1 /* vi:set ts=8 sts=4 sw=4 noet: 2 * 3 * VIM - Vi IMproved by Bram Moolenaar 4 * 5 * Do ":help uganda" in Vim to read copying and usage conditions. 6 * Do ":help credits" in Vim to see a list of people who contributed. 7 * See README.txt for an overview of the Vim source code. 8 */ 9 10 /* 11 * eval.c: Expression evaluation. 12 */ 13 #define USING_FLOAT_STUFF 14 15 #include "vim.h" 16 17 #if defined(FEAT_EVAL) || defined(PROTO) 18 19 #ifdef VMS 20 # include <float.h> 21 #endif 22 23 static char *e_missbrac = N_("E111: Missing ']'"); 24 static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary"); 25 #ifdef FEAT_FLOAT 26 static char *e_float_as_string = N_("E806: using Float as a String"); 27 #endif 28 static char *e_nowhitespace = N_("E274: No white space allowed before parenthesis"); 29 30 #define NAMESPACE_CHAR (char_u *)"abglstvw" 31 32 /* 33 * When recursively copying lists and dicts we need to remember which ones we 34 * have done to avoid endless recursiveness. This unique ID is used for that. 35 * The last bit is used for previous_funccal, ignored when comparing. 36 */ 37 static int current_copyID = 0; 38 39 static int echo_attr = 0; /* attributes used for ":echo" */ 40 41 /* 42 * Info used by a ":for" loop. 43 */ 44 typedef struct 45 { 46 int fi_semicolon; /* TRUE if ending in '; var]' */ 47 int fi_varcount; /* nr of variables in the list */ 48 listwatch_T fi_lw; /* keep an eye on the item used. */ 49 list_T *fi_list; /* list being used */ 50 int fi_bi; /* index of blob */ 51 blob_T *fi_blob; /* blob being used */ 52 } forinfo_T; 53 54 static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op); 55 static int eval2(char_u **arg, typval_T *rettv, int evaluate); 56 static int eval3(char_u **arg, typval_T *rettv, int evaluate); 57 static int eval4(char_u **arg, typval_T *rettv, int evaluate); 58 static int eval5(char_u **arg, typval_T *rettv, int evaluate); 59 static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string); 60 static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string); 61 static int eval7_leader(typval_T *rettv, char_u *start_leader, char_u **end_leaderp); 62 63 static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate); 64 static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate); 65 static int free_unref_items(int copyID); 66 static int get_env_tv(char_u **arg, typval_T *rettv, int evaluate); 67 static char_u *make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end); 68 static int tv_check_lock(typval_T *tv, char_u *name, int use_gettext); 69 70 /* 71 * Return "n1" divided by "n2", taking care of dividing by zero. 72 */ 73 varnumber_T 74 num_divide(varnumber_T n1, varnumber_T n2) 75 { 76 varnumber_T result; 77 78 if (n2 == 0) // give an error message? 79 { 80 if (n1 == 0) 81 result = VARNUM_MIN; // similar to NaN 82 else if (n1 < 0) 83 result = -VARNUM_MAX; 84 else 85 result = VARNUM_MAX; 86 } 87 else 88 result = n1 / n2; 89 90 return result; 91 } 92 93 /* 94 * Return "n1" modulus "n2", taking care of dividing by zero. 95 */ 96 varnumber_T 97 num_modulus(varnumber_T n1, varnumber_T n2) 98 { 99 // Give an error when n2 is 0? 100 return (n2 == 0) ? 0 : (n1 % n2); 101 } 102 103 #if defined(EBCDIC) || defined(PROTO) 104 /* 105 * Compare struct fst by function name. 106 */ 107 static int 108 compare_func_name(const void *s1, const void *s2) 109 { 110 struct fst *p1 = (struct fst *)s1; 111 struct fst *p2 = (struct fst *)s2; 112 113 return STRCMP(p1->f_name, p2->f_name); 114 } 115 116 /* 117 * Sort the function table by function name. 118 * The sorting of the table above is ASCII dependent. 119 * On machines using EBCDIC we have to sort it. 120 */ 121 static void 122 sortFunctions(void) 123 { 124 int funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1; 125 126 qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name); 127 } 128 #endif 129 130 /* 131 * Initialize the global and v: variables. 132 */ 133 void 134 eval_init(void) 135 { 136 evalvars_init(); 137 func_init(); 138 139 #ifdef EBCDIC 140 /* 141 * Sort the function table, to enable binary search. 142 */ 143 sortFunctions(); 144 #endif 145 } 146 147 #if defined(EXITFREE) || defined(PROTO) 148 void 149 eval_clear(void) 150 { 151 evalvars_clear(); 152 153 free_scriptnames(); 154 free_locales(); 155 156 // autoloaded script names 157 free_autoload_scriptnames(); 158 159 // unreferenced lists and dicts 160 (void)garbage_collect(FALSE); 161 162 // functions not garbage collected 163 free_all_functions(); 164 } 165 #endif 166 167 /* 168 * Top level evaluation function, returning a boolean. 169 * Sets "error" to TRUE if there was an error. 170 * Return TRUE or FALSE. 171 */ 172 int 173 eval_to_bool( 174 char_u *arg, 175 int *error, 176 char_u **nextcmd, 177 int skip) /* only parse, don't execute */ 178 { 179 typval_T tv; 180 varnumber_T retval = FALSE; 181 182 if (skip) 183 ++emsg_skip; 184 if (eval0(arg, &tv, nextcmd, !skip) == FAIL) 185 *error = TRUE; 186 else 187 { 188 *error = FALSE; 189 if (!skip) 190 { 191 retval = (tv_get_number_chk(&tv, error) != 0); 192 clear_tv(&tv); 193 } 194 } 195 if (skip) 196 --emsg_skip; 197 198 return (int)retval; 199 } 200 201 /* 202 * Call eval1() and give an error message if not done at a lower level. 203 */ 204 static int 205 eval1_emsg(char_u **arg, typval_T *rettv, int evaluate) 206 { 207 char_u *start = *arg; 208 int ret; 209 int did_emsg_before = did_emsg; 210 int called_emsg_before = called_emsg; 211 212 ret = eval1(arg, rettv, evaluate); 213 if (ret == FAIL) 214 { 215 // Report the invalid expression unless the expression evaluation has 216 // been cancelled due to an aborting error, an interrupt, or an 217 // exception, or we already gave a more specific error. 218 // Also check called_emsg for when using assert_fails(). 219 if (!aborting() && did_emsg == did_emsg_before 220 && called_emsg == called_emsg_before) 221 semsg(_(e_invexpr2), start); 222 } 223 return ret; 224 } 225 226 int 227 eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv) 228 { 229 char_u *s; 230 char_u buf[NUMBUFLEN]; 231 funcexe_T funcexe; 232 233 if (expr->v_type == VAR_FUNC) 234 { 235 s = expr->vval.v_string; 236 if (s == NULL || *s == NUL) 237 return FAIL; 238 vim_memset(&funcexe, 0, sizeof(funcexe)); 239 funcexe.evaluate = TRUE; 240 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 241 return FAIL; 242 } 243 else if (expr->v_type == VAR_PARTIAL) 244 { 245 partial_T *partial = expr->vval.v_partial; 246 247 s = partial_name(partial); 248 if (s == NULL || *s == NUL) 249 return FAIL; 250 vim_memset(&funcexe, 0, sizeof(funcexe)); 251 funcexe.evaluate = TRUE; 252 funcexe.partial = partial; 253 if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL) 254 return FAIL; 255 } 256 else 257 { 258 s = tv_get_string_buf_chk(expr, buf); 259 if (s == NULL) 260 return FAIL; 261 s = skipwhite(s); 262 if (eval1_emsg(&s, rettv, TRUE) == FAIL) 263 return FAIL; 264 if (*s != NUL) /* check for trailing chars after expr */ 265 { 266 clear_tv(rettv); 267 semsg(_(e_invexpr2), s); 268 return FAIL; 269 } 270 } 271 return OK; 272 } 273 274 /* 275 * Like eval_to_bool() but using a typval_T instead of a string. 276 * Works for string, funcref and partial. 277 */ 278 int 279 eval_expr_to_bool(typval_T *expr, int *error) 280 { 281 typval_T rettv; 282 int res; 283 284 if (eval_expr_typval(expr, NULL, 0, &rettv) == FAIL) 285 { 286 *error = TRUE; 287 return FALSE; 288 } 289 res = (tv_get_number_chk(&rettv, error) != 0); 290 clear_tv(&rettv); 291 return res; 292 } 293 294 /* 295 * Top level evaluation function, returning a string. If "skip" is TRUE, 296 * only parsing to "nextcmd" is done, without reporting errors. Return 297 * pointer to allocated memory, or NULL for failure or when "skip" is TRUE. 298 */ 299 char_u * 300 eval_to_string_skip( 301 char_u *arg, 302 char_u **nextcmd, 303 int skip) /* only parse, don't execute */ 304 { 305 typval_T tv; 306 char_u *retval; 307 308 if (skip) 309 ++emsg_skip; 310 if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip) 311 retval = NULL; 312 else 313 { 314 retval = vim_strsave(tv_get_string(&tv)); 315 clear_tv(&tv); 316 } 317 if (skip) 318 --emsg_skip; 319 320 return retval; 321 } 322 323 /* 324 * Skip over an expression at "*pp". 325 * Return FAIL for an error, OK otherwise. 326 */ 327 int 328 skip_expr(char_u **pp) 329 { 330 typval_T rettv; 331 332 *pp = skipwhite(*pp); 333 return eval1(pp, &rettv, FALSE); 334 } 335 336 /* 337 * Top level evaluation function, returning a string. 338 * When "convert" is TRUE convert a List into a sequence of lines and convert 339 * a Float to a String. 340 * Return pointer to allocated memory, or NULL for failure. 341 */ 342 char_u * 343 eval_to_string( 344 char_u *arg, 345 char_u **nextcmd, 346 int convert) 347 { 348 typval_T tv; 349 char_u *retval; 350 garray_T ga; 351 #ifdef FEAT_FLOAT 352 char_u numbuf[NUMBUFLEN]; 353 #endif 354 355 if (eval0(arg, &tv, nextcmd, TRUE) == FAIL) 356 retval = NULL; 357 else 358 { 359 if (convert && tv.v_type == VAR_LIST) 360 { 361 ga_init2(&ga, (int)sizeof(char), 80); 362 if (tv.vval.v_list != NULL) 363 { 364 list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, FALSE, 0); 365 if (tv.vval.v_list->lv_len > 0) 366 ga_append(&ga, NL); 367 } 368 ga_append(&ga, NUL); 369 retval = (char_u *)ga.ga_data; 370 } 371 #ifdef FEAT_FLOAT 372 else if (convert && tv.v_type == VAR_FLOAT) 373 { 374 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float); 375 retval = vim_strsave(numbuf); 376 } 377 #endif 378 else 379 retval = vim_strsave(tv_get_string(&tv)); 380 clear_tv(&tv); 381 } 382 383 return retval; 384 } 385 386 /* 387 * Call eval_to_string() without using current local variables and using 388 * textlock. When "use_sandbox" is TRUE use the sandbox. 389 */ 390 char_u * 391 eval_to_string_safe( 392 char_u *arg, 393 char_u **nextcmd, 394 int use_sandbox) 395 { 396 char_u *retval; 397 funccal_entry_T funccal_entry; 398 399 save_funccal(&funccal_entry); 400 if (use_sandbox) 401 ++sandbox; 402 ++textlock; 403 retval = eval_to_string(arg, nextcmd, FALSE); 404 if (use_sandbox) 405 --sandbox; 406 --textlock; 407 restore_funccal(); 408 return retval; 409 } 410 411 /* 412 * Top level evaluation function, returning a number. 413 * Evaluates "expr" silently. 414 * Returns -1 for an error. 415 */ 416 varnumber_T 417 eval_to_number(char_u *expr) 418 { 419 typval_T rettv; 420 varnumber_T retval; 421 char_u *p = skipwhite(expr); 422 423 ++emsg_off; 424 425 if (eval1(&p, &rettv, TRUE) == FAIL) 426 retval = -1; 427 else 428 { 429 retval = tv_get_number_chk(&rettv, NULL); 430 clear_tv(&rettv); 431 } 432 --emsg_off; 433 434 return retval; 435 } 436 437 /* 438 * Top level evaluation function. 439 * Returns an allocated typval_T with the result. 440 * Returns NULL when there is an error. 441 */ 442 typval_T * 443 eval_expr(char_u *arg, char_u **nextcmd) 444 { 445 typval_T *tv; 446 447 tv = ALLOC_ONE(typval_T); 448 if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL) 449 VIM_CLEAR(tv); 450 451 return tv; 452 } 453 454 /* 455 * Call some Vim script function and return the result in "*rettv". 456 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] 457 * should have type VAR_UNKNOWN. 458 * Returns OK or FAIL. 459 */ 460 int 461 call_vim_function( 462 char_u *func, 463 int argc, 464 typval_T *argv, 465 typval_T *rettv) 466 { 467 int ret; 468 funcexe_T funcexe; 469 470 rettv->v_type = VAR_UNKNOWN; /* clear_tv() uses this */ 471 vim_memset(&funcexe, 0, sizeof(funcexe)); 472 funcexe.firstline = curwin->w_cursor.lnum; 473 funcexe.lastline = curwin->w_cursor.lnum; 474 funcexe.evaluate = TRUE; 475 ret = call_func(func, -1, rettv, argc, argv, &funcexe); 476 if (ret == FAIL) 477 clear_tv(rettv); 478 479 return ret; 480 } 481 482 /* 483 * Call Vim script function "func" and return the result as a number. 484 * Returns -1 when calling the function fails. 485 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 486 * have type VAR_UNKNOWN. 487 */ 488 varnumber_T 489 call_func_retnr( 490 char_u *func, 491 int argc, 492 typval_T *argv) 493 { 494 typval_T rettv; 495 varnumber_T retval; 496 497 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 498 return -1; 499 500 retval = tv_get_number_chk(&rettv, NULL); 501 clear_tv(&rettv); 502 return retval; 503 } 504 505 /* 506 * Call Vim script function "func" and return the result as a string. 507 * Returns NULL when calling the function fails. 508 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 509 * have type VAR_UNKNOWN. 510 */ 511 void * 512 call_func_retstr( 513 char_u *func, 514 int argc, 515 typval_T *argv) 516 { 517 typval_T rettv; 518 char_u *retval; 519 520 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 521 return NULL; 522 523 retval = vim_strsave(tv_get_string(&rettv)); 524 clear_tv(&rettv); 525 return retval; 526 } 527 528 /* 529 * Call Vim script function "func" and return the result as a List. 530 * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should 531 * have type VAR_UNKNOWN. 532 * Returns NULL when there is something wrong. 533 */ 534 void * 535 call_func_retlist( 536 char_u *func, 537 int argc, 538 typval_T *argv) 539 { 540 typval_T rettv; 541 542 if (call_vim_function(func, argc, argv, &rettv) == FAIL) 543 return NULL; 544 545 if (rettv.v_type != VAR_LIST) 546 { 547 clear_tv(&rettv); 548 return NULL; 549 } 550 551 return rettv.vval.v_list; 552 } 553 554 #ifdef FEAT_FOLDING 555 /* 556 * Evaluate 'foldexpr'. Returns the foldlevel, and any character preceding 557 * it in "*cp". Doesn't give error messages. 558 */ 559 int 560 eval_foldexpr(char_u *arg, int *cp) 561 { 562 typval_T tv; 563 varnumber_T retval; 564 char_u *s; 565 int use_sandbox = was_set_insecurely((char_u *)"foldexpr", 566 OPT_LOCAL); 567 568 ++emsg_off; 569 if (use_sandbox) 570 ++sandbox; 571 ++textlock; 572 *cp = NUL; 573 if (eval0(arg, &tv, NULL, TRUE) == FAIL) 574 retval = 0; 575 else 576 { 577 /* If the result is a number, just return the number. */ 578 if (tv.v_type == VAR_NUMBER) 579 retval = tv.vval.v_number; 580 else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL) 581 retval = 0; 582 else 583 { 584 /* If the result is a string, check if there is a non-digit before 585 * the number. */ 586 s = tv.vval.v_string; 587 if (!VIM_ISDIGIT(*s) && *s != '-') 588 *cp = *s++; 589 retval = atol((char *)s); 590 } 591 clear_tv(&tv); 592 } 593 --emsg_off; 594 if (use_sandbox) 595 --sandbox; 596 --textlock; 597 598 return (int)retval; 599 } 600 #endif 601 602 /* 603 * Get an lval: variable, Dict item or List item that can be assigned a value 604 * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]", 605 * "name.key", "name.key[expr]" etc. 606 * Indexing only works if "name" is an existing List or Dictionary. 607 * "name" points to the start of the name. 608 * If "rettv" is not NULL it points to the value to be assigned. 609 * "unlet" is TRUE for ":unlet": slightly different behavior when something is 610 * wrong; must end in space or cmd separator. 611 * 612 * flags: 613 * GLV_QUIET: do not give error messages 614 * GLV_READ_ONLY: will not change the variable 615 * GLV_NO_AUTOLOAD: do not use script autoloading 616 * 617 * Returns a pointer to just after the name, including indexes. 618 * When an evaluation error occurs "lp->ll_name" is NULL; 619 * Returns NULL for a parsing error. Still need to free items in "lp"! 620 */ 621 char_u * 622 get_lval( 623 char_u *name, 624 typval_T *rettv, 625 lval_T *lp, 626 int unlet, 627 int skip, 628 int flags, /* GLV_ values */ 629 int fne_flags) /* flags for find_name_end() */ 630 { 631 char_u *p; 632 char_u *expr_start, *expr_end; 633 int cc; 634 dictitem_T *v; 635 typval_T var1; 636 typval_T var2; 637 int empty1 = FALSE; 638 listitem_T *ni; 639 char_u *key = NULL; 640 int len; 641 hashtab_T *ht; 642 int quiet = flags & GLV_QUIET; 643 644 /* Clear everything in "lp". */ 645 vim_memset(lp, 0, sizeof(lval_T)); 646 647 if (skip) 648 { 649 /* When skipping just find the end of the name. */ 650 lp->ll_name = name; 651 return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags); 652 } 653 654 /* Find the end of the name. */ 655 p = find_name_end(name, &expr_start, &expr_end, fne_flags); 656 if (expr_start != NULL) 657 { 658 /* Don't expand the name when we already know there is an error. */ 659 if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p) 660 && *p != '[' && *p != '.') 661 { 662 emsg(_(e_trailing)); 663 return NULL; 664 } 665 666 lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p); 667 if (lp->ll_exp_name == NULL) 668 { 669 /* Report an invalid expression in braces, unless the 670 * expression evaluation has been cancelled due to an 671 * aborting error, an interrupt, or an exception. */ 672 if (!aborting() && !quiet) 673 { 674 emsg_severe = TRUE; 675 semsg(_(e_invarg2), name); 676 return NULL; 677 } 678 } 679 lp->ll_name = lp->ll_exp_name; 680 } 681 else 682 lp->ll_name = name; 683 684 /* Without [idx] or .key we are done. */ 685 if ((*p != '[' && *p != '.') || lp->ll_name == NULL) 686 return p; 687 688 cc = *p; 689 *p = NUL; 690 /* Only pass &ht when we would write to the variable, it prevents autoload 691 * as well. */ 692 v = find_var(lp->ll_name, (flags & GLV_READ_ONLY) ? NULL : &ht, 693 flags & GLV_NO_AUTOLOAD); 694 if (v == NULL && !quiet) 695 semsg(_(e_undefvar), lp->ll_name); 696 *p = cc; 697 if (v == NULL) 698 return NULL; 699 700 /* 701 * Loop until no more [idx] or .key is following. 702 */ 703 lp->ll_tv = &v->di_tv; 704 var1.v_type = VAR_UNKNOWN; 705 var2.v_type = VAR_UNKNOWN; 706 while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT)) 707 { 708 if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL) 709 && !(lp->ll_tv->v_type == VAR_DICT 710 && lp->ll_tv->vval.v_dict != NULL) 711 && !(lp->ll_tv->v_type == VAR_BLOB 712 && lp->ll_tv->vval.v_blob != NULL)) 713 { 714 if (!quiet) 715 emsg(_("E689: Can only index a List, Dictionary or Blob")); 716 return NULL; 717 } 718 if (lp->ll_range) 719 { 720 if (!quiet) 721 emsg(_("E708: [:] must come last")); 722 return NULL; 723 } 724 725 len = -1; 726 if (*p == '.') 727 { 728 key = p + 1; 729 for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len) 730 ; 731 if (len == 0) 732 { 733 if (!quiet) 734 emsg(_(e_emptykey)); 735 return NULL; 736 } 737 p = key + len; 738 } 739 else 740 { 741 /* Get the index [expr] or the first index [expr: ]. */ 742 p = skipwhite(p + 1); 743 if (*p == ':') 744 empty1 = TRUE; 745 else 746 { 747 empty1 = FALSE; 748 if (eval1(&p, &var1, TRUE) == FAIL) /* recursive! */ 749 return NULL; 750 if (tv_get_string_chk(&var1) == NULL) 751 { 752 /* not a number or string */ 753 clear_tv(&var1); 754 return NULL; 755 } 756 } 757 758 /* Optionally get the second index [ :expr]. */ 759 if (*p == ':') 760 { 761 if (lp->ll_tv->v_type == VAR_DICT) 762 { 763 if (!quiet) 764 emsg(_(e_dictrange)); 765 clear_tv(&var1); 766 return NULL; 767 } 768 if (rettv != NULL 769 && !(rettv->v_type == VAR_LIST 770 && rettv->vval.v_list != NULL) 771 && !