 606 * Indexing only works if "name" is an existing List or Dictionary. 607 * "name" points to the start of the name. 608 * If "rettv" is not NULL it points to the value to be assigned. 609 * "unlet" is TRUE for ":unlet": slightly different behavior when something is 610 * wrong; must end in space or cmd separator. 611 * 612 * flags: 613 * GLV_QUIET: do not give error messages 614 * GLV_READ_ONLY: will not change the variable 615 * GLV_NO_AUTOLOAD: do not use script autoloading 616 * 617 * Returns a pointer to just after the name, including indexes. 618 * When an evaluation error occurs "lp->ll_name" is NULL; 619 * Returns NULL for a parsing error. Still need to free items in "lp"! 620 */ 621 char_u * 622 get_lval( 623 char_u *name, 624 typval_T *rettv, 625 lval_T *lp, 626 int unlet, 627 int skip, 628 int flags, // GLV_ values 629 int fne_flags) // flags for find_name_end() 630 { 631 char_u *p; 632 char_u *expr_start, *expr_end; 633 int cc; 634 dictitem_T *v; 635 typval_T var1; 636 typval_T var2; 637 int empty1 = FALSE; 638 listitem_T *ni; 639 char_u *key = NULL; 640 int len; 641 hashtab_T *ht; 642 int quiet = flags & GLV_QUIET; 643 644 // Clear everything in "lp". 645 vim_memset(lp, 0, sizeof(lval_T)); 646 647 if (skip) 648 { 649 // When skipping just find the end of the name. 650 lp->ll_name = name; 651 return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags); 652 } 653 654 // Find the end of the name. 655 p = find_name_end(name, &expr_start, &expr_end, fne_flags); 656 if (expr_start != NULL) 657 { 658 // Don't expand the name when we already know there is an error. 659 if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p) 660 && *p != '[' && *p != '.') 661 { 662 emsg(_(e_trailing)); 663 return NULL; 664 } 665 666 lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p); 667 if (lp->ll_exp_name == NULL) 668 { 669 // Report an invalid expression in braces, unless the 670 // expression evaluation has been cancelled due to an 671 // aborting error, an interrupt, or an exception. 672 if (!aborting() && !quiet) 673 { 674 emsg_severe = TRUE; 675 semsg(_(e_invarg2), name); 676 return NULL; 677 } 678 } 679 lp->ll_name = lp->ll_exp_name; 680 } 681 else 682 lp->ll_name = name; 683 684 // Without [idx] or .key we are done. 685 if ((*p != '[' && *p != '.') || lp->ll_name == NULL) 686 return p; 687 688 cc = *p; 689 *p = NUL; 690 // Only pass &ht when we would write to the variable, it prevents autoload 691 // as well. 692 v = find_var(lp->ll_name, (flags & GLV_READ_ONLY) ? NULL : &ht, 693 flags & GLV_NO_AUTOLOAD); 694 if (v == NULL && !quiet) 695 semsg(_(e_undefvar), lp->ll_name); 696 *p = cc; 697 if (v == NULL) 698 return NULL; 699 700 /* 701 * Loop until no more [idx] or .key is following. 702 */ 703 lp->ll_tv = &v->di_tv; 704 var1.v_type = VAR_UNKNOWN; 705 var2.v_type = VAR_UNKNOWN; 706 while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT)) 707 { 708 if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL) 709 && !(lp->ll_tv->v_type == VAR_DICT 710 && lp->ll_tv->vval.v_dict != NULL) 711 && !(lp->ll_tv->v_type == VAR_BLOB 712 && lp->ll_tv->vval.v_blob != NULL)) 713 { 714 if (!quiet) 715 emsg(_("E689: Can only index a List, Dictionary or Blob")); 716 return NULL; 717 } 718 if (lp->ll_range) 719 { 720 if (!quiet) 721 emsg(_("E708: [:] must come last")); 722 return NULL; 723 } 724 725 len = -1; 726 if (*p == '.') 727 { 728 key = p + 1; 729 for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len) 730 ; 731 if (len == 0) 732 { 733 if (!quiet) 734 emsg(_(e_emptykey)); 735 return NULL; 736 } 737 p = key + len; 738 } 739 else 740 { 741 // Get the index [expr] or the first index [expr: ]. 742 p = skipwhite(p + 1); 743 if (*p == ':') 744 empty1 = TRUE; 745 else 746 { 747 empty1 = FALSE; 748 if (eval1(&p, &var1, TRUE) == FAIL) // recursive! 749 return NULL; 750 if (tv_get_string_chk(&var1) == NULL) 751 { 752 // not a number or string 753 clear_tv(&var1); 754 return NULL; 755 } 756 } 757 758 // Optionally get the second index [ :expr]. 759 if (*p == ':') 760 { 761 if (lp->ll_tv->v_type == VAR_DICT) 762 { 763 if (!quiet) 764 emsg(_(e_dictrange)); 765 clear_tv(&var1); 766 return NULL; 767 } 768 if (rettv != NULL 769 && !(rettv->v_type == VAR_LIST 770 && rettv->vval.v_list != NULL) 771 && !(rettv->v_type == VAR_BLOB 772 && rettv->vval.v_blob != NULL)) 773 { 774 if (!quiet) 775 emsg(_("E709: [:] requires a List or Blob value")); 776 clear_tv(&var1); 777 return NULL; 778 } 779 p = skipwhite(p + 1); 780 if (*p == ']') 781 lp->ll_empty2 = TRUE; 782 else 783 { 784 lp->ll_empty2 = FALSE; 785 if (eval1(&p, &var2, TRUE) == FAIL) // recursive! 786 { 787 clear_tv(&var1); 788 return NULL; 789 } 790 if (tv_get_string_chk(&var2) == NULL) 791 { 792 // not a number or string 793 clear_tv(&var1); 794 clear_tv(&var2); 795 return NULL; 796 } 797 } 798 lp->ll_range = TRUE; 799 } 800 else 801 lp->ll_range = FALSE; 802 803 if (*p != ']') 804 { 805 if (!quiet) 806 emsg(_(e_missbrac)); 807 clear_tv(&var1); 808 clear_tv(&var2); 809 return NULL; 810 } 811 812 // Skip to past ']'. 813 ++p; 814 } 815 816 if (lp->ll_tv->v_type == VAR_DICT) 817 { 818 if (len == -1) 819 { 820 // "[key]": get key from "var1" 821 key = tv_get_string_chk(&var1); // is number or string 822 if (key == NULL) 823 { 824 clear_tv(&var1); 825 return NULL; 826 } 827 } 828 lp->ll_list = NULL; 829 lp->ll_dict = lp->ll_tv->vval.v_dict; 830 lp->ll_di = dict_find(lp->ll_dict, key, len); 831 832 // When assigning to a scope dictionary check that a function and 833 // variable name is valid (only variable name unless it is l: or 834 // g: dictionary). Disallow overwriting a builtin function. 835 if (rettv != NULL && lp->ll_dict->dv_scope != 0) 836 { 837 int prevval; 838 int wrong; 839 840 if (len != -1) 841 { 842 prevval = key[len]; 843 key[len] = NUL; 844 } 845 else 846 prevval = 0; // avoid compiler warning 847 wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE 848 && rettv->v_type == VAR_FUNC 849 && var_check_func_name(key, lp->ll_di == NULL)) 850 || !valid_varname(key); 851 if (len != -1) 852 key[len] = prevval; 853 if (wrong) 854 return NULL; 855 } 856 857 if (lp->ll_di == NULL) 858 { 859 // Can't add "v:" or "a:" variable. 860 if (lp->ll_dict == get_vimvar_dict() 861 || &lp->ll_dict->dv_hashtab == get_funccal_args_ht()) 862 { 863 semsg(_(e_illvar), name); 864 clear_tv(&var1); 865 return NULL; 866 } 867 868 // Key does not exist in dict: may need to add it. 869 if (*p == '[' || *p == '.' || unlet) 870 { 871 if (!quiet) 872 semsg(_(e_dictkey), key); 873 clear_tv(&var1); 874 return NULL; 875 } 876 if (len == -1) 877 lp->ll_newkey = vim_strsave(key); 878 else 879 lp->ll_newkey = vim_strnsave(key, len); 880 clear_tv(&var1); 881 if (lp->ll_newkey == NULL) 882 p = NULL; 883 break; 884 } 885 // existing variable, need to check if it can be changed 886 else if ((flags & GLV_READ_ONLY) == 0 887 && var_check_ro(lp->ll_di->di_flags, name, FALSE)) 888 { 889 clear_tv(&var1); 890 return NULL; 891 } 892 893 clear_tv(&var1); 894 lp->ll_tv = &lp->ll_di->di_tv; 895 } 896 else if (lp->ll_tv->v_type == VAR_BLOB) 897 { 898 long bloblen = blob_len(lp->ll_tv->vval.v_blob); 899 900 /* 901 * Get the number and item for the only or first index of the List. 902 */ 903 if (empty1) 904 lp->ll_n1 = 0; 905 else 906 // is number or string 907 lp->ll_n1 = (long)tv_get_number(&var1); 908 clear_tv(&var1); 909 910 if (lp->ll_n1 < 0 911 || lp->ll_n1 > bloblen 912 || (lp->ll_range && lp->ll_n1 == bloblen)) 913 { 914 if (!quiet) 915 semsg(_(e_blobidx), lp->ll_n1); 916 clear_tv(&var2); 917 return NULL; 918 } 919 if (lp->ll_range && !lp->ll_empty2) 920 { 921 lp->ll_n2 = (long)tv_get_number(&var2); 922 clear_tv(&var2); 923 if (lp->ll_n2 < 0 924 || lp->ll_n2 >= bloblen 925 || lp->ll_n2 < lp->ll_n1) 926 { 927 if (!quiet) 928 semsg(_(e_blobidx), lp->ll_n2); 929 return NULL; 930 } 931 } 932 lp->ll_blob = lp->ll_tv->vval.v_blob; 933 lp->ll_tv = NULL; 934 break; 935 } 936 else 937 { 938 /* 939 * Get the number and item for the only or first index of the List. 940 */ 941 if (empty1) 942 lp->ll_n1 = 0; 943 else 944 // is number or string 945 lp->ll_n1 = (long)tv_get_number(&var1); 946 clear_tv(&var1); 947 948 lp->ll_dict = NULL; 949 lp->ll_list = lp->ll_tv->vval.v_list; 950 lp->ll_li = list_find(lp->ll_list, lp->ll_n1); 951 if (lp->ll_li == NULL) 952 { 953 if (lp->ll_n1 < 0) 954 { 955 lp->ll_n1 = 0; 956 lp->ll_li = list_find(lp->ll_list, lp->ll_n1); 957 } 958 } 959 if (lp->ll_li == NULL) 960 { 961 clear_tv(&var2); 962 if (!quiet) 963 semsg(_(e_listidx), lp->ll_n1); 964 return NULL; 965 } 966 967 /* 968 * May need to find the item or absolute index for the second 969 * index of a range. 970 * When no index given: "lp->ll_empty2" is TRUE. 971 * Otherwise "lp->ll_n2" is set to the second index. 972 */ 973 if (lp->ll_range && !lp->ll_empty2) 974 { 975 lp->ll_n2 = (long)tv_get_number(&var2); 976 // is number or string 977 clear_tv(&var2); 978 if (lp->ll_n2 < 0) 979 { 980 ni = list_find(lp->ll_list, lp->ll_n2); 981 if (ni == NULL) 982 { 983 if (!quiet) 984 semsg(_(e_listidx), lp->ll_n2); 985 return NULL; 986 } 987 lp->ll_n2 = list_idx_of_item(lp->ll_list, ni); 988 } 989 990 // Check that lp->ll_n2 isn't before lp->ll_n1. 991 if (lp->ll_n1 < 0) 992 lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li); 993 if (lp->ll_n2 < lp->ll_n1) 994 { 995 if (!quiet) 996 semsg(_(e_listidx), lp->ll_n2); 997 return NULL; 998 } 999 } 1000 1001 lp->ll_tv = &lp->ll_li->li_tv; 1002 } 1003 } 1004 1005 clear_tv(&var1); 1006 return p; 1007 } 1008 1009 /* 1010 * Clear lval "lp" that was filled by get_lval(). 1011 */ 1012 void 1013 clear_lval(lval_T *lp) 1014 { 1015 vim_free(lp->ll_exp_name); 1016 vim_free(lp->ll_newkey); 1017 } 1018 1019 /* 1020 * Set a variable that was parsed by get_lval() to "rettv". 1021 * "endp" points to just after the parsed name. 1022 * "op" is NULL, "+" for "+=", "-" for "-=", "*" for "*=", "/" for "/=", 1023 * "%" for "%=", "." for ".=" or "=" for "=". 1024 */ 1025 void 1026 set_var_lval( 1027 lval_T *lp, 1028 char_u *endp, 1029 typval_T *rettv, 1030 int copy, 1031 int is_const, // Disallow to modify existing variable for :const 1032 char_u *op) 1033 { 1034 int cc; 1035 listitem_T *ri; 1036 dictitem_T *di; 1037 1038 if (lp->ll_tv == NULL) 1039 { 1040 cc = *endp; 1041 *endp = NUL; 1042 if (lp->ll_blob != NULL) 1043 { 1044 int error = FALSE, val; 1045 1046 if (op != NULL && *op != '=') 1047 { 1048 semsg(_(e_letwrong), op); 1049 return; 1050 } 1051 1052 if (lp->ll_range && rettv->v_type == VAR_BLOB) 1053 { 1054 int il, ir; 1055 1056 if (lp->ll_empty2) 1057 lp->ll_n2 = blob_len(lp->ll_blob) - 1; 1058 1059 if (lp->ll_n2 - lp->ll_n1 + 1 != blob_len(rettv->vval.v_blob)) 1060 { 1061 emsg(_("E972: Blob value does not have the right number of bytes")); 1062 return; 1063 } 1064 if (lp->ll_empty2) 1065 lp->ll_n2 = blob_len(lp->ll_blob); 1066 1067 ir = 0; 1068 for (il = lp->ll_n1; il <= lp->ll_n2; il++) 1069 blob_set(lp->ll_blob, il, 1070 blob_get(rettv->vval.v_blob, ir++)); 1071 } 1072 else 1073 { 1074 val = (int)tv_get_number_chk(rettv, &error); 1075 if (!error) 1076 { 1077 garray_T *gap = &lp->ll_blob->bv_ga; 1078 1079 // Allow for appending a byte. Setting a byte beyond 1080 // the end is an error otherwise. 1081 if (lp->ll_n1 < gap->ga_len 1082 || (lp->ll_n1 == gap->ga_len 1083 && ga_grow(&lp->ll_blob->bv_ga, 1) == OK)) 1084 { 1085 blob_set(lp->ll_blob, lp->ll_n1, val); 1086 if (lp->ll_n1 == gap->ga_len) 1087 ++gap->ga_len; 1088 } 1089 // error for invalid range was already given in get_lval() 1090 } 1091 } 1092 } 1093 else if (op != NULL && *op != '=') 1094 { 1095 typval_T tv; 1096 1097 if (is_const) 1098 { 1099 emsg(_(e_cannot_mod)); 1100 *endp = cc; 1101 return; 1102 } 1103 1104 // handle +=, -=, *=, /=, %= and .= 1105 di = NULL; 1106 if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name), 1107 &tv, &di, TRUE, FALSE) == OK) 1108 { 1109 if ((di == NULL 1110 || (!var_check_ro(di->di_flags, lp->ll_name, FALSE) 1111 && !tv_check_lock(&di->di_tv, lp->ll_name, FALSE))) 1112 && tv_op(&tv, rettv, op) == OK) 1113 set_var(lp->ll_name, &tv, FALSE); 1114 clear_tv(&tv); 1115 } 1116 } 1117 else 1118 set_var_const(lp->ll_name, rettv, copy, is_const); 1119 *endp = cc; 1120 } 1121 else if (var_check_lock(lp->ll_newkey == NULL 1122 ? lp->ll_tv->v_lock 1123 : lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE)) 1124 ; 1125 else if (lp->ll_range) 1126 { 1127 listitem_T *ll_li = lp->ll_li; 1128 int ll_n1 = lp->ll_n1; 1129 1130 if (is_const) 1131 { 1132 emsg(_("E996: Cannot lock a range")); 1133 return; 1134 } 1135 1136 /* 1137 * Check whether any of the list items is locked 1138 */ 1139 for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; ) 1140 { 1141 if (var_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE)) 1142 return; 1143 ri = ri->li_next; 1144 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1)) 1145 break; 1146 ll_li = ll_li->li_next; 1147 ++ll_n1; 1148 } 1149 1150 /* 1151 * Assign the List values to the list items. 1152 */ 1153 for (ri = rettv->vval.v_list->lv_first; ri != NULL; ) 1154 { 1155 if (op != NULL && *op != '=') 1156 tv_op(&lp->ll_li->li_tv, &ri->li_tv, op); 1157 else 1158 { 1159 clear_tv(&lp->ll_li->li_tv); 1160 copy_tv(&ri->li_tv, &lp->ll_li->li_tv); 1161 } 1162 ri = ri->li_next; 1163 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1)) 1164 break; 1165 if (lp->ll_li->li_next == NULL) 1166 { 1167 // Need to add an empty item. 1168 if (list_append_number(lp->ll_list, 0) == FAIL) 1169 { 1170 ri = NULL; 1171 break; 1172 } 1173 } 1174 lp->ll_li = lp->ll_li->li_next; 1175 ++lp->ll_n1; 1176 } 1177 if (ri != NULL) 1178 emsg(_("E710: List value has more items than target")); 1179 else if (lp->ll_empty2 1180 ? (lp->ll_li != NULL && lp->ll_li->li_next != NULL) 1181 : lp->ll_n1 != lp->ll_n2) 1182 emsg(_("E711: List value has not enough items")); 1183 } 1184 else 1185 { 1186 /* 1187 * Assign to a List or Dictionary item. 1188 */ 1189 if (is_const) 1190 { 1191 emsg(_("E996: Cannot lock a list or dict")); 1192 return; 1193 } 1194 if (lp->ll_newkey != NULL) 1195 { 1196 if (op != NULL && *op != '=') 1197 { 1198 semsg(_(e_letwrong), op); 1199 return; 1200 } 1201 1202 // Need to add an item to the Dictionary. 1203 di = dictitem_alloc(lp->ll_newkey); 1204 if (di == NULL) 1205 return; 1206 if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL) 1207 { 1208 vim_free(di); 1209 return; 1210 } 1211 lp->ll_tv = &di->di_tv; 1212 } 1213 else if (op != NULL && *op != '=') 1214 { 1215 tv_op(lp->ll_tv, rettv, op); 1216 return; 1217 } 1218 else 1219 clear_tv(lp->ll_tv); 1220 1221 /* 1222 * Assign the value to the variable or list item. 1223 */ 1224 if (copy) 1225 copy_tv(rettv, lp->ll_tv); 1226 else 1227 { 1228 *lp->ll_tv = *rettv; 1229 lp->ll_tv->v_lock = 0; 1230 init_tv(rettv); 1231 } 1232 } 1233 } 1234 1235 /* 1236 * Handle "tv1 += tv2", "tv1 -= tv2", "tv1 *= tv2", "tv1 /= tv2", "tv1 %= tv2" 1237 * and "tv1 .= tv2" 1238 * Returns OK or FAIL. 1239 */ 1240 static int 1241 tv_op(typval_T *tv1, typval_T *tv2, char_u *op) 1242 { 1243 varnumber_T n; 1244 char_u numbuf[NUMBUFLEN]; 1245 char_u *s; 1246 1247 // Can't do anything with a Funcref, Dict, v:true on the right. 1248 if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT 1249 && tv2->v_type != VAR_SPECIAL) 1250 { 1251 switch (tv1->v_type) 1252 { 1253 case VAR_UNKNOWN: 1254 case VAR_DICT: 1255 case VAR_FUNC: 1256 case VAR_PARTIAL: 1257 case VAR_SPECIAL: 1258 case VAR_JOB: 1259 case VAR_CHANNEL: 1260 break; 1261 1262 case VAR_BLOB: 1263 if (*op != '+' || tv2->v_type != VAR_BLOB) 1264 break; 1265 // BLOB += BLOB 1266 if (tv1->vval.v_blob != NULL && tv2->vval.v_blob != NULL) 1267 { 1268 blob_T *b1 = tv1->vval.v_blob; 1269 blob_T *b2 = tv2->vval.v_blob; 1270 int i, len = blob_len(b2); 1271 for (i = 0; i < len; i++) 1272 ga_append(&b1->bv_ga, blob_get(b2, i)); 1273 } 1274 return OK; 1275 1276 case VAR_LIST: 1277 if (*op != '+' || tv2->v_type != VAR_LIST) 1278 break; 1279 // List += List 1280 if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL) 1281 list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL); 1282 return OK; 1283 1284 case VAR_NUMBER: 1285 case VAR_STRING: 1286 if (tv2->v_type == VAR_LIST) 1287 break; 1288 if (vim_strchr((char_u *)"+-*/%", *op) != NULL) 1289 { 1290 // nr += nr , nr -= nr , nr *=nr , nr /= nr , nr %= nr 1291 n = tv_get_number(tv1); 1292 #ifdef FEAT_FLOAT 1293 if (tv2->v_type == VAR_FLOAT) 1294 { 1295 float_T f = n; 1296 1297 if (*op == '%') 1298 break; 1299 switch (*op) 1300 { 1301 case '+': f += tv2->vval.v_float; break; 1302 case '-': f -= tv2->vval.v_float; break; 1303 case '*': f *= tv2->vval.v_float; break; 1304 case '/': f /= tv2->vval.v_float; break; 1305 } 1306 clear_tv(tv1); 1307 tv1->v_type = VAR_FLOAT; 1308 tv1->vval.v_float = f; 1309 } 1310 else 1311 #endif 1312 { 1313 switch (*op) 1314 { 1315 case '+': n += tv_get_number(tv2); break; 1316 case '-': n -= tv_get_number(tv2); break; 1317 case '*': n *= tv_get_number(tv2); break; 1318 case '/': n = num_divide(n, tv_get_number(tv2)); break; 1319 case '%': n = num_modulus(n, tv_get_number(tv2)); break; 1320 } 1321 clear_tv(tv1); 1322 tv1->v_type = VAR_NUMBER; 1323 tv1->vval.v_number = n; 1324 } 1325 } 1326 else 1327 { 1328 if (tv2->v_type == VAR_FLOAT) 1329 break; 1330 1331 // str .= str 1332 s = tv_get_string(tv1); 1333 s = concat_str(s, tv_get_string_buf(tv2, numbuf)); 1334 clear_tv(tv1); 1335 tv1->v_type = VAR_STRING; 1336 tv1->vval.v_string = s; 1337 } 1338 return OK; 1339 1340 case VAR_FLOAT: 1341 #ifdef FEAT_FLOAT 1342 { 1343 float_T f; 1344 1345 if (*op == '%' || *op == '.' 1346 || (tv2->v_type != VAR_FLOAT 1347 && tv2->v_type != VAR_NUMBER 1348 && tv2->v_type != VAR_STRING)) 1349 break; 1350 if (tv2->v_type == VAR_FLOAT) 1351 f = tv2->vval.v_float; 1352 else 1353 f = tv_get_number(tv2); 1354 switch (*op) 1355 { 1356 case '+': tv1->vval.v_float += f; break; 1357 case '-': tv1->vval.v_float -= f; break; 1358 case '*': tv1->vval.v_float *= f; break; 1359 case '/': tv1->vval.v_float /= f; break; 1360 } 1361 } 1362 #endif 1363 return OK; 1364 } 1365 } 1366 1367 semsg(_(e_letwrong), op); 1368 return FAIL; 1369 } 1370 1371 /* 1372 * Evaluate the expression used in a ":for var in expr" command. 