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 #define NAMESPACE_CHAR (char_u *)"abglstvw" 24 25 /* 26 * When recursively copying lists and dicts we need to remember which ones we 27 * have done to avoid endless recursiveness. This unique ID is used for that. 28 * The last bit is used for previous_funccal, ignored when comparing. 29 */ 30 static int current_copyID = 0; 31 32 /* 33 * Info used by a ":for" loop. 34 */ 35 typedef struct 36 { 37 int fi_semicolon; // TRUE if ending in '; var]' 38 int fi_varcount; // nr of variables in the list 39 int fi_break_count; // nr of line breaks encountered 40 listwatch_T fi_lw; // keep an eye on the item used. 41 list_T *fi_list; // list being used 42 int fi_bi; // index of blob 43 blob_T *fi_blob; // blob being used 44 char_u *fi_string; // copy of string being used 45 int fi_byte_idx; // byte index in fi_string 46 } forinfo_T; 47 48 static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op); 49 static int eval2(char_u **arg, typval_T *rettv, evalarg_T *evalarg); 50 static int eval3(char_u **arg, typval_T *rettv, evalarg_T *evalarg); 51 static int eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg); 52 static int eval5(char_u **arg, typval_T *rettv, evalarg_T *evalarg); 53 static int eval6(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string); 54 static int eval7t(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string); 55 static int eval7(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string); 56 static int eval7_leader(typval_T *rettv, int numeric_only, char_u *start_leader, char_u **end_leaderp); 57 58 static int free_unref_items(int copyID); 59 static char_u *make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end); 60 static char_u *eval_next_line(evalarg_T *evalarg); 61 62 /* 63 * Return "n1" divided by "n2", taking care of dividing by zero. 64 * If "failed" is not NULL set it to TRUE when dividing by zero fails. 65 */ 66 varnumber_T 67 num_divide(varnumber_T n1, varnumber_T n2, int *failed) 68 { 69 varnumber_T result; 70 71 if (n2 == 0) 72 { 73 if (in_vim9script()) 74 { 75 emsg(_(e_divide_by_zero)); 76 if (failed != NULL) 77 *failed = TRUE; 78 } 79 if (n1 == 0) 80 result = VARNUM_MIN; // similar to NaN 81 else if (n1 < 0) 82 result = -VARNUM_MAX; 83 else 84 result = VARNUM_MAX; 85 } 86 else 87 result = n1 / n2; 88 89 return result; 90 } 91 92 /* 93 * Return "n1" modulus "n2", taking care of dividing by zero. 94 * If "failed" is not NULL set it to TRUE when dividing by zero fails. 95 */ 96 varnumber_T 97 num_modulus(varnumber_T n1, varnumber_T n2, int *failed) 98 { 99 if (n2 == 0 && in_vim9script()) 100 { 101 emsg(_(e_divide_by_zero)); 102 if (failed != NULL) 103 *failed = TRUE; 104 } 105 return (n2 == 0) ? 0 : (n1 % n2); 106 } 107 108 /* 109 * Initialize the global and v: variables. 110 */ 111 void 112 eval_init(void) 113 { 114 evalvars_init(); 115 func_init(); 116 117 #ifdef EBCDIC 118 /* 119 * Sort the function table, to enable binary search. 120 */ 121 sortFunctions(); 122 #endif 123 } 124 125 #if defined(EXITFREE) || defined(PROTO) 126 void 127 eval_clear(void) 128 { 129 evalvars_clear(); 130 free_scriptnames(); // must come after evalvars_clear(). 131 free_locales(); 132 133 // autoloaded script names 134 free_autoload_scriptnames(); 135 136 // unreferenced lists and dicts 137 (void)garbage_collect(FALSE); 138 139 // functions not garbage collected 140 free_all_functions(); 141 } 142 #endif 143 144 void 145 fill_evalarg_from_eap(evalarg_T *evalarg, exarg_T *eap, int skip) 146 { 147 CLEAR_FIELD(*evalarg); 148 evalarg->eval_flags = skip ? 0 : EVAL_EVALUATE; 149 if (eap != NULL && getline_equal(eap->getline, eap->cookie, getsourceline)) 150 { 151 evalarg->eval_getline = eap->getline; 152 evalarg->eval_cookie = eap->cookie; 153 } 154 } 155 156 /* 157 * Top level evaluation function, returning a boolean. 158 * Sets "error" to TRUE if there was an error. 159 * Return TRUE or FALSE. 160 */ 161 int 162 eval_to_bool( 163 char_u *arg, 164 int *error, 165 exarg_T *eap, 166 int skip) // only parse, don't execute 167 { 168 typval_T tv; 169 varnumber_T retval = FALSE; 170 evalarg_T evalarg; 171 172 fill_evalarg_from_eap(&evalarg, eap, skip); 173 174 if (skip) 175 ++emsg_skip; 176 if (eval0(arg, &tv, eap, &evalarg) == FAIL) 177 *error = TRUE; 178 else 179 { 180 *error = FALSE; 181 if (!skip) 182 { 183 if (in_vim9script()) 184 retval = tv_get_bool_chk(&tv, error); 185 else 186 retval = (tv_get_number_chk(&tv, error) != 0); 187 clear_tv(&tv); 188 } 189 } 190 if (skip) 191 --emsg_skip; 192 clear_evalarg(&evalarg, eap); 193 194 return (int)retval; 195 } 196 197 /* 198 * Call eval1() and give an error message if not done at a lower level. 199 */ 200 static int 201 eval1_emsg(char_u **arg, typval_T *rettv, exarg_T *eap) 202 { 203 char_u *start = *arg; 204 int ret; 205 int did_emsg_before = did_emsg; 206 int called_emsg_before = called_emsg; 207 evalarg_T evalarg; 208 209 fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip); 210 211 ret = eval1(arg, rettv, &evalarg); 212 if (ret == FAIL) 213 { 214 // Report the invalid expression unless the expression evaluation has 215 // been cancelled due to an aborting error, an interrupt, or an 216 // exception, or we already gave a more specific error. 217 // Also check called_emsg for when using assert_fails(). 218 if (!aborting() && did_emsg == did_emsg_before 219 && called_emsg == called_emsg_before) 220 semsg(_(e_invalid_expression_str), start); 221 } 222 clear_evalarg(&evalarg, eap); 223 return ret; 224 } 225 226 /* 227 * Return whether a typval is a valid expression to pass to eval_expr_typval() 228 * or eval_expr_to_bool(). An empty string returns FALSE; 229 */ 230 int 231 eval_expr_valid_arg(typval_T *tv) 232 { 233 return tv->v_type != VAR_UNKNOWN 234 && (tv->v_type != VAR_STRING 235 || (tv->vval.v_string != NULL && *tv->vval.v_string != NUL)); 236 } 237 238 /* 239 * Evaluate an expression, which can be a function, partial or string. 240 * Pass arguments "argv[argc]". 241 * Return the result in "rettv" and OK or FAIL. 242 */ 243 int 244 eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv) 245 { 246 char_u *s; 247 char_u buf[NUMBUFLEN]; 248 funcexe_T funcexe; 249 250 if (expr->v_type == VAR_FUNC) 251 { 252 s = expr->vval.v_string; 253 if (s == NULL || *s == NUL) 254 return FAIL; 255 CLEAR_FIELD(funcexe); 256 funcexe.evaluate = TRUE; 257 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 258 return FAIL; 259 } 260 else if (expr->v_type == VAR_PARTIAL) 261 { 262 partial_T *partial = expr->vval.v_partial; 263 264 if (partial == NULL) 265 return FAIL; 266 267 if (partial->pt_func != NULL 268 && partial->pt_func->uf_def_status != UF_NOT_COMPILED) 269 { 270 if (call_def_function(partial->pt_func, argc, argv, 271 partial, rettv) == FAIL) 272 return FAIL; 273 } 274 else 275 { 276 s = partial_name(partial); 277 if (s == NULL || *s == NUL) 278 return FAIL; 279 CLEAR_FIELD(funcexe); 280 funcexe.evaluate = TRUE; 281 funcexe.partial = partial; 282 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 283 return FAIL; 284 } 285 } 286 else if (expr->v_type == VAR_INSTR) 287 { 288 return exe_typval_instr(expr, rettv); 289 } 290 else 291 { 292 s = tv_get_string_buf_chk(expr, buf); 293 if (s == NULL) 294 return FAIL; 295 s = skipwhite(s); 296 if (eval1_emsg(&s, rettv, NULL) == FAIL) 297 return FAIL; 298 if (*skipwhite(s) != NUL) // check for trailing chars after expr 299 { 300 clear_tv(rettv); 301 semsg(_(e_invalid_expression_str), s); 302 return FAIL; 303 } 304 } 305 return OK; 306 } 307 308 /* 309 * Like eval_to_bool() but using a typval_T instead of a string. 310 * Works for string, funcref and partial. 311 */ 312 int 313 eval_expr_to_bool(typval_T *expr, int *error) 314 { 315 typval_T rettv; 316 int res; 317 318 if (eval_expr_typval(expr, NULL, 0, &rettv) == FAIL) 319 { 320 *error = TRUE; 321 return FALSE; 322 } 323 res = (tv_get_bool_chk(&rettv, error) != 0); 324 clear_tv(&rettv); 325 return res; 326 } 327 328 /* 329 * Top level evaluation function, returning a string. If "skip" is TRUE, 330 * only parsing to "nextcmd" is done, without reporting errors. Return 331 * pointer to allocated memory, or NULL for failure or when "skip" is TRUE. 332 */ 333 char_u * 334 eval_to_string_skip( 335 char_u *arg, 336 exarg_T *eap, 337 int skip) // only parse, don't execute 338 { 339 typval_T tv; 340 char_u *retval; 341 evalarg_T evalarg; 342 343 fill_evalarg_from_eap(&evalarg, eap, skip); 344 if (skip) 345 ++emsg_skip; 346 if (eval0(arg, &tv, eap, &evalarg) == FAIL || skip) 347 retval = NULL; 348 else 349 { 350 retval = vim_strsave(tv_get_string(&tv)); 351 clear_tv(&tv); 352 } 353 if (skip) 354 --emsg_skip; 355 clear_evalarg(&evalarg, eap); 356 357 return retval; 358 } 359 360 /* 361 * Skip over an expression at "*pp". 362 * Return FAIL for an error, OK otherwise. 363 */ 364 int 365 skip_expr(char_u **pp, evalarg_T *evalarg) 366 { 367 typval_T rettv; 368 369 *pp = skipwhite(*pp); 370 return eval1(pp, &rettv, evalarg); 371 } 372 373 /* 374 * Skip over an expression at "*arg". 375 * If in Vim9 script and line breaks are encountered, the lines are 376 * concatenated. "evalarg->eval_tofree" will be set accordingly. 377 * "arg" is advanced to just after the expression. 378 * "start" is set to the start of the expression, "end" to just after the end. 379 * Also when the expression is copied to allocated memory. 380 * Return FAIL for an error, OK otherwise. 381 */ 382 int 383 skip_expr_concatenate( 384 char_u **arg, 385 char_u **start, 386 char_u **end, 387 evalarg_T *evalarg) 388 { 389 typval_T rettv; 390 int res; 391 int vim9script = in_vim9script(); 392 garray_T *gap = evalarg == NULL ? NULL : &evalarg->eval_ga; 393 garray_T *freegap = evalarg == NULL ? NULL : &evalarg->eval_freega; 394 int save_flags = evalarg == NULL ? 0 : evalarg->eval_flags; 395 int evaluate = evalarg == NULL 396 ? FALSE : (evalarg->eval_flags & EVAL_EVALUATE); 397 398 if (vim9script && evaluate 399 && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)) 400 { 401 ga_init2(gap, sizeof(char_u *), 10); 402 // leave room for "start" 403 if (ga_grow(gap, 1) == OK) 404 ++gap->ga_len; 405 ga_init2(freegap, sizeof(char_u *), 10); 406 } 407 *start = *arg; 408 409 // Don't evaluate the expression. 410 if (evalarg != NULL) 411 evalarg->eval_flags &= ~EVAL_EVALUATE; 412 *arg = skipwhite(*arg); 413 res = eval1(arg, &rettv, evalarg); 414 *end = *arg; 415 if (evalarg != NULL) 416 evalarg->eval_flags = save_flags; 417 418 if (vim9script && evaluate 419 && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)) 420 { 421 if (evalarg->eval_ga.ga_len == 1) 422 { 423 // just the one line, no need to concatenate 424 ga_clear(gap); 425 gap->ga_itemsize = 0; 426 } 427 else 428 { 429 char_u *p; 430 size_t endoff = STRLEN(*arg); 431 432 // Line breaks encountered, concatenate all the lines. 433 *((char_u **)gap->ga_data) = *start; 434 p = ga_concat_strings(gap, " "); 435 436 // free the lines only when using getsourceline() 437 if (evalarg->eval_cookie != NULL) 438 { 439 // Do not free the first line, the caller can still use it. 440 *((char_u **)gap->ga_data) = NULL; 441 // Do not free the last line, "arg" points into it, free it 442 // later. 443 vim_free(evalarg->eval_tofree); 444 evalarg->eval_tofree = 445 ((char_u **)gap->ga_data)[gap->ga_len - 1]; 446 ((char_u **)gap->ga_data)[gap->ga_len - 1] = NULL; 447 ga_clear_strings(gap); 448 } 449 else 450 { 451 ga_clear(gap); 452 453 // free lines that were explicitly marked for freeing 454 ga_clear_strings(freegap); 455 } 456 457 gap->ga_itemsize = 0; 458 if (p == NULL) 459 return FAIL; 460 *start = p; 461 vim_free(evalarg->eval_tofree_lambda); 462 evalarg->eval_tofree_lambda = p; 463 // Compute "end" relative to the end. 464 *end = *start + STRLEN(*start) - endoff; 465 } 466 } 467 468 return res; 469 } 470 471 /* 472 * Convert "tv" to a string. 473 * When "convert" is TRUE convert a List into a sequence of lines and convert 474 * a Float to a String. 475 * Returns an allocated string (NULL when out of memory). 476 */ 477 char_u * 478 typval2string(typval_T *tv, int convert) 479 { 480 garray_T ga; 481 char_u *retval; 482 #ifdef FEAT_FLOAT 483 char_u numbuf[NUMBUFLEN]; 484 #endif 485 486 if (convert && tv->v_type == VAR_LIST) 487 { 488 ga_init2(&ga, (int)sizeof(char), 80); 489 if (tv->vval.v_list != NULL) 490 { 491 list_join(&ga, tv->vval.v_list, (char_u *)"\n", TRUE, FALSE, 0); 492 if (tv->vval.v_list->lv_len > 0) 493 ga_append(&ga, NL); 494 } 495 ga_append(&ga, NUL); 496 retval = (char_u *)ga.ga_data; 497 } 498 #ifdef FEAT_FLOAT 499 else if (convert && tv->v_type == VAR_FLOAT) 500 { 501 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float); 502 retval = vim_strsave(numbuf); 503 } 504 #endif 505 else 506 retval = vim_strsave(tv_get_string(tv)); 507 return retval; 508 } 509 510 /* 511 * Top level evaluation function, returning a string. Does not handle line 512 * breaks. 513 * When "convert" is TRUE convert a List into a sequence of lines and convert 514 * a Float to a String. 515 * Return pointer to allocated memory, or NULL for failure. 516 */ 517 char_u * 518 eval_to_string_eap( 519 char_u *arg, 520 int convert, 521 exarg_T *eap) 522 { 523 typval_T tv; 524 char_u *retval; 525 evalarg_T evalarg; 526 527 fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip); 528 if (eval0(arg, &tv, NULL, &evalarg) == FAIL) 529 retval = NULL; 530 else 531 { 532 retval = typval2string(&tv, convert); 533 clear_tv(&tv); 534 } 535 clear_evalarg(&evalarg, NULL); 536 537 return retval; 538 } 539 540 char_u * 541 eval_to_string( 542 char_u *arg, 543 int convert) 544 { 545 return eval_to_string_eap(arg, convert, NULL); 546 } 547 548 /* 549 * Call eval_to_string() without using current local variables and using 550 * textwinlock. When "use_sandbox" is TRUE use the sandbox. 551 * Use legacy Vim script syntax. 552 */ 553 char_u * 554 eval_to_string_safe( 555 char_u *arg, 556 int use_sandbox) 557 { 558 char_u *retval; 559 funccal_entry_T funccal_entry; 560 int save_sc_version = current_sctx.sc_version; 561 562 current_sctx.sc_version = 1; 563 save_funccal(&funccal_entry); 564 if (use_sandbox) 565 ++sandbox; 566 ++textwinlock; 567 retval = eval_to_string(arg, FALSE); 568 if (use_sandbox) 569 --sandbox; 570 --textwinlock; 571 restore_funccal(); 572 current_sctx.sc_version = save_sc_version; 573 return retval; 574 } 575 576 /* 577 * Top level evaluation function, returning a number. 578 * Evaluates "expr" silently. 579 * Returns -1 for an error. 580 */ 581 varnumber_T 582 eval_to_number(char_u *expr) 583 { 584 typval_T rettv; 585 varnumber_T retval; 586 char_u *p = skipwhite(expr); 587 588 ++emsg_off; 589 590 if (eval1(&p, &rettv, &EVALARG_EVALUATE) == FAIL) 591 retval = -1; 592 else 593 { 594 retval = tv_get_number_chk(&rettv, NULL); 595 clear_tv(&rettv); 596 } 597 --emsg_off; 598 599 return retval; 600 } 601 602 /* 603 * Top level evaluation function. 604 * Returns an allocated typval_T with the result. 605 * Returns NULL when there is an error. 606 */ 607 typval_T * 608 eval_expr(char_u *arg, exarg_T *eap) 609 { 610 typval_T *tv; 611 evalarg_T evalarg; 612 613 fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip); 614 615 tv = ALLOC_ONE(typval_T); 616 if (tv != NULL && eval0(arg, tv, eap, &evalarg) == FAIL) 617 VIM_CLEAR(tv); 618 619 clear_evalarg(&evalarg, eap); 620 return tv; 621 } 622 623 /* 624 * Call some Vim script function and return the result in "*rettv". 625 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] 626 * should have type VAR_UNKNOWN. 627 * Returns OK or FAIL. 628 */ 629 int 630 call_vim_function( 631 char_u *func, 632 int argc, 633 typval_T *argv, 634 typval_T *rettv) 635 { 636 int ret; 637 funcexe_T funcexe; 638 639 rettv->v_type = VAR_UNKNOWN; // clear_tv() uses this 640 CLEAR_FIELD(funcexe); 641 funcexe.firstline = curwin->w_cursor.lnum; 642 funcexe.lastline = curwin->w_cursor.lnum; 643 funcexe.evaluate = TRUE; 644 ret = call_func(func, -1, rettv, argc, argv, &funcexe); 645 if (ret == FAIL) 646 clear_tv(rettv); 647 648 return ret; 649 } 650 651 /* 652 * Call Vim script function "func" and return the result as a number. 653 * Returns -1 when calling the function fails. 654 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 655 * have type VAR_UNKNOWN. 656 */ 657 varnumber_T 658 call_func_retnr( 659 char_u *func, 660 int argc, 661 typval_T *argv) 662 { 663 typval_T rettv; 664 varnumber_T retval; 665 666 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 667 return -1; 668 669 retval = tv_get_number_chk(&rettv, NULL); 670 clear_tv(&rettv); 671 return retval; 672 } 673 674 /* 675 * Call Vim script function like call_func_retnr() and drop the result. 676 * Returns FAIL when calling the function fails. 677 */ 678 int 679 call_func_noret( 680 char_u *func, 681 int argc, 682 typval_T *argv) 683 { 684 typval_T rettv; 685 686 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 687 return FAIL; 688 clear_tv(&rettv); 689 return OK; 690 } 691 692 /* 693 * Call Vim script function "func" and return the result as a string. 694 * Uses "argv" and "argc" as call_func_retnr(). 695 * Returns NULL when calling the function fails. 696 */ 697 void * 698 call_func_retstr( 699 char_u *func, 700 int argc, 701 typval_T *argv) 702 { 703 typval_T rettv; 704 char_u *retval; 705 706 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 707 return NULL; 708 709 retval = vim_strsave(tv_get_string(&rettv)); 710 clear_tv(&rettv); 711 return retval; 712 } 713 714 /* 715 * Call Vim script function "func" and return the result as a List. 716 * Uses "argv" and "argc" as call_func_retnr(). 717 * Returns NULL when there is something wrong. 718 */ 719 void * 720 call_func_retlist( 721 char_u *func, 722 int argc, 723 typval_T *argv) 724 { 725 typval_T rettv; 726 727 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 728 return NULL; 729 730 if (rettv.v_type != VAR_LIST) 731 { 732 clear_tv(&rettv); 733 return NULL; 734 } 735 736 return rettv.vval.v_list; 737 } 738 739 #ifdef FEAT_FOLDING 740 /* 741 * Evaluate "arg", which is 'foldexpr'. 742 * Note: caller must set "curwin" to match "arg". 743 * Returns the foldlevel, and any character preceding it in "*cp". Doesn't 744 * give error messages. 745 */ 746 int 747 eval_foldexpr(char_u *arg, int *cp) 748 { 749 typval_T tv; 750 varnumber_T retval; 751 char_u *s; 752 int use_sandbox = was_set_insecurely((char_u *)"foldexpr", 753 OPT_LOCAL); 754 755 ++emsg_off; 756 if (use_sandbox) 757 ++sandbox; 758 ++textwinlock; 759 *cp = NUL; 760 if (eval0(arg, &tv, NULL, &EVALARG_EVALUATE) == FAIL) 761 retval = 0; 762 else 763 { 764 // If the result is a number, just return the number. 765 if (tv.v_type == VAR_NUMBER) 766 retval = tv.vval.v_number; 767 else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL) 768 retval = 0; 769 else 770 { 771 // If the result is a string, check if there is a non-digit before 772 // the number. 773 s = tv.vval.v_string; 774 if (!VIM_ISDIGIT(*s) && *s != '-') 775 *cp = *s++; 776 retval = atol((char *)s); 777 } 778 clear_tv(&tv); 779 } 780 --emsg_off; 781 if (use_sandbox) 782 --sandbox; 783 --textwinlock; 784 clear_evalarg(&EVALARG_EVALUATE, NULL); 785 786 return (int)retval; 787 } 788 #endif 789 790 /* 791 * Get an lval: variable, Dict item or List item that can be assigned a value 792 * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]", 793 * "name.key", "name.key[expr]" etc. 794 * Indexing only works if "name" is an existing List or Dictionary. 795 * "name" points to the start of the name. 796 * If "rettv" is not NULL it points to the value to be assigned. 797 * "unlet" is TRUE for ":unlet": slightly different behavior when something is 798 * wrong; must end in space or cmd separator. 799 * 800 * flags: 801 * GLV_QUIET: do not give error messages 802 * GLV_READ_ONLY: will not change the variable 803 * GLV_NO_AUTOLOAD: do not use script autoloading 804 * 805 * Returns a pointer to just after the name, including indexes. 