(rettv->v_type == VAR_BLOB 772 && rettv->vval.v_blob != NULL)) 773 { 774 if (!quiet) 775 emsg(_("E709: [:] requires a List or Blob value")); 776 clear_tv(&var1); 777 return NULL; 778 } 779 p = skipwhite(p + 1); 780 if (*p == ']') 781 lp->ll_empty2 = TRUE; 782 else 783 { 784 lp->ll_empty2 = FALSE; 785 if (eval1(&p, &var2, TRUE) == FAIL) /* recursive! */ 786 { 787 clear_tv(&var1); 788 return NULL; 789 } 790 if (tv_get_string_chk(&var2) == NULL) 791 { 792 /* not a number or string */ 793 clear_tv(&var1); 794 clear_tv(&var2); 795 return NULL; 796 } 797 } 798 lp->ll_range = TRUE; 799 } 800 else 801 lp->ll_range = FALSE; 802 803 if (*p != ']') 804 { 805 if (!quiet) 806 emsg(_(e_missbrac)); 807 clear_tv(&var1); 808 clear_tv(&var2); 809 return NULL; 810 } 811 812 /* Skip to past ']'. */ 813 ++p; 814 } 815 816 if (lp->ll_tv->v_type == VAR_DICT) 817 { 818 if (len == -1) 819 { 820 /* "[key]": get key from "var1" */ 821 key = tv_get_string_chk(&var1); /* is number or string */ 822 if (key == NULL) 823 { 824 clear_tv(&var1); 825 return NULL; 826 } 827 } 828 lp->ll_list = NULL; 829 lp->ll_dict = lp->ll_tv->vval.v_dict; 830 lp->ll_di = dict_find(lp->ll_dict, key, len); 831 832 /* When assigning to a scope dictionary check that a function and 833 * variable name is valid (only variable name unless it is l: or 834 * g: dictionary). Disallow overwriting a builtin function. */ 835 if (rettv != NULL && lp->ll_dict->dv_scope != 0) 836 { 837 int prevval; 838 int wrong; 839 840 if (len != -1) 841 { 842 prevval = key[len]; 843 key[len] = NUL; 844 } 845 else 846 prevval = 0; /* avoid compiler warning */ 847 wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE 848 && rettv->v_type == VAR_FUNC 849 && var_check_func_name(key, lp->ll_di == NULL)) 850 || !valid_varname(key); 851 if (len != -1) 852 key[len] = prevval; 853 if (wrong) 854 return NULL; 855 } 856 857 if (lp->ll_di == NULL) 858 { 859 // Can't add "v:" or "a:" variable. 860 if (lp->ll_dict == get_vimvar_dict() 861 || &lp->ll_dict->dv_hashtab == get_funccal_args_ht()) 862 { 863 semsg(_(e_illvar), name); 864 clear_tv(&var1); 865 return NULL; 866 } 867 868 // Key does not exist in dict: may need to add it. 869 if (*p == '[' || *p == '.' || unlet) 870 { 871 if (!quiet) 872 semsg(_(e_dictkey), key); 873 clear_tv(&var1); 874 return NULL; 875 } 876 if (len == -1) 877 lp->ll_newkey = vim_strsave(key); 878 else 879 lp->ll_newkey = vim_strnsave(key, len); 880 clear_tv(&var1); 881 if (lp->ll_newkey == NULL) 882 p = NULL; 883 break; 884 } 885 /* existing variable, need to check if it can be changed */ 886 else if ((flags & GLV_READ_ONLY) == 0 887 && var_check_ro(lp->ll_di->di_flags, name, FALSE)) 888 { 889 clear_tv(&var1); 890 return NULL; 891 } 892 893 clear_tv(&var1); 894 lp->ll_tv = &lp->ll_di->di_tv; 895 } 896 else if (lp->ll_tv->v_type == VAR_BLOB) 897 { 898 long bloblen = blob_len(lp->ll_tv->vval.v_blob); 899 900 /* 901 * Get the number and item for the only or first index of the List. 902 */ 903 if (empty1) 904 lp->ll_n1 = 0; 905 else 906 // is number or string 907 lp->ll_n1 = (long)tv_get_number(&var1); 908 clear_tv(&var1); 909 910 if (lp->ll_n1 < 0 911 || lp->ll_n1 > bloblen 912 || (lp->ll_range && lp->ll_n1 == bloblen)) 913 { 914 if (!quiet) 915 semsg(_(e_blobidx), lp->ll_n1); 916 clear_tv(&var2); 917 return NULL; 918 } 919 if (lp->ll_range && !lp->ll_empty2) 920 { 921 lp->ll_n2 = (long)tv_get_number(&var2); 922 clear_tv(&var2); 923 if (lp->ll_n2 < 0 924 || lp->ll_n2 >= bloblen 925 || lp->ll_n2 < lp->ll_n1) 926 { 927 if (!quiet) 928 semsg(_(e_blobidx), lp->ll_n2); 929 return NULL; 930 } 931 } 932 lp->ll_blob = lp->ll_tv->vval.v_blob; 933 lp->ll_tv = NULL; 934 break; 935 } 936 else 937 { 938 /* 939 * Get the number and item for the only or first index of the List. 940 */ 941 if (empty1) 942 lp->ll_n1 = 0; 943 else 944 /* is number or string */ 945 lp->ll_n1 = (long)tv_get_number(&var1); 946 clear_tv(&var1); 947 948 lp->ll_dict = NULL; 949 lp->ll_list = lp->ll_tv->vval.v_list; 950 lp->ll_li = list_find(lp->ll_list, lp->ll_n1); 951 if (lp->ll_li == NULL) 952 { 953 if (lp->ll_n1 < 0) 954 { 955 lp->ll_n1 = 0; 956 lp->ll_li = list_find(lp->ll_list, lp->ll_n1); 957 } 958 } 959 if (lp->ll_li == NULL) 960 { 961 clear_tv(&var2); 962 if (!quiet) 963 semsg(_(e_listidx), lp->ll_n1); 964 return NULL; 965 } 966 967 /* 968 * May need to find the item or absolute index for the second 969 * index of a range. 970 * When no index given: "lp->ll_empty2" is TRUE. 971 * Otherwise "lp->ll_n2" is set to the second index. 972 */ 973 if (lp->ll_range && !lp->ll_empty2) 974 { 975 lp->ll_n2 = (long)tv_get_number(&var2); 976 /* is number or string */ 977 clear_tv(&var2); 978 if (lp->ll_n2 < 0) 979 { 980 ni = list_find(lp->ll_list, lp->ll_n2); 981 if (ni == NULL) 982 { 983 if (!quiet) 984 semsg(_(e_listidx), lp->ll_n2); 985 return NULL; 986 } 987 lp->ll_n2 = list_idx_of_item(lp->ll_list, ni); 988 } 989 990 /* Check that lp->ll_n2 isn't before lp->ll_n1. */ 991 if (lp->ll_n1 < 0) 992 lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li); 993 if (lp->ll_n2 < lp->ll_n1) 994 { 995 if (!quiet) 996 semsg(_(e_listidx), lp->ll_n2); 997 return NULL; 998 } 999 } 1000 1001 lp->ll_tv = &lp->ll_li->li_tv; 1002 } 1003 } 1004 1005 clear_tv(&var1); 1006 return p; 1007 } 1008 1009 /* 1010 * Clear lval "lp" that was filled by get_lval(). 1011 */ 1012 void 1013 clear_lval(lval_T *lp) 1014 { 1015 vim_free(lp->ll_exp_name); 1016 vim_free(lp->ll_newkey); 1017 } 1018 1019 /* 1020 * Set a variable that was parsed by get_lval() to "rettv". 1021 * "endp" points to just after the parsed name. 1022 * "op" is NULL, "+" for "+=", "-" for "-=", "*" for "*=", "/" for "/=", 1023 * "%" for "%=", "." for ".=" or "=" for "=". 1024 */ 1025 void 1026 set_var_lval( 1027 lval_T *lp, 1028 char_u *endp, 1029 typval_T *rettv, 1030 int copy, 1031 int is_const, // Disallow to modify existing variable for :const 1032 char_u *op) 1033 { 1034 int cc; 1035 listitem_T *ri; 1036 dictitem_T *di; 1037 1038 if (lp->ll_tv == NULL) 1039 { 1040 cc = *endp; 1041 *endp = NUL; 1042 if (lp->ll_blob != NULL) 1043 { 1044 int error = FALSE, val; 1045 1046 if (op != NULL && *op != '=') 1047 { 1048 semsg(_(e_letwrong), op); 1049 return; 1050 } 1051 1052 if (lp->ll_range && rettv->v_type == VAR_BLOB) 1053 { 1054 int il, ir; 1055 1056 if (lp->ll_empty2) 1057 lp->ll_n2 = blob_len(lp->ll_blob) - 1; 1058 1059 if (lp->ll_n2 - lp->ll_n1 + 1 != blob_len(rettv->vval.v_blob)) 1060 { 1061 emsg(_("E972: Blob value does not have the right number of bytes")); 1062 return; 1063 } 1064 if (lp->ll_empty2) 1065 lp->ll_n2 = blob_len(lp->ll_blob); 1066 1067 ir = 0; 1068 for (il = lp->ll_n1; il <= lp->ll_n2; il++) 1069 blob_set(lp->ll_blob, il, 1070 blob_get(rettv->vval.v_blob, ir++)); 1071 } 1072 else 1073 { 1074 val = (int)tv_get_number_chk(rettv, &error); 1075 if (!error) 1076 { 1077 garray_T *gap = &lp->ll_blob->bv_ga; 1078 1079 // Allow for appending a byte. Setting a byte beyond 1080 // the end is an error otherwise. 1081 if (lp->ll_n1 < gap->ga_len 1082 || (lp->ll_n1 == gap->ga_len 1083 && ga_grow(&lp->ll_blob->bv_ga, 1) == OK)) 1084 { 1085 blob_set(lp->ll_blob, lp->ll_n1, val); 1086 if (lp->ll_n1 == gap->ga_len) 1087 ++gap->ga_len; 1088 } 1089 // error for invalid range was already given in get_lval() 1090 } 1091 } 1092 } 1093 else if (op != NULL && *op != '=') 1094 { 1095 typval_T tv; 1096 1097 if (is_const) 1098 { 1099 emsg(_(e_cannot_mod)); 1100 *endp = cc; 1101 return; 1102 } 1103 1104 // handle +=, -=, *=, /=, %= and .= 1105 di = NULL; 1106 if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name), 1107 &tv, &di, TRUE, FALSE) == OK) 1108 { 1109 if ((di == NULL 1110 || (!var_check_ro(di->di_flags, lp->ll_name, FALSE) 1111 && !tv_check_lock(&di->di_tv, lp->ll_name, FALSE))) 1112 && tv_op(&tv, rettv, op) == OK) 1113 set_var(lp->ll_name, &tv, FALSE); 1114 clear_tv(&tv); 1115 } 1116 } 1117 else 1118 set_var_const(lp->ll_name, rettv, copy, is_const); 1119 *endp = cc; 1120 } 1121 else if (var_check_lock(lp->ll_newkey == NULL 1122 ? lp->ll_tv->v_lock 1123 : lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE)) 1124 ; 1125 else if (lp->ll_range) 1126 { 1127 listitem_T *ll_li = lp->ll_li; 1128 int ll_n1 = lp->ll_n1; 1129 1130 if (is_const) 1131 { 1132 emsg(_("E996: Cannot lock a range")); 1133 return; 1134 } 1135 1136 /* 1137 * Check whether any of the list items is locked 1138 */ 1139 for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; ) 1140 { 1141 if (var_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE)) 1142 return; 1143 ri = ri->li_next; 1144 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1)) 1145 break; 1146 ll_li = ll_li->li_next; 1147 ++ll_n1; 1148 } 1149 1150 /* 1151 * Assign the List values to the list items. 1152 */ 1153 for (ri = rettv->vval.v_list->lv_first; ri != NULL; ) 1154 { 1155 if (op != NULL && *op != '=') 1156 tv_op(&lp->ll_li->li_tv, &ri->li_tv, op); 1157 else 1158 { 1159 clear_tv(&lp->ll_li->li_tv); 1160 copy_tv(&ri->li_tv, &lp->ll_li->li_tv); 1161 } 1162 ri = ri->li_next; 1163 if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1)) 1164 break; 1165 if (lp->ll_li->li_next == NULL) 1166 { 1167 /* Need to add an empty item. */ 1168 if (list_append_number(lp->ll_list, 0) == FAIL) 1169 { 1170 ri = NULL; 1171 break; 1172 } 1173 } 1174 lp->ll_li = lp->ll_li->li_next; 1175 ++lp->ll_n1; 1176 } 1177 if (ri != NULL) 1178 emsg(_("E710: List value has more items than target")); 1179 else if (lp->ll_empty2 1180 ? (lp->ll_li != NULL && lp->ll_li->li_next != NULL) 1181 : lp->ll_n1 != lp->ll_n2) 1182 emsg(_("E711: List value has not enough items")); 1183 } 1184 else 1185 { 1186 /* 1187 * Assign to a List or Dictionary item. 1188 */ 1189 if (is_const) 1190 { 1191 emsg(_("E996: Cannot lock a list or dict")); 1192 return; 1193 } 1194 if (lp->ll_newkey != NULL) 1195 { 1196 if (op != NULL && *op != '=') 1197 { 1198 semsg(_(e_letwrong), op); 1199 return; 1200 } 1201 1202 /* Need to add an item to the Dictionary. */ 1203 di = dictitem_alloc(lp->ll_newkey); 1204 if (di == NULL) 1205 return; 1206 if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL) 1207 { 1208 vim_free(di); 1209 return; 1210 } 1211 lp->ll_tv = &di->di_tv; 1212 } 1213 else if (op != NULL && *op != '=') 1214 { 1215 tv_op(lp->ll_tv, rettv, op); 1216 return; 1217 } 1218 else 1219 clear_tv(lp->ll_tv); 1220 1221 /* 1222 * Assign the value to the variable or list item. 1223 */ 1224 if (copy) 1225 copy_tv(rettv, lp->ll_tv); 1226 else 1227 { 1228 *lp->ll_tv = *rettv; 1229 lp->ll_tv->v_lock = 0; 1230 init_tv(rettv); 1231 } 1232 } 1233 } 1234 1235 /* 1236 * Handle "tv1 += tv2", "tv1 -= tv2", "tv1 *= tv2", "tv1 /= tv2", "tv1 %= tv2" 1237 * and "tv1 .= tv2" 1238 * Returns OK or FAIL. 1239 */ 1240 static int 1241 tv_op(typval_T *tv1, typval_T *tv2, char_u *op) 1242 { 1243 varnumber_T n; 1244 char_u numbuf[NUMBUFLEN]; 1245 char_u *s; 1246 1247 /* Can't do anything with a Funcref, Dict, v:true on the right. */ 1248 if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT 1249 && tv2->v_type != VAR_SPECIAL) 1250 { 1251 switch (tv1->v_type) 1252 { 1253 case VAR_UNKNOWN: 1254 case VAR_DICT: 1255 case VAR_FUNC: 1256 case VAR_PARTIAL: 1257 case VAR_SPECIAL: 1258 case VAR_JOB: 1259 case VAR_CHANNEL: 1260 break; 1261 1262 case VAR_BLOB: 1263 if (*op != '+' || tv2->v_type != VAR_BLOB) 1264 break; 1265 // BLOB += BLOB 1266 if (tv1->vval.v_blob != NULL && tv2->vval.v_blob != NULL) 1267 { 1268 blob_T *b1 = tv1->vval.v_blob; 1269 blob_T *b2 = tv2->vval.v_blob; 1270 int i, len = blob_len(b2); 1271 for (i = 0; i < len; i++) 1272 ga_append(&b1->bv_ga, blob_get(b2, i)); 1273 } 1274 return OK; 1275 1276 case VAR_LIST: 1277 if (*op != '+' || tv2->v_type != VAR_LIST) 1278 break; 1279 // List += List 1280 if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL) 1281 list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL); 1282 return OK; 1283 1284 case VAR_NUMBER: 1285 case VAR_STRING: 1286 if (tv2->v_type == VAR_LIST) 1287 break; 1288 if (vim_strchr((char_u *)"+-*/%", *op) != NULL) 1289 { 1290 // nr += nr , nr -= nr , nr *=nr , nr /= nr , nr %= nr 1291 n = tv_get_number(tv1); 1292 #ifdef FEAT_FLOAT 1293 if (tv2->v_type == VAR_FLOAT) 1294 { 1295 float_T f = n; 1296 1297 if (*op == '%') 1298 break; 1299 switch (*op) 1300 { 1301 case '+': f += tv2->vval.v_float; break; 1302 case '-': f -= tv2->vval.v_float; break; 1303 case '*': f *= tv2->vval.v_float; break; 1304 case '/': f /= tv2->vval.v_float; break; 1305 } 1306 clear_tv(tv1); 1307 tv1->v_type = VAR_FLOAT; 1308 tv1->vval.v_float = f; 1309 } 1310 else 1311 #endif 1312 { 1313 switch (*op) 1314 { 1315 case '+': n += tv_get_number(tv2); break; 1316 case '-': n -= tv_get_number(tv2); break; 1317 case '*': n *= tv_get_number(tv2); break; 1318 case '/': n = num_divide(n, tv_get_number(tv2)); break; 1319 case '%': n = num_modulus(n, tv_get_number(tv2)); break; 1320 } 1321 clear_tv(tv1); 1322 tv1->v_type = VAR_NUMBER; 1323 tv1->vval.v_number = n; 1324 } 1325 } 1326 else 1327 { 1328 if (tv2->v_type == VAR_FLOAT) 1329 break; 1330 1331 // str .= str 1332 s = tv_get_string(tv1); 1333 s = concat_str(s, tv_get_string_buf(tv2, numbuf)); 1334 clear_tv(tv1); 1335 tv1->v_type = VAR_STRING; 1336 tv1->vval.v_string = s; 1337 } 1338 return OK; 1339 1340 case VAR_FLOAT: 1341 #ifdef FEAT_FLOAT 1342 { 1343 float_T f; 1344 1345 if (*op == '%' || *op == '.' 1346 || (tv2->v_type != VAR_FLOAT 1347 && tv2->v_type != VAR_NUMBER 1348 && tv2->v_type != VAR_STRING)) 1349 break; 1350 if (tv2->v_type == VAR_FLOAT) 1351 f = tv2->vval.v_float; 1352 else 1353 f = tv_get_number(tv2); 1354 switch (*op) 1355 { 1356 case '+': tv1->vval.v_float += f; break; 1357 case '-': tv1->vval.v_float -= f; break; 1358 case '*': tv1->vval.v_float *= f; break; 1359 case '/': tv1->vval.v_float /= f; break; 1360 } 1361 } 1362 #endif 1363 return OK; 1364 } 1365 } 1366 1367 semsg(_(e_letwrong), op); 1368 return FAIL; 1369 } 1370 1371 /* 1372 * Evaluate the expression used in a ":for var in expr" command. 1373 * "arg" points to "var". 1374 * Set "*errp" to TRUE for an error, FALSE otherwise; 1375 * Return a pointer that holds the info. Null when there is an error. 1376 */ 1377 void * 1378 eval_for_line( 1379 char_u *arg, 1380 int *errp, 1381 char_u **nextcmdp, 1382 int skip) 1383 { 1384 forinfo_T *fi; 1385 char_u *expr; 1386 typval_T tv; 1387 list_T *l; 1388 1389 *errp = TRUE; /* default: there is an error */ 1390 1391 fi = ALLOC_CLEAR_ONE(forinfo_T); 1392 if (fi == NULL) 1393 return NULL; 1394 1395 expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon); 1396 if (expr == NULL) 1397 return fi; 1398 1399 expr = skipwhite(expr); 1400 if (expr[0] != 'i' || expr[1] != 'n' || !VIM_ISWHITE(expr[2])) 1401 { 1402 emsg(_("E690: Missing \"in\" after :for")); 1403 return fi; 1404 } 1405 1406 if (skip) 1407 ++emsg_skip; 1408 if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK) 1409 { 1410 *errp = FALSE; 1411 if (!skip) 1412 { 1413 if (tv.v_type == VAR_LIST) 1414 { 1415 l = tv.vval.v_list; 1416 if (l == NULL) 1417 { 1418 // a null list is like an empty list: do nothing 1419 clear_tv(&tv); 1420 } 1421 else 1422 { 1423 // No need to increment the refcount, it's already set for 1424 // the list being used in "tv". 1425 fi->fi_list = l; 1426 list_add_watch(l, &fi->fi_lw); 1427 fi->fi_lw.lw_item = l->lv_first; 1428 } 1429 } 1430 else if (tv.v_type == VAR_BLOB) 1431 { 1432 fi->fi_bi = 0; 1433 if (tv.vval.v_blob != NULL) 1434 { 1435 typval_T btv; 1436 1437 // Make a copy, so that the iteration still works when the 1438 // blob is changed. 1439 blob_copy(&tv, &btv); 1440 fi->fi_blob = btv.vval.v_blob; 1441 } 1442 clear_tv(&tv); 1443 } 1444 else 1445 { 1446 emsg(_(e_listreq)); 1447 clear_tv(&tv); 1448 } 1449 } 1450 } 1451 if (skip) 1452 --emsg_skip; 1453 1454 return fi; 1455 } 1456 1457 /* 1458 * Use the first item in a ":for" list. Advance to the next. 1459 * Assign the values to the variable (list). "arg" points to the first one. 1460 * Return TRUE when a valid item was found, FALSE when at end of list or 1461 * something wrong. 1462 */ 1463 int 1464 next_for_item(void *fi_void, char_u *arg) 1465 { 1466 forinfo_T *fi = (forinfo_T *)fi_void; 1467 int result; 1468 listitem_T *item; 1469 1470 if (fi->fi_blob != NULL) 1471 { 1472 typval_T tv; 1473 1474 if (fi->fi_bi >= blob_len(fi->fi_blob)) 1475 return FALSE; 1476 tv.v_type = VAR_NUMBER; 1477 tv.v_lock = VAR_FIXED; 1478 tv.vval.v_number = blob_get(fi->fi_blob, fi->fi_bi); 1479 ++fi->fi_bi; 1480 return ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon, 1481 fi->fi_varcount, FALSE, NULL) == OK; 1482 } 1483 1484 item = fi->fi_lw.lw_item; 1485 if (item == NULL) 1486 result = FALSE; 1487 else 1488 { 1489 fi->fi_lw.lw_item = item->li_next; 1490 result = (ex_let_vars(arg, &item->li_tv, TRUE, fi->fi_semicolon, 1491 fi->fi_varcount, FALSE, NULL) == OK); 1492 } 1493 return result; 1494 } 1495 1496 /* 1497 * Free the structure used to store info used by ":for". 1498 */ 1499 void 1500 free_for_info(void *fi_void) 1501 { 1502 forinfo_T *fi = (forinfo_T *)fi_void; 1503 1504 if (fi != NULL && fi->fi_list != NULL) 1505 { 1506 list_rem_watch(fi->fi_list, &fi->fi_lw); 1507 list_unref(fi->fi_list); 1508 } 1509 if (fi != NULL && fi->fi_blob != NULL) 1510 blob_unref(fi->fi_blob); 1511 vim_free(fi); 1512 } 1513 1514 void 1515 set_context_for_expression( 1516 expand_T *xp, 1517 char_u *arg, 1518 cmdidx_T cmdidx) 1519 { 1520 int got_eq = FALSE; 1521 int c; 1522 char_u *p; 1523 1524 if (cmdidx == CMD_let) 1525 { 1526 xp->xp_context = EXPAND_USER_VARS; 1527 if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL) 1528 { 1529 /* ":let var1 var2 ...": find last space. */ 1530 for (p = arg + STRLEN(arg); p >= arg; ) 1531 { 1532 xp->xp_pattern = p; 1533 MB_PTR_BACK(arg, p); 1534 if (VIM_ISWHITE(*p)) 1535 break; 1536 } 1537 return; 1538 } 1539 } 1540 else 1541 xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS 1542 : EXPAND_EXPRESSION; 1543 while ((xp->xp_pattern = vim_strpbrk(arg, 1544 (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL) 1545 { 1546 c = *xp->xp_pattern; 1547 if (c == '&') 1548 { 1549 c = xp->xp_pattern[1]; 1550 if (c == '&') 1551 { 1552 ++xp->xp_pattern; 1553 xp->xp_context = cmdidx != CMD_let || got_eq 1554 ? EXPAND_EXPRESSION : EXPAND_NOTHING; 1555 } 1556 else if (c != ' ') 1557 { 1558 xp->xp_context = EXPAND_SETTINGS; 1559 if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':') 1560 xp->xp_pattern += 2; 1561 1562 } 1563 } 1564 else if (c == '$') 1565 { 1566 /* environment variable */ 1567 xp->xp_context = EXPAND_ENV_VARS; 1568 } 1569 else if (c == '=') 1570 { 1571 got_eq = TRUE; 1572 xp->xp_context = EXPAND_EXPRESSION; 1573 } 1574 else if (c == '#' 1575 && xp->xp_context == EXPAND_EXPRESSION) 1576 { 1577 /* Autoload function/variable contains '#'. */ 1578 break; 1579 } 1580 else if ((c == '<' || c == '#') 1581 && xp->xp_context == EXPAND_FUNCTIONS 1582 && vim_strchr(xp->xp_pattern, '(') == NULL) 1583 { 1584 /* Function name can start with "<SNR>" and contain '#'. */ 1585 break; 1586 } 1587 else if (cmdidx != CMD_let || got_eq) 1588 { 1589 if (c == '"') /* string */ 1590 { 1591 while ((c = *++xp->xp_pattern) != NUL && c != '"') 1592 if (c == '\\' && xp->xp_pattern[1] != NUL) 1593 ++xp->xp_pattern; 1594 xp->xp_context = EXPAND_NOTHING; 1595 } 1596 else if (c == '\'') /* literal string */ 1597 { 1598 /* Trick: '' is like stopping and starting a literal string. */ 1599 while ((c = *++xp->xp_pattern) != NUL && c != '\'') 1600 /* skip */ ; 1601 xp->xp_context = EXPAND_NOTHING; 1602 } 1603 else if (c == '|') 1604 { 1605 if (xp->xp_pattern[1] == '|') 1606 { 1607 ++xp->xp_pattern; 1608 xp->xp_context = EXPAND_EXPRESSION; 1609 } 1610 else 1611 xp->xp_context = EXPAND_COMMANDS; 1612 } 1613 else 1614 xp->xp_context = EXPAND_EXPRESSION; 1615 } 1616 else 1617 /* Doesn't look like something valid, expand as an expression 1618 * anyway. */ 1619 xp->xp_context = EXPAND_EXPRESSION; 1620 arg = xp->xp_pattern; 1621 if (*arg != NUL) 1622 while ((c = *++arg) != NUL && (c == ' ' || c == '\t')) 1623 /* skip */ ; 1624 } 1625 xp->xp_pattern = arg; 1626 } 1627 1628 /* 1629 * Return TRUE if "pat" matches "text". 1630 * Does not use 'cpo' and always uses 'magic'. 