Mercurial > vim
view src/userfunc.c @ 20907:4eeda7139133 v8.2.1005
patch 8.2.1005: Vim9: using TRUE/FALSE/MAYBE for ctx_skip is confusing
Commit: https://github.com/vim/vim/commit/9b68c82b7ca768100f3eb4223d100c62c5429e53
Author: Bram Moolenaar <Bram@vim.org>
Date: Thu Jun 18 19:31:08 2020 +0200
patch 8.2.1005: Vim9: using TRUE/FALSE/MAYBE for ctx_skip is confusing
Problem: Vim9: using TRUE/FALSE/MAYBE for ctx_skip is confusing.
Solution: Use an enum value.
author | Bram Moolenaar <Bram@vim.org> |
---|---|
date | Thu, 18 Jun 2020 19:45:03 +0200 |
parents | 9064044fd4f6 |
children | 1693ca876049 |
line wrap: on
line source
/* vi:set ts=8 sts=4 sw=4 noet: * * VIM - Vi IMproved by Bram Moolenaar * * Do ":help uganda" in Vim to read copying and usage conditions. * Do ":help credits" in Vim to see a list of people who contributed. * See README.txt for an overview of the Vim source code. */ /* * userfunc.c: User defined function support */ #include "vim.h" #if defined(FEAT_EVAL) || defined(PROTO) /* * All user-defined functions are found in this hashtable. */ static hashtab_T func_hashtab; // Used by get_func_tv() static garray_T funcargs = GA_EMPTY; // pointer to funccal for currently active function static funccall_T *current_funccal = NULL; // Pointer to list of previously used funccal, still around because some // item in it is still being used. static funccall_T *previous_funccal = NULL; static char *e_funcexts = N_("E122: Function %s already exists, add ! to replace it"); static char *e_funcdict = N_("E717: Dictionary entry already exists"); static char *e_funcref = N_("E718: Funcref required"); static char *e_nofunc = N_("E130: Unknown function: %s"); static void funccal_unref(funccall_T *fc, ufunc_T *fp, int force); void func_init() { hash_init(&func_hashtab); } /* * Return the function hash table */ hashtab_T * func_tbl_get(void) { return &func_hashtab; } /* * Get one function argument. * If "argtypes" is not NULL also get the type: "arg: type". * Return a pointer to after the type. * When something is wrong return "arg". */ static char_u * one_function_arg(char_u *arg, garray_T *newargs, garray_T *argtypes, int skip) { char_u *p = arg; char_u *arg_copy = NULL; while (ASCII_ISALNUM(*p) || *p == '_') ++p; if (arg == p || isdigit(*arg) || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0) || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0)) { if (!skip) semsg(_("E125: Illegal argument: %s"), arg); return arg; } if (newargs != NULL && ga_grow(newargs, 1) == FAIL) return arg; if (newargs != NULL) { int c; int i; c = *p; *p = NUL; arg_copy = vim_strsave(arg); if (arg_copy == NULL) { *p = c; return arg; } // Check for duplicate argument name. for (i = 0; i < newargs->ga_len; ++i) if (STRCMP(((char_u **)(newargs->ga_data))[i], arg_copy) == 0) { semsg(_("E853: Duplicate argument name: %s"), arg_copy); vim_free(arg_copy); return arg; } ((char_u **)(newargs->ga_data))[newargs->ga_len] = arg_copy; newargs->ga_len++; *p = c; } // get any type from "arg: type" if (argtypes != NULL && ga_grow(argtypes, 1) == OK) { char_u *type = NULL; if (VIM_ISWHITE(*p) && *skipwhite(p) == ':') { semsg(_("E1059: No white space allowed before colon: %s"), arg_copy == NULL ? arg : arg_copy); p = skipwhite(p); } if (*p == ':') { ++p; if (!VIM_ISWHITE(*p)) { semsg(_(e_white_after), ":"); return arg; } type = skipwhite(p); p = skip_type(type); type = vim_strnsave(type, p - type); } else if (*skipwhite(p) != '=') { semsg(_("E1077: Missing argument type for %s"), arg_copy == NULL ? arg : arg_copy); return arg; } ((char_u **)argtypes->ga_data)[argtypes->ga_len++] = type; } return p; } /* * Get function arguments. */ int get_function_args( char_u **argp, char_u endchar, garray_T *newargs, garray_T *argtypes, // NULL unless using :def int *varargs, garray_T *default_args, int skip, exarg_T *eap, char_u **line_to_free) { int mustend = FALSE; char_u *arg = *argp; char_u *p = arg; int c; int any_default = FALSE; char_u *expr; char_u *whitep = arg; if (newargs != NULL) ga_init2(newargs, (int)sizeof(char_u *), 3); if (argtypes != NULL) ga_init2(argtypes, (int)sizeof(char_u *), 3); if (default_args != NULL) ga_init2(default_args, (int)sizeof(char_u *), 3); if (varargs != NULL) *varargs = FALSE; /* * Isolate the arguments: "arg1, arg2, ...)" */ while (*p != endchar) { while (eap != NULL && eap->getline != NULL && (*p == NUL || (VIM_ISWHITE(*whitep) && *p == '#'))) { char_u *theline; // End of the line, get the next one. theline = eap->getline(':', eap->cookie, 0, TRUE); if (theline == NULL) break; vim_free(*line_to_free); *line_to_free = theline; whitep = (char_u *)" "; p = skipwhite(theline); } if (mustend && *p != endchar) { if (!skip) semsg(_(e_invarg2), *argp); break; } if (*p == endchar) break; if (p[0] == '.' && p[1] == '.' && p[2] == '.') { if (varargs != NULL) *varargs = TRUE; p += 3; mustend = TRUE; if (argtypes != NULL) { // ...name: list<type> if (!ASCII_ISALPHA(*p)) { emsg(_("E1055: Missing name after ...")); break; } arg = p; p = one_function_arg(p, newargs, argtypes, skip); if (p == arg) break; } } else { arg = p; p = one_function_arg(p, newargs, argtypes, skip); if (p == arg) break; if (*skipwhite(p) == '=' && default_args != NULL) { typval_T rettv; // find the end of the expression (doesn't evaluate it) any_default = TRUE; p = skipwhite(p) + 1; whitep = p; p = skipwhite(p); expr = p; if (eval1(&p, &rettv, 0) != FAIL) { if (ga_grow(default_args, 1) == FAIL) goto err_ret; // trim trailing whitespace while (p > expr && VIM_ISWHITE(p[-1])) p--; c = *p; *p = NUL; expr = vim_strsave(expr); if (expr == NULL) { *p = c; goto err_ret; } ((char_u **)(default_args->ga_data)) [default_args->ga_len] = expr; default_args->ga_len++; *p = c; } else mustend = TRUE; } else if (any_default) { emsg(_("E989: Non-default argument follows default argument")); mustend = TRUE; } if (*p == ',') ++p; else mustend = TRUE; } whitep = p; p = skipwhite(p); } if (*p != endchar) goto err_ret; ++p; // skip "endchar" *argp = p; return OK; err_ret: if (newargs != NULL) ga_clear_strings(newargs); if (default_args != NULL) ga_clear_strings(default_args); return FAIL; } /* * Register function "fp" as using "current_funccal" as its scope. */ static int register_closure(ufunc_T *fp) { if (fp->uf_scoped == current_funccal) // no change return OK; funccal_unref(fp->uf_scoped, fp, FALSE); fp->uf_scoped = current_funccal; current_funccal->fc_refcount++; if (ga_grow(¤t_funccal->fc_funcs, 1) == FAIL) return FAIL; ((ufunc_T **)current_funccal->fc_funcs.ga_data) [current_funccal->fc_funcs.ga_len++] = fp; return OK; } static void set_ufunc_name(ufunc_T *fp, char_u *name) { STRCPY(fp->uf_name, name); if (name[0] == K_SPECIAL) { fp->uf_name_exp = alloc(STRLEN(name) + 3); if (fp->uf_name_exp != NULL) { STRCPY(fp->uf_name_exp, "<SNR>"); STRCAT(fp->uf_name_exp, fp->uf_name + 3); } } } /* * Get a name for a lambda. Returned in static memory. */ char_u * get_lambda_name(void) { static char_u name[30]; static int lambda_no = 0; sprintf((char*)name, "<lambda>%d", ++lambda_no); return name; } /* * Parse a lambda expression and get a Funcref from "*arg". * Return OK or FAIL. Returns NOTDONE for dict or {expr}. */ int get_lambda_tv(char_u **arg, typval_T *rettv, int evaluate) { garray_T newargs; garray_T newlines; garray_T *pnewargs; ufunc_T *fp = NULL; partial_T *pt = NULL; int varargs; int ret; char_u *start = skipwhite(*arg + 1); char_u *s, *e; int *old_eval_lavars = eval_lavars_used; int eval_lavars = FALSE; ga_init(&newargs); ga_init(&newlines); // First, check if this is a lambda expression. "->" must exist. ret = get_function_args(&start, '-', NULL, NULL, NULL, NULL, TRUE, NULL, NULL); if (ret == FAIL || *start != '>') return NOTDONE; // Parse the arguments again. if (evaluate) pnewargs = &newargs; else pnewargs = NULL; *arg = skipwhite(*arg + 1); // TODO: argument types ret = get_function_args(arg, '-', pnewargs, NULL, &varargs, NULL, FALSE, NULL, NULL); if (ret == FAIL || **arg != '>') goto errret; // Set up a flag for checking local variables and arguments. if (evaluate) eval_lavars_used = &eval_lavars; // Get the start and the end of the expression. *arg = skipwhite(*arg + 1); s = *arg; ret = skip_expr(arg); if (ret == FAIL) goto errret; e = *arg; *arg = skipwhite(*arg); if (**arg != '}') { semsg(_("E451: Expected }: %s"), *arg); goto errret; } ++*arg; if (evaluate) { int len, flags = 0; char_u *p; char_u *name = get_lambda_name(); fp = alloc_clear(offsetof(ufunc_T, uf_name) + STRLEN(name) + 1); if (fp == NULL) goto errret; fp->uf_dfunc_idx = UF_NOT_COMPILED; pt = ALLOC_CLEAR_ONE(partial_T); if (pt == NULL) goto errret; ga_init2(&newlines, (int)sizeof(char_u *), 1); if (ga_grow(&newlines, 1) == FAIL) goto errret; // Add "return " before the expression. len = 7 + e - s + 1; p = alloc(len); if (p == NULL) goto errret; ((char_u **)(newlines.ga_data))[newlines.ga_len++] = p; STRCPY(p, "return "); vim_strncpy(p + 7, s, e - s); if (strstr((char *)p + 7, "a:") == NULL) // No a: variables are used for sure. flags |= FC_NOARGS; fp->uf_refcount = 1; set_ufunc_name(fp, name); hash_add(&func_hashtab, UF2HIKEY(fp)); fp->uf_args = newargs; ga_init(&fp->uf_def_args); fp->uf_lines = newlines; if (current_funccal != NULL && eval_lavars) { flags |= FC_CLOSURE; if (register_closure(fp) == FAIL) goto errret; } else fp->uf_scoped = NULL; #ifdef FEAT_PROFILE if (prof_def_func()) func_do_profile(fp); #endif if (sandbox) flags |= FC_SANDBOX; // can be called with more args than uf_args.ga_len fp->uf_varargs = TRUE; fp->uf_flags = flags; fp->uf_calls = 0; fp->uf_script_ctx = current_sctx; fp->uf_script_ctx.sc_lnum += SOURCING_LNUM - newlines.ga_len; pt->pt_func = fp; pt->pt_refcount = 1; rettv->vval.v_partial = pt; rettv->v_type = VAR_PARTIAL; } eval_lavars_used = old_eval_lavars; return OK; errret: ga_clear_strings(&newargs); ga_clear_strings(&newlines); vim_free(fp); vim_free(pt); eval_lavars_used = old_eval_lavars; return FAIL; } /* * Check if "name" is a variable of type VAR_FUNC. If so, return the function * name it contains, otherwise return "name". * If "partialp" is not NULL, and "name" is of type VAR_PARTIAL also set * "partialp". */ char_u * deref_func_name(char_u *name, int *lenp, partial_T **partialp, int no_autoload) { dictitem_T *v; int cc; char_u *s; if (partialp != NULL) *partialp = NULL; cc = name[*lenp]; name[*lenp] = NUL; v = find_var(name, NULL, no_autoload); name[*lenp] = cc; if (v != NULL && v->di_tv.v_type == VAR_FUNC) { if (v->di_tv.vval.v_string == NULL) { *lenp = 0; return (char_u *)""; // just in case } s = v->di_tv.vval.v_string; *lenp = (int)STRLEN(s); return s; } if (v != NULL && v->di_tv.v_type == VAR_PARTIAL) { partial_T *pt = v->di_tv.vval.v_partial; if (pt == NULL) { *lenp = 0; return (char_u *)""; // just in case } if (partialp != NULL) *partialp = pt; s = partial_name(pt); *lenp = (int)STRLEN(s); return s; } return name; } /* * Give an error message with a function name. Handle <SNR> things. * "ermsg" is to be passed without translation, use N_() instead of _(). */ void emsg_funcname(char *ermsg, char_u *name) { char_u *p; if (*name == K_SPECIAL) p = concat_str((char_u *)"<SNR>", name + 3); else p = name; semsg(_(ermsg), p); if (p != name) vim_free(p); } /* * Allocate a variable for the result of a function. * Return OK or FAIL. */ int get_func_tv( char_u *name, // name of the function int len, // length of "name" or -1 to use strlen() typval_T *rettv, char_u **arg, // argument, pointing to the '(' funcexe_T *funcexe) // various values { char_u *argp; int ret = OK; typval_T argvars[MAX_FUNC_ARGS + 1]; // vars for arguments int argcount = 0; // number of arguments found /* * Get the arguments. */ argp = *arg; while (argcount < MAX_FUNC_ARGS - (funcexe->partial == NULL ? 