1373 * "arg" points to "var". 1374 * Set "*errp" to TRUE for an error, FALSE otherwise; 1375 * Return a pointer that holds the info. Null when there is an error. 1376 */ 1377 void * 1378 eval_for_line( 1379 char_u *arg, 1380 int *errp, 1381 char_u **nextcmdp, 1382 int skip) 1383 { 1384 forinfo_T *fi; 1385 char_u *expr; 1386 typval_T tv; 1387 list_T *l; 1388 1389 *errp = TRUE; // default: there is an error 1390 1391 fi = ALLOC_CLEAR_ONE(forinfo_T); 1392 if (fi == NULL) 1393 return NULL; 1394 1395 expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon); 1396 if (expr == NULL) 1397 return fi; 1398 1399 expr = skipwhite(expr); 1400 if (expr[0] != 'i' || expr[1] != 'n' || !VIM_ISWHITE(expr[2])) 1401 { 1402 emsg(_("E690: Missing \"in\" after :for")); 1403 return fi; 1404 } 1405 1406 if (skip) 1407 ++emsg_skip; 1408 if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK) 1409 { 1410 *errp = FALSE; 1411 if (!skip) 1412 { 1413 if (tv.v_type == VAR_LIST) 1414 { 1415 l = tv.vval.v_list; 1416 if (l == NULL) 1417 { 1418 // a null list is like an empty list: do nothing 1419 clear_tv(&tv); 1420 } 1421 else 1422 { 1423 // No need to increment the refcount, it's already set for 1424 // the list being used in "tv". 1425 fi->fi_list = l; 1426 list_add_watch(l, &fi->fi_lw); 1427 fi->fi_lw.lw_item = l->lv_first; 1428 } 1429 } 1430 else if (tv.v_type == VAR_BLOB) 1431 { 1432 fi->fi_bi = 0; 1433 if (tv.vval.v_blob != NULL) 1434 { 1435 typval_T btv; 1436 1437 // Make a copy, so that the iteration still works when the 1438 // blob is changed. 1439 blob_copy(&tv, &btv); 1440 fi->fi_blob = btv.vval.v_blob; 1441 } 1442 clear_tv(&tv); 1443 } 1444 else 1445 { 1446 emsg(_(e_listreq)); 1447 clear_tv(&tv); 1448 } 1449 } 1450 } 1451 if (skip) 1452 --emsg_skip; 1453 1454 return fi; 1455 } 1456 1457 /* 1458 * Use the first item in a ":for" list. Advance to the next. 1459 * Assign the values to the variable (list). "arg" points to the first one. 1460 * Return TRUE when a valid item was found, FALSE when at end of list or 1461 * something wrong. 1462 */ 1463 int 1464 next_for_item(void *fi_void, char_u *arg) 1465 { 1466 forinfo_T *fi = (forinfo_T *)fi_void; 1467 int result; 1468 listitem_T *item; 1469 1470 if (fi->fi_blob != NULL) 1471 { 1472 typval_T tv; 1473 1474 if (fi->fi_bi >= blob_len(fi->fi_blob)) 1475 return FALSE; 1476 tv.v_type = VAR_NUMBER; 1477 tv.v_lock = VAR_FIXED; 1478 tv.vval.v_number = blob_get(fi->fi_blob, fi->fi_bi); 1479 ++fi->fi_bi; 1480 return ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon, 1481 fi->fi_varcount, FALSE, NULL) == OK; 1482 } 1483 1484 item = fi->fi_lw.lw_item; 1485 if (item == NULL) 1486 result = FALSE; 1487 else 1488 { 1489 fi->fi_lw.lw_item = item->li_next; 1490 result = (ex_let_vars(arg, &item->li_tv, TRUE, fi->fi_semicolon, 1491 fi->fi_varcount, FALSE, NULL) == OK); 1492 } 1493 return result; 1494 } 1495 1496 /* 1497 * Free the structure used to store info used by ":for". 1498 */ 1499 void 1500 free_for_info(void *fi_void) 1501 { 1502 forinfo_T *fi = (forinfo_T *)fi_void; 1503 1504 if (fi != NULL && fi->fi_list != NULL) 1505 { 1506 list_rem_watch(fi->fi_list, &fi->fi_lw); 1507 list_unref(fi->fi_list); 1508 } 1509 if (fi != NULL && fi->fi_blob != NULL) 1510 blob_unref(fi->fi_blob); 1511 vim_free(fi); 1512 } 1513 1514 void 1515 set_context_for_expression( 1516 expand_T *xp, 1517 char_u *arg, 1518 cmdidx_T cmdidx) 1519 { 1520 int got_eq = FALSE; 1521 int c; 1522 char_u *p; 1523 1524 if (cmdidx == CMD_let || cmdidx == CMD_const) 1525 { 1526 xp->xp_context = EXPAND_USER_VARS; 1527 if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL) 1528 { 1529 // ":let var1 var2 ...": find last space. 1530 for (p = arg + STRLEN(arg); p >= arg; ) 1531 { 1532 xp->xp_pattern = p; 1533 MB_PTR_BACK(arg, p); 1534 if (VIM_ISWHITE(*p)) 1535 break; 1536 } 1537 return; 1538 } 1539 } 1540 else 1541 xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS 1542 : EXPAND_EXPRESSION; 1543 while ((xp->xp_pattern = vim_strpbrk(arg, 1544 (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL) 1545 { 1546 c = *xp->xp_pattern; 1547 if (c == '&') 1548 { 1549 c = xp->xp_pattern[1]; 1550 if (c == '&') 1551 { 1552 ++xp->xp_pattern; 1553 xp->xp_context = cmdidx != CMD_let || got_eq 1554 ? EXPAND_EXPRESSION : EXPAND_NOTHING; 1555 } 1556 else if (c != ' ') 1557 { 1558 xp->xp_context = EXPAND_SETTINGS; 1559 if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':') 1560 xp->xp_pattern += 2; 1561 1562 } 1563 } 1564 else if (c == '$') 1565 { 1566 // environment variable 1567 xp->xp_context = EXPAND_ENV_VARS; 1568 } 1569 else if (c == '=') 1570 { 1571 got_eq = TRUE; 1572 xp->xp_context = EXPAND_EXPRESSION; 1573 } 1574 else if (c == '#' 1575 && xp->xp_context == EXPAND_EXPRESSION) 1576 { 1577 // Autoload function/variable contains '#'. 1578 break; 1579 } 1580 else if ((c == '<' || c == '#') 1581 && xp->xp_context == EXPAND_FUNCTIONS 1582 && vim_strchr(xp->xp_pattern, '(') == NULL) 1583 { 1584 // Function name can start with "<SNR>" and contain '#'. 1585 break; 1586 } 1587 else if (cmdidx != CMD_let || got_eq) 1588 { 1589 if (c == '"') // string 1590 { 1591 while ((c = *++xp->xp_pattern) != NUL && c != '"') 1592 if (c == '\\' && xp->xp_pattern[1] != NUL) 1593 ++xp->xp_pattern; 1594 xp->xp_context = EXPAND_NOTHING; 1595 } 1596 else if (c == '\'') // literal string 1597 { 1598 // Trick: '' is like stopping and starting a literal string. 1599 while ((c = *++xp->xp_pattern) != NUL && c != '\'') 1600 /* skip */ ; 1601 xp->xp_context = EXPAND_NOTHING; 1602 } 1603 else if (c == '|') 1604 { 1605 if (xp->xp_pattern[1] == '|') 1606 { 1607 ++xp->xp_pattern; 1608 xp->xp_context = EXPAND_EXPRESSION; 1609 } 1610 else 1611 xp->xp_context = EXPAND_COMMANDS; 1612 } 1613 else 1614 xp->xp_context = EXPAND_EXPRESSION; 1615 } 1616 else 1617 // Doesn't look like something valid, expand as an expression 1618 // anyway. 1619 xp->xp_context = EXPAND_EXPRESSION; 1620 arg = xp->xp_pattern; 1621 if (*arg != NUL) 1622 while ((c = *++arg) != NUL && (c == ' ' || c == '\t')) 1623 /* skip */ ; 1624 } 1625 xp->xp_pattern = arg; 1626 } 1627 1628 /* 1629 * Return TRUE if "pat" matches "text". 1630 * Does not use 'cpo' and always uses 'magic'. 1631 */ 1632 int 1633 pattern_match(char_u *pat, char_u *text, int ic) 1634 { 1635 int matches = FALSE; 1636 char_u *save_cpo; 1637 regmatch_T regmatch; 1638 1639 // avoid 'l' flag in 'cpoptions' 1640 save_cpo = p_cpo; 1641 p_cpo = (char_u *)""; 1642 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 1643 if (regmatch.regprog != NULL) 1644 { 1645 regmatch.rm_ic = ic; 1646 matches = vim_regexec_nl(®match, text, (colnr_T)0); 1647 vim_regfree(regmatch.regprog); 1648 } 1649 p_cpo = save_cpo; 1650 return matches; 1651 } 1652 1653 /* 1654 * Handle a name followed by "(". Both for just "name(arg)" and for 1655 * "expr->name(arg)". 1656 * Returns OK or FAIL. 1657 */ 1658 static int 1659 eval_func( 1660 char_u **arg, // points to "(", will be advanced 1661 char_u *name, 1662 int name_len, 1663 typval_T *rettv, 1664 int evaluate, 1665 typval_T *basetv) // "expr" for "expr->name(arg)" 1666 { 1667 char_u *s = name; 1668 int len = name_len; 1669 partial_T *partial; 1670 int ret = OK; 1671 1672 if (!evaluate) 1673 check_vars(s, len); 1674 1675 // If "s" is the name of a variable of type VAR_FUNC 1676 // use its contents. 1677 s = deref_func_name(s, &len, &partial, !evaluate); 1678 1679 // Need to make a copy, in case evaluating the arguments makes 1680 // the name invalid. 1681 s = vim_strsave(s); 1682 if (s == NULL) 1683 ret = FAIL; 1684 else 1685 { 1686 funcexe_T funcexe; 1687 1688 // Invoke the function. 1689 vim_memset(&funcexe, 0, sizeof(funcexe)); 1690 funcexe.firstline = curwin->w_cursor.lnum; 1691 funcexe.lastline = curwin->w_cursor.lnum; 1692 funcexe.evaluate = evaluate; 1693 funcexe.partial = partial; 1694 funcexe.basetv = basetv; 1695 ret = get_func_tv(s, len, rettv, arg, &funcexe); 1696 } 1697 vim_free(s); 1698 1699 // If evaluate is FALSE rettv->v_type was not set in 1700 // get_func_tv, but it's needed in handle_subscript() to parse 1701 // what follows. So set it here. 1702 if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(') 1703 { 1704 rettv->vval.v_string = NULL; 1705 rettv->v_type = VAR_FUNC; 1706 } 1707 1708 // Stop the expression evaluation when immediately 1709 // aborting on error, or when an interrupt occurred or 1710 // an exception was thrown but not caught. 1711 if (evaluate && aborting()) 1712 { 1713 if (ret == OK) 1714 clear_tv(rettv); 1715 ret = FAIL; 1716 } 1717 return ret; 1718 } 1719 1720 /* 1721 * The "evaluate" argument: When FALSE, the argument is only parsed but not 1722 * executed. The function may return OK, but the rettv will be of type 1723 * VAR_UNKNOWN. The function still returns FAIL for a syntax error. 1724 */ 1725 1726 /* 1727 * Handle zero level expression. 1728 * This calls eval1() and handles error message and nextcmd. 1729 * Put the result in "rettv" when returning OK and "evaluate" is TRUE. 1730 * Note: "rettv.v_lock" is not set. 1731 * Return OK or FAIL. 1732 */ 1733 int 1734 eval0( 1735 char_u *arg, 1736 typval_T *rettv, 1737 char_u **nextcmd, 1738 int evaluate) 1739 { 1740 int ret; 1741 char_u *p; 1742 int did_emsg_before = did_emsg; 1743 int called_emsg_before = called_emsg; 1744 1745 p = skipwhite(arg); 1746 ret = eval1(&p, rettv, evaluate); 1747 if (ret == FAIL || !ends_excmd(*p)) 1748 { 1749 if (ret != FAIL) 1750 clear_tv(rettv); 1751 /* 1752 * Report the invalid expression unless the expression evaluation has 1753 * been cancelled due to an aborting error, an interrupt, or an 1754 * exception, or we already gave a more specific error. 1755 * Also check called_emsg for when using assert_fails(). 1756 */ 1757 if (!aborting() && did_emsg == did_emsg_before 1758 && called_emsg == called_emsg_before) 1759 semsg(_(e_invexpr2), arg); 1760 ret = FAIL; 1761 } 1762 if (nextcmd != NULL) 1763 *nextcmd = check_nextcmd(p); 1764 1765 return ret; 1766 } 1767 1768 /* 1769 * Handle top level expression: 1770 * expr2 ? expr1 : expr1 1771 * 1772 * "arg" must point to the first non-white of the expression. 1773 * "arg" is advanced to the next non-white after the recognized expression. 1774 * 1775 * Note: "rettv.v_lock" is not set. 1776 * 1777 * Return OK or FAIL. 1778 */ 1779 int 1780 eval1(char_u **arg, typval_T *rettv, int evaluate) 1781 { 1782 int result; 1783 typval_T var2; 1784 1785 /* 1786 * Get the first variable. 1787 */ 1788 if (eval2(arg, rettv, evaluate) == FAIL) 1789 return FAIL; 1790 1791 if ((*arg)[0] == '?') 1792 { 1793 result = FALSE; 1794 if (evaluate) 1795 { 1796 int error = FALSE; 1797 1798 if (tv_get_number_chk(rettv, &error) != 0) 1799 result = TRUE; 1800 clear_tv(rettv); 1801 if (error) 1802 return FAIL; 1803 } 1804 1805 /* 1806 * Get the second variable. 1807 */ 1808 *arg = skipwhite(*arg + 1); 1809 if (eval1(arg, rettv, evaluate && result) == FAIL) // recursive! 1810 return FAIL; 1811 1812 /* 1813 * Check for the ":". 1814 */ 1815 if ((*arg)[0] != ':') 1816 { 1817 emsg(_("E109: Missing ':' after '?'")); 1818 if (evaluate && result) 1819 clear_tv(rettv); 1820 return FAIL; 1821 } 1822 1823 /* 1824 * Get the third variable. 1825 */ 1826 *arg = skipwhite(*arg + 1); 1827 if (eval1(arg, &var2, evaluate && !result) == FAIL) // recursive! 1828 { 1829 if (evaluate && result) 1830 clear_tv(rettv); 1831 return FAIL; 1832 } 1833 if (evaluate && !result) 1834 *rettv = var2; 1835 } 1836 1837 return OK; 1838 } 1839 1840 /* 1841 * Handle first level expression: 1842 * expr2 || expr2 || expr2 logical OR 1843 * 1844 * "arg" must point to the first non-white of the expression. 1845 * "arg" is advanced to the next non-white after the recognized expression. 1846 * 1847 * Return OK or FAIL. 1848 */ 1849 static int 1850 eval2(char_u **arg, typval_T *rettv, int evaluate) 1851 { 1852 typval_T var2; 1853 long result; 1854 int first; 1855 int error = FALSE; 1856 1857 /* 1858 * Get the first variable. 1859 */ 1860 if (eval3(arg, rettv, evaluate) == FAIL) 1861 return FAIL; 1862 1863 /* 1864 * Repeat until there is no following "||". 1865 */ 1866 first = TRUE; 1867 result = FALSE; 1868 while ((*arg)[0] == '|' && (*arg)[1] == '|') 1869 { 1870 if (evaluate && first) 1871 { 1872 if (tv_get_number_chk(rettv, &error) != 0) 1873 result = TRUE; 1874 clear_tv(rettv); 1875 if (error) 1876 return FAIL; 1877 first = FALSE; 1878 } 1879 1880 /* 1881 * Get the second variable. 1882 */ 1883 *arg = skipwhite(*arg + 2); 1884 if (eval3(arg, &var2, evaluate && !result) == FAIL) 1885 return FAIL; 1886 1887 /* 1888 * Compute the result. 1889 */ 1890 if (evaluate && !result) 1891 { 1892 if (tv_get_number_chk(&var2, &error) != 0) 1893 result = TRUE; 1894 clear_tv(&var2); 1895 if (error) 1896 return FAIL; 1897 } 1898 if (evaluate) 1899 { 1900 rettv->v_type = VAR_NUMBER; 1901 rettv->vval.v_number = result; 1902 } 1903 } 1904 1905 return OK; 1906 } 1907 1908 /* 1909 * Handle second level expression: 1910 * expr3 && expr3 && expr3 logical AND 1911 * 1912 * "arg" must point to the first non-white of the expression. 1913 * "arg" is advanced to the next non-white after the recognized expression. 1914 * 1915 * Return OK or FAIL. 1916 */ 1917 static int 1918 eval3(char_u **arg, typval_T *rettv, int evaluate) 1919 { 1920 typval_T var2; 1921 long result; 1922 int first; 1923 int error = FALSE; 1924 1925 /* 1926 * Get the first variable. 1927 */ 1928 if (eval4(arg, rettv, evaluate) == FAIL) 1929 return FAIL; 1930 1931 /* 1932 * Repeat until there is no following "&&". 1933 */ 1934 first = TRUE; 1935 result = TRUE; 1936 while ((*arg)[0] == '&' && (*arg)[1] == '&') 1937 { 1938 if (evaluate && first) 1939 { 1940 if (tv_get_number_chk(rettv, &error) == 0) 1941 result = FALSE; 1942 clear_tv(rettv); 1943 if (error) 1944 return FAIL; 1945 first = FALSE; 1946 } 1947 1948 /* 1949 * Get the second variable. 1950 */ 1951 *arg = skipwhite(*arg + 2); 1952 if (eval4(arg, &var2, evaluate && result) == FAIL) 1953 return FAIL; 1954 1955 /* 1956 * Compute the result. 1957 */ 1958 if (evaluate && result) 1959 { 1960 if (tv_get_number_chk(&var2, &error) == 0) 1961 result = FALSE; 1962 clear_tv(&var2); 1963 if (error) 1964 return FAIL; 1965 } 1966 if (evaluate) 1967 { 1968 rettv->v_type = VAR_NUMBER; 1969 rettv->vval.v_number = result; 1970 } 1971 } 1972 1973 return OK; 1974 } 1975 1976 /* 1977 * Handle third level expression: 1978 * var1 == var2 1979 * var1 =~ var2 1980 * var1 != var2 1981 * var1 !~ var2 1982 * var1 > var2 1983 * var1 >= var2 1984 * var1 < var2 1985 * var1 <= var2 1986 * var1 is var2 1987 * var1 isnot var2 1988 * 1989 * "arg" must point to the first non-white of the expression. 1990 * "arg" is advanced to the next non-white after the recognized expression. 1991 * 1992 * Return OK or FAIL. 1993 */ 1994 static int 1995 eval4(char_u **arg, typval_T *rettv, int evaluate) 1996 { 1997 typval_T var2; 1998 char_u *p; 1999 int i; 2000 exptype_T type = EXPR_UNKNOWN; 2001 int len = 2; 2002 int ic; 2003 2004 /* 2005 * Get the first variable. 2006 */ 2007 if (eval5(arg, rettv, evaluate) == FAIL) 2008 return FAIL; 2009 2010 p = *arg; 2011 switch (p[0]) 2012 { 2013 case '=': if (p[1] == '=') 2014 type = EXPR_EQUAL; 2015 else if (p[1] == '~') 2016 type = EXPR_MATCH; 2017 break; 2018 case '!': if (p[1] == '=') 2019 type = EXPR_NEQUAL; 2020 else if (p[1] == '~') 2021 type = EXPR_NOMATCH; 2022 break; 2023 case '>': if (p[1] != '=') 2024 { 2025 type = EXPR_GREATER; 2026 len = 1; 2027 } 2028 else 2029 type = EXPR_GEQUAL; 2030 break; 2031 case '<': if (p[1] != '=') 2032 { 2033 type = EXPR_SMALLER; 2034 len = 1; 2035 } 2036 else 2037 type = EXPR_SEQUAL; 2038 break; 2039 case 'i': if (p[1] == 's') 2040 { 2041 if (p[2] == 'n' && p[3] == 'o' && p[4] == 't') 2042 len = 5; 2043 i = p[len]; 2044 if (!isalnum(i) && i != '_') 2045 type = len == 2 ? EXPR_IS : EXPR_ISNOT; 2046 } 2047 break; 2048 } 2049 2050 /* 2051 * If there is a comparative operator, use it. 2052 */ 2053 if (type != EXPR_UNKNOWN) 2054 { 2055 // extra question mark appended: ignore case 2056 if (p[len] == '?') 2057 { 2058 ic = TRUE; 2059 ++len; 2060 } 2061 // extra '#' appended: match case 2062 else if (p[len] == '#') 2063 { 2064 ic = FALSE; 2065 ++len; 2066 } 2067 // nothing appended: use 'ignorecase' 2068 else 2069 ic = p_ic; 2070 2071 /* 2072 * Get the second variable. 2073 */ 2074 *arg = skipwhite(p + len); 2075 if (eval5(arg, &var2, evaluate) == FAIL) 2076 { 2077 clear_tv(rettv); 2078 return FAIL; 2079 } 2080 if (evaluate) 2081 { 2082 int ret = typval_compare(rettv, &var2, type, ic); 2083 2084 clear_tv(&var2); 2085 return ret; 2086 } 2087 } 2088 2089 return OK; 2090 } 2091 2092 /* 2093 * Handle fourth level expression: 2094 * + number addition 2095 * - number subtraction 2096 * . string concatenation (if script version is 1) 2097 * .. string concatenation 2098 * 2099 * "arg" must point to the first non-white of the expression. 2100 * "arg" is advanced to the next non-white after the recognized expression. 2101 * 2102 * Return OK or FAIL. 2103 */ 2104 static int 2105 eval5(char_u **arg, typval_T *rettv, int evaluate) 2106 { 2107 typval_T var2; 2108 typval_T var3; 2109 int op; 2110 varnumber_T n1, n2; 2111 #ifdef FEAT_FLOAT 2112 float_T f1 = 0, f2 = 0; 2113 #endif 2114 char_u *s1, *s2; 2115 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 2116 char_u *p; 2117 int concat; 2118 2119 /* 2120 * Get the first variable. 2121 */ 2122 if (eval6(arg, rettv, evaluate, FALSE) == FAIL) 2123 return FAIL; 2124 2125 /* 2126 * Repeat computing, until no '+', '-' or '.' is following. 2127 */ 2128 for (;;) 2129 { 2130 // "." is only string concatenation when scriptversion is 1 2131 op = **arg; 2132 concat = op == '.' 