1631 */ 1632 int 1633 pattern_match(char_u *pat, char_u *text, int ic) 1634 { 1635 int matches = FALSE; 1636 char_u *save_cpo; 1637 regmatch_T regmatch; 1638 1639 /* avoid 'l' flag in 'cpoptions' */ 1640 save_cpo = p_cpo; 1641 p_cpo = (char_u *)""; 1642 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 1643 if (regmatch.regprog != NULL) 1644 { 1645 regmatch.rm_ic = ic; 1646 matches = vim_regexec_nl(®match, text, (colnr_T)0); 1647 vim_regfree(regmatch.regprog); 1648 } 1649 p_cpo = save_cpo; 1650 return matches; 1651 } 1652 1653 /* 1654 * Handle a name followed by "(". Both for just "name(arg)" and for 1655 * "expr->name(arg)". 1656 * Returns OK or FAIL. 1657 */ 1658 static int 1659 eval_func( 1660 char_u **arg, // points to "(", will be advanced 1661 char_u *name, 1662 int name_len, 1663 typval_T *rettv, 1664 int evaluate, 1665 typval_T *basetv) // "expr" for "expr->name(arg)" 1666 { 1667 char_u *s = name; 1668 int len = name_len; 1669 partial_T *partial; 1670 int ret = OK; 1671 1672 if (!evaluate) 1673 check_vars(s, len); 1674 1675 /* If "s" is the name of a variable of type VAR_FUNC 1676 * use its contents. */ 1677 s = deref_func_name(s, &len, &partial, !evaluate); 1678 1679 /* Need to make a copy, in case evaluating the arguments makes 1680 * the name invalid. */ 1681 s = vim_strsave(s); 1682 if (s == NULL) 1683 ret = FAIL; 1684 else 1685 { 1686 funcexe_T funcexe; 1687 1688 // Invoke the function. 1689 vim_memset(&funcexe, 0, sizeof(funcexe)); 1690 funcexe.firstline = curwin->w_cursor.lnum; 1691 funcexe.lastline = curwin->w_cursor.lnum; 1692 funcexe.evaluate = evaluate; 1693 funcexe.partial = partial; 1694 funcexe.basetv = basetv; 1695 ret = get_func_tv(s, len, rettv, arg, &funcexe); 1696 } 1697 vim_free(s); 1698 1699 /* If evaluate is FALSE rettv->v_type was not set in 1700 * get_func_tv, but it's needed in handle_subscript() to parse 1701 * what follows. So set it here. */ 1702 if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(') 1703 { 1704 rettv->vval.v_string = NULL; 1705 rettv->v_type = VAR_FUNC; 1706 } 1707 1708 /* Stop the expression evaluation when immediately 1709 * aborting on error, or when an interrupt occurred or 1710 * an exception was thrown but not caught. */ 1711 if (evaluate && aborting()) 1712 { 1713 if (ret == OK) 1714 clear_tv(rettv); 1715 ret = FAIL; 1716 } 1717 return ret; 1718 } 1719 1720 /* 1721 * The "evaluate" argument: When FALSE, the argument is only parsed but not 1722 * executed. The function may return OK, but the rettv will be of type 1723 * VAR_UNKNOWN. The function still returns FAIL for a syntax error. 1724 */ 1725 1726 /* 1727 * Handle zero level expression. 1728 * This calls eval1() and handles error message and nextcmd. 1729 * Put the result in "rettv" when returning OK and "evaluate" is TRUE. 1730 * Note: "rettv.v_lock" is not set. 1731 * Return OK or FAIL. 1732 */ 1733 int 1734 eval0( 1735 char_u *arg, 1736 typval_T *rettv, 1737 char_u **nextcmd, 1738 int evaluate) 1739 { 1740 int ret; 1741 char_u *p; 1742 int did_emsg_before = did_emsg; 1743 int called_emsg_before = called_emsg; 1744 1745 p = skipwhite(arg); 1746 ret = eval1(&p, rettv, evaluate); 1747 if (ret == FAIL || !ends_excmd(*p)) 1748 { 1749 if (ret != FAIL) 1750 clear_tv(rettv); 1751 /* 1752 * Report the invalid expression unless the expression evaluation has 1753 * been cancelled due to an aborting error, an interrupt, or an 1754 * exception, or we already gave a more specific error. 1755 * Also check called_emsg for when using assert_fails(). 1756 */ 1757 if (!aborting() && did_emsg == did_emsg_before 1758 && called_emsg == called_emsg_before) 1759 semsg(_(e_invexpr2), arg); 1760 ret = FAIL; 1761 } 1762 if (nextcmd != NULL) 1763 *nextcmd = check_nextcmd(p); 1764 1765 return ret; 1766 } 1767 1768 /* 1769 * Handle top level expression: 1770 * expr2 ? expr1 : expr1 1771 * 1772 * "arg" must point to the first non-white of the expression. 1773 * "arg" is advanced to the next non-white after the recognized expression. 1774 * 1775 * Note: "rettv.v_lock" is not set. 1776 * 1777 * Return OK or FAIL. 1778 */ 1779 int 1780 eval1(char_u **arg, typval_T *rettv, int evaluate) 1781 { 1782 int result; 1783 typval_T var2; 1784 1785 /* 1786 * Get the first variable. 1787 */ 1788 if (eval2(arg, rettv, evaluate) == FAIL) 1789 return FAIL; 1790 1791 if ((*arg)[0] == '?') 1792 { 1793 result = FALSE; 1794 if (evaluate) 1795 { 1796 int error = FALSE; 1797 1798 if (tv_get_number_chk(rettv, &error) != 0) 1799 result = TRUE; 1800 clear_tv(rettv); 1801 if (error) 1802 return FAIL; 1803 } 1804 1805 /* 1806 * Get the second variable. 1807 */ 1808 *arg = skipwhite(*arg + 1); 1809 if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */ 1810 return FAIL; 1811 1812 /* 1813 * Check for the ":". 1814 */ 1815 if ((*arg)[0] != ':') 1816 { 1817 emsg(_("E109: Missing ':' after '?'")); 1818 if (evaluate && result) 1819 clear_tv(rettv); 1820 return FAIL; 1821 } 1822 1823 /* 1824 * Get the third variable. 1825 */ 1826 *arg = skipwhite(*arg + 1); 1827 if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */ 1828 { 1829 if (evaluate && result) 1830 clear_tv(rettv); 1831 return FAIL; 1832 } 1833 if (evaluate && !result) 1834 *rettv = var2; 1835 } 1836 1837 return OK; 1838 } 1839 1840 /* 1841 * Handle first level expression: 1842 * expr2 || expr2 || expr2 logical OR 1843 * 1844 * "arg" must point to the first non-white of the expression. 1845 * "arg" is advanced to the next non-white after the recognized expression. 1846 * 1847 * Return OK or FAIL. 1848 */ 1849 static int 1850 eval2(char_u **arg, typval_T *rettv, int evaluate) 1851 { 1852 typval_T var2; 1853 long result; 1854 int first; 1855 int error = FALSE; 1856 1857 /* 1858 * Get the first variable. 1859 */ 1860 if (eval3(arg, rettv, evaluate) == FAIL) 1861 return FAIL; 1862 1863 /* 1864 * Repeat until there is no following "||". 1865 */ 1866 first = TRUE; 1867 result = FALSE; 1868 while ((*arg)[0] == '|' && (*arg)[1] == '|') 1869 { 1870 if (evaluate && first) 1871 { 1872 if (tv_get_number_chk(rettv, &error) != 0) 1873 result = TRUE; 1874 clear_tv(rettv); 1875 if (error) 1876 return FAIL; 1877 first = FALSE; 1878 } 1879 1880 /* 1881 * Get the second variable. 1882 */ 1883 *arg = skipwhite(*arg + 2); 1884 if (eval3(arg, &var2, evaluate && !result) == FAIL) 1885 return FAIL; 1886 1887 /* 1888 * Compute the result. 1889 */ 1890 if (evaluate && !result) 1891 { 1892 if (tv_get_number_chk(&var2, &error) != 0) 1893 result = TRUE; 1894 clear_tv(&var2); 1895 if (error) 1896 return FAIL; 1897 } 1898 if (evaluate) 1899 { 1900 rettv->v_type = VAR_NUMBER; 1901 rettv->vval.v_number = result; 1902 } 1903 } 1904 1905 return OK; 1906 } 1907 1908 /* 1909 * Handle second level expression: 1910 * expr3 && expr3 && expr3 logical AND 1911 * 1912 * "arg" must point to the first non-white of the expression. 1913 * "arg" is advanced to the next non-white after the recognized expression. 1914 * 1915 * Return OK or FAIL. 1916 */ 1917 static int 1918 eval3(char_u **arg, typval_T *rettv, int evaluate) 1919 { 1920 typval_T var2; 1921 long result; 1922 int first; 1923 int error = FALSE; 1924 1925 /* 1926 * Get the first variable. 1927 */ 1928 if (eval4(arg, rettv, evaluate) == FAIL) 1929 return FAIL; 1930 1931 /* 1932 * Repeat until there is no following "&&". 1933 */ 1934 first = TRUE; 1935 result = TRUE; 1936 while ((*arg)[0] == '&' && (*arg)[1] == '&') 1937 { 1938 if (evaluate && first) 1939 { 1940 if (tv_get_number_chk(rettv, &error) == 0) 1941 result = FALSE; 1942 clear_tv(rettv); 1943 if (error) 1944 return FAIL; 1945 first = FALSE; 1946 } 1947 1948 /* 1949 * Get the second variable. 1950 */ 1951 *arg = skipwhite(*arg + 2); 1952 if (eval4(arg, &var2, evaluate && result) == FAIL) 1953 return FAIL; 1954 1955 /* 1956 * Compute the result. 1957 */ 1958 if (evaluate && result) 1959 { 1960 if (tv_get_number_chk(&var2, &error) == 0) 1961 result = FALSE; 1962 clear_tv(&var2); 1963 if (error) 1964 return FAIL; 1965 } 1966 if (evaluate) 1967 { 1968 rettv->v_type = VAR_NUMBER; 1969 rettv->vval.v_number = result; 1970 } 1971 } 1972 1973 return OK; 1974 } 1975 1976 /* 1977 * Handle third level expression: 1978 * var1 == var2 1979 * var1 =~ var2 1980 * var1 != var2 1981 * var1 !~ var2 1982 * var1 > var2 1983 * var1 >= var2 1984 * var1 < var2 1985 * var1 <= var2 1986 * var1 is var2 1987 * var1 isnot var2 1988 * 1989 * "arg" must point to the first non-white of the expression. 1990 * "arg" is advanced to the next non-white after the recognized expression. 1991 * 1992 * Return OK or FAIL. 1993 */ 1994 static int 1995 eval4(char_u **arg, typval_T *rettv, int evaluate) 1996 { 1997 typval_T var2; 1998 char_u *p; 1999 int i; 2000 exptype_T type = TYPE_UNKNOWN; 2001 int type_is = FALSE; /* TRUE for "is" and "isnot" */ 2002 int len = 2; 2003 int ic; 2004 2005 /* 2006 * Get the first variable. 2007 */ 2008 if (eval5(arg, rettv, evaluate) == FAIL) 2009 return FAIL; 2010 2011 p = *arg; 2012 switch (p[0]) 2013 { 2014 case '=': if (p[1] == '=') 2015 type = TYPE_EQUAL; 2016 else if (p[1] == '~') 2017 type = TYPE_MATCH; 2018 break; 2019 case '!': if (p[1] == '=') 2020 type = TYPE_NEQUAL; 2021 else if (p[1] == '~') 2022 type = TYPE_NOMATCH; 2023 break; 2024 case '>': if (p[1] != '=') 2025 { 2026 type = TYPE_GREATER; 2027 len = 1; 2028 } 2029 else 2030 type = TYPE_GEQUAL; 2031 break; 2032 case '<': if (p[1] != '=') 2033 { 2034 type = TYPE_SMALLER; 2035 len = 1; 2036 } 2037 else 2038 type = TYPE_SEQUAL; 2039 break; 2040 case 'i': if (p[1] == 's') 2041 { 2042 if (p[2] == 'n' && p[3] == 'o' && p[4] == 't') 2043 len = 5; 2044 i = p[len]; 2045 if (!isalnum(i) && i != '_') 2046 { 2047 type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL; 2048 type_is = TRUE; 2049 } 2050 } 2051 break; 2052 } 2053 2054 /* 2055 * If there is a comparative operator, use it. 2056 */ 2057 if (type != TYPE_UNKNOWN) 2058 { 2059 /* extra question mark appended: ignore case */ 2060 if (p[len] == '?') 2061 { 2062 ic = TRUE; 2063 ++len; 2064 } 2065 /* extra '#' appended: match case */ 2066 else if (p[len] == '#') 2067 { 2068 ic = FALSE; 2069 ++len; 2070 } 2071 /* nothing appended: use 'ignorecase' */ 2072 else 2073 ic = p_ic; 2074 2075 /* 2076 * Get the second variable. 2077 */ 2078 *arg = skipwhite(p + len); 2079 if (eval5(arg, &var2, evaluate) == FAIL) 2080 { 2081 clear_tv(rettv); 2082 return FAIL; 2083 } 2084 if (evaluate) 2085 { 2086 int ret = typval_compare(rettv, &var2, type, type_is, ic); 2087 2088 clear_tv(&var2); 2089 return ret; 2090 } 2091 } 2092 2093 return OK; 2094 } 2095 2096 /* 2097 * Handle fourth level expression: 2098 * + number addition 2099 * - number subtraction 2100 * . string concatenation (if script version is 1) 2101 * .. string concatenation 2102 * 2103 * "arg" must point to the first non-white of the expression. 2104 * "arg" is advanced to the next non-white after the recognized expression. 2105 * 2106 * Return OK or FAIL. 2107 */ 2108 static int 2109 eval5(char_u **arg, typval_T *rettv, int evaluate) 2110 { 2111 typval_T var2; 2112 typval_T var3; 2113 int op; 2114 varnumber_T n1, n2; 2115 #ifdef FEAT_FLOAT 2116 float_T f1 = 0, f2 = 0; 2117 #endif 2118 char_u *s1, *s2; 2119 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 2120 char_u *p; 2121 int concat; 2122 2123 /* 2124 * Get the first variable. 2125 */ 2126 if (eval6(arg, rettv, evaluate, FALSE) == FAIL) 2127 return FAIL; 2128 2129 /* 2130 * Repeat computing, until no '+', '-' or '.' is following. 2131 */ 2132 for (;;) 2133 { 2134 // "." is only string concatenation when scriptversion is 1 2135 op = **arg; 2136 concat = op == '.' 2137 && (*(*arg + 1) == '.' || current_sctx.sc_version < 2); 2138 if (op != '+' && op != '-' && !concat) 2139 break; 2140 2141 if ((op != '+' || (rettv->v_type != VAR_LIST 2142 && rettv->v_type != VAR_BLOB)) 2143 #ifdef FEAT_FLOAT 2144 && (op == '.' || rettv->v_type != VAR_FLOAT) 2145 #endif 2146 ) 2147 { 2148 /* For "list + ...", an illegal use of the first operand as 2149 * a number cannot be determined before evaluating the 2nd 2150 * operand: if this is also a list, all is ok. 2151 * For "something . ...", "something - ..." or "non-list + ...", 2152 * we know that the first operand needs to be a string or number 2153 * without evaluating the 2nd operand. So check before to avoid 2154 * side effects after an error. */ 2155 if (evaluate && tv_get_string_chk(rettv) == NULL) 2156 { 2157 clear_tv(rettv); 2158 return FAIL; 2159 } 2160 } 2161 2162 /* 2163 * Get the second variable. 2164 */ 2165 if (op == '.' && *(*arg + 1) == '.') // .. string concatenation 2166 ++*arg; 2167 *arg = skipwhite(*arg + 1); 2168 if (eval6(arg, &var2, evaluate, op == '.') == FAIL) 2169 { 2170 clear_tv(rettv); 2171 return FAIL; 2172 } 2173 2174 if (evaluate) 2175 { 2176 /* 2177 * Compute the result. 2178 */ 2179 if (op == '.') 2180 { 2181 s1 = tv_get_string_buf(rettv, buf1); /* already checked */ 2182 s2 = tv_get_string_buf_chk(&var2, buf2); 2183 if (s2 == NULL) /* type error ? */ 2184 { 2185 clear_tv(rettv); 2186 clear_tv(&var2); 2187 return FAIL; 2188 } 2189 p = concat_str(s1, s2); 2190 clear_tv(rettv); 2191 rettv->v_type = VAR_STRING; 2192 rettv->vval.v_string = p; 2193 } 2194 else if (op == '+' && rettv->v_type == VAR_BLOB 2195 && var2.v_type == VAR_BLOB) 2196 { 2197 blob_T *b1 = rettv->vval.v_blob; 2198 blob_T *b2 = var2.vval.v_blob; 2199 blob_T *b = blob_alloc(); 2200 int i; 2201 2202 if (b != NULL) 2203 { 2204 for (i = 0; i < blob_len(b1); i++) 2205 ga_append(&b->bv_ga, blob_get(b1, i)); 2206 for (i = 0; i < blob_len(b2); i++) 2207 ga_append(&b->bv_ga, blob_get(b2, i)); 2208 2209 clear_tv(rettv); 2210 rettv_blob_set(rettv, b); 2211 } 2212 } 2213 else if (op == '+' && rettv->v_type == VAR_LIST 2214 && var2.v_type == VAR_LIST) 2215 { 2216 /* concatenate Lists */ 2217 if (list_concat(rettv->vval.v_list, var2.vval.v_list, 2218 &var3) == FAIL) 2219 { 2220 clear_tv(rettv); 2221 clear_tv(&var2); 2222 return FAIL; 2223 } 2224 clear_tv(rettv); 2225 *rettv = var3; 2226 } 2227 else 2228 { 2229 int error = FALSE; 2230 2231 #ifdef FEAT_FLOAT 2232 if (rettv->v_type == VAR_FLOAT) 2233 { 2234 f1 = rettv->vval.v_float; 2235 n1 = 0; 2236 } 2237 else 2238 #endif 2239 { 2240 n1 = tv_get_number_chk(rettv, &error); 2241 if (error) 2242 { 2243 /* This can only happen for "list + non-list". For 2244 * "non-list + ..." or "something - ...", we returned 2245 * before evaluating the 2nd operand. */ 2246 clear_tv(rettv); 2247 return FAIL; 2248 } 2249 #ifdef FEAT_FLOAT 2250 if (var2.v_type == VAR_FLOAT) 2251 f1 = n1; 2252 #endif 2253 } 2254 #ifdef FEAT_FLOAT 2255 if (var2.v_type == VAR_FLOAT) 2256 { 2257 f2 = var2.vval.v_float; 2258 n2 = 0; 2259 } 2260 else 2261 #endif 2262 { 2263 n2 = tv_get_number_chk(&var2, &error); 2264 if (error) 2265 { 2266 clear_tv(rettv); 2267 clear_tv(&var2); 2268 return FAIL; 2269 } 2270 #ifdef FEAT_FLOAT 2271 if (rettv->v_type == VAR_FLOAT) 2272 f2 = n2; 2273 #endif 2274 } 2275 clear_tv(rettv); 2276 2277 #ifdef FEAT_FLOAT 2278 /* If there is a float on either side the result is a float. */ 2279 if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT) 2280 { 2281 if (op == '+') 2282 f1 = f1 + f2; 2283 else 2284 f1 = f1 - f2; 2285 rettv->v_type = VAR_FLOAT; 2286 rettv->vval.v_float = f1; 2287 } 2288 else 2289 #endif 2290 { 2291 if (op == '+') 2292 n1 = n1 + n2; 2293 else 2294 n1 = n1 - n2; 2295 rettv->v_type = VAR_NUMBER; 2296 rettv->vval.v_number = n1; 2297 } 2298 } 2299 clear_tv(&var2); 2300 } 2301 } 2302 return OK; 2303 } 2304 2305 /* 2306 * Handle fifth level expression: 2307 * * number multiplication 2308 * / number division 2309 * % number modulo 2310 * 2311 * "arg" must point to the first non-white of the expression. 2312 * "arg" is advanced to the next non-white after the recognized expression. 2313 * 2314 * Return OK or FAIL. 2315 */ 2316 static int 2317 eval6( 2318 char_u **arg, 2319 typval_T *rettv, 2320 int evaluate, 2321 int want_string) /* after "." operator */ 2322 { 2323 typval_T var2; 2324 int op; 2325 varnumber_T n1, n2; 2326 #ifdef FEAT_FLOAT 2327 int use_float = FALSE; 2328 float_T f1 = 0, f2 = 0; 2329 #endif 2330 int error = FALSE; 2331 2332 /* 2333 * Get the first variable. 2334 */ 2335 if (eval7(arg, rettv, evaluate, want_string) == FAIL) 2336 return FAIL; 2337 2338 /* 2339 * Repeat computing, until no '*', '/' or '%' is following. 2340 */ 2341 for (;;) 2342 { 2343 op = **arg; 2344 if (op != '*' && op != '/' && op != '%') 2345 break; 2346 2347 if (evaluate) 2348 { 2349 #ifdef FEAT_FLOAT 2350 if (rettv->v_type == VAR_FLOAT) 2351 { 2352 f1 = rettv->vval.v_float; 2353 use_float = TRUE; 2354 n1 = 0; 2355 } 2356 else 2357 #endif 2358 n1 = tv_get_number_chk(rettv, &error); 2359 clear_tv(rettv); 2360 if (error) 2361 return FAIL; 2362 } 2363 else 2364 n1 = 0; 2365 2366 /* 2367 * Get the second variable. 2368 */ 2369 *arg = skipwhite(*arg + 1); 2370 if (eval7(arg, &var2, evaluate, FALSE) == FAIL) 2371 return FAIL; 2372 2373 if (evaluate) 2374 { 2375 #ifdef FEAT_FLOAT 2376 if (var2.v_type == VAR_FLOAT) 2377 { 2378 if (!use_float) 2379 { 2380 f1 = n1; 2381 use_float = TRUE; 2382 } 2383 f2 = var2.vval.v_float; 2384 n2 = 0; 2385 } 2386 else 2387 #endif 2388 { 2389 n2 = tv_get_number_chk(&var2, &error); 2390 clear_tv(&var2); 2391 if (error) 2392 return FAIL; 2393 #ifdef FEAT_FLOAT 2394 if (use_float) 2395 f2 = n2; 2396 #endif 2397 } 2398 2399 /* 2400 * Compute the result. 2401 * When either side is a float the result is a float. 2402 */ 2403 #ifdef FEAT_FLOAT 2404 if (use_float) 2405 { 2406 if (op == '*') 2407 f1 = f1 * f2; 2408 else if (op == '/') 2409 { 2410 # ifdef VMS 2411 /* VMS crashes on divide by zero, work around it */ 2412 if (f2 == 0.0) 2413 { 2414 if (f1 == 0) 2415 f1 = -1 * __F_FLT_MAX - 1L; /* similar to NaN */ 2416 else if (f1 < 0) 2417 f1 = -1 * __F_FLT_MAX; 2418 else 2419 f1 = __F_FLT_MAX; 2420 } 2421 else 2422 f1 = f1 / f2; 2423 # else 2424 /* We rely on the floating point library to handle divide 2425 * by zero to result in "inf" and not a crash. */ 2426 f1 = f1 / f2; 2427 # endif 2428 } 2429 else 2430 { 2431 emsg(_("E804: Cannot use '%' with Float")); 2432 return FAIL; 2433 } 2434 rettv->v_type = VAR_FLOAT; 2435 rettv->vval.v_float = f1; 2436 } 2437 else 2438 #endif 2439 { 2440 if (op == '*') 2441 n1 = n1 * n2; 2442 else if (op == '/') 2443 n1 = num_divide(n1, n2); 2444 else 2445 n1 = num_modulus(n1, n2); 2446 2447 rettv->v_type = VAR_NUMBER; 2448 rettv->vval.v_number = n1; 2449 } 2450 } 2451 } 2452 2453 return OK; 2454 } 2455 2456 /* 2457 * Handle sixth level expression: 2458 * number number constant 2459 * 0zFFFFFFFF Blob constant 2460 * "string" string constant 2461 * 'string' literal string constant 2462 * &option-name option value 2463 * @r register contents 2464 * identifier variable value 2465 * function() function call 2466 * $VAR environment variable 2467 * (expression) nested expression 2468 * [expr, expr] List 2469 * {key: val, key: val} Dictionary 2470 * #{key: val, key: val} Dictionary with literal keys 2471 * 2472 * Also handle: 2473 * ! in front logical NOT 2474 * - in front unary minus 2475 * + in front unary plus (ignored) 2476 * trailing [] subscript in String or List 2477 * trailing .name entry in Dictionary 2478 * trailing ->name() method call 2479 * 2480 * "arg" must point to the first non-white of the expression. 2481 * "arg" is advanced to the next non-white after the recognized expression. 2482 * 2483 * Return OK or FAIL. 2484 */ 2485 static int 2486 eval7( 2487 char_u **arg, 2488 typval_T *rettv, 2489 int evaluate, 2490 int want_string UNUSED) /* after "." operator */ 2491 { 2492 varnumber_T n; 2493 int len; 2494 char_u *s; 2495 char_u *start_leader, *end_leader; 2496 int ret = OK; 2497 char_u *alias; 2498 2499 /* 2500 * Initialise variable so that clear_tv() can't mistake this for a 2501 * string and free a string that isn't there. 2502 */ 2503 rettv->v_type = VAR_UNKNOWN; 2504 2505 /* 2506 * Skip '!', '-' and '+' characters. They are handled later. 