806 * When an evaluation error occurs "lp->ll_name" is NULL; 807 * Returns NULL for a parsing error. Still need to free items in "lp"! 808 */ 809 char_u * 810 get_lval( 811 char_u *name, 812 typval_T *rettv, 813 lval_T *lp, 814 int unlet, 815 int skip, 816 int flags, // GLV_ values 817 int fne_flags) // flags for find_name_end() 818 { 819 char_u *p; 820 char_u *expr_start, *expr_end; 821 int cc; 822 dictitem_T *v; 823 typval_T var1; 824 typval_T var2; 825 int empty1 = FALSE; 826 listitem_T *ni; 827 char_u *key = NULL; 828 int len; 829 hashtab_T *ht = NULL; 830 int quiet = flags & GLV_QUIET; 831 int writing; 832 833 // Clear everything in "lp". 834 CLEAR_POINTER(lp); 835 836 if (skip || (flags & GLV_COMPILING)) 837 { 838 // When skipping or compiling just find the end of the name. 839 lp->ll_name = name; 840 lp->ll_name_end = find_name_end(name, NULL, NULL, 841 FNE_INCL_BR | fne_flags); 842 return lp->ll_name_end; 843 } 844 845 // Find the end of the name. 846 p = find_name_end(name, &expr_start, &expr_end, fne_flags); 847 lp->ll_name_end = p; 848 if (expr_start != NULL) 849 { 850 // Don't expand the name when we already know there is an error. 851 if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p) 852 && *p != '[' && *p != '.') 853 { 854 semsg(_(e_trailing_arg), p); 855 return NULL; 856 } 857 858 lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p); 859 if (lp->ll_exp_name == NULL) 860 { 861 // Report an invalid expression in braces, unless the 862 // expression evaluation has been cancelled due to an 863 // aborting error, an interrupt, or an exception. 864 if (!aborting() && !quiet) 865 { 866 emsg_severe = TRUE; 867 semsg(_(e_invarg2), name); 868 return NULL; 869 } 870 } 871 lp->ll_name = lp->ll_exp_name; 872 } 873 else 874 { 875 lp->ll_name = name; 876 877 if (in_vim9script()) 878 { 879 // "a: type" is declaring variable "a" with a type, not "a:". 880 if (p == name + 2 && p[-1] == ':') 881 { 882 --p; 883 lp->ll_name_end = p; 884 } 885 if (*p == ':') 886 { 887 scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid); 888 char_u *tp = skipwhite(p + 1); 889 890 // parse the type after the name 891 lp->ll_type = parse_type(&tp, &si->sn_type_list, !quiet); 892 if (lp->ll_type == NULL && !quiet) 893 return NULL; 894 lp->ll_name_end = tp; 895 } 896 } 897 } 898 899 // Without [idx] or .key we are done. 900 if ((*p != '[' && *p != '.') || lp->ll_name == NULL) 901 return p; 902 903 cc = *p; 904 *p = NUL; 905 // When we would write to the variable pass &ht and prevent autoload. 906 writing = !(flags & GLV_READ_ONLY); 907 v = find_var(lp->ll_name, writing ? &ht : NULL, 908 (flags & GLV_NO_AUTOLOAD) || writing); 909 if (v == NULL && !quiet) 910 semsg(_(e_undefined_variable_str), lp->ll_name); 911 *p = cc; 912 if (v == NULL) 913 return NULL; 914 915 if (in_vim9script() && (flags & GLV_NO_DECL) == 0) 916 { 917 if (!quiet) 918 semsg(_(e_variable_already_declared), lp->ll_name); 919 return NULL; 920 } 921 922 /* 923 * Loop until no more [idx] or .key is following. 924 */ 925 lp->ll_tv = &v->di_tv; 926 var1.v_type = VAR_UNKNOWN; 927 var2.v_type = VAR_UNKNOWN; 928 while (*p == '[' || (*p == '.' && p[1] != '=' && p[1] != '.')) 929 { 930 if (*p == '.' && lp->ll_tv->v_type != VAR_DICT) 931 { 932 if (!quiet) 933 semsg(_(e_dot_can_only_be_used_on_dictionary_str), name); 934 return NULL; 935 } 936 if (lp->ll_tv->v_type != VAR_LIST 937 && lp->ll_tv->v_type != VAR_DICT 938 && lp->ll_tv->v_type != VAR_BLOB) 939 { 940 if (!quiet) 941 emsg(_("E689: Can only index a List, Dictionary or Blob")); 942 return NULL; 943 } 944 945 // a NULL list/blob works like an empty list/blob, allocate one now. 946 if (lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list == NULL) 947 rettv_list_alloc(lp->ll_tv); 948 else if (lp->ll_tv->v_type == VAR_BLOB 949 && lp->ll_tv->vval.v_blob == NULL) 950 rettv_blob_alloc(lp->ll_tv); 951 952 if (lp->ll_range) 953 { 954 if (!quiet) 955 emsg(_("E708: [:] must come last")); 956 return NULL; 957 } 958 959 if (in_vim9script() && lp->ll_valtype == NULL 960 && lp->ll_tv == &v->di_tv 961 && ht != NULL && ht == get_script_local_ht()) 962 { 963 svar_T *sv = find_typval_in_script(lp->ll_tv); 964 965 // Vim9 script local variable: get the type 966 if (sv != NULL) 967 lp->ll_valtype = sv->sv_type; 968 } 969 970 len = -1; 971 if (*p == '.') 972 { 973 key = p + 1; 974 for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len) 975 ; 976 if (len == 0) 977 { 978 if (!quiet) 979 emsg(_(e_emptykey)); 980 return NULL; 981 } 982 p = key + len; 983 } 984 else 985 { 986 // Get the index [expr] or the first index [expr: ]. 987 p = skipwhite(p + 1); 988 if (*p == ':') 989 empty1 = TRUE; 990 else 991 { 992 empty1 = FALSE; 993 if (eval1(&p, &var1, &EVALARG_EVALUATE) == FAIL) // recursive! 994 return NULL; 995 if (tv_get_string_chk(&var1) == NULL) 996 { 997 // not a number or string 998 clear_tv(&var1); 999 return NULL; 1000 } 1001 p = skipwhite(p); 1002 } 1003 1004 // Optionally get the second index [ :expr]. 1005 if (*p == ':') 1006 { 1007 if (lp->ll_tv->v_type == VAR_DICT) 1008 { 1009 if (!quiet) 1010 emsg(_(e_cannot_slice_dictionary)); 1011 clear_tv(&var1); 1012 return NULL; 1013 } 1014 if (rettv != NULL 1015 && !(rettv->v_type == VAR_LIST 1016 && rettv->vval.v_list != NULL) 1017 && !(rettv->v_type == VAR_BLOB 1018 && rettv->vval.v_blob != NULL)) 1019 { 1020 if (!quiet) 1021 emsg(_("E709: [:] requires a List or Blob value")); 1022 clear_tv(&var1); 1023 return NULL; 1024 } 1025 p = skipwhite(p + 1); 1026 if (*p == ']') 1027 lp->ll_empty2 = TRUE; 1028 else 1029 { 1030 lp->ll_empty2 = FALSE; 1031 // recursive! 1032 if (eval1(&p, &var2, &EVALARG_EVALUATE) == FAIL) 1033 { 1034 clear_tv(&var1); 1035 return NULL; 1036 } 1037 if (tv_get_string_chk(&var2) == NULL) 1038 { 1039 // not a number or string 1040 clear_tv(&var1); 1041 clear_tv(&var2); 1042 return NULL; 1043 } 1044 } 1045 lp->ll_range = TRUE; 1046 } 1047 else 1048 lp->ll_range = FALSE; 1049 1050 if (*p != ']') 1051 { 1052 if (!quiet) 1053 emsg(_(e_missbrac)); 1054 clear_tv(&var1); 1055 clear_tv(&var2); 1056 return NULL; 1057 } 1058 1059 // Skip to past ']'. 1060 ++p; 1061 } 1062 1063 if (lp->ll_tv->v_type == VAR_DICT) 1064 { 1065 if (len == -1) 1066 { 1067 // "[key]": get key from "var1" 1068 key = tv_get_string_chk(&var1); // is number or string 1069 if (key == NULL) 1070 { 1071 clear_tv(&var1); 1072 return NULL; 1073 } 1074 } 1075 lp->ll_list = NULL; 1076 1077 // a NULL dict is equivalent with an empty dict 1078 if (lp->ll_tv->vval.v_dict == NULL) 1079 { 1080 lp->ll_tv->vval.v_dict = dict_alloc(); 1081 if (lp->ll_tv->vval.v_dict == NULL) 1082 { 1083 clear_tv(&var1); 1084 return NULL; 1085 } 1086 ++lp->ll_tv->vval.v_dict->dv_refcount; 1087 } 1088 lp->ll_dict = lp->ll_tv->vval.v_dict; 1089 1090 lp->ll_di = dict_find(lp->ll_dict, key, len); 1091 1092 // When assigning to a scope dictionary check that a function and 1093 // variable name is valid (only variable name unless it is l: or 1094 // g: dictionary). Disallow overwriting a builtin function. 1095 if (rettv != NULL && lp->ll_dict->dv_scope != 0) 1096 { 1097 int prevval; 1098 int wrong; 1099 1100 if (len != -1) 1101 { 1102 prevval = key[len]; 1103 key[len] = NUL; 1104 } 1105 else 1106 prevval = 0; // avoid compiler warning 1107 wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE 1108 && rettv->v_type == VAR_FUNC 1109 && var_wrong_func_name(key, lp->ll_di == NULL)) 1110 || !valid_varname(key, TRUE); 1111 if (len != -1) 1112 key[len] = prevval; 1113 if (wrong) 1114 { 1115 clear_tv(&var1); 1116 return NULL; 1117 } 1118 } 1119 1120 if (lp->ll_valtype != NULL) 1121 // use the type of the member 1122 lp->ll_valtype = lp->ll_valtype->tt_member; 1123 1124 if (lp->ll_di == NULL) 1125 { 1126 // Can't add "v:" or "a:" variable. 1127 if (lp->ll_dict == get_vimvar_dict() 1128 || &lp->ll_dict->dv_hashtab == get_funccal_args_ht()) 1129 { 1130 semsg(_(e_illvar), name); 1131 clear_tv(&var1); 1132 return NULL; 1133 } 1134 1135 // Key does not exist in dict: may need to add it. 1136 if (*p == '[' || *p == '.' || unlet) 1137 { 1138 if (!quiet) 1139 semsg(_(e_dictkey), key); 1140 clear_tv(&var1); 1141 return NULL; 1142 } 1143 if (len == -1) 1144 lp->ll_newkey = vim_strsave(key); 1145 else 1146 lp->ll_newkey = vim_strnsave(key, len); 1147 clear_tv(&var1); 1148 if (lp->ll_newkey == NULL) 1149 p = NULL; 1150 break; 1151 } 1152 // existing variable, need to check if it can be changed 1153 else if ((flags & GLV_READ_ONLY) == 0 1154 && (var_check_ro(lp->ll_di->di_flags, name, FALSE) 1155 || var_check_lock(lp->ll_di->di_flags, name, FALSE))) 1156 { 1157 clear_tv(&var1); 1158 return NULL; 1159 } 1160 1161 clear_tv(&var1); 1162 lp->ll_tv = &lp->ll_di->di_tv; 1163 } 1164 else if (lp->ll_tv->v_type == VAR_BLOB) 1165 { 1166 long bloblen = blob_len(lp->ll_tv->vval.v_blob); 1167 1168 /* 1169 * Get the number and item for the only or first index of the List. 1170 */ 1171 if (empty1) 1172 lp->ll_n1 = 0; 1173 else 1174 // is number or string 1175 lp->ll_n1 = (long)tv_get_number(&var1); 1176 clear_tv(&var1); 1177 1178 if (check_blob_index(bloblen, lp->ll_n1, quiet) == FAIL) 1179 { 1180 clear_tv(&var2); 1181 return NULL; 1182 } 1183 if (lp->ll_range && !lp->ll_empty2) 1184 { 1185 lp->ll_n2 = (long)tv_get_number(&var2); 1186 clear_tv(&var2); 1187 if (check_blob_range(bloblen, lp->ll_n1, lp->ll_n2, quiet) 1188 == FAIL) 1189 return NULL; 1190 } 1191 lp->ll_blob = lp->ll_tv->vval.v_blob; 1192 lp->ll_tv = NULL; 1193 break; 1194 } 1195 else 1196 { 1197 /* 1198 * Get the number and item for the only or first index of the List. 1199 */ 1200 if (empty1) 1201 lp->ll_n1 = 0; 1202 else 1203 // is number or string 1204 lp->ll_n1 = (long)tv_get_number(&var1); 1205 clear_tv(&var1); 1206 1207 lp->ll_dict = NULL; 1208 lp->ll_list = lp->ll_tv->vval.v_list; 1209 lp->ll_li = list_find_index(lp->ll_list, &lp->ll_n1); 1210 if (lp->ll_li == NULL) 1211 { 1212 // Vim9: Allow for adding an item at the end. 1213 if (in_vim9script() && lp->ll_n1 == lp->ll_list->lv_len 1214 && lp->ll_list->lv_lock == 0) 1215 { 1216 list_append_number(lp->ll_list, 0); 1217 lp->ll_li = list_find_index(lp->ll_list, &lp->ll_n1); 1218 } 1219 if (lp->ll_li == NULL) 1220 { 1221 clear_tv(&var2); 1222 if (!quiet) 1223 semsg(_(e_listidx), lp->ll_n1); 1224 return NULL; 1225 } 1226 } 1227 1228 if (lp->ll_valtype != NULL) 1229 // use the type of the member 1230 lp->ll_valtype = lp->ll_valtype->tt_member; 1231 1232 /* 1233 * May need to find the item or absolute index for the second 1234 * index of a range. 1235 * When no index given: "lp->ll_empty2" is TRUE. 1236 * Otherwise "lp->ll_n2" is set to the second index. 1237 */ 1238 if (lp->ll_range && !lp->ll_empty2) 1239 { 1240 lp->ll_n2 = (long)tv_get_number(&var2); 1241 // is number or string 1242 clear_tv(&var2); 1243 if (lp->ll_n2 < 0) 1244 { 1245 ni = list_find(lp->ll_list, lp->ll_n2); 1246 if (ni == NULL) 1247 { 1248 if (!quiet) 1249 semsg(_(e_listidx), lp->ll_n2); 1250 return NULL; 1251 } 1252 lp->ll_n2 = list_idx_of_item(lp->ll_list, ni); 1253 } 1254 1255 // Check that lp->ll_n2 isn't before lp->ll_n1. 1256 if (lp->ll_n1 < 0) 1257 lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li); 1258 if (lp->ll_n2 < lp->ll_n1) 1259 { 1260 if (!quiet) 1261 semsg(_(e_listidx), lp->ll_n2); 1262 return NULL; 1263 } 1264 } 1265 1266 lp->ll_tv = &lp->ll_li->li_tv; 1267 } 1268 } 1269 1270 clear_tv(&var1); 1271 lp->ll_name_end = p; 1272 return p; 1273 } 1274 1275 /* 1276 * Clear lval "lp" that was filled by get_lval(). 1277 */ 1278 void 1279 clear_lval(lval_T *lp) 1280 { 1281 vim_free(lp->ll_exp_name); 1282 vim_free(lp->ll_newkey); 1283 } 1284 1285 /* 1286 * Set a variable that was parsed by get_lval() to "rettv". 1287 * "endp" points to just after the parsed name. 1288 * "op" is NULL, "+" for "+=", "-" for "-=", "*" for "*=", "/" for "/=", 1289 * "%" for "%=", "." for ".=" or "=" for "=". 1290 */ 1291 void 1292 set_var_lval( 1293 lval_T *lp, 1294 char_u *endp, 1295 typval_T *rettv, 1296 int copy, 1297 int flags, // ASSIGN_CONST, ASSIGN_NO_DECL 1298 char_u *op, 1299 int var_idx) // index for "let [a, b] = list" 1300 { 1301 int cc; 1302 listitem_T *ri; 1303 dictitem_T *di; 1304 1305 if (lp->ll_tv == NULL) 1306 { 1307 cc = *endp; 1308 *endp = NUL; 1309 if (in_vim9script() && check_reserved_name(lp->ll_name) == FAIL) 1310 return; 1311 1312 if (lp->ll_blob != NULL) 1313 { 1314 int error = FALSE, val; 1315 1316 if (op != NULL && *op != '=') 1317 { 1318 semsg(_(e_letwrong), op); 1319 return; 1320 } 1321 if (value_check_lock(lp->ll_blob->bv_lock, lp->ll_name, FALSE)) 1322 return; 1323 1324 if (lp->ll_range && rettv->v_type == VAR_BLOB) 1325 { 1326 if (lp->ll_empty2) 1327 lp->ll_n2 = blob_len(lp->ll_blob) - 1; 1328 1329 if (blob_set_range(lp->ll_blob, lp->ll_n1, lp->ll_n2, 1330 rettv) == FAIL) 1331 return; 1332 } 1333 else 1334 { 1335 val = (int)tv_get_number_chk(rettv, &error); 1336 if (!error) 1337 blob_set_append(lp->ll_blob, lp->ll_n1, val); 1338 } 1339 } 1340 else if (op != NULL && *op != '=') 1341 { 1342 typval_T tv; 1343 1344 if ((flags & (ASSIGN_CONST | ASSIGN_FINAL)) 1345 && (flags & ASSIGN_FOR_LOOP) == 0) 1346 { 1347 emsg(_(e_cannot_mod)); 1348 *endp = cc; 1349 return; 1350 } 1351 1352 // handle +=, -=, *=, /=, %= and .= 1353 di = NULL; 1354 if (eval_variable(lp->ll_name, (int)STRLEN(lp->ll_name), 1355 &tv, &di, EVAL_VAR_VERBOSE) == OK) 1356 { 1357 if ((di == NULL 1358 || (!var_check_ro(di->di_flags, lp->ll_name, FALSE) 1359 && !tv_check_lock(&di->di_tv, lp->ll_name, FALSE))) 1360 && tv_op(&tv, rettv, op) == OK) 1361 set_var_const(lp->ll_name, NULL, &tv, FALSE, 1362 ASSIGN_NO_DECL, 0); 1363 clear_tv(&tv); 1364 } 1365 } 1366 else 1367 { 1368 if (lp->ll_type != NULL && check_typval_arg_type(lp->ll_type, rettv, 1369 NULL, 0) == FAIL) 1370 return; 1371 set_var_const(lp->ll_name, lp->ll_type, rettv, copy, 1372 flags, var_idx); 1373 } 1374 *endp = cc; 1375 } 1376 else if (value_check_lock(lp->ll_newkey == NULL 1377 ? lp->ll_tv->v_lock 1378 : lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE)) 1379 ; 1380 else if (lp->ll_range) 1381 { 1382 listitem_T *ll_li = lp->ll_li; 1383 int ll_n1 = lp->ll_n1; 1384 1385 if ((flags & (ASSIGN_CONST | ASSIGN_FINAL)) 1386 && (flags & ASSIGN_FOR_LOOP) == 0) 1387 { 1388 emsg(_("E996: Cannot lock a range")); 1389 return; 1390 } 1391 1392 /* 1393 * Check whether any of the list items is locked 1394 */ 1395 for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; ) 1396 { 1397 if (value_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE)) 1398 return; 1399 ri = ri->li_next; 1400 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1)) 1401 break; 1402 ll_li = ll_li->li_next; 1403 ++ll_n1; 1404 } 1405 1406 /* 1407 * Assign the List values to the list items. 1408 */ 1409 for (ri = rettv->vval.v_list->lv_first; ri != NULL; ) 1410 { 1411 if (op != NULL && *op != '=') 1412 tv_op(&lp->ll_li->li_tv, &ri->li_tv, op); 1413 else 1414 { 1415 clear_tv(&lp->ll_li->li_tv); 1416 copy_tv(&ri->li_tv, &lp->ll_li->li_tv); 1417 } 1418 ri = ri->li_next; 1419 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1)) 1420 break; 1421 if (lp->ll_li->li_next == NULL) 1422 { 1423 // Need to add an empty item. 1424 if (list_append_number(lp->ll_list, 0) == FAIL) 1425 { 1426 ri = NULL; 1427 break; 1428 } 1429 } 1430 lp->ll_li = lp->ll_li->li_next; 1431 ++lp->ll_n1; 1432 } 1433 if (ri != NULL) 1434 emsg(_(e_list_value_has_more_items_than_targets)); 1435 else if (lp->ll_empty2 1436 ? (lp->ll_li != NULL && lp->ll_li->li_next != NULL) 1437 : lp->ll_n1 != lp->ll_n2) 1438 emsg(_(e_list_value_does_not_have_enough_items)); 1439 } 1440 else 1441 { 1442 /* 1443 * Assign to a List or Dictionary item. 1444 */ 1445 if ((flags & (ASSIGN_CONST | ASSIGN_FINAL)) 1446 && (flags & ASSIGN_FOR_LOOP) == 0) 1447 { 1448 emsg(_("E996: Cannot lock a list or dict")); 1449 return; 1450 } 1451 1452 if (lp->ll_valtype != NULL 1453 && check_typval_arg_type(lp->ll_valtype, rettv, 1454 NULL, 0) == FAIL) 1455 return; 1456 1457 if (lp->ll_newkey != NULL) 1458 { 1459 if (op != NULL && *op != '=') 1460 { 1461 semsg(_(e_dictkey), lp->ll_newkey); 1462 return; 1463 } 1464 if (dict_wrong_func_name(lp->ll_tv->vval.v_dict, rettv, 1465 lp->ll_newkey)) 1466 return; 1467 1468 // Need to add an item to the Dictionary. 1469 di = dictitem_alloc(lp->ll_newkey); 1470 if (di == NULL) 1471 return; 1472 if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL) 1473 { 1474 vim_free(di); 1475 return; 1476 } 1477 lp->ll_tv = &di->di_tv; 1478 } 1479 else if (op != NULL && *op != '=') 1480 { 1481 tv_op(lp->ll_tv, rettv, op); 1482 return; 1483 } 1484 else 1485 clear_tv(lp->ll_tv); 1486 1487 /* 1488 * Assign the value to the variable or list item. 1489 */ 1490 if (copy) 1491 copy_tv(rettv, lp->ll_tv); 1492 else 1493 { 1494 *lp->ll_tv = *rettv; 1495 lp->ll_tv->v_lock = 0; 1496 init_tv(rettv); 1497 } 1498 } 1499 } 1500 1501 /* 1502 * Handle "tv1 += tv2", "tv1 -= tv2", "tv1 *= tv2", "tv1 /= tv2", "tv1 %= tv2" 1503 * and "tv1 .= tv2" 1504 * Returns OK or FAIL. 1505 */ 1506 static int 1507 tv_op(typval_T *tv1, typval_T *tv2, char_u *op) 1508 { 1509 varnumber_T n; 1510 char_u numbuf[NUMBUFLEN]; 1511 char_u *s; 1512 int failed = FALSE; 1513 1514 // Can't do anything with a Funcref, Dict, v:true on the right. 1515 if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT 1516 && tv2->v_type != VAR_BOOL && tv2->v_type != VAR_SPECIAL) 1517 { 1518 switch (tv1->v_type) 1519 { 1520 case VAR_UNKNOWN: 1521 case VAR_ANY: 1522 case VAR_VOID: 1523 case VAR_DICT: 1524 case VAR_FUNC: 1525 case VAR_PARTIAL: 1526 case VAR_BOOL: 1527 case VAR_SPECIAL: 1528 case VAR_JOB: 1529 case VAR_CHANNEL: 1530 case VAR_INSTR: 1531 break; 1532 1533 case VAR_BLOB: 1534 if (*op != '+' || tv2->v_type != VAR_BLOB) 1535 break; 1536 // BLOB += BLOB 1537 if (tv1->vval.v_blob != NULL && tv2->vval.v_blob != NULL) 1538 { 1539 blob_T *b1 = tv1->vval.v_blob; 1540 blob_T *b2 = tv2->vval.v_blob; 1541 int i, len = blob_len(b2); 1542 for (i = 0; i < len; i++) 1543 ga_append(&b1->bv_ga, blob_get(b2, i)); 1544 } 1545 return OK; 1546 1547 case VAR_LIST: 1548 if (*op != '+' || tv2->v_type != VAR_LIST) 1549 break; 1550 // List += List 1551 if (tv2->vval.v_list != NULL) 1552 { 1553 if (tv1->vval.v_list == NULL) 1554 { 1555 tv1->vval.v_list = tv2->vval.v_list; 1556 ++tv1->vval.v_list->lv_refcount; 1557 } 1558 else 1559 list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL); 1560 } 1561 return OK; 1562 1563 case VAR_NUMBER: 1564 case VAR_STRING: 1565 if (tv2->v_type == VAR_LIST) 1566 break; 1567 if (vim_strchr((char_u *)"+-*/%", *op) != NULL) 1568 { 1569 // nr += nr , nr -= nr , nr *=nr , nr /= nr , nr %= nr 1570 n = tv_get_number(tv1); 1571 #ifdef FEAT_FLOAT 1572 if (tv2->v_type == VAR_FLOAT) 1573 { 1574 float_T f = n; 1575 1576 if (*op == '%') 1577 break; 1578 switch (*op) 1579 { 1580 case '+': f += tv2->vval.v_float; break; 1581 case '-': f -= tv2->vval.v_float; break; 1582 case '*': f *= tv2->vval.v_float; break; 1583 case '/': f /= tv2->vval.v_float; break; 1584 } 1585 clear_tv(tv1); 1586 tv1->v_type = VAR_FLOAT; 1587 tv1->vval.v_float = f; 1588 } 1589 else 1590 #endif 1591 { 1592 switch (*op) 1593 { 1594 case '+': n += tv_get_number(tv2); break; 1595 case '-': n -= tv_get_number(tv2); break; 1596 case '*': n *= tv_get_number(tv2); break; 1597 case '/': n = num_divide(n, tv_get_number(tv2), 1598 &failed); break; 1599 case '%': n = num_modulus(n, tv_get_number(tv2), 1600 &failed); break; 1601 } 1602 clear_tv(tv1); 1603 tv1->v_type = VAR_NUMBER; 1604 tv1->vval.v_number = n; 1605 } 1606 } 1607 else 1608 { 1609 if (tv2->v_type == VAR_FLOAT) 1610 break; 1611 1612 // str .= str 1613 s = tv_get_string(tv1); 1614 s = concat_str(s, tv_get_string_buf(tv2, numbuf)); 1615 clear_tv(tv1); 1616 tv1->v_type = VAR_STRING; 1617 tv1->vval.v_string = s; 1618 } 1619 return failed ? FAIL : OK; 1620 1621 case VAR_FLOAT: 1622 #ifdef FEAT_FLOAT 1623 { 1624 float_T f; 1625 1626 if (*op == '%' || *op == '.' 