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