2507 */ 2508 start_leader = *arg; 2509 while (**arg == '!' || **arg == '-' || **arg == '+') 2510 *arg = skipwhite(*arg + 1); 2511 end_leader = *arg; 2512 2513 if (**arg == '.' && (!isdigit(*(*arg + 1)) 2514 #ifdef FEAT_FLOAT 2515 || current_sctx.sc_version < 2 2516 #endif 2517 )) 2518 { 2519 semsg(_(e_invexpr2), *arg); 2520 ++*arg; 2521 return FAIL; 2522 } 2523 2524 switch (**arg) 2525 { 2526 /* 2527 * Number constant. 2528 */ 2529 case '0': 2530 case '1': 2531 case '2': 2532 case '3': 2533 case '4': 2534 case '5': 2535 case '6': 2536 case '7': 2537 case '8': 2538 case '9': 2539 case '.': 2540 { 2541 #ifdef FEAT_FLOAT 2542 char_u *p; 2543 int get_float = FALSE; 2544 2545 /* We accept a float when the format matches 2546 * "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?". This is very 2547 * strict to avoid backwards compatibility problems. 2548 * With script version 2 and later the leading digit can be 2549 * omitted. 2550 * Don't look for a float after the "." operator, so that 2551 * ":let vers = 1.2.3" doesn't fail. */ 2552 if (**arg == '.') 2553 p = *arg; 2554 else 2555 p = skipdigits(*arg + 1); 2556 if (!want_string && p[0] == '.' && vim_isdigit(p[1])) 2557 { 2558 get_float = TRUE; 2559 p = skipdigits(p + 2); 2560 if (*p == 'e' || *p == 'E') 2561 { 2562 ++p; 2563 if (*p == '-' || *p == '+') 2564 ++p; 2565 if (!vim_isdigit(*p)) 2566 get_float = FALSE; 2567 else 2568 p = skipdigits(p + 1); 2569 } 2570 if (ASCII_ISALPHA(*p) || *p == '.') 2571 get_float = FALSE; 2572 } 2573 if (get_float) 2574 { 2575 float_T f; 2576 2577 *arg += string2float(*arg, &f); 2578 if (evaluate) 2579 { 2580 rettv->v_type = VAR_FLOAT; 2581 rettv->vval.v_float = f; 2582 } 2583 } 2584 else 2585 #endif 2586 if (**arg == '0' && ((*arg)[1] == 'z' || (*arg)[1] == 'Z')) 2587 { 2588 char_u *bp; 2589 blob_T *blob = NULL; // init for gcc 2590 2591 // Blob constant: 0z0123456789abcdef 2592 if (evaluate) 2593 blob = blob_alloc(); 2594 for (bp = *arg + 2; vim_isxdigit(bp[0]); bp += 2) 2595 { 2596 if (!vim_isxdigit(bp[1])) 2597 { 2598 if (blob != NULL) 2599 { 2600 emsg(_("E973: Blob literal should have an even number of hex characters")); 2601 ga_clear(&blob->bv_ga); 2602 VIM_CLEAR(blob); 2603 } 2604 ret = FAIL; 2605 break; 2606 } 2607 if (blob != NULL) 2608 ga_append(&blob->bv_ga, 2609 (hex2nr(*bp) << 4) + hex2nr(*(bp+1))); 2610 if (bp[2] == '.' && vim_isxdigit(bp[3])) 2611 ++bp; 2612 } 2613 if (blob != NULL) 2614 rettv_blob_set(rettv, blob); 2615 *arg = bp; 2616 } 2617 else 2618 { 2619 // decimal, hex or octal number 2620 vim_str2nr(*arg, NULL, &len, current_sctx.sc_version >= 4 2621 ? STR2NR_NO_OCT + STR2NR_QUOTE 2622 : STR2NR_ALL, &n, NULL, 0, TRUE); 2623 if (len == 0) 2624 { 2625 semsg(_(e_invexpr2), *arg); 2626 ret = FAIL; 2627 break; 2628 } 2629 *arg += len; 2630 if (evaluate) 2631 { 2632 rettv->v_type = VAR_NUMBER; 2633 rettv->vval.v_number = n; 2634 } 2635 } 2636 break; 2637 } 2638 2639 /* 2640 * String constant: "string". 2641 */ 2642 case '"': ret = get_string_tv(arg, rettv, evaluate); 2643 break; 2644 2645 /* 2646 * Literal string constant: 'str''ing'. 2647 */ 2648 case '\'': ret = get_lit_string_tv(arg, rettv, evaluate); 2649 break; 2650 2651 /* 2652 * List: [expr, expr] 2653 */ 2654 case '[': ret = get_list_tv(arg, rettv, evaluate); 2655 break; 2656 2657 /* 2658 * Dictionary: #{key: val, key: val} 2659 */ 2660 case '#': if ((*arg)[1] == '{') 2661 { 2662 ++*arg; 2663 ret = dict_get_tv(arg, rettv, evaluate, TRUE); 2664 } 2665 else 2666 ret = NOTDONE; 2667 break; 2668 2669 /* 2670 * Lambda: {arg, arg -> expr} 2671 * Dictionary: {'key': val, 'key': val} 2672 */ 2673 case '{': ret = get_lambda_tv(arg, rettv, evaluate); 2674 if (ret == NOTDONE) 2675 ret = dict_get_tv(arg, rettv, evaluate, FALSE); 2676 break; 2677 2678 /* 2679 * Option value: &name 2680 */ 2681 case '&': ret = get_option_tv(arg, rettv, evaluate); 2682 break; 2683 2684 /* 2685 * Environment variable: $VAR. 2686 */ 2687 case '$': ret = get_env_tv(arg, rettv, evaluate); 2688 break; 2689 2690 /* 2691 * Register contents: @r. 2692 */ 2693 case '@': ++*arg; 2694 if (evaluate) 2695 { 2696 rettv->v_type = VAR_STRING; 2697 rettv->vval.v_string = get_reg_contents(**arg, 2698 GREG_EXPR_SRC); 2699 } 2700 if (**arg != NUL) 2701 ++*arg; 2702 break; 2703 2704 /* 2705 * nested expression: (expression). 2706 */ 2707 case '(': *arg = skipwhite(*arg + 1); 2708 ret = eval1(arg, rettv, evaluate); /* recursive! */ 2709 if (**arg == ')') 2710 ++*arg; 2711 else if (ret == OK) 2712 { 2713 emsg(_("E110: Missing ')'")); 2714 clear_tv(rettv); 2715 ret = FAIL; 2716 } 2717 break; 2718 2719 default: ret = NOTDONE; 2720 break; 2721 } 2722 2723 if (ret == NOTDONE) 2724 { 2725 /* 2726 * Must be a variable or function name. 2727 * Can also be a curly-braces kind of name: {expr}. 2728 */ 2729 s = *arg; 2730 len = get_name_len(arg, &alias, evaluate, TRUE); 2731 if (alias != NULL) 2732 s = alias; 2733 2734 if (len <= 0) 2735 ret = FAIL; 2736 else 2737 { 2738 if (**arg == '(') /* recursive! */ 2739 ret = eval_func(arg, s, len, rettv, evaluate, NULL); 2740 else if (evaluate) 2741 ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE); 2742 else 2743 { 2744 check_vars(s, len); 2745 ret = OK; 2746 } 2747 } 2748 vim_free(alias); 2749 } 2750 2751 *arg = skipwhite(*arg); 2752 2753 /* Handle following '[', '(' and '.' for expr[expr], expr.name, 2754 * expr(expr), expr->name(expr) */ 2755 if (ret == OK) 2756 ret = handle_subscript(arg, rettv, evaluate, TRUE, 2757 start_leader, &end_leader); 2758 2759 /* 2760 * Apply logical NOT and unary '-', from right to left, ignore '+'. 2761 */ 2762 if (ret == OK && evaluate && end_leader > start_leader) 2763 ret = eval7_leader(rettv, start_leader, &end_leader); 2764 return ret; 2765 } 2766 2767 /* 2768 * Apply the leading "!" and "-" before an eval7 expression to "rettv". 2769 * Adjusts "end_leaderp" until it is at "start_leader". 2770 */ 2771 static int 2772 eval7_leader(typval_T *rettv, char_u *start_leader, char_u **end_leaderp) 2773 { 2774 char_u *end_leader = *end_leaderp; 2775 int ret = OK; 2776 int error = FALSE; 2777 varnumber_T val = 0; 2778 #ifdef FEAT_FLOAT 2779 float_T f = 0.0; 2780 2781 if (rettv->v_type == VAR_FLOAT) 2782 f = rettv->vval.v_float; 2783 else 2784 #endif 2785 val = tv_get_number_chk(rettv, &error); 2786 if (error) 2787 { 2788 clear_tv(rettv); 2789 ret = FAIL; 2790 } 2791 else 2792 { 2793 while (end_leader > start_leader) 2794 { 2795 --end_leader; 2796 if (*end_leader == '!') 2797 { 2798 #ifdef FEAT_FLOAT 2799 if (rettv->v_type == VAR_FLOAT) 2800 f = !f; 2801 else 2802 #endif 2803 val = !val; 2804 } 2805 else if (*end_leader == '-') 2806 { 2807 #ifdef FEAT_FLOAT 2808 if (rettv->v_type == VAR_FLOAT) 2809 f = -f; 2810 else 2811 #endif 2812 val = -val; 2813 } 2814 } 2815 #ifdef FEAT_FLOAT 2816 if (rettv->v_type == VAR_FLOAT) 2817 { 2818 clear_tv(rettv); 2819 rettv->vval.v_float = f; 2820 } 2821 else 2822 #endif 2823 { 2824 clear_tv(rettv); 2825 rettv->v_type = VAR_NUMBER; 2826 rettv->vval.v_number = val; 2827 } 2828 } 2829 *end_leaderp = end_leader; 2830 return ret; 2831 } 2832 2833 /* 2834 * Call the function referred to in "rettv". 2835 */ 2836 static int 2837 call_func_rettv( 2838 char_u **arg, 2839 typval_T *rettv, 2840 int evaluate, 2841 dict_T *selfdict, 2842 typval_T *basetv) 2843 { 2844 partial_T *pt = NULL; 2845 funcexe_T funcexe; 2846 typval_T functv; 2847 char_u *s; 2848 int ret; 2849 2850 // need to copy the funcref so that we can clear rettv 2851 if (evaluate) 2852 { 2853 functv = *rettv; 2854 rettv->v_type = VAR_UNKNOWN; 2855 2856 /* Invoke the function. Recursive! */ 2857 if (functv.v_type == VAR_PARTIAL) 2858 { 2859 pt = functv.vval.v_partial; 2860 s = partial_name(pt); 2861 } 2862 else 2863 s = functv.vval.v_string; 2864 } 2865 else 2866 s = (char_u *)""; 2867 2868 vim_memset(&funcexe, 0, sizeof(funcexe)); 2869 funcexe.firstline = curwin->w_cursor.lnum; 2870 funcexe.lastline = curwin->w_cursor.lnum; 2871 funcexe.evaluate = evaluate; 2872 funcexe.partial = pt; 2873 funcexe.selfdict = selfdict; 2874 funcexe.basetv = basetv; 2875 ret = get_func_tv(s, -1, rettv, arg, &funcexe); 2876 2877 /* Clear the funcref afterwards, so that deleting it while 2878 * evaluating the arguments is possible (see test55). */ 2879 if (evaluate) 2880 clear_tv(&functv); 2881 2882 return ret; 2883 } 2884 2885 /* 2886 * Evaluate "->method()". 2887 * "*arg" points to the '-'. 2888 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 2889 */ 2890 static int 2891 eval_lambda( 2892 char_u **arg, 2893 typval_T *rettv, 2894 int evaluate, 2895 int verbose) /* give error messages */ 2896 { 2897 typval_T base = *rettv; 2898 int ret; 2899 2900 // Skip over the ->. 2901 *arg += 2; 2902 rettv->v_type = VAR_UNKNOWN; 2903 2904 ret = get_lambda_tv(arg, rettv, evaluate); 2905 if (ret == NOTDONE) 2906 return FAIL; 2907 else if (**arg != '(') 2908 { 2909 if (verbose) 2910 { 2911 if (*skipwhite(*arg) == '(') 2912 semsg(_(e_nowhitespace)); 2913 else 2914 semsg(_(e_missingparen), "lambda"); 2915 } 2916 clear_tv(rettv); 2917 return FAIL; 2918 } 2919 return call_func_rettv(arg, rettv, evaluate, NULL, &base); 2920 } 2921 2922 /* 2923 * Evaluate "->method()". 2924 * "*arg" points to the '-'. 2925 * Returns FAIL or OK. "*arg" is advanced to after the ')'. 2926 */ 2927 static int 2928 eval_method( 2929 char_u **arg, 2930 typval_T *rettv, 2931 int evaluate, 2932 int verbose) /* give error messages */ 2933 { 2934 char_u *name; 2935 long len; 2936 char_u *alias; 2937 typval_T base = *rettv; 2938 int ret; 2939 2940 // Skip over the ->. 2941 *arg += 2; 2942 rettv->v_type = VAR_UNKNOWN; 2943 2944 name = *arg; 2945 len = get_name_len(arg, &alias, evaluate, TRUE); 2946 if (alias != NULL) 2947 name = alias; 2948 2949 if (len <= 0) 2950 { 2951 if (verbose) 2952 emsg(_("E260: Missing name after ->")); 2953 ret = FAIL; 2954 } 2955 else 2956 { 2957 if (**arg != '(') 2958 { 2959 if (verbose) 2960 semsg(_(e_missingparen), name); 2961 ret = FAIL; 2962 } 2963 else if (VIM_ISWHITE((*arg)[-1])) 2964 { 2965 if (verbose) 2966 semsg(_(e_nowhitespace)); 2967 ret = FAIL; 2968 } 2969 else 2970 ret = eval_func(arg, name, len, rettv, evaluate, &base); 2971 } 2972 2973 // Clear the funcref afterwards, so that deleting it while 2974 // evaluating the arguments is possible (see test55). 2975 if (evaluate) 2976 clear_tv(&base); 2977 2978 return ret; 2979 } 2980 2981 /* 2982 * Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key". 2983 * "*arg" points to the '[' or '.'. 2984 * Returns FAIL or OK. "*arg" is advanced to after the ']'. 2985 */ 2986 static int 2987 eval_index( 2988 char_u **arg, 2989 typval_T *rettv, 2990 int evaluate, 2991 int verbose) /* give error messages */ 2992 { 2993 int empty1 = FALSE, empty2 = FALSE; 2994 typval_T var1, var2; 2995 long i; 2996 long n1, n2 = 0; 2997 long len = -1; 2998 int range = FALSE; 2999 char_u *s; 3000 char_u *key = NULL; 3001 3002 switch (rettv->v_type) 3003 { 3004 case VAR_FUNC: 3005 case VAR_PARTIAL: 3006 if (verbose) 3007 emsg(_("E695: Cannot index a Funcref")); 3008 return FAIL; 3009 case VAR_FLOAT: 3010 #ifdef FEAT_FLOAT 3011 if (verbose) 3012 emsg(_(e_float_as_string)); 3013 return FAIL; 3014 #endif 3015 case VAR_SPECIAL: 3016 case VAR_JOB: 3017 case VAR_CHANNEL: 3018 if (verbose) 3019 emsg(_("E909: Cannot index a special variable")); 3020 return FAIL; 3021 case VAR_UNKNOWN: 3022 if (evaluate) 3023 return FAIL; 3024 /* FALLTHROUGH */ 3025 3026 case VAR_STRING: 3027 case VAR_NUMBER: 3028 case VAR_LIST: 3029 case VAR_DICT: 3030 case VAR_BLOB: 3031 break; 3032 } 3033 3034 init_tv(&var1); 3035 init_tv(&var2); 3036 if (**arg == '.') 3037 { 3038 /* 3039 * dict.name 3040 */ 3041 key = *arg + 1; 3042 for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len) 3043 ; 3044 if (len == 0) 3045 return FAIL; 3046 *arg = skipwhite(key + len); 3047 } 3048 else 3049 { 3050 /* 3051 * something[idx] 3052 * 3053 * Get the (first) variable from inside the []. 3054 */ 3055 *arg = skipwhite(*arg + 1); 3056 if (**arg == ':') 3057 empty1 = TRUE; 3058 else if (eval1(arg, &var1, evaluate) == FAIL) /* recursive! */ 3059 return FAIL; 3060 else if (evaluate && tv_get_string_chk(&var1) == NULL) 3061 { 3062 /* not a number or string */ 3063 clear_tv(&var1); 3064 return FAIL; 3065 } 3066 3067 /* 3068 * Get the second variable from inside the [:]. 3069 */ 3070 if (**arg == ':') 3071 { 3072 range = TRUE; 3073 *arg = skipwhite(*arg + 1); 3074 if (**arg == ']') 3075 empty2 = TRUE; 3076 else if (eval1(arg, &var2, evaluate) == FAIL) /* recursive! */ 3077 { 3078 if (!empty1) 3079 clear_tv(&var1); 3080 return FAIL; 3081 } 3082 else if (evaluate && tv_get_string_chk(&var2) == NULL) 3083 { 3084 /* not a number or string */ 3085 if (!empty1) 3086 clear_tv(&var1); 3087 clear_tv(&var2); 3088 return FAIL; 3089 } 3090 } 3091 3092 /* Check for the ']'. */ 3093 if (**arg != ']') 3094 { 3095 if (verbose) 3096 emsg(_(e_missbrac)); 3097 clear_tv(&var1); 3098 if (range) 3099 clear_tv(&var2); 3100 return FAIL; 3101 } 3102 *arg = skipwhite(*arg + 1); /* skip the ']' */ 3103 } 3104 3105 if (evaluate) 3106 { 3107 n1 = 0; 3108 if (!empty1 && rettv->v_type != VAR_DICT) 3109 { 3110 n1 = tv_get_number(&var1); 3111 clear_tv(&var1); 3112 } 3113 if (range) 3114 { 3115 if (empty2) 3116 n2 = -1; 3117 else 3118 { 3119 n2 = tv_get_number(&var2); 3120 clear_tv(&var2); 3121 } 3122 } 3123 3124 switch (rettv->v_type) 3125 { 3126 case VAR_UNKNOWN: 3127 case VAR_FUNC: 3128 case VAR_PARTIAL: 3129 case VAR_FLOAT: 3130 case VAR_SPECIAL: 3131 case VAR_JOB: 3132 case VAR_CHANNEL: 3133 break; /* not evaluating, skipping over subscript */ 3134 3135 case VAR_NUMBER: 3136 case VAR_STRING: 3137 s = tv_get_string(rettv); 3138 len = (long)STRLEN(s); 3139 if (range) 3140 { 3141 /* The resulting variable is a substring. If the indexes 3142 * are out of range the result is empty. */ 3143 if (n1 < 0) 3144 { 3145 n1 = len + n1; 3146 if (n1 < 0) 3147 n1 = 0; 3148 } 3149 if (n2 < 0) 3150 n2 = len + n2; 3151 else if (n2 >= len) 3152 n2 = len; 3153 if (n1 >= len || n2 < 0 || n1 > n2) 3154 s = NULL; 3155 else 3156 s = vim_strnsave(s + n1, (int)(n2 - n1 + 1)); 3157 } 3158 else 3159 { 3160 /* The resulting variable is a string of a single 3161 * character. If the index is too big or negative the 3162 * result is empty. */ 3163 if (n1 >= len || n1 < 0) 3164 s = NULL; 3165 else 3166 s = vim_strnsave(s + n1, 1); 3167 } 3168 clear_tv(rettv); 3169 rettv->v_type = VAR_STRING; 3170 rettv->vval.v_string = s; 3171 break; 3172 3173 case VAR_BLOB: 3174 len = blob_len(rettv->vval.v_blob); 3175 if (range) 3176 { 3177 // The resulting variable is a sub-blob. If the indexes 3178 // are out of range the result is empty. 3179 if (n1 < 0) 3180 { 3181 n1 = len + n1; 3182 if (n1 < 0) 3183 n1 = 0; 3184 } 3185 if (n2 < 0) 3186 n2 = len + n2; 3187 else if (n2 >= len) 3188 n2 = len - 1; 3189 if (n1 >= len || n2 < 0 || n1 > n2) 3190 { 3191 clear_tv(rettv); 3192 rettv->v_type = VAR_BLOB; 3193 rettv->vval.v_blob = NULL; 3194 } 3195 else 3196 { 3197 blob_T *blob = blob_alloc(); 3198 3199 if (blob != NULL) 3200 { 3201 if (ga_grow(&blob->bv_ga, n2 - n1 + 1) == FAIL) 3202 { 3203 blob_free(blob); 3204 return FAIL; 3205 } 3206 blob->bv_ga.ga_len = n2 - n1 + 1; 3207 for (i = n1; i <= n2; i++) 3208 blob_set(blob, i - n1, 3209 blob_get(rettv->vval.v_blob, i)); 3210 3211 clear_tv(rettv); 3212 rettv_blob_set(rettv, blob); 3213 } 3214 } 3215 } 3216 else 3217 { 3218 // The resulting variable is a byte value. 3219 // If the index is too big or negative that is an error. 3220 if (n1 < 0) 3221 n1 = len + n1; 3222 if (n1 < len && n1 >= 0) 3223 { 3224 int v = blob_get(rettv->vval.v_blob, n1); 3225 3226 clear_tv(rettv); 3227 rettv->v_type = VAR_NUMBER; 3228 rettv->vval.v_number = v; 3229 } 3230 else 3231 semsg(_(e_blobidx), n1); 3232 } 3233 break; 3234 3235 case VAR_LIST: 3236 len = list_len(rettv->vval.v_list); 3237 if (n1 < 0) 3238 n1 = len + n1; 3239 if (!empty1 && (n1 < 0 || n1 >= len)) 3240 { 3241 /* For a range we allow invalid values and return an empty 3242 * list. A list index out of range is an error. */ 3243 if (!range) 3244 { 3245 if (verbose) 3246 semsg(_(e_listidx), n1); 3247 return FAIL; 3248 } 3249 n1 = len; 3250 } 3251 if (range) 3252 { 3253 list_T *l; 3254 listitem_T *item; 3255 3256 if (n2 < 0) 3257 n2 = len + n2; 3258 else if (n2 >= len) 3259 n2 = len - 1; 3260 if (!empty2 && (n2 < 0 || n2 + 1 < n1)) 3261 n2 = -1; 3262 l = list_alloc(); 3263 if (l == NULL) 3264 return FAIL; 3265 for (item = list_find(rettv->vval.v_list, n1); 3266 n1 <= n2; ++n1) 3267 { 3268 if (list_append_tv(l, &item->li_tv) == FAIL) 3269 { 3270 list_free(l); 3271 return FAIL; 3272 } 3273 item = item->li_next; 3274 } 3275 clear_tv(rettv); 3276 rettv_list_set(rettv, l); 3277 } 3278 else 3279 { 3280 copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1); 3281 clear_tv(rettv); 3282 *rettv = var1; 3283 } 3284 break; 3285 3286 case VAR_DICT: 3287 if (range) 3288 { 3289 if (verbose) 3290 emsg(_(e_dictrange)); 3291 if (len == -1) 3292 clear_tv(&var1); 3293 return FAIL; 3294 } 3295 { 3296 dictitem_T *item; 3297 3298 if (len == -1) 3299 { 3300 key = tv_get_string_chk(&var1); 3301 if (key == NULL) 3302 { 3303 clear_tv(&var1); 3304 return FAIL; 3305 } 3306 } 3307 3308 item = dict_find(rettv->vval.v_dict, key, (int)len); 3309 3310 if (item == NULL && verbose) 3311 semsg(_(e_dictkey), key); 3312 if (len == -1) 3313 clear_tv(&var1); 3314 if (item == NULL) 3315 return FAIL; 3316 3317 copy_tv(&item->di_tv, &var1); 3318 clear_tv(rettv); 3319 *rettv = var1; 3320 } 3321 break; 3322 } 3323 } 3324 3325 return OK; 3326 } 3327 3328 /* 3329 * Get an option value. 3330 * "arg" points to the '&' or '+' before the option name. 3331 * "arg" is advanced to character after the option name. 3332 * Return OK or FAIL. 3333 */ 3334 int 3335 get_option_tv( 3336 char_u **arg, 3337 typval_T *rettv, /* when NULL, only check if option exists */ 3338 int evaluate) 3339 { 3340 char_u *option_end; 3341 long numval; 3342 char_u *stringval; 3343 int opt_type; 3344 int c; 3345 int working = (**arg == '+'); /* has("+option") */ 3346 int ret = OK; 3347 int opt_flags; 3348 3349 /* 3350 * Isolate the option name and find its value. 3351 */ 3352 option_end = find_option_end(arg, &opt_flags); 3353 if (option_end == NULL) 3354 { 3355 if (rettv != NULL) 3356 semsg(_("E112: Option name missing: %s"), *arg); 3357 return FAIL; 3358 } 3359 3360 if (!evaluate) 3361 { 3362 *arg = option_end; 3363 return OK; 3364 } 3365 3366 c = *option_end; 3367 *option_end = NUL; 3368 opt_type = get_option_value(*arg, &numval, 3369 rettv == NULL ? NULL : &stringval, opt_flags); 3370 3371 if (opt_type == -3) /* invalid name */ 3372 { 3373 if (rettv != NULL) 3374 semsg(_("E113: Unknown option: %s"), *arg); 3375 ret = FAIL; 3376 } 3377 else if (rettv != NULL) 3378 { 3379 if (opt_type == -2) /* hidden string option */ 3380 { 3381 rettv->v_type = VAR_STRING; 3382 rettv->vval.v_string = NULL; 3383 } 3384 else if (opt_type == -1) /* hidden number option */ 3385 { 3386 rettv->v_type = VAR_NUMBER; 3387 rettv->vval.v_number = 0; 3388 } 3389 else if (opt_type == 1) /* number option */ 3390 { 3391 rettv->v_type = VAR_NUMBER; 3392 rettv->vval.v_number = numval; 3393 } 3394 else /* string option */ 3395 { 3396 rettv->v_type = VAR_STRING; 3397 rettv->vval.v_string = stringval; 3398 } 3399 } 3400 else if (working && (opt_type == -2 || opt_type == -1)) 3401 ret = FAIL; 3402 3403 *option_end = c; /* put back for error messages */ 3404 *arg = option_end; 3405 3406 return ret; 3407 } 3408 3409 /* 3410 * Allocate a variable for a string constant. 3411 * Return OK or FAIL. 3412 */ 3413 static int 3414 get_string_tv(char_u **arg, typval_T *rettv, int evaluate) 3415 { 3416 char_u *p; 3417 char_u *name; 3418 int extra = 0; 3419 3420 /* 3421 * Find the end of the string, skipping backslashed characters. 