2133 && (*(*arg + 1) == '.' || current_sctx.sc_version < 2); 2134 if (op != '+' && op != '-' && !concat) 2135 break; 2136 2137 if ((op != '+' || (rettv->v_type != VAR_LIST 2138 && rettv->v_type != VAR_BLOB)) 2139 #ifdef FEAT_FLOAT 2140 && (op == '.' || rettv->v_type != VAR_FLOAT) 2141 #endif 2142 ) 2143 { 2144 // For "list + ...", an illegal use of the first operand as 2145 // a number cannot be determined before evaluating the 2nd 2146 // operand: if this is also a list, all is ok. 2147 // For "something . ...", "something - ..." or "non-list + ...", 2148 // we know that the first operand needs to be a string or number 2149 // without evaluating the 2nd operand. So check before to avoid 2150 // side effects after an error. 2151 if (evaluate && tv_get_string_chk(rettv) == NULL) 2152 { 2153 clear_tv(rettv); 2154 return FAIL; 2155 } 2156 } 2157 2158 /* 2159 * Get the second variable. 2160 */ 2161 if (op == '.' && *(*arg + 1) == '.') // .. string concatenation 2162 ++*arg; 2163 *arg = skipwhite(*arg + 1); 2164 if (eval6(arg, &var2, evaluate, op == '.') == FAIL) 2165 { 2166 clear_tv(rettv); 2167 return FAIL; 2168 } 2169 2170 if (evaluate) 2171 { 2172 /* 2173 * Compute the result. 2174 */ 2175 if (op == '.') 2176 { 2177 s1 = tv_get_string_buf(rettv, buf1); // already checked 2178 s2 = tv_get_string_buf_chk(&var2, buf2); 2179 if (s2 == NULL) // type error ? 2180 { 2181 clear_tv(rettv); 2182 clear_tv(&var2); 2183 return FAIL; 2184 } 2185 p = concat_str(s1, s2); 2186 clear_tv(rettv); 2187 rettv->v_type = VAR_STRING; 2188 rettv->vval.v_string = p; 2189 } 2190 else if (op == '+' && rettv->v_type == VAR_BLOB 2191 && var2.v_type == VAR_BLOB) 2192 { 2193 blob_T *b1 = rettv->vval.v_blob; 2194 blob_T *b2 = var2.vval.v_blob; 2195 blob_T *b = blob_alloc(); 2196 int i; 2197 2198 if (b != NULL) 2199 { 2200 for (i = 0; i < blob_len(b1); i++) 2201 ga_append(&b->bv_ga, blob_get(b1, i)); 2202 for (i = 0; i < blob_len(b2); i++) 2203 ga_append(&b->bv_ga, blob_get(b2, i)); 2204 2205 clear_tv(rettv); 2206 rettv_blob_set(rettv, b); 2207 } 2208 } 2209 else if (op == '+' && rettv->v_type == VAR_LIST 2210 && var2.v_type == VAR_LIST) 2211 { 2212 // concatenate Lists 2213 if (list_concat(rettv->vval.v_list, var2.vval.v_list, 2214 &var3) == FAIL) 2215 { 2216 clear_tv(rettv); 2217 clear_tv(&var2); 2218 return FAIL; 2219 } 2220 clear_tv(rettv); 2221 *rettv = var3; 2222 } 2223 else 2224 { 2225 int error = FALSE; 2226 2227 #ifdef FEAT_FLOAT 2228 if (rettv->v_type == VAR_FLOAT) 2229 { 2230 f1 = rettv->vval.v_float; 2231 n1 = 0; 2232 } 2233 else 2234 #endif 2235 { 2236 n1 = tv_get_number_chk(rettv, &error); 2237 if (error) 2238 { 2239 // This can only happen for "list + non-list". For 2240 // "non-list + ..." or "something - ...", we returned 2241 // before evaluating the 2nd operand. 2242 clear_tv(rettv); 2243 return FAIL; 2244 } 2245 #ifdef FEAT_FLOAT 2246 if (var2.v_type == VAR_FLOAT) 2247 f1 = n1; 2248 #endif 2249 } 2250 #ifdef FEAT_FLOAT 2251 if (var2.v_type == VAR_FLOAT) 2252 { 2253 f2 = var2.vval.v_float; 2254 n2 = 0; 2255 } 2256 else 2257 #endif 2258 { 2259 n2 = tv_get_number_chk(&var2, &error); 2260 if (error) 2261 { 2262 clear_tv(rettv); 2263 clear_tv(&var2); 2264 return FAIL; 2265 } 2266 #ifdef FEAT_FLOAT 2267 if (rettv->v_type == VAR_FLOAT) 2268 f2 = n2; 2269 #endif 2270 } 2271 clear_tv(rettv); 2272 2273 #ifdef FEAT_FLOAT 2274 // If there is a float on either side the result is a float. 2275 if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT) 2276 { 2277 if (op == '+') 2278 f1 = f1 + f2; 2279 else 2280 f1 = f1 - f2; 2281 rettv->v_type = VAR_FLOAT; 2282 rettv->vval.v_float = f1; 2283 } 2284 else 2285 #endif 2286 { 2287 if (op == '+') 2288 n1 = n1 + n2; 2289 else 2290 n1 = n1 - n2; 2291 rettv->v_type = VAR_NUMBER; 2292 rettv->vval.v_number = n1; 2293 } 2294 } 2295 clear_tv(&var2); 2296 } 2297 } 2298 return OK; 2299 } 2300 2301 /* 2302 * Handle fifth level expression: 2303 * * number multiplication 2304 * / number division 2305 * % number modulo 2306 * 2307 * "arg" must point to the first non-white of the expression. 2308 * "arg" is advanced to the next non-white after the recognized expression. 2309 * 2310 * Return OK or FAIL. 2311 */ 2312 static int 2313 eval6( 2314 char_u **arg, 2315 typval_T *rettv, 2316 int evaluate, 2317 int want_string) // after "." operator 2318 { 2319 typval_T var2; 2320 int op; 2321 varnumber_T n1, n2; 2322 #ifdef FEAT_FLOAT 2323 int use_float = FALSE; 2324 float_T f1 = 0, f2 = 0; 2325 #endif 2326 int error = FALSE; 2327 2328 /* 2329 * Get the first variable. 2330 */ 2331 if (eval7(arg, rettv, evaluate, want_string) == FAIL) 2332 return FAIL; 2333 2334 /* 2335 * Repeat computing, until no '*', '/' or '%' is following. 2336 */ 2337 for (;;) 2338 { 2339 op = **arg; 2340 if (op != '*' && op != '/' && op != '%') 2341 break; 2342 2343 if (evaluate) 2344 { 2345 #ifdef FEAT_FLOAT 2346 if (rettv->v_type == VAR_FLOAT) 2347 { 2348 f1 = rettv->vval.v_float; 2349 use_float = TRUE; 2350 n1 = 0; 2351 } 2352 else 2353 #endif 2354 n1 = tv_get_number_chk(rettv, &error); 2355 clear_tv(rettv); 2356 if (error) 2357 return FAIL; 2358 } 2359 else 2360 n1 = 0; 2361 2362 /* 2363 * Get the second variable. 2364 */ 2365 *arg = skipwhite(*arg + 1); 2366 if (eval7(arg, &var2, evaluate, FALSE) == FAIL) 2367 return FAIL; 2368 2369 if (evaluate) 2370 { 2371 #ifdef FEAT_FLOAT 2372 if (var2.v_type == VAR_FLOAT) 2373 { 2374 if (!use_float) 2375 { 2376 f1 = n1; 2377 use_float = TRUE; 2378 } 2379 f2 = var2.vval.v_float; 2380 n2 = 0; 2381 } 2382 else 2383 #endif 2384 { 2385 n2 = tv_get_number_chk(&var2, &error); 2386 clear_tv(&var2); 2387 if (error) 2388 return FAIL; 2389 #ifdef FEAT_FLOAT 2390 if (use_float) 2391 f2 = n2; 2392 #endif 2393 } 2394 2395 /* 2396 * Compute the result. 2397 * When either side is a float the result is a float. 2398 */ 2399 #ifdef FEAT_FLOAT 2400 if (use_float) 2401 { 2402 if (op == '*') 2403 f1 = f1 * f2; 2404 else if (op == '/') 2405 { 2406 # ifdef VMS 2407 // VMS crashes on divide by zero, work around it 2408 if (f2 == 0.0) 2409 { 2410 if (f1 == 0) 2411 f1 = -1 * __F_FLT_MAX - 1L; // similar to NaN 2412 else if (f1 < 0) 2413 f1 = -1 * __F_FLT_MAX; 2414 else 2415 f1 = __F_FLT_MAX; 2416 } 2417 else 2418 f1 = f1 / f2; 2419 # else 2420 // We rely on the floating point library to handle divide 2421 // by zero to result in "inf" and not a crash. 2422 f1 = f1 / f2; 2423 # endif 2424 } 2425 else 2426 { 2427 emsg(_("E804: Cannot use '%' with Float")); 2428 return FAIL; 2429 } 2430 rettv->v_type = VAR_FLOAT; 2431 rettv->vval.v_float = f1; 2432 } 2433 else 2434 #endif 2435 { 2436 if (op == '*') 2437 n1 = n1 * n2; 2438 else if (op == '/') 2439 n1 = num_divide(n1, n2); 2440 else 2441 n1 = num_modulus(n1, n2); 2442 2443 rettv->v_type = VAR_NUMBER; 2444 rettv->vval.v_number = n1; 2445 } 2446 } 2447 } 2448 2449 return OK; 2450 } 2451 2452 /* 2453 * Handle sixth level expression: 2454 * number number constant 2455 * 0zFFFFFFFF Blob constant 2456 * "string" string constant 2457 * 'string' literal string constant 2458 * &option-name option value 2459 * @r register contents 2460 * identifier variable value 2461 * function() function call 2462 * $VAR environment variable 2463 * (expression) nested expression 2464 * [expr, expr] List 2465 * {key: val, key: val} Dictionary 2466 * #{key: val, key: val} Dictionary with literal keys 2467 * 2468 * Also handle: 2469 * ! in front logical NOT 2470 * - in front unary minus 2471 * + in front unary plus (ignored) 2472 * trailing [] subscript in String or List 2473 * trailing .name entry in Dictionary 2474 * trailing ->name() method call 2475 * 2476 * "arg" must point to the first non-white of the expression. 2477 * "arg" is advanced to the next non-white after the recognized expression. 2478 * 2479 * Return OK or FAIL. 2480 */ 2481 static int 2482 eval7( 2483 char_u **arg, 2484 typval_T *rettv, 2485 int evaluate, 2486 int want_string UNUSED) // after "." operator 2487 { 2488 varnumber_T n; 2489 int len; 2490 char_u *s; 2491 char_u *start_leader, *end_leader; 2492 int ret = OK; 2493 char_u *alias; 2494 2495 /* 2496 * Initialise variable so that clear_tv() can't mistake this for a 2497 * string and free a string that isn't there. 2498 */ 2499 rettv->v_type = VAR_UNKNOWN; 2500 2501 /* 2502 * Skip '!', '-' and '+' characters. They are handled later. 2503 */ 2504 start_leader = *arg; 2505 while (**arg == '!' || **arg == '-' || **arg == '+') 2506 *arg = skipwhite(*arg + 1); 2507 end_leader = *arg; 2508 2509 if (**arg == '.' && (!isdigit(*(*arg + 1)) 2510 #ifdef FEAT_FLOAT 2511 || current_sctx.sc_version < 2 2512 #endif 2513 )) 2514 { 2515 semsg(_(e_invexpr2), *arg); 2516 ++*arg; 2517 return FAIL; 2518 } 2519 2520 switch (**arg) 2521 { 2522 /* 2523 * Number constant. 2524 */ 2525 case '0': 2526 case '1': 2527 case '2': 2528 case '3': 2529 case '4': 2530 case '5': 2531 case '6': 2532 case '7': 2533 case '8': 2534 case '9': 2535 case '.': 2536 { 2537 #ifdef FEAT_FLOAT 2538 char_u *p; 2539 int get_float = FALSE; 2540 2541 // We accept a float when the format matches 2542 // "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?". This is very 2543 // strict to avoid backwards compatibility problems. 2544 // With script version 2 and later the leading digit can be 2545 // omitted. 2546 // Don't look for a float after the "." operator, so that 2547 // ":let vers = 1.2.3" doesn't fail. 2548 if (**arg == '.') 2549 p = *arg; 2550 else 2551 p = skipdigits(*arg + 1); 2552 if (!want_string && p[0] == '.' && vim_isdigit(p[1])) 2553 { 2554 get_float = TRUE; 2555 p = skipdigits(p + 2); 2556 if (*p == 'e' || *p == 'E') 2557 { 2558 ++p; 2559 if (*p == '-' || *p == '+') 2560 ++p; 2561 if (!vim_isdigit(*p)) 2562 get_float = FALSE; 2563 else 2564 p = skipdigits(p + 1); 2565 } 2566 if (ASCII_ISALPHA(*p) || *p == '.') 2567 get_float = FALSE; 2568 } 2569 if (get_float) 2570 { 2571 float_T f; 2572 2573 *arg += string2float(*arg, &f); 2574 if (evaluate) 2575 { 2576 rettv->v_type = VAR_FLOAT; 2577 rettv->vval.v_float = f; 2578 } 2579 } 2580 else 2581 #endif 2582 if (**arg == '0' && ((*arg)[1] == 'z' || (*arg)[1] == 'Z')) 2583 { 2584 char_u *bp; 2585 blob_T *blob = NULL; // init for gcc 2586 2587 // Blob constant: 0z0123456789abcdef 2588 if (evaluate) 2589 blob = blob_alloc(); 2590 for (bp = *arg + 2; vim_isxdigit(bp[0]); bp += 2) 2591 { 2592 if (!vim_isxdigit(bp[1])) 2593 { 2594 if (blob != NULL) 2595 { 2596 emsg(_("E973: Blob literal should have an even number of hex characters")); 2597 ga_clear(&blob->bv_ga); 2598 VIM_CLEAR(blob); 2599 } 2600 ret = FAIL; 2601 break; 2602 } 2603 if (blob != NULL) 2604 ga_append(&blob->bv_ga, 2605 (hex2nr(*bp) << 4) + hex2nr(*(bp+1))); 2606 if (bp[2] == '.' && vim_isxdigit(bp[3])) 2607 ++bp; 2608 } 2609 if (blob != NULL) 2610 rettv_blob_set(rettv, blob); 2611 *arg = bp; 2612 } 2613 else 2614 { 2615 // decimal, hex or octal number 2616 vim_str2nr(*arg, NULL, &len, current_sctx.sc_version >= 4 2617 ? STR2NR_NO_OCT + STR2NR_QUOTE 2618 : STR2NR_ALL, &n, NULL, 0, TRUE); 2619 if (len == 0) 2620 { 2621 semsg(_(e_invexpr2), *arg); 2622 ret = FAIL; 2623 break; 2624 } 2625 *arg += len; 2626 if (evaluate) 2627 { 2628 rettv->v_type = VAR_NUMBER; 2629 rettv->vval.v_number = n; 2630 } 2631 } 2632 break; 2633 } 2634 2635 /* 2636 * String constant: "string". 2637 */ 2638 case '"': ret = get_string_tv(arg, rettv, evaluate); 2639 break; 2640 2641 /* 2642 * Literal string constant: 'str''ing'. 2643 */ 2644 case '\'': ret = get_lit_string_tv(arg, rettv, evaluate); 2645 break; 2646 2647 /* 2648 * List: [expr, expr] 2649 */ 2650 case '[': ret = get_list_tv(arg, rettv, evaluate); 2651 break; 2652 2653 /* 2654 * Dictionary: #{key: val, key: val} 2655 */ 2656 case '#': if ((*arg)[1] == '{') 2657 { 2658 ++*arg; 2659 ret = dict_get_tv(arg, rettv, evaluate, TRUE); 2660 } 2661 else 2662 ret = NOTDONE; 2663 break; 2664 2665 /* 2666 * Lambda: {arg, arg -> expr} 2667 * Dictionary: {'key': val, 'key': val} 2668 */ 2669 case '{': ret = get_lambda_tv(arg, rettv, evaluate); 2670 if (ret == NOTDONE) 2671 ret = dict_get_tv(arg, rettv, evaluate, FALSE); 2672 break; 2673 2674 /* 2675 * Option value: &name 2676 */ 2677 case '&': ret = get_option_tv(arg, rettv, evaluate); 2678 break; 2679 2680 /* 2681 * Environment variable: $VAR. 2682 */ 2683 case '$': ret = get_env_tv(arg, rettv, evaluate); 2684 break; 2685 2686 /* 2687 * Register contents: @r. 2688 */ 2689 case '@': ++*arg; 2690 if (evaluate) 2691 { 2692 rettv->v_type = VAR_STRING; 2693 rettv->vval.v_string = get_reg_contents(**arg, 2694 GREG_EXPR_SRC); 2695 } 2696 if (**arg != NUL) 2697 ++*arg; 2698 break; 2699 2700 /* 2701 * nested expression: (expression). 2702 */ 2703 case '(': *arg = skipwhite(*arg + 1); 2704 ret = eval1(arg, rettv, evaluate); // recursive! 2705 if (**arg == ')') 2706 ++*arg; 2707 else if (ret == OK) 2708 { 2709 emsg(_("E110: Missing ')'")); 2710 clear_tv(rettv); 2711 ret = FAIL; 2712 } 2713 break; 2714 2715 default: ret = NOTDONE; 2716 break; 2717 } 2718 2719 if (ret == NOTDONE) 2720 { 2721 /* 2722 * Must be a variable or function name. 2723 * Can also be a curly-braces kind of name: {expr}. 2724 */ 2725 s = *arg; 2726 len = get_name_len(arg, &alias, evaluate, TRUE); 2727 if (alias != NULL) 2728 s = alias; 2729 2730 if (len <= 0) 2731 ret = FAIL; 2732 else 2733 { 2734 if (**arg == '(') // recursive! 2735 ret = eval_func(arg, s, len, rettv, evaluate, NULL); 2736 else if (evaluate) 2737 ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE); 2738 else 2739 { 2740 check_vars(s, len); 2741 ret = OK; 2742 } 2743 } 2744 vim_free(alias); 2745 } 2746 2747 *arg = skipwhite(*arg); 2748 2749 // Handle following '[', '(' and '.' for expr[expr], expr.name, 2750 // expr(expr), expr->name(expr) 2751 if (ret == OK) 2752 ret = handle_subscript(arg, rettv, evaluate, TRUE, 2753 start_leader, &end_leader); 2754 2755 /* 2756 * Apply logical NOT and unary '-', from right to left, ignore '+'. 2757 */ 2758 if (ret == OK && evaluate && end_leader > start_leader) 2759 ret = eval7_leader(rettv, start_leader, &end_leader); 2760 return ret; 2761 } 2762 2763 /* 2764 * Apply the leading "!" and "-" before an eval7 expression to "rettv". 2765 * Adjusts "end_leaderp" until it is at "start_leader". 2766 */ 2767 static int 2768 eval7_leader(typval_T *rettv, char_u *start_leader, char_u **end_leaderp) 2769 { 2770 char_u *end_leader = *end_leaderp; 2771 int ret = OK; 2772 int error = FALSE; 2773 varnumber_T val = 0; 2774 #ifdef FEAT_FLOAT 2775 float_T f = 0.0; 2776 2777 if (rettv->v_type == VAR_FLOAT) 2778 f = rettv->vval.v_float; 2779 else 2780 #endif 2781 val = tv_get_number_chk(rettv, &error); 2782 if (error) 2783 { 2784 clear_tv(rettv); 2785 ret = FAIL; 2786 } 2787 else 2788 { 2789 while (end_leader > start_leader) 2790 { 2791 --end_leader; 2792 if (*end_leader == '!') 2793 { 2794 #ifdef FEAT_FLOAT 2795 if (rettv->v_type == VAR_FLOAT) 2796 f = !f; 2797 else 2798 #endif 2799 val = !val; 2800 } 2801 else if (*end_leader == '-') 2802 { 2803 #ifdef FEAT_FLOAT 2804 if (rettv->v_type == VAR_FLOAT) 2805 f = -f; 2806 else 2807 #endif 2808 val = -val; 2809 } 2810 } 2811 #ifdef FEAT_FLOAT 2812 if (rettv->v_type == VAR_FLOAT) 2813 { 2814 clear_tv(rettv); 2815 rettv->vval.v_float = f; 2816 } 2817 else 2818 #endif 2819 { 2820 clear_tv(rettv); 2821 rettv->v_type = VAR_NUMBER; 2822 rettv->vval.v_number = val; 2823 } 2824 } 2825 *end_leaderp = end_leader; 2826 return ret; 2827 } 2828 2829 /* 2830 * Call the function referred to in "rettv". 2831 */ 2832 static int 2833 call_func_rettv( 2834 char_u **arg, 2835 typval_T *rettv, 2836 int evaluate, 2837 dict_T *selfdict, 2838 typval_T *basetv) 2839 { 2840 partial_T *pt = NULL; 2841 funcexe_T funcexe; 2842 typval_T functv; 2843 char_u *s; 2844 int ret; 2845 2846 // need to copy the funcref so that we can clear rettv 2847 if (evaluate) 2848 { 2849 functv = *rettv; 2850 rettv->v_type = VAR_UNKNOWN; 2851 2852 // Invoke the function. Recursive! 2853 if (functv.v_type == VAR_PARTIAL) 2854 { 2855 pt = functv.vval.v_partial; 2856 s = partial_name(pt); 2857 } 2858 else 2859 s = functv.vval.v_string; 2860 } 2861 else 2862 s = (char_u *)""; 2863 2864 vim_memset(&funcexe, 0, sizeof(funcexe)); 2865 funcexe.firstline = curwin->w_cursor.lnum; 2866 funcexe.lastline = curwin->w_cursor.lnum; 2867 funcexe.evaluate = evaluate; 2868 funcexe.partial = pt; 2869 funcexe.selfdict = selfdict; 2870 funcexe.basetv = basetv; 2871 ret = get_func_tv(s, -1, rettv, arg, &funcexe); 2872 2873 // Clear the funcref afterwards, so that deleting it while 2874 // evaluating the arguments is possible (see test55). 2875 if (evaluate) 2876 clear_tv(&functv); 2877 2878 return ret; 2879 } 2880 2881 /* 2882 * Evaluate "->method()". 2883 * "*arg" points to the '-'. 2884 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 2885 */ 2886 static int 2887 eval_lambda( 2888 char_u **arg, 2889 typval_T *rettv, 2890 int evaluate, 2891 int verbose) // give error messages 2892 { 2893 typval_T base = *rettv; 2894 int ret; 2895 2896 // Skip over the ->. 2897 *arg += 2; 2898 rettv->v_type = VAR_UNKNOWN; 2899 2900 ret = get_lambda_tv(arg, rettv, evaluate); 2901 if (ret != OK) 2902 return FAIL; 2903 else if (**arg != '(') 2904 { 2905 if (verbose) 2906 { 2907 if (*skipwhite(*arg) == '(') 2908 semsg(_(e_nowhitespace)); 2909 else 2910 semsg(_(e_missingparen), "lambda"); 2911 } 2912 clear_tv(rettv); 2913 ret = FAIL; 2914 } 2915 else 2916 ret = call_func_rettv(arg, rettv, evaluate, NULL, &base); 2917 2918 // Clear the funcref afterwards, so that deleting it while 2919 // evaluating the arguments is possible (see test55). 2920 if (evaluate) 2921 clear_tv(&base); 2922 2923 return ret; 2924 } 2925 2926 /* 2927 * Evaluate "->method()". 2928 * "*arg" points to the '-'. 