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