3422 */ 3423 for (p = *arg + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p)) 3424 { 3425 if (*p == '\\' && p[1] != NUL) 3426 { 3427 ++p; 3428 /* A "\<x>" form occupies at least 4 characters, and produces up 3429 * to 6 characters: reserve space for 2 extra */ 3430 if (*p == '<') 3431 extra += 2; 3432 } 3433 } 3434 3435 if (*p != '"') 3436 { 3437 semsg(_("E114: Missing quote: %s"), *arg); 3438 return FAIL; 3439 } 3440 3441 /* If only parsing, set *arg and return here */ 3442 if (!evaluate) 3443 { 3444 *arg = p + 1; 3445 return OK; 3446 } 3447 3448 /* 3449 * Copy the string into allocated memory, handling backslashed 3450 * characters. 3451 */ 3452 name = alloc(p - *arg + extra); 3453 if (name == NULL) 3454 return FAIL; 3455 rettv->v_type = VAR_STRING; 3456 rettv->vval.v_string = name; 3457 3458 for (p = *arg + 1; *p != NUL && *p != '"'; ) 3459 { 3460 if (*p == '\\') 3461 { 3462 switch (*++p) 3463 { 3464 case 'b': *name++ = BS; ++p; break; 3465 case 'e': *name++ = ESC; ++p; break; 3466 case 'f': *name++ = FF; ++p; break; 3467 case 'n': *name++ = NL; ++p; break; 3468 case 'r': *name++ = CAR; ++p; break; 3469 case 't': *name++ = TAB; ++p; break; 3470 3471 case 'X': /* hex: "\x1", "\x12" */ 3472 case 'x': 3473 case 'u': /* Unicode: "\u0023" */ 3474 case 'U': 3475 if (vim_isxdigit(p[1])) 3476 { 3477 int n, nr; 3478 int c = toupper(*p); 3479 3480 if (c == 'X') 3481 n = 2; 3482 else if (*p == 'u') 3483 n = 4; 3484 else 3485 n = 8; 3486 nr = 0; 3487 while (--n >= 0 && vim_isxdigit(p[1])) 3488 { 3489 ++p; 3490 nr = (nr << 4) + hex2nr(*p); 3491 } 3492 ++p; 3493 /* For "\u" store the number according to 3494 * 'encoding'. */ 3495 if (c != 'X') 3496 name += (*mb_char2bytes)(nr, name); 3497 else 3498 *name++ = nr; 3499 } 3500 break; 3501 3502 /* octal: "\1", "\12", "\123" */ 3503 case '0': 3504 case '1': 3505 case '2': 3506 case '3': 3507 case '4': 3508 case '5': 3509 case '6': 3510 case '7': *name = *p++ - '0'; 3511 if (*p >= '0' && *p <= '7') 3512 { 3513 *name = (*name << 3) + *p++ - '0'; 3514 if (*p >= '0' && *p <= '7') 3515 *name = (*name << 3) + *p++ - '0'; 3516 } 3517 ++name; 3518 break; 3519 3520 /* Special key, e.g.: "\<C-W>" */ 3521 case '<': extra = trans_special(&p, name, TRUE, TRUE); 3522 if (extra != 0) 3523 { 3524 name += extra; 3525 break; 3526 } 3527 /* FALLTHROUGH */ 3528 3529 default: MB_COPY_CHAR(p, name); 3530 break; 3531 } 3532 } 3533 else 3534 MB_COPY_CHAR(p, name); 3535 3536 } 3537 *name = NUL; 3538 if (*p != NUL) /* just in case */ 3539 ++p; 3540 *arg = p; 3541 3542 return OK; 3543 } 3544 3545 /* 3546 * Allocate a variable for a 'str''ing' constant. 3547 * Return OK or FAIL. 3548 */ 3549 static int 3550 get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate) 3551 { 3552 char_u *p; 3553 char_u *str; 3554 int reduce = 0; 3555 3556 /* 3557 * Find the end of the string, skipping ''. 3558 */ 3559 for (p = *arg + 1; *p != NUL; MB_PTR_ADV(p)) 3560 { 3561 if (*p == '\'') 3562 { 3563 if (p[1] != '\'') 3564 break; 3565 ++reduce; 3566 ++p; 3567 } 3568 } 3569 3570 if (*p != '\'') 3571 { 3572 semsg(_("E115: Missing quote: %s"), *arg); 3573 return FAIL; 3574 } 3575 3576 /* If only parsing return after setting "*arg" */ 3577 if (!evaluate) 3578 { 3579 *arg = p + 1; 3580 return OK; 3581 } 3582 3583 /* 3584 * Copy the string into allocated memory, handling '' to ' reduction. 3585 */ 3586 str = alloc((p - *arg) - reduce); 3587 if (str == NULL) 3588 return FAIL; 3589 rettv->v_type = VAR_STRING; 3590 rettv->vval.v_string = str; 3591 3592 for (p = *arg + 1; *p != NUL; ) 3593 { 3594 if (*p == '\'') 3595 { 3596 if (p[1] != '\'') 3597 break; 3598 ++p; 3599 } 3600 MB_COPY_CHAR(p, str); 3601 } 3602 *str = NUL; 3603 *arg = p + 1; 3604 3605 return OK; 3606 } 3607 3608 /* 3609 * Return the function name of the partial. 3610 */ 3611 char_u * 3612 partial_name(partial_T *pt) 3613 { 3614 if (pt->pt_name != NULL) 3615 return pt->pt_name; 3616 return pt->pt_func->uf_name; 3617 } 3618 3619 static void 3620 partial_free(partial_T *pt) 3621 { 3622 int i; 3623 3624 for (i = 0; i < pt->pt_argc; ++i) 3625 clear_tv(&pt->pt_argv[i]); 3626 vim_free(pt->pt_argv); 3627 dict_unref(pt->pt_dict); 3628 if (pt->pt_name != NULL) 3629 { 3630 func_unref(pt->pt_name); 3631 vim_free(pt->pt_name); 3632 } 3633 else 3634 func_ptr_unref(pt->pt_func); 3635 vim_free(pt); 3636 } 3637 3638 /* 3639 * Unreference a closure: decrement the reference count and free it when it 3640 * becomes zero. 3641 */ 3642 void 3643 partial_unref(partial_T *pt) 3644 { 3645 if (pt != NULL && --pt->pt_refcount <= 0) 3646 partial_free(pt); 3647 } 3648 3649 static int tv_equal_recurse_limit; 3650 3651 static int 3652 func_equal( 3653 typval_T *tv1, 3654 typval_T *tv2, 3655 int ic) /* ignore case */ 3656 { 3657 char_u *s1, *s2; 3658 dict_T *d1, *d2; 3659 int a1, a2; 3660 int i; 3661 3662 /* empty and NULL function name considered the same */ 3663 s1 = tv1->v_type == VAR_FUNC ? tv1->vval.v_string 3664 : partial_name(tv1->vval.v_partial); 3665 if (s1 != NULL && *s1 == NUL) 3666 s1 = NULL; 3667 s2 = tv2->v_type == VAR_FUNC ? tv2->vval.v_string 3668 : partial_name(tv2->vval.v_partial); 3669 if (s2 != NULL && *s2 == NUL) 3670 s2 = NULL; 3671 if (s1 == NULL || s2 == NULL) 3672 { 3673 if (s1 != s2) 3674 return FALSE; 3675 } 3676 else if (STRCMP(s1, s2) != 0) 3677 return FALSE; 3678 3679 /* empty dict and NULL dict is different */ 3680 d1 = tv1->v_type == VAR_FUNC ? NULL : tv1->vval.v_partial->pt_dict; 3681 d2 = tv2->v_type == VAR_FUNC ? NULL : tv2->vval.v_partial->pt_dict; 3682 if (d1 == NULL || d2 == NULL) 3683 { 3684 if (d1 != d2) 3685 return FALSE; 3686 } 3687 else if (!dict_equal(d1, d2, ic, TRUE)) 3688 return FALSE; 3689 3690 /* empty list and no list considered the same */ 3691 a1 = tv1->v_type == VAR_FUNC ? 0 : tv1->vval.v_partial->pt_argc; 3692 a2 = tv2->v_type == VAR_FUNC ? 0 : tv2->vval.v_partial->pt_argc; 3693 if (a1 != a2) 3694 return FALSE; 3695 for (i = 0; i < a1; ++i) 3696 if (!tv_equal(tv1->vval.v_partial->pt_argv + i, 3697 tv2->vval.v_partial->pt_argv + i, ic, TRUE)) 3698 return FALSE; 3699 3700 return TRUE; 3701 } 3702 3703 /* 3704 * Return TRUE if "tv1" and "tv2" have the same value. 3705 * Compares the items just like "==" would compare them, but strings and 3706 * numbers are different. Floats and numbers are also different. 3707 */ 3708 int 3709 tv_equal( 3710 typval_T *tv1, 3711 typval_T *tv2, 3712 int ic, /* ignore case */ 3713 int recursive) /* TRUE when used recursively */ 3714 { 3715 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 3716 char_u *s1, *s2; 3717 static int recursive_cnt = 0; /* catch recursive loops */ 3718 int r; 3719 3720 /* Catch lists and dicts that have an endless loop by limiting 3721 * recursiveness to a limit. We guess they are equal then. 3722 * A fixed limit has the problem of still taking an awful long time. 3723 * Reduce the limit every time running into it. That should work fine for 3724 * deeply linked structures that are not recursively linked and catch 3725 * recursiveness quickly. */ 3726 if (!recursive) 3727 tv_equal_recurse_limit = 1000; 3728 if (recursive_cnt >= tv_equal_recurse_limit) 3729 { 3730 --tv_equal_recurse_limit; 3731 return TRUE; 3732 } 3733 3734 /* For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and 3735 * arguments. */ 3736 if ((tv1->v_type == VAR_FUNC 3737 || (tv1->v_type == VAR_PARTIAL && tv1->vval.v_partial != NULL)) 3738 && (tv2->v_type == VAR_FUNC 3739 || (tv2->v_type == VAR_PARTIAL && tv2->vval.v_partial != NULL))) 3740 { 3741 ++recursive_cnt; 3742 r = func_equal(tv1, tv2, ic); 3743 --recursive_cnt; 3744 return r; 3745 } 3746 3747 if (tv1->v_type != tv2->v_type) 3748 return FALSE; 3749 3750 switch (tv1->v_type) 3751 { 3752 case VAR_LIST: 3753 ++recursive_cnt; 3754 r = list_equal(tv1->vval.v_list, tv2->vval.v_list, ic, TRUE); 3755 --recursive_cnt; 3756 return r; 3757 3758 case VAR_DICT: 3759 ++recursive_cnt; 3760 r = dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic, TRUE); 3761 --recursive_cnt; 3762 return r; 3763 3764 case VAR_BLOB: 3765 return blob_equal(tv1->vval.v_blob, tv2->vval.v_blob); 3766 3767 case VAR_NUMBER: 3768 return tv1->vval.v_number == tv2->vval.v_number; 3769 3770 case VAR_STRING: 3771 s1 = tv_get_string_buf(tv1, buf1); 3772 s2 = tv_get_string_buf(tv2, buf2); 3773 return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0); 3774 3775 case VAR_SPECIAL: 3776 return tv1->vval.v_number == tv2->vval.v_number; 3777 3778 case VAR_FLOAT: 3779 #ifdef FEAT_FLOAT 3780 return tv1->vval.v_float == tv2->vval.v_float; 3781 #endif 3782 case VAR_JOB: 3783 #ifdef FEAT_JOB_CHANNEL 3784 return tv1->vval.v_job == tv2->vval.v_job; 3785 #endif 3786 case VAR_CHANNEL: 3787 #ifdef FEAT_JOB_CHANNEL 3788 return tv1->vval.v_channel == tv2->vval.v_channel; 3789 #endif 3790 case VAR_FUNC: 3791 case VAR_PARTIAL: 3792 case VAR_UNKNOWN: 3793 break; 3794 } 3795 3796 /* VAR_UNKNOWN can be the result of a invalid expression, let's say it 3797 * does not equal anything, not even itself. */ 3798 return FALSE; 3799 } 3800 3801 /* 3802 * Return the next (unique) copy ID. 3803 * Used for serializing nested structures. 3804 */ 3805 int 3806 get_copyID(void) 3807 { 3808 current_copyID += COPYID_INC; 3809 return current_copyID; 3810 } 3811 3812 /* 3813 * Garbage collection for lists and dictionaries. 3814 * 3815 * We use reference counts to be able to free most items right away when they 3816 * are no longer used. But for composite items it's possible that it becomes 3817 * unused while the reference count is > 0: When there is a recursive 3818 * reference. Example: 3819 * :let l = [1, 2, 3] 3820 * :let d = {9: l} 3821 * :let l[1] = d 3822 * 3823 * Since this is quite unusual we handle this with garbage collection: every 3824 * once in a while find out which lists and dicts are not referenced from any 3825 * variable. 3826 * 3827 * Here is a good reference text about garbage collection (refers to Python 3828 * but it applies to all reference-counting mechanisms): 3829 * http://python.ca/nas/python/gc/ 3830 */ 3831 3832 /* 3833 * Do garbage collection for lists and dicts. 3834 * When "testing" is TRUE this is called from test_garbagecollect_now(). 3835 * Return TRUE if some memory was freed. 3836 */ 3837 int 3838 garbage_collect(int testing) 3839 { 3840 int copyID; 3841 int abort = FALSE; 3842 buf_T *buf; 3843 win_T *wp; 3844 int did_free = FALSE; 3845 tabpage_T *tp; 3846 3847 if (!testing) 3848 { 3849 /* Only do this once. */ 3850 want_garbage_collect = FALSE; 3851 may_garbage_collect = FALSE; 3852 garbage_collect_at_exit = FALSE; 3853 } 3854 3855 /* We advance by two because we add one for items referenced through 3856 * previous_funccal. */ 3857 copyID = get_copyID(); 3858 3859 /* 3860 * 1. Go through all accessible variables and mark all lists and dicts 3861 * with copyID. 3862 */ 3863 3864 /* Don't free variables in the previous_funccal list unless they are only 3865 * referenced through previous_funccal. This must be first, because if 3866 * the item is referenced elsewhere the funccal must not be freed. */ 3867 abort = abort || set_ref_in_previous_funccal(copyID); 3868 3869 /* script-local variables */ 3870 abort = abort || garbage_collect_scriptvars(copyID); 3871 3872 /* buffer-local variables */ 3873 FOR_ALL_BUFFERS(buf) 3874 abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID, 3875 NULL, NULL); 3876 3877 /* window-local variables */ 3878 FOR_ALL_TAB_WINDOWS(tp, wp) 3879 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3880 NULL, NULL); 3881 if (aucmd_win != NULL) 3882 abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID, 3883 NULL, NULL); 3884 #ifdef FEAT_TEXT_PROP 3885 for (wp = first_popupwin; wp != NULL; wp = wp->w_next) 3886 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3887 NULL, NULL); 3888 FOR_ALL_TABPAGES(tp) 3889 for (wp = tp->tp_first_popupwin; wp != NULL; wp = wp->w_next) 3890 abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID, 3891 NULL, NULL); 3892 #endif 3893 3894 /* tabpage-local variables */ 3895 FOR_ALL_TABPAGES(tp) 3896 abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID, 3897 NULL, NULL); 3898 /* global variables */ 3899 abort = abort || garbage_collect_globvars(copyID); 3900 3901 /* function-local variables */ 3902 abort = abort || set_ref_in_call_stack(copyID); 3903 3904 /* named functions (matters for closures) */ 3905 abort = abort || set_ref_in_functions(copyID); 3906 3907 /* function call arguments, if v:testing is set. */ 3908 abort = abort || set_ref_in_func_args(copyID); 3909 3910 /* v: vars */ 3911 abort = abort || garbage_collect_vimvars(copyID); 3912 3913 // callbacks in buffers 3914 abort = abort || set_ref_in_buffers(copyID); 3915 3916 #ifdef FEAT_LUA 3917 abort = abort || set_ref_in_lua(copyID); 3918 #endif 3919 3920 #ifdef FEAT_PYTHON 3921 abort = abort || set_ref_in_python(copyID); 3922 #endif 3923 3924 #ifdef FEAT_PYTHON3 3925 abort = abort || set_ref_in_python3(copyID); 3926 #endif 3927 3928 #ifdef FEAT_JOB_CHANNEL 3929 abort = abort || set_ref_in_channel(copyID); 3930 abort = abort || set_ref_in_job(copyID); 3931 #endif 3932 #ifdef FEAT_NETBEANS_INTG 3933 abort = abort || set_ref_in_nb_channel(copyID); 3934 #endif 3935 3936 #ifdef FEAT_TIMERS 3937 abort = abort || set_ref_in_timer(copyID); 3938 #endif 3939 3940 #ifdef FEAT_QUICKFIX 3941 abort = abort || set_ref_in_quickfix(copyID); 3942 #endif 3943 3944 #ifdef FEAT_TERMINAL 3945 abort = abort || set_ref_in_term(copyID); 3946 #endif 3947 3948 #ifdef FEAT_TEXT_PROP 3949 abort = abort || set_ref_in_popups(copyID); 3950 #endif 3951 3952 if (!abort) 3953 { 3954 /* 3955 * 2. Free lists and dictionaries that are not referenced. 3956 */ 3957 did_free = free_unref_items(copyID); 3958 3959 /* 3960 * 3. Check if any funccal can be freed now. 3961 * This may call us back recursively. 3962 */ 3963 free_unref_funccal(copyID, testing); 3964 } 3965 else if (p_verbose > 0) 3966 { 3967 verb_msg(_("Not enough memory to set references, garbage collection aborted!")); 3968 } 3969 3970 return did_free; 3971 } 3972 3973 /* 3974 * Free lists, dictionaries, channels and jobs that are no longer referenced. 3975 */ 3976 static int 3977 free_unref_items(int copyID) 3978 { 3979 int did_free = FALSE; 3980 3981 /* Let all "free" functions know that we are here. This means no 3982 * dictionaries, lists, channels or jobs are to be freed, because we will 3983 * do that here. */ 3984 in_free_unref_items = TRUE; 3985 3986 /* 3987 * PASS 1: free the contents of the items. We don't free the items 3988 * themselves yet, so that it is possible to decrement refcount counters 3989 */ 3990 3991 /* Go through the list of dicts and free items without the copyID. */ 3992 did_free |= dict_free_nonref(copyID); 3993 3994 /* Go through the list of lists and free items without the copyID. */ 3995 did_free |= list_free_nonref(copyID); 3996 3997 #ifdef FEAT_JOB_CHANNEL 3998 /* Go through the list of jobs and free items without the copyID. This 3999 * must happen before doing channels, because jobs refer to channels, but 4000 * the reference from the channel to the job isn't tracked. */ 4001 did_free |= free_unused_jobs_contents(copyID, COPYID_MASK); 4002 4003 /* Go through the list of channels and free items without the copyID. */ 4004 did_free |= free_unused_channels_contents(copyID, COPYID_MASK); 4005 #endif 4006 4007 /* 4008 * PASS 2: free the items themselves. 4009 */ 4010 dict_free_items(copyID); 4011 list_free_items(copyID); 4012 4013 #ifdef FEAT_JOB_CHANNEL 4014 /* Go through the list of jobs and free items without the copyID. This 4015 * must happen before doing channels, because jobs refer to channels, but 4016 * the reference from the channel to the job isn't tracked. */ 4017 free_unused_jobs(copyID, COPYID_MASK); 4018 4019 /* Go through the list of channels and free items without the copyID. */ 4020 free_unused_channels(copyID, COPYID_MASK); 4021 #endif 4022 4023 in_free_unref_items = FALSE; 4024 4025 return did_free; 4026 } 4027 4028 /* 4029 * Mark all lists and dicts referenced through hashtab "ht" with "copyID". 4030 * "list_stack" is used to add lists to be marked. Can be NULL. 4031 * 4032 * Returns TRUE if setting references failed somehow. 4033 */ 4034 int 4035 set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack) 4036 { 4037 int todo; 4038 int abort = FALSE; 4039 hashitem_T *hi; 4040 hashtab_T *cur_ht; 4041 ht_stack_T *ht_stack = NULL; 4042 ht_stack_T *tempitem; 4043 4044 cur_ht = ht; 4045 for (;;) 4046 { 4047 if (!abort) 4048 { 4049 /* Mark each item in the hashtab. If the item contains a hashtab 4050 * it is added to ht_stack, if it contains a list it is added to 4051 * list_stack. */ 4052 todo = (int)cur_ht->ht_used; 4053 for (hi = cur_ht->ht_array; todo > 0; ++hi) 4054 if (!HASHITEM_EMPTY(hi)) 4055 { 4056 --todo; 4057 abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID, 4058 &ht_stack, list_stack); 4059 } 4060 } 4061 4062 if (ht_stack == NULL) 4063 break; 4064 4065 /* take an item from the stack */ 4066 cur_ht = ht_stack->ht; 4067 tempitem = ht_stack; 4068 ht_stack = ht_stack->prev; 4069 free(tempitem); 4070 } 4071 4072 return abort; 4073 } 4074 4075 /* 4076 * Mark a dict and its items with "copyID". 4077 * Returns TRUE if setting references failed somehow. 4078 */ 4079 int 4080 set_ref_in_dict(dict_T *d, int copyID) 4081 { 4082 if (d != NULL && d->dv_copyID != copyID) 4083 { 4084 d->dv_copyID = copyID; 4085 return set_ref_in_ht(&d->dv_hashtab, copyID, NULL); 4086 } 4087 return FALSE; 4088 } 4089 4090 /* 4091 * Mark a list and its items with "copyID". 4092 * Returns TRUE if setting references failed somehow. 4093 */ 4094 int 4095 set_ref_in_list(list_T *ll, int copyID) 4096 { 4097 if (ll != NULL && ll->lv_copyID != copyID) 4098 { 4099 ll->lv_copyID = copyID; 4100 return set_ref_in_list_items(ll, copyID, NULL); 4101 } 4102 return FALSE; 4103 } 4104 4105 /* 4106 * Mark all lists and dicts referenced through list "l" with "copyID". 4107 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4108 * 4109 * Returns TRUE if setting references failed somehow. 4110 */ 4111 int 4112 set_ref_in_list_items(list_T *l, int copyID, ht_stack_T **ht_stack) 4113 { 4114 listitem_T *li; 4115 int abort = FALSE; 4116 list_T *cur_l; 4117 list_stack_T *list_stack = NULL; 4118 list_stack_T *tempitem; 4119 4120 cur_l = l; 4121 for (;;) 4122 { 4123 if (!abort) 4124 /* Mark each item in the list. If the item contains a hashtab 4125 * it is added to ht_stack, if it contains a list it is added to 4126 * list_stack. */ 4127 for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next) 4128 abort = abort || set_ref_in_item(&li->li_tv, copyID, 4129 ht_stack, &list_stack); 4130 if (list_stack == NULL) 4131 break; 4132 4133 /* take an item from the stack */ 4134 cur_l = list_stack->list; 4135 tempitem = list_stack; 4136 list_stack = list_stack->prev; 4137 free(tempitem); 4138 } 4139 4140 return abort; 4141 } 4142 4143 /* 4144 * Mark all lists and dicts referenced through typval "tv" with "copyID". 4145 * "list_stack" is used to add lists to be marked. Can be NULL. 4146 * "ht_stack" is used to add hashtabs to be marked. Can be NULL. 4147 * 4148 * Returns TRUE if setting references failed somehow. 