0 : funcexe->partial->pt_argc)) { argp = skipwhite(argp + 1); // skip the '(' or ',' if (*argp == ')' || *argp == ',' || *argp == NUL) break; if (eval1(&argp, &argvars[argcount], funcexe->evaluate ? EVAL_EVALUATE : 0) == FAIL) { ret = FAIL; break; } ++argcount; if (*argp != ',') break; } if (*argp == ')') ++argp; else ret = FAIL; if (ret == OK) { int i = 0; if (get_vim_var_nr(VV_TESTING)) { // Prepare for calling test_garbagecollect_now(), need to know // what variables are used on the call stack. if (funcargs.ga_itemsize == 0) ga_init2(&funcargs, (int)sizeof(typval_T *), 50); for (i = 0; i < argcount; ++i) if (ga_grow(&funcargs, 1) == OK) ((typval_T **)funcargs.ga_data)[funcargs.ga_len++] = &argvars[i]; } ret = call_func(name, len, rettv, argcount, argvars, funcexe); funcargs.ga_len -= i; } else if (!aborting()) { if (argcount == MAX_FUNC_ARGS) emsg_funcname(N_("E740: Too many arguments for function %s"), name); else emsg_funcname(N_("E116: Invalid arguments for function %s"), name); } while (--argcount >= 0) clear_tv(&argvars[argcount]); *arg = skipwhite(argp); return ret; } /* * Return TRUE if "p" starts with "<SID>" or "s:". * Only works if eval_fname_script() returned non-zero for "p"! */ static int eval_fname_sid(char_u *p) { return (*p == 's' || TOUPPER_ASC(p[2]) == 'I'); } /* * In a script change <SID>name() and s:name() to K_SNR 123_name(). * Change <SNR>123_name() to K_SNR 123_name(). * Use "fname_buf[FLEN_FIXED + 1]" when it fits, otherwise allocate memory * (slow). */ char_u * fname_trans_sid(char_u *name, char_u *fname_buf, char_u **tofree, int *error) { int llen; char_u *fname; int i; llen = eval_fname_script(name); if (llen > 0) { fname_buf[0] = K_SPECIAL; fname_buf[1] = KS_EXTRA; fname_buf[2] = (int)KE_SNR; i = 3; if (eval_fname_sid(name)) // "<SID>" or "s:" { if (current_sctx.sc_sid <= 0) *error = FCERR_SCRIPT; else { sprintf((char *)fname_buf + 3, "%ld_", (long)current_sctx.sc_sid); i = (int)STRLEN(fname_buf); } } if (i + STRLEN(name + llen) < FLEN_FIXED) { STRCPY(fname_buf + i, name + llen); fname = fname_buf; } else { fname = alloc(i + STRLEN(name + llen) + 1); if (fname == NULL) *error = FCERR_OTHER; else { *tofree = fname; mch_memmove(fname, fname_buf, (size_t)i); STRCPY(fname + i, name + llen); } } } else fname = name; return fname; } /* * Find a function "name" in script "sid". */ static ufunc_T * find_func_with_sid(char_u *name, int sid) { hashitem_T *hi; char_u buffer[200]; buffer[0] = K_SPECIAL; buffer[1] = KS_EXTRA; buffer[2] = (int)KE_SNR; vim_snprintf((char *)buffer + 3, sizeof(buffer) - 3, "%ld_%s", (long)sid, name); hi = hash_find(&func_hashtab, buffer); if (!HASHITEM_EMPTY(hi)) return HI2UF(hi); return NULL; } /* * Find a function by name, return pointer to it in ufuncs. * When "is_global" is true don't find script-local or imported functions. * Return NULL for unknown function. */ static ufunc_T * find_func_even_dead(char_u *name, int is_global, cctx_T *cctx) { hashitem_T *hi; ufunc_T *func; imported_T *imported; if (!is_global) { char_u *after_script = NULL; if (in_vim9script()) { // Find script-local function before global one. func = find_func_with_sid(name, current_sctx.sc_sid); if (func != NULL) return func; } if (!in_vim9script() && name[0] == K_SPECIAL && name[1] == KS_EXTRA && name[2] == KE_SNR) { long sid; // Caller changes s: to <SNR>99_name. after_script = name + 3; sid = getdigits(&after_script); if (sid == current_sctx.sc_sid && *after_script == '_') ++after_script; else after_script = NULL; } if (in_vim9script() || after_script != NULL) { // Find imported function before global one. imported = find_imported( after_script == NULL ? name : after_script, 0, cctx); if (imported != NULL && imported->imp_funcname != NULL) { hi = hash_find(&func_hashtab, imported->imp_funcname); if (!HASHITEM_EMPTY(hi)) return HI2UF(hi); } } } hi = hash_find(&func_hashtab, STRNCMP(name, "g:", 2) == 0 ? name + 2 : name); if (!HASHITEM_EMPTY(hi)) return HI2UF(hi); return NULL; } /* * Find a function by name, return pointer to it in ufuncs. * "cctx" is passed in a :def function to find imported functions. * Return NULL for unknown or dead function. */ ufunc_T * find_func(char_u *name, int is_global, cctx_T *cctx) { ufunc_T *fp = find_func_even_dead(name, is_global, cctx); if (fp != NULL && (fp->uf_flags & FC_DEAD) == 0) return fp; return NULL; } /* * Copy the function name of "fp" to buffer "buf". * "buf" must be able to hold the function name plus three bytes. * Takes care of script-local function names. */ static void cat_func_name(char_u *buf, ufunc_T *fp) { if (fp->uf_name[0] == K_SPECIAL) { STRCPY(buf, "<SNR>"); STRCAT(buf, fp->uf_name + 3); } else STRCPY(buf, fp->uf_name); } /* * Add a number variable "name" to dict "dp" with value "nr". */ static void add_nr_var( dict_T *dp, dictitem_T *v, char *name, varnumber_T nr) { STRCPY(v->di_key, name); v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; hash_add(&dp->dv_hashtab, DI2HIKEY(v)); v->di_tv.v_type = VAR_NUMBER; v->di_tv.v_lock = VAR_FIXED; v->di_tv.vval.v_number = nr; } /* * Free "fc". */ static void free_funccal(funccall_T *fc) { int i; for (i = 0; i < fc->fc_funcs.ga_len; ++i) { ufunc_T *fp = ((ufunc_T **)(fc->fc_funcs.ga_data))[i]; // When garbage collecting a funccall_T