2929 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 2930 */ 2931 static int 2932 eval_method( 2933 char_u **arg, 2934 typval_T *rettv, 2935 int evaluate, 2936 int verbose) // give error messages 2937 { 2938 char_u *name; 2939 long len; 2940 char_u *alias; 2941 typval_T base = *rettv; 2942 int ret; 2943 2944 // Skip over the ->. 2945 *arg += 2; 2946 rettv->v_type = VAR_UNKNOWN; 2947 2948 name = *arg; 2949 len = get_name_len(arg, &alias, evaluate, TRUE); 2950 if (alias != NULL) 2951 name = alias; 2952 2953 if (len <= 0) 2954 { 2955 if (verbose) 2956 emsg(_("E260: Missing name after ->")); 2957 ret = FAIL; 2958 } 2959 else 2960 { 2961 if (**arg != '(') 2962 { 2963 if (verbose) 2964 semsg(_(e_missingparen), name); 2965 ret = FAIL; 2966 } 2967 else if (VIM_ISWHITE((*arg)[-1])) 2968 { 2969 if (verbose) 2970 semsg(_(e_nowhitespace)); 2971 ret = FAIL; 2972 } 2973 else 2974 ret = eval_func(arg, name, len, rettv, evaluate, &base); 2975 } 2976 2977 // Clear the funcref afterwards, so that deleting it while 2978 // evaluating the arguments is possible (see test55). 2979 if (evaluate) 2980 clear_tv(&base); 2981 2982 return ret; 2983 } 2984 2985 /* 2986 * Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key". 2987 * "*arg" points to the '[' or '.'. 2988 * Returns FAIL or OK. "*arg" is advanced to after the ']'. 2989 */ 2990 static int 2991 eval_index( 2992 char_u **arg, 2993 typval_T *rettv, 2994 int evaluate, 2995 int verbose) // give error messages 2996 { 2997 int empty1 = FALSE, empty2 = FALSE; 2998 typval_T var1, var2; 2999 long i; 3000 long n1, n2 = 0; 3001 long len = -1; 3002 int range = FALSE; 3003 char_u *s; 3004 char_u *key = NULL; 3005 3006 switch (rettv->v_type) 3007 { 3008 case VAR_FUNC: 3009 case VAR_PARTIAL: 3010 if (verbose) 3011 emsg(_("E695: Cannot index a Funcref")); 3012 return FAIL; 3013 case VAR_FLOAT: 3014 #ifdef FEAT_FLOAT 3015 if (verbose) 3016 emsg(_(e_float_as_string)); 3017 return FAIL; 3018 #endif 3019 case VAR_SPECIAL: 3020 case VAR_JOB: 3021 case VAR_CHANNEL: 3022 if (verbose) 3023 emsg(_("E909: Cannot index a special variable")); 3024 return FAIL; 3025 case VAR_UNKNOWN: 3026 if (evaluate) 3027 return FAIL; 3028 // FALLTHROUGH 3029 3030 case VAR_STRING: 3031 case VAR_NUMBER: 3032 case VAR_LIST: 3033 case VAR_DICT: 3034 case VAR_BLOB: 3035 break; 3036 } 3037 3038 init_tv(&var1); 3039 init_tv(&var2); 3040 if (**arg == '.') 3041 { 3042 /* 3043 * dict.name 3044 */ 3045 key = *arg + 1; 3046 for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len) 3047 ; 3048 if (len == 0) 3049 return FAIL; 3050 *arg = skipwhite(key + len); 3051 } 3052 else 3053 { 3054 /* 3055 * something[idx] 3056 * 3057 * Get the (first) variable from inside the []. 3058 */ 3059 *arg = skipwhite(*arg + 1); 3060 if (**arg == ':') 3061 empty1 = TRUE; 3062 else if (eval1(arg, &var1, evaluate) == FAIL) // recursive! 3063 return FAIL; 3064 else if (evaluate && tv_get_string_chk(&var1) == NULL) 3065 { 3066 // not a number or string 3067 clear_tv(&var1); 3068 return FAIL; 3069 } 3070 3071 /* 3072 * Get the second variable from inside the [:]. 3073 */ 3074 if (**arg == ':') 3075 { 3076 range = TRUE; 3077 *arg = skipwhite(*arg + 1); 3078 if (**arg == ']') 3079 empty2 = TRUE; 3080 else if (eval1(arg, &var2, evaluate) == FAIL) // recursive! 3081 { 3082 if (!empty1) 3083 clear_tv(&var1); 3084 return FAIL; 3085 } 3086 else if (evaluate && tv_get_string_chk(&var2) == NULL) 3087 { 3088 // not a number or string 3089 if (!empty1) 3090 clear_tv(&var1); 3091 clear_tv(&var2); 3092 return FAIL; 3093 } 3094 } 3095 3096 // Check for the ']'. 3097 if (**arg != ']') 3098 { 3099 if (verbose) 3100 emsg(_(e_missbrac)); 3101 clear_tv(&var1); 3102 if (range) 3103 clear_tv(&var2); 3104 return FAIL; 3105 } 3106 *arg = skipwhite(*arg + 1); // skip the ']' 3107 } 3108 3109 if (evaluate) 3110 { 3111 n1 = 0; 3112 if (!empty1 && rettv->v_type != VAR_DICT) 3113 { 3114 n1 = tv_get_number(&var1); 3115 clear_tv(&var1); 3116 } 3117 if (range) 3118 { 3119 if (empty2) 3120 n2 = -1; 3121 else 3122 { 3123 n2 = tv_get_number(&var2); 3124 clear_tv(&var2); 3125 } 3126 } 3127 3128 switch (rettv->v_type) 3129 { 3130 case VAR_UNKNOWN: 3131 case VAR_FUNC: 3132 case VAR_PARTIAL: 3133 case VAR_FLOAT: 3134 case VAR_SPECIAL: 3135 case VAR_JOB: 3136 case VAR_CHANNEL: 3137 break; // not evaluating, skipping over subscript 3138 3139 case VAR_NUMBER: 3140 case VAR_STRING: 3141 s = tv_get_string(rettv); 3142 len = (long)STRLEN(s); 3143 if (range) 3144 { 3145 // The resulting variable is a substring. If the indexes 3146 // are out of range the result is empty. 3147 if (n1 < 0) 3148 { 3149 n1 = len + n1; 3150 if (n1 < 0) 3151 n1 = 0; 3152 } 3153 if (n2 < 0) 3154 n2 = len + n2; 3155 else if (n2 >= len) 3156 n2 = len; 3157 if (n1 >= len || n2 < 0 || n1 > n2) 3158 s = NULL; 3159 else 3160 s = vim_strnsave(s + n1, (int)(n2 - n1 + 1)); 3161 } 3162 else 3163 { 3164 // The resulting variable is a string of a single 3165 // character. If the index is too big or negative the 3166 // result is empty. 3167 if (n1 >= len || n1 < 0) 3168 s = NULL; 3169 else 3170 s = vim_strnsave(s + n1, 1); 3171 } 3172 clear_tv(rettv); 3173 rettv->v_type = VAR_STRING; 3174 rettv->vval.v_string = s; 3175 break; 3176 3177 case VAR_BLOB: 3178 len = blob_len(rettv->vval.v_blob); 3179 if (range) 3180 { 3181 // The resulting variable is a sub-blob. If the indexes 3182 // are out of range the result is empty. 3183 if (n1 < 0) 3184 { 3185 n1 = len + n1; 3186 if (n1 < 0) 3187 n1 = 0; 3188 } 3189 if (n2 < 0) 3190 n2 = len + n2; 3191 else if (n2 >= len) 3192 n2 = len - 1; 3193 if (n1 >= len || n2 < 0 || n1 > n2) 3194 { 3195 clear_tv(rettv); 3196 rettv->v_type = VAR_BLOB; 3197 rettv->vval.v_blob = NULL; 3198 } 3199 else 3200 { 3201 blob_T *blob = blob_alloc(); 3202 3203 if (blob != NULL) 3204 { 3205 if (ga_grow(&blob->bv_ga, n2 - n1 + 1) == FAIL) 3206 { 3207 blob_free(blob); 3208 return FAIL; 3209 } 3210 blob->bv_ga.ga_len = n2 - n1 + 1; 3211 for (i = n1; i <= n2; i++) 3212 blob_set(blob, i - n1, 3213 blob_get(rettv->vval.v_blob, i)); 3214 3215 clear_tv(rettv); 3216 rettv_blob_set(rettv, blob); 3217 } 3218 } 3219 } 3220 else 3221 { 3222 // The resulting variable is a byte value. 3223 // If the index is too big or negative that is an error. 3224 if (n1 < 0) 3225 n1 = len + n1; 3226 if (n1 < len && n1 >= 0) 3227 { 3228 int v = blob_get(rettv->vval.v_blob, n1); 3229 3230 clear_tv(rettv); 3231 rettv->v_type = VAR_NUMBER; 3232 rettv->vval.v_number = v; 3233 } 3234 else 3235 semsg(_(e_blobidx), n1); 3236 } 3237 break; 3238 3239 case VAR_LIST: 3240 len = list_len(rettv->vval.v_list); 3241 if (n1 < 0) 3242 n1 = len + n1; 3243 if (!empty1 && (n1 < 0 || n1 >= len)) 3244 { 3245 // For a range we allow invalid values and return an empty 3246 // list. A list index out of range is an error. 3247 if (!range) 3248 { 3249 if (verbose) 3250 semsg(_(e_listidx), n1); 3251 return FAIL; 3252 } 3253 n1 = len; 3254 } 3255 if (range) 3256 { 3257 list_T *l; 3258 listitem_T *item; 3259 3260 if (n2 < 0) 3261 n2 = len + n2; 3262 else if (n2 >= len) 3263 n2 = len - 1; 3264 if (!empty2 && (n2 < 0 || n2 + 1 < n1)) 3265 n2 = -1; 3266 l = list_alloc(); 3267 if (l == NULL) 3268 return FAIL; 3269 for (item = list_find(rettv->vval.v_list, n1); 3270 n1 <= n2; ++n1) 3271 { 3272 if (list_append_tv(l, &item->li_tv) == FAIL) 3273 { 3274 list_free(l); 3275 return FAIL; 3276 } 3277 item = item->li_next; 3278 } 3279 clear_tv(rettv); 3280 rettv_list_set(rettv, l); 3281 } 3282 else 3283 { 3284 copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1); 3285 clear_tv(rettv); 3286 *rettv = var1; 3287 } 3288 break; 3289 3290 case VAR_DICT: 3291 if (range) 3292 { 3293 if (verbose) 3294 emsg(_(e_dictrange)); 3295 if (len == -1) 3296 clear_tv(&var1); 3297 return FAIL; 3298 } 3299 { 3300 dictitem_T *item; 3301 3302 if (len == -1) 3303 { 3304 key = tv_get_string_chk(&var1); 3305 if (key == NULL) 3306 { 3307 clear_tv(&var1); 3308 return FAIL; 3309 } 3310 } 3311 3312 item = dict_find(rettv->vval.v_dict, key, (int)len); 3313 3314 if (item == NULL && verbose) 3315 semsg(_(e_dictkey), key); 3316 if (len == -1) 3317 clear_tv(&var1); 3318 if (item == NULL) 3319 return FAIL; 3320 3321 copy_tv(&item->di_tv, &var1); 3322 clear_tv(rettv); 3323 *rettv = var1; 3324 } 3325 break; 3326 } 3327 } 3328 3329 return OK; 3330 } 3331 3332 /* 3333 * Get an option value. 3334 * "arg" points to the '&' or '+' before the option name. 3335 * "arg" is advanced to character after the option name. 3336 * Return OK or FAIL. 3337 */ 3338 int 3339 get_option_tv( 3340 char_u **arg, 3341 typval_T *rettv, // when NULL, only check if option exists 3342 int evaluate) 3343 { 3344 char_u *option_end; 3345 long numval; 3346 char_u *stringval; 3347 int opt_type; 3348 int c; 3349 int working = (**arg == '+'); // has("+option") 3350 int ret = OK; 3351 int opt_flags; 3352 3353 /* 3354 * Isolate the option name and find its value. 3355 */ 3356 option_end = find_option_end(arg, &opt_flags); 3357 if (option_end == NULL) 3358 { 3359 if (rettv != NULL) 3360 semsg(_("E112: Option name missing: %s"), *arg); 3361 return FAIL; 3362 } 3363 3364 if (!evaluate) 3365 { 3366 *arg = option_end; 3367 return OK; 3368 } 3369 3370 c = *option_end; 3371 *option_end = NUL; 3372 opt_type = get_option_value(*arg, &numval, 3373 rettv == NULL ? NULL : &stringval, opt_flags); 3374 3375 if (opt_type == -3) // invalid name 3376 { 3377 if (rettv != NULL) 3378 semsg(_("E113: Unknown option: %s"), *arg); 3379 ret = FAIL; 3380 } 3381 else if (rettv != NULL) 3382 { 3383 if (opt_type == -2) // hidden string option 3384 { 3385 rettv->v_type = VAR_STRING; 3386 rettv->vval.v_string = NULL; 3387 } 3388 else if (opt_type == -1) // hidden number option 3389 { 3390 rettv->v_type = VAR_NUMBER; 3391 rettv->vval.v_number = 0; 3392 } 3393 else if (opt_type == 1) // number option 3394 { 3395 rettv->v_type = VAR_NUMBER; 3396 rettv->vval.v_number = numval; 3397 } 3398 else // string option 3399 { 3400 rettv->v_type = VAR_STRING; 3401 rettv->vval.v_string = stringval; 3402 } 3403 } 3404 else if (working && (opt_type == -2 || opt_type == -1)) 3405 ret = FAIL; 3406 3407 *option_end = c; // put back for error messages 3408 *arg = option_end; 3409 3410 return ret; 3411 } 3412 3413 /* 3414 * Allocate a variable for a string constant. 3415 * Return OK or FAIL. 3416 */ 3417 static int 3418 get_string_tv(char_u **arg, typval_T *rettv, int evaluate) 3419 { 3420 char_u *p; 3421 char_u *name; 3422 int extra = 0; 3423 3424 /* 3425 * Find the end of the string, skipping backslashed characters. 3426 */ 3427 for (p = *arg + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p)) 3428 { 3429 if (*p == '\\' && p[1] != NUL) 3430 { 3431 ++p; 3432 // A "\<x>" form occupies at least 4 characters, and produces up 3433 // to 6 characters: reserve space for 2 extra 3434 if (*p == '<') 3435 extra += 2; 3436 } 3437 } 3438 3439 if (*p != '"') 3440 { 3441 semsg(_("E114: Missing quote: %s"), *arg); 3442 return FAIL; 3443 } 3444 3445 // If only parsing, set *arg and return here 3446 if (!evaluate) 3447 { 3448 *arg = p + 1; 3449 return OK; 3450 } 3451 3452 /* 3453 * Copy the string into allocated memory, handling backslashed 3454 * characters. 3455 */ 3456 name = alloc(p - *arg + extra); 3457 if (name == NULL) 3458 return FAIL; 3459 rettv->v_type = VAR_STRING; 3460 rettv->vval.v_string = name; 3461 3462 for (p = *arg + 1; *p != NUL && *p != '"'; ) 3463 { 3464 if (*p == '\\') 3465 { 3466 switch (*++p) 3467 { 3468 case 'b': *name++ = BS; ++p; break; 3469 case 'e': *name++ = ESC; ++p; break; 3470 case 'f': *name++ = FF; ++p; break; 3471 case 'n': *name++ = NL; ++p; break; 3472 case 'r': *name++ = CAR; ++p; break; 3473 case 't': *name++ = TAB; ++p; break; 3474 3475 case 'X': // hex: "\x1", "\x12" 3476 case 'x': 3477 case 'u': // Unicode: "\u0023" 3478 case 'U': 3479 if (vim_isxdigit(p[1])) 3480 { 3481 int n, nr; 3482 int c = toupper(*p); 3483 3484 if (c == 'X') 3485 n = 2; 3486 else if (*p == 'u') 3487 n = 4; 3488 else 3489 n = 8; 3490 nr = 0; 3491 while (--n >= 0 && vim_isxdigit(p[1])) 3492 { 3493 ++p; 3494 nr = (nr << 4) + hex2nr(*p); 3495 } 3496 ++p; 3497 // For "\u" store the number according to 3498 // 'encoding'. 3499 if (c != 'X') 3500 name += (*mb_char2bytes)(nr, name); 3501 else 3502 *name++ = nr; 3503 } 3504 break; 3505 3506 // octal: "\1", "\12", "\123" 3507 case '0': 3508 case '1': 3509 case '2': 3510 case '3': 3511 case '4': 3512 case '5': 3513 case '6': 3514 case '7': *name = *p++ - '0'; 3515 if (*p >= '0' && *p <= '7') 3516 { 3517 *name = (*name << 3) + *p++ - '0'; 3518 if (*p >= '0' && *p <= '7') 3519 *name = (*name << 3) + *p++ - '0'; 3520 } 3521 ++name; 3522 break; 3523 3524 // Special key, e.g.: "\<C-W>" 3525 case '<': extra = trans_special(&p, name, TRUE, TRUE, 3526 TRUE, NULL); 3527 if (extra != 0) 3528 { 3529 name += extra; 3530 break; 3531 } 3532 // FALLTHROUGH 3533 3534 default: MB_COPY_CHAR(p, name); 3535 break; 3536 } 3537 } 3538 else 3539 MB_COPY_CHAR(p, name); 3540 3541 } 3542 *name = NUL; 3543 if (*p != NUL) // just in case 3544 ++p; 3545 *arg = p; 3546 3547 return OK; 3548 } 3549 3550 /* 3551 * Allocate a variable for a 'str''ing' constant. 3552 * Return OK or FAIL. 3553 */ 3554 static int 3555 get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate) 3556 { 3557 char_u *p; 3558 char_u *str; 3559 int reduce = 0; 3560 3561 /* 3562 * Find the end of the string, skipping ''. 3563 */ 3564 for (p = *arg + 1; *p != NUL; MB_PTR_ADV(p)) 3565 { 3566 if (*p == '\'') 3567 { 3568 if (p[1] != '\'') 3569 break; 3570 ++reduce; 3571 ++p; 3572 } 3573 } 3574 3575 if (*p != '\'') 3576 { 3577 semsg(_("E115: Missing quote: %s"), *arg); 3578 return FAIL; 3579 } 3580 3581 // If only parsing return after setting "*arg" 3582 if (!evaluate) 3583 { 3584 *arg = p + 1; 3585 return OK; 3586 } 3587 3588 /* 3589 * Copy the string into allocated memory, handling '' to ' reduction. 3590 */ 3591 str = alloc((p - *arg) - reduce); 3592 if (str == NULL) 3593 return FAIL; 3594 rettv->v_type = VAR_STRING; 3595 rettv->vval.v_string = str; 3596 3597 for (p = *arg + 1; *p != NUL; ) 3598 { 3599 if (*p == '\'') 3600 { 3601 if (p[1] != '\'') 3602 break; 3603 ++p; 3604 } 3605 MB_COPY_CHAR(p, str); 3606 } 3607 *str = NUL; 3608 *arg = p + 1; 3609 3610 return OK; 3611 } 3612 3613 /* 3614 * Return the function name of the partial. 3615 */ 3616 char_u * 3617 partial_name(partial_T *pt) 3618 { 3619 if (pt->pt_name != NULL) 3620 return pt->pt_name; 3621 return pt->pt_func->uf_name; 3622 } 3623 3624 static void 3625 partial_free(partial_T *pt) 3626 { 3627 int i; 3628 3629 for (i = 0; i < pt->pt_argc; ++i) 3630 clear_tv(&pt->pt_argv[i]); 3631 vim_free(pt->pt_argv); 3632 dict_unref(pt->pt_dict); 3633 if (pt->pt_name != NULL) 3634 { 3635 func_unref(pt->pt_name); 3636 vim_free(pt->pt_name); 3637 } 3638 else 3639 func_ptr_unref(pt->pt_func); 3640 vim_free(pt); 3641 } 3642 3643 /* 3644 * Unreference a closure: decrement the reference count and free it when it 3645 * becomes zero. 3646 */ 3647 void 3648 partial_unref(partial_T *pt) 3649 { 3650 if (pt != NULL && --pt->pt_refcount <= 0) 3651 partial_free(pt); 3652 } 3653 3654 static int tv_equal_recurse_limit; 3655 3656 static int 3657 func_equal( 3658 typval_T *tv1, 3659 typval_T *tv2, 3660 int ic) // ignore case 3661 { 3662 char_u *s1, *s2; 3663 dict_T *d1, *d2; 3664 int a1, a2; 3665 int i; 3666 3667 // empty and NULL function name considered the same 3668 s1 = tv1->v_type == VAR_FUNC ? tv1->vval.v_string 3669 : partial_name(tv1->vval.v_partial); 3670 if (s1 != NULL && *s1 == NUL) 3671 s1 = NULL; 3672 s2 = tv2->v_type == VAR_FUNC ? tv2->vval.v_string 3673 : partial_name(tv2->vval.v_partial); 3674 if (s2 != NULL && *s2 == NUL) 3675 s2 = NULL; 3676 if (s1 == NULL || s2 == NULL) 3677 { 3678 if (s1 != s2) 3679 return FALSE; 3680 } 3681 else if (STRCMP(s1, s2) != 0) 3682 return FALSE; 3683 3684 // empty dict and NULL dict is different 3685 d1 = tv1->v_type == VAR_FUNC ? NULL : tv1->vval.v_partial->pt_dict; 3686 d2 = tv2->v_type == VAR_FUNC ? NULL : tv2->vval.v_partial->pt_dict; 3687 if (d1 == NULL || d2 == NULL) 3688 { 3689 if (d1 != d2) 3690 return FALSE; 3691 } 3692 else if (!dict_equal(d1, d2, ic, TRUE)) 3693 return FALSE; 3694 3695 // empty list and no list considered the same 3696 a1 = tv1->v_type == VAR_FUNC ? 0 : tv1->vval.v_partial->pt_argc; 3697 a2 = tv2->v_type == VAR_FUNC ? 0 : tv2->vval.v_partial->pt_argc; 3698 if (a1 != a2) 3699 return FALSE; 3700 for (i = 0; i < a1; ++i) 3701 if (!tv_equal(tv1->vval.v_partial->pt_argv + i, 3702 tv2->vval.v_partial->pt_argv + i, ic, TRUE)) 3703 return FALSE; 3704 3705 return TRUE; 3706 } 3707 3708 /* 3709 * Return TRUE if "tv1" and "tv2" have the same value. 3710 * Compares the items just like "==" would compare them, but strings and 3711 * numbers are different. Floats and numbers are also different. 3712 */ 3713 int 3714 tv_equal( 3715 typval_T *tv1, 3716 typval_T *tv2, 3717 int ic, // ignore case 3718 int recursive) // TRUE when used recursively 3719 { 3720 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 3721 char_u *s1, *s2; 3722 static int recursive_cnt = 0; // catch recursive loops 3723 int r; 3724 3725 // Catch lists and dicts that have an endless loop by limiting 3726 // recursiveness to a limit. We guess they are equal then. 3727 // A fixed limit has the problem of still taking an awful long time. 3728 // Reduce the limit every time running into it. That should work fine for 3729 // deeply linked structures that are not recursively linked and catch 3730 // recursiveness quickly. 3731 if (!recursive) 3732 tv_equal_recurse_limit = 1000; 3733 if (recursive_cnt >= tv_equal_recurse_limit) 3734 { 3735 --tv_equal_recurse_limit; 3736 return TRUE; 3737 } 3738 3739 // For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and 3740 // arguments. 