4149 */ 4150 int 4151 set_ref_in_item( 4152 typval_T *tv, 4153 int copyID, 4154 ht_stack_T **ht_stack, 4155 list_stack_T **list_stack) 4156 { 4157 int abort = FALSE; 4158 4159 if (tv->v_type == VAR_DICT) 4160 { 4161 dict_T *dd = tv->vval.v_dict; 4162 4163 if (dd != NULL && dd->dv_copyID != copyID) 4164 { 4165 /* Didn't see this dict yet. */ 4166 dd->dv_copyID = copyID; 4167 if (ht_stack == NULL) 4168 { 4169 abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack); 4170 } 4171 else 4172 { 4173 ht_stack_T *newitem = (ht_stack_T*)malloc(sizeof(ht_stack_T)); 4174 if (newitem == NULL) 4175 abort = TRUE; 4176 else 4177 { 4178 newitem->ht = &dd->dv_hashtab; 4179 newitem->prev = *ht_stack; 4180 *ht_stack = newitem; 4181 } 4182 } 4183 } 4184 } 4185 else if (tv->v_type == VAR_LIST) 4186 { 4187 list_T *ll = tv->vval.v_list; 4188 4189 if (ll != NULL && ll->lv_copyID != copyID) 4190 { 4191 /* Didn't see this list yet. */ 4192 ll->lv_copyID = copyID; 4193 if (list_stack == NULL) 4194 { 4195 abort = set_ref_in_list_items(ll, copyID, ht_stack); 4196 } 4197 else 4198 { 4199 list_stack_T *newitem = (list_stack_T*)malloc( 4200 sizeof(list_stack_T)); 4201 if (newitem == NULL) 4202 abort = TRUE; 4203 else 4204 { 4205 newitem->list = ll; 4206 newitem->prev = *list_stack; 4207 *list_stack = newitem; 4208 } 4209 } 4210 } 4211 } 4212 else if (tv->v_type == VAR_FUNC) 4213 { 4214 abort = set_ref_in_func(tv->vval.v_string, NULL, copyID); 4215 } 4216 else if (tv->v_type == VAR_PARTIAL) 4217 { 4218 partial_T *pt = tv->vval.v_partial; 4219 int i; 4220 4221 /* A partial does not have a copyID, because it cannot contain itself. 4222 */ 4223 if (pt != NULL) 4224 { 4225 abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID); 4226 4227 if (pt->pt_dict != NULL) 4228 { 4229 typval_T dtv; 4230 4231 dtv.v_type = VAR_DICT; 4232 dtv.vval.v_dict = pt->pt_dict; 4233 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4234 } 4235 4236 for (i = 0; i < pt->pt_argc; ++i) 4237 abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID, 4238 ht_stack, list_stack); 4239 } 4240 } 4241 #ifdef FEAT_JOB_CHANNEL 4242 else if (tv->v_type == VAR_JOB) 4243 { 4244 job_T *job = tv->vval.v_job; 4245 typval_T dtv; 4246 4247 if (job != NULL && job->jv_copyID != copyID) 4248 { 4249 job->jv_copyID = copyID; 4250 if (job->jv_channel != NULL) 4251 { 4252 dtv.v_type = VAR_CHANNEL; 4253 dtv.vval.v_channel = job->jv_channel; 4254 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4255 } 4256 if (job->jv_exit_cb.cb_partial != NULL) 4257 { 4258 dtv.v_type = VAR_PARTIAL; 4259 dtv.vval.v_partial = job->jv_exit_cb.cb_partial; 4260 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4261 } 4262 } 4263 } 4264 else if (tv->v_type == VAR_CHANNEL) 4265 { 4266 channel_T *ch =tv->vval.v_channel; 4267 ch_part_T part; 4268 typval_T dtv; 4269 jsonq_T *jq; 4270 cbq_T *cq; 4271 4272 if (ch != NULL && ch->ch_copyID != copyID) 4273 { 4274 ch->ch_copyID = copyID; 4275 for (part = PART_SOCK; part < PART_COUNT; ++part) 4276 { 4277 for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL; 4278 jq = jq->jq_next) 4279 set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack); 4280 for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL; 4281 cq = cq->cq_next) 4282 if (cq->cq_callback.cb_partial != NULL) 4283 { 4284 dtv.v_type = VAR_PARTIAL; 4285 dtv.vval.v_partial = cq->cq_callback.cb_partial; 4286 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4287 } 4288 if (ch->ch_part[part].ch_callback.cb_partial != NULL) 4289 { 4290 dtv.v_type = VAR_PARTIAL; 4291 dtv.vval.v_partial = 4292 ch->ch_part[part].ch_callback.cb_partial; 4293 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4294 } 4295 } 4296 if (ch->ch_callback.cb_partial != NULL) 4297 { 4298 dtv.v_type = VAR_PARTIAL; 4299 dtv.vval.v_partial = ch->ch_callback.cb_partial; 4300 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4301 } 4302 if (ch->ch_close_cb.cb_partial != NULL) 4303 { 4304 dtv.v_type = VAR_PARTIAL; 4305 dtv.vval.v_partial = ch->ch_close_cb.cb_partial; 4306 set_ref_in_item(&dtv, copyID, ht_stack, list_stack); 4307 } 4308 } 4309 } 4310 #endif 4311 return abort; 4312 } 4313 4314 /* 4315 * Return a string with the string representation of a variable. 4316 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4317 * "numbuf" is used for a number. 4318 * When "copyID" is not NULL replace recursive lists and dicts with "...". 4319 * When both "echo_style" and "composite_val" are FALSE, put quotes around 4320 * stings as "string()", otherwise does not put quotes around strings, as 4321 * ":echo" displays values. 4322 * When "restore_copyID" is FALSE, repeated items in dictionaries and lists 4323 * are replaced with "...". 4324 * May return NULL. 4325 */ 4326 char_u * 4327 echo_string_core( 4328 typval_T *tv, 4329 char_u **tofree, 4330 char_u *numbuf, 4331 int copyID, 4332 int echo_style, 4333 int restore_copyID, 4334 int composite_val) 4335 { 4336 static int recurse = 0; 4337 char_u *r = NULL; 4338 4339 if (recurse >= DICT_MAXNEST) 4340 { 4341 if (!did_echo_string_emsg) 4342 { 4343 /* Only give this message once for a recursive call to avoid 4344 * flooding the user with errors. And stop iterating over lists 4345 * and dicts. */ 4346 did_echo_string_emsg = TRUE; 4347 emsg(_("E724: variable nested too deep for displaying")); 4348 } 4349 *tofree = NULL; 4350 return (char_u *)"{E724}"; 4351 } 4352 ++recurse; 4353 4354 switch (tv->v_type) 4355 { 4356 case VAR_STRING: 4357 if (echo_style && !composite_val) 4358 { 4359 *tofree = NULL; 4360 r = tv->vval.v_string; 4361 if (r == NULL) 4362 r = (char_u *)""; 4363 } 4364 else 4365 { 4366 *tofree = string_quote(tv->vval.v_string, FALSE); 4367 r = *tofree; 4368 } 4369 break; 4370 4371 case VAR_FUNC: 4372 if (echo_style) 4373 { 4374 *tofree = NULL; 4375 r = tv->vval.v_string; 4376 } 4377 else 4378 { 4379 *tofree = string_quote(tv->vval.v_string, TRUE); 4380 r = *tofree; 4381 } 4382 break; 4383 4384 case VAR_PARTIAL: 4385 { 4386 partial_T *pt = tv->vval.v_partial; 4387 char_u *fname = string_quote(pt == NULL ? NULL 4388 : partial_name(pt), FALSE); 4389 garray_T ga; 4390 int i; 4391 char_u *tf; 4392 4393 ga_init2(&ga, 1, 100); 4394 ga_concat(&ga, (char_u *)"function("); 4395 if (fname != NULL) 4396 { 4397 ga_concat(&ga, fname); 4398 vim_free(fname); 4399 } 4400 if (pt != NULL && pt->pt_argc > 0) 4401 { 4402 ga_concat(&ga, (char_u *)", ["); 4403 for (i = 0; i < pt->pt_argc; ++i) 4404 { 4405 if (i > 0) 4406 ga_concat(&ga, (char_u *)", "); 4407 ga_concat(&ga, 4408 tv2string(&pt->pt_argv[i], &tf, numbuf, copyID)); 4409 vim_free(tf); 4410 } 4411 ga_concat(&ga, (char_u *)"]"); 4412 } 4413 if (pt != NULL && pt->pt_dict != NULL) 4414 { 4415 typval_T dtv; 4416 4417 ga_concat(&ga, (char_u *)", "); 4418 dtv.v_type = VAR_DICT; 4419 dtv.vval.v_dict = pt->pt_dict; 4420 ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID)); 4421 vim_free(tf); 4422 } 4423 ga_concat(&ga, (char_u *)")"); 4424 4425 *tofree = ga.ga_data; 4426 r = *tofree; 4427 break; 4428 } 4429 4430 case VAR_BLOB: 4431 r = blob2string(tv->vval.v_blob, tofree, numbuf); 4432 break; 4433 4434 case VAR_LIST: 4435 if (tv->vval.v_list == NULL) 4436 { 4437 *tofree = NULL; 4438 r = NULL; 4439 } 4440 else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID 4441 && tv->vval.v_list->lv_len > 0) 4442 { 4443 *tofree = NULL; 4444 r = (char_u *)"[...]"; 4445 } 4446 else 4447 { 4448 int old_copyID = tv->vval.v_list->lv_copyID; 4449 4450 tv->vval.v_list->lv_copyID = copyID; 4451 *tofree = list2string(tv, copyID, restore_copyID); 4452 if (restore_copyID) 4453 tv->vval.v_list->lv_copyID = old_copyID; 4454 r = *tofree; 4455 } 4456 break; 4457 4458 case VAR_DICT: 4459 if (tv->vval.v_dict == NULL) 4460 { 4461 *tofree = NULL; 4462 r = NULL; 4463 } 4464 else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID 4465 && tv->vval.v_dict->dv_hashtab.ht_used != 0) 4466 { 4467 *tofree = NULL; 4468 r = (char_u *)"{...}"; 4469 } 4470 else 4471 { 4472 int old_copyID = tv->vval.v_dict->dv_copyID; 4473 tv->vval.v_dict->dv_copyID = copyID; 4474 *tofree = dict2string(tv, copyID, restore_copyID); 4475 if (restore_copyID) 4476 tv->vval.v_dict->dv_copyID = old_copyID; 4477 r = *tofree; 4478 } 4479 break; 4480 4481 case VAR_NUMBER: 4482 case VAR_UNKNOWN: 4483 *tofree = NULL; 4484 r = tv_get_string_buf(tv, numbuf); 4485 break; 4486 4487 case VAR_JOB: 4488 case VAR_CHANNEL: 4489 *tofree = NULL; 4490 r = tv_get_string_buf(tv, numbuf); 4491 if (composite_val) 4492 { 4493 *tofree = string_quote(r, FALSE); 4494 r = *tofree; 4495 } 4496 break; 4497 4498 case VAR_FLOAT: 4499 #ifdef FEAT_FLOAT 4500 *tofree = NULL; 4501 vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float); 4502 r = numbuf; 4503 break; 4504 #endif 4505 4506 case VAR_SPECIAL: 4507 *tofree = NULL; 4508 r = (char_u *)get_var_special_name(tv->vval.v_number); 4509 break; 4510 } 4511 4512 if (--recurse == 0) 4513 did_echo_string_emsg = FALSE; 4514 return r; 4515 } 4516 4517 /* 4518 * Return a string with the string representation of a variable. 4519 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4520 * "numbuf" is used for a number. 4521 * Does not put quotes around strings, as ":echo" displays values. 4522 * When "copyID" is not NULL replace recursive lists and dicts with "...". 4523 * May return NULL. 4524 */ 4525 char_u * 4526 echo_string( 4527 typval_T *tv, 4528 char_u **tofree, 4529 char_u *numbuf, 4530 int copyID) 4531 { 4532 return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE); 4533 } 4534 4535 /* 4536 * Return a string with the string representation of a variable. 4537 * If the memory is allocated "tofree" is set to it, otherwise NULL. 4538 * "numbuf" is used for a number. 4539 * Puts quotes around strings, so that they can be parsed back by eval(). 4540 * May return NULL. 4541 */ 4542 char_u * 4543 tv2string( 4544 typval_T *tv, 4545 char_u **tofree, 4546 char_u *numbuf, 4547 int copyID) 4548 { 4549 return echo_string_core(tv, tofree, numbuf, copyID, FALSE, TRUE, FALSE); 4550 } 4551 4552 /* 4553 * Return string "str" in ' quotes, doubling ' characters. 4554 * If "str" is NULL an empty string is assumed. 4555 * If "function" is TRUE make it function('string'). 4556 */ 4557 char_u * 4558 string_quote(char_u *str, int function) 4559 { 4560 unsigned len; 4561 char_u *p, *r, *s; 4562 4563 len = (function ? 13 : 3); 4564 if (str != NULL) 4565 { 4566 len += (unsigned)STRLEN(str); 4567 for (p = str; *p != NUL; MB_PTR_ADV(p)) 4568 if (*p == '\'') 4569 ++len; 4570 } 4571 s = r = alloc(len); 4572 if (r != NULL) 4573 { 4574 if (function) 4575 { 4576 STRCPY(r, "function('"); 4577 r += 10; 4578 } 4579 else 4580 *r++ = '\''; 4581 if (str != NULL) 4582 for (p = str; *p != NUL; ) 4583 { 4584 if (*p == '\'') 4585 *r++ = '\''; 4586 MB_COPY_CHAR(p, r); 4587 } 4588 *r++ = '\''; 4589 if (function) 4590 *r++ = ')'; 4591 *r++ = NUL; 4592 } 4593 return s; 4594 } 4595 4596 #if defined(FEAT_FLOAT) || defined(PROTO) 4597 /* 4598 * Convert the string "text" to a floating point number. 4599 * This uses strtod(). setlocale(LC_NUMERIC, "C") has been used to make sure 4600 * this always uses a decimal point. 4601 * Returns the length of the text that was consumed. 4602 */ 4603 int 4604 string2float( 4605 char_u *text, 4606 float_T *value) /* result stored here */ 4607 { 4608 char *s = (char *)text; 4609 float_T f; 4610 4611 /* MS-Windows does not deal with "inf" and "nan" properly. */ 4612 if (STRNICMP(text, "inf", 3) == 0) 4613 { 4614 *value = INFINITY; 4615 return 3; 4616 } 4617 if (STRNICMP(text, "-inf", 3) == 0) 4618 { 4619 *value = -INFINITY; 4620 return 4; 4621 } 4622 if (STRNICMP(text, "nan", 3) == 0) 4623 { 4624 *value = NAN; 4625 return 3; 4626 } 4627 f = strtod(s, &s); 4628 *value = f; 4629 return (int)((char_u *)s - text); 4630 } 4631 #endif 4632 4633 /* 4634 * Get the value of an environment variable. 4635 * "arg" is pointing to the '$'. It is advanced to after the name. 4636 * If the environment variable was not set, silently assume it is empty. 4637 * Return FAIL if the name is invalid. 4638 */ 4639 static int 4640 get_env_tv(char_u **arg, typval_T *rettv, int evaluate) 4641 { 4642 char_u *string = NULL; 4643 int len; 4644 int cc; 4645 char_u *name; 4646 int mustfree = FALSE; 4647 4648 ++*arg; 4649 name = *arg; 4650 len = get_env_len(arg); 4651 if (evaluate) 4652 { 4653 if (len == 0) 4654 return FAIL; /* invalid empty name */ 4655 4656 cc = name[len]; 4657 name[len] = NUL; 4658 /* first try vim_getenv(), fast for normal environment vars */ 4659 string = vim_getenv(name, &mustfree); 4660 if (string != NULL && *string != NUL) 4661 { 4662 if (!mustfree) 4663 string = vim_strsave(string); 4664 } 4665 else 4666 { 4667 if (mustfree) 4668 vim_free(string); 4669 4670 /* next try expanding things like $VIM and ${HOME} */ 4671 string = expand_env_save(name - 1); 4672 if (string != NULL && *string == '$') 4673 VIM_CLEAR(string); 4674 } 4675 name[len] = cc; 4676 4677 rettv->v_type = VAR_STRING; 4678 rettv->vval.v_string = string; 4679 } 4680 4681 return OK; 4682 } 4683 4684 /* 4685 * Translate a String variable into a position. 4686 * Returns NULL when there is an error. 4687 */ 4688 pos_T * 4689 var2fpos( 4690 typval_T *varp, 4691 int dollar_lnum, /* TRUE when $ is last line */ 4692 int *fnum) /* set to fnum for '0, 'A, etc. */ 4693 { 4694 char_u *name; 4695 static pos_T pos; 4696 pos_T *pp; 4697 4698 /* Argument can be [lnum, col, coladd]. */ 4699 if (varp->v_type == VAR_LIST) 4700 { 4701 list_T *l; 4702 int len; 4703 int error = FALSE; 4704 listitem_T *li; 4705 4706 l = varp->vval.v_list; 4707 if (l == NULL) 4708 return NULL; 4709 4710 /* Get the line number */ 4711 pos.lnum = list_find_nr(l, 0L, &error); 4712 if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count) 4713 return NULL; /* invalid line number */ 4714 4715 /* Get the column number */ 4716 pos.col = list_find_nr(l, 1L, &error); 4717 if (error) 4718 return NULL; 4719 len = (long)STRLEN(ml_get(pos.lnum)); 4720 4721 /* We accept "$" for the column number: last column. */ 4722 li = list_find(l, 1L); 4723 if (li != NULL && li->li_tv.v_type == VAR_STRING 4724 && li->li_tv.vval.v_string != NULL 4725 && STRCMP(li->li_tv.vval.v_string, "$") == 0) 4726 pos.col = len + 1; 4727 4728 /* Accept a position up to the NUL after the line. */ 4729 if (pos.col == 0 || (int)pos.col > len + 1) 4730 return NULL; /* invalid column number */ 4731 --pos.col; 4732 4733 /* Get the virtual offset. Defaults to zero. */ 4734 pos.coladd = list_find_nr(l, 2L, &error); 4735 if (error) 4736 pos.coladd = 0; 4737 4738 return &pos; 4739 } 4740 4741 name = tv_get_string_chk(varp); 4742 if (name == NULL) 4743 return NULL; 4744 if (name[0] == '.') /* cursor */ 4745 return &curwin->w_cursor; 4746 if (name[0] == 'v' && name[1] == NUL) /* Visual start */ 4747 { 4748 if (VIsual_active) 4749 return &VIsual; 4750 return &curwin->w_cursor; 4751 } 4752 if (name[0] == '\'') /* mark */ 4753 { 4754 pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum); 4755 if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0) 4756 return NULL; 4757 return pp; 4758 } 4759 4760 pos.coladd = 0; 4761 4762 if (name[0] == 'w' && dollar_lnum) 4763 { 4764 pos.col = 0; 4765 if (name[1] == '0') /* "w0": first visible line */ 4766 { 4767 update_topline(); 4768 /* In silent Ex mode topline is zero, but that's not a valid line 4769 * number; use one instead. */ 4770 pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1; 4771 return &pos; 4772 } 4773 else if (name[1] == '$') /* "w$": last visible line */ 4774 { 4775 validate_botline(); 4776 /* In silent Ex mode botline is zero, return zero then. */ 4777 pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0; 4778 return &pos; 4779 } 4780 } 4781 else if (name[0] == '$') /* last column or line */ 4782 { 4783 if (dollar_lnum) 4784 { 4785 pos.lnum = curbuf->b_ml.ml_line_count; 4786 pos.col = 0; 4787 } 4788 else 4789 { 4790 pos.lnum = curwin->w_cursor.lnum; 4791 pos.col = (colnr_T)STRLEN(ml_get_curline()); 4792 } 4793 return &pos; 4794 } 4795 return NULL; 4796 } 4797 4798 /* 4799 * Convert list in "arg" into a position and optional file number. 4800 * When "fnump" is NULL there is no file number, only 3 items. 4801 * Note that the column is passed on as-is, the caller may want to decrement 4802 * it to use 1 for the first column. 4803 * Return FAIL when conversion is not possible, doesn't check the position for 4804 * validity. 4805 */ 4806 int 4807 list2fpos( 4808 typval_T *arg, 4809 pos_T *posp, 4810 int *fnump, 4811 colnr_T *curswantp) 4812 { 4813 list_T *l = arg->vval.v_list; 4814 long i = 0; 4815 long n; 4816 4817 /* List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only 4818 * there when "fnump" isn't NULL; "coladd" and "curswant" are optional. */ 4819 if (arg->v_type != VAR_LIST 4820 || l == NULL 4821 || l->lv_len < (fnump == NULL ? 2 : 3) 4822 || l->lv_len > (fnump == NULL ? 4 : 5)) 4823 return FAIL; 4824 4825 if (fnump != NULL) 4826 { 4827 n = list_find_nr(l, i++, NULL); /* fnum */ 4828 if (n < 0) 4829 return FAIL; 4830 if (n == 0) 4831 n = curbuf->b_fnum; /* current buffer */ 4832 *fnump = n; 4833 } 4834 4835 n = list_find_nr(l, i++, NULL); /* lnum */ 4836 if (n < 0) 4837 return FAIL; 4838 posp->lnum = n; 4839 4840 n = list_find_nr(l, i++, NULL); /* col */ 4841 if (n < 0) 4842 return FAIL; 4843 posp->col = n; 4844 4845 n = list_find_nr(l, i, NULL); /* off */ 4846 if (n < 0) 4847 posp->coladd = 0; 4848 else 4849 posp->coladd = n; 4850 4851 if (curswantp != NULL) 4852 *curswantp = list_find_nr(l, i + 1, NULL); /* curswant */ 4853 4854 return OK; 4855 } 4856 4857 /* 4858 * Get the length of an environment variable name. 4859 * Advance "arg" to the first character after the name. 4860 * Return 0 for error. 4861 */ 4862 int 4863 get_env_len(char_u **arg) 4864 { 4865 char_u *p; 4866 int len; 4867 4868 for (p = *arg; vim_isIDc(*p); ++p) 4869 ; 4870 if (p == *arg) /* no name found */ 4871 return 0; 4872 4873 len = (int)(p - *arg); 4874 *arg = p; 4875 return len; 4876 } 4877 4878 /* 4879 * Get the length of the name of a function or internal variable. 4880 * "arg" is advanced to the first non-white character after the name. 4881 * Return 0 if something is wrong. 4882 */ 4883 int 4884 get_id_len(char_u **arg) 4885 { 4886 char_u *p; 4887 int len; 4888 4889 /* Find the end of the name. */ 4890 for (p = *arg; eval_isnamec(*p); ++p) 4891 { 4892 if (*p == ':') 4893 { 4894 /* "s:" is start of "s:var", but "n:" is not and can be used in 4895 * slice "[n:]". Also "xx:" is not a namespace. */ 4896 len = (int)(p - *arg); 4897 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL) 4898 || len > 1) 4899 break; 4900 } 4901 } 4902 if (p == *arg) /* no name found */ 4903 return 0; 4904 4905 len = (int)(p - *arg); 4906 *arg = skipwhite(p); 4907 4908 return len; 4909 } 4910 4911 /* 4912 * Get the length of the name of a variable or function. 4913 * Only the name is recognized, does not handle ".key" or "[idx]". 4914 * "arg" is advanced to the first non-white character after the name. 4915 * Return -1 if curly braces expansion failed. 4916 * Return 0 if something else is wrong. 4917 * If the name contains 'magic' {}'s, expand them and return the 4918 * expanded name in an allocated string via 'alias' - caller must free. 4919 */ 4920 int 4921 get_name_len( 4922 char_u **arg, 4923 char_u **alias, 4924 int evaluate, 4925 int verbose) 4926 { 4927 int len; 4928 char_u *p; 4929 char_u *expr_start; 4930 char_u *expr_end; 4931 4932 *alias = NULL; /* default to no alias */ 4933 4934 if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA 4935 && (*arg)[2] == (int)KE_SNR) 4936 { 4937 /* hard coded <SNR>, already translated */ 4938 *arg += 3; 4939 return get_id_len(arg) + 3; 4940 } 4941 len = eval_fname_script(*arg); 4942 if (len > 0) 4943 { 4944 /* literal "<SID>", "s:" or "<SNR>" */ 4945 *arg += len; 4946 } 4947 4948 /* 4949 * Find the end of the name; check for {} construction. 4950 */ 4951 p = find_name_end(*arg, &expr_start, &expr_end, 4952 len > 0 ? 