may be freed before the // function that references it, clear its uf_scoped field. // The function may have been redefined and point to another // funccall_T, don't clear it then. if (fp != NULL && fp->uf_scoped == fc) fp->uf_scoped = NULL; } ga_clear(&fc->fc_funcs); func_ptr_unref(fc->func); vim_free(fc); } /* * Free "fc" and what it contains. * Can be called only when "fc" is kept beyond the period of it called, * i.e. after cleanup_function_call(fc). */ static void free_funccal_contents(funccall_T *fc) { listitem_T *li; // Free all l: variables. vars_clear(&fc->l_vars.dv_hashtab); // Free all a: variables. vars_clear(&fc->l_avars.dv_hashtab); // Free the a:000 variables. FOR_ALL_LIST_ITEMS(&fc->l_varlist, li) clear_tv(&li->li_tv); free_funccal(fc); } /* * Handle the last part of returning from a function: free the local hashtable. * Unless it is still in use by a closure. */ static void cleanup_function_call(funccall_T *fc) { int may_free_fc = fc->fc_refcount <= 0; int free_fc = TRUE; current_funccal = fc->caller; // Free all l: variables if not referred. if (may_free_fc && fc->l_vars.dv_refcount == DO_NOT_FREE_CNT) vars_clear(&fc->l_vars.dv_hashtab); else free_fc = FALSE; // If the a:000 list and the l: and a: dicts are not referenced and // there is no closure using it, we can free the funccall_T and what's // in it. if (may_free_fc && fc->l_avars.dv_refcount == DO_NOT_FREE_CNT) vars_clear_ext(&fc->l_avars.dv_hashtab, FALSE); else { int todo; hashitem_T *hi; dictitem_T *di; free_fc = FALSE; // Make a copy of the a: variables, since we didn't do that above. todo = (int)fc->l_avars.dv_hashtab.ht_used; for (hi = fc->l_avars.dv_hashtab.ht_array; todo > 0; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; di = HI2DI(hi); copy_tv(&di->di_tv, &di->di_tv); } } } if (may_free_fc && fc->l_varlist.lv_refcount == DO_NOT_FREE_CNT) fc->l_varlist.lv_first = NULL; else { listitem_T *li; free_fc = FALSE; // Make a copy of the a:000 items, since we didn't do that above. FOR_ALL_LIST_ITEMS(&fc->l_varlist, li) copy_tv(&li->li_tv, &li->li_tv); } if (free_fc) free_funccal(fc); else { static int made_copy = 0; // "fc" is still in use. This can happen when returning "a:000", // assigning "l:" to a global variable or defining a closure. // Link "fc" in the list for garbage collection later. fc->caller = previous_funccal; previous_funccal = fc; if (want_garbage_collect) // If garbage collector is ready, clear count. made_copy = 0; else if (++made_copy >= (int)((4096 * 1024) / sizeof(*fc))) { // We have made a lot of copies, worth 4 Mbyte. This can happen // when repetitively calling a function that creates a reference to // itself somehow. Call the garbage collector soon to avoid using // too much memory. made_copy = 0; want_garbage_collect = TRUE; } } } /* * Unreference "fc": decrement the reference count and free it when it * becomes zero. "fp" is detached from "fc". * When "force" is TRUE we are exiting. */ static void funccal_unref(funccall_T *fc, ufunc_T *fp, int force) { funccall_T **pfc; int i; if (fc == NULL) return; if (--fc->fc_refcount <= 0 && (force || ( fc->l_varlist.lv_refcount == DO_NOT_FREE_CNT && fc->l_vars.dv_refcount == DO_NOT_FREE_CNT && fc->l_avars.dv_refcount == DO_NOT_FREE_CNT))) for (pfc = &previous_funccal; *pfc != NULL; pfc = &(*pfc)->caller) { if (fc == *pfc) { *pfc = fc->caller; free_funccal_contents(fc); return; } } for (i = 0; i < fc->fc_funcs.ga_len; ++i) if (((ufunc_T **)(fc->fc_funcs.ga_data))[i] == fp) ((ufunc_T **)(fc->fc_funcs.ga_data))[i] = NULL; } /* * Remove the function from the function hashtable. If the function was * deleted while it still has references this was already done. * Return TRUE if the entry was deleted, FALSE if it wasn't found. */ static int func_remove(ufunc_T *fp) { hashitem_T *hi; // Return if it was already virtually deleted. if (fp->uf_flags & FC_DEAD) return FALSE; hi = hash_find(&func_hashtab, UF2HIKEY(fp)); if (!HASHITEM_EMPTY(hi)) { // When there is a def-function index do not actually remove the // function, so we can find the index when defining the function again. if (fp->uf_dfunc_idx >= 0) fp->uf_flags |= FC_DEAD; else hash_remove(&func_hashtab, hi); return TRUE; } return FALSE; } static void func_clear_items(ufunc_T *fp) { ga_clear_strings(&(fp->uf_args)); ga_clear_strings(&(fp->uf_def_args)); ga_clear_strings(&(fp->uf_lines)); VIM_CLEAR(fp->uf_name_exp); VIM_CLEAR(fp->uf_arg_types); VIM_CLEAR(fp->uf_def_arg_idx); VIM_CLEAR(fp->uf_va_name); while (fp->uf_type_list.ga_len > 0) vim_free(((type_T **)fp->uf_type_list.ga_data) [--fp->uf_type_list.ga_len]); ga_clear(&fp->uf_type_list); #ifdef FEAT_PROFILE VIM_CLEAR(fp->uf_tml_count); VIM_CLEAR(fp->uf_tml_total); VIM_CLEAR(fp->uf_tml_self); #endif } /* * Free all things that a function contains. Does not free the function * itself, use func_free() for that. * When "force" is TRUE we are exiting. */ static void func_clear(ufunc_T *fp, int force) { if (fp->uf_cleared) return; fp->uf_cleared = TRUE; // clear this function func_clear_items(fp); funccal_unref(fp->uf_scoped, fp, force); delete_def_function(fp); } /* * Free a function and remove it from the list of functions. Does not free * what a function contains, call func_clear() first. * When "force" is TRUE we are exiting. */ static void func_free(ufunc_T *fp, int force) { // Only remove it when not done already, otherwise we would remove a newer // version of the function with the same name. if ((fp->uf_flags & (FC_DELETED | FC_REMOVED)) == 0) func_remove(fp); if ((fp->uf_flags & FC_DEAD) == 0 || force) vim_free(fp); } /* * Free all things that a function contains and free the function itself. * When "force" is TRUE we are exiting. */ static void func_clear_free(ufunc_T *fp, int force) { func_clear(fp, force); func_free(fp, force); } /* * Call a user function. */ static void call_user_func( ufunc_T *fp, // pointer to function int argcount, // nr of args typval_T *argvars, // arguments typval_T *rettv, // return value funcexe_T *funcexe, // context dict_T *selfdict) // Dictionary for "self" { sctx_T save_current_sctx; int using_sandbox = FALSE; funccall_T *fc; int save_did_emsg; int default_arg_err = FALSE; static int depth = 0; dictitem_T *v; int fixvar_idx = 0; // index in fixvar[] int i; int ai; int islambda = FALSE; char_u numbuf[NUMBUFLEN]; char_u *name; #ifdef FEAT_PROFILE proftime_T wait_start; proftime_T call_start; int started_profiling = FALSE; #endif ESTACK_CHECK_DECLARATION // If depth of calling is getting too high, don't execute the function if (depth >= p_mfd) { emsg(_("E132: Function call depth is higher than 'maxfuncdepth'")); rettv->v_type = VAR_NUMBER; rettv->vval.v_number = -1; return; } ++depth; line_breakcheck(); // check for CTRL-C hit fc = ALLOC_CLEAR_ONE(funccall_T); if (fc == NULL) return; fc->caller = current_funccal; current_funccal = fc; fc->func = fp; fc->rettv = rettv; fc->level = ex_nesting_level; // Check if this function has a breakpoint. fc->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0); fc->dbg_tick = debug_tick; // Set up fields for closure. ga_init2(&fc->fc_funcs, sizeof(ufunc_T *), 1); func_ptr_ref(fp); if (fp->uf_dfunc_idx != UF_NOT_COMPILED) { estack_push_ufunc(fp, 1); save_current_sctx = current_sctx; current_sctx = fp->uf_script_ctx; // Execute the function, possibly compiling it first. call_def_function(fp, argcount, argvars, funcexe->partial, rettv); --depth; current_funccal = fc->caller; estack_pop(); current_sctx = save_current_sctx; free_funccal(fc); return; } if (STRNCMP(fp->uf_name, "<lambda>", 8) == 0) islambda = TRUE; /* * Note about using fc->fixvar[]: This is an array of FIXVAR_CNT variables * with names up to VAR_SHORT_LEN long. This avoids having to alloc/free * each argument variable and saves a lot of time. */ /* * Init l: variables. */ init_var_dict(&fc->l_vars, &fc->l_vars_var, VAR_DEF_SCOPE); if (selfdict != NULL) { // Set l:self to "selfdict". Use "name" to avoid a warning from // some compiler that checks the destination size. v = &fc->fixvar[fixvar_idx++].var; name = v->di_key; STRCPY(name, "self"); v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; hash_add(&fc->l_vars.dv_hashtab, DI2HIKEY(v)); v->di_tv.v_type = VAR_DICT; v->di_tv.v_lock = 0; v->di_tv.vval.v_dict = selfdict; ++selfdict->dv_refcount; } /* * Init a: variables, unless none found (in lambda). * Set a:0 to "argcount" less number of named arguments, if >= 0. * Set a:000 to a list with room for the "..." arguments. */ init_var_dict(&fc->l_avars, &fc->l_avars_var, VAR_SCOPE); if ((fp->uf_flags & FC_NOARGS) == 0) add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "0", (varnumber_T)(argcount >= fp->uf_args.ga_len ? argcount - fp->uf_args.ga_len : 0)); fc->l_avars.dv_lock = VAR_FIXED; if ((fp->uf_flags & FC_NOARGS) == 0) { // Use "name" to avoid a warning from some compiler that checks the // destination size. v = &fc->fixvar[fixvar_idx++].var; name = v->di_key; STRCPY(name, "000"); v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; hash_add(&fc->l_avars.dv_hashtab, DI2HIKEY(v)); v->di_tv.v_type = VAR_LIST; v->di_tv.v_lock = VAR_FIXED; v->di_tv.vval.v_list = &fc->l_varlist; } CLEAR_FIELD(fc->l_varlist); fc->l_varlist.lv_refcount = DO_NOT_FREE_CNT; fc->l_varlist.lv_lock = VAR_FIXED; /* * Set a:firstline to "firstline" and a:lastline to "lastline". * Set a:name to named arguments. * Set a:N to the "..." arguments. * Skipped when no a: variables used (in lambda). */ if ((fp->uf_flags & FC_NOARGS) == 0) { add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "firstline", (varnumber_T)funcexe->firstline); add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "lastline", (varnumber_T)funcexe->lastline); } for (i = 0; i < argcount || i < fp->uf_args.ga_len; ++i) { int addlocal = FALSE; typval_T def_rettv; int isdefault = FALSE; ai = i - fp->uf_args.ga_len; if (ai < 0) { // named argument a:name name = FUNCARG(fp, i); if (islambda) addlocal = TRUE; // evaluate named argument default expression isdefault = ai + fp->uf_def_args.ga_len >= 0 && (i >= argcount || (argvars[i].v_type == VAR_SPECIAL && argvars[i].vval.v_number == VVAL_NONE)); if (isdefault) { char_u *default_expr = NULL; def_rettv.v_type = VAR_NUMBER; def_rettv.vval.v_number = -1; default_expr = ((char_u **)(fp->uf_def_args.ga_data)) [ai + fp->uf_def_args.ga_len]; if (eval1(&default_expr, &def_rettv, EVAL_EVALUATE) == FAIL) { default_arg_err = 1; break; } } } else { if ((fp->uf_flags & FC_NOARGS) != 0) // Bail out if no a: arguments used (in lambda). break; // "..." argument a:1, a:2, etc. sprintf((char *)numbuf, "%d", ai + 1); name = numbuf; } if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN) { v = &fc->fixvar[fixvar_idx++].var; v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; STRCPY(v->di_key, name); } else { v = dictitem_alloc(name); if (v == NULL) break; v->di_flags |= DI_FLAGS_RO | DI_FLAGS_FIX; } // Note: the values are copied directly to avoid alloc/free. // "argvars" must have VAR_FIXED for v_lock. v->di_tv = isdefault ? def_rettv : argvars[i]; v->di_tv.v_lock = VAR_FIXED; if (addlocal) { // Named arguments should be accessed without the "a:" prefix in // lambda expressions. Add to the l: dict. copy_tv(&v->di_tv, &v->di_tv); hash_add(&fc->l_vars.dv_hashtab, DI2HIKEY(v)); } else hash_add(&fc->l_avars.dv_hashtab, DI2HIKEY(v)); if (ai >= 0 && ai < MAX_FUNC_ARGS) { listitem_T *li = &fc->l_listitems[ai]; li->li_tv = argvars[i]; li->li_tv.v_lock = VAR_FIXED; list_append(&fc->l_varlist, li); } } // Don't redraw while executing the function. ++RedrawingDisabled; if (fp->uf_flags & FC_SANDBOX) { using_sandbox = TRUE; ++sandbox; } estack_push_ufunc(fp, 1); ESTACK_CHECK_SETUP if (p_verbose >= 12) { ++no_wait_return; verbose_enter_scroll(); smsg(_("calling %s"), SOURCING_NAME); if (p_verbose >= 14) { char_u buf[MSG_BUF_LEN]; char_u numbuf2[NUMBUFLEN]; char_u *tofree; char_u *s; msg_puts("("); for (i = 0; i < argcount; ++i) { if (i > 0) msg_puts(", "); if (argvars[i].v_type == VAR_NUMBER) msg_outnum((long)argvars[i].vval.v_number); else { // Do not want errors such as E724 here. ++emsg_off; s = tv2string(&argvars[i], &tofree, numbuf2, 0); --emsg_off; if (s != NULL) { if (vim_strsize(s) > MSG_BUF_CLEN) { trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN); s = buf; } msg_puts((char *)s); vim_free(tofree); } } } msg_puts(")"); } msg_puts("\n"); // don't overwrite this either verbose_leave_scroll(); --no_wait_return; } #ifdef FEAT_PROFILE if (do_profiling == PROF_YES) { if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL)) { started_profiling = TRUE; func_do_profile(fp); } if (fp->uf_profiling || (fc->caller != NULL && fc->caller->func->uf_profiling)) { ++fp->uf_tm_count; profile_start(&call_start); profile_zero(&fp->uf_tm_children); } script_prof_save(&wait_start); } #endif save_current_sctx = current_sctx; current_sctx = fp->uf_script_ctx; save_did_emsg = did_emsg; did_emsg = FALSE; if (default_arg_err && (fp->uf_flags & FC_ABORT)) did_emsg = TRUE; else if (islambda) { char_u *p = *(char_u **)fp->uf_lines.ga_data + 7; // A Lambda always has the command "return {expr}". It is much faster // to evaluate {expr} directly. ++ex_nesting_level; (void)eval1(&p, rettv, EVAL_EVALUATE); --ex_nesting_level; } else // call do_cmdline() to execute the lines do_cmdline(NULL, get_func_line, (void *)fc, DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT); --RedrawingDisabled; // when the function was aborted because of an error, return -1 if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN) { clear_tv(rettv); rettv->v_type = VAR_NUMBER; rettv->vval.v_number = -1; } #ifdef FEAT_PROFILE if (do_profiling == PROF_YES && (fp->uf_profiling || (fc->caller != NULL && fc->caller->func->uf_profiling))) { profile_end(&call_start); profile_sub_wait(&wait_start, &call_start); profile_add(&fp->uf_tm_total, &call_start); profile_self(&fp->uf_tm_self, &call_start, &fp->uf_tm_children); if (fc->caller != NULL && fc->caller->func->uf_profiling) { profile_add(&fc->caller->func->uf_tm_children, &call_start); profile_add(&fc->caller->func->uf_tml_children, &call_start); } if (started_profiling) // make a ":profdel func" stop profiling the function fp->uf_profiling = FALSE; } #endif // when being verbose, mention the return value if (p_verbose >= 12) { ++no_wait_return; verbose_enter_scroll(); if (aborting()) smsg(_("%s aborted"), SOURCING_NAME); else if (fc->rettv->v_type == VAR_NUMBER) smsg(_("%s returning #%ld"), SOURCING_NAME, (long)fc->rettv->vval.v_number); else { char_u buf[MSG_BUF_LEN]; char_u numbuf2[NUMBUFLEN]; char_u *tofree; char_u *s; // The value may be very long. Skip the middle part, so that we // have some idea how it starts and ends. smsg() would always // truncate it at the end. Don't want errors such as E724 here. ++emsg_off; s = tv2string(fc->rettv, &tofree, numbuf2, 0); --emsg_off; if (s != NULL) { if (vim_strsize(s) > MSG_BUF_CLEN) { trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN); s = buf; } smsg(_("%s returning %s"), SOURCING_NAME, s); vim_free(tofree); } } msg_puts("\n"); // don't overwrite this either verbose_leave_scroll(); --no_wait_return; } ESTACK_CHECK_NOW estack_pop(); current_sctx = save_current_sctx; #ifdef FEAT_PROFILE if (do_profiling == PROF_YES) script_prof_restore(&wait_start); #endif if (using_sandbox) --sandbox; if (p_verbose >= 12 && SOURCING_NAME != NULL) { ++no_wait_return; verbose_enter_scroll(); smsg(_("continuing in %s"), SOURCING_NAME); msg_puts("\n"); // don't overwrite this either verbose_leave_scroll(); --no_wait_return; } did_emsg |= save_did_emsg; --depth; cleanup_function_call(fc); } /* * Call a user function after checking the arguments. */ int call_user_func_check( ufunc_T *fp, int argcount, typval_T *argvars, typval_T *rettv, funcexe_T *funcexe, dict_T *selfdict) { int error; int regular_args = fp->uf_args.ga_len; if (fp->uf_flags & FC_RANGE && funcexe->doesrange != NULL) *funcexe->doesrange = TRUE; if (argcount < regular_args - fp->uf_def_args.ga_len) error = FCERR_TOOFEW; else if (!has_varargs(fp) && argcount > regular_args) error = FCERR_TOOMANY; else if ((fp->uf_flags & FC_DICT) && selfdict == NULL) error = FCERR_DICT; else { int did_save_redo = FALSE; save_redo_T save_redo; /* * Call the user function. * Save and restore search patterns, script variables and * redo buffer. */ save_search_patterns(); if (!ins_compl_active()) { saveRedobuff(&save_redo); did_save_redo = TRUE; } ++fp->uf_calls; call_user_func(fp, argcount, argvars, rettv, funcexe, (fp->uf_flags & FC_DICT) ? selfdict : NULL); if (--fp->uf_calls <= 0 && fp->uf_refcount <= 0) // Function was unreferenced while being used, free it now. func_clear_free(fp, FALSE); if (did_save_redo) restoreRedobuff(&save_redo); restore_search_patterns(); error = FCERR_NONE; } return error; } /* * There are two kinds of function names: * 1. ordinary names, function defined with :function * 2. numbered functions and lambdas * For the first we only count the name stored in func_hashtab as a reference, * using