1627 || (tv2->v_type != VAR_FLOAT 1628 && tv2->v_type != VAR_NUMBER 1629 && tv2->v_type != VAR_STRING)) 1630 break; 1631 if (tv2->v_type == VAR_FLOAT) 1632 f = tv2->vval.v_float; 1633 else 1634 f = tv_get_number(tv2); 1635 switch (*op) 1636 { 1637 case '+': tv1->vval.v_float += f; break; 1638 case '-': tv1->vval.v_float -= f; break; 1639 case '*': tv1->vval.v_float *= f; break; 1640 case '/': tv1->vval.v_float /= f; break; 1641 } 1642 } 1643 #endif 1644 return OK; 1645 } 1646 } 1647 1648 semsg(_(e_letwrong), op); 1649 return FAIL; 1650 } 1651 1652 /* 1653 * Evaluate the expression used in a ":for var in expr" command. 1654 * "arg" points to "var". 1655 * Set "*errp" to TRUE for an error, FALSE otherwise; 1656 * Return a pointer that holds the info. Null when there is an error. 1657 */ 1658 void * 1659 eval_for_line( 1660 char_u *arg, 1661 int *errp, 1662 exarg_T *eap, 1663 evalarg_T *evalarg) 1664 { 1665 forinfo_T *fi; 1666 char_u *var_list_end; 1667 char_u *expr; 1668 typval_T tv; 1669 list_T *l; 1670 int skip = !(evalarg->eval_flags & EVAL_EVALUATE); 1671 1672 *errp = TRUE; // default: there is an error 1673 1674 fi = ALLOC_CLEAR_ONE(forinfo_T); 1675 if (fi == NULL) 1676 return NULL; 1677 1678 var_list_end = skip_var_list(arg, TRUE, &fi->fi_varcount, 1679 &fi->fi_semicolon, FALSE); 1680 if (var_list_end == NULL) 1681 return fi; 1682 1683 expr = skipwhite_and_linebreak(var_list_end, evalarg); 1684 if (expr[0] != 'i' || expr[1] != 'n' 1685 || !(expr[2] == NUL || VIM_ISWHITE(expr[2]))) 1686 { 1687 if (in_vim9script() && *expr == ':' && expr != var_list_end) 1688 semsg(_(e_no_white_space_allowed_before_colon_str), expr); 1689 else 1690 emsg(_(e_missing_in)); 1691 return fi; 1692 } 1693 1694 if (skip) 1695 ++emsg_skip; 1696 expr = skipwhite_and_linebreak(expr + 2, evalarg); 1697 if (eval0(expr, &tv, eap, evalarg) == OK) 1698 { 1699 *errp = FALSE; 1700 if (!skip) 1701 { 1702 if (tv.v_type == VAR_LIST) 1703 { 1704 l = tv.vval.v_list; 1705 if (l == NULL) 1706 { 1707 // a null list is like an empty list: do nothing 1708 clear_tv(&tv); 1709 } 1710 else 1711 { 1712 // Need a real list here. 1713 CHECK_LIST_MATERIALIZE(l); 1714 1715 // No need to increment the refcount, it's already set for 1716 // the list being used in "tv". 1717 fi->fi_list = l; 1718 list_add_watch(l, &fi->fi_lw); 1719 fi->fi_lw.lw_item = l->lv_first; 1720 } 1721 } 1722 else if (tv.v_type == VAR_BLOB) 1723 { 1724 fi->fi_bi = 0; 1725 if (tv.vval.v_blob != NULL) 1726 { 1727 typval_T btv; 1728 1729 // Make a copy, so that the iteration still works when the 1730 // blob is changed. 1731 blob_copy(tv.vval.v_blob, &btv); 1732 fi->fi_blob = btv.vval.v_blob; 1733 } 1734 clear_tv(&tv); 1735 } 1736 else if (tv.v_type == VAR_STRING) 1737 { 1738 fi->fi_byte_idx = 0; 1739 fi->fi_string = tv.vval.v_string; 1740 tv.vval.v_string = NULL; 1741 if (fi->fi_string == NULL) 1742 fi->fi_string = vim_strsave((char_u *)""); 1743 } 1744 else 1745 { 1746 emsg(_(e_listreq)); 1747 clear_tv(&tv); 1748 } 1749 } 1750 } 1751 if (skip) 1752 --emsg_skip; 1753 fi->fi_break_count = evalarg->eval_break_count; 1754 1755 return fi; 1756 } 1757 1758 /* 1759 * Used when looping over a :for line, skip the "in expr" part. 1760 */ 1761 void 1762 skip_for_lines(void *fi_void, evalarg_T *evalarg) 1763 { 1764 forinfo_T *fi = (forinfo_T *)fi_void; 1765 int i; 1766 1767 for (i = 0; i < fi->fi_break_count; ++i) 1768 eval_next_line(evalarg); 1769 } 1770 1771 /* 1772 * Use the first item in a ":for" list. Advance to the next. 1773 * Assign the values to the variable (list). "arg" points to the first one. 1774 * Return TRUE when a valid item was found, FALSE when at end of list or 1775 * something wrong. 1776 */ 1777 int 1778 next_for_item(void *fi_void, char_u *arg) 1779 { 1780 forinfo_T *fi = (forinfo_T *)fi_void; 1781 int result; 1782 int flag = ASSIGN_FOR_LOOP | (in_vim9script() 1783 ? (ASSIGN_FINAL 1784 // first round: error if variable exists 1785 | (fi->fi_bi == 0 ? 0 : ASSIGN_DECL) 1786 | ASSIGN_NO_MEMBER_TYPE) 1787 : 0); 1788 listitem_T *item; 1789 int skip_assign = in_vim9script() && arg[0] == '_' 1790 && !eval_isnamec(arg[1]); 1791 1792 if (fi->fi_blob != NULL) 1793 { 1794 typval_T tv; 1795 1796 if (fi->fi_bi >= blob_len(fi->fi_blob)) 1797 return FALSE; 1798 tv.v_type = VAR_NUMBER; 1799 tv.v_lock = VAR_FIXED; 1800 tv.vval.v_number = blob_get(fi->fi_blob, fi->fi_bi); 1801 ++fi->fi_bi; 1802 if (skip_assign) 1803 return TRUE; 1804 return ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon, 1805 fi->fi_varcount, flag, NULL) == OK; 1806 } 1807 1808 if (fi->fi_string != NULL) 1809 { 1810 typval_T tv; 1811 int len; 1812 1813 len = mb_ptr2len(fi->fi_string + fi->fi_byte_idx); 1814 if (len == 0) 1815 return FALSE; 1816 tv.v_type = VAR_STRING; 1817 tv.v_lock = VAR_FIXED; 1818 tv.vval.v_string = vim_strnsave(fi->fi_string + fi->fi_byte_idx, len); 1819 fi->fi_byte_idx += len; 1820 ++fi->fi_bi; 1821 if (skip_assign) 1822 result = TRUE; 1823 else 1824 result = ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon, 1825 fi->fi_varcount, flag, NULL) == OK; 1826 vim_free(tv.vval.v_string); 1827 return result; 1828 } 1829 1830 item = fi->fi_lw.lw_item; 1831 if (item == NULL) 1832 result = FALSE; 1833 else 1834 { 1835 fi->fi_lw.lw_item = item->li_next; 1836 ++fi->fi_bi; 1837 if (skip_assign) 1838 result = TRUE; 1839 else 1840 result = (ex_let_vars(arg, &item->li_tv, TRUE, fi->fi_semicolon, 1841 fi->fi_varcount, flag, NULL) == OK); 1842 } 1843 return result; 1844 } 1845 1846 /* 1847 * Free the structure used to store info used by ":for". 1848 */ 1849 void 1850 free_for_info(void *fi_void) 1851 { 1852 forinfo_T *fi = (forinfo_T *)fi_void; 1853 1854 if (fi == NULL) 1855 return; 1856 if (fi->fi_list != NULL) 1857 { 1858 list_rem_watch(fi->fi_list, &fi->fi_lw); 1859 list_unref(fi->fi_list); 1860 } 1861 else if (fi->fi_blob != NULL) 1862 blob_unref(fi->fi_blob); 1863 else 1864 vim_free(fi->fi_string); 1865 vim_free(fi); 1866 } 1867 1868 void 1869 set_context_for_expression( 1870 expand_T *xp, 1871 char_u *arg, 1872 cmdidx_T cmdidx) 1873 { 1874 int has_expr = cmdidx != CMD_let && cmdidx != CMD_var; 1875 int c; 1876 char_u *p; 1877 1878 if (cmdidx == CMD_let || cmdidx == CMD_var 1879 || cmdidx == CMD_const || cmdidx == CMD_final) 1880 { 1881 xp->xp_context = EXPAND_USER_VARS; 1882 if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL) 1883 { 1884 // ":let var1 var2 ...": find last space. 1885 for (p = arg + STRLEN(arg); p >= arg; ) 1886 { 1887 xp->xp_pattern = p; 1888 MB_PTR_BACK(arg, p); 1889 if (VIM_ISWHITE(*p)) 1890 break; 1891 } 1892 return; 1893 } 1894 } 1895 else 1896 xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS 1897 : EXPAND_EXPRESSION; 1898 while ((xp->xp_pattern = vim_strpbrk(arg, 1899 (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL) 1900 { 1901 c = *xp->xp_pattern; 1902 if (c == '&') 1903 { 1904 c = xp->xp_pattern[1]; 1905 if (c == '&') 1906 { 1907 ++xp->xp_pattern; 1908 xp->xp_context = has_expr ? EXPAND_EXPRESSION : EXPAND_NOTHING; 1909 } 1910 else if (c != ' ') 1911 { 1912 xp->xp_context = EXPAND_SETTINGS; 1913 if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':') 1914 xp->xp_pattern += 2; 1915 1916 } 1917 } 1918 else if (c == '$') 1919 { 1920 // environment variable 1921 xp->xp_context = EXPAND_ENV_VARS; 1922 } 1923 else if (c == '=') 1924 { 1925 has_expr = TRUE; 1926 xp->xp_context = EXPAND_EXPRESSION; 1927 } 1928 else if (c == '#' 1929 && xp->xp_context == EXPAND_EXPRESSION) 1930 { 1931 // Autoload function/variable contains '#'. 1932 break; 1933 } 1934 else if ((c == '<' || c == '#') 1935 && xp->xp_context == EXPAND_FUNCTIONS 1936 && vim_strchr(xp->xp_pattern, '(') == NULL) 1937 { 1938 // Function name can start with "<SNR>" and contain '#'. 1939 break; 1940 } 1941 else if (has_expr) 1942 { 1943 if (c == '"') // string 1944 { 1945 while ((c = *++xp->xp_pattern) != NUL && c != '"') 1946 if (c == '\\' && xp->xp_pattern[1] != NUL) 1947 ++xp->xp_pattern; 1948 xp->xp_context = EXPAND_NOTHING; 1949 } 1950 else if (c == '\'') // literal string 1951 { 1952 // Trick: '' is like stopping and starting a literal string. 1953 while ((c = *++xp->xp_pattern) != NUL && c != '\'') 1954 /* skip */ ; 1955 xp->xp_context = EXPAND_NOTHING; 1956 } 1957 else if (c == '|') 1958 { 1959 if (xp->xp_pattern[1] == '|') 1960 { 1961 ++xp->xp_pattern; 1962 xp->xp_context = EXPAND_EXPRESSION; 1963 } 1964 else 1965 xp->xp_context = EXPAND_COMMANDS; 1966 } 1967 else 1968 xp->xp_context = EXPAND_EXPRESSION; 1969 } 1970 else 1971 // Doesn't look like something valid, expand as an expression 1972 // anyway. 1973 xp->xp_context = EXPAND_EXPRESSION; 1974 arg = xp->xp_pattern; 1975 if (*arg != NUL) 1976 while ((c = *++arg) != NUL && (c == ' ' || c == '\t')) 1977 /* skip */ ; 1978 } 1979 1980 // ":exe one two" completes "two" 1981 if ((cmdidx == CMD_execute 1982 || cmdidx == CMD_echo 1983 || cmdidx == CMD_echon 1984 || cmdidx == CMD_echomsg) 1985 && xp->xp_context == EXPAND_EXPRESSION) 1986 { 1987 for (;;) 1988 { 1989 char_u *n = skiptowhite(arg); 1990 1991 if (n == arg || IS_WHITE_OR_NUL(*skipwhite(n))) 1992 break; 1993 arg = skipwhite(n); 1994 } 1995 } 1996 1997 xp->xp_pattern = arg; 1998 } 1999 2000 /* 2001 * Return TRUE if "pat" matches "text". 2002 * Does not use 'cpo' and always uses 'magic'. 2003 */ 2004 int 2005 pattern_match(char_u *pat, char_u *text, int ic) 2006 { 2007 int matches = FALSE; 2008 char_u *save_cpo; 2009 regmatch_T regmatch; 2010 2011 // avoid 'l' flag in 'cpoptions' 2012 save_cpo = p_cpo; 2013 p_cpo = empty_option; 2014 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 2015 if (regmatch.regprog != NULL) 2016 { 2017 regmatch.rm_ic = ic; 2018 matches = vim_regexec_nl(®match, text, (colnr_T)0); 2019 vim_regfree(regmatch.regprog); 2020 } 2021 p_cpo = save_cpo; 2022 return matches; 2023 } 2024 2025 /* 2026 * Handle a name followed by "(". Both for just "name(arg)" and for 2027 * "expr->name(arg)". 2028 * Returns OK or FAIL. 2029 */ 2030 static int 2031 eval_func( 2032 char_u **arg, // points to "(", will be advanced 2033 evalarg_T *evalarg, 2034 char_u *name, 2035 int name_len, 2036 typval_T *rettv, 2037 int flags, 2038 typval_T *basetv) // "expr" for "expr->name(arg)" 2039 { 2040 int evaluate = flags & EVAL_EVALUATE; 2041 char_u *s = name; 2042 int len = name_len; 2043 partial_T *partial; 2044 int ret = OK; 2045 type_T *type = NULL; 2046 2047 if (!evaluate) 2048 check_vars(s, len); 2049 2050 // If "s" is the name of a variable of type VAR_FUNC 2051 // use its contents. 2052 s = deref_func_name(s, &len, &partial, 2053 in_vim9script() ? &type : NULL, !evaluate); 2054 2055 // Need to make a copy, in case evaluating the arguments makes 2056 // the name invalid. 2057 s = vim_strsave(s); 2058 if (s == NULL || (flags & EVAL_CONSTANT)) 2059 ret = FAIL; 2060 else 2061 { 2062 funcexe_T funcexe; 2063 2064 // Invoke the function. 2065 CLEAR_FIELD(funcexe); 2066 funcexe.firstline = curwin->w_cursor.lnum; 2067 funcexe.lastline = curwin->w_cursor.lnum; 2068 funcexe.evaluate = evaluate; 2069 funcexe.partial = partial; 2070 funcexe.basetv = basetv; 2071 funcexe.check_type = type; 2072 ret = get_func_tv(s, len, rettv, arg, evalarg, &funcexe); 2073 } 2074 vim_free(s); 2075 2076 // If evaluate is FALSE rettv->v_type was not set in 2077 // get_func_tv, but it's needed in handle_subscript() to parse 2078 // what follows. So set it here. 2079 if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(') 2080 { 2081 rettv->vval.v_string = NULL; 2082 rettv->v_type = VAR_FUNC; 2083 } 2084 2085 // Stop the expression evaluation when immediately 2086 // aborting on error, or when an interrupt occurred or 2087 // an exception was thrown but not caught. 2088 if (evaluate && aborting()) 2089 { 2090 if (ret == OK) 2091 clear_tv(rettv); 2092 ret = FAIL; 2093 } 2094 return ret; 2095 } 2096 2097 /* 2098 * Get the next line source line without advancing. But do skip over comment 2099 * lines. 2100 * Only called for Vim9 script. 2101 */ 2102 static char_u * 2103 getline_peek_skip_comments(evalarg_T *evalarg) 2104 { 2105 for (;;) 2106 { 2107 char_u *next = getline_peek(evalarg->eval_getline, 2108 evalarg->eval_cookie); 2109 char_u *p; 2110 2111 if (next == NULL) 2112 break; 2113 p = skipwhite(next); 2114 if (*p != NUL && !vim9_comment_start(p)) 2115 return next; 2116 (void)eval_next_line(evalarg); 2117 } 2118 return NULL; 2119 } 2120 2121 /* 2122 * If inside Vim9 script, "arg" points to the end of a line (ignoring a # 2123 * comment) and there is a next line, return the next line (skipping blanks) 2124 * and set "getnext". 2125 * Otherwise return the next non-white at or after "arg" and set "getnext" to 2126 * FALSE. 2127 * "arg" must point somewhere inside a line, not at the start. 2128 */ 2129 static char_u * 2130 eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext) 2131 { 2132 char_u *p = skipwhite(arg); 2133 2134 *getnext = FALSE; 2135 if (in_vim9script() 2136 && evalarg != NULL 2137 && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL) 2138 && (*p == NUL || (vim9_comment_start(p) && VIM_ISWHITE(p[-1])))) 2139 { 2140 char_u *next; 2141 2142 if (evalarg->eval_cookie != NULL) 2143 next = getline_peek_skip_comments(evalarg); 2144 else 2145 next = peek_next_line_from_context(evalarg->eval_cctx); 2146 2147 if (next != NULL) 2148 { 2149 *getnext = TRUE; 2150 return skipwhite(next); 2151 } 2152 } 2153 return p; 2154 } 2155 2156 /* 2157 * To be called after eval_next_non_blank() sets "getnext" to TRUE. 2158 * Only called for Vim9 script. 2159 */ 2160 static char_u * 2161 eval_next_line(evalarg_T *evalarg) 2162 { 2163 garray_T *gap = &evalarg->eval_ga; 2164 char_u *line; 2165 2166 if (evalarg->eval_cookie != NULL) 2167 line = evalarg->eval_getline(0, evalarg->eval_cookie, 0, 2168 GETLINE_CONCAT_ALL); 2169 else 2170 line = next_line_from_context(evalarg->eval_cctx, TRUE); 2171 ++evalarg->eval_break_count; 2172 if (gap->ga_itemsize > 0 && ga_grow(gap, 1) == OK) 2173 { 2174 char_u *p = skipwhite(line); 2175 2176 // Going to concatenate the lines after parsing. For an empty or 2177 // comment line use an empty string. 2178 if (*p == NUL || vim9_comment_start(p)) 2179 { 2180 vim_free(line); 2181 line = vim_strsave((char_u *)""); 2182 } 2183 2184 ((char_u **)gap->ga_data)[gap->ga_len] = line; 2185 ++gap->ga_len; 2186 } 2187 else if (evalarg->eval_cookie != NULL) 2188 { 2189 vim_free(evalarg->eval_tofree); 2190 evalarg->eval_tofree = line; 2191 } 2192 2193 // Advanced to the next line, "arg" no longer points into the previous 2194 // line. 2195 VIM_CLEAR(evalarg->eval_tofree_cmdline); 2196 2197 return skipwhite(line); 2198 } 2199 2200 /* 2201 * Call eval_next_non_blank() and get the next line if needed. 2202 */ 2203 char_u * 2204 skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg) 2205 { 2206 int getnext; 2207 char_u *p = skipwhite(arg); 2208 2209 if (evalarg == NULL) 2210 return skipwhite(arg); 2211 eval_next_non_blank(p, evalarg, &getnext); 2212 if (getnext) 2213 return eval_next_line(evalarg); 2214 return p; 2215 } 2216 2217 /* 2218 * After using "evalarg" filled from "eap": free the memory. 2219 */ 2220 void 2221 clear_evalarg(evalarg_T *evalarg, exarg_T *eap) 2222 { 2223 if (evalarg != NULL) 2224 { 2225 if (evalarg->eval_tofree != NULL) 2226 { 2227 if (eap != NULL) 2228 { 2229 // We may need to keep the original command line, e.g. for 2230 // ":let" it has the variable names. But we may also need the 2231 // new one, "nextcmd" points into it. Keep both. 2232 vim_free(eap->cmdline_tofree); 2233 eap->cmdline_tofree = *eap->cmdlinep; 2234 *eap->cmdlinep = evalarg->eval_tofree; 2235 } 2236 else 2237 vim_free(evalarg->eval_tofree); 2238 evalarg->eval_tofree = NULL; 2239 } 2240 2241 VIM_CLEAR(evalarg->eval_tofree_cmdline); 2242 VIM_CLEAR(evalarg->eval_tofree_lambda); 2243 } 2244 } 2245 2246 /* 2247 * The "evaluate" argument: When FALSE, the argument is only parsed but not 2248 * executed. The function may return OK, but the rettv will be of type 2249 * VAR_UNKNOWN. The function still returns FAIL for a syntax error. 2250 */ 2251 2252 /* 2253 * Handle zero level expression. 2254 * This calls eval1() and handles error message and nextcmd. 2255 * Put the result in "rettv" when returning OK and "evaluate" is TRUE. 2256 * Note: "rettv.v_lock" is not set. 2257 * "evalarg" can be NULL, EVALARG_EVALUATE or a pointer. 2258 * Return OK or FAIL. 2259 */ 2260 int 2261 eval0( 2262 char_u *arg, 2263 typval_T *rettv, 2264 exarg_T *eap, 2265 evalarg_T *evalarg) 2266 { 2267 int ret; 2268 char_u *p; 2269 int did_emsg_before = did_emsg; 2270 int called_emsg_before = called_emsg; 2271 int flags = evalarg == NULL ? 0 : evalarg->eval_flags; 2272 int end_error = FALSE; 2273 2274 p = skipwhite(arg); 2275 ret = eval1(&p, rettv, evalarg); 2276 p = skipwhite(p); 2277 2278 if (ret != FAIL) 2279 end_error = !ends_excmd2(arg, p); 2280 if (ret == FAIL || end_error) 2281 { 2282 if (ret != FAIL) 2283 clear_tv(rettv); 2284 /* 2285 * Report the invalid expression unless the expression evaluation has 2286 * been cancelled due to an aborting error, an interrupt, or an 2287 * exception, or we already gave a more specific error. 2288 * Also check called_emsg for when using assert_fails(). 2289 */ 2290 if (!aborting() 2291 && did_emsg == did_emsg_before 2292 && called_emsg == called_emsg_before 2293 && (flags & EVAL_CONSTANT) == 0 2294 && (!in_vim9script() || !vim9_bad_comment(p))) 2295 { 2296 if (end_error) 2297 semsg(_(e_trailing_arg), p); 2298 else 2299 semsg(_(e_invalid_expression_str), arg); 2300 } 2301 2302 // Some of the expression may not have been consumed. Do not check for 2303 // a next command to avoid more errors, unless "|" is following, which 2304 // could only be a command separator. 2305 if (eap != NULL && skipwhite(p)[0] == '|' && skipwhite(p)[1] != '|') 2306 eap->nextcmd = check_nextcmd(p); 2307 return FAIL; 2308 } 2309 2310 if (eap != NULL) 2311 eap->nextcmd = check_nextcmd(p); 2312 2313 return ret; 2314 } 2315 2316 /* 2317 * Handle top level expression: 2318 * expr2 ? expr1 : expr1 2319 * expr2 ?? expr1 2320 * 2321 * "arg" must point to the first non-white of the expression. 2322 * "arg" is advanced to just after the recognized expression. 2323 * 2324 * Note: "rettv.v_lock" is not set. 2325 * 2326 * Return OK or FAIL. 2327 */ 2328 int 2329 eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg) 2330 { 2331 char_u *p; 2332 int getnext; 2333 2334 CLEAR_POINTER(rettv); 2335 2336 /* 2337 * Get the first variable. 2338 */ 2339 if (eval2(arg, rettv, evalarg) == FAIL) 2340 return FAIL; 2341 2342 p = eval_next_non_blank(*arg, evalarg, &getnext); 2343 if (*p == '?') 2344 { 2345 int op_falsy = p[1] == '?'; 2346 int result; 2347 typval_T var2; 2348 evalarg_T *evalarg_used = evalarg; 2349 evalarg_T local_evalarg; 2350 int orig_flags; 2351 int evaluate; 2352 int vim9script = in_vim9script(); 2353 2354 if (evalarg == NULL) 2355 { 2356 CLEAR_FIELD(local_evalarg); 2357 evalarg_used = &local_evalarg; 2358 } 2359 orig_flags = evalarg_used->eval_flags; 2360 evaluate = evalarg_used->eval_flags & EVAL_EVALUATE; 2361 2362 if (getnext) 2363 *arg = eval_next_line(evalarg_used); 2364 else 2365 { 2366 if (evaluate && vim9script && !VIM_ISWHITE(p[-1])) 2367 { 2368 error_white_both(p, op_falsy ? 2 : 1); 2369 clear_tv(rettv); 2370 return FAIL; 2371 } 2372 *arg = p; 2373 } 2374 2375 result = FALSE; 2376 if (evaluate) 2377 { 2378 int error = FALSE; 2379 2380 if (op_falsy) 2381 result = tv2bool(rettv); 2382 else if (vim9script) 2383 result = tv_get_bool_chk(rettv, &error); 2384 else if (tv_get_number_chk(rettv, &error) != 0) 2385 result = TRUE; 2386 if (error || !op_falsy || !result) 2387 clear_tv(rettv); 2388 if (error) 2389 return FAIL; 2390 } 2391 2392 /* 2393 * Get the second variable. Recursive! 2394 */ 2395 if (op_falsy) 2396 ++*arg; 2397 if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[1])) 2398 { 2399 error_white_both(*arg - (op_falsy ? 1 : 0), op_falsy ? 