3741 if ((tv1->v_type == VAR_FUNC 3742 || (tv1->v_type == VAR_PARTIAL && tv1->vval.v_partial != NULL)) 3743 && (tv2->v_type == VAR_FUNC 3744 || (tv2->v_type == VAR_PARTIAL && tv2->vval.v_partial != NULL))) 3745 { 3746 ++recursive_cnt; 3747 r = func_equal(tv1, tv2, ic); 3748 --recursive_cnt; 3749 return r; 3750 } 3751 3752 if (tv1->v_type != tv2->v_type) 3753 return FALSE; 3754 3755 switch (tv1->v_type) 3756 { 3757 case VAR_LIST: 3758 ++recursive_cnt; 3759 r = list_equal(tv1->vval.v_list, tv2->vval.v_list, ic, TRUE); 3760 --recursive_cnt; 3761 return r; 3762 3763 case VAR_DICT: 3764 ++recursive_cnt; 3765 r = dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic, TRUE); 3766 --recursive_cnt; 3767 return r; 3768 3769 case VAR_BLOB: 3770 return blob_equal(tv1->vval.v_blob, tv2->vval.v_blob); 3771 3772 case VAR_NUMBER: 3773 return tv1->vval.v_number == tv2->vval.v_number; 3774 3775 case VAR_STRING: 3776 s1 = tv_get_string_buf(tv1, buf1); 3777 s2 = tv_get_string_buf(tv2, buf2); 3778 return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0); 3779 3780 case VAR_SPECIAL: 3781 return tv1->vval.v_number == tv2->vval.v_number; 3782 3783 case VAR_FLOAT: 3784 #ifdef FEAT_FLOAT 3785 return tv1->vval.v_float == tv2->vval.v_float; 3786 #endif 3787 case VAR_JOB: 3788 #ifdef FEAT_JOB_CHANNEL 3789 return tv1->vval.v_job == tv2->vval.v_job; 3790 #endif 3791 case VAR_CHANNEL: 3792 #ifdef FEAT_JOB_CHANNEL 3793 return tv1->vval.v_channel == tv2->vval.v_channel; 3794 #endif 3795 case VAR_FUNC: 3796 case VAR_PARTIAL: 3797 case VAR_UNKNOWN: 3798 break; 3799 } 3800 3801 // VAR_UNKNOWN can be the result of a invalid expression, let's say it 3802 // does not equal anything, not even itself. 3803 return FALSE; 3804 } 3805 3806 /* 3807 * Return the next (unique) copy ID. 3808 * Used for serializing nested structures. 3809 */ 3810 int 3811 get_copyID(void) 3812 { 3813 current_copyID += COPYID_INC; 3814 return current_copyID; 3815 } 3816 3817 /* 3818 * Garbage collection for lists and dictionaries. 3819 * 3820 * We use reference counts to be able to free most items right away when they 3821 * are no longer used. But for composite items it's possible that it becomes 3822 * unused while the reference count is > 0: When there is a recursive 3823 * reference. Example: 3824 * :let l = [1, 2, 3] 3825 * :let d = {9: l} 3826 * :let l[1] = d 3827 * 3828 * Since this is quite unusual we handle this with garbage collection: every 3829 * once in a while find out which lists and dicts are not referenced from any 3830 * variable. 3831 * 3832 * Here is a good reference text about garbage collection (refers to Python 3833 * but it applies to all reference-counting mechanisms): 3834 * http://python.ca/nas/python/gc/ 3835 */ 3836 3837 /* 3838 * Do garbage collection for lists and dicts. 3839 * When "testing" is TRUE this is called from test_garbagecollect_now(). 3840 * Return TRUE if some memory was freed. 3841 */ 3842 int 3843 garbage_collect(int testing) 3844 { 3845 int copyID; 3846 int abort = FALSE; 3847 buf_T *buf; 3848 win_T *wp; 3849 int did_free = FALSE; 3850 tabpage_T *tp; 3851 3852 if (!testing) 3853 { 3854 // Only do this once. 3855 want_garbage_collect = FALSE; 3856 may_garbage_collect = FALSE; 3857 garbage_collect_at_exit = FALSE; 3858 } 3859 3860 // The execution stack can grow big, limit the size. 3861 if (exestack.ga_maxlen - exestack.ga_len > 500) 3862 { 3863 size_t new_len; 3864 char_u *pp; 3865 int n; 3866 3867 // Keep 150% of the current size, with a minimum of the growth size. 3868 n = exestack.ga_len / 2; 3869 if (n < exestack.ga_growsize) 3870 n = exestack.ga_growsize; 3871 3872 // Don't make it bigger though. 3873 if (exestack.ga_len + n < exestack.ga_maxlen) 3874 { 3875 new_len = exestack.ga_itemsize * (exestack.ga_len + n); 3876 pp = vim_realloc(exestack.ga_data, new_len); 3877 if (pp == NULL) 3878 return FAIL; 3879 exestack.ga_maxlen = exestack.ga_len + n; 3880 exestack.ga_data = pp; 3881 } 3882 } 3883 3884 // We advance by two because we add one for items referenced through 3885 // previous_funccal. 3886 copyID = get_copyID(); 3887 3888 /* 3889 * 1. Go through all accessible variables and mark all lists and dicts 3890 * with copyID. 3891 */ 3892 3893 // Don't free variables in the previous_funccal list unless they are only 3894 // referenced through previous_funccal. This must be first, because if 3895 // the item is referenced elsewhere the funccal must not be freed. 3896 abort = abort || set_ref_in_previous_funccal(copyID); 3897 3898 // script-local variables 3899 abort = abort || garbage_collect_scriptvars(copyID); 3900 3901 // buffer-local variables 3902 FOR_ALL_BUFFERS(buf) 3903 abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID, 3904 NULL, NULL); 3905 3906 // window-local variables 3907 FOR_ALL_TAB_WINDOWS(tp, wp) 3908 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3909 NULL, NULL); 3910 if (aucmd_win != NULL) 3911 abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID, 3912 NULL, NULL); 3913 #ifdef FEAT_PROP_POPUP 3914 for (wp = first_popupwin; wp != NULL; wp = wp->w_next) 3915 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3916 NULL, NULL); 3917 FOR_ALL_TABPAGES(tp) 3918 for (wp = tp->tp_first_popupwin; wp != NULL; wp = wp->w_next) 3919 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3920 NULL, NULL); 3921 #endif 3922 3923 // tabpage-local variables 3924 FOR_ALL_TABPAGES(tp) 3925 abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID, 3926 NULL, NULL); 3927 // global variables 3928 abort = abort || garbage_collect_globvars(copyID); 3929 3930 // function-local variables 3931 abort = abort || set_ref_in_call_stack(copyID); 3932 3933 // named functions (matters for closures) 3934 abort = abort || set_ref_in_functions(copyID); 3935 3936 // function call arguments, if v:testing is set. 3937 abort = abort || set_ref_in_func_args(copyID); 3938 3939 // v: vars 3940 abort = abort || garbage_collect_vimvars(copyID); 3941 3942 // callbacks in buffers 3943 abort = abort || set_ref_in_buffers(copyID); 3944 3945 #ifdef FEAT_LUA 3946 abort = abort || set_ref_in_lua(copyID); 3947 #endif 3948 3949 #ifdef FEAT_PYTHON 3950 abort = abort || set_ref_in_python(copyID); 3951 #endif 3952 3953 #ifdef FEAT_PYTHON3 3954 abort = abort || set_ref_in_python3(copyID); 3955 #endif 3956 3957 #ifdef FEAT_JOB_CHANNEL 3958 abort = abort || set_ref_in_channel(copyID); 3959 abort = abort || set_ref_in_job(copyID); 3960 #endif 3961 #ifdef FEAT_NETBEANS_INTG 3962 abort = abort || set_ref_in_nb_channel(copyID); 3963 #endif 3964 3965 #ifdef FEAT_TIMERS 3966 abort = abort || set_ref_in_timer(copyID); 3967 #endif 3968 3969 #ifdef FEAT_QUICKFIX 3970 abort = abort || set_ref_in_quickfix(copyID); 3971 #endif 3972 3973 #ifdef FEAT_TERMINAL 3974 abort = abort || set_ref_in_term(copyID); 3975 #endif 3976 3977 #ifdef FEAT_PROP_POPUP 3978 abort = abort || set_ref_in_popups(copyID); 3979 #endif 3980 3981 if (!abort) 3982 { 3983 /* 3984 * 2. Free lists and dictionaries that are not referenced. 3985 */ 3986 did_free = free_unref_items(copyID); 3987 3988 /* 3989 * 3. Check if any funccal can be freed now. 3990 * This may call us back recursively. 3991 */ 3992 free_unref_funccal(copyID, testing); 3993 } 3994 else if (p_verbose > 0) 3995 { 3996 verb_msg(_("Not enough memory to set references, garbage collection aborted!")); 3997 } 3998 3999 return did_free; 4000 } 4001 4002 /* 4003 * Free lists, dictionaries, channels and jobs that are no longer referenced. 4004 */ 4005 static int 4006 free_unref_items(int copyID) 4007 { 4008 int did_free = FALSE; 4009 4010 // Let all "free" functions know that we are here. This means no 4011 // dictionaries, lists, channels or jobs are to be freed, because we will 4012 // do that here. 4013 in_free_unref_items = TRUE; 4014 4015 /* 4016 * PASS 1: free the contents of the items. We don't free the items 4017 * themselves yet, so that it is possible to decrement refcount counters 4018 */ 4019 4020 // Go through the list of dicts and free items without the copyID. 4021 did_free |= dict_free_nonref(copyID); 4022 4023 // Go through the list of lists and free items without the copyID. 4024 did_free |= list_free_nonref(copyID); 4025 4026 #ifdef FEAT_JOB_CHANNEL 4027 // Go through the list of jobs and free items without the copyID. This 4028 // must happen before doing channels, because jobs refer to channels, but 4029 // the reference from the channel to the job isn't tracked. 4030 did_free |= free_unused_jobs_contents(copyID, COPYID_MASK); 4031 4032 // Go through the list of channels and free items without the copyID. 4033 did_free |= free_unused_channels_contents(copyID, COPYID_MASK); 4034 #endif 4035 4036 /* 4037 * PASS 2: free the items themselves. 4038 */ 4039 dict_free_items(copyID); 4040 list_free_items(copyID); 4041 4042 #ifdef FEAT_JOB_CHANNEL 4043 // Go through the list of jobs and free items without the copyID. This 4044 // must happen before doing channels, because jobs refer to channels, but 4045 // the reference from the channel to the job isn't tracked. 4046 free_unused_jobs(copyID, COPYID_MASK); 4047 4048 // Go through the list of channels and free items without the copyID. 4049 free_unused_channels(copyID, COPYID_MASK); 4050 #endif 4051 4052 in_free_unref_items = FALSE; 4053 4054 return did_free; 4055 } 4056 4057 /* 4058 * Mark all lists and dicts referenced through hashtab "ht" with "copyID". 4059 * "list_stack" is used to add lists to be marked. Can be NULL. 4060 * 4061 * Returns TRUE if setting references failed somehow. 4062 */ 4063 int 4064 set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack) 4065 { 4066 int todo; 4067 int abort = FALSE; 4068 hashitem_T *hi; 4069 hashtab_T *cur_ht; 4070 ht_stack_T *ht_stack = NULL; 4071 ht_stack_T *tempitem; 4072 4073 cur_ht = ht; 4074 for (;;) 4075 { 4076 if (!abort) 4077 { 4078 // Mark each item in the hashtab. If the item contains a hashtab 4079 // it is added to ht_stack, if it contains a list it is added to 4080 // list_stack. 4081 todo = (int)cur_ht->ht_used; 4082 for (hi = cur_ht->ht_array; todo > 0; ++hi) 4083 if (!HASHITEM_EMPTY(hi)) 4084 { 4085 --todo; 4086 abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID, 4087 &ht_stack, list_stack); 4088 } 4089 } 4090 4091 if (ht_stack == NULL) 4092 break; 4093 4094 // take an item from the stack 4095 cur_ht = ht_stack->ht; 4096 tempitem = ht_stack; 4097 ht_stack = ht_stack->prev; 4098 free(tempitem); 4099 } 4100 4101 return abort; 4102 } 4103 4104 /* 4105 * Mark a dict and its items with "copyID". 4106 * Returns TRUE if setting references failed somehow. 4107 */ 4108 int 4109 set_ref_in_dict(dict_T *d, int copyID) 4110 { 4111 if (d != NULL && d->dv_copyID != copyID) 4112 { 4113 d->dv_copyID = copyID; 4114 return set_ref_in_ht(&d->dv_hashtab, copyID, NULL); 4115 } 4116 return FALSE; 4117 } 4118 4119 /* 4120 * Mark a list and its items with "copyID". 4121 * Returns TRUE if setting references failed somehow. 4122 */ 4123 int 4124 set_ref_in_list(list_T *ll, int copyID) 4125 { 4126 if (ll != NULL && ll->lv_copyID != copyID) 4127 { 4128 ll->lv_copyID = copyID; 4129 return set_ref_in_list_items(ll, copyID, NULL); 4130 } 4131 return FALSE; 4132 } 4133 4134 /* 4135 * Mark all lists and dicts referenced through list "l" with "copyID". 4136 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4137 * 4138 * Returns TRUE if setting references failed somehow. 4139 */ 4140 int 4141 set_ref_in_list_items(list_T *l, int copyID, ht_stack_T **ht_stack) 4142 { 4143 listitem_T *li; 4144 int abort = FALSE; 4145 list_T *cur_l; 4146 list_stack_T *list_stack = NULL; 4147 list_stack_T *tempitem; 4148 4149 cur_l = l; 4150 for (;;) 4151 { 4152 if (!abort) 4153 // Mark each item in the list. If the item contains a hashtab 4154 // it is added to ht_stack, if it contains a list it is added to 4155 // list_stack. 4156 for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next) 4157 abort = abort || set_ref_in_item(&li->li_tv, copyID, 4158 ht_stack, &list_stack); 4159 if (list_stack == NULL) 4160 break; 4161 4162 // take an item from the stack 4163 cur_l = list_stack->list; 4164 tempitem = list_stack; 4165 list_stack = list_stack->prev; 4166 free(tempitem); 4167 } 4168 4169 return abort; 4170 } 4171 4172 /* 4173 * Mark all lists and dicts referenced through typval "tv" with "copyID". 4174 * "list_stack" is used to add lists to be marked. Can be NULL. 4175 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4176 * 4177 * Returns TRUE if setting references failed somehow. 4178 */ 4179 int 4180 set_ref_in_item( 4181 typval_T *tv, 4182 int copyID, 4183 ht_stack_T **ht_stack, 4184 list_stack_T **list_stack) 4185 { 4186 int abort = FALSE; 4187 4188 if (tv->v_type == VAR_DICT) 4189 { 4190 dict_T *dd = tv->vval.v_dict; 4191 4192 if (dd != NULL && dd->dv_copyID != copyID) 4193 { 4194 // Didn't see this dict yet. 4195 dd->dv_copyID = copyID; 4196 if (ht_stack == NULL) 4197 { 4198 abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack); 4199 } 4200 else 4201 { 4202 ht_stack_T *newitem = (ht_stack_T*)malloc(sizeof(ht_stack_T)); 4203 if (newitem == NULL) 4204 abort = TRUE; 4205 else 4206 { 4207 newitem->ht = &dd->dv_hashtab; 4208 newitem->prev = *ht_stack; 4209 *ht_stack = newitem; 4210 } 4211 } 4212 } 4213 } 4214 else if (tv->v_type == VAR_LIST) 4215 { 4216 list_T *ll = tv->vval.v_list; 4217 4218 if (ll != NULL && ll->lv_copyID != copyID) 4219 { 4220 // Didn't see this list yet. 4221 ll->lv_copyID = copyID; 4222 if (list_stack == NULL) 4223 { 4224 abort = set_ref_in_list_items(ll, copyID, ht_stack); 4225 } 4226 else 4227 { 4228 list_stack_T *newitem = (list_stack_T*)malloc( 4229 sizeof(list_stack_T)); 4230 if (newitem == NULL) 4231 abort = TRUE; 4232 else 4233 { 4234 newitem->list = ll; 4235 newitem->prev = *list_stack; 4236 *list_stack = newitem; 4237 } 4238 } 4239 } 4240 } 4241 else if (tv->v_type == VAR_FUNC) 4242 { 4243 abort = set_ref_in_func(tv->vval.v_string, NULL, copyID); 4244 } 4245 else if (tv->v_type == VAR_PARTIAL) 4246 { 4247 partial_T *pt = tv->vval.v_partial; 4248 int i; 4249 4250 // A partial does not have a copyID, because it cannot contain itself. 4251 if (pt != NULL) 4252 { 4253 abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID); 4254 4255 if (pt->pt_dict != NULL) 4256 { 4257 typval_T dtv; 4258 4259 dtv.v_type = VAR_DICT; 4260 dtv.vval.v_dict = pt->pt_dict; 4261 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4262 } 4263 4264 for (i = 0; i < pt->pt_argc; ++i) 4265 abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID, 4266 ht_stack, list_stack); 4267 } 4268 } 4269 #ifdef FEAT_JOB_CHANNEL 4270 else if (tv->v_type == VAR_JOB) 4271 { 4272 job_T *job = tv->vval.v_job; 4273 typval_T dtv; 4274 4275 if (job != NULL && job->jv_copyID != copyID) 4276 { 4277 job->jv_copyID = copyID; 4278 if (job->jv_channel != NULL) 4279 { 4280 dtv.v_type = VAR_CHANNEL; 4281 dtv.vval.v_channel = job->jv_channel; 4282 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4283 } 4284 if (job->jv_exit_cb.cb_partial != NULL) 4285 { 4286 dtv.v_type = VAR_PARTIAL; 4287 dtv.vval.v_partial = job->jv_exit_cb.cb_partial; 4288 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4289 } 4290 } 4291 } 4292 else if (tv->v_type == VAR_CHANNEL) 4293 { 4294 channel_T *ch =tv->vval.v_channel; 4295 ch_part_T part; 4296 typval_T dtv; 4297 jsonq_T *jq; 4298 cbq_T *cq; 4299 4300 if (ch != NULL && ch->ch_copyID != copyID) 4301 { 4302 ch->ch_copyID = copyID; 4303 for (part = PART_SOCK; part < PART_COUNT; ++part) 4304 { 4305 for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL; 4306 jq = jq->jq_next) 4307 set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack); 4308 for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL; 4309 cq = cq->cq_next) 4310 if (cq->cq_callback.cb_partial != NULL) 4311 { 4312 dtv.v_type = VAR_PARTIAL; 4313 dtv.vval.v_partial = cq->cq_callback.cb_partial; 4314 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4315 } 4316 if (ch->ch_part[part].ch_callback.cb_partial != NULL) 4317 { 4318 dtv.v_type = VAR_PARTIAL; 4319 dtv.vval.v_partial = 4320 ch->ch_part[part].ch_callback.cb_partial; 4321 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4322 } 4323 } 4324 if (ch->ch_callback.cb_partial != NULL) 4325 { 4326 dtv.v_type = VAR_PARTIAL; 4327 dtv.vval.v_partial = ch->ch_callback.cb_partial; 4328 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4329 } 4330 if (ch->ch_close_cb.cb_partial != NULL) 4331 { 4332 dtv.v_type = VAR_PARTIAL; 4333 dtv.vval.v_partial = ch->ch_close_cb.cb_partial; 4334 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4335 } 4336 } 4337 } 4338 #endif 4339 return abort; 4340 } 4341 4342 /* 4343 * Return a string with the string representation of a variable. 4344 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4345 * "numbuf" is used for a number. 4346 * When "copyID" is not NULL replace recursive lists and dicts with "...". 4347 * When both "echo_style" and "composite_val" are FALSE, put quotes around 4348 * stings as "string()", otherwise does not put quotes around strings, as 4349 * ":echo" displays values. 4350 * When "restore_copyID" is FALSE, repeated items in dictionaries and lists 4351 * are replaced with "...". 4352 * May return NULL. 4353 */ 4354 char_u * 4355 echo_string_core( 4356 typval_T *tv, 4357 char_u **tofree, 4358 char_u *numbuf, 4359 int copyID, 4360 int echo_style, 4361 int restore_copyID, 4362 int composite_val) 4363 { 4364 static int recurse = 0; 4365 char_u *r = NULL; 4366 4367 if (recurse >= DICT_MAXNEST) 4368 { 4369 if (!did_echo_string_emsg) 4370 { 4371 // Only give this message once for a recursive call to avoid 4372 // flooding the user with errors. And stop iterating over lists 4373 // and dicts. 