function() does not count as a reference, because the function is * looked up by name. */ static int func_name_refcount(char_u *name) { return isdigit(*name) || *name == '<'; } static funccal_entry_T *funccal_stack = NULL; /* * Save the current function call pointer, and set it to NULL. * Used when executing autocommands and for ":source". */ void save_funccal(funccal_entry_T *entry) { entry->top_funccal = current_funccal; entry->next = funccal_stack; funccal_stack = entry; current_funccal = NULL; } void restore_funccal(void) { if (funccal_stack == NULL) iemsg("INTERNAL: restore_funccal()"); else { current_funccal = funccal_stack->top_funccal; funccal_stack = funccal_stack->next; } } funccall_T * get_current_funccal(void) { return current_funccal; } /* * Mark all functions of script "sid" as deleted. */ void delete_script_functions(int sid) { hashitem_T *hi; ufunc_T *fp; long_u todo; char_u buf[30]; size_t len; buf[0] = K_SPECIAL; buf[1] = KS_EXTRA; buf[2] = (int)KE_SNR; sprintf((char *)buf + 3, "%d_", sid); len = STRLEN(buf); todo = func_hashtab.ht_used; for (hi = func_hashtab.ht_array; todo > 0; ++hi) if (!HASHITEM_EMPTY(hi)) { fp = HI2UF(hi); if (STRNCMP(fp->uf_name, buf, len) == 0) { fp->uf_flags |= FC_DEAD; func_clear(fp, TRUE); } --todo; } } #if defined(EXITFREE) || defined(PROTO) void free_all_functions(void) { hashitem_T *hi; ufunc_T *fp; long_u skipped = 0; long_u todo = 1; long_u used; // Clean up the current_funccal chain and the funccal stack. while (current_funccal != NULL) { clear_tv(current_funccal->rettv); cleanup_function_call(current_funccal); if (current_funccal == NULL && funccal_stack != NULL) restore_funccal(); } // First clear what the functions contain. Since this may lower the // reference count of a function, it may also free a function and change // the hash table. Restart if that happens. while (todo > 0) { todo = func_hashtab.ht_used; for (hi = func_hashtab.ht_array; todo > 0; ++hi) if (!HASHITEM_EMPTY(hi)) { // clear the def function index now fp = HI2UF(hi); fp->uf_flags &= ~FC_DEAD; fp->uf_dfunc_idx = UF_NOT_COMPILED; // Only free functions that are not refcounted, those are // supposed to be freed when no longer referenced. if (func_name_refcount(fp->uf_name)) ++skipped; else { used = func_hashtab.ht_used; func_clear(fp, TRUE); if (used != func_hashtab.ht_used) { skipped = 0; break; } } --todo; } } // Now actually free the functions. Need to start all over every time, // because func_free() may change the hash table. skipped = 0; while (func_hashtab.ht_used > skipped) { todo = func_hashtab.ht_used; for (hi = func_hashtab.ht_array; todo > 0; ++hi) if (!HASHITEM_EMPTY(hi)) { --todo; // Only free functions that are not refcounted, those are // supposed to be freed when no longer referenced. fp = HI2UF(hi); if (func_name_refcount(fp->uf_name)) ++skipped; else { func_free(fp, FALSE); skipped = 0; break; } } } if (skipped == 0) hash_clear(&func_hashtab); free_def_functions(); } #endif /* * Return TRUE if "name" looks like a builtin function name: starts with a * lower case letter and doesn't contain AUTOLOAD_CHAR or ':'. * "len" is the length of "name", or -1 for NUL terminated. */ int builtin_function(char_u *name, int len) { char_u *p; if (!ASCII_ISLOWER(name[0]) || name[1] == ':') return FALSE; p = vim_strchr(name, AUTOLOAD_CHAR); return p == NULL || (len > 0 && p > name + len); } int func_call( char_u *name, typval_T *args, partial_T *partial, dict_T *selfdict, typval_T *rettv) { list_T *l = args->vval.v_list; listitem_T *item; typval_T argv[MAX_FUNC_ARGS + 1]; int argc = 0; int r = 0; CHECK_LIST_MATERIALIZE(l); FOR_ALL_LIST_ITEMS(l, item) { if (argc == MAX_FUNC_ARGS - (partial == NULL ? 0 : partial->pt_argc)) { emsg(_("E699: Too many arguments")); break; } // Make a copy of each argument. This is needed to be able to set // v_lock to VAR_FIXED in the copy without changing the original list. copy_tv(&item->li_tv, &argv[argc++]); } if (item == NULL) { funcexe_T funcexe; CLEAR_FIELD(funcexe); funcexe.firstline = curwin->w_cursor.lnum; funcexe.lastline = curwin->w_cursor.lnum; funcexe.evaluate = TRUE; funcexe.partial = partial; funcexe.selfdict = selfdict; r = call_func(name, -1, rettv, argc, argv, &funcexe); } // Free the arguments. while (argc > 0) clear_tv(&argv[--argc]); return r; } static int callback_depth = 0; int get_callback_depth(void) { return callback_depth; } /* * Invoke call_func() with a callback. */ int call_callback( callback_T *callback, int len, // length of "name" or -1 to use strlen() typval_T *rettv, // return value goes here int argcount, // number of "argvars" typval_T *argvars) // vars for arguments, must have "argcount" // PLUS ONE elements! { funcexe_T funcexe; int ret; CLEAR_FIELD(funcexe); funcexe.evaluate = TRUE; funcexe.partial = callback->cb_partial; ++callback_depth; ret = call_func(callback->cb_name, len, rettv, argcount, argvars, &funcexe); --callback_depth; return ret; } /* * Give an error message for the result of a function. * Nothing if "error" is FCERR_NONE. */ void user_func_error(int error, char_u *name) { switch (error) { case FCERR_UNKNOWN: emsg_funcname(e_unknownfunc, name); break; case FCERR_NOTMETHOD: emsg_funcname( N_("E276: Cannot use function as a method: %s"), name); break; case FCERR_DELETED: emsg_funcname(N_(e_func_deleted), name); break; case FCERR_TOOMANY: emsg_funcname((char *)e_toomanyarg, name); break; case FCERR_TOOFEW: emsg_funcname((char *)e_toofewarg, name); break; case FCERR_SCRIPT: emsg_funcname( N_("E120: Using <SID> not in a script context: %s"), name); break; case FCERR_DICT: emsg_funcname( N_("E725: Calling dict function without Dictionary: %s"), name); break; } } /* * Call