2 : 1); 2400 clear_tv(rettv); 2401 return FAIL; 2402 } 2403 *arg = skipwhite_and_linebreak(*arg + 1, evalarg_used); 2404 evalarg_used->eval_flags = (op_falsy ? !result : result) 2405 ? orig_flags : orig_flags & ~EVAL_EVALUATE; 2406 if (eval1(arg, &var2, evalarg_used) == FAIL) 2407 { 2408 evalarg_used->eval_flags = orig_flags; 2409 return FAIL; 2410 } 2411 if (!op_falsy || !result) 2412 *rettv = var2; 2413 2414 if (!op_falsy) 2415 { 2416 /* 2417 * Check for the ":". 2418 */ 2419 p = eval_next_non_blank(*arg, evalarg_used, &getnext); 2420 if (*p != ':') 2421 { 2422 emsg(_(e_missing_colon)); 2423 if (evaluate && result) 2424 clear_tv(rettv); 2425 evalarg_used->eval_flags = orig_flags; 2426 return FAIL; 2427 } 2428 if (getnext) 2429 *arg = eval_next_line(evalarg_used); 2430 else 2431 { 2432 if (evaluate && vim9script && !VIM_ISWHITE(p[-1])) 2433 { 2434 error_white_both(p, 1); 2435 clear_tv(rettv); 2436 evalarg_used->eval_flags = orig_flags; 2437 return FAIL; 2438 } 2439 *arg = p; 2440 } 2441 2442 /* 2443 * Get the third variable. Recursive! 2444 */ 2445 if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[1])) 2446 { 2447 error_white_both(*arg, 1); 2448 clear_tv(rettv); 2449 evalarg_used->eval_flags = orig_flags; 2450 return FAIL; 2451 } 2452 *arg = skipwhite_and_linebreak(*arg + 1, evalarg_used); 2453 evalarg_used->eval_flags = !result ? orig_flags 2454 : orig_flags & ~EVAL_EVALUATE; 2455 if (eval1(arg, &var2, evalarg_used) == FAIL) 2456 { 2457 if (evaluate && result) 2458 clear_tv(rettv); 2459 evalarg_used->eval_flags = orig_flags; 2460 return FAIL; 2461 } 2462 if (evaluate && !result) 2463 *rettv = var2; 2464 } 2465 2466 if (evalarg == NULL) 2467 clear_evalarg(&local_evalarg, NULL); 2468 else 2469 evalarg->eval_flags = orig_flags; 2470 } 2471 2472 return OK; 2473 } 2474 2475 /* 2476 * Handle first level expression: 2477 * expr2 || expr2 || expr2 logical OR 2478 * 2479 * "arg" must point to the first non-white of the expression. 2480 * "arg" is advanced to just after the recognized expression. 2481 * 2482 * Return OK or FAIL. 2483 */ 2484 static int 2485 eval2(char_u **arg, typval_T *rettv, evalarg_T *evalarg) 2486 { 2487 char_u *p; 2488 int getnext; 2489 2490 /* 2491 * Get the first variable. 2492 */ 2493 if (eval3(arg, rettv, evalarg) == FAIL) 2494 return FAIL; 2495 2496 /* 2497 * Handle the "||" operator. 2498 */ 2499 p = eval_next_non_blank(*arg, evalarg, &getnext); 2500 if (p[0] == '|' && p[1] == '|') 2501 { 2502 evalarg_T *evalarg_used = evalarg; 2503 evalarg_T local_evalarg; 2504 int evaluate; 2505 int orig_flags; 2506 long result = FALSE; 2507 typval_T var2; 2508 int error = FALSE; 2509 int vim9script = in_vim9script(); 2510 2511 if (evalarg == NULL) 2512 { 2513 CLEAR_FIELD(local_evalarg); 2514 evalarg_used = &local_evalarg; 2515 } 2516 orig_flags = evalarg_used->eval_flags; 2517 evaluate = orig_flags & EVAL_EVALUATE; 2518 if (evaluate) 2519 { 2520 if (vim9script) 2521 result = tv_get_bool_chk(rettv, &error); 2522 else if (tv_get_number_chk(rettv, &error) != 0) 2523 result = TRUE; 2524 clear_tv(rettv); 2525 if (error) 2526 return FAIL; 2527 } 2528 2529 /* 2530 * Repeat until there is no following "||". 2531 */ 2532 while (p[0] == '|' && p[1] == '|') 2533 { 2534 if (getnext) 2535 *arg = eval_next_line(evalarg_used); 2536 else 2537 { 2538 if (evaluate && in_vim9script() && !VIM_ISWHITE(p[-1])) 2539 { 2540 error_white_both(p, 2); 2541 clear_tv(rettv); 2542 return FAIL; 2543 } 2544 *arg = p; 2545 } 2546 2547 /* 2548 * Get the second variable. 2549 */ 2550 if (evaluate && in_vim9script() && !IS_WHITE_OR_NUL((*arg)[2])) 2551 { 2552 error_white_both(*arg, 2); 2553 clear_tv(rettv); 2554 return FAIL; 2555 } 2556 *arg = skipwhite_and_linebreak(*arg + 2, evalarg_used); 2557 evalarg_used->eval_flags = !result ? orig_flags 2558 : orig_flags & ~EVAL_EVALUATE; 2559 if (eval3(arg, &var2, evalarg_used) == FAIL) 2560 return FAIL; 2561 2562 /* 2563 * Compute the result. 2564 */ 2565 if (evaluate && !result) 2566 { 2567 if (vim9script) 2568 result = tv_get_bool_chk(&var2, &error); 2569 else if (tv_get_number_chk(&var2, &error) != 0) 2570 result = TRUE; 2571 clear_tv(&var2); 2572 if (error) 2573 return FAIL; 2574 } 2575 if (evaluate) 2576 { 2577 if (vim9script) 2578 { 2579 rettv->v_type = VAR_BOOL; 2580 rettv->vval.v_number = result ? VVAL_TRUE : VVAL_FALSE; 2581 } 2582 else 2583 { 2584 rettv->v_type = VAR_NUMBER; 2585 rettv->vval.v_number = result; 2586 } 2587 } 2588 2589 p = eval_next_non_blank(*arg, evalarg_used, &getnext); 2590 } 2591 2592 if (evalarg == NULL) 2593 clear_evalarg(&local_evalarg, NULL); 2594 else 2595 evalarg->eval_flags = orig_flags; 2596 } 2597 2598 return OK; 2599 } 2600 2601 /* 2602 * Handle second level expression: 2603 * expr3 && expr3 && expr3 logical AND 2604 * 2605 * "arg" must point to the first non-white of the expression. 2606 * "arg" is advanced to just after the recognized expression. 2607 * 2608 * Return OK or FAIL. 2609 */ 2610 static int 2611 eval3(char_u **arg, typval_T *rettv, evalarg_T *evalarg) 2612 { 2613 char_u *p; 2614 int getnext; 2615 2616 /* 2617 * Get the first variable. 2618 */ 2619 if (eval4(arg, rettv, evalarg) == FAIL) 2620 return FAIL; 2621 2622 /* 2623 * Handle the "&&" operator. 2624 */ 2625 p = eval_next_non_blank(*arg, evalarg, &getnext); 2626 if (p[0] == '&' && p[1] == '&') 2627 { 2628 evalarg_T *evalarg_used = evalarg; 2629 evalarg_T local_evalarg; 2630 int orig_flags; 2631 int evaluate; 2632 long result = TRUE; 2633 typval_T var2; 2634 int error = FALSE; 2635 int vim9script = in_vim9script(); 2636 2637 if (evalarg == NULL) 2638 { 2639 CLEAR_FIELD(local_evalarg); 2640 evalarg_used = &local_evalarg; 2641 } 2642 orig_flags = evalarg_used->eval_flags; 2643 evaluate = orig_flags & EVAL_EVALUATE; 2644 if (evaluate) 2645 { 2646 if (vim9script) 2647 result = tv_get_bool_chk(rettv, &error); 2648 else if (tv_get_number_chk(rettv, &error) == 0) 2649 result = FALSE; 2650 clear_tv(rettv); 2651 if (error) 2652 return FAIL; 2653 } 2654 2655 /* 2656 * Repeat until there is no following "&&". 2657 */ 2658 while (p[0] == '&' && p[1] == '&') 2659 { 2660 if (getnext) 2661 *arg = eval_next_line(evalarg_used); 2662 else 2663 { 2664 if (evaluate && vim9script && !VIM_ISWHITE(p[-1])) 2665 { 2666 error_white_both(p, 2); 2667 clear_tv(rettv); 2668 return FAIL; 2669 } 2670 *arg = p; 2671 } 2672 2673 /* 2674 * Get the second variable. 2675 */ 2676 if (evaluate && in_vim9script() && !IS_WHITE_OR_NUL((*arg)[2])) 2677 { 2678 error_white_both(*arg, 2); 2679 clear_tv(rettv); 2680 return FAIL; 2681 } 2682 *arg = skipwhite_and_linebreak(*arg + 2, evalarg_used); 2683 evalarg_used->eval_flags = result ? orig_flags 2684 : orig_flags & ~EVAL_EVALUATE; 2685 CLEAR_FIELD(var2); 2686 if (eval4(arg, &var2, evalarg_used) == FAIL) 2687 return FAIL; 2688 2689 /* 2690 * Compute the result. 2691 */ 2692 if (evaluate && result) 2693 { 2694 if (vim9script) 2695 result = tv_get_bool_chk(&var2, &error); 2696 else if (tv_get_number_chk(&var2, &error) == 0) 2697 result = FALSE; 2698 clear_tv(&var2); 2699 if (error) 2700 return FAIL; 2701 } 2702 if (evaluate) 2703 { 2704 if (vim9script) 2705 { 2706 rettv->v_type = VAR_BOOL; 2707 rettv->vval.v_number = result ? VVAL_TRUE : VVAL_FALSE; 2708 } 2709 else 2710 { 2711 rettv->v_type = VAR_NUMBER; 2712 rettv->vval.v_number = result; 2713 } 2714 } 2715 2716 p = eval_next_non_blank(*arg, evalarg_used, &getnext); 2717 } 2718 2719 if (evalarg == NULL) 2720 clear_evalarg(&local_evalarg, NULL); 2721 else 2722 evalarg->eval_flags = orig_flags; 2723 } 2724 2725 return OK; 2726 } 2727 2728 /* 2729 * Handle third level expression: 2730 * var1 == var2 2731 * var1 =~ var2 2732 * var1 != var2 2733 * var1 !~ var2 2734 * var1 > var2 2735 * var1 >= var2 2736 * var1 < var2 2737 * var1 <= var2 2738 * var1 is var2 2739 * var1 isnot var2 2740 * 2741 * "arg" must point to the first non-white of the expression. 2742 * "arg" is advanced to just after the recognized expression. 2743 * 2744 * Return OK or FAIL. 2745 */ 2746 static int 2747 eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg) 2748 { 2749 char_u *p; 2750 int getnext; 2751 exprtype_T type = EXPR_UNKNOWN; 2752 int len = 2; 2753 int type_is = FALSE; 2754 2755 /* 2756 * Get the first variable. 2757 */ 2758 if (eval5(arg, rettv, evalarg) == FAIL) 2759 return FAIL; 2760 2761 p = eval_next_non_blank(*arg, evalarg, &getnext); 2762 type = get_compare_type(p, &len, &type_is); 2763 2764 /* 2765 * If there is a comparative operator, use it. 2766 */ 2767 if (type != EXPR_UNKNOWN) 2768 { 2769 typval_T var2; 2770 int ic; 2771 int vim9script = in_vim9script(); 2772 int evaluate = evalarg == NULL 2773 ? 0 : (evalarg->eval_flags & EVAL_EVALUATE); 2774 2775 if (getnext) 2776 { 2777 *arg = eval_next_line(evalarg); 2778 p = *arg; 2779 } 2780 else if (evaluate && vim9script && !VIM_ISWHITE(**arg)) 2781 { 2782 error_white_both(*arg, len); 2783 clear_tv(rettv); 2784 return FAIL; 2785 } 2786 2787 if (vim9script && type_is && (p[len] == '?' || p[len] == '#')) 2788 { 2789 semsg(_(e_invalid_expression_str), p); 2790 clear_tv(rettv); 2791 return FAIL; 2792 } 2793 2794 // extra question mark appended: ignore case 2795 if (p[len] == '?') 2796 { 2797 ic = TRUE; 2798 ++len; 2799 } 2800 // extra '#' appended: match case 2801 else if (p[len] == '#') 2802 { 2803 ic = FALSE; 2804 ++len; 2805 } 2806 // nothing appended: use 'ignorecase' if not in Vim script 2807 else 2808 ic = vim9script ? FALSE : p_ic; 2809 2810 /* 2811 * Get the second variable. 2812 */ 2813 if (evaluate && vim9script && !IS_WHITE_OR_NUL(p[len])) 2814 { 2815 error_white_both(p, len); 2816 clear_tv(rettv); 2817 return FAIL; 2818 } 2819 *arg = skipwhite_and_linebreak(p + len, evalarg); 2820 if (eval5(arg, &var2, evalarg) == FAIL) 2821 { 2822 clear_tv(rettv); 2823 return FAIL; 2824 } 2825 if (evaluate) 2826 { 2827 int ret; 2828 2829 if (vim9script && check_compare_types(type, rettv, &var2) == FAIL) 2830 { 2831 ret = FAIL; 2832 clear_tv(rettv); 2833 } 2834 else 2835 ret = typval_compare(rettv, &var2, type, ic); 2836 clear_tv(&var2); 2837 return ret; 2838 } 2839 } 2840 2841 return OK; 2842 } 2843 2844 /* 2845 * Make a copy of blob "tv1" and append blob "tv2". 2846 */ 2847 void 2848 eval_addblob(typval_T *tv1, typval_T *tv2) 2849 { 2850 blob_T *b1 = tv1->vval.v_blob; 2851 blob_T *b2 = tv2->vval.v_blob; 2852 blob_T *b = blob_alloc(); 2853 int i; 2854 2855 if (b != NULL) 2856 { 2857 for (i = 0; i < blob_len(b1); i++) 2858 ga_append(&b->bv_ga, blob_get(b1, i)); 2859 for (i = 0; i < blob_len(b2); i++) 2860 ga_append(&b->bv_ga, blob_get(b2, i)); 2861 2862 clear_tv(tv1); 2863 rettv_blob_set(tv1, b); 2864 } 2865 } 2866 2867 /* 2868 * Make a copy of list "tv1" and append list "tv2". 2869 */ 2870 int 2871 eval_addlist(typval_T *tv1, typval_T *tv2) 2872 { 2873 typval_T var3; 2874 2875 // concatenate Lists 2876 if (list_concat(tv1->vval.v_list, tv2->vval.v_list, &var3) == FAIL) 2877 { 2878 clear_tv(tv1); 2879 clear_tv(tv2); 2880 return FAIL; 2881 } 2882 clear_tv(tv1); 2883 *tv1 = var3; 2884 return OK; 2885 } 2886 2887 /* 2888 * Handle fourth level expression: 2889 * + number addition 2890 * - number subtraction 2891 * . string concatenation (if script version is 1) 2892 * .. string concatenation 2893 * 2894 * "arg" must point to the first non-white of the expression. 2895 * "arg" is advanced to just after the recognized expression. 2896 * 2897 * Return OK or FAIL. 2898 */ 2899 static int 2900 eval5(char_u **arg, typval_T *rettv, evalarg_T *evalarg) 2901 { 2902 /* 2903 * Get the first variable. 2904 */ 2905 if (eval6(arg, rettv, evalarg, FALSE) == FAIL) 2906 return FAIL; 2907 2908 /* 2909 * Repeat computing, until no '+', '-' or '.' is following. 2910 */ 2911 for (;;) 2912 { 2913 int evaluate; 2914 int getnext; 2915 char_u *p; 2916 int op; 2917 int oplen; 2918 int concat; 2919 typval_T var2; 2920 int vim9script = in_vim9script(); 2921 2922 // "." is only string concatenation when scriptversion is 1 2923 // "+=", "-=" and "..=" are assignments 2924 // "++" and "--" on the next line are a separate command. 2925 p = eval_next_non_blank(*arg, evalarg, &getnext); 2926 op = *p; 2927 concat = op == '.' && (*(p + 1) == '.' || current_sctx.sc_version < 2); 2928 if ((op != '+' && op != '-' && !concat) || p[1] == '=' 2929 || (p[1] == '.' && p[2] == '=')) 2930 break; 2931 if (getnext && (op == '+' || op == '-') && p[0] == p[1]) 2932 break; 2933 2934 evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE); 2935 oplen = (concat && p[1] == '.') ? 2 : 1; 2936 if (getnext) 2937 *arg = eval_next_line(evalarg); 2938 else 2939 { 2940 if (evaluate && vim9script && !VIM_ISWHITE(**arg)) 2941 { 2942 error_white_both(*arg, oplen); 2943 clear_tv(rettv); 2944 return FAIL; 2945 } 2946 *arg = p; 2947 } 2948 if ((op != '+' || (rettv->v_type != VAR_LIST 2949 && rettv->v_type != VAR_BLOB)) 2950 #ifdef FEAT_FLOAT 2951 && (op == '.' || rettv->v_type != VAR_FLOAT) 2952 #endif 2953 && evaluate) 2954 { 2955 int error = FALSE; 2956 2957 // For "list + ...", an illegal use of the first operand as 2958 // a number cannot be determined before evaluating the 2nd 2959 // operand: if this is also a list, all is ok. 2960 // For "something . ...", "something - ..." or "non-list + ...", 2961 // we know that the first operand needs to be a string or number 2962 // without evaluating the 2nd operand. So check before to avoid 2963 // side effects after an error. 2964 if (op != '.') 2965 tv_get_number_chk(rettv, &error); 2966 if ((op == '.' && tv_get_string_chk(rettv) == NULL) || error) 2967 { 2968 clear_tv(rettv); 2969 return FAIL; 2970 } 2971 } 2972 2973 /* 2974 * Get the second variable. 2975 */ 2976 if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[oplen])) 2977 { 2978 error_white_both(*arg, oplen); 2979 clear_tv(rettv); 2980 return FAIL; 2981 } 2982 *arg = skipwhite_and_linebreak(*arg + oplen, evalarg); 2983 if (eval6(arg, &var2, evalarg, !vim9script && op == '.') == FAIL) 2984 { 2985 clear_tv(rettv); 2986 return FAIL; 2987 } 2988 2989 if (evaluate) 2990 { 2991 /* 2992 * Compute the result. 2993 */ 2994 if (op == '.') 2995 { 2996 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 2997 char_u *s1 = tv_get_string_buf(rettv, buf1); 2998 char_u *s2 = NULL; 2999 3000 if (vim9script && (var2.v_type == VAR_VOID 3001 || var2.v_type == VAR_CHANNEL 3002 || var2.v_type == VAR_JOB)) 3003 semsg(_(e_using_invalid_value_as_string_str), 3004 vartype_name(var2.v_type)); 3005 #ifdef FEAT_FLOAT 3006 else if (vim9script && var2.v_type == VAR_FLOAT) 3007 { 3008 vim_snprintf((char *)buf2, NUMBUFLEN, "%g", 3009 var2.vval.v_float); 3010 s2 = buf2; 3011 } 3012 #endif 3013 else 3014 s2 = tv_get_string_buf_chk(&var2, buf2); 3015 if (s2 == NULL) // type error ? 3016 { 3017 clear_tv(rettv); 3018 clear_tv(&var2); 3019 return FAIL; 3020 } 3021 p = concat_str(s1, s2); 3022 clear_tv(rettv); 3023 rettv->v_type = VAR_STRING; 3024 rettv->vval.v_string = p; 3025 } 3026 else if (op == '+' && rettv->v_type == VAR_BLOB 3027 && var2.v_type == VAR_BLOB) 3028 eval_addblob(rettv, &var2); 3029 else if (op == '+' && rettv->v_type == VAR_LIST 3030 && var2.v_type == VAR_LIST) 3031 { 3032 if (eval_addlist(rettv, &var2) == FAIL) 3033 return FAIL; 3034 } 3035 else 3036 { 3037 int error = FALSE; 3038 varnumber_T n1, n2; 3039 #ifdef FEAT_FLOAT 3040 float_T f1 = 0, f2 = 0; 3041 3042 if (rettv->v_type == VAR_FLOAT) 3043 { 3044 f1 = rettv->vval.v_float; 3045 n1 = 0; 3046 } 3047 else 3048 #endif 3049 { 3050 n1 = tv_get_number_chk(rettv, &error); 3051 if (error) 3052 { 3053 // This can only happen for "list + non-list" or 3054 // "blob + non-blob". For "non-list + ..." or 3055 // "something - ...", we returned before evaluating the 3056 // 2nd operand. 3057 clear_tv(rettv); 3058 clear_tv(&var2); 3059 return FAIL; 3060 } 3061 #ifdef FEAT_FLOAT 3062 if (var2.v_type == VAR_FLOAT) 3063 f1 = n1; 3064 #endif 3065 } 3066 #ifdef FEAT_FLOAT 3067 if (var2.v_type == VAR_FLOAT) 3068 { 3069 f2 = var2.vval.v_float; 3070 n2 = 0; 3071 } 3072 else 3073 #endif 3074 { 3075 n2 = tv_get_number_chk(&var2, &error); 3076 if (error) 3077 { 3078 clear_tv(rettv); 3079 clear_tv(&var2); 3080 return FAIL; 3081 } 3082 #ifdef FEAT_FLOAT 3083 if (rettv->v_type == VAR_FLOAT) 3084 f2 = n2; 3085 #endif 3086 } 3087 clear_tv(rettv); 3088 3089 #ifdef FEAT_FLOAT 3090 // If there is a float on either side the result is a float. 3091 if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT) 3092 { 3093 if (op == '+') 3094 f1 = f1 + f2; 3095 else 3096 f1 = f1 - f2; 3097 rettv->v_type = VAR_FLOAT; 3098 rettv->vval.v_float = f1; 3099 } 3100 else 3101 #endif 3102 { 3103 if (op == '+') 3104 n1 = n1 + n2; 3105 else 3106 n1 = n1 - n2; 3107 rettv->v_type = VAR_NUMBER; 3108 rettv->vval.v_number = n1; 3109 } 3110 } 3111 clear_tv(&var2); 3112 } 3113 } 3114 return OK; 3115 } 3116 3117 /* 3118 * Handle fifth level expression: 3119 * * number multiplication 3120 * / number division 3121 * % number modulo 3122 * 3123 * "arg" must point to the first non-white of the expression. 3124 * "arg" is advanced to just after the recognized expression. 3125 * 3126 * Return OK or FAIL. 3127 */ 3128 static int 3129 eval6( 3130 char_u **arg, 3131 typval_T *rettv, 3132 evalarg_T *evalarg, 3133 int want_string) // after "." operator 3134 { 3135 #ifdef FEAT_FLOAT 3136 int use_float = FALSE; 3137 #endif 3138 3139 /* 3140 * Get the first variable. 3141 */ 3142 if (eval7t(arg, rettv, evalarg, want_string) == FAIL) 3143 return FAIL; 3144 3145 /* 3146 * Repeat computing, until no '*', '/' or '%' is following. 3147 */ 3148 for (;;) 3149 { 3150 int evaluate; 3151 int getnext; 3152 typval_T var2; 3153 char_u *p; 3154 int op; 3155 varnumber_T n1, n2; 3156 #ifdef FEAT_FLOAT 3157 float_T f1, f2; 3158 #endif 3159 int error; 3160 3161 // "*=", "/=" and "%=" are assignments 3162 p = eval_next_non_blank(*arg, evalarg, &getnext); 3163 op = *p; 3164 if ((op != '*' && op != '/' && op != '%') || p[1] == '=') 3165 break; 3166 3167 evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE); 3168 if (getnext) 3169 *arg = eval_next_line(evalarg); 3170 else 3171 { 3172 if (evaluate && in_vim9script() && !VIM_ISWHITE(**arg)) 3173 { 3174 error_white_both(*arg, 1); 3175 clear_tv(rettv); 3176 return FAIL; 3177 } 3178 *arg = p; 3179 } 3180 3181 #ifdef FEAT_FLOAT 3182 f1 = 0; 3183 f2 = 0; 3184 #endif 3185 error = FALSE; 3186 if (evaluate) 3187 { 3188 #ifdef FEAT_FLOAT 3189 if (rettv->v_type == VAR_FLOAT) 3190 { 3191 f1 = rettv->vval.v_float; 3192 use_float = TRUE; 3193 n1 = 0; 3194 } 3195 else 3196 #endif 3197 n1 = tv_get_number_chk(rettv, &error); 3198 clear_tv(rettv); 3199 if (error) 3200 return FAIL; 3201 } 3202 else 3203 n1 = 0; 3204 3205 /* 3206 * Get the second variable. 3207 */ 3208 if (evaluate && in_vim9script() && !IS_WHITE_OR_NUL((*arg)[1])) 3209 { 3210 error_white_both(*arg, 1); 3211 clear_tv(rettv); 3212 return FAIL; 3213 } 3214 *arg = skipwhite_and_linebreak(*arg + 1, evalarg); 3215 if (eval7t(arg, &var2, evalarg, FALSE) == FAIL) 3216 return FAIL; 3217 3218 if (evaluate) 3219 { 3220 #ifdef FEAT_FLOAT 3221 if (var2.v_type == VAR_FLOAT) 3222 { 3223 if (!use_float) 3224 { 3225 f1 = n1; 3226 use_float = TRUE; 3227 } 3228 f2 = var2.vval.v_float; 3229 n2 = 0; 3230 } 3231 else 3232 #endif 3233 { 3234 n2 = tv_get_number_chk(&var2, &error); 3235 clear_tv(&var2); 3236 if (error) 3237 return FAIL; 3238 #ifdef FEAT_FLOAT 3239 if (use_float) 3240 f2 = n2; 3241 #endif 3242 } 3243 3244 /* 3245 * Compute the result. 3246 * When either side is a float the result is a float. 3247 */ 3248 #ifdef FEAT_FLOAT 3249 if (use_float) 3250 { 3251 if (op == '*') 3252 f1 = f1 * f2; 3253 else if (op == '/') 3254 { 3255 # ifdef VMS 3256 // VMS crashes on divide by zero, work around it 3257 if (f2 == 0.0) 3258 { 3259 if (f1 == 0) 3260 f1 = -1 * __F_FLT_MAX - 1L; // similar to NaN 3261 else if (f1 < 0) 3262 f1 = -1 * __F_FLT_MAX; 3263 else 3264 f1 = __F_FLT_MAX; 3265 } 3266 else 3267 f1 = f1 / f2; 3268 # else 3269 // We rely on the floating point library to handle divide 3270 // by zero to result in "inf" and not a crash. 