4374 did_echo_string_emsg = TRUE; 4375 emsg(_("E724: variable nested too deep for displaying")); 4376 } 4377 *tofree = NULL; 4378 return (char_u *)"{E724}"; 4379 } 4380 ++recurse; 4381 4382 switch (tv->v_type) 4383 { 4384 case VAR_STRING: 4385 if (echo_style && !composite_val) 4386 { 4387 *tofree = NULL; 4388 r = tv->vval.v_string; 4389 if (r == NULL) 4390 r = (char_u *)""; 4391 } 4392 else 4393 { 4394 *tofree = string_quote(tv->vval.v_string, FALSE); 4395 r = *tofree; 4396 } 4397 break; 4398 4399 case VAR_FUNC: 4400 if (echo_style) 4401 { 4402 *tofree = NULL; 4403 r = tv->vval.v_string; 4404 } 4405 else 4406 { 4407 *tofree = string_quote(tv->vval.v_string, TRUE); 4408 r = *tofree; 4409 } 4410 break; 4411 4412 case VAR_PARTIAL: 4413 { 4414 partial_T *pt = tv->vval.v_partial; 4415 char_u *fname = string_quote(pt == NULL ? NULL 4416 : partial_name(pt), FALSE); 4417 garray_T ga; 4418 int i; 4419 char_u *tf; 4420 4421 ga_init2(&ga, 1, 100); 4422 ga_concat(&ga, (char_u *)"function("); 4423 if (fname != NULL) 4424 { 4425 ga_concat(&ga, fname); 4426 vim_free(fname); 4427 } 4428 if (pt != NULL && pt->pt_argc > 0) 4429 { 4430 ga_concat(&ga, (char_u *)", ["); 4431 for (i = 0; i < pt->pt_argc; ++i) 4432 { 4433 if (i > 0) 4434 ga_concat(&ga, (char_u *)", "); 4435 ga_concat(&ga, 4436 tv2string(&pt->pt_argv[i], &tf, numbuf, copyID)); 4437 vim_free(tf); 4438 } 4439 ga_concat(&ga, (char_u *)"]"); 4440 } 4441 if (pt != NULL && pt->pt_dict != NULL) 4442 { 4443 typval_T dtv; 4444 4445 ga_concat(&ga, (char_u *)", "); 4446 dtv.v_type = VAR_DICT; 4447 dtv.vval.v_dict = pt->pt_dict; 4448 ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID)); 4449 vim_free(tf); 4450 } 4451 ga_concat(&ga, (char_u *)")"); 4452 4453 *tofree = ga.ga_data; 4454 r = *tofree; 4455 break; 4456 } 4457 4458 case VAR_BLOB: 4459 r = blob2string(tv->vval.v_blob, tofree, numbuf); 4460 break; 4461 4462 case VAR_LIST: 4463 if (tv->vval.v_list == NULL) 4464 { 4465 *tofree = NULL; 4466 r = NULL; 4467 } 4468 else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID 4469 && tv->vval.v_list->lv_len > 0) 4470 { 4471 *tofree = NULL; 4472 r = (char_u *)"[...]"; 4473 } 4474 else 4475 { 4476 int old_copyID = tv->vval.v_list->lv_copyID; 4477 4478 tv->vval.v_list->lv_copyID = copyID; 4479 *tofree = list2string(tv, copyID, restore_copyID); 4480 if (restore_copyID) 4481 tv->vval.v_list->lv_copyID = old_copyID; 4482 r = *tofree; 4483 } 4484 break; 4485 4486 case VAR_DICT: 4487 if (tv->vval.v_dict == NULL) 4488 { 4489 *tofree = NULL; 4490 r = NULL; 4491 } 4492 else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID 4493 && tv->vval.v_dict->dv_hashtab.ht_used != 0) 4494 { 4495 *tofree = NULL; 4496 r = (char_u *)"{...}"; 4497 } 4498 else 4499 { 4500 int old_copyID = tv->vval.v_dict->dv_copyID; 4501 tv->vval.v_dict->dv_copyID = copyID; 4502 *tofree = dict2string(tv, copyID, restore_copyID); 4503 if (restore_copyID) 4504 tv->vval.v_dict->dv_copyID = old_copyID; 4505 r = *tofree; 4506 } 4507 break; 4508 4509 case VAR_NUMBER: 4510 case VAR_UNKNOWN: 4511 *tofree = NULL; 4512 r = tv_get_string_buf(tv, numbuf); 4513 break; 4514 4515 case VAR_JOB: 4516 case VAR_CHANNEL: 4517 *tofree = NULL; 4518 r = tv_get_string_buf(tv, numbuf); 4519 if (composite_val) 4520 { 4521 *tofree = string_quote(r, FALSE); 4522 r = *tofree; 4523 } 4524 break; 4525 4526 case VAR_FLOAT: 4527 #ifdef FEAT_FLOAT 4528 *tofree = NULL; 4529 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float); 4530 r = numbuf; 4531 break; 4532 #endif 4533 4534 case VAR_SPECIAL: 4535 *tofree = NULL; 4536 r = (char_u *)get_var_special_name(tv->vval.v_number); 4537 break; 4538 } 4539 4540 if (--recurse == 0) 4541 did_echo_string_emsg = FALSE; 4542 return r; 4543 } 4544 4545 /* 4546 * Return a string with the string representation of a variable. 4547 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4548 * "numbuf" is used for a number. 4549 * Does not put quotes around strings, as ":echo" displays values. 4550 * When "copyID" is not NULL replace recursive lists and dicts with "...". 4551 * May return NULL. 4552 */ 4553 char_u * 4554 echo_string( 4555 typval_T *tv, 4556 char_u **tofree, 4557 char_u *numbuf, 4558 int copyID) 4559 { 4560 return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE); 4561 } 4562 4563 /* 4564 * Return a string with the string representation of a variable. 4565 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4566 * "numbuf" is used for a number. 4567 * Puts quotes around strings, so that they can be parsed back by eval(). 4568 * May return NULL. 4569 */ 4570 char_u * 4571 tv2string( 4572 typval_T *tv, 4573 char_u **tofree, 4574 char_u *numbuf, 4575 int copyID) 4576 { 4577 return echo_string_core(tv, tofree, numbuf, copyID, FALSE, TRUE, FALSE); 4578 } 4579 4580 /* 4581 * Return string "str" in ' quotes, doubling ' characters. 4582 * If "str" is NULL an empty string is assumed. 4583 * If "function" is TRUE make it function('string'). 4584 */ 4585 char_u * 4586 string_quote(char_u *str, int function) 4587 { 4588 unsigned len; 4589 char_u *p, *r, *s; 4590 4591 len = (function ? 13 : 3); 4592 if (str != NULL) 4593 { 4594 len += (unsigned)STRLEN(str); 4595 for (p = str; *p != NUL; MB_PTR_ADV(p)) 4596 if (*p == '\'') 4597 ++len; 4598 } 4599 s = r = alloc(len); 4600 if (r != NULL) 4601 { 4602 if (function) 4603 { 4604 STRCPY(r, "function('"); 4605 r += 10; 4606 } 4607 else 4608 *r++ = '\''; 4609 if (str != NULL) 4610 for (p = str; *p != NUL; ) 4611 { 4612 if (*p == '\'') 4613 *r++ = '\''; 4614 MB_COPY_CHAR(p, r); 4615 } 4616 *r++ = '\''; 4617 if (function) 4618 *r++ = ')'; 4619 *r++ = NUL; 4620 } 4621 return s; 4622 } 4623 4624 #if defined(FEAT_FLOAT) || defined(PROTO) 4625 /* 4626 * Convert the string "text" to a floating point number. 4627 * This uses strtod(). setlocale(LC_NUMERIC, "C") has been used to make sure 4628 * this always uses a decimal point. 4629 * Returns the length of the text that was consumed. 4630 */ 4631 int 4632 string2float( 4633 char_u *text, 4634 float_T *value) // result stored here 4635 { 4636 char *s = (char *)text; 4637 float_T f; 4638 4639 // MS-Windows does not deal with "inf" and "nan" properly. 4640 if (STRNICMP(text, "inf", 3) == 0) 4641 { 4642 *value = INFINITY; 4643 return 3; 4644 } 4645 if (STRNICMP(text, "-inf", 3) == 0) 4646 { 4647 *value = -INFINITY; 4648 return 4; 4649 } 4650 if (STRNICMP(text, "nan", 3) == 0) 4651 { 4652 *value = NAN; 4653 return 3; 4654 } 4655 f = strtod(s, &s); 4656 *value = f; 4657 return (int)((char_u *)s - text); 4658 } 4659 #endif 4660 4661 /* 4662 * Get the value of an environment variable. 4663 * "arg" is pointing to the '$'. It is advanced to after the name. 4664 * If the environment variable was not set, silently assume it is empty. 4665 * Return FAIL if the name is invalid. 4666 */ 4667 static int 4668 get_env_tv(char_u **arg, typval_T *rettv, int evaluate) 4669 { 4670 char_u *string = NULL; 4671 int len; 4672 int cc; 4673 char_u *name; 4674 int mustfree = FALSE; 4675 4676 ++*arg; 4677 name = *arg; 4678 len = get_env_len(arg); 4679 if (evaluate) 4680 { 4681 if (len == 0) 4682 return FAIL; // invalid empty name 4683 4684 cc = name[len]; 4685 name[len] = NUL; 4686 // first try vim_getenv(), fast for normal environment vars 4687 string = vim_getenv(name, &mustfree); 4688 if (string != NULL && *string != NUL) 4689 { 4690 if (!mustfree) 4691 string = vim_strsave(string); 4692 } 4693 else 4694 { 4695 if (mustfree) 4696 vim_free(string); 4697 4698 // next try expanding things like $VIM and ${HOME} 4699 string = expand_env_save(name - 1); 4700 if (string != NULL && *string == '$') 4701 VIM_CLEAR(string); 4702 } 4703 name[len] = cc; 4704 4705 rettv->v_type = VAR_STRING; 4706 rettv->vval.v_string = string; 4707 } 4708 4709 return OK; 4710 } 4711 4712 /* 4713 * Translate a String variable into a position. 4714 * Returns NULL when there is an error. 4715 */ 4716 pos_T * 4717 var2fpos( 4718 typval_T *varp, 4719 int dollar_lnum, // TRUE when $ is last line 4720 int *fnum) // set to fnum for '0, 'A, etc. 4721 { 4722 char_u *name; 4723 static pos_T pos; 4724 pos_T *pp; 4725 4726 // Argument can be [lnum, col, coladd]. 4727 if (varp->v_type == VAR_LIST) 4728 { 4729 list_T *l; 4730 int len; 4731 int error = FALSE; 4732 listitem_T *li; 4733 4734 l = varp->vval.v_list; 4735 if (l == NULL) 4736 return NULL; 4737 4738 // Get the line number 4739 pos.lnum = list_find_nr(l, 0L, &error); 4740 if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count) 4741 return NULL; // invalid line number 4742 4743 // Get the column number 4744 pos.col = list_find_nr(l, 1L, &error); 4745 if (error) 4746 return NULL; 4747 len = (long)STRLEN(ml_get(pos.lnum)); 4748 4749 // We accept "$" for the column number: last column. 4750 li = list_find(l, 1L); 4751 if (li != NULL && li->li_tv.v_type == VAR_STRING 4752 && li->li_tv.vval.v_string != NULL 4753 && STRCMP(li->li_tv.vval.v_string, "$") == 0) 4754 pos.col = len + 1; 4755 4756 // Accept a position up to the NUL after the line. 4757 if (pos.col == 0 || (int)pos.col > len + 1) 4758 return NULL; // invalid column number 4759 --pos.col; 4760 4761 // Get the virtual offset. Defaults to zero. 4762 pos.coladd = list_find_nr(l, 2L, &error); 4763 if (error) 4764 pos.coladd = 0; 4765 4766 return &pos; 4767 } 4768 4769 name = tv_get_string_chk(varp); 4770 if (name == NULL) 4771 return NULL; 4772 if (name[0] == '.') // cursor 4773 return &curwin->w_cursor; 4774 if (name[0] == 'v' && name[1] == NUL) // Visual start 4775 { 4776 if (VIsual_active) 4777 return &VIsual; 4778 return &curwin->w_cursor; 4779 } 4780 if (name[0] == '\'') // mark 4781 { 4782 pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum); 4783 if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0) 4784 return NULL; 4785 return pp; 4786 } 4787 4788 pos.coladd = 0; 4789 4790 if (name[0] == 'w' && dollar_lnum) 4791 { 4792 pos.col = 0; 4793 if (name[1] == '0') // "w0": first visible line 4794 { 4795 update_topline(); 4796 // In silent Ex mode topline is zero, but that's not a valid line 4797 // number; use one instead. 4798 pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1; 4799 return &pos; 4800 } 4801 else if (name[1] == '$') // "w$": last visible line 4802 { 4803 validate_botline(); 4804 // In silent Ex mode botline is zero, return zero then. 4805 pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0; 4806 return &pos; 4807 } 4808 } 4809 else if (name[0] == '$') // last column or line 4810 { 4811 if (dollar_lnum) 4812 { 4813 pos.lnum = curbuf->b_ml.ml_line_count; 4814 pos.col = 0; 4815 } 4816 else 4817 { 4818 pos.lnum = curwin->w_cursor.lnum; 4819 pos.col = (colnr_T)STRLEN(ml_get_curline()); 4820 } 4821 return &pos; 4822 } 4823 return NULL; 4824 } 4825 4826 /* 4827 * Convert list in "arg" into a position and optional file number. 4828 * When "fnump" is NULL there is no file number, only 3 items. 4829 * Note that the column is passed on as-is, the caller may want to decrement 4830 * it to use 1 for the first column. 4831 * Return FAIL when conversion is not possible, doesn't check the position for 4832 * validity. 4833 */ 4834 int 4835 list2fpos( 4836 typval_T *arg, 4837 pos_T *posp, 4838 int *fnump, 4839 colnr_T *curswantp) 4840 { 4841 list_T *l = arg->vval.v_list; 4842 long i = 0; 4843 long n; 4844 4845 // List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only 4846 // there when "fnump" isn't NULL; "coladd" and "curswant" are optional. 4847 if (arg->v_type != VAR_LIST 4848 || l == NULL 4849 || l->lv_len < (fnump == NULL ? 2 : 3) 4850 || l->lv_len > (fnump == NULL ? 4 : 5)) 4851 return FAIL; 4852 4853 if (fnump != NULL) 4854 { 4855 n = list_find_nr(l, i++, NULL); // fnum 4856 if (n < 0) 4857 return FAIL; 4858 if (n == 0) 4859 n = curbuf->b_fnum; // current buffer 4860 *fnump = n; 4861 } 4862 4863 n = list_find_nr(l, i++, NULL); // lnum 4864 if (n < 0) 4865 return FAIL; 4866 posp->lnum = n; 4867 4868 n = list_find_nr(l, i++, NULL); // col 4869 if (n < 0) 4870 return FAIL; 4871 posp->col = n; 4872 4873 n = list_find_nr(l, i, NULL); // off 4874 if (n < 0) 4875 posp->coladd = 0; 4876 else 4877 posp->coladd = n; 4878 4879 if (curswantp != NULL) 4880 *curswantp = list_find_nr(l, i + 1, NULL); // curswant 4881 4882 return OK; 4883 } 4884 4885 /* 4886 * Get the length of an environment variable name. 4887 * Advance "arg" to the first character after the name. 4888 * Return 0 for error. 4889 */ 4890 int 4891 get_env_len(char_u **arg) 4892 { 4893 char_u *p; 4894 int len; 4895 4896 for (p = *arg; vim_isIDc(*p); ++p) 4897 ; 4898 if (p == *arg) // no name found 4899 return 0; 4900 4901 len = (int)(p - *arg); 4902 *arg = p; 4903 return len; 4904 } 4905 4906 /* 4907 * Get the length of the name of a function or internal variable. 4908 * "arg" is advanced to the first non-white character after the name. 4909 * Return 0 if something is wrong. 4910 */ 4911 int 4912 get_id_len(char_u **arg) 4913 { 4914 char_u *p; 4915 int len; 4916 4917 // Find the end of the name. 4918 for (p = *arg; eval_isnamec(*p); ++p) 4919 { 4920 if (*p == ':') 4921 { 4922 // "s:" is start of "s:var", but "n:" is not and can be used in 4923 // slice "[n:]". Also "xx:" is not a namespace. 4924 len = (int)(p - *arg); 4925 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL) 4926 || len > 1) 4927 break; 4928 } 4929 } 4930 if (p == *arg) // no name found 4931 return 0; 4932 4933 len = (int)(p - *arg); 4934 *arg = skipwhite(p); 4935 4936 return len; 4937 } 4938 4939 /* 4940 * Get the length of the name of a variable or function. 4941 * Only the name is recognized, does not handle ".key" or "[idx]". 4942 * "arg" is advanced to the first non-white character after the name. 4943 * Return -1 if curly braces expansion failed. 4944 * Return 0 if something else is wrong. 4945 * If the name contains 'magic' {}'s, expand them and return the 4946 * expanded name in an allocated string via 'alias' - caller must free. 4947 */ 4948 int 4949 get_name_len( 4950 char_u **arg, 4951 char_u **alias, 4952 int evaluate, 4953 int verbose) 4954 { 4955 int len; 4956 char_u *p; 4957 char_u *expr_start; 4958 char_u *expr_end; 4959 4960 *alias = NULL; // default to no alias 4961 4962 if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA 4963 && (*arg)[2] == (int)KE_SNR) 4964 { 4965 // hard coded <SNR>, already translated 4966 *arg += 3; 4967 return get_id_len(arg) + 3; 4968 } 4969 len = eval_fname_script(*arg); 4970 if (len > 0) 4971 { 4972 // literal "<SID>", "s:" or "<SNR>" 4973 *arg += len; 4974 } 4975 4976 /* 4977 * Find the end of the name; check for {} construction. 4978 */ 4979 p = find_name_end(*arg, &expr_start, &expr_end, 4980 len > 0 ? 0 : FNE_CHECK_START); 4981 if (expr_start != NULL) 4982 { 4983 char_u *temp_string; 4984 4985 if (!evaluate) 4986 { 4987 len += (int)(p - *arg); 4988 *arg = skipwhite(p); 4989 return len; 4990 } 4991 4992 /* 4993 * Include any <SID> etc in the expanded string: 4994 * Thus the -len here. 4995 */ 4996 temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p); 4997 if (temp_string == NULL) 4998 return -1; 4999 *alias = temp_string; 5000 *arg = skipwhite(p); 5001 return (int)STRLEN(temp_string); 5002 } 5003 5004 len += get_id_len(arg); 5005 // Only give an error when there is something, otherwise it will be 5006 // reported at a higher level. 5007 if (len == 0 && verbose && **arg != NUL) 5008 semsg(_(e_invexpr2), *arg); 5009 5010 return len; 5011 } 5012 5013 /* 5014 * Find the end of a variable or function name, taking care of magic braces. 5015 * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the 5016 * start and end of the first magic braces item. 5017 * "flags" can have FNE_INCL_BR and FNE_CHECK_START. 5018 * Return a pointer to just after the name. Equal to "arg" if there is no 5019 * valid name. 5020 */ 5021 char_u * 5022 find_name_end( 5023 char_u *arg, 5024 char_u **expr_start, 5025 char_u **expr_end, 5026 int flags) 5027 { 5028 int mb_nest = 0; 5029 int br_nest = 0; 5030 char_u *p; 5031 int len; 5032 5033 if (expr_start != NULL) 5034 { 5035 *expr_start = NULL; 5036 *expr_end = NULL; 5037 } 5038 5039 // Quick check for valid starting character. 5040 if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{') 5041 return arg; 5042 5043 for (p = arg; *p != NUL 5044 && (eval_isnamec(*p) 5045 || *p == '{' 5046 || ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.')) 5047 || mb_nest != 0 5048 || br_nest != 0); MB_PTR_ADV(p)) 5049 { 5050 if (*p == '\'') 5051 { 5052 // skip over 'string' to avoid counting [ and ] inside it. 5053 for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p)) 5054 ; 5055 if (*p == NUL) 5056 break; 5057 } 5058 else if (*p == '"') 5059 { 5060 // skip over "str\"ing" to avoid counting [ and ] inside it. 5061 for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p)) 5062 if (*p == '\\' && p[1] != NUL) 5063 ++p; 5064 if (*p == NUL) 5065 break; 5066 } 5067 else if (br_nest == 0 && mb_nest == 0 && *p == ':') 5068 { 5069 // "s:" is start of "s:var", but "n:" is not and can be used in 5070 // slice "[n:]". Also "xx:" is not a namespace. But {ns}: is. 5071 len = (int)(p - arg); 5072 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL) 5073 || (len > 1 && p[-1] != '}')) 5074 break; 5075 } 5076 5077 if (mb_nest == 0) 5078 { 5079 if (*p == '[') 5080 ++br_nest; 5081 else if (*p == ']') 5082 --br_nest; 5083 } 5084 5085 if (br_nest == 0) 5086 { 5087 if (*p == '{') 5088 { 5089 mb_nest++; 5090 if (expr_start != NULL && *expr_start == NULL) 5091 *expr_start = p; 5092 } 5093 else if (*p == '}') 5094 { 5095 mb_nest--; 5096 if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL) 5097 *expr_end = p; 5098 } 5099 } 5100 } 5101 5102 return p; 5103 } 5104 5105 /* 5106 * Expands out the 'magic' {}'s in a variable/function name. 5107 * Note that this can call itself recursively, to deal with 5108 * constructs like foo{bar}{baz}{bam} 5109 * The four pointer arguments point to "foo{expre}ss{ion}bar" 5110 * "in_start" ^ 5111 * "expr_start" ^ 5112 * "expr_end" ^ 5113 * "in_end" ^ 5114 * 5115 * Returns a new allocated string, which the caller must free. 5116 * Returns NULL for failure. 