0 : FNE_CHECK_START); 4953 if (expr_start != NULL) 4954 { 4955 char_u *temp_string; 4956 4957 if (!evaluate) 4958 { 4959 len += (int)(p - *arg); 4960 *arg = skipwhite(p); 4961 return len; 4962 } 4963 4964 /* 4965 * Include any <SID> etc in the expanded string: 4966 * Thus the -len here. 4967 */ 4968 temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p); 4969 if (temp_string == NULL) 4970 return -1; 4971 *alias = temp_string; 4972 *arg = skipwhite(p); 4973 return (int)STRLEN(temp_string); 4974 } 4975 4976 len += get_id_len(arg); 4977 // Only give an error when there is something, otherwise it will be 4978 // reported at a higher level. 4979 if (len == 0 && verbose && **arg != NUL) 4980 semsg(_(e_invexpr2), *arg); 4981 4982 return len; 4983 } 4984 4985 /* 4986 * Find the end of a variable or function name, taking care of magic braces. 4987 * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the 4988 * start and end of the first magic braces item. 4989 * "flags" can have FNE_INCL_BR and FNE_CHECK_START. 4990 * Return a pointer to just after the name. Equal to "arg" if there is no 4991 * valid name. 4992 */ 4993 char_u * 4994 find_name_end( 4995 char_u *arg, 4996 char_u **expr_start, 4997 char_u **expr_end, 4998 int flags) 4999 { 5000 int mb_nest = 0; 5001 int br_nest = 0; 5002 char_u *p; 5003 int len; 5004 5005 if (expr_start != NULL) 5006 { 5007 *expr_start = NULL; 5008 *expr_end = NULL; 5009 } 5010 5011 /* Quick check for valid starting character. */ 5012 if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{') 5013 return arg; 5014 5015 for (p = arg; *p != NUL 5016 && (eval_isnamec(*p) 5017 || *p == '{' 5018 || ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.')) 5019 || mb_nest != 0 5020 || br_nest != 0); MB_PTR_ADV(p)) 5021 { 5022 if (*p == '\'') 5023 { 5024 /* skip over 'string' to avoid counting [ and ] inside it. */ 5025 for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p)) 5026 ; 5027 if (*p == NUL) 5028 break; 5029 } 5030 else if (*p == '"') 5031 { 5032 /* skip over "str\"ing" to avoid counting [ and ] inside it. */ 5033 for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p)) 5034 if (*p == '\\' && p[1] != NUL) 5035 ++p; 5036 if (*p == NUL) 5037 break; 5038 } 5039 else if (br_nest == 0 && mb_nest == 0 && *p == ':') 5040 { 5041 /* "s:" is start of "s:var", but "n:" is not and can be used in 5042 * slice "[n:]". Also "xx:" is not a namespace. But {ns}: is. */ 5043 len = (int)(p - arg); 5044 if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL) 5045 || (len > 1 && p[-1] != '}')) 5046 break; 5047 } 5048 5049 if (mb_nest == 0) 5050 { 5051 if (*p == '[') 5052 ++br_nest; 5053 else if (*p == ']') 5054 --br_nest; 5055 } 5056 5057 if (br_nest == 0) 5058 { 5059 if (*p == '{') 5060 { 5061 mb_nest++; 5062 if (expr_start != NULL && *expr_start == NULL) 5063 *expr_start = p; 5064 } 5065 else if (*p == '}') 5066 { 5067 mb_nest--; 5068 if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL) 5069 *expr_end = p; 5070 } 5071 } 5072 } 5073 5074 return p; 5075 } 5076 5077 /* 5078 * Expands out the 'magic' {}'s in a variable/function name. 5079 * Note that this can call itself recursively, to deal with 5080 * constructs like foo{bar}{baz}{bam} 5081 * The four pointer arguments point to "foo{expre}ss{ion}bar" 5082 * "in_start" ^ 5083 * "expr_start" ^ 5084 * "expr_end" ^ 5085 * "in_end" ^ 5086 * 5087 * Returns a new allocated string, which the caller must free. 5088 * Returns NULL for failure. 5089 */ 5090 static char_u * 5091 make_expanded_name( 5092 char_u *in_start, 5093 char_u *expr_start, 5094 char_u *expr_end, 5095 char_u *in_end) 5096 { 5097 char_u c1; 5098 char_u *retval = NULL; 5099 char_u *temp_result; 5100 char_u *nextcmd = NULL; 5101 5102 if (expr_end == NULL || in_end == NULL) 5103 return NULL; 5104 *expr_start = NUL; 5105 *expr_end = NUL; 5106 c1 = *in_end; 5107 *in_end = NUL; 5108 5109 temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE); 5110 if (temp_result != NULL && nextcmd == NULL) 5111 { 5112 retval = alloc(STRLEN(temp_result) + (expr_start - in_start) 5113 + (in_end - expr_end) + 1); 5114 if (retval != NULL) 5115 { 5116 STRCPY(retval, in_start); 5117 STRCAT(retval, temp_result); 5118 STRCAT(retval, expr_end + 1); 5119 } 5120 } 5121 vim_free(temp_result); 5122 5123 *in_end = c1; /* put char back for error messages */ 5124 *expr_start = '{'; 5125 *expr_end = '}'; 5126 5127 if (retval != NULL) 5128 { 5129 temp_result = find_name_end(retval, &expr_start, &expr_end, 0); 5130 if (expr_start != NULL) 5131 { 5132 /* Further expansion! */ 5133 temp_result = make_expanded_name(retval, expr_start, 5134 expr_end, temp_result); 5135 vim_free(retval); 5136 retval = temp_result; 5137 } 5138 } 5139 5140 return retval; 5141 } 5142 5143 /* 5144 * Return TRUE if character "c" can be used in a variable or function name. 5145 * Does not include '{' or '}' for magic braces. 5146 */ 5147 int 5148 eval_isnamec(int c) 5149 { 5150 return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR); 5151 } 5152 5153 /* 5154 * Return TRUE if character "c" can be used as the first character in a 5155 * variable or function name (excluding '{' and '}'). 5156 */ 5157 int 5158 eval_isnamec1(int c) 5159 { 5160 return (ASCII_ISALPHA(c) || c == '_'); 5161 } 5162 5163 /* 5164 * Handle: 5165 * - expr[expr], expr[expr:expr] subscript 5166 * - ".name" lookup 5167 * - function call with Funcref variable: func(expr) 5168 * - method call: var->method() 5169 * 5170 * Can all be combined in any order: dict.func(expr)[idx]['func'](expr)->len() 5171 */ 5172 int 5173 handle_subscript( 5174 char_u **arg, 5175 typval_T *rettv, 5176 int evaluate, // do more than finding the end 5177 int verbose, // give error messages 5178 char_u *start_leader, // start of '!' and '-' prefixes 5179 char_u **end_leaderp) // end of '!' and '-' prefixes 5180 { 5181 int ret = OK; 5182 dict_T *selfdict = NULL; 5183 5184 // "." is ".name" lookup when we found a dict or when evaluating and 5185 // scriptversion is at least 2, where string concatenation is "..". 5186 while (ret == OK 5187 && (((**arg == '[' 5188 || (**arg == '.' && (rettv->v_type == VAR_DICT 5189 || (!evaluate 5190 && (*arg)[1] != '.' 5191 && current_sctx.sc_version >= 2))) 5192 || (**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC 5193 || rettv->v_type == VAR_PARTIAL))) 5194 && !VIM_ISWHITE(*(*arg - 1))) 5195 || (**arg == '-' && (*arg)[1] == '>'))) 5196 { 5197 if (**arg == '(') 5198 { 5199 ret = call_func_rettv(arg, rettv, evaluate, selfdict, NULL); 5200 5201 // Stop the expression evaluation when immediately aborting on 5202 // error, or when an interrupt occurred or an exception was thrown 5203 // but not caught. 5204 if (aborting()) 5205 { 5206 if (ret == OK) 5207 clear_tv(rettv); 5208 ret = FAIL; 5209 } 5210 dict_unref(selfdict); 5211 selfdict = NULL; 5212 } 5213 else if (**arg == '-') 5214 { 5215 // Expression "-1.0->method()" applies the leader "-" before 5216 // applying ->. 5217 if (evaluate && *end_leaderp > start_leader) 5218 ret = eval7_leader(rettv, start_leader, end_leaderp); 5219 if (ret == OK) 5220 { 5221 if ((*arg)[2] == '{') 5222 // expr->{lambda}() 5223 ret = eval_lambda(arg, rettv, evaluate, verbose); 5224 else 5225 // expr->name() 5226 ret = eval_method(arg, rettv, evaluate, verbose); 5227 } 5228 } 5229 else /* **arg == '[' || **arg == '.' */ 5230 { 5231 dict_unref(selfdict); 5232 if (rettv->v_type == VAR_DICT) 5233 { 5234 selfdict = rettv->vval.v_dict; 5235 if (selfdict != NULL) 5236 ++selfdict->dv_refcount; 5237 } 5238 else 5239 selfdict = NULL; 5240 if (eval_index(arg, rettv, evaluate, verbose) == FAIL) 5241 { 5242 clear_tv(rettv); 5243 ret = FAIL; 5244 } 5245 } 5246 } 5247 5248 /* Turn "dict.Func" into a partial for "Func" bound to "dict". 5249 * Don't do this when "Func" is already a partial that was bound 5250 * explicitly (pt_auto is FALSE). */ 5251 if (selfdict != NULL 5252 && (rettv->v_type == VAR_FUNC 5253 || (rettv->v_type == VAR_PARTIAL 5254 && (rettv->vval.v_partial->pt_auto 5255 || rettv->vval.v_partial->pt_dict == NULL)))) 5256 selfdict = make_partial(selfdict, rettv); 5257 5258 dict_unref(selfdict); 5259 return ret; 5260 } 5261 5262 /* 5263 * Allocate memory for a variable type-value, and make it empty (0 or NULL 5264 * value). 5265 */ 5266 typval_T * 5267 alloc_tv(void) 5268 { 5269 return ALLOC_CLEAR_ONE(typval_T); 5270 } 5271 5272 /* 5273 * Allocate memory for a variable type-value, and assign a string to it. 5274 * The string "s" must have been allocated, it is consumed. 5275 * Return NULL for out of memory, the variable otherwise. 5276 */ 5277 typval_T * 5278 alloc_string_tv(char_u *s) 5279 { 5280 typval_T *rettv; 5281 5282 rettv = alloc_tv(); 5283 if (rettv != NULL) 5284 { 5285 rettv->v_type = VAR_STRING; 5286 rettv->vval.v_string = s; 5287 } 5288 else 5289 vim_free(s); 5290 return rettv; 5291 } 5292 5293 /* 5294 * Free the memory for a variable type-value. 5295 */ 5296 void 5297 free_tv(typval_T *varp) 5298 { 5299 if (varp != NULL) 5300 { 5301 switch (varp->v_type) 5302 { 5303 case VAR_FUNC: 5304 func_unref(varp->vval.v_string); 5305 /* FALLTHROUGH */ 5306 case VAR_STRING: 5307 vim_free(varp->vval.v_string); 5308 break; 5309 case VAR_PARTIAL: 5310 partial_unref(varp->vval.v_partial); 5311 break; 5312 case VAR_BLOB: 5313 blob_unref(varp->vval.v_blob); 5314 break; 5315 case VAR_LIST: 5316 list_unref(varp->vval.v_list); 5317 break; 5318 case VAR_DICT: 5319 dict_unref(varp->vval.v_dict); 5320 break; 5321 case VAR_JOB: 5322 #ifdef FEAT_JOB_CHANNEL 5323 job_unref(varp->vval.v_job); 5324 break; 5325 #endif 5326 case VAR_CHANNEL: 5327 #ifdef FEAT_JOB_CHANNEL 5328 channel_unref(varp->vval.v_channel); 5329 break; 5330 #endif 5331 case VAR_NUMBER: 5332 case VAR_FLOAT: 5333 case VAR_UNKNOWN: 5334 case VAR_SPECIAL: 5335 break; 5336 } 5337 vim_free(varp); 5338 } 5339 } 5340 5341 /* 5342 * Free the memory for a variable value and set the value to NULL or 0. 5343 */ 5344 void 5345 clear_tv(typval_T *varp) 5346 { 5347 if (varp != NULL) 5348 { 5349 switch (varp->v_type) 5350 { 5351 case VAR_FUNC: 5352 func_unref(varp->vval.v_string); 5353 /* FALLTHROUGH */ 5354 case VAR_STRING: 5355 VIM_CLEAR(varp->vval.v_string); 5356 break; 5357 case VAR_PARTIAL: 5358 partial_unref(varp->vval.v_partial); 5359 varp->vval.v_partial = NULL; 5360 break; 5361 case VAR_BLOB: 5362 blob_unref(varp->vval.v_blob); 5363 varp->vval.v_blob = NULL; 5364 break; 5365 case VAR_LIST: 5366 list_unref(varp->vval.v_list); 5367 varp->vval.v_list = NULL; 5368 break; 5369 case VAR_DICT: 5370 dict_unref(varp->vval.v_dict); 5371 varp->vval.v_dict = NULL; 5372 break; 5373 case VAR_NUMBER: 5374 case VAR_SPECIAL: 5375 varp->vval.v_number = 0; 5376 break; 5377 case VAR_FLOAT: 5378 #ifdef FEAT_FLOAT 5379 varp->vval.v_float = 0.0; 5380 break; 5381 #endif 5382 case VAR_JOB: 5383 #ifdef FEAT_JOB_CHANNEL 5384 job_unref(varp->vval.v_job); 5385 varp->vval.v_job = NULL; 5386 #endif 5387 break; 5388 case VAR_CHANNEL: 5389 #ifdef FEAT_JOB_CHANNEL 5390 channel_unref(varp->vval.v_channel); 5391 varp->vval.v_channel = NULL; 5392 #endif 5393 case VAR_UNKNOWN: 5394 break; 5395 } 5396 varp->v_lock = 0; 5397 } 5398 } 5399 5400 /* 5401 * Set the value of a variable to NULL without freeing items. 5402 */ 5403 void 5404 init_tv(typval_T *varp) 5405 { 5406 if (varp != NULL) 5407 vim_memset(varp, 0, sizeof(typval_T)); 5408 } 5409 5410 /* 5411 * Get the number value of a variable. 5412 * If it is a String variable, uses vim_str2nr(). 5413 * For incompatible types, return 0. 5414 * tv_get_number_chk() is similar to tv_get_number(), but informs the 5415 * caller of incompatible types: it sets *denote to TRUE if "denote" 5416 * is not NULL or returns -1 otherwise. 5417 */ 5418 varnumber_T 5419 tv_get_number(typval_T *varp) 5420 { 5421 int error = FALSE; 5422 5423 return tv_get_number_chk(varp, &error); /* return 0L on error */ 5424 } 5425 5426 varnumber_T 5427 tv_get_number_chk(typval_T *varp, int *denote) 5428 { 5429 varnumber_T n = 0L; 5430 5431 switch (varp->v_type) 5432 { 5433 case VAR_NUMBER: 5434 return varp->vval.v_number; 5435 case VAR_FLOAT: 5436 #ifdef FEAT_FLOAT 5437 emsg(_("E805: Using a Float as a Number")); 5438 break; 5439 #endif 5440 case VAR_FUNC: 5441 case VAR_PARTIAL: 5442 emsg(_("E703: Using a Funcref as a Number")); 5443 break; 5444 case VAR_STRING: 5445 if (varp->vval.v_string != NULL) 5446 vim_str2nr(varp->vval.v_string, NULL, NULL, 5447 STR2NR_ALL, &n, NULL, 0, FALSE); 5448 return n; 5449 case VAR_LIST: 5450 emsg(_("E745: Using a List as a Number")); 5451 break; 5452 case VAR_DICT: 5453 emsg(_("E728: Using a Dictionary as a Number")); 5454 break; 5455 case VAR_SPECIAL: 5456 return varp->vval.v_number == VVAL_TRUE ? 1 : 0; 5457 break; 5458 case VAR_JOB: 5459 #ifdef FEAT_JOB_CHANNEL 5460 emsg(_("E910: Using a Job as a Number")); 5461 break; 5462 #endif 5463 case VAR_CHANNEL: 5464 #ifdef FEAT_JOB_CHANNEL 5465 emsg(_("E913: Using a Channel as a Number")); 5466 break; 5467 #endif 5468 case VAR_BLOB: 5469 emsg(_("E974: Using a Blob as a Number")); 5470 break; 5471 case VAR_UNKNOWN: 5472 internal_error("tv_get_number(UNKNOWN)"); 5473 break; 5474 } 5475 if (denote == NULL) /* useful for values that must be unsigned */ 5476 n = -1; 5477 else 5478 *denote = TRUE; 5479 return n; 5480 } 5481 5482 #ifdef FEAT_FLOAT 5483 float_T 5484 tv_get_float(typval_T *varp) 5485 { 5486 switch (varp->v_type) 5487 { 5488 case VAR_NUMBER: 5489 return (float_T)(varp->vval.v_number); 5490 case VAR_FLOAT: 5491 return varp->vval.v_float; 5492 case VAR_FUNC: 5493 case VAR_PARTIAL: 5494 emsg(_("E891: Using a Funcref as a Float")); 5495 break; 5496 case VAR_STRING: 5497 emsg(_("E892: Using a String as a Float")); 5498 break; 5499 case VAR_LIST: 5500 emsg(_("E893: Using a List as a Float")); 5501 break; 5502 case VAR_DICT: 5503 emsg(_("E894: Using a Dictionary as a Float")); 5504 break; 5505 case VAR_SPECIAL: 5506 emsg(_("E907: Using a special value as a Float")); 5507 break; 5508 case VAR_JOB: 5509 # ifdef FEAT_JOB_CHANNEL 5510 emsg(_("E911: Using a Job as a Float")); 5511 break; 5512 # endif 5513 case VAR_CHANNEL: 5514 # ifdef FEAT_JOB_CHANNEL 5515 emsg(_("E914: Using a Channel as a Float")); 5516 break; 5517 # endif 5518 case VAR_BLOB: 5519 emsg(_("E975: Using a Blob as a Float")); 5520 break; 5521 case VAR_UNKNOWN: 5522 internal_error("tv_get_float(UNKNOWN)"); 5523 break; 5524 } 5525 return 0; 5526 } 5527 #endif 5528 5529 /* 5530 * Get the string value of a variable. 5531 * If it is a Number variable, the number is converted into a string. 5532 * tv_get_string() uses a single, static buffer. YOU CAN ONLY USE IT ONCE! 5533 * tv_get_string_buf() uses a given buffer. 5534 * If the String variable has never been set, return an empty string. 5535 * Never returns NULL; 5536 * tv_get_string_chk() and tv_get_string_buf_chk() are similar, but return 5537 * NULL on error. 5538 */ 5539 char_u * 5540 tv_get_string(typval_T *varp) 5541 { 5542 static char_u mybuf[NUMBUFLEN]; 5543 5544 return tv_get_string_buf(varp, mybuf); 5545 } 5546 5547 char_u * 5548 tv_get_string_buf(typval_T *varp, char_u *buf) 5549 { 5550 char_u *res = tv_get_string_buf_chk(varp, buf); 5551 5552 return res != NULL ? res : (char_u *)""; 5553 } 5554 5555 /* 5556 * Careful: This uses a single, static buffer. YOU CAN ONLY USE IT ONCE! 5557 */ 5558 char_u * 5559 tv_get_string_chk(typval_T *varp) 5560 { 5561 static char_u mybuf[NUMBUFLEN]; 5562 5563 return tv_get_string_buf_chk(varp, mybuf); 5564 } 5565 5566 char_u * 5567 tv_get_string_buf_chk(typval_T *varp, char_u *buf) 5568 { 5569 switch (varp->v_type) 5570 { 5571 case VAR_NUMBER: 5572 vim_snprintf((char *)buf, NUMBUFLEN, "%lld", 5573 (long_long_T)varp->vval.v_number); 5574 return buf; 5575 case VAR_FUNC: 5576 case VAR_PARTIAL: 5577 emsg(_("E729: using Funcref as a String")); 5578 break; 5579 case VAR_LIST: 5580 emsg(_("E730: using List as a String")); 5581 break; 5582 case VAR_DICT: 5583 emsg(_("E731: using Dictionary as a String")); 5584 break; 5585 case VAR_FLOAT: 5586 #ifdef FEAT_FLOAT 5587 emsg(_(e_float_as_string)); 5588 break; 5589 #endif 5590 case VAR_STRING: 5591 if (varp->vval.v_string != NULL) 5592 return varp->vval.v_string; 5593 return (char_u *)""; 5594 case VAR_SPECIAL: 5595 STRCPY(buf, get_var_special_name(varp->vval.v_number)); 5596 return buf; 5597 case VAR_BLOB: 5598 emsg(_("E976: using Blob as a String")); 5599 break; 5600 case VAR_JOB: 5601 #ifdef FEAT_JOB_CHANNEL 5602 { 5603 job_T *job = varp->vval.v_job; 5604 char *status; 5605 5606 if (job == NULL) 5607 return (char_u *)"no process"; 5608 status = job->jv_status == JOB_FAILED ? "fail" 5609 : job->jv_status >= JOB_ENDED ? "dead" 5610 : "run"; 5611 # ifdef UNIX 5612 vim_snprintf((char *)buf, NUMBUFLEN, 5613 "process %ld %s", (long)job->jv_pid, status); 5614 # elif defined(MSWIN) 5615 vim_snprintf((char *)buf, NUMBUFLEN, 5616 "process %ld %s", 5617 (long)job->jv_proc_info.dwProcessId, 5618 status); 5619 # else 5620 /* fall-back */ 5621 vim_snprintf((char *)buf, NUMBUFLEN, "process ? %s", status); 5622 # endif 5623 return buf; 5624 } 5625 #endif 5626 break; 5627 case VAR_CHANNEL: 5628 #ifdef FEAT_JOB_CHANNEL 5629 { 5630 channel_T *channel = varp->vval.v_channel; 5631 char *status = channel_status(channel, -1); 5632 5633 if (channel == NULL) 5634 vim_snprintf((char *)buf, NUMBUFLEN, "channel %s", status); 5635 else 5636 vim_snprintf((char *)buf, NUMBUFLEN, 5637 "channel %d %s", channel->ch_id, status); 5638 return buf; 5639 } 5640 #endif 5641 break; 5642 case VAR_UNKNOWN: 5643 emsg(_("E908: using an invalid value as a String")); 5644 break; 5645 } 5646 return NULL; 5647 } 5648 5649 /* 5650 * Turn a typeval into a string. Similar to tv_get_string_buf() but uses 5651 * string() on Dict, List, etc. 5652 */ 5653 static char_u * 5654 tv_stringify(typval_T *varp, char_u *buf) 5655 { 5656 if (varp->v_type == VAR_LIST 5657 || varp->v_type == VAR_DICT 5658 || varp->v_type == VAR_FUNC 5659 || varp->v_type == VAR_PARTIAL 5660 || varp->v_type == VAR_FLOAT) 5661 { 5662 typval_T tmp; 5663 5664 f_string(varp, &tmp); 5665 tv_get_string_buf(&tmp, buf); 5666 clear_tv(varp); 5667 *varp = tmp; 5668 return tmp.vval.v_string; 5669 } 5670 return tv_get_string_buf(varp, buf); 5671 } 5672 5673 /* 5674 * Return TRUE if typeval "tv" and its value are set to be locked (immutable). 5675 * Also give an error message, using "name" or _("name") when use_gettext is 5676 * TRUE. 5677 */ 5678 static int 5679 tv_check_lock(typval_T *tv, char_u *name, int use_gettext) 5680 { 5681 int lock = 0; 5682 5683 switch (tv->v_type) 5684 { 5685 case VAR_BLOB: 5686 if (tv->vval.v_blob != NULL) 5687 lock = tv->vval.v_blob->bv_lock; 5688 break; 5689 case VAR_LIST: 5690 if (tv->vval.v_list != NULL) 5691 lock = tv->vval.v_list->lv_lock; 5692 break; 5693 case VAR_DICT: 5694 if (tv->vval.v_dict != NULL) 5695 lock = tv->vval.v_dict->dv_lock; 5696 break; 5697 default: 5698 break; 5699 } 5700 return var_check_lock(tv->v_lock, name, use_gettext) 5701 || (lock != 0 && var_check_lock(lock, name, use_gettext)); 5702 } 5703 5704 /* 5705 * Copy the values from typval_T "from" to typval_T "to". 5706 * When needed allocates string or increases reference count. 5707 * Does not make a copy of a list, blob or dict but copies the reference! 5708 * It is OK for "from" and "to" to point to the same item. This is used to 5709 * make a copy later. 