3271 f1 = f1 / f2; 3272 # endif 3273 } 3274 else 3275 { 3276 emsg(_(e_modulus)); 3277 return FAIL; 3278 } 3279 rettv->v_type = VAR_FLOAT; 3280 rettv->vval.v_float = f1; 3281 } 3282 else 3283 #endif 3284 { 3285 int failed = FALSE; 3286 3287 if (op == '*') 3288 n1 = n1 * n2; 3289 else if (op == '/') 3290 n1 = num_divide(n1, n2, &failed); 3291 else 3292 n1 = num_modulus(n1, n2, &failed); 3293 if (failed) 3294 return FAIL; 3295 3296 rettv->v_type = VAR_NUMBER; 3297 rettv->vval.v_number = n1; 3298 } 3299 } 3300 } 3301 3302 return OK; 3303 } 3304 3305 /* 3306 * Handle a type cast before a base level expression. 3307 * "arg" must point to the first non-white of the expression. 3308 * "arg" is advanced to just after the recognized expression. 3309 * Return OK or FAIL. 3310 */ 3311 static int 3312 eval7t( 3313 char_u **arg, 3314 typval_T *rettv, 3315 evalarg_T *evalarg, 3316 int want_string) // after "." operator 3317 { 3318 type_T *want_type = NULL; 3319 garray_T type_list; // list of pointers to allocated types 3320 int res; 3321 int evaluate = evalarg == NULL ? 0 3322 : (evalarg->eval_flags & EVAL_EVALUATE); 3323 3324 // Recognize <type> in Vim9 script only. 3325 if (in_vim9script() && **arg == '<' && eval_isnamec1((*arg)[1])) 3326 { 3327 ++*arg; 3328 ga_init2(&type_list, sizeof(type_T *), 10); 3329 want_type = parse_type(arg, &type_list, TRUE); 3330 if (want_type == NULL && (evaluate || **arg != '>')) 3331 { 3332 clear_type_list(&type_list); 3333 return FAIL; 3334 } 3335 3336 if (**arg != '>') 3337 { 3338 if (*skipwhite(*arg) == '>') 3339 semsg(_(e_no_white_space_allowed_before_str_str), ">", *arg); 3340 else 3341 emsg(_(e_missing_gt)); 3342 clear_type_list(&type_list); 3343 return FAIL; 3344 } 3345 ++*arg; 3346 *arg = skipwhite_and_linebreak(*arg, evalarg); 3347 } 3348 3349 res = eval7(arg, rettv, evalarg, want_string); 3350 3351 if (want_type != NULL && evaluate) 3352 { 3353 if (res == OK) 3354 { 3355 type_T *actual = typval2type(rettv, get_copyID(), &type_list, TRUE); 3356 3357 if (!equal_type(want_type, actual)) 3358 { 3359 if (want_type == &t_bool && actual != &t_bool 3360 && (actual->tt_flags & TTFLAG_BOOL_OK)) 3361 { 3362 int n = tv2bool(rettv); 3363 3364 // can use "0" and "1" for boolean in some places 3365 clear_tv(rettv); 3366 rettv->v_type = VAR_BOOL; 3367 rettv->vval.v_number = n ? VVAL_TRUE : VVAL_FALSE; 3368 } 3369 else 3370 { 3371 where_T where = WHERE_INIT; 3372 3373 where.wt_variable = TRUE; 3374 res = check_type(want_type, actual, TRUE, where); 3375 } 3376 } 3377 } 3378 clear_type_list(&type_list); 3379 } 3380 3381 return res; 3382 } 3383 3384 int 3385 eval_leader(char_u **arg, int vim9) 3386 { 3387 char_u *s = *arg; 3388 char_u *p = *arg; 3389 3390 while (*p == '!' || *p == '-' || *p == '+') 3391 { 3392 char_u *n = skipwhite(p + 1); 3393 3394 // ++, --, -+ and +- are not accepted in Vim9 script 3395 if (vim9 && (*p == '-' || *p == '+') && (*n == '-' || *n == '+')) 3396 { 3397 semsg(_(e_invalid_expression_str), s); 3398 return FAIL; 3399 } 3400 p = n; 3401 } 3402 *arg = p; 3403 return OK; 3404 } 3405 3406 /* 3407 * Handle sixth level expression: 3408 * number number constant 3409 * 0zFFFFFFFF Blob constant 3410 * "string" string constant 3411 * 'string' literal string constant 3412 * &option-name option value 3413 * @r register contents 3414 * identifier variable value 3415 * function() function call 3416 * $VAR environment variable 3417 * (expression) nested expression 3418 * [expr, expr] List 3419 * {arg, arg -> expr} Lambda 3420 * {key: val, key: val} Dictionary 3421 * #{key: val, key: val} Dictionary with literal keys 3422 * 3423 * Also handle: 3424 * ! in front logical NOT 3425 * - in front unary minus 3426 * + in front unary plus (ignored) 3427 * trailing [] subscript in String or List 3428 * trailing .name entry in Dictionary 3429 * trailing ->name() method call 3430 * 3431 * "arg" must point to the first non-white of the expression. 3432 * "arg" is advanced to just after the recognized expression. 3433 * 3434 * Return OK or FAIL. 3435 */ 3436 static int 3437 eval7( 3438 char_u **arg, 3439 typval_T *rettv, 3440 evalarg_T *evalarg, 3441 int want_string) // after "." operator 3442 { 3443 int evaluate = evalarg != NULL 3444 && (evalarg->eval_flags & EVAL_EVALUATE); 3445 int len; 3446 char_u *s; 3447 char_u *start_leader, *end_leader; 3448 int ret = OK; 3449 char_u *alias; 3450 3451 /* 3452 * Initialise variable so that clear_tv() can't mistake this for a 3453 * string and free a string that isn't there. 3454 */ 3455 rettv->v_type = VAR_UNKNOWN; 3456 3457 /* 3458 * Skip '!', '-' and '+' characters. They are handled later. 3459 */ 3460 start_leader = *arg; 3461 if (eval_leader(arg, in_vim9script()) == FAIL) 3462 return FAIL; 3463 end_leader = *arg; 3464 3465 if (**arg == '.' && (!isdigit(*(*arg + 1)) 3466 #ifdef FEAT_FLOAT 3467 || current_sctx.sc_version < 2 3468 #endif 3469 )) 3470 { 3471 semsg(_(e_invalid_expression_str), *arg); 3472 ++*arg; 3473 return FAIL; 3474 } 3475 3476 switch (**arg) 3477 { 3478 /* 3479 * Number constant. 3480 */ 3481 case '0': 3482 case '1': 3483 case '2': 3484 case '3': 3485 case '4': 3486 case '5': 3487 case '6': 3488 case '7': 3489 case '8': 3490 case '9': 3491 case '.': ret = eval_number(arg, rettv, evaluate, want_string); 3492 3493 // Apply prefixed "-" and "+" now. Matters especially when 3494 // "->" follows. 3495 if (ret == OK && evaluate && end_leader > start_leader 3496 && rettv->v_type != VAR_BLOB) 3497 ret = eval7_leader(rettv, TRUE, start_leader, &end_leader); 3498 break; 3499 3500 /* 3501 * String constant: "string". 3502 */ 3503 case '"': ret = eval_string(arg, rettv, evaluate); 3504 break; 3505 3506 /* 3507 * Literal string constant: 'str''ing'. 3508 */ 3509 case '\'': ret = eval_lit_string(arg, rettv, evaluate); 3510 break; 3511 3512 /* 3513 * List: [expr, expr] 3514 */ 3515 case '[': ret = eval_list(arg, rettv, evalarg, TRUE); 3516 break; 3517 3518 /* 3519 * Dictionary: #{key: val, key: val} 3520 */ 3521 case '#': if (in_vim9script()) 3522 { 3523 ret = vim9_bad_comment(*arg) ? FAIL : NOTDONE; 3524 } 3525 else if ((*arg)[1] == '{') 3526 { 3527 ++*arg; 3528 ret = eval_dict(arg, rettv, evalarg, TRUE); 3529 } 3530 else 3531 ret = NOTDONE; 3532 break; 3533 3534 /* 3535 * Lambda: {arg, arg -> expr} 3536 * Dictionary: {'key': val, 'key': val} 3537 */ 3538 case '{': if (in_vim9script()) 3539 ret = NOTDONE; 3540 else 3541 ret = get_lambda_tv(arg, rettv, in_vim9script(), evalarg); 3542 if (ret == NOTDONE) 3543 ret = eval_dict(arg, rettv, evalarg, FALSE); 3544 break; 3545 3546 /* 3547 * Option value: &name 3548 */ 3549 case '&': ret = eval_option(arg, rettv, evaluate); 3550 break; 3551 3552 /* 3553 * Environment variable: $VAR. 3554 */ 3555 case '$': ret = eval_env_var(arg, rettv, evaluate); 3556 break; 3557 3558 /* 3559 * Register contents: @r. 3560 */ 3561 case '@': ++*arg; 3562 if (evaluate) 3563 { 3564 if (in_vim9script() && IS_WHITE_OR_NUL(**arg)) 3565 semsg(_(e_syntax_error_at_str), *arg); 3566 else if (in_vim9script() && !valid_yank_reg(**arg, FALSE)) 3567 emsg_invreg(**arg); 3568 else 3569 { 3570 rettv->v_type = VAR_STRING; 3571 rettv->vval.v_string = get_reg_contents(**arg, 3572 GREG_EXPR_SRC); 3573 } 3574 } 3575 if (**arg != NUL) 3576 ++*arg; 3577 break; 3578 3579 /* 3580 * nested expression: (expression). 3581 * or lambda: (arg) => expr 3582 */ 3583 case '(': ret = NOTDONE; 3584 if (in_vim9script()) 3585 { 3586 ret = get_lambda_tv(arg, rettv, TRUE, evalarg); 3587 if (ret == OK && evaluate) 3588 { 3589 ufunc_T *ufunc = rettv->vval.v_partial->pt_func; 3590 3591 // Compile it here to get the return type. The return 3592 // type is optional, when it's missing use t_unknown. 3593 // This is recognized in compile_return(). 3594 if (ufunc->uf_ret_type->tt_type == VAR_VOID) 3595 ufunc->uf_ret_type = &t_unknown; 3596 if (compile_def_function(ufunc, 3597 FALSE, COMPILE_TYPE(ufunc), NULL) == FAIL) 3598 { 3599 clear_tv(rettv); 3600 ret = FAIL; 3601 } 3602 } 3603 } 3604 if (ret == NOTDONE) 3605 { 3606 *arg = skipwhite_and_linebreak(*arg + 1, evalarg); 3607 ret = eval1(arg, rettv, evalarg); // recursive! 3608 3609 *arg = skipwhite_and_linebreak(*arg, evalarg); 3610 if (**arg == ')') 3611 ++*arg; 3612 else if (ret == OK) 3613 { 3614 emsg(_(e_missing_close)); 3615 clear_tv(rettv); 3616 ret = FAIL; 3617 } 3618 } 3619 break; 3620 3621 default: ret = NOTDONE; 3622 break; 3623 } 3624 3625 if (ret == NOTDONE) 3626 { 3627 /* 3628 * Must be a variable or function name. 3629 * Can also be a curly-braces kind of name: {expr}. 3630 */ 3631 s = *arg; 3632 len = get_name_len(arg, &alias, evaluate, TRUE); 3633 if (alias != NULL) 3634 s = alias; 3635 3636 if (len <= 0) 3637 ret = FAIL; 3638 else 3639 { 3640 int flags = evalarg == NULL ? 0 : evalarg->eval_flags; 3641 3642 if (evaluate && in_vim9script() && len == 1 && *s == '_') 3643 { 3644 emsg(_(e_cannot_use_underscore_here)); 3645 ret = FAIL; 3646 } 3647 else if ((in_vim9script() ? **arg : *skipwhite(*arg)) == '(') 3648 { 3649 // "name(..." recursive! 3650 *arg = skipwhite(*arg); 3651 ret = eval_func(arg, evalarg, s, len, rettv, flags, NULL); 3652 } 3653 else if (flags & EVAL_CONSTANT) 3654 ret = FAIL; 3655 else if (evaluate) 3656 { 3657 // get the value of "true", "false" or a variable 3658 if (len == 4 && in_vim9script() && STRNCMP(s, "true", 4) == 0) 3659 { 3660 rettv->v_type = VAR_BOOL; 3661 rettv->vval.v_number = VVAL_TRUE; 3662 ret = OK; 3663 } 3664 else if (len == 5 && in_vim9script() 3665 && STRNCMP(s, "false", 5) == 0) 3666 { 3667 rettv->v_type = VAR_BOOL; 3668 rettv->vval.v_number = VVAL_FALSE; 3669 ret = OK; 3670 } 3671 else if (len == 4 && in_vim9script() 3672 && STRNCMP(s, "null", 4) == 0) 3673 { 3674 rettv->v_type = VAR_SPECIAL; 3675 rettv->vval.v_number = VVAL_NULL; 3676 ret = OK; 3677 } 3678 else 3679 ret = eval_variable(s, len, rettv, NULL, 3680 EVAL_VAR_VERBOSE + EVAL_VAR_IMPORT); 3681 } 3682 else 3683 { 3684 // skip the name 3685 check_vars(s, len); 3686 ret = OK; 3687 } 3688 } 3689 vim_free(alias); 3690 } 3691 3692 // Handle following '[', '(' and '.' for expr[expr], expr.name, 3693 // expr(expr), expr->name(expr) 3694 if (ret == OK) 3695 ret = handle_subscript(arg, rettv, evalarg, TRUE); 3696 3697 /* 3698 * Apply logical NOT and unary '-', from right to left, ignore '+'. 3699 */ 3700 if (ret == OK && evaluate && end_leader > start_leader) 3701 ret = eval7_leader(rettv, FALSE, start_leader, &end_leader); 3702 return ret; 3703 } 3704 3705 /* 3706 * Apply the leading "!" and "-" before an eval7 expression to "rettv". 3707 * When "numeric_only" is TRUE only handle "+" and "-". 3708 * Adjusts "end_leaderp" until it is at "start_leader". 3709 */ 3710 static int 3711 eval7_leader( 3712 typval_T *rettv, 3713 int numeric_only, 3714 char_u *start_leader, 3715 char_u **end_leaderp) 3716 { 3717 char_u *end_leader = *end_leaderp; 3718 int ret = OK; 3719 int error = FALSE; 3720 varnumber_T val = 0; 3721 vartype_T type = rettv->v_type; 3722 #ifdef FEAT_FLOAT 3723 float_T f = 0.0; 3724 3725 if (rettv->v_type == VAR_FLOAT) 3726 f = rettv->vval.v_float; 3727 else 3728 #endif 3729 { 3730 while (VIM_ISWHITE(end_leader[-1])) 3731 --end_leader; 3732 if (in_vim9script() && end_leader[-1] == '!') 3733 val = tv2bool(rettv); 3734 else 3735 val = tv_get_number_chk(rettv, &error); 3736 } 3737 if (error) 3738 { 3739 clear_tv(rettv); 3740 ret = FAIL; 3741 } 3742 else 3743 { 3744 while (end_leader > start_leader) 3745 { 3746 --end_leader; 3747 if (*end_leader == '!') 3748 { 3749 if (numeric_only) 3750 { 3751 ++end_leader; 3752 break; 3753 } 3754 #ifdef FEAT_FLOAT 3755 if (rettv->v_type == VAR_FLOAT) 3756 { 3757 if (in_vim9script()) 3758 { 3759 rettv->v_type = VAR_BOOL; 3760 val = f == 0.0 ? VVAL_TRUE : VVAL_FALSE; 3761 } 3762 else 3763 f = !f; 3764 } 3765 else 3766 #endif 3767 { 3768 val = !val; 3769 type = VAR_BOOL; 3770 } 3771 } 3772 else if (*end_leader == '-') 3773 { 3774 #ifdef FEAT_FLOAT 3775 if (rettv->v_type == VAR_FLOAT) 3776 f = -f; 3777 else 3778 #endif 3779 { 3780 val = -val; 3781 type = VAR_NUMBER; 3782 } 3783 } 3784 } 3785 #ifdef FEAT_FLOAT 3786 if (rettv->v_type == VAR_FLOAT) 3787 { 3788 clear_tv(rettv); 3789 rettv->vval.v_float = f; 3790 } 3791 else 3792 #endif 3793 { 3794 clear_tv(rettv); 3795 if (in_vim9script()) 3796 rettv->v_type = type; 3797 else 3798 rettv->v_type = VAR_NUMBER; 3799 rettv->vval.v_number = val; 3800 } 3801 } 3802 *end_leaderp = end_leader; 3803 return ret; 3804 } 3805 3806 /* 3807 * Call the function referred to in "rettv". 3808 */ 3809 static int 3810 call_func_rettv( 3811 char_u **arg, 3812 evalarg_T *evalarg, 3813 typval_T *rettv, 3814 int evaluate, 3815 dict_T *selfdict, 3816 typval_T *basetv) 3817 { 3818 partial_T *pt = NULL; 3819 funcexe_T funcexe; 3820 typval_T functv; 3821 char_u *s; 3822 int ret; 3823 3824 // need to copy the funcref so that we can clear rettv 3825 if (evaluate) 3826 { 3827 functv = *rettv; 3828 rettv->v_type = VAR_UNKNOWN; 3829 3830 // Invoke the function. Recursive! 3831 if (functv.v_type == VAR_PARTIAL) 3832 { 3833 pt = functv.vval.v_partial; 3834 s = partial_name(pt); 3835 } 3836 else 3837 { 3838 s = functv.vval.v_string; 3839 if (s == NULL || *s == NUL) 3840 { 3841 emsg(_(e_empty_function_name)); 3842 ret = FAIL; 3843 goto theend; 3844 } 3845 } 3846 } 3847 else 3848 s = (char_u *)""; 3849 3850 CLEAR_FIELD(funcexe); 3851 funcexe.firstline = curwin->w_cursor.lnum; 3852 funcexe.lastline = curwin->w_cursor.lnum; 3853 funcexe.evaluate = evaluate; 3854 funcexe.partial = pt; 3855 funcexe.selfdict = selfdict; 3856 funcexe.basetv = basetv; 3857 ret = get_func_tv(s, -1, rettv, arg, evalarg, &funcexe); 3858 3859 theend: 3860 // Clear the funcref afterwards, so that deleting it while 3861 // evaluating the arguments is possible (see test55). 3862 if (evaluate) 3863 clear_tv(&functv); 3864 3865 return ret; 3866 } 3867 3868 /* 3869 * Evaluate "->method()". 3870 * "*arg" points to "method". 3871 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 3872 */ 3873 static int 3874 eval_lambda( 3875 char_u **arg, 3876 typval_T *rettv, 3877 evalarg_T *evalarg, 3878 int verbose) // give error messages 3879 { 3880 int evaluate = evalarg != NULL 3881 && (evalarg->eval_flags & EVAL_EVALUATE); 3882 typval_T base = *rettv; 3883 int ret; 3884 3885 rettv->v_type = VAR_UNKNOWN; 3886 3887 if (**arg == '{') 3888 { 3889 // ->{lambda}() 3890 ret = get_lambda_tv(arg, rettv, FALSE, evalarg); 3891 } 3892 else 3893 { 3894 // ->(lambda)() 3895 ++*arg; 3896 ret = eval1(arg, rettv, evalarg); 3897 *arg = skipwhite_and_linebreak(*arg, evalarg); 3898 if (**arg != ')') 3899 { 3900 emsg(_(e_missing_close)); 3901 ret = FAIL; 3902 } 3903 ++*arg; 3904 } 3905 if (ret != OK) 3906 return FAIL; 3907 else if (**arg != '(') 3908 { 3909 if (verbose) 3910 { 3911 if (*skipwhite(*arg) == '(') 3912 emsg(_(e_nowhitespace)); 3913 else 3914 semsg(_(e_missing_paren), "lambda"); 3915 } 3916 clear_tv(rettv); 3917 ret = FAIL; 3918 } 3919 else 3920 ret = call_func_rettv(arg, evalarg, rettv, evaluate, NULL, &base); 3921 3922 // Clear the funcref afterwards, so that deleting it while 3923 // evaluating the arguments is possible (see test55). 3924 if (evaluate) 3925 clear_tv(&base); 3926 3927 return ret; 3928 } 3929 3930 /* 3931 * Evaluate "->method()". 3932 * "*arg" points to "method". 3933 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 3934 */ 3935 static int 3936 eval_method( 3937 char_u **arg, 3938 typval_T *rettv, 3939 evalarg_T *evalarg, 3940 int verbose) // give error messages 3941 { 3942 char_u *name; 3943 long len; 3944 char_u *alias; 3945 typval_T base = *rettv; 3946 int ret; 3947 int evaluate = evalarg != NULL 3948 && (evalarg->eval_flags & EVAL_EVALUATE); 3949 3950 rettv->v_type = VAR_UNKNOWN; 3951 3952 name = *arg; 3953 len = get_name_len(arg, &alias, evaluate, TRUE); 3954 if (alias != NULL) 3955 name = alias; 3956 3957 if (len <= 0) 3958 { 3959 if (verbose) 3960 emsg(_("E260: Missing name after ->")); 3961 ret = FAIL; 3962 } 3963 else 3964 { 3965 *arg = skipwhite(*arg); 3966 if (**arg != '(') 3967 { 3968 if (verbose) 3969 semsg(_(e_missing_paren), name); 3970 ret = FAIL; 3971 } 3972 else if (VIM_ISWHITE((*arg)[-1])) 3973 { 3974 if (verbose) 3975 emsg(_(e_nowhitespace)); 3976 ret = FAIL; 3977 } 3978 else 3979 ret = eval_func(arg, evalarg, name, len, rettv, 3980 evaluate ? EVAL_EVALUATE : 0, &base); 3981 } 3982 3983 // Clear the funcref afterwards, so that deleting it while 3984 // evaluating the arguments is possible (see test55). 3985 if (evaluate) 3986 clear_tv(&base); 3987 3988 return ret; 3989 } 3990 3991 /* 3992 * Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key". 3993 * "*arg" points to the '[' or '.'. 3994 * Returns FAIL or OK. "*arg" is advanced to after the ']'. 3995 */ 3996 static int 3997 eval_index( 3998 char_u **arg, 3999 typval_T *rettv, 4000 evalarg_T *evalarg, 4001 int verbose) // give error messages 4002 { 4003 int evaluate = evalarg != NULL 4004 && (evalarg->eval_flags & EVAL_EVALUATE); 4005 int empty1 = FALSE, empty2 = FALSE; 4006 typval_T var1, var2; 4007 int range = FALSE; 4008 char_u *key = NULL; 4009 int keylen = -1; 4010 int vim9 = in_vim9script(); 4011 4012 if (check_can_index(rettv, evaluate, verbose) == FAIL) 4013 return FAIL; 4014 4015 init_tv(&var1); 4016 init_tv(&var2); 4017 if (**arg == '.') 4018 { 4019 /* 4020 * dict.name 4021 */ 4022 key = *arg + 1; 4023 for (keylen = 0; eval_isdictc(key[keylen]); ++keylen) 4024 ; 4025 if (keylen == 0) 4026 return FAIL; 4027 *arg = key + keylen; 4028 } 4029 else 4030 { 4031 /* 4032 * something[idx] 4033 * 4034 * Get the (first) variable from inside the []. 4035 */ 4036 *arg = skipwhite_and_linebreak(*arg + 1, evalarg); 4037 if (**arg == ':') 4038 empty1 = TRUE; 4039 else if (eval1(arg, &var1, evalarg) == FAIL) // recursive! 4040 return FAIL; 4041 else if (vim9 && **arg == ':') 4042 { 4043 semsg(_(e_white_space_required_before_and_after_str_at_str), 4044 ":", *arg); 4045 clear_tv(&var1); 4046 return FAIL; 4047 } 4048 else if (evaluate) 4049 { 4050 #ifdef FEAT_FLOAT 4051 // allow for indexing with float 4052 if (vim9 && rettv->v_type == VAR_DICT 4053 && var1.v_type == VAR_FLOAT) 4054 { 4055 var1.vval.v_string = typval_tostring(&var1, TRUE); 4056 var1.v_type = VAR_STRING; 4057 } 4058 #endif 4059 if (tv_get_string_chk(&var1) == NULL) 4060 { 4061 // not a number or string 4062 clear_tv(&var1); 4063 return FAIL; 4064 } 4065 } 4066 4067 /* 4068 * Get the second variable from inside the [:]. 4069 */ 4070 *arg = skipwhite_and_linebreak(*arg, evalarg); 4071 if (**arg == ':') 4072 { 4073 range = TRUE; 4074 ++*arg; 4075 if (vim9 && !IS_WHITE_OR_NUL(**arg) && **arg != ']') 4076 { 4077 semsg(_(e_white_space_required_before_and_after_str_at_str), 4078 ":", *arg - 1); 4079 if (!empty1) 4080 clear_tv(&var1); 4081 return FAIL; 4082 } 4083 *arg = skipwhite_and_linebreak(*arg, evalarg); 4084 if (**arg == ']') 4085 empty2 = TRUE; 4086 else if (eval1(arg, &var2, evalarg) == FAIL) // recursive! 4087 { 4088 if (!empty1) 4089 clear_tv(&var1); 4090 return FAIL; 4091 } 4092 else if (evaluate && tv_get_string_chk(&var2) == NULL) 4093 { 4094 // not a number or string 4095 if (!empty1) 4096 clear_tv(&var1); 4097 clear_tv(&var2); 4098 return FAIL; 4099 } 4100 } 4101 4102 // Check for the ']'. 