5117 */ 5118 static char_u * 5119 make_expanded_name( 5120 char_u *in_start, 5121 char_u *expr_start, 5122 char_u *expr_end, 5123 char_u *in_end) 5124 { 5125 char_u c1; 5126 char_u *retval = NULL; 5127 char_u *temp_result; 5128 char_u *nextcmd = NULL; 5129 5130 if (expr_end == NULL || in_end == NULL) 5131 return NULL; 5132 *expr_start = NUL; 5133 *expr_end = NUL; 5134 c1 = *in_end; 5135 *in_end = NUL; 5136 5137 temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE); 5138 if (temp_result != NULL && nextcmd == NULL) 5139 { 5140 retval = alloc(STRLEN(temp_result) + (expr_start - in_start) 5141 + (in_end - expr_end) + 1); 5142 if (retval != NULL) 5143 { 5144 STRCPY(retval, in_start); 5145 STRCAT(retval, temp_result); 5146 STRCAT(retval, expr_end + 1); 5147 } 5148 } 5149 vim_free(temp_result); 5150 5151 *in_end = c1; // put char back for error messages 5152 *expr_start = '{'; 5153 *expr_end = '}'; 5154 5155 if (retval != NULL) 5156 { 5157 temp_result = find_name_end(retval, &expr_start, &expr_end, 0); 5158 if (expr_start != NULL) 5159 { 5160 // Further expansion! 5161 temp_result = make_expanded_name(retval, expr_start, 5162 expr_end, temp_result); 5163 vim_free(retval); 5164 retval = temp_result; 5165 } 5166 } 5167 5168 return retval; 5169 } 5170 5171 /* 5172 * Return TRUE if character "c" can be used in a variable or function name. 5173 * Does not include '{' or '}' for magic braces. 5174 */ 5175 int 5176 eval_isnamec(int c) 5177 { 5178 return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR); 5179 } 5180 5181 /* 5182 * Return TRUE if character "c" can be used as the first character in a 5183 * variable or function name (excluding '{' and '}'). 5184 */ 5185 int 5186 eval_isnamec1(int c) 5187 { 5188 return (ASCII_ISALPHA(c) || c == '_'); 5189 } 5190 5191 /* 5192 * Handle: 5193 * - expr[expr], expr[expr:expr] subscript 5194 * - ".name" lookup 5195 * - function call with Funcref variable: func(expr) 5196 * - method call: var->method() 5197 * 5198 * Can all be combined in any order: dict.func(expr)[idx]['func'](expr)->len() 5199 */ 5200 int 5201 handle_subscript( 5202 char_u **arg, 5203 typval_T *rettv, 5204 int evaluate, // do more than finding the end 5205 int verbose, // give error messages 5206 char_u *start_leader, // start of '!' and '-' prefixes 5207 char_u **end_leaderp) // end of '!' and '-' prefixes 5208 { 5209 int ret = OK; 5210 dict_T *selfdict = NULL; 5211 5212 // "." is ".name" lookup when we found a dict or when evaluating and 5213 // scriptversion is at least 2, where string concatenation is "..". 5214 while (ret == OK 5215 && (((**arg == '[' 5216 || (**arg == '.' && (rettv->v_type == VAR_DICT 5217 || (!evaluate 5218 && (*arg)[1] != '.' 5219 && current_sctx.sc_version >= 2))) 5220 || (**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC 5221 || rettv->v_type == VAR_PARTIAL))) 5222 && !VIM_ISWHITE(*(*arg - 1))) 5223 || (**arg == '-' && (*arg)[1] == '>'))) 5224 { 5225 if (**arg == '(') 5226 { 5227 ret = call_func_rettv(arg, rettv, evaluate, selfdict, NULL); 5228 5229 // Stop the expression evaluation when immediately aborting on 5230 // error, or when an interrupt occurred or an exception was thrown 5231 // but not caught. 5232 if (aborting()) 5233 { 5234 if (ret == OK) 5235 clear_tv(rettv); 5236 ret = FAIL; 5237 } 5238 dict_unref(selfdict); 5239 selfdict = NULL; 5240 } 5241 else if (**arg == '-') 5242 { 5243 // Expression "-1.0->method()" applies the leader "-" before 5244 // applying ->. 5245 if (evaluate && *end_leaderp > start_leader) 5246 ret = eval7_leader(rettv, start_leader, end_leaderp); 5247 if (ret == OK) 5248 { 5249 if ((*arg)[2] == '{') 5250 // expr->{lambda}() 5251 ret = eval_lambda(arg, rettv, evaluate, verbose); 5252 else 5253 // expr->name() 5254 ret = eval_method(arg, rettv, evaluate, verbose); 5255 } 5256 } 5257 else // **arg == '[' || **arg == '.' 5258 { 5259 dict_unref(selfdict); 5260 if (rettv->v_type == VAR_DICT) 5261 { 5262 selfdict = rettv->vval.v_dict; 5263 if (selfdict != NULL) 5264 ++selfdict->dv_refcount; 5265 } 5266 else 5267 selfdict = NULL; 5268 if (eval_index(arg, rettv, evaluate, verbose) == FAIL) 5269 { 5270 clear_tv(rettv); 5271 ret = FAIL; 5272 } 5273 } 5274 } 5275 5276 // Turn "dict.Func" into a partial for "Func" bound to "dict". 5277 // Don't do this when "Func" is already a partial that was bound 5278 // explicitly (pt_auto is FALSE). 5279 if (selfdict != NULL 5280 && (rettv->v_type == VAR_FUNC 5281 || (rettv->v_type == VAR_PARTIAL 5282 && (rettv->vval.v_partial->pt_auto 5283 || rettv->vval.v_partial->pt_dict == NULL)))) 5284 selfdict = make_partial(selfdict, rettv); 5285 5286 dict_unref(selfdict); 5287 return ret; 5288 } 5289 5290 /* 5291 * Allocate memory for a variable type-value, and make it empty (0 or NULL 5292 * value). 5293 */ 5294 typval_T * 5295 alloc_tv(void) 5296 { 5297 return ALLOC_CLEAR_ONE(typval_T); 5298 } 5299 5300 /* 5301 * Allocate memory for a variable type-value, and assign a string to it. 5302 * The string "s" must have been allocated, it is consumed. 5303 * Return NULL for out of memory, the variable otherwise. 5304 */ 5305 typval_T * 5306 alloc_string_tv(char_u *s) 5307 { 5308 typval_T *rettv; 5309 5310 rettv = alloc_tv(); 5311 if (rettv != NULL) 5312 { 5313 rettv->v_type = VAR_STRING; 5314 rettv->vval.v_string = s; 5315 } 5316 else 5317 vim_free(s); 5318 return rettv; 5319 } 5320 5321 /* 5322 * Free the memory for a variable type-value. 5323 */ 5324 void 5325 free_tv(typval_T *varp) 5326 { 5327 if (varp != NULL) 5328 { 5329 switch (varp->v_type) 5330 { 5331 case VAR_FUNC: 5332 func_unref(varp->vval.v_string); 5333 // FALLTHROUGH 5334 case VAR_STRING: 5335 vim_free(varp->vval.v_string); 5336 break; 5337 case VAR_PARTIAL: 5338 partial_unref(varp->vval.v_partial); 5339 break; 5340 case VAR_BLOB: 5341 blob_unref(varp->vval.v_blob); 5342 break; 5343 case VAR_LIST: 5344 list_unref(varp->vval.v_list); 5345 break; 5346 case VAR_DICT: 5347 dict_unref(varp->vval.v_dict); 5348 break; 5349 case VAR_JOB: 5350 #ifdef FEAT_JOB_CHANNEL 5351 job_unref(varp->vval.v_job); 5352 break; 5353 #endif 5354 case VAR_CHANNEL: 5355 #ifdef FEAT_JOB_CHANNEL 5356 channel_unref(varp->vval.v_channel); 5357 break; 5358 #endif 5359 case VAR_NUMBER: 5360 case VAR_FLOAT: 5361 case VAR_UNKNOWN: 5362 case VAR_SPECIAL: 5363 break; 5364 } 5365 vim_free(varp); 5366 } 5367 } 5368 5369 /* 5370 * Free the memory for a variable value and set the value to NULL or 0. 5371 */ 5372 void 5373 clear_tv(typval_T *varp) 5374 { 5375 if (varp != NULL) 5376 { 5377 switch (varp->v_type) 5378 { 5379 case VAR_FUNC: 5380 func_unref(varp->vval.v_string); 5381 // FALLTHROUGH 5382 case VAR_STRING: 5383 VIM_CLEAR(varp->vval.v_string); 5384 break; 5385 case VAR_PARTIAL: 5386 partial_unref(varp->vval.v_partial); 5387 varp->vval.v_partial = NULL; 5388 break; 5389 case VAR_BLOB: 5390 blob_unref(varp->vval.v_blob); 5391 varp->vval.v_blob = NULL; 5392 break; 5393 case VAR_LIST: 5394 list_unref(varp->vval.v_list); 5395 varp->vval.v_list = NULL; 5396 break; 5397 case VAR_DICT: 5398 dict_unref(varp->vval.v_dict); 5399 varp->vval.v_dict = NULL; 5400 break; 5401 case VAR_NUMBER: 5402 case VAR_SPECIAL: 5403 varp->vval.v_number = 0; 5404 break; 5405 case VAR_FLOAT: 5406 #ifdef FEAT_FLOAT 5407 varp->vval.v_float = 0.0; 5408 break; 5409 #endif 5410 case VAR_JOB: 5411 #ifdef FEAT_JOB_CHANNEL 5412 job_unref(varp->vval.v_job); 5413 varp->vval.v_job = NULL; 5414 #endif 5415 break; 5416 case VAR_CHANNEL: 5417 #ifdef FEAT_JOB_CHANNEL 5418 channel_unref(varp->vval.v_channel); 5419 varp->vval.v_channel = NULL; 5420 #endif 5421 case VAR_UNKNOWN: 5422 break; 5423 } 5424 varp->v_lock = 0; 5425 } 5426 } 5427 5428 /* 5429 * Set the value of a variable to NULL without freeing items. 5430 */ 5431 void 5432 init_tv(typval_T *varp) 5433 { 5434 if (varp != NULL) 5435 vim_memset(varp, 0, sizeof(typval_T)); 5436 } 5437 5438 /* 5439 * Get the number value of a variable. 5440 * If it is a String variable, uses vim_str2nr(). 5441 * For incompatible types, return 0. 5442 * tv_get_number_chk() is similar to tv_get_number(), but informs the 5443 * caller of incompatible types: it sets *denote to TRUE if "denote" 5444 * is not NULL or returns -1 otherwise. 5445 */ 5446 varnumber_T 5447 tv_get_number(typval_T *varp) 5448 { 5449 int error = FALSE; 5450 5451 return tv_get_number_chk(varp, &error); // return 0L on error 5452 } 5453 5454 varnumber_T 5455 tv_get_number_chk(typval_T *varp, int *denote) 5456 { 5457 varnumber_T n = 0L; 5458 5459 switch (varp->v_type) 5460 { 5461 case VAR_NUMBER: 5462 return varp->vval.v_number; 5463 case VAR_FLOAT: 5464 #ifdef FEAT_FLOAT 5465 emsg(_("E805: Using a Float as a Number")); 5466 break; 5467 #endif 5468 case VAR_FUNC: 5469 case VAR_PARTIAL: 5470 emsg(_("E703: Using a Funcref as a Number")); 5471 break; 5472 case VAR_STRING: 5473 if (varp->vval.v_string != NULL) 5474 vim_str2nr(varp->vval.v_string, NULL, NULL, 5475 STR2NR_ALL, &n, NULL, 0, FALSE); 5476 return n; 5477 case VAR_LIST: 5478 emsg(_("E745: Using a List as a Number")); 5479 break; 5480 case VAR_DICT: 5481 emsg(_("E728: Using a Dictionary as a Number")); 5482 break; 5483 case VAR_SPECIAL: 5484 return varp->vval.v_number == VVAL_TRUE ? 1 : 0; 5485 case VAR_JOB: 5486 #ifdef FEAT_JOB_CHANNEL 5487 emsg(_("E910: Using a Job as a Number")); 5488 break; 5489 #endif 5490 case VAR_CHANNEL: 5491 #ifdef FEAT_JOB_CHANNEL 5492 emsg(_("E913: Using a Channel as a Number")); 5493 break; 5494 #endif 5495 case VAR_BLOB: 5496 emsg(_("E974: Using a Blob as a Number")); 5497 break; 5498 case VAR_UNKNOWN: 5499 internal_error("tv_get_number(UNKNOWN)"); 5500 break; 5501 } 5502 if (denote == NULL) // useful for values that must be unsigned 5503 n = -1; 5504 else 5505 *denote = TRUE; 5506 return n; 5507 } 5508 5509 #ifdef FEAT_FLOAT 5510 float_T 5511 tv_get_float(typval_T *varp) 5512 { 5513 switch (varp->v_type) 5514 { 5515 case VAR_NUMBER: 5516 return (float_T)(varp->vval.v_number); 5517 case VAR_FLOAT: 5518 return varp->vval.v_float; 5519 case VAR_FUNC: 5520 case VAR_PARTIAL: 5521 emsg(_("E891: Using a Funcref as a Float")); 5522 break; 5523 case VAR_STRING: 5524 emsg(_("E892: Using a String as a Float")); 5525 break; 5526 case VAR_LIST: 5527 emsg(_("E893: Using a List as a Float")); 5528 break; 5529 case VAR_DICT: 5530 emsg(_("E894: Using a Dictionary as a Float")); 5531 break; 5532 case VAR_SPECIAL: 5533 emsg(_("E907: Using a special value as a Float")); 5534 break; 5535 case VAR_JOB: 5536 # ifdef FEAT_JOB_CHANNEL 5537 emsg(_("E911: Using a Job as a Float")); 5538 break; 5539 # endif 5540 case VAR_CHANNEL: 5541 # ifdef FEAT_JOB_CHANNEL 5542 emsg(_("E914: Using a Channel as a Float")); 5543 break; 5544 # endif 5545 case VAR_BLOB: 5546 emsg(_("E975: Using a Blob as a Float")); 5547 break; 5548 case VAR_UNKNOWN: 5549 internal_error("tv_get_float(UNKNOWN)"); 5550 break; 5551 } 5552 return 0; 5553 } 5554 #endif 5555 5556 /* 5557 * Get the string value of a variable. 5558 * If it is a Number variable, the number is converted into a string. 5559 * tv_get_string() uses a single, static buffer. YOU CAN ONLY USE IT ONCE! 5560 * tv_get_string_buf() uses a given buffer. 5561 * If the String variable has never been set, return an empty string. 5562 * Never returns NULL; 5563 * tv_get_string_chk() and tv_get_string_buf_chk() are similar, but return 5564 * NULL on error. 5565 */ 5566 char_u * 5567 tv_get_string(typval_T *varp) 5568 { 5569 static char_u mybuf[NUMBUFLEN]; 5570 5571 return tv_get_string_buf(varp, mybuf); 5572 } 5573 5574 char_u * 5575 tv_get_string_buf(typval_T *varp, char_u *buf) 5576 { 5577 char_u *res = tv_get_string_buf_chk(varp, buf); 5578 5579 return res != NULL ? res : (char_u *)""; 5580 } 5581 5582 /* 5583 * Careful: This uses a single, static buffer. YOU CAN ONLY USE IT ONCE! 5584 */ 5585 char_u * 5586 tv_get_string_chk(typval_T *varp) 5587 { 5588 static char_u mybuf[NUMBUFLEN]; 5589 5590 return tv_get_string_buf_chk(varp, mybuf); 5591 } 5592 5593 char_u * 5594 tv_get_string_buf_chk(typval_T *varp, char_u *buf) 5595 { 5596 switch (varp->v_type) 5597 { 5598 case VAR_NUMBER: 5599 vim_snprintf((char *)buf, NUMBUFLEN, "%lld", 5600 (long_long_T)varp->vval.v_number); 5601 return buf; 5602 case VAR_FUNC: 5603 case VAR_PARTIAL: 5604 emsg(_("E729: using Funcref as a String")); 5605 break; 5606 case VAR_LIST: 5607 emsg(_("E730: using List as a String")); 5608 break; 5609 case VAR_DICT: 5610 emsg(_("E731: using Dictionary as a String")); 5611 break; 5612 case VAR_FLOAT: 5613 #ifdef FEAT_FLOAT 5614 emsg(_(e_float_as_string)); 5615 break; 5616 #endif 5617 case VAR_STRING: 5618 if (varp->vval.v_string != NULL) 5619 return varp->vval.v_string; 5620 return (char_u *)""; 5621 case VAR_SPECIAL: 5622 STRCPY(buf, get_var_special_name(varp->vval.v_number)); 5623 return buf; 5624 case VAR_BLOB: 5625 emsg(_("E976: using Blob as a String")); 5626 break; 5627 case VAR_JOB: 5628 #ifdef FEAT_JOB_CHANNEL 5629 { 5630 job_T *job = varp->vval.v_job; 5631 char *status; 5632 5633 if (job == NULL) 5634 return (char_u *)"no process"; 5635 status = job->jv_status == JOB_FAILED ? "fail" 5636 : job->jv_status >= JOB_ENDED ? "dead" 5637 : "run"; 5638 # ifdef UNIX 5639 vim_snprintf((char *)buf, NUMBUFLEN, 5640 "process %ld %s", (long)job->jv_pid, status); 5641 # elif defined(MSWIN) 5642 vim_snprintf((char *)buf, NUMBUFLEN, 5643 "process %ld %s", 5644 (long)job->jv_proc_info.dwProcessId, 5645 status); 5646 # else 5647 // fall-back 5648 vim_snprintf((char *)buf, NUMBUFLEN, "process ? %s", status); 5649 # endif 5650 return buf; 5651 } 5652 #endif 5653 break; 5654 case VAR_CHANNEL: 5655 #ifdef FEAT_JOB_CHANNEL 5656 { 5657 channel_T *channel = varp->vval.v_channel; 5658 char *status = channel_status(channel, -1); 5659 5660 if (channel == NULL) 5661 vim_snprintf((char *)buf, NUMBUFLEN, "channel %s", status); 5662 else 5663 vim_snprintf((char *)buf, NUMBUFLEN, 5664 "channel %d %s", channel->ch_id, status); 5665 return buf; 5666 } 5667 #endif 5668 break; 5669 case VAR_UNKNOWN: 5670 emsg(_("E908: using an invalid value as a String")); 5671 break; 5672 } 5673 return NULL; 5674 } 5675 5676 /* 5677 * Turn a typeval into a string. Similar to tv_get_string_buf() but uses 5678 * string() on Dict, List, etc. 5679 */ 5680 static char_u * 5681 tv_stringify(typval_T *varp, char_u *buf) 5682 { 5683 if (varp->v_type == VAR_LIST 5684 || varp->v_type == VAR_DICT 5685 || varp->v_type == VAR_FUNC 5686 || varp->v_type == VAR_PARTIAL 5687 || varp->v_type == VAR_FLOAT) 5688 { 5689 typval_T tmp; 5690 5691 f_string(varp, &tmp); 5692 tv_get_string_buf(&tmp, buf); 5693 clear_tv(varp); 5694 *varp = tmp; 5695 return tmp.vval.v_string; 5696 } 5697 return tv_get_string_buf(varp, buf); 5698 } 5699 5700 /* 5701 * Return TRUE if typeval "tv" and its value are set to be locked (immutable). 5702 * Also give an error message, using "name" or _("name") when use_gettext is 5703 * TRUE. 5704 */ 5705 static int 5706 tv_check_lock(typval_T *tv, char_u *name, int use_gettext) 5707 { 5708 int lock = 0; 5709 5710 switch (tv->v_type) 5711 { 5712 case VAR_BLOB: 5713 if (tv->vval.v_blob != NULL) 5714 lock = tv->vval.v_blob->bv_lock; 5715 break; 5716 case VAR_LIST: 5717 if (tv->vval.v_list != NULL) 5718 lock = tv->vval.v_list->lv_lock; 5719 break; 5720 case VAR_DICT: 5721 if (tv->vval.v_dict != NULL) 5722 lock = tv->vval.v_dict->dv_lock; 5723 break; 5724 default: 5725 break; 5726 } 5727 return var_check_lock(tv->v_lock, name, use_gettext) 5728 || (lock != 0 && var_check_lock(lock, name, use_gettext)); 5729 } 5730 5731 /* 5732 * Copy the values from typval_T "from" to typval_T "to". 5733 * When needed allocates string or increases reference count. 5734 * Does not make a copy of a list, blob or dict but copies the reference! 5735 * It is OK for "from" and "to" to point to the same item. This is used to 5736 * make a copy later. 5737 */ 5738 void 5739 copy_tv(typval_T *from, typval_T *to) 5740 { 5741 to->v_type = from->v_type; 5742 to->v_lock = 0; 5743 switch (from->v_type) 5744 { 5745 case VAR_NUMBER: 5746 case VAR_SPECIAL: 5747 to->vval.v_number = from->vval.v_number; 5748 break; 5749 case VAR_FLOAT: 5750 #ifdef FEAT_FLOAT 5751 to->vval.v_float = from->vval.v_float; 5752 break; 5753 #endif 5754 case VAR_JOB: 5755 #ifdef FEAT_JOB_CHANNEL 5756 to->vval.v_job = from->vval.v_job; 5757 if (to->vval.v_job != NULL) 5758 ++to->vval.v_job->jv_refcount; 5759 break; 5760 #endif 5761 case VAR_CHANNEL: 5762 #ifdef FEAT_JOB_CHANNEL 5763 to->vval.v_channel = from->vval.v_channel; 5764 if (to->vval.v_channel != NULL) 5765 ++to->vval.v_channel->ch_refcount; 5766 break; 5767 #endif 5768 case VAR_STRING: 5769 case VAR_FUNC: 5770 if (from->vval.v_string == NULL) 5771 to->vval.v_string = NULL; 5772 else 5773 { 5774 to->vval.v_string = vim_strsave(from->vval.v_string); 5775 if (from->v_type == VAR_FUNC) 5776 func_ref(to->vval.v_string); 5777 } 5778 break; 5779 case VAR_PARTIAL: 5780 if (from->vval.v_partial == NULL) 5781 to->vval.v_partial = NULL; 5782 else 5783 { 5784 to->vval.v_partial = from->vval.v_partial; 5785 ++to->vval.v_partial->pt_refcount; 5786 } 5787 break; 5788 case VAR_BLOB: 5789 if (from->vval.v_blob == NULL) 5790 to->vval.v_blob = NULL; 5791 else 5792 { 5793 to->vval.v_blob = from->vval.v_blob; 5794 ++to->vval.v_blob->bv_refcount; 5795 } 5796 break; 5797 case VAR_LIST: 5798 if (from->vval.v_list == NULL) 5799 to->vval.v_list = NULL; 5800 else 5801 { 5802 to->vval.v_list = from->vval.v_list; 5803 ++to->vval.v_list->lv_refcount; 5804 } 5805 break; 5806 case VAR_DICT: 5807 if (from->vval.v_dict == NULL) 5808 to->vval.v_dict = NULL; 5809 else 5810 { 5811 to->vval.v_dict = from->vval.v_dict; 5812 ++to->vval.v_dict->dv_refcount; 5813 } 5814 break; 5815 case VAR_UNKNOWN: 5816 internal_error("copy_tv(UNKNOWN)"); 5817 break; 5818 } 5819 } 5820 5821 /* 5822 * Make a copy of an item. 5823 * Lists and Dictionaries are also copied. A deep copy if "deep" is set. 5824 * For deepcopy() "copyID" is zero for a full copy or the ID for when a 5825 * reference to an already copied list/dict can be used. 5826 * Returns FAIL or OK. 5827 */ 5828 int 5829 item_copy( 5830 typval_T *from, 5831 typval_T *to, 5832 int deep, 5833 int copyID) 5834 { 5835 static int recurse = 0; 5836 int ret = OK; 5837 5838 if (recurse >= DICT_MAXNEST) 5839 { 5840 emsg(_("E698: variable nested too deep for making a copy")); 5841 return FAIL; 5842 } 5843 ++recurse; 5844 5845 switch (from->v_type) 5846 { 5847 case VAR_NUMBER: 5848 case VAR_FLOAT: 5849 case VAR_STRING: 5850 case VAR_FUNC: 5851 case VAR_PARTIAL: 5852 case VAR_SPECIAL: 5853 case VAR_JOB: 5854 case VAR_CHANNEL: 5855 copy_tv(from, to); 5856 break; 5857 case VAR_LIST: 5858 to->v_type = VAR_LIST; 5859 to->v_lock = 0; 5860 if (from->vval.v_list == NULL) 5861 to->vval.v_list = NULL; 5862 else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID) 5863 { 5864 // use the copy made earlier 5865 to->vval.v_list = from->vval.v_list->lv_copylist; 5866 ++to->vval.v_list->lv_refcount; 5867 } 5868 else 5869 to->vval.v_list = list_copy(from->vval.v_list, deep, copyID); 5870 if (to->vval.v_list == NULL) 5871 ret = FAIL; 5872 break; 5873 case VAR_BLOB: 5874 ret = blob_copy(from, to); 5875 break; 5876 case VAR_DICT: 5877 to->v_type = VAR_DICT; 5878 to->v_lock = 0; 5879 if (from->vval.v_dict == NULL) 5880 to->vval.v_dict = NULL; 5881 else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID) 5882 { 5883 // use the copy made earlier 5884 to->vval.v_dict = from->vval.v_dict->dv_copydict; 5885 ++to->vval.v_dict->dv_refcount; 5886 } 5887 else 5888 to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID); 5889 if (to->vval.v_dict == NULL) 5890 ret = FAIL; 5891 break; 5892 case VAR_UNKNOWN: 5893 internal_error("item_copy(UNKNOWN)"); 5894 ret = FAIL; 5895 } 5896 --recurse; 5897 return ret; 5898 } 5899 5900 /* 5901 * ":echo expr1 ..." print each argument separated with a space, add a 5902 * newline at the end. 5903 * ":echon expr1 ..." print each argument plain. 