5710 */ 5711 void 5712 copy_tv(typval_T *from, typval_T *to) 5713 { 5714 to->v_type = from->v_type; 5715 to->v_lock = 0; 5716 switch (from->v_type) 5717 { 5718 case VAR_NUMBER: 5719 case VAR_SPECIAL: 5720 to->vval.v_number = from->vval.v_number; 5721 break; 5722 case VAR_FLOAT: 5723 #ifdef FEAT_FLOAT 5724 to->vval.v_float = from->vval.v_float; 5725 break; 5726 #endif 5727 case VAR_JOB: 5728 #ifdef FEAT_JOB_CHANNEL 5729 to->vval.v_job = from->vval.v_job; 5730 if (to->vval.v_job != NULL) 5731 ++to->vval.v_job->jv_refcount; 5732 break; 5733 #endif 5734 case VAR_CHANNEL: 5735 #ifdef FEAT_JOB_CHANNEL 5736 to->vval.v_channel = from->vval.v_channel; 5737 if (to->vval.v_channel != NULL) 5738 ++to->vval.v_channel->ch_refcount; 5739 break; 5740 #endif 5741 case VAR_STRING: 5742 case VAR_FUNC: 5743 if (from->vval.v_string == NULL) 5744 to->vval.v_string = NULL; 5745 else 5746 { 5747 to->vval.v_string = vim_strsave(from->vval.v_string); 5748 if (from->v_type == VAR_FUNC) 5749 func_ref(to->vval.v_string); 5750 } 5751 break; 5752 case VAR_PARTIAL: 5753 if (from->vval.v_partial == NULL) 5754 to->vval.v_partial = NULL; 5755 else 5756 { 5757 to->vval.v_partial = from->vval.v_partial; 5758 ++to->vval.v_partial->pt_refcount; 5759 } 5760 break; 5761 case VAR_BLOB: 5762 if (from->vval.v_blob == NULL) 5763 to->vval.v_blob = NULL; 5764 else 5765 { 5766 to->vval.v_blob = from->vval.v_blob; 5767 ++to->vval.v_blob->bv_refcount; 5768 } 5769 break; 5770 case VAR_LIST: 5771 if (from->vval.v_list == NULL) 5772 to->vval.v_list = NULL; 5773 else 5774 { 5775 to->vval.v_list = from->vval.v_list; 5776 ++to->vval.v_list->lv_refcount; 5777 } 5778 break; 5779 case VAR_DICT: 5780 if (from->vval.v_dict == NULL) 5781 to->vval.v_dict = NULL; 5782 else 5783 { 5784 to->vval.v_dict = from->vval.v_dict; 5785 ++to->vval.v_dict->dv_refcount; 5786 } 5787 break; 5788 case VAR_UNKNOWN: 5789 internal_error("copy_tv(UNKNOWN)"); 5790 break; 5791 } 5792 } 5793 5794 /* 5795 * Make a copy of an item. 5796 * Lists and Dictionaries are also copied. A deep copy if "deep" is set. 5797 * For deepcopy() "copyID" is zero for a full copy or the ID for when a 5798 * reference to an already copied list/dict can be used. 5799 * Returns FAIL or OK. 5800 */ 5801 int 5802 item_copy( 5803 typval_T *from, 5804 typval_T *to, 5805 int deep, 5806 int copyID) 5807 { 5808 static int recurse = 0; 5809 int ret = OK; 5810 5811 if (recurse >= DICT_MAXNEST) 5812 { 5813 emsg(_("E698: variable nested too deep for making a copy")); 5814 return FAIL; 5815 } 5816 ++recurse; 5817 5818 switch (from->v_type) 5819 { 5820 case VAR_NUMBER: 5821 case VAR_FLOAT: 5822 case VAR_STRING: 5823 case VAR_FUNC: 5824 case VAR_PARTIAL: 5825 case VAR_SPECIAL: 5826 case VAR_JOB: 5827 case VAR_CHANNEL: 5828 copy_tv(from, to); 5829 break; 5830 case VAR_LIST: 5831 to->v_type = VAR_LIST; 5832 to->v_lock = 0; 5833 if (from->vval.v_list == NULL) 5834 to->vval.v_list = NULL; 5835 else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID) 5836 { 5837 /* use the copy made earlier */ 5838 to->vval.v_list = from->vval.v_list->lv_copylist; 5839 ++to->vval.v_list->lv_refcount; 5840 } 5841 else 5842 to->vval.v_list = list_copy(from->vval.v_list, deep, copyID); 5843 if (to->vval.v_list == NULL) 5844 ret = FAIL; 5845 break; 5846 case VAR_BLOB: 5847 ret = blob_copy(from, to); 5848 break; 5849 case VAR_DICT: 5850 to->v_type = VAR_DICT; 5851 to->v_lock = 0; 5852 if (from->vval.v_dict == NULL) 5853 to->vval.v_dict = NULL; 5854 else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID) 5855 { 5856 /* use the copy made earlier */ 5857 to->vval.v_dict = from->vval.v_dict->dv_copydict; 5858 ++to->vval.v_dict->dv_refcount; 5859 } 5860 else 5861 to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID); 5862 if (to->vval.v_dict == NULL) 5863 ret = FAIL; 5864 break; 5865 case VAR_UNKNOWN: 5866 internal_error("item_copy(UNKNOWN)"); 5867 ret = FAIL; 5868 } 5869 --recurse; 5870 return ret; 5871 } 5872 5873 /* 5874 * ":echo expr1 ..." print each argument separated with a space, add a 5875 * newline at the end. 5876 * ":echon expr1 ..." print each argument plain. 5877 */ 5878 void 5879 ex_echo(exarg_T *eap) 5880 { 5881 char_u *arg = eap->arg; 5882 typval_T rettv; 5883 char_u *tofree; 5884 char_u *p; 5885 int needclr = TRUE; 5886 int atstart = TRUE; 5887 char_u numbuf[NUMBUFLEN]; 5888 int did_emsg_before = did_emsg; 5889 int called_emsg_before = called_emsg; 5890 5891 if (eap->skip) 5892 ++emsg_skip; 5893 while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int) 5894 { 5895 /* If eval1() causes an error message the text from the command may 5896 * still need to be cleared. E.g., "echo 22,44". */ 5897 need_clr_eos = needclr; 5898 5899 p = arg; 5900 if (eval1(&arg, &rettv, !eap->skip) == FAIL) 5901 { 5902 /* 5903 * Report the invalid expression unless the expression evaluation 5904 * has been cancelled due to an aborting error, an interrupt, or an 5905 * exception. 5906 */ 5907 if (!aborting() && did_emsg == did_emsg_before 5908 && called_emsg == called_emsg_before) 5909 semsg(_(e_invexpr2), p); 5910 need_clr_eos = FALSE; 5911 break; 5912 } 5913 need_clr_eos = FALSE; 5914 5915 if (!eap->skip) 5916 { 5917 if (atstart) 5918 { 5919 atstart = FALSE; 5920 /* Call msg_start() after eval1(), evaluating the expression 5921 * may cause a message to appear. */ 5922 if (eap->cmdidx == CMD_echo) 5923 { 5924 /* Mark the saved text as finishing the line, so that what 5925 * follows is displayed on a new line when scrolling back 5926 * at the more prompt. */ 5927 msg_sb_eol(); 5928 msg_start(); 5929 } 5930 } 5931 else if (eap->cmdidx == CMD_echo) 5932 msg_puts_attr(" ", echo_attr); 5933 p = echo_string(&rettv, &tofree, numbuf, get_copyID()); 5934 if (p != NULL) 5935 for ( ; *p != NUL && !got_int; ++p) 5936 { 5937 if (*p == '\n' || *p == '\r' || *p == TAB) 5938 { 5939 if (*p != TAB && needclr) 5940 { 5941 /* remove any text still there from the command */ 5942 msg_clr_eos(); 5943 needclr = FALSE; 5944 } 5945 msg_putchar_attr(*p, echo_attr); 5946 } 5947 else 5948 { 5949 if (has_mbyte) 5950 { 5951 int i = (*mb_ptr2len)(p); 5952 5953 (void)msg_outtrans_len_attr(p, i, echo_attr); 5954 p += i - 1; 5955 } 5956 else 5957 (void)msg_outtrans_len_attr(p, 1, echo_attr); 5958 } 5959 } 5960 vim_free(tofree); 5961 } 5962 clear_tv(&rettv); 5963 arg = skipwhite(arg); 5964 } 5965 eap->nextcmd = check_nextcmd(arg); 5966 5967 if (eap->skip) 5968 --emsg_skip; 5969 else 5970 { 5971 /* remove text that may still be there from the command */ 5972 if (needclr) 5973 msg_clr_eos(); 5974 if (eap->cmdidx == CMD_echo) 5975 msg_end(); 5976 } 5977 } 5978 5979 /* 5980 * ":echohl {name}". 5981 */ 5982 void 5983 ex_echohl(exarg_T *eap) 5984 { 5985 echo_attr = syn_name2attr(eap->arg); 5986 } 5987 5988 /* 5989 * Returns the :echo attribute 5990 */ 5991 int 5992 get_echo_attr(void) 5993 { 5994 return echo_attr; 5995 } 5996 5997 /* 5998 * ":execute expr1 ..." execute the result of an expression. 5999 * ":echomsg expr1 ..." Print a message 6000 * ":echoerr expr1 ..." Print an error 6001 * Each gets spaces around each argument and a newline at the end for 6002 * echo commands 6003 */ 6004 void 6005 ex_execute(exarg_T *eap) 6006 { 6007 char_u *arg = eap->arg; 6008 typval_T rettv; 6009 int ret = OK; 6010 char_u *p; 6011 garray_T ga; 6012 int len; 6013 int save_did_emsg; 6014 6015 ga_init2(&ga, 1, 80); 6016 6017 if (eap->skip) 6018 ++emsg_skip; 6019 while (*arg != NUL && *arg != '|' && *arg != '\n') 6020 { 6021 ret = eval1_emsg(&arg, &rettv, !eap->skip); 6022 if (ret == FAIL) 6023 break; 6024 6025 if (!eap->skip) 6026 { 6027 char_u buf[NUMBUFLEN]; 6028 6029 if (eap->cmdidx == CMD_execute) 6030 p = tv_get_string_buf(&rettv, buf); 6031 else 6032 p = tv_stringify(&rettv, buf); 6033 len = (int)STRLEN(p); 6034 if (ga_grow(&ga, len + 2) == FAIL) 6035 { 6036 clear_tv(&rettv); 6037 ret = FAIL; 6038 break; 6039 } 6040 if (ga.ga_len) 6041 ((char_u *)(ga.ga_data))[ga.ga_len++] = ' '; 6042 STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p); 6043 ga.ga_len += len; 6044 } 6045 6046 clear_tv(&rettv); 6047 arg = skipwhite(arg); 6048 } 6049 6050 if (ret != FAIL && ga.ga_data != NULL) 6051 { 6052 if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr) 6053 { 6054 /* Mark the already saved text as finishing the line, so that what 6055 * follows is displayed on a new line when scrolling back at the 6056 * more prompt. */ 6057 msg_sb_eol(); 6058 } 6059 6060 if (eap->cmdidx == CMD_echomsg) 6061 { 6062 msg_attr(ga.ga_data, echo_attr); 6063 out_flush(); 6064 } 6065 else if (eap->cmdidx == CMD_echoerr) 6066 { 6067 /* We don't want to abort following commands, restore did_emsg. */ 6068 save_did_emsg = did_emsg; 6069 emsg(ga.ga_data); 6070 if (!force_abort) 6071 did_emsg = save_did_emsg; 6072 } 6073 else if (eap->cmdidx == CMD_execute) 6074 do_cmdline((char_u *)ga.ga_data, 6075 eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE); 6076 } 6077 6078 ga_clear(&ga); 6079 6080 if (eap->skip) 6081 --emsg_skip; 6082 6083 eap->nextcmd = check_nextcmd(arg); 6084 } 6085 6086 /* 6087 * Skip over the name of an option: "&option", "&g:option" or "&l:option". 6088 * "arg" points to the "&" or '+' when called, to "option" when returning. 6089 * Returns NULL when no option name found. Otherwise pointer to the char 6090 * after the option name. 6091 */ 6092 char_u * 6093 find_option_end(char_u **arg, int *opt_flags) 6094 { 6095 char_u *p = *arg; 6096 6097 ++p; 6098 if (*p == 'g' && p[1] == ':') 6099 { 6100 *opt_flags = OPT_GLOBAL; 6101 p += 2; 6102 } 6103 else if (*p == 'l' && p[1] == ':') 6104 { 6105 *opt_flags = OPT_LOCAL; 6106 p += 2; 6107 } 6108 else 6109 *opt_flags = 0; 6110 6111 if (!ASCII_ISALPHA(*p)) 6112 return NULL; 6113 *arg = p; 6114 6115 if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL) 6116 p += 4; /* termcap option */ 6117 else 6118 while (ASCII_ISALPHA(*p)) 6119 ++p; 6120 return p; 6121 } 6122 6123 /* 6124 * Display script name where an item was last set. 6125 * Should only be invoked when 'verbose' is non-zero. 6126 */ 6127 void 6128 last_set_msg(sctx_T script_ctx) 6129 { 6130 char_u *p; 6131 6132 if (script_ctx.sc_sid != 0) 6133 { 6134 p = home_replace_save(NULL, get_scriptname(script_ctx.sc_sid)); 6135 if (p != NULL) 6136 { 6137 verbose_enter(); 6138 msg_puts(_("\n\tLast set from ")); 6139 msg_puts((char *)p); 6140 if (script_ctx.sc_lnum > 0) 6141 { 6142 msg_puts(_(" line ")); 6143 msg_outnum((long)script_ctx.sc_lnum); 6144 } 6145 verbose_leave(); 6146 vim_free(p); 6147 } 6148 } 6149 } 6150 6151 /* 6152 * Compare "typ1" and "typ2". Put the result in "typ1". 6153 */ 6154 int 6155 typval_compare( 6156 typval_T *typ1, /* first operand */ 6157 typval_T *typ2, /* second operand */ 6158 exptype_T type, /* operator */ 6159 int type_is, /* TRUE for "is" and "isnot" */ 6160 int ic) /* ignore case */ 6161 { 6162 int i; 6163 varnumber_T n1, n2; 6164 char_u *s1, *s2; 6165 char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN]; 6166 6167 if (type_is && typ1->v_type != typ2->v_type) 6168 { 6169 /* For "is" a different type always means FALSE, for "notis" 6170 * it means TRUE. */ 6171 n1 = (type == TYPE_NEQUAL); 6172 } 6173 else if (typ1->v_type == VAR_BLOB || typ2->v_type == VAR_BLOB) 6174 { 6175 if (type_is) 6176 { 6177 n1 = (typ1->v_type == typ2->v_type 6178 && typ1->vval.v_blob == typ2->vval.v_blob); 6179 if (type == TYPE_NEQUAL) 6180 n1 = !n1; 6181 } 6182 else if (typ1->v_type != typ2->v_type 6183 || (type != TYPE_EQUAL && type != TYPE_NEQUAL)) 6184 { 6185 if (typ1->v_type != typ2->v_type) 6186 emsg(_("E977: Can only compare Blob with Blob")); 6187 else 6188 emsg(_(e_invalblob)); 6189 clear_tv(typ1); 6190 return FAIL; 6191 } 6192 else 6193 { 6194 // Compare two Blobs for being equal or unequal. 6195 n1 = blob_equal(typ1->vval.v_blob, typ2->vval.v_blob); 6196 if (type == TYPE_NEQUAL) 6197 n1 = !n1; 6198 } 6199 } 6200 else if (typ1->v_type == VAR_LIST || typ2->v_type == VAR_LIST) 6201 { 6202 if (type_is) 6203 { 6204 n1 = (typ1->v_type == typ2->v_type 6205 && typ1->vval.v_list == typ2->vval.v_list); 6206 if (type == TYPE_NEQUAL) 6207 n1 = !n1; 6208 } 6209 else if (typ1->v_type != typ2->v_type 6210 || (type != TYPE_EQUAL && type != TYPE_NEQUAL)) 6211 { 6212 if (typ1->v_type != typ2->v_type) 6213 emsg(_("E691: Can only compare List with List")); 6214 else 6215 emsg(_("E692: Invalid operation for List")); 6216 clear_tv(typ1); 6217 return FAIL; 6218 } 6219 else 6220 { 6221 /* Compare two Lists for being equal or unequal. */ 6222 n1 = list_equal(typ1->vval.v_list, typ2->vval.v_list, 6223 ic, FALSE); 6224 if (type == TYPE_NEQUAL) 6225 n1 = !n1; 6226 } 6227 } 6228 6229 else if (typ1->v_type == VAR_DICT || typ2->v_type == VAR_DICT) 6230 { 6231 if (type_is) 6232 { 6233 n1 = (typ1->v_type == typ2->v_type 6234 && typ1->vval.v_dict == typ2->vval.v_dict); 6235 if (type == TYPE_NEQUAL) 6236 n1 = !n1; 6237 } 6238 else if (typ1->v_type != typ2->v_type 6239 || (type != TYPE_EQUAL && type != TYPE_NEQUAL)) 6240 { 6241 if (typ1->v_type != typ2->v_type) 6242 emsg(_("E735: Can only compare Dictionary with Dictionary")); 6243 else 6244 emsg(_("E736: Invalid operation for Dictionary")); 6245 clear_tv(typ1); 6246 return FAIL; 6247 } 6248 else 6249 { 6250 /* Compare two Dictionaries for being equal or unequal. */ 6251 n1 = dict_equal(typ1->vval.v_dict, typ2->vval.v_dict, 6252 ic, FALSE); 6253 if (type == TYPE_NEQUAL) 6254 n1 = !n1; 6255 } 6256 } 6257 6258 else if (typ1->v_type == VAR_FUNC || typ2->v_type == VAR_FUNC 6259 || typ1->v_type == VAR_PARTIAL || typ2->v_type == VAR_PARTIAL) 6260 { 6261 if (type != TYPE_EQUAL && type != TYPE_NEQUAL) 6262 { 6263 emsg(_("E694: Invalid operation for Funcrefs")); 6264 clear_tv(typ1); 6265 return FAIL; 6266 } 6267 if ((typ1->v_type == VAR_PARTIAL 6268 && typ1->vval.v_partial == NULL) 6269 || (typ2->v_type == VAR_PARTIAL 6270 && typ2->vval.v_partial == NULL)) 6271 /* when a partial is NULL assume not equal */ 6272 n1 = FALSE; 6273 else if (type_is) 6274 { 6275 if (typ1->v_type == VAR_FUNC && typ2->v_type == VAR_FUNC) 6276 /* strings are considered the same if their value is 6277 * the same */ 6278 n1 = tv_equal(typ1, typ2, ic, FALSE); 6279 else if (typ1->v_type == VAR_PARTIAL 6280 && typ2->v_type == VAR_PARTIAL) 6281 n1 = (typ1->vval.v_partial == typ2->vval.v_partial); 6282 else 6283 n1 = FALSE; 6284 } 6285 else 6286 n1 = tv_equal(typ1, typ2, ic, FALSE); 6287 if (type == TYPE_NEQUAL) 6288 n1 = !n1; 6289 } 6290 6291 #ifdef FEAT_FLOAT 6292 /* 6293 * If one of the two variables is a float, compare as a float. 6294 * When using "=~" or "!~", always compare as string. 6295 */ 6296 else if ((typ1->v_type == VAR_FLOAT || typ2->v_type == VAR_FLOAT) 6297 && type != TYPE_MATCH && type != TYPE_NOMATCH) 6298 { 6299 float_T f1, f2; 6300 6301 f1 = tv_get_float(typ1); 6302 f2 = tv_get_float(typ2); 6303 n1 = FALSE; 6304 switch (type) 6305 { 6306 case TYPE_EQUAL: n1 = (f1 == f2); break; 6307 case TYPE_NEQUAL: n1 = (f1 != f2); break; 6308 case TYPE_GREATER: n1 = (f1 > f2); break; 6309 case TYPE_GEQUAL: n1 = (f1 >= f2); break; 6310 case TYPE_SMALLER: n1 = (f1 < f2); break; 6311 case TYPE_SEQUAL: n1 = (f1 <= f2); break; 6312 case TYPE_UNKNOWN: 6313 case TYPE_MATCH: 6314 case TYPE_NOMATCH: break; /* avoid gcc warning */ 6315 } 6316 } 6317 #endif 6318 6319 /* 6320 * If one of the two variables is a number, compare as a number. 6321 * When using "=~" or "!~", always compare as string. 6322 */ 6323 else if ((typ1->v_type == VAR_NUMBER || typ2->v_type == VAR_NUMBER) 6324 && type != TYPE_MATCH && type != TYPE_NOMATCH) 6325 { 6326 n1 = tv_get_number(typ1); 6327 n2 = tv_get_number(typ2); 6328 switch (type) 6329 { 6330 case TYPE_EQUAL: n1 = (n1 == n2); break; 6331 case TYPE_NEQUAL: n1 = (n1 != n2); break; 6332 case TYPE_GREATER: n1 = (n1 > n2); break; 6333 case TYPE_GEQUAL: n1 = (n1 >= n2); break; 6334 case TYPE_SMALLER: n1 = (n1 < n2); break; 6335 case TYPE_SEQUAL: n1 = (n1 <= n2); break; 6336 case TYPE_UNKNOWN: 6337 case TYPE_MATCH: 6338 case TYPE_NOMATCH: break; /* avoid gcc warning */ 6339 } 6340 } 6341 else 6342 { 6343 s1 = tv_get_string_buf(typ1, buf1); 6344 s2 = tv_get_string_buf(typ2, buf2); 6345 if (type != TYPE_MATCH && type != TYPE_NOMATCH) 6346 i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2); 6347 else 6348 i = 0; 6349 n1 = FALSE; 6350 switch (type) 6351 { 6352 case TYPE_EQUAL: n1 = (i == 0); break; 6353 case TYPE_NEQUAL: n1 = (i != 0); break; 6354 case TYPE_GREATER: n1 = (i > 0); break; 6355 case TYPE_GEQUAL: n1 = (i >= 0); break; 6356 case TYPE_SMALLER: n1 = (i < 0); break; 6357 case TYPE_SEQUAL: n1 = (i <= 0); break; 6358 6359 case TYPE_MATCH: 6360 case TYPE_NOMATCH: 6361 n1 = pattern_match(s2, s1, ic); 6362 if (type == TYPE_NOMATCH) 6363 n1 = !n1; 6364 break; 6365 6366 case TYPE_UNKNOWN: break; /* avoid gcc warning */ 6367 } 6368 } 6369 clear_tv(typ1); 6370 typ1->v_type = VAR_NUMBER; 6371 typ1->vval.v_number = n1; 6372 6373 return OK; 6374 } 6375 6376 char_u * 6377 typval_tostring(typval_T *arg) 6378 { 6379 char_u *tofree; 6380 char_u numbuf[NUMBUFLEN]; 6381 char_u *ret = NULL; 6382 6383 if (arg == NULL) 6384 return vim_strsave((char_u *)"(does not exist)"); 6385 ret = tv2string(arg, &tofree, numbuf, 0); 6386 /* Make a copy if we have a value but it's not in allocated memory. */ 6387 if (ret != NULL && tofree == NULL) 6388 ret = vim_strsave(ret); 6389 return ret; 6390 } 6391 6392 #endif // FEAT_EVAL 6393 6394 /* 6395 * Perform a substitution on "str" with pattern "pat" and substitute "sub". 6396 * When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL. 6397 * "flags" can be "g" to do a global substitute. 6398 * Returns an allocated string, NULL for error. 6399 */ 6400 char_u * 6401 do_string_sub( 6402 char_u *str, 6403 char_u *pat, 6404 char_u *sub, 6405 typval_T *expr, 6406 char_u *flags) 6407 { 6408 int sublen; 6409 regmatch_T regmatch; 6410 int i; 6411 int do_all; 6412 char_u *tail; 6413 char_u *end; 6414 garray_T ga; 6415 char_u *ret; 6416 char_u *save_cpo; 6417 char_u *zero_width = NULL; 6418 6419 /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */ 6420 save_cpo = p_cpo; 6421 p_cpo = empty_option; 6422 6423 ga_init2(&ga, 1, 200); 6424 6425 do_all = (flags[0] == 'g'); 6426 6427 regmatch.rm_ic = p_ic; 6428 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); 6429 if (regmatch.regprog != NULL) 6430 { 6431 tail = str; 6432 end = str + STRLEN(str); 6433 while (vim_regexec_nl(®match, str, (colnr_T)(tail - str))) 6434 { 6435 /* Skip empty match except for first match. */ 6436 if (regmatch.startp[0] == regmatch.endp[0]) 6437 { 6438 if (zero_width == regmatch.startp[0]) 6439 { 6440 /* avoid getting stuck on a match with an empty string */ 6441 i = MB_PTR2LEN(tail); 6442 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, 6443 (size_t)i); 6444 ga.ga_len += i; 6445 tail += i; 6446 continue; 6447 } 6448 zero_width = regmatch.startp[0]; 6449 } 6450 6451 /* 6452 * Get some space for a temporary buffer to do the substitution 6453 * into. It will contain: 6454 * - The text up to where the match is. 6455 * - The substituted text. 6456 * - The text after the match. 6457 */ 6458 sublen = vim_regsub(®match, sub, expr, tail, FALSE, TRUE, FALSE); 6459 if (ga_grow(&ga, (int)((end - tail) + sublen - 6460 (regmatch.endp[0] - regmatch.startp[0]))) == FAIL) 6461 { 6462 ga_clear(&ga); 6463 break; 6464 } 6465 6466 /* copy the text up to where the match is */ 6467 i = (int)(regmatch.startp[0] - tail); 6468 mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i); 6469 /* add the substituted text */ 6470 (void)vim_regsub(®match, sub, expr, (char_u *)ga.ga_data 6471 + ga.ga_len + i, TRUE, TRUE, FALSE); 6472 ga.ga_len += i + sublen - 1; 6473 tail = regmatch.endp[0]; 6474 if (*tail == NUL) 6475 break; 6476 if (!do_all) 6477 break; 6478 } 6479 6480 if (ga.ga_data != NULL) 6481 STRCPY((char *)ga.ga_data + ga.ga_len, tail); 6482 6483 vim_regfree(regmatch.regprog); 6484 } 6485 6486 ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data); 6487 ga_clear(&ga); 6488 if (p_cpo == empty_option) 6489 p_cpo = save_cpo; 6490 else 6491 /* Darn, evaluating {sub} expression or {expr} changed the value. */ 6492 free_string_option(save_cpo); 6493 6494 return ret; 6495 } 6496