4103 *arg = skipwhite_and_linebreak(*arg, evalarg); 4104 if (**arg != ']') 4105 { 4106 if (verbose) 4107 emsg(_(e_missbrac)); 4108 clear_tv(&var1); 4109 if (range) 4110 clear_tv(&var2); 4111 return FAIL; 4112 } 4113 *arg = *arg + 1; // skip over the ']' 4114 } 4115 4116 if (evaluate) 4117 { 4118 int res = eval_index_inner(rettv, range, 4119 empty1 ? NULL : &var1, empty2 ? NULL : &var2, FALSE, 4120 key, keylen, verbose); 4121 4122 if (!empty1) 4123 clear_tv(&var1); 4124 if (range) 4125 clear_tv(&var2); 4126 return res; 4127 } 4128 return OK; 4129 } 4130 4131 /* 4132 * Check if "rettv" can have an [index] or [sli:ce] 4133 */ 4134 int 4135 check_can_index(typval_T *rettv, int evaluate, int verbose) 4136 { 4137 switch (rettv->v_type) 4138 { 4139 case VAR_FUNC: 4140 case VAR_PARTIAL: 4141 if (verbose) 4142 emsg(_("E695: Cannot index a Funcref")); 4143 return FAIL; 4144 case VAR_FLOAT: 4145 #ifdef FEAT_FLOAT 4146 if (verbose) 4147 emsg(_(e_float_as_string)); 4148 return FAIL; 4149 #endif 4150 case VAR_BOOL: 4151 case VAR_SPECIAL: 4152 case VAR_JOB: 4153 case VAR_CHANNEL: 4154 case VAR_INSTR: 4155 if (verbose) 4156 emsg(_(e_cannot_index_special_variable)); 4157 return FAIL; 4158 case VAR_UNKNOWN: 4159 case VAR_ANY: 4160 case VAR_VOID: 4161 if (evaluate) 4162 { 4163 emsg(_(e_cannot_index_special_variable)); 4164 return FAIL; 4165 } 4166 // FALLTHROUGH 4167 4168 case VAR_STRING: 4169 case VAR_LIST: 4170 case VAR_DICT: 4171 case VAR_BLOB: 4172 break; 4173 case VAR_NUMBER: 4174 if (in_vim9script()) 4175 emsg(_(e_cannot_index_number)); 4176 break; 4177 } 4178 return OK; 4179 } 4180 4181 /* 4182 * slice() function 4183 */ 4184 void 4185 f_slice(typval_T *argvars, typval_T *rettv) 4186 { 4187 if (in_vim9script() 4188 && ((argvars[0].v_type != VAR_LIST 4189 && argvars[0].v_type != VAR_BLOB 4190 && argvars[0].v_type != VAR_STRING 4191 && check_for_list_arg(argvars, 0) == FAIL) 4192 || check_for_number_arg(argvars, 1) == FAIL 4193 || check_for_opt_number_arg(argvars, 2) == FAIL)) 4194 return; 4195 4196 if (check_can_index(argvars, TRUE, FALSE) == OK) 4197 { 4198 copy_tv(argvars, rettv); 4199 eval_index_inner(rettv, TRUE, argvars + 1, 4200 argvars[2].v_type == VAR_UNKNOWN ? NULL : argvars + 2, 4201 TRUE, NULL, 0, FALSE); 4202 } 4203 } 4204 4205 /* 4206 * Apply index or range to "rettv". 4207 * "var1" is the first index, NULL for [:expr]. 4208 * "var2" is the second index, NULL for [expr] and [expr: ] 4209 * "exclusive" is TRUE for slice(): second index is exclusive, use character 4210 * index for string. 4211 * Alternatively, "key" is not NULL, then key[keylen] is the dict index. 4212 */ 4213 int 4214 eval_index_inner( 4215 typval_T *rettv, 4216 int is_range, 4217 typval_T *var1, 4218 typval_T *var2, 4219 int exclusive, 4220 char_u *key, 4221 int keylen, 4222 int verbose) 4223 { 4224 varnumber_T n1, n2 = 0; 4225 long len; 4226 4227 n1 = 0; 4228 if (var1 != NULL && rettv->v_type != VAR_DICT) 4229 n1 = tv_get_number(var1); 4230 4231 if (is_range) 4232 { 4233 if (rettv->v_type == VAR_DICT) 4234 { 4235 if (verbose) 4236 emsg(_(e_cannot_slice_dictionary)); 4237 return FAIL; 4238 } 4239 if (var2 != NULL) 4240 n2 = tv_get_number(var2); 4241 else 4242 n2 = VARNUM_MAX; 4243 } 4244 4245 switch (rettv->v_type) 4246 { 4247 case VAR_UNKNOWN: 4248 case VAR_ANY: 4249 case VAR_VOID: 4250 case VAR_FUNC: 4251 case VAR_PARTIAL: 4252 case VAR_FLOAT: 4253 case VAR_BOOL: 4254 case VAR_SPECIAL: 4255 case VAR_JOB: 4256 case VAR_CHANNEL: 4257 case VAR_INSTR: 4258 break; // not evaluating, skipping over subscript 4259 4260 case VAR_NUMBER: 4261 case VAR_STRING: 4262 { 4263 char_u *s = tv_get_string(rettv); 4264 4265 len = (long)STRLEN(s); 4266 if (in_vim9script() || exclusive) 4267 { 4268 if (is_range) 4269 s = string_slice(s, n1, n2, exclusive); 4270 else 4271 s = char_from_string(s, n1); 4272 } 4273 else if (is_range) 4274 { 4275 // The resulting variable is a substring. If the indexes 4276 // are out of range the result is empty. 4277 if (n1 < 0) 4278 { 4279 n1 = len + n1; 4280 if (n1 < 0) 4281 n1 = 0; 4282 } 4283 if (n2 < 0) 4284 n2 = len + n2; 4285 else if (n2 >= len) 4286 n2 = len; 4287 if (n1 >= len || n2 < 0 || n1 > n2) 4288 s = NULL; 4289 else 4290 s = vim_strnsave(s + n1, n2 - n1 + 1); 4291 } 4292 else 4293 { 4294 // The resulting variable is a string of a single 4295 // character. If the index is too big or negative the 4296 // result is empty. 4297 if (n1 >= len || n1 < 0) 4298 s = NULL; 4299 else 4300 s = vim_strnsave(s + n1, 1); 4301 } 4302 clear_tv(rettv); 4303 rettv->v_type = VAR_STRING; 4304 rettv->vval.v_string = s; 4305 } 4306 break; 4307 4308 case VAR_BLOB: 4309 blob_slice_or_index(rettv->vval.v_blob, is_range, n1, n2, 4310 exclusive, rettv); 4311 break; 4312 4313 case VAR_LIST: 4314 if (var1 == NULL) 4315 n1 = 0; 4316 if (var2 == NULL) 4317 n2 = VARNUM_MAX; 4318 if (list_slice_or_index(rettv->vval.v_list, 4319 is_range, n1, n2, exclusive, rettv, verbose) == FAIL) 4320 return FAIL; 4321 break; 4322 4323 case VAR_DICT: 4324 { 4325 dictitem_T *item; 4326 typval_T tmp; 4327 4328 if (key == NULL) 4329 { 4330 key = tv_get_string_chk(var1); 4331 if (key == NULL) 4332 return FAIL; 4333 } 4334 4335 item = dict_find(rettv->vval.v_dict, key, (int)keylen); 4336 4337 if (item == NULL && verbose) 4338 semsg(_(e_dictkey), key); 4339 if (item == NULL) 4340 return FAIL; 4341 4342 copy_tv(&item->di_tv, &tmp); 4343 clear_tv(rettv); 4344 *rettv = tmp; 4345 } 4346 break; 4347 } 4348 return OK; 4349 } 4350 4351 /* 4352 * Return the function name of partial "pt". 4353 */ 4354 char_u * 4355 partial_name(partial_T *pt) 4356 { 4357 if (pt != NULL) 4358 { 4359 if (pt->pt_name != NULL) 4360 return pt->pt_name; 4361 if (pt->pt_func != NULL) 4362 return pt->pt_func->uf_name; 4363 } 4364 return (char_u *)""; 4365 } 4366 4367 static void 4368 partial_free(partial_T *pt) 4369 { 4370 int i; 4371 4372 for (i = 0; i < pt->pt_argc; ++i) 4373 clear_tv(&pt->pt_argv[i]); 4374 vim_free(pt->pt_argv); 4375 dict_unref(pt->pt_dict); 4376 if (pt->pt_name != NULL) 4377 { 4378 func_unref(pt->pt_name); 4379 vim_free(pt->pt_name); 4380 } 4381 else 4382 func_ptr_unref(pt->pt_func); 4383 4384 // "out_up" is no longer used, decrement refcount on partial that owns it. 4385 partial_unref(pt->pt_outer.out_up_partial); 4386 4387 // Decrease the reference count for the context of a closure. If down 4388 // to the minimum it may be time to free it. 4389 if (pt->pt_funcstack != NULL) 4390 { 4391 --pt->pt_funcstack->fs_refcount; 4392 funcstack_check_refcount(pt->pt_funcstack); 4393 } 4394 4395 vim_free(pt); 4396 } 4397 4398 /* 4399 * Unreference a closure: decrement the reference count and free it when it 4400 * becomes zero. 4401 */ 4402 void 4403 partial_unref(partial_T *pt) 4404 { 4405 if (pt != NULL) 4406 { 4407 if (--pt->pt_refcount <= 0) 4408 partial_free(pt); 4409 4410 // If the reference count goes down to one, the funcstack may be the 4411 // only reference and can be freed if no other partials reference it. 4412 else if (pt->pt_refcount == 1 && pt->pt_funcstack != NULL) 4413 funcstack_check_refcount(pt->pt_funcstack); 4414 } 4415 } 4416 4417 /* 4418 * Return the next (unique) copy ID. 4419 * Used for serializing nested structures. 4420 */ 4421 int 4422 get_copyID(void) 4423 { 4424 current_copyID += COPYID_INC; 4425 return current_copyID; 4426 } 4427 4428 /* 4429 * Garbage collection for lists and dictionaries. 4430 * 4431 * We use reference counts to be able to free most items right away when they 4432 * are no longer used. But for composite items it's possible that it becomes 4433 * unused while the reference count is > 0: When there is a recursive 4434 * reference. Example: 4435 * :let l = [1, 2, 3] 4436 * :let d = {9: l} 4437 * :let l[1] = d 4438 * 4439 * Since this is quite unusual we handle this with garbage collection: every 4440 * once in a while find out which lists and dicts are not referenced from any 4441 * variable. 4442 * 4443 * Here is a good reference text about garbage collection (refers to Python 4444 * but it applies to all reference-counting mechanisms): 4445 * http://python.ca/nas/python/gc/ 4446 */ 4447 4448 /* 4449 * Do garbage collection for lists and dicts. 4450 * When "testing" is TRUE this is called from test_garbagecollect_now(). 4451 * Return TRUE if some memory was freed. 4452 */ 4453 int 4454 garbage_collect(int testing) 4455 { 4456 int copyID; 4457 int abort = FALSE; 4458 buf_T *buf; 4459 win_T *wp; 4460 int did_free = FALSE; 4461 tabpage_T *tp; 4462 4463 if (!testing) 4464 { 4465 // Only do this once. 4466 want_garbage_collect = FALSE; 4467 may_garbage_collect = FALSE; 4468 garbage_collect_at_exit = FALSE; 4469 } 4470 4471 // The execution stack can grow big, limit the size. 4472 if (exestack.ga_maxlen - exestack.ga_len > 500) 4473 { 4474 size_t new_len; 4475 char_u *pp; 4476 int n; 4477 4478 // Keep 150% of the current size, with a minimum of the growth size. 4479 n = exestack.ga_len / 2; 4480 if (n < exestack.ga_growsize) 4481 n = exestack.ga_growsize; 4482 4483 // Don't make it bigger though. 4484 if (exestack.ga_len + n < exestack.ga_maxlen) 4485 { 4486 new_len = exestack.ga_itemsize * (exestack.ga_len + n); 4487 pp = vim_realloc(exestack.ga_data, new_len); 4488 if (pp == NULL) 4489 return FAIL; 4490 exestack.ga_maxlen = exestack.ga_len + n; 4491 exestack.ga_data = pp; 4492 } 4493 } 4494 4495 // We advance by two because we add one for items referenced through 4496 // previous_funccal. 4497 copyID = get_copyID(); 4498 4499 /* 4500 * 1. Go through all accessible variables and mark all lists and dicts 4501 * with copyID. 4502 */ 4503 4504 // Don't free variables in the previous_funccal list unless they are only 4505 // referenced through previous_funccal. This must be first, because if 4506 // the item is referenced elsewhere the funccal must not be freed. 4507 abort = abort || set_ref_in_previous_funccal(copyID); 4508 4509 // script-local variables 4510 abort = abort || garbage_collect_scriptvars(copyID); 4511 4512 // buffer-local variables 4513 FOR_ALL_BUFFERS(buf) 4514 abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID, 4515 NULL, NULL); 4516 4517 // window-local variables 4518 FOR_ALL_TAB_WINDOWS(tp, wp) 4519 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 4520 NULL, NULL); 4521 if (aucmd_win != NULL) 4522 abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID, 4523 NULL, NULL); 4524 #ifdef FEAT_PROP_POPUP 4525 FOR_ALL_POPUPWINS(wp) 4526 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 4527 NULL, NULL); 4528 FOR_ALL_TABPAGES(tp) 4529 FOR_ALL_POPUPWINS_IN_TAB(tp, wp) 4530 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 4531 NULL, NULL); 4532 #endif 4533 4534 // tabpage-local variables 4535 FOR_ALL_TABPAGES(tp) 4536 abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID, 4537 NULL, NULL); 4538 // global variables 4539 abort = abort || garbage_collect_globvars(copyID); 4540 4541 // function-local variables 4542 abort = abort || set_ref_in_call_stack(copyID); 4543 4544 // named functions (matters for closures) 4545 abort = abort || set_ref_in_functions(copyID); 4546 4547 // function call arguments, if v:testing is set. 4548 abort = abort || set_ref_in_func_args(copyID); 4549 4550 // v: vars 4551 abort = abort || garbage_collect_vimvars(copyID); 4552 4553 // callbacks in buffers 4554 abort = abort || set_ref_in_buffers(copyID); 4555 4556 #ifdef FEAT_LUA 4557 abort = abort || set_ref_in_lua(copyID); 4558 #endif 4559 4560 #ifdef FEAT_PYTHON 4561 abort = abort || set_ref_in_python(copyID); 4562 #endif 4563 4564 #ifdef FEAT_PYTHON3 4565 abort = abort || set_ref_in_python3(copyID); 4566 #endif 4567 4568 #ifdef FEAT_JOB_CHANNEL 4569 abort = abort || set_ref_in_channel(copyID); 4570 abort = abort || set_ref_in_job(copyID); 4571 #endif 4572 #ifdef FEAT_NETBEANS_INTG 4573 abort = abort || set_ref_in_nb_channel(copyID); 4574 #endif 4575 4576 #ifdef FEAT_TIMERS 4577 abort = abort || set_ref_in_timer(copyID); 4578 #endif 4579 4580 #ifdef FEAT_QUICKFIX 4581 abort = abort || set_ref_in_quickfix(copyID); 4582 #endif 4583 4584 #ifdef FEAT_TERMINAL 4585 abort = abort || set_ref_in_term(copyID); 4586 #endif 4587 4588 #ifdef FEAT_PROP_POPUP 4589 abort = abort || set_ref_in_popups(copyID); 4590 #endif 4591 4592 if (!abort) 4593 { 4594 /* 4595 * 2. Free lists and dictionaries that are not referenced. 4596 */ 4597 did_free = free_unref_items(copyID); 4598 4599 /* 4600 * 3. Check if any funccal can be freed now. 4601 * This may call us back recursively. 4602 */ 4603 free_unref_funccal(copyID, testing); 4604 } 4605 else if (p_verbose > 0) 4606 { 4607 verb_msg(_("Not enough memory to set references, garbage collection aborted!")); 4608 } 4609 4610 return did_free; 4611 } 4612 4613 /* 4614 * Free lists, dictionaries, channels and jobs that are no longer referenced. 4615 */ 4616 static int 4617 free_unref_items(int copyID) 4618 { 4619 int did_free = FALSE; 4620 4621 // Let all "free" functions know that we are here. This means no 4622 // dictionaries, lists, channels or jobs are to be freed, because we will 4623 // do that here. 4624 in_free_unref_items = TRUE; 4625 4626 /* 4627 * PASS 1: free the contents of the items. We don't free the items 4628 * themselves yet, so that it is possible to decrement refcount counters 4629 */ 4630 4631 // Go through the list of dicts and free items without the copyID. 4632 did_free |= dict_free_nonref(copyID); 4633 4634 // Go through the list of lists and free items without the copyID. 4635 did_free |= list_free_nonref(copyID); 4636 4637 #ifdef FEAT_JOB_CHANNEL 4638 // Go through the list of jobs and free items without the copyID. This 4639 // must happen before doing channels, because jobs refer to channels, but 4640 // the reference from the channel to the job isn't tracked. 4641 did_free |= free_unused_jobs_contents(copyID, COPYID_MASK); 4642 4643 // Go through the list of channels and free items without the copyID. 4644 did_free |= free_unused_channels_contents(copyID, COPYID_MASK); 4645 #endif 4646 4647 /* 4648 * PASS 2: free the items themselves. 4649 */ 4650 dict_free_items(copyID); 4651 list_free_items(copyID); 4652 4653 #ifdef FEAT_JOB_CHANNEL 4654 // Go through the list of jobs and free items without the copyID. This 4655 // must happen before doing channels, because jobs refer to channels, but 4656 // the reference from the channel to the job isn't tracked. 4657 free_unused_jobs(copyID, COPYID_MASK); 4658 4659 // Go through the list of channels and free items without the copyID. 4660 free_unused_channels(copyID, COPYID_MASK); 4661 #endif 4662 4663 in_free_unref_items = FALSE; 4664 4665 return did_free; 4666 } 4667 4668 /* 4669 * Mark all lists and dicts referenced through hashtab "ht" with "copyID". 4670 * "list_stack" is used to add lists to be marked. Can be NULL. 4671 * 4672 * Returns TRUE if setting references failed somehow. 4673 */ 4674 int 4675 set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack) 4676 { 4677 int todo; 4678 int abort = FALSE; 4679 hashitem_T *hi; 4680 hashtab_T *cur_ht; 4681 ht_stack_T *ht_stack = NULL; 4682 ht_stack_T *tempitem; 4683 4684 cur_ht = ht; 4685 for (;;) 4686 { 4687 if (!abort) 4688 { 4689 // Mark each item in the hashtab. If the item contains a hashtab 4690 // it is added to ht_stack, if it contains a list it is added to 4691 // list_stack. 4692 todo = (int)cur_ht->ht_used; 4693 for (hi = cur_ht->ht_array; todo > 0; ++hi) 4694 if (!HASHITEM_EMPTY(hi)) 4695 { 4696 --todo; 4697 abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID, 4698 &ht_stack, list_stack); 4699 } 4700 } 4701 4702 if (ht_stack == NULL) 4703 break; 4704 4705 // take an item from the stack 4706 cur_ht = ht_stack->ht; 4707 tempitem = ht_stack; 4708 ht_stack = ht_stack->prev; 4709 free(tempitem); 4710 } 4711 4712 return abort; 4713 } 4714 4715 /* 4716 * Mark a dict and its items with "copyID". 4717 * Returns TRUE if setting references failed somehow. 4718 */ 4719 int 4720 set_ref_in_dict(dict_T *d, int copyID) 4721 { 4722 if (d != NULL && d->dv_copyID != copyID) 4723 { 4724 d->dv_copyID = copyID; 4725 return set_ref_in_ht(&d->dv_hashtab, copyID, NULL); 4726 } 4727 return FALSE; 4728 } 4729 4730 /* 4731 * Mark a list and its items with "copyID". 4732 * Returns TRUE if setting references failed somehow. 4733 */ 4734 int 4735 set_ref_in_list(list_T *ll, int copyID) 4736 { 4737 if (ll != NULL && ll->lv_copyID != copyID) 4738 { 4739 ll->lv_copyID = copyID; 4740 return set_ref_in_list_items(ll, copyID, NULL); 4741 } 4742 return FALSE; 4743 } 4744 4745 /* 4746 * Mark all lists and dicts referenced through list "l" with "copyID". 4747 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4748 * 4749 * Returns TRUE if setting references failed somehow. 4750 */ 4751 int 4752 set_ref_in_list_items(list_T *l, int copyID, ht_stack_T **ht_stack) 4753 { 4754 listitem_T *li; 4755 int abort = FALSE; 4756 list_T *cur_l; 4757 list_stack_T *list_stack = NULL; 4758 list_stack_T *tempitem; 4759 4760 cur_l = l; 4761 for (;;) 4762 { 4763 if (!abort && cur_l->lv_first != &range_list_item) 4764 // Mark each item in the list. If the item contains a hashtab 4765 // it is added to ht_stack, if it contains a list it is added to 4766 // list_stack. 4767 for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next) 4768 abort = abort || set_ref_in_item(&li->li_tv, copyID, 4769 ht_stack, &list_stack); 4770 if (list_stack == NULL) 4771 break; 4772 4773 // take an item from the stack 4774 cur_l = list_stack->list; 4775 tempitem = list_stack; 4776 list_stack = list_stack->prev; 4777 free(tempitem); 4778 } 4779 4780 return abort; 4781 } 4782 4783 /* 4784 * Mark all lists and dicts referenced through typval "tv" with "copyID". 4785 * "list_stack" is used to add lists to be marked. Can be NULL. 4786 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4787 * 4788 * Returns TRUE if setting references failed somehow. 4789 */ 4790 int 4791 set_ref_in_item( 4792 typval_T *tv, 4793 int copyID, 4794 ht_stack_T **ht_stack, 4795 list_stack_T **list_stack) 4796 { 4797 int abort = FALSE; 4798 4799 if (tv->v_type == VAR_DICT) 4800 { 4801 dict_T *dd = tv->vval.v_dict; 4802 4803 if (dd != NULL && dd->dv_copyID != copyID) 4804 { 4805 // Didn't see this dict yet. 4806 dd->dv_copyID = copyID; 4807 if (ht_stack == NULL) 4808 { 4809 abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack); 4810 } 4811 else 4812 { 4813 ht_stack_T *newitem = ALLOC_ONE(ht_stack_T); 4814 4815 if (newitem == NULL) 4816 abort = TRUE; 4817 else 4818 { 4819 newitem->ht = &dd->dv_hashtab; 4820 newitem->prev = *ht_stack; 4821 *ht_stack = newitem; 4822 } 4823 } 4824 } 4825 } 4826 else if (tv->v_type == VAR_LIST) 4827 { 4828 list_T *ll = tv->vval.v_list; 4829 4830 if (ll != NULL && ll->lv_copyID != copyID) 4831 { 4832 // Didn't see this list yet. 4833 ll->lv_copyID = copyID; 4834 if (list_stack == NULL) 4835 { 4836 abort = set_ref_in_list_items(ll, copyID, ht_stack); 4837 } 4838 else 4839 { 4840 list_stack_T *newitem = ALLOC_ONE(list_stack_T); 4841 4842 if (newitem == NULL) 4843 abort = TRUE; 4844 else 4845 { 4846 newitem->list = ll; 4847 newitem->prev = *list_stack; 4848 *list_stack = newitem; 4849 } 4850 } 4851 } 4852 } 4853 else if (tv->v_type == VAR_FUNC) 4854 { 4855 abort = set_ref_in_func(tv->vval.v_string, NULL, copyID); 4856 } 4857 else if (tv->v_type == VAR_PARTIAL) 4858 { 4859 partial_T *pt = tv->vval.v_partial; 4860 int i; 4861 4862 if (pt != NULL && pt->pt_copyID != copyID) 4863 { 4864 // Didn't see this partial yet. 4865 pt->pt_copyID = copyID; 4866 4867 abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID); 4868 4869 if (pt->pt_dict != NULL) 4870 { 4871 typval_T dtv; 4872 4873 dtv.v_type = VAR_DICT; 4874 dtv.vval.v_dict = pt->pt_dict; 4875 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4876 } 4877 4878 for (i = 0; i < pt->pt_argc; ++i) 4879 abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID, 4880 ht_stack, list_stack); 4881 if (pt->pt_funcstack != NULL) 4882 { 4883 typval_T *stack = pt->pt_funcstack->fs_ga.ga_data; 4884 4885 for (i = 0; i < pt->pt_funcstack->fs_ga.ga_len; ++i) 4886 abort = abort || set_ref_in_item(stack + i, copyID, 4887 ht_stack, list_stack); 4888 } 4889 4890 } 4891 } 4892 #ifdef FEAT_JOB_CHANNEL 4893 else if (tv->v_type == VAR_JOB) 4894 { 4895 job_T *job = tv->vval.v_job; 4896 typval_T dtv; 4897 4898 if (job != NULL && job->jv_copyID != copyID) 4899 { 4900 job->jv_copyID = copyID; 4901 if (job->jv_channel != NULL) 4902 { 4903 dtv.v_type = VAR_CHANNEL; 4904 dtv.vval.v_channel = job->jv_channel; 4905 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4906 } 4907 if (job->jv_exit_cb.cb_partial != NULL) 4908 { 4909 dtv.v_type = VAR_PARTIAL; 4910 dtv.vval.v_partial = job->jv_exit_cb.cb_partial; 4911 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4912 } 4913 } 4914 } 4915 else if (tv->v_type == VAR_CHANNEL) 4916 { 4917 channel_T *ch =tv->vval.v_channel; 4918 ch_part_T part; 4919 typval_T dtv; 4920 jsonq_T *jq; 4921 cbq_T *cq; 4922 4923 if (ch != NULL && ch->ch_copyID != copyID) 4924 { 4925 ch->ch_copyID = copyID; 4926 for (part = PART_SOCK; part < PART_COUNT; ++part) 4927 { 4928 for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL; 4929 jq = jq->jq_next) 4930 set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack); 4931 for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL; 4932 cq = cq->cq_next) 4933 if (cq->cq_callback.cb_partial != NULL) 4934 { 4935 dtv.v_type = VAR_PARTIAL; 4936 dtv.vval.v_partial = cq->cq_callback.cb_partial; 4937 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4938 } 4939 if (ch->ch_part[part].ch_callback.cb_partial != NULL) 4940 { 4941 dtv.v_type = VAR_PARTIAL; 4942 dtv.vval.v_partial = 4943 ch->ch_part[part].ch_callback.cb_partial; 4944 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4945 } 4946 } 4947 if (ch->ch_callback.cb_partial != NULL) 4948 { 4949 dtv.v_type = VAR_PARTIAL; 4950 dtv.vval.v_partial = ch->ch_callback.cb_partial; 4951 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4952 } 4953 if (ch->ch_close_cb.cb_partial != NULL) 4954 { 4955 dtv.v_type = VAR_PARTIAL; 4956 dtv.vval.v_partial = ch->ch_close_cb.cb_partial; 4957 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4958 } 4959 } 4960 } 4961 #endif 4962 return abort; 4963 } 4964 4965 /* 4966 * Return a string with the string representation of a variable. 