5904 */ 5905 void 5906 ex_echo(exarg_T *eap) 5907 { 5908 char_u *arg = eap->arg; 5909 typval_T rettv; 5910 char_u *tofree; 5911 char_u *p; 5912 int needclr = TRUE; 5913 int atstart = TRUE; 5914 char_u numbuf[NUMBUFLEN]; 5915 int did_emsg_before = did_emsg; 5916 int called_emsg_before = called_emsg; 5917 5918 if (eap->skip) 5919 ++emsg_skip; 5920 while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int) 5921 { 5922 // If eval1() causes an error message the text from the command may 5923 // still need to be cleared. E.g., "echo 22,44". 5924 need_clr_eos = needclr; 5925 5926 p = arg; 5927 if (eval1(&arg, &rettv, !eap->skip) == FAIL) 5928 { 5929 /* 5930 * Report the invalid expression unless the expression evaluation 5931 * has been cancelled due to an aborting error, an interrupt, or an 5932 * exception. 5933 */ 5934 if (!aborting() && did_emsg == did_emsg_before 5935 && called_emsg == called_emsg_before) 5936 semsg(_(e_invexpr2), p); 5937 need_clr_eos = FALSE; 5938 break; 5939 } 5940 need_clr_eos = FALSE; 5941 5942 if (!eap->skip) 5943 { 5944 if (atstart) 5945 { 5946 atstart = FALSE; 5947 // Call msg_start() after eval1(), evaluating the expression 5948 // may cause a message to appear. 5949 if (eap->cmdidx == CMD_echo) 5950 { 5951 // Mark the saved text as finishing the line, so that what 5952 // follows is displayed on a new line when scrolling back 5953 // at the more prompt. 5954 msg_sb_eol(); 5955 msg_start(); 5956 } 5957 } 5958 else if (eap->cmdidx == CMD_echo) 5959 msg_puts_attr(" ", echo_attr); 5960 p = echo_string(&rettv, &tofree, numbuf, get_copyID()); 5961 if (p != NULL) 5962 for ( ; *p != NUL && !got_int; ++p) 5963 { 5964 if (*p == '\n' || *p == '\r' || *p == TAB) 5965 { 5966 if (*p != TAB && needclr) 5967 { 5968 // remove any text still there from the command 5969 msg_clr_eos(); 5970 needclr = FALSE; 5971 } 5972 msg_putchar_attr(*p, echo_attr); 5973 } 5974 else 5975 { 5976 if (has_mbyte) 5977 { 5978 int i = (*mb_ptr2len)(p); 5979 5980 (void)msg_outtrans_len_attr(p, i, echo_attr); 5981 p += i - 1; 5982 } 5983 else 5984 (void)msg_outtrans_len_attr(p, 1, echo_attr); 5985 } 5986 } 5987 vim_free(tofree); 5988 } 5989 clear_tv(&rettv); 5990 arg = skipwhite(arg); 5991 } 5992 eap->nextcmd = check_nextcmd(arg); 5993 5994 if (eap->skip) 5995 --emsg_skip; 5996 else 5997 { 5998 // remove text that may still be there from the command 5999 if (needclr) 6000 msg_clr_eos(); 6001 if (eap->cmdidx == CMD_echo) 6002 msg_end(); 6003 } 6004 } 6005 6006 /* 6007 * ":echohl {name}". 6008 */ 6009 void 6010 ex_echohl(exarg_T *eap) 6011 { 6012 echo_attr = syn_name2attr(eap->arg); 6013 } 6014 6015 /* 6016 * Returns the :echo attribute 6017 */ 6018 int 6019 get_echo_attr(void) 6020 { 6021 return echo_attr; 6022 } 6023 6024 /* 6025 * ":execute expr1 ..." execute the result of an expression. 6026 * ":echomsg expr1 ..." Print a message 6027 * ":echoerr expr1 ..." Print an error 6028 * Each gets spaces around each argument and a newline at the end for 6029 * echo commands 6030 */ 6031 void 6032 ex_execute(exarg_T *eap) 6033 { 6034 char_u *arg = eap->arg; 6035 typval_T rettv; 6036 int ret = OK; 6037 char_u *p; 6038 garray_T ga; 6039 int len; 6040 int save_did_emsg; 6041 6042 ga_init2(&ga, 1, 80); 6043 6044 if (eap->skip) 6045 ++emsg_skip; 6046 while (*arg != NUL && *arg != '|' && *arg != '\n') 6047 { 6048 ret = eval1_emsg(&arg, &rettv, !eap->skip); 6049 if (ret == FAIL) 6050 break; 6051 6052 if (!eap->skip) 6053 { 6054 char_u buf[NUMBUFLEN]; 6055 6056 if (eap->cmdidx == CMD_execute) 6057 p = tv_get_string_buf(&rettv, buf); 6058 else 6059 p = tv_stringify(&rettv, buf); 6060 len = (int)STRLEN(p); 6061 if (ga_grow(&ga, len + 2) == FAIL) 6062 { 6063 clear_tv(&rettv); 6064 ret = FAIL; 6065 break; 6066 } 6067 if (ga.ga_len) 6068 ((char_u *)(ga.ga_data))[ga.ga_len++] = ' '; 6069 STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p); 6070 ga.ga_len += len; 6071 } 6072 6073 clear_tv(&rettv); 6074 arg = skipwhite(arg); 6075 } 6076 6077 if (ret != FAIL && ga.ga_data != NULL) 6078 { 6079 if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr) 6080 { 6081 // Mark the already saved text as finishing the line, so that what 6082 // follows is displayed on a new line when scrolling back at the 6083 // more prompt. 6084 msg_sb_eol(); 6085 } 6086 6087 if (eap->cmdidx == CMD_echomsg) 6088 { 6089 msg_attr(ga.ga_data, echo_attr); 6090 out_flush(); 6091 } 6092 else if (eap->cmdidx == CMD_echoerr) 6093 { 6094 // We don't want to abort following commands, restore did_emsg. 6095 save_did_emsg = did_emsg; 6096 emsg(ga.ga_data); 6097 if (!force_abort) 6098 did_emsg = save_did_emsg; 6099 } 6100 else if (eap->cmdidx == CMD_execute) 6101 do_cmdline((char_u *)ga.ga_data, 6102 eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE); 6103 } 6104 6105 ga_clear(&ga); 6106 6107 if (eap->skip) 6108 --emsg_skip; 6109 6110 eap->nextcmd = check_nextcmd(arg); 6111 } 6112 6113 /* 6114 * Skip over the name of an option: "&option", "&g:option" or "&l:option". 6115 * "arg" points to the "&" or '+' when called, to "option" when returning. 6116 * Returns NULL when no option name found. Otherwise pointer to the char 6117 * after the option name. 6118 */ 6119 char_u * 6120 find_option_end(char_u **arg, int *opt_flags) 6121 { 6122 char_u *p = *arg; 6123 6124 ++p; 6125 if (*p == 'g' && p[1] == ':') 6126 { 6127 *opt_flags = OPT_GLOBAL; 6128 p += 2; 6129 } 6130 else if (*p == 'l' && p[1] == ':') 6131 { 6132 *opt_flags = OPT_LOCAL; 6133 p += 2; 6134 } 6135 else 6136 *opt_flags = 0; 6137 6138 if (!ASCII_ISALPHA(*p)) 6139 return NULL; 6140 *arg = p; 6141 6142 if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL) 6143 p += 4; // termcap option 6144 else 6145 while (ASCII_ISALPHA(*p)) 6146 ++p; 6147 return p; 6148 } 6149 6150 /* 6151 * Display script name where an item was last set. 6152 * Should only be invoked when 'verbose' is non-zero. 6153 */ 6154 void 6155 last_set_msg(sctx_T script_ctx) 6156 { 6157 char_u *p; 6158 6159 if (script_ctx.sc_sid != 0) 6160 { 6161 p = home_replace_save(NULL, get_scriptname(script_ctx.sc_sid)); 6162 if (p != NULL) 6163 { 6164 verbose_enter(); 6165 msg_puts(_("\n\tLast set from ")); 6166 msg_puts((char *)p); 6167 if (script_ctx.sc_lnum > 0) 6168 { 6169 msg_puts(_(line_msg)); 6170 msg_outnum((long)script_ctx.sc_lnum); 6171 } 6172 verbose_leave(); 6173 vim_free(p); 6174 } 6175 } 6176 } 6177 6178 /* 6179 * Compare "typ1" and "typ2". Put the result in "typ1". 6180 */ 6181 int 6182 typval_compare( 6183 typval_T *typ1, // first operand 6184 typval_T *typ2, // second operand 6185 exptype_T type, // operator 6186 int ic) // ignore case 6187 { 6188 int i; 6189 varnumber_T n1, n2; 6190 char_u *s1, *s2; 6191 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 6192 int type_is = type == EXPR_IS || type == EXPR_ISNOT; 6193 6194 if (type_is && typ1->v_type != typ2->v_type) 6195 { 6196 // For "is" a different type always means FALSE, for "notis" 6197 // it means TRUE. 6198 n1 = (type == EXPR_ISNOT); 6199 } 6200 else if (typ1->v_type == VAR_BLOB || typ2->v_type == VAR_BLOB) 6201 { 6202 if (type_is) 6203 { 6204 n1 = (typ1->v_type == typ2->v_type 6205 && typ1->vval.v_blob == typ2->vval.v_blob); 6206 if (type == EXPR_ISNOT) 6207 n1 = !n1; 6208 } 6209 else if (typ1->v_type != typ2->v_type 6210 || (type != EXPR_EQUAL && type != EXPR_NEQUAL)) 6211 { 6212 if (typ1->v_type != typ2->v_type) 6213 emsg(_("E977: Can only compare Blob with Blob")); 6214 else 6215 emsg(_(e_invalblob)); 6216 clear_tv(typ1); 6217 return FAIL; 6218 } 6219 else 6220 { 6221 // Compare two Blobs for being equal or unequal. 6222 n1 = blob_equal(typ1->vval.v_blob, typ2->vval.v_blob); 6223 if (type == EXPR_NEQUAL) 6224 n1 = !n1; 6225 } 6226 } 6227 else if (typ1->v_type == VAR_LIST || typ2->v_type == VAR_LIST) 6228 { 6229 if (type_is) 6230 { 6231 n1 = (typ1->v_type == typ2->v_type 6232 && typ1->vval.v_list == typ2->vval.v_list); 6233 if (type == EXPR_ISNOT) 6234 n1 = !n1; 6235 } 6236 else if (typ1->v_type != typ2->v_type 6237 || (type != EXPR_EQUAL && type != EXPR_NEQUAL)) 6238 { 6239 if (typ1->v_type != typ2->v_type) 6240 emsg(_("E691: Can only compare List with List")); 6241 else 6242 emsg(_("E692: Invalid operation for List")); 6243 clear_tv(typ1); 6244 return FAIL; 6245 } 6246 else 6247 { 6248 // Compare two Lists for being equal or unequal. 6249 n1 = list_equal(typ1->vval.v_list, typ2->vval.v_list, 6250 ic, FALSE); 6251 if (type == EXPR_NEQUAL) 6252 n1 = !n1; 6253 } 6254 } 6255 6256 else if (typ1->v_type == VAR_DICT || typ2->v_type == VAR_DICT) 6257 { 6258 if (type_is) 6259 { 6260 n1 = (typ1->v_type == typ2->v_type 6261 && typ1->vval.v_dict == typ2->vval.v_dict); 6262 if (type == EXPR_ISNOT) 6263 n1 = !n1; 6264 } 6265 else if (typ1->v_type != typ2->v_type 6266 || (type != EXPR_EQUAL && type != EXPR_NEQUAL)) 6267 { 6268 if (typ1->v_type != typ2->v_type) 6269 emsg(_("E735: Can only compare Dictionary with Dictionary")); 6270 else 6271 emsg(_("E736: Invalid operation for Dictionary")); 6272 clear_tv(typ1); 6273 return FAIL; 6274 } 6275 else 6276 { 6277 // Compare two Dictionaries for being equal or unequal. 6278 n1 = dict_equal(typ1->vval.v_dict, typ2->vval.v_dict, 6279 ic, FALSE); 6280 if (type == EXPR_NEQUAL) 6281 n1 = !n1; 6282 } 6283 } 6284 6285 else if (typ1->v_type == VAR_FUNC || typ2->v_type == VAR_FUNC 6286 || typ1->v_type == VAR_PARTIAL || typ2->v_type == VAR_PARTIAL) 6287 { 6288 if (type != EXPR_EQUAL && type != EXPR_NEQUAL 6289 && type != EXPR_IS && type != EXPR_ISNOT) 6290 { 6291 emsg(_("E694: Invalid operation for Funcrefs")); 6292 clear_tv(typ1); 6293 return FAIL; 6294 } 6295 if ((typ1->v_type == VAR_PARTIAL 6296 && typ1->vval.v_partial == NULL) 6297 || (typ2->v_type == VAR_PARTIAL 6298 && typ2->vval.v_partial == NULL)) 6299 // when a partial is NULL assume not equal 6300 n1 = FALSE; 6301 else if (type_is) 6302 { 6303 if (typ1->v_type == VAR_FUNC && typ2->v_type == VAR_FUNC) 6304 // strings are considered the same if their value is 6305 // the same 6306 n1 = tv_equal(typ1, typ2, ic, FALSE); 6307 else if (typ1->v_type == VAR_PARTIAL 6308 && typ2->v_type == VAR_PARTIAL) 6309 n1 = (typ1->vval.v_partial == typ2->vval.v_partial); 6310 else 6311 n1 = FALSE; 6312 } 6313 else 6314 n1 = tv_equal(typ1, typ2, ic, FALSE); 6315 if (type == EXPR_NEQUAL || type == EXPR_ISNOT) 6316 n1 = !n1; 6317 } 6318 6319 #ifdef FEAT_FLOAT 6320 /* 6321 * If one of the two variables is a float, compare as a float. 6322 * When using "=~" or "!~", always compare as string. 6323 */ 6324 else if ((typ1->v_type == VAR_FLOAT || typ2->v_type == VAR_FLOAT) 6325 && type != EXPR_MATCH && type != EXPR_NOMATCH) 6326 { 6327 float_T f1, f2; 6328 6329 f1 = tv_get_float(typ1); 6330 f2 = tv_get_float(typ2); 6331 n1 = FALSE; 6332 switch (type) 6333 { 6334 case EXPR_IS: 6335 case EXPR_EQUAL: n1 = (f1 == f2); break; 6336 case EXPR_ISNOT: 6337 case EXPR_NEQUAL: n1 = (f1 != f2); break; 6338 case EXPR_GREATER: n1 = (f1 > f2); break; 6339 case EXPR_GEQUAL: n1 = (f1 >= f2); break; 6340 case EXPR_SMALLER: n1 = (f1 < f2); break; 6341 case EXPR_SEQUAL: n1 = (f1 <= f2); break; 6342 case EXPR_UNKNOWN: 6343 case EXPR_MATCH: 6344 case EXPR_NOMATCH: break; // avoid gcc warning 6345 } 6346 } 6347 #endif 6348 6349 /* 6350 * If one of the two variables is a number, compare as a number. 6351 * When using "=~" or "!~", always compare as string. 6352 */ 6353 else if ((typ1->v_type == VAR_NUMBER || typ2->v_type == VAR_NUMBER) 6354 && type != EXPR_MATCH && type != EXPR_NOMATCH) 6355 { 6356 n1 = tv_get_number(typ1); 6357 n2 = tv_get_number(typ2); 6358 switch (type) 6359 { 6360 case EXPR_IS: 6361 case EXPR_EQUAL: n1 = (n1 == n2); break; 6362 case EXPR_ISNOT: 6363 case EXPR_NEQUAL: n1 = (n1 != n2); break; 6364 case EXPR_GREATER: n1 = (n1 > n2); break; 6365 case EXPR_GEQUAL: n1 = (n1 >= n2); break; 6366 case EXPR_SMALLER: n1 = (n1 < n2); break; 6367 case EXPR_SEQUAL: n1 = (n1 <= n2); break; 6368 case EXPR_UNKNOWN: 6369 case EXPR_MATCH: 6370 case EXPR_NOMATCH: break; // avoid gcc warning 6371 } 6372 } 6373 else 6374 { 6375 s1 = tv_get_string_buf(typ1, buf1); 6376 s2 = tv_get_string_buf(typ2, buf2); 6377 if (type != EXPR_MATCH && type != EXPR_NOMATCH) 6378 i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2); 6379 else 6380 i = 0; 6381 n1 = FALSE; 6382 switch (type) 6383 { 6384 case EXPR_IS: 6385 case EXPR_EQUAL: n1 = (i == 0); break; 6386 case EXPR_ISNOT: 6387 case EXPR_NEQUAL: n1 = (i != 0); break; 6388 case EXPR_GREATER: n1 = (i > 0); break; 6389 case EXPR_GEQUAL: n1 = (i >= 0); break; 6390 case EXPR_SMALLER: n1 = (i < 0); break; 6391 case EXPR_SEQUAL: n1 = (i <= 0); break; 6392 6393 case EXPR_MATCH: 6394 case EXPR_NOMATCH: 6395 n1 = pattern_match(s2, s1, ic); 6396 if (type == EXPR_NOMATCH) 6397 n1 = !n1; 6398 break; 6399 6400 case EXPR_UNKNOWN: break; // avoid gcc warning 6401 } 6402 } 6403 clear_tv(typ1); 6404 typ1->v_type = VAR_NUMBER; 6405 typ1->vval.v_number = n1; 6406 6407 return OK; 6408 } 6409 6410 char_u * 6411 typval_tostring(typval_T *arg) 6412 { 6413 char_u *tofree; 6414 char_u numbuf[NUMBUFLEN]; 6415 char_u *ret = NULL; 6416 6417 if (arg == NULL) 6418 return vim_strsave((char_u *)"(does not exist)"); 6419 ret = tv2string(arg, &tofree, numbuf, 0); 6420 // Make a copy if we have a value but it's not in allocated memory. 6421 if (ret != NULL && tofree == NULL) 6422 ret = vim_strsave(ret); 6423 return ret; 6424 } 6425 6426 #endif // FEAT_EVAL 6427 6428 /* 6429 * Perform a substitution on "str" with pattern "pat" and substitute "sub". 6430 * When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL. 6431 * "flags" can be "g" to do a global substitute. 6432 * Returns an allocated string, NULL for error. 6433 */ 6434 char_u * 6435 do_string_sub( 6436 char_u *str, 6437 char_u *pat, 6438 char_u *sub, 6439 typval_T *expr, 6440 char_u *flags) 6441 { 6442 int sublen; 6443 regmatch_T regmatch; 6444 int i; 6445 int do_all; 6446 char_u *tail; 6447 char_u *end; 6448 garray_T ga; 6449 char_u *ret; 6450 char_u *save_cpo; 6451 char_u *zero_width = NULL; 6452 6453 // Make 'cpoptions' empty, so that the 'l' flag doesn't work here 6454 save_cpo = p_cpo; 6455 p_cpo = empty_option; 6456 6457 ga_init2(&ga, 1, 200); 6458 6459 do_all = (flags[0] == 'g'); 6460 6461 regmatch.rm_ic = p_ic; 6462 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 6463 if (regmatch.regprog != NULL) 6464 { 6465 tail = str; 6466 end = str + STRLEN(str); 6467 while (vim_regexec_nl(®match, str, (colnr_T)(tail - str))) 6468 { 6469 // Skip empty match except for first match. 6470 if (regmatch.startp[0] == regmatch.endp[0]) 6471 { 6472 if (zero_width == regmatch.startp[0]) 6473 { 6474 // avoid getting stuck on a match with an empty string 6475 i = mb_ptr2len(tail); 6476 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, 6477 (size_t)i); 6478 ga.ga_len += i; 6479 tail += i; 6480 continue; 6481 } 6482 zero_width = regmatch.startp[0]; 6483 } 6484 6485 /* 6486 * Get some space for a temporary buffer to do the substitution 6487 * into. It will contain: 6488 * - The text up to where the match is. 6489 * - The substituted text. 6490 * - The text after the match. 6491 */ 6492 sublen = vim_regsub(®match, sub, expr, tail, FALSE, TRUE, FALSE); 6493 if (ga_grow(&ga, (int)((end - tail) + sublen - 6494 (regmatch.endp[0] - regmatch.startp[0]))) == FAIL) 6495 { 6496 ga_clear(&ga); 6497 break; 6498 } 6499 6500 // copy the text up to where the match is 6501 i = (int)(regmatch.startp[0] - tail); 6502 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i); 6503 // add the substituted text 6504 (void)vim_regsub(®match, sub, expr, (char_u *)ga.ga_data 6505 + ga.ga_len + i, TRUE, TRUE, FALSE); 6506 ga.ga_len += i + sublen - 1; 6507 tail = regmatch.endp[0]; 6508 if (*tail == NUL) 6509 break; 6510 if (!do_all) 6511 break; 6512 } 6513 6514 if (ga.ga_data != NULL) 6515 STRCPY((char *)ga.ga_data + ga.ga_len, tail); 6516 6517 vim_regfree(regmatch.regprog); 6518 } 6519 6520 ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data); 6521 ga_clear(&ga); 6522 if (p_cpo == empty_option) 6523 p_cpo = save_cpo; 6524 else 6525 // Darn, evaluating {sub} expression or {expr} changed the value. 6526 free_string_option(save_cpo); 6527 6528 return ret; 6529 } 6530