4967 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4968 * "numbuf" is used for a number. 4969 * When "copyID" is not NULL replace recursive lists and dicts with "...". 4970 * When both "echo_style" and "composite_val" are FALSE, put quotes around 4971 * strings as "string()", otherwise does not put quotes around strings, as 4972 * ":echo" displays values. 4973 * When "restore_copyID" is FALSE, repeated items in dictionaries and lists 4974 * are replaced with "...". 4975 * May return NULL. 4976 */ 4977 char_u * 4978 echo_string_core( 4979 typval_T *tv, 4980 char_u **tofree, 4981 char_u *numbuf, 4982 int copyID, 4983 int echo_style, 4984 int restore_copyID, 4985 int composite_val) 4986 { 4987 static int recurse = 0; 4988 char_u *r = NULL; 4989 4990 if (recurse >= DICT_MAXNEST) 4991 { 4992 if (!did_echo_string_emsg) 4993 { 4994 // Only give this message once for a recursive call to avoid 4995 // flooding the user with errors. And stop iterating over lists 4996 // and dicts. 4997 did_echo_string_emsg = TRUE; 4998 emsg(_("E724: variable nested too deep for displaying")); 4999 } 5000 *tofree = NULL; 5001 return (char_u *)"{E724}"; 5002 } 5003 ++recurse; 5004 5005 switch (tv->v_type) 5006 { 5007 case VAR_STRING: 5008 if (echo_style && !composite_val) 5009 { 5010 *tofree = NULL; 5011 r = tv->vval.v_string; 5012 if (r == NULL) 5013 r = (char_u *)""; 5014 } 5015 else 5016 { 5017 *tofree = string_quote(tv->vval.v_string, FALSE); 5018 r = *tofree; 5019 } 5020 break; 5021 5022 case VAR_FUNC: 5023 if (echo_style) 5024 { 5025 *tofree = NULL; 5026 r = tv->vval.v_string; 5027 } 5028 else 5029 { 5030 *tofree = string_quote(tv->vval.v_string, TRUE); 5031 r = *tofree; 5032 } 5033 break; 5034 5035 case VAR_PARTIAL: 5036 { 5037 partial_T *pt = tv->vval.v_partial; 5038 char_u *fname = string_quote(pt == NULL ? NULL 5039 : partial_name(pt), FALSE); 5040 garray_T ga; 5041 int i; 5042 char_u *tf; 5043 5044 ga_init2(&ga, 1, 100); 5045 ga_concat(&ga, (char_u *)"function("); 5046 if (fname != NULL) 5047 { 5048 ga_concat(&ga, fname); 5049 vim_free(fname); 5050 } 5051 if (pt != NULL && pt->pt_argc > 0) 5052 { 5053 ga_concat(&ga, (char_u *)", ["); 5054 for (i = 0; i < pt->pt_argc; ++i) 5055 { 5056 if (i > 0) 5057 ga_concat(&ga, (char_u *)", "); 5058 ga_concat(&ga, 5059 tv2string(&pt->pt_argv[i], &tf, numbuf, copyID)); 5060 vim_free(tf); 5061 } 5062 ga_concat(&ga, (char_u *)"]"); 5063 } 5064 if (pt != NULL && pt->pt_dict != NULL) 5065 { 5066 typval_T dtv; 5067 5068 ga_concat(&ga, (char_u *)", "); 5069 dtv.v_type = VAR_DICT; 5070 dtv.vval.v_dict = pt->pt_dict; 5071 ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID)); 5072 vim_free(tf); 5073 } 5074 ga_concat(&ga, (char_u *)")"); 5075 5076 *tofree = ga.ga_data; 5077 r = *tofree; 5078 break; 5079 } 5080 5081 case VAR_BLOB: 5082 r = blob2string(tv->vval.v_blob, tofree, numbuf); 5083 break; 5084 5085 case VAR_LIST: 5086 if (tv->vval.v_list == NULL) 5087 { 5088 // NULL list is equivalent to empty list. 5089 *tofree = NULL; 5090 r = (char_u *)"[]"; 5091 } 5092 else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID 5093 && tv->vval.v_list->lv_len > 0) 5094 { 5095 *tofree = NULL; 5096 r = (char_u *)"[...]"; 5097 } 5098 else 5099 { 5100 int old_copyID = tv->vval.v_list->lv_copyID; 5101 5102 tv->vval.v_list->lv_copyID = copyID; 5103 *tofree = list2string(tv, copyID, restore_copyID); 5104 if (restore_copyID) 5105 tv->vval.v_list->lv_copyID = old_copyID; 5106 r = *tofree; 5107 } 5108 break; 5109 5110 case VAR_DICT: 5111 if (tv->vval.v_dict == NULL) 5112 { 5113 // NULL dict is equivalent to empty dict. 5114 *tofree = NULL; 5115 r = (char_u *)"{}"; 5116 } 5117 else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID 5118 && tv->vval.v_dict->dv_hashtab.ht_used != 0) 5119 { 5120 *tofree = NULL; 5121 r = (char_u *)"{...}"; 5122 } 5123 else 5124 { 5125 int old_copyID = tv->vval.v_dict->dv_copyID; 5126 5127 tv->vval.v_dict->dv_copyID = copyID; 5128 *tofree = dict2string(tv, copyID, restore_copyID); 5129 if (restore_copyID) 5130 tv->vval.v_dict->dv_copyID = old_copyID; 5131 r = *tofree; 5132 } 5133 break; 5134 5135 case VAR_NUMBER: 5136 case VAR_UNKNOWN: 5137 case VAR_ANY: 5138 case VAR_VOID: 5139 *tofree = NULL; 5140 r = tv_get_string_buf(tv, numbuf); 5141 break; 5142 5143 case VAR_JOB: 5144 case VAR_CHANNEL: 5145 #ifdef FEAT_JOB_CHANNEL 5146 *tofree = NULL; 5147 r = tv->v_type == VAR_JOB ? job_to_string_buf(tv, numbuf) 5148 : channel_to_string_buf(tv, numbuf); 5149 if (composite_val) 5150 { 5151 *tofree = string_quote(r, FALSE); 5152 r = *tofree; 5153 } 5154 #endif 5155 break; 5156 5157 case VAR_INSTR: 5158 *tofree = NULL; 5159 r = (char_u *)"instructions"; 5160 break; 5161 5162 case VAR_FLOAT: 5163 #ifdef FEAT_FLOAT 5164 *tofree = NULL; 5165 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float); 5166 r = numbuf; 5167 break; 5168 #endif 5169 5170 case VAR_BOOL: 5171 case VAR_SPECIAL: 5172 *tofree = NULL; 5173 r = (char_u *)get_var_special_name(tv->vval.v_number); 5174 break; 5175 } 5176 5177 if (--recurse == 0) 5178 did_echo_string_emsg = FALSE; 5179 return r; 5180 } 5181 5182 /* 5183 * Return a string with the string representation of a variable. 5184 * If the memory is allocated "tofree" is set to it, otherwise NULL. 5185 * "numbuf" is used for a number. 5186 * Does not put quotes around strings, as ":echo" displays values. 5187 * When "copyID" is not NULL replace recursive lists and dicts with "...". 5188 * May return NULL. 5189 */ 5190 char_u * 5191 echo_string( 5192 typval_T *tv, 5193 char_u **tofree, 5194 char_u *numbuf, 5195 int copyID) 5196 { 5197 return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE); 5198 } 5199 5200 /* 5201 * Convert the specified byte index of line 'lnum' in buffer 'buf' to a 5202 * character index. Works only for loaded buffers. Returns -1 on failure. 5203 * The index of the first byte and the first character is zero. 5204 */ 5205 int 5206 buf_byteidx_to_charidx(buf_T *buf, int lnum, int byteidx) 5207 { 5208 char_u *str; 5209 char_u *t; 5210 int count; 5211 5212 if (buf == NULL || buf->b_ml.ml_mfp == NULL) 5213 return -1; 5214 5215 if (lnum > buf->b_ml.ml_line_count) 5216 lnum = buf->b_ml.ml_line_count; 5217 5218 str = ml_get_buf(buf, lnum, FALSE); 5219 if (str == NULL) 5220 return -1; 5221 5222 if (*str == NUL) 5223 return 0; 5224 5225 // count the number of characters 5226 t = str; 5227 for (count = 0; *t != NUL && t <= str + byteidx; count++) 5228 t += mb_ptr2len(t); 5229 5230 // In insert mode, when the cursor is at the end of a non-empty line, 5231 // byteidx points to the NUL character immediately past the end of the 5232 // string. In this case, add one to the character count. 5233 if (*t == NUL && byteidx != 0 && t == str + byteidx) 5234 count++; 5235 5236 return count - 1; 5237 } 5238 5239 /* 5240 * Convert the specified character index of line 'lnum' in buffer 'buf' to a 5241 * byte index. Works only for loaded buffers. Returns -1 on failure. 5242 * The index of the first byte and the first character is zero. 5243 */ 5244 int 5245 buf_charidx_to_byteidx(buf_T *buf, int lnum, int charidx) 5246 { 5247 char_u *str; 5248 char_u *t; 5249 5250 if (buf == NULL || buf->b_ml.ml_mfp == NULL) 5251 return -1; 5252 5253 if (lnum > buf->b_ml.ml_line_count) 5254 lnum = buf->b_ml.ml_line_count; 5255 5256 str = ml_get_buf(buf, lnum, FALSE); 5257 if (str == NULL) 5258 return -1; 5259 5260 // Convert the character offset to a byte offset 5261 t = str; 5262 while (*t != NUL && --charidx > 0) 5263 t += mb_ptr2len(t); 5264 5265 return t - str; 5266 } 5267 5268 /* 5269 * Translate a String variable into a position. 5270 * Returns NULL when there is an error. 5271 */ 5272 pos_T * 5273 var2fpos( 5274 typval_T *varp, 5275 int dollar_lnum, // TRUE when $ is last line 5276 int *fnum, // set to fnum for '0, 'A, etc. 5277 int charcol) // return character column 5278 { 5279 char_u *name; 5280 static pos_T pos; 5281 pos_T *pp; 5282 5283 // Argument can be [lnum, col, coladd]. 5284 if (varp->v_type == VAR_LIST) 5285 { 5286 list_T *l; 5287 int len; 5288 int error = FALSE; 5289 listitem_T *li; 5290 5291 l = varp->vval.v_list; 5292 if (l == NULL) 5293 return NULL; 5294 5295 // Get the line number 5296 pos.lnum = list_find_nr(l, 0L, &error); 5297 if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count) 5298 return NULL; // invalid line number 5299 if (charcol) 5300 len = (long)mb_charlen(ml_get(pos.lnum)); 5301 else 5302 len = (long)STRLEN(ml_get(pos.lnum)); 5303 5304 // Get the column number 5305 // We accept "$" for the column number: last column. 5306 li = list_find(l, 1L); 5307 if (li != NULL && li->li_tv.v_type == VAR_STRING 5308 && li->li_tv.vval.v_string != NULL 5309 && STRCMP(li->li_tv.vval.v_string, "$") == 0) 5310 { 5311 pos.col = len + 1; 5312 } 5313 else 5314 { 5315 pos.col = list_find_nr(l, 1L, &error); 5316 if (error) 5317 return NULL; 5318 } 5319 5320 // Accept a position up to the NUL after the line. 5321 if (pos.col == 0 || (int)pos.col > len + 1) 5322 return NULL; // invalid column number 5323 --pos.col; 5324 5325 // Get the virtual offset. Defaults to zero. 5326 pos.coladd = list_find_nr(l, 2L, &error); 5327 if (error) 5328 pos.coladd = 0; 5329 5330 return &pos; 5331 } 5332 5333 if (in_vim9script() && check_for_string_arg(varp, 0) == FAIL) 5334 return NULL; 5335 5336 name = tv_get_string_chk(varp); 5337 if (name == NULL) 5338 return NULL; 5339 if (name[0] == '.') // cursor 5340 { 5341 pos = curwin->w_cursor; 5342 if (charcol) 5343 pos.col = buf_byteidx_to_charidx(curbuf, pos.lnum, pos.col); 5344 return &pos; 5345 } 5346 if (name[0] == 'v' && name[1] == NUL) // Visual start 5347 { 5348 if (VIsual_active) 5349 pos = VIsual; 5350 else 5351 pos = curwin->w_cursor; 5352 if (charcol) 5353 pos.col = buf_byteidx_to_charidx(curbuf, pos.lnum, pos.col); 5354 return &pos; 5355 } 5356 if (name[0] == '\'') // mark 5357 { 5358 pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum); 5359 if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0) 5360 return NULL; 5361 if (charcol) 5362 pp->col = buf_byteidx_to_charidx(curbuf, pp->lnum, pp->col); 5363 return pp; 5364 } 5365 5366 pos.coladd = 0; 5367 5368 if (name[0] == 'w' && dollar_lnum) 5369 { 5370 pos.col = 0; 5371 if (name[1] == '0') // "w0": first visible line 5372 { 5373 update_topline(); 5374 // In silent Ex mode topline is zero, but that's not a valid line 5375 // number; use one instead. 5376 pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1; 5377 return &pos; 5378 } 5379 else if (name[1] == '$') // "w$": last visible line 5380 { 5381 validate_botline(); 5382 // In silent Ex mode botline is zero, return zero then. 5383 pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0; 5384 return &pos; 5385 } 5386 } 5387 else if (name[0] == '$') // last column or line 5388 { 5389 if (dollar_lnum) 5390 { 5391 pos.lnum = curbuf->b_ml.ml_line_count; 5392 pos.col = 0; 5393 } 5394 else 5395 { 5396 pos.lnum = curwin->w_cursor.lnum; 5397 if (charcol) 5398 pos.col = (colnr_T)mb_charlen(ml_get_curline()); 5399 else 5400 pos.col = (colnr_T)STRLEN(ml_get_curline()); 5401 } 5402 return &pos; 5403 } 5404 if (in_vim9script()) 5405 semsg(_(e_invalid_value_for_line_number_str), name); 5406 return NULL; 5407 } 5408 5409 /* 5410 * Convert list in "arg" into a position and optional file number. 5411 * When "fnump" is NULL there is no file number, only 3 items. 5412 * Note that the column is passed on as-is, the caller may want to decrement 5413 * it to use 1 for the first column. 5414 * Return FAIL when conversion is not possible, doesn't check the position for 5415 * validity. 5416 */ 5417 int 5418 list2fpos( 5419 typval_T *arg, 5420 pos_T *posp, 5421 int *fnump, 5422 colnr_T *curswantp, 5423 int charcol) 5424 { 5425 list_T *l = arg->vval.v_list; 5426 long i = 0; 5427 long n; 5428 5429 // List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only 5430 // there when "fnump" isn't NULL; "coladd" and "curswant" are optional. 5431 if (arg->v_type != VAR_LIST 5432 || l == NULL 5433 || l->lv_len < (fnump == NULL ? 2 : 3) 5434 || l->lv_len > (fnump == NULL ? 4 : 5)) 5435 return FAIL; 5436 5437 if (fnump != NULL) 5438 { 5439 n = list_find_nr(l, i++, NULL); // fnum 5440 if (n < 0) 5441 return FAIL; 5442 if (n == 0) 5443 n = curbuf->b_fnum; // current buffer 5444 *fnump = n; 5445 } 5446 5447 n = list_find_nr(l, i++, NULL); // lnum 5448 if (n < 0) 5449 return FAIL; 5450 posp->lnum = n; 5451 5452 n = list_find_nr(l, i++, NULL); // col 5453 if (n < 0) 5454 return FAIL; 5455 // If character position is specified, then convert to byte position 5456 if (charcol) 5457 { 5458 buf_T *buf; 5459 5460 // Get the text for the specified line in a loaded buffer 5461 buf = buflist_findnr(fnump == NULL ? curbuf->b_fnum : *fnump); 5462 if (buf == NULL || buf->b_ml.ml_mfp == NULL) 5463 return FAIL; 5464 5465 n = buf_charidx_to_byteidx(buf, posp->lnum, n) + 1; 5466 } 5467 posp->col = n; 5468 5469 n = list_find_nr(l, i, NULL); // off 5470 if (n < 0) 5471 posp->coladd = 0; 5472 else 5473 posp->coladd = n; 5474 5475 if (curswantp != NULL) 5476 *curswantp = list_find_nr(l, i + 1, NULL); // curswant 5477 5478 return OK; 5479 } 5480 5481 /* 5482 * Get the length of an environment variable name. 5483 * Advance "arg" to the first character after the name. 5484 * Return 0 for error. 5485 */ 5486 int 5487 get_env_len(char_u **arg) 5488 { 5489 char_u *p; 5490 int len; 5491 5492 for (p = *arg; vim_isIDc(*p); ++p) 5493 ; 5494 if (p == *arg) // no name found 5495 return 0; 5496 5497 len = (int)(p - *arg); 5498 *arg = p; 5499 return len; 5500 } 5501 5502 /* 5503 * Get the length of the name of a function or internal variable. 5504 * "arg" is advanced to after the name. 5505 * Return 0 if something is wrong. 5506 */ 5507 int 5508 get_id_len(char_u **arg) 5509 { 5510 char_u *p; 5511 int len; 5512 5513 // Find the end of the name. 5514 for (p = *arg; eval_isnamec(*p); ++p) 5515 { 5516 if (*p == ':') 5517 { 5518 // "s:" is start of "s:var", but "n:" is not and can be used in 5519 // slice "[n:]". Also "xx:" is not a namespace. 5520 len = (int)(p - *arg); 5521 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL) 5522 || len > 1) 5523 break; 5524 } 5525 } 5526 if (p == *arg) // no name found 5527 return 0; 5528 5529 len = (int)(p - *arg); 5530 *arg = p; 5531 5532 return len; 5533 } 5534 5535 /* 5536 * Get the length of the name of a variable or function. 5537 * Only the name is recognized, does not handle ".key" or "[idx]". 5538 * "arg" is advanced to the first non-white character after the name. 5539 * Return -1 if curly braces expansion failed. 5540 * Return 0 if something else is wrong. 5541 * If the name contains 'magic' {}'s, expand them and return the 5542 * expanded name in an allocated string via 'alias' - caller must free. 5543 */ 5544 int 5545 get_name_len( 5546 char_u **arg, 5547 char_u **alias, 5548 int evaluate, 5549 int verbose) 5550 { 5551 int len; 5552 char_u *p; 5553 char_u *expr_start; 5554 char_u *expr_end; 5555 5556 *alias = NULL; // default to no alias 5557 5558 if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA 5559 && (*arg)[2] == (int)KE_SNR) 5560 { 5561 // hard coded <SNR>, already translated 5562 *arg += 3; 5563 return get_id_len(arg) + 3; 5564 } 5565 len = eval_fname_script(*arg); 5566 if (len > 0) 5567 { 5568 // literal "<SID>", "s:" or "<SNR>" 5569 *arg += len; 5570 } 5571 5572 /* 5573 * Find the end of the name; check for {} construction. 5574 */ 5575 p = find_name_end(*arg, &expr_start, &expr_end, 5576 len > 0 ? 0 : FNE_CHECK_START); 5577 if (expr_start != NULL) 5578 { 5579 char_u *temp_string; 5580 5581 if (!evaluate) 5582 { 5583 len += (int)(p - *arg); 5584 *arg = skipwhite(p); 5585 return len; 5586 } 5587 5588 /* 5589 * Include any <SID> etc in the expanded string: 5590 * Thus the -len here. 5591 */ 5592 temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p); 5593 if (temp_string == NULL) 5594 return -1; 5595 *alias = temp_string; 5596 *arg = skipwhite(p); 5597 return (int)STRLEN(temp_string); 5598 } 5599 5600 len += get_id_len(arg); 5601 // Only give an error when there is something, otherwise it will be 5602 // reported at a higher level. 5603 if (len == 0 && verbose && **arg != NUL) 5604 semsg(_(e_invalid_expression_str), *arg); 5605 5606 return len; 5607 } 5608 5609 /* 5610 * Find the end of a variable or function name, taking care of magic braces. 5611 * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the 5612 * start and end of the first magic braces item. 5613 * "flags" can have FNE_INCL_BR and FNE_CHECK_START. 5614 * Return a pointer to just after the name. Equal to "arg" if there is no 5615 * valid name. 5616 */ 5617 char_u * 5618 find_name_end( 5619 char_u *arg, 5620 char_u **expr_start, 5621 char_u **expr_end, 5622 int flags) 5623 { 5624 int mb_nest = 0; 5625 int br_nest = 0; 5626 char_u *p; 5627 int len; 5628 int vim9script = in_vim9script(); 5629 5630 if (expr_start != NULL) 5631 { 5632 *expr_start = NULL; 5633 *expr_end = NULL; 5634 } 5635 5636 // Quick check for valid starting character. 5637 if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) 5638 && (*arg != '{' || vim9script)) 5639 return arg; 5640 5641 for (p = arg; *p != NUL 5642 && (eval_isnamec(*p) 5643 || (*p == '{' && !vim9script) 5644 || ((flags & FNE_INCL_BR) && (*p == '[' 5645 || (*p == '.' && eval_isdictc(p[1])))) 5646 || mb_nest != 0 5647 || br_nest != 0); MB_PTR_ADV(p)) 5648 { 5649 if (*p == '\'') 5650 { 5651 // skip over 'string' to avoid counting [ and ] inside it. 5652 for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p)) 5653 ; 5654 if (*p == NUL) 5655 break; 5656 } 5657 else if (*p == '"') 5658 { 5659 // skip over "str\"ing" to avoid counting [ and ] inside it. 5660 for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p)) 5661 if (*p == '\\' && p[1] != NUL) 5662 ++p; 5663 if (*p == NUL) 5664 break; 5665 } 5666 else if (br_nest == 0 && mb_nest == 0 && *p == ':') 5667 { 5668 // "s:" is start of "s:var", but "n:" is not and can be used in 5669 // slice "[n:]". Also "xx:" is not a namespace. But {ns}: is. 5670 len = (int)(p - arg); 5671 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL) 5672 || (len > 1 && p[-1] != '}')) 5673 break; 5674 } 5675 5676 if (mb_nest == 0) 5677 { 5678 if (*p == '[') 5679 ++br_nest; 5680 else if (*p == ']') 5681 --br_nest; 5682 } 5683 5684 if (br_nest == 0 && !vim9script) 5685 { 5686 if (*p == '{') 5687 { 5688 mb_nest++; 5689 if (expr_start != NULL && *expr_start == NULL) 5690 *expr_start = p; 5691 } 5692 else if (*p == '}') 5693 { 5694 mb_nest--; 5695 if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL) 5696 *expr_end = p; 5697 } 5698 } 5699 } 5700 5701 return p; 5702 } 5703 5704 /* 5705 * Expands out the 'magic' {}'s in a variable/function name. 5706 * Note that this can call itself recursively, to deal with 5707 * constructs like foo{bar}{baz}{bam} 5708 * The four pointer arguments point to "foo{expre}ss{ion}bar" 5709 * "in_start" ^ 5710 * "expr_start" ^ 5711 * "expr_end" ^ 5712 * "in_end" ^ 5713 * 5714 * Returns a new allocated string, which the caller must free. 5715 * Returns NULL for failure. 5716 */ 5717 static char_u * 5718 make_expanded_name( 5719 char_u *in_start, 5720 char_u *expr_start, 5721 char_u *expr_end, 5722 char_u *in_end) 5723 { 5724 char_u c1; 5725 char_u *retval = NULL; 5726 char_u *temp_result; 5727 5728 if (expr_end == NULL || in_end == NULL) 5729 return NULL; 5730 *expr_start = NUL; 5731 *expr_end = NUL; 5732 c1 = *in_end; 5733 *in_end = NUL; 5734 5735 temp_result = eval_to_string(expr_start + 1, FALSE); 5736 if (temp_result != NULL) 5737 { 5738 retval = alloc(STRLEN(temp_result) + (expr_start - in_start) 5739 + (in_end - expr_end) + 1); 5740 if (retval != NULL) 5741 { 5742 STRCPY(retval, in_start); 5743 STRCAT(retval, temp_result); 5744 STRCAT(retval, expr_end + 1); 5745 } 5746 } 5747 vim_free(temp_result); 5748 5749 *in_end = c1; // put char back for error messages 5750 *expr_start = '{'; 5751 *expr_end = '}'; 5752 5753 if (retval != NULL) 5754 { 5755 temp_result = find_name_end(retval, &expr_start, &expr_end, 0); 5756 if (expr_start != NULL) 5757 { 5758 // Further expansion! 5759 temp_result = make_expanded_name(retval, expr_start, 5760 expr_end, temp_result); 5761 vim_free(retval); 5762 retval = temp_result; 5763 } 5764 } 5765 5766 return retval; 5767 } 5768 5769 /* 5770 * Return TRUE if character "c" can be used in a variable or function name. 5771 * Does not include '{' or '}' for magic braces. 5772 */ 5773 int 5774 eval_isnamec(int c) 5775 { 5776 return ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR; 5777 } 5778 5779 /* 5780 * Return TRUE if character "c" can be used as the first character in a 5781 * variable or function name (excluding '{' and '}'). 5782 */ 5783 int 5784 eval_isnamec1(int c) 5785 { 5786 return ASCII_ISALPHA(c) || c == '_'; 5787 } 5788 5789 /* 5790 * Return TRUE if character "c" can be used as the first character of a 5791 * dictionary key. 5792 */ 5793 int 5794 eval_isdictc(int c) 5795 { 5796 return ASCII_ISALNUM(c) || c == '_'; 5797 } 5798 5799 /* 5800 * Handle: 5801 * - expr[expr], expr[expr:expr] subscript 5802 * - ".name" lookup 5803 * - function call with Funcref variable: func(expr) 5804 * - method call: var->method() 5805 * 5806 * Can all be combined in any order: dict.func(expr)[idx]['func'](expr)->len() 5807 */ 5808 int 5809 handle_subscript( 5810 char_u **arg, 5811 typval_T *rettv, 5812 evalarg_T *evalarg, 5813 int verbose) // give error messages 5814 { 5815 int evaluate = evalarg != NULL 5816 && (evalarg->eval_flags & EVAL_EVALUATE); 5817 int ret = OK; 5818 dict_T *selfdict = NULL; 5819 int check_white = TRUE; 5820 int getnext; 5821 char_u *p; 5822 5823 while (ret == OK) 5824 { 5825 // When at the end of the line and ".name" or "->{" or "->X" follows in 5826 // the next line then consume the line break. 5827 p = eval_next_non_blank(*arg, evalarg, &getnext); 5828 if (getnext 5829 && ((rettv->v_type == VAR_DICT && *p == '.' && eval_isdictc(p[1])) 5830 || (p[0] == '-' && p[1] == '>' && (p[2] == '{' 5831 || ASCII_ISALPHA(in_vim9script() ? *skipwhite(p + 2) 5832 : p[2]))))) 5833 { 5834 *arg = eval_next_line(evalarg); 5835 p = *arg; 5836 check_white = FALSE; 5837 } 5838 5839 if (rettv->v_type == VAR_ANY) 5840 { 5841 char_u *exp_name; 5842 int cc; 5843 int idx; 5844 ufunc_T *ufunc; 5845 type_T *type; 5846 5847 // Found script from "import * as {name}", script item name must 5848 // follow. 5849 if (**arg != '.') 5850 { 5851 if (verbose) 5852 semsg(_(e_expected_str_but_got_str), "'.'", *arg); 5853 ret = FAIL; 5854 break; 5855 } 5856 ++*arg; 5857 if (IS_WHITE_OR_NUL(**arg)) 5858 { 5859 if (verbose) 5860 emsg(_(e_no_white_space_allowed_after_dot)); 5861 ret = FAIL; 5862 break; 5863 } 5864 5865 // isolate the name 5866 exp_name = *arg; 5867 while (eval_isnamec(**arg)) 5868 ++*arg; 5869 cc = **arg; 5870 **arg = NUL; 5871 5872 idx = find_exported(rettv->vval.v_number, exp_name, &ufunc, &type, 5873 evalarg->eval_cctx, verbose); 5874 **arg = cc; 5875 *arg = skipwhite(*arg); 5876 5877 if (idx < 0 && ufunc == NULL) 5878 { 5879 ret = FAIL; 5880 break; 5881 } 5882 if (idx >= 0) 5883 { 5884 scriptitem_T *si = SCRIPT_ITEM(rettv->vval.v_number); 5885 svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + idx; 5886 5887 copy_tv(sv->sv_tv, rettv); 5888 } 5889 else 5890 { 5891 rettv->v_type = VAR_FUNC; 5892 rettv->vval.v_string = vim_strsave(ufunc->uf_name); 5893 } 5894 } 5895 5896 if ((**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC 5897 || rettv->v_type == VAR_PARTIAL)) 5898 && (!check_white || !VIM_ISWHITE(*(*arg - 1)))) 5899 { 5900 ret = call_func_rettv(arg, evalarg, rettv, evaluate, 5901 selfdict, NULL); 5902 5903 // Stop the expression evaluation when immediately aborting on 5904 // error, or when an interrupt occurred or an exception was thrown 5905 // but not caught. 5906 if (aborting()) 5907 { 5908 if (ret == OK) 5909 clear_tv(rettv); 5910 ret = FAIL; 5911 } 5912 dict_unref(selfdict); 5913 selfdict = NULL; 5914 } 5915 else if (p[0] == '-' && p[1] == '>') 5916 { 5917 if (in_vim9script()) 5918 *arg = skipwhite(p + 2); 5919 else 5920 *arg = p + 2; 5921 if (ret == OK) 5922 { 5923 if (VIM_ISWHITE(**arg)) 5924 { 5925 emsg(_(e_nowhitespace)); 5926 ret = FAIL; 5927 } 5928 else if ((**arg == '{' && !in_vim9script()) || **arg == '(') 5929 // expr->{lambda}() or expr->(lambda)() 5930 ret = eval_lambda(arg, rettv, evalarg, verbose); 5931 else 5932 // expr->name() 5933 ret = eval_method(arg, rettv, evalarg, verbose); 5934 } 5935 } 5936 // "." is ".name" lookup when we found a dict or when evaluating and 5937 // scriptversion is at least 2, where string concatenation is "..". 5938 else if (**arg == '[' 5939 || (**arg == '.' && (rettv->v_type == VAR_DICT 5940 || (!evaluate 5941 && (*arg)[1] != '.' 5942 && current_sctx.sc_version >= 2)))) 5943 { 5944 dict_unref(selfdict); 5945 if (rettv->v_type == VAR_DICT) 5946 { 5947 selfdict = rettv->vval.v_dict; 5948 if (selfdict != NULL) 5949 ++selfdict->dv_refcount; 5950 } 5951 else 5952 selfdict = NULL; 5953 if (eval_index(arg, rettv, evalarg, verbose) == FAIL) 5954 { 5955 clear_tv(rettv); 5956 ret = FAIL; 5957 } 5958 } 5959 else 5960 break; 5961 } 5962 5963 // Turn "dict.Func" into a partial for "Func" bound to "dict". 5964 // Don't do this when "Func" is already a partial that was bound 5965 // explicitly (pt_auto is FALSE). 5966 if (selfdict != NULL 5967 && (rettv->v_type == VAR_FUNC 5968 || (rettv->v_type == VAR_PARTIAL 5969 && (rettv->vval.v_partial->pt_auto 5970 || rettv->vval.v_partial->pt_dict == NULL)))) 5971 selfdict = make_partial(selfdict, rettv); 5972 5973 dict_unref(selfdict); 5974 return ret; 5975 } 5976 5977 /* 5978 * Make a copy of an item. 5979 * Lists and Dictionaries are also copied. A deep copy if "deep" is set. 5980 * For deepcopy() "copyID" is zero for a full copy or the ID for when a 5981 * reference to an already copied list/dict can be used. 5982 * Returns FAIL or OK. 5983 */ 5984 int 5985 item_copy( 5986 typval_T *from, 5987 typval_T *to, 5988 int deep, 5989 int copyID) 5990 { 5991 static int recurse = 0; 5992 int ret = OK; 5993 5994 if (recurse >= DICT_MAXNEST) 5995 { 5996 emsg(_("E698: variable nested too deep for making a copy")); 5997 return FAIL; 5998 } 5999 ++recurse; 6000 6001 switch (from->v_type) 6002 { 6003 case VAR_NUMBER: 6004 case VAR_FLOAT: 6005 case VAR_STRING: 6006 case VAR_FUNC: 6007 case VAR_PARTIAL: 6008 case VAR_BOOL: 6009 case VAR_SPECIAL: 6010 case VAR_JOB: 6011 case VAR_CHANNEL: 6012 case VAR_INSTR: 6013 copy_tv(from, to); 6014 break; 6015 case VAR_LIST: 6016 to->v_type = VAR_LIST; 6017 to->v_lock = 0; 6018 if (from->vval.v_list == NULL) 6019 to->vval.v_list = NULL; 6020 else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID) 6021 { 6022 // use the copy made earlier 6023 to->vval.v_list = from->vval.v_list->lv_copylist; 6024 ++to->vval.v_list->lv_refcount; 6025 } 6026 else 6027 to->vval.v_list = list_copy(from->vval.v_list, deep, copyID); 6028 if (to->vval.v_list == NULL) 6029 ret = FAIL; 6030 break; 6031 case VAR_BLOB: 6032 ret = blob_copy(from->vval.v_blob, to); 6033 break; 6034 case VAR_DICT: 6035 to->v_type = VAR_DICT; 6036 to->v_lock = 0; 6037 if (from->vval.v_dict == NULL) 6038 to->vval.v_dict = NULL; 6039 else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID) 6040 { 6041 // use the copy made earlier 6042 to->vval.v_dict = from->vval.v_dict->dv_copydict; 6043 ++to->vval.v_dict->dv_refcount; 6044 } 6045 else 6046 to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID); 6047 if (to->vval.v_dict == NULL) 6048 ret = FAIL; 6049 break; 6050 case VAR_UNKNOWN: 6051 case VAR_ANY: 6052 case VAR_VOID: 6053 internal_error_no_abort("item_copy(UNKNOWN)"); 6054 ret = FAIL; 6055 } 6056 --recurse; 6057 return ret; 6058 } 6059 6060 void 6061 echo_one(typval_T *rettv, int with_space, int *atstart, int *needclr) 6062 { 6063 char_u *tofree; 6064 char_u numbuf[NUMBUFLEN]; 6065 char_u *p = echo_string(rettv, &tofree, numbuf, get_copyID()); 6066 6067 if (*atstart) 6068 { 6069 *atstart = FALSE; 6070 // Call msg_start() after eval1(), evaluating the expression 6071 // may cause a message to appear. 6072 if (with_space) 6073 { 6074 // Mark the saved text as finishing the line, so that what 6075 // follows is displayed on a new line when scrolling back 6076 // at the more prompt. 6077 msg_sb_eol(); 6078 msg_start(); 6079 } 6080 } 6081 else if (with_space) 6082 msg_puts_attr(" ", echo_attr); 6083 6084 if (p != NULL) 6085 for ( ; *p != NUL && !got_int; ++p) 6086 { 6087 if (*p == '\n' || *p == '\r' || *p == TAB) 6088 { 6089 if (*p != TAB && *needclr) 6090 { 6091 // remove any text still there from the command 6092 msg_clr_eos(); 6093 *needclr = FALSE; 6094 } 6095 msg_putchar_attr(*p, echo_attr); 6096 } 6097 else 6098 { 6099 if (has_mbyte) 6100 { 6101 int i = (*mb_ptr2len)(p); 6102 6103 (void)msg_outtrans_len_attr(p, i, echo_attr); 6104 p += i - 1; 6105 } 6106 else 6107 (void)msg_outtrans_len_attr(p, 1, echo_attr); 6108 } 6109 } 6110 vim_free(tofree); 6111 } 6112 6113 /* 6114 * ":echo expr1 ..." print each argument separated with a space, add a 6115 * newline at the end. 6116 * ":echon expr1 ..." print each argument plain. 6117 */ 6118 void 6119 ex_echo(exarg_T *eap) 6120 { 6121 char_u *arg = eap->arg; 6122 typval_T rettv; 6123 char_u *arg_start; 6124 int needclr = TRUE; 6125 int atstart = TRUE; 6126 int did_emsg_before = did_emsg; 6127 int called_emsg_before = called_emsg; 6128 evalarg_T evalarg; 6129 6130 fill_evalarg_from_eap(&evalarg, eap, eap->skip); 6131 6132 if (eap->skip) 6133 ++emsg_skip; 6134 while ((!ends_excmd2(eap->cmd, arg) || *arg == '"') && !got_int) 6135 { 6136 // If eval1() causes an error message the text from the command may 6137 // still need to be cleared. E.g., "echo 22,44". 6138 need_clr_eos = needclr; 6139 6140 arg_start = arg; 6141 if (eval1(&arg, &rettv, &evalarg) == FAIL) 6142 { 6143 /* 6144 * Report the invalid expression unless the expression evaluation 6145 * has been cancelled due to an aborting error, an interrupt, or an 6146 * exception. 6147 */ 6148 if (!aborting() && did_emsg == did_emsg_before 6149 && called_emsg == called_emsg_before) 6150 semsg(_(e_invalid_expression_str), arg_start); 6151 need_clr_eos = FALSE; 6152 break; 6153 } 6154 need_clr_eos = FALSE; 6155 6156 if (!eap->skip) 6157 { 6158 if (rettv.v_type == VAR_VOID) 6159 { 6160 semsg(_(e_expression_does_not_result_in_value_str), arg_start); 6161 break; 6162 } 6163 echo_one(&rettv, eap->cmdidx == CMD_echo, &atstart, &needclr); 6164 } 6165 6166 clear_tv(&rettv); 6167 arg = skipwhite(arg); 6168 } 6169 eap->nextcmd = check_nextcmd(arg); 6170 clear_evalarg(&evalarg, eap); 6171 6172 if (eap->skip) 6173 --emsg_skip; 6174 else 6175 { 6176 // remove text that may still be there from the command 6177 if (needclr) 6178 msg_clr_eos(); 6179 if (eap->cmdidx == CMD_echo) 6180 msg_end(); 6181 } 6182 } 6183 6184 /* 6185 * ":echohl {name}". 6186 */ 6187 void 6188 ex_echohl(exarg_T *eap) 6189 { 6190 echo_attr = syn_name2attr(eap->arg); 6191 } 6192 6193 /* 6194 * Returns the :echo attribute 6195 */ 6196 int 6197 get_echo_attr(void) 6198 { 6199 return echo_attr; 6200 } 6201 6202 /* 6203 * ":execute expr1 ..." execute the result of an expression. 6204 * ":echomsg expr1 ..." Print a message 6205 * ":echoerr expr1 ..." Print an error 6206 * ":echoconsole expr1 ..." Print a message on stdout 6207 * Each gets spaces around each argument and a newline at the end for 6208 * echo commands 6209 */ 6210 void 6211 ex_execute(exarg_T *eap) 6212 { 6213 char_u *arg = eap->arg; 6214 typval_T rettv; 6215 int ret = OK; 6216 char_u *p; 6217 garray_T ga; 6218 int len; 6219 long start_lnum = SOURCING_LNUM; 6220 6221 ga_init2(&ga, 1, 80); 6222 6223 if (eap->skip) 6224 ++emsg_skip; 6225 while (!ends_excmd2(eap->cmd, arg) || *arg == '"') 6226 { 6227 ret = eval1_emsg(&arg, &rettv, eap); 6228 if (ret == FAIL) 6229 break; 6230 6231 if (!eap->skip) 6232 { 6233 char_u buf[NUMBUFLEN]; 6234 6235 if (eap->cmdidx == CMD_execute) 6236 { 6237 if (rettv.v_type == VAR_CHANNEL || rettv.v_type == VAR_JOB) 6238 { 6239 semsg(_(e_using_invalid_value_as_string_str), 6240 vartype_name(rettv.v_type)); 6241 p = NULL; 6242 } 6243 else 6244 p = tv_get_string_buf(&rettv, buf); 6245 } 6246 else 6247 p = tv_stringify(&rettv, buf); 6248 if (p == NULL) 6249 { 6250 clear_tv(&rettv); 6251 ret = FAIL; 6252 break; 6253 } 6254 len = (int)STRLEN(p); 6255 if (ga_grow(&ga, len + 2) == FAIL) 6256 { 6257 clear_tv(&rettv); 6258 ret = FAIL; 6259 break; 6260 } 6261 if (ga.ga_len) 6262 ((char_u *)(ga.ga_data))[ga.ga_len++] = ' '; 6263 STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p); 6264 ga.ga_len += len; 6265 } 6266 6267 clear_tv(&rettv); 6268 arg = skipwhite(arg); 6269 } 6270 6271 if (ret != FAIL && ga.ga_data != NULL) 6272 { 6273 // use the first line of continuation lines for messages 6274 SOURCING_LNUM = start_lnum; 6275 6276 if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr) 6277 { 6278 // Mark the already saved text as finishing the line, so that what 6279 // follows is displayed on a new line when scrolling back at the 6280 // more prompt. 6281 msg_sb_eol(); 6282 } 6283 6284 if (eap->cmdidx == CMD_echomsg) 6285 { 6286 msg_attr(ga.ga_data, echo_attr); 6287 out_flush(); 6288 } 6289 else if (eap->cmdidx == CMD_echoconsole) 6290 { 6291 ui_write(ga.ga_data, (int)STRLEN(ga.ga_data), TRUE); 6292 ui_write((char_u *)"\r\n", 2, TRUE); 6293 } 6294 else if (eap->cmdidx == CMD_echoerr) 6295 { 6296 int save_did_emsg = did_emsg; 6297 6298 // We don't want to abort following commands, restore did_emsg. 6299 emsg(ga.ga_data); 6300 if (!force_abort) 6301 did_emsg = save_did_emsg; 6302 } 6303 else if (eap->cmdidx == CMD_execute) 6304 do_cmdline((char_u *)ga.ga_data, 6305 eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE); 6306 } 6307 6308 ga_clear(&ga); 6309 6310 if (eap->skip) 6311 --emsg_skip; 6312 6313 eap->nextcmd = check_nextcmd(arg); 6314 } 6315 6316 /* 6317 * Skip over the name of an option: "&option", "&g:option" or "&l:option". 6318 * "arg" points to the "&" or '+' when called, to "option" when returning. 6319 * Returns NULL when no option name found. Otherwise pointer to the char 6320 * after the option name. 6321 */ 6322 char_u * 6323 find_option_end(char_u **arg, int *opt_flags) 6324 { 6325 char_u *p = *arg; 6326 6327 ++p; 6328 if (*p == 'g' && p[1] == ':') 6329 { 6330 *opt_flags = OPT_GLOBAL; 6331 p += 2; 6332 } 6333 else if (*p == 'l' && p[1] == ':') 6334 { 6335 *opt_flags = OPT_LOCAL; 6336 p += 2; 6337 } 6338 else 6339 *opt_flags = 0; 6340 6341 if (!ASCII_ISALPHA(*p)) 6342 return NULL; 6343 *arg = p; 6344 6345 if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL) 6346 p += 4; // termcap option 6347 else 6348 while (ASCII_ISALPHA(*p)) 6349 ++p; 6350 return p; 6351 } 6352 6353 /* 6354 * Display script name where an item was last set. 6355 * Should only be invoked when 'verbose' is non-zero. 6356 */ 6357 void 6358 last_set_msg(sctx_T script_ctx) 6359 { 6360 char_u *p; 6361 6362 if (script_ctx.sc_sid != 0) 6363 { 6364 p = home_replace_save(NULL, get_scriptname(script_ctx.sc_sid)); 6365 if (p != NULL) 6366 { 6367 verbose_enter(); 6368 msg_puts(_("\n\tLast set from ")); 6369 msg_puts((char *)p); 6370 if (script_ctx.sc_lnum > 0) 6371 { 6372 msg_puts(_(line_msg)); 6373 msg_outnum((long)script_ctx.sc_lnum); 6374 } 6375 verbose_leave(); 6376 vim_free(p); 6377 } 6378 } 6379 } 6380 6381 #endif // FEAT_EVAL 6382 6383 /* 6384 * Perform a substitution on "str" with pattern "pat" and substitute "sub". 6385 * When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL. 6386 * "flags" can be "g" to do a global substitute. 6387 * Returns an allocated string, NULL for error. 6388 */ 6389 char_u * 6390 do_string_sub( 6391 char_u *str, 6392 char_u *pat, 6393 char_u *sub, 6394 typval_T *expr, 6395 char_u *flags) 6396 { 6397 int sublen; 6398 regmatch_T regmatch; 6399 int i; 6400 int do_all; 6401 char_u *tail; 6402 char_u *end; 6403 garray_T ga; 6404 char_u *ret; 6405 char_u *save_cpo; 6406 char_u *zero_width = NULL; 6407 6408 // Make 'cpoptions' empty, so that the 'l' flag doesn't work here 6409 save_cpo = p_cpo; 6410 p_cpo = empty_option; 6411 6412 ga_init2(&ga, 1, 200); 6413 6414 do_all = (flags[0] == 'g'); 6415 6416 regmatch.rm_ic = p_ic; 6417 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 6418 if (regmatch.regprog != NULL) 6419 { 6420 tail = str; 6421 end = str + STRLEN(str); 6422 while (vim_regexec_nl(®match, str, (colnr_T)(tail - str))) 6423 { 6424 // Skip empty match except for first match. 6425 if (regmatch.startp[0] == regmatch.endp[0]) 6426 { 6427 if (zero_width == regmatch.startp[0]) 6428 { 6429 // avoid getting stuck on a match with an empty string 6430 i = mb_ptr2len(tail); 6431 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, 6432 (size_t)i); 6433 ga.ga_len += i; 6434 tail += i; 6435 continue; 6436 } 6437 zero_width = regmatch.startp[0]; 6438 } 6439 6440 /* 6441 * Get some space for a temporary buffer to do the substitution 6442 * into. It will contain: 6443 * - The text up to where the match is. 6444 * - The substituted text. 6445 * - The text after the match. 6446 */ 6447 sublen = vim_regsub(®match, sub, expr, tail, FALSE, TRUE, FALSE); 6448 if (ga_grow(&ga, (int)((end - tail) + sublen - 6449 (regmatch.endp[0] - regmatch.startp[0]))) == FAIL) 6450 { 6451 ga_clear(&ga); 6452 break; 6453 } 6454 6455 // copy the text up to where the match is 6456 i = (int)(regmatch.startp[0] - tail); 6457 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i); 6458 // add the substituted text 6459 (void)vim_regsub(®match, sub, expr, (char_u *)ga.ga_data 6460 + ga.ga_len + i, TRUE, TRUE, FALSE); 6461 ga.ga_len += i + sublen - 1; 6462 tail = regmatch.endp[0]; 6463 if (*tail == NUL) 6464 break; 6465 if (!do_all) 6466 break; 6467 } 6468 6469 if (ga.ga_data != NULL) 6470 STRCPY((char *)ga.ga_data + ga.ga_len, tail); 6471 6472 vim_regfree(regmatch.regprog); 6473 } 6474 6475 ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data); 6476 ga_clear(&ga); 6477 if (p_cpo == empty_option) 6478 p_cpo = save_cpo; 6479 else 6480 { 6481 // Darn, evaluating {sub} expression or {expr} changed the value. 6482 // If it's still empty it was changed and restored, need to restore in 6483 // the complicated way. 6484 if (*p_cpo == NUL) 6485 set_option_value((char_u *)"cpo", 0L, save_cpo, 0); 6486 free_string_option(save_cpo); 6487 } 6488 6489 return ret; 6490 } 6491