a function with its resolved parameters * * Return FAIL when the function can't be called, OK otherwise. * Also returns OK when an error was encountered while executing the function. */ int call_func( char_u *funcname, // name of the function int len, // length of "name" or -1 to use strlen() typval_T *rettv, // return value goes here int argcount_in, // number of "argvars" typval_T *argvars_in, // vars for arguments, must have "argcount" // PLUS ONE elements! funcexe_T *funcexe) // more arguments { int ret = FAIL; int error = FCERR_NONE; int i; ufunc_T *fp = NULL; char_u fname_buf[FLEN_FIXED + 1]; char_u *tofree = NULL; char_u *fname = NULL; char_u *name = NULL; int argcount = argcount_in; typval_T *argvars = argvars_in; dict_T *selfdict = funcexe->selfdict; typval_T argv[MAX_FUNC_ARGS + 1]; // used when "partial" or // "funcexe->basetv" is not NULL int argv_clear = 0; int argv_base = 0; partial_T *partial = funcexe->partial; // Initialize rettv so that it is safe for caller to invoke clear_tv(rettv) // even when call_func() returns FAIL. rettv->v_type = VAR_UNKNOWN; if (partial != NULL) fp = partial->pt_func; if (fp == NULL) { // Make a copy of the name, if it comes from a funcref variable it // could be changed or deleted in the called function. name = len > 0 ? vim_strnsave(funcname, len) : vim_strsave(funcname); if (name == NULL) return ret; fname = fname_trans_sid(name, fname_buf, &tofree, &error); } if (funcexe->doesrange != NULL) *funcexe->doesrange = FALSE; if (partial != NULL) { // When the function has a partial with a dict and there is a dict // argument, use the dict argument. That is backwards compatible. // When the dict was bound explicitly use the one from the partial. if (partial->pt_dict != NULL && (selfdict == NULL || !partial->pt_auto)) selfdict = partial->pt_dict; if (error == FCERR_NONE && partial->pt_argc > 0) { for (argv_clear = 0; argv_clear < partial->pt_argc; ++argv_clear) { if (argv_clear + argcount_in >= MAX_FUNC_ARGS) { error = FCERR_TOOMANY; goto theend; } copy_tv(&partial->pt_argv[argv_clear], &argv[argv_clear]); } for (i = 0; i < argcount_in; ++i) argv[i + argv_clear] = argvars_in[i]; argvars = argv; argcount = partial->pt_argc + argcount_in; } } if (error == FCERR_NONE && funcexe->evaluate) { char_u *rfname = fname; // Ignore "g:" before a function name. if (fp == NULL && fname[0] == 'g' && fname[1] == ':') rfname = fname + 2; rettv->v_type = VAR_NUMBER; // default rettv is number zero rettv->vval.v_number = 0; error = FCERR_UNKNOWN; if (fp != NULL || !builtin_function(rfname, -1)) { /* * User defined function. */ if (fp == NULL) fp = find_func(rfname, FALSE, NULL); // Trigger FuncUndefined event, may load the function. if (fp == NULL && apply_autocmds(EVENT_FUNCUNDEFINED, rfname, rfname, TRUE, NULL) && !aborting()) { // executed an autocommand, search for the function again fp = find_func(rfname, FALSE, NULL); } // Try loading a package. if (fp == NULL && script_autoload(rfname, TRUE) && !aborting()) { // loaded a package, search for the function again fp = find_func(rfname, FALSE, NULL); } if (fp == NULL) { char_u *p = untrans_function_name(rfname); // If using Vim9 script try not local to the script. // TODO: should not do this if the name started with "s:". if (p != NULL) fp = find_func(p, FALSE, NULL); } if (fp != NULL && (fp->uf_flags & FC_DELETED)) error = FCERR_DELETED; else if (fp != NULL) { if (funcexe->argv_func != NULL) // postponed filling in the arguments, do it now argcount = funcexe->argv_func(argcount, argvars, argv_clear, fp->uf_args.ga_len); if (funcexe->basetv != NULL) { // Method call: base->Method() mch_memmove(&argv[1], argvars, sizeof(typval_T) * argcount); argv[0] = *funcexe->basetv; argcount++; argvars = argv; argv_base = 1; } error = call_user_func_check(fp, argcount, argvars, rettv, funcexe, selfdict); } } else if (funcexe->basetv != NULL) { /* * expr->method(): Find the method name in the table, call its * implementation with the base as one of the arguments. */ error = call_internal_method(fname, argcount, argvars, rettv, funcexe->basetv); } else { /* * Find the function name in the table, call its implementation. */ error = call_internal_func(fname, argcount, argvars, rettv); } /* * The function call (or "FuncUndefined" autocommand sequence) might * have been aborted by an error, an interrupt, or an explicitly thrown * exception that has not been caught so far. This situation can be * tested for by calling aborting(). For an error in an internal * function or for the "E132" error in call_user_func(), however, the * throw point at which the "force_abort" flag (temporarily reset by * emsg()) is normally updated has not been reached yet. We need to * update that flag first to make aborting() reliable. */ update_force_abort(); } if (error == FCERR_NONE) ret = OK; theend: /* * Report an error unless the argument evaluation or function call has been * cancelled due to an aborting error, an interrupt, or an exception. */ if (!aborting()) { user_func_error(error, (name != NULL) ? name : funcname); } // clear the copies made from the partial while (argv_clear > 0) clear_tv(&argv[--argv_clear + argv_base]); vim_free(tofree); vim_free(name); return ret; } static char_u * printable_func_name(ufunc_T *fp) { return fp->uf_name_exp != NULL ? fp->uf_name_exp : fp->uf_name; } /* * List the head of the function: "function name(arg1, arg2)". */ static void list_func_head(ufunc_T *fp, int indent) { int j; msg_start(); if (indent) msg_puts(" "); if (fp->uf_dfunc_idx != UF_NOT_COMPILED) msg_puts("def "); else msg_puts("function "); msg_puts((char *)printable_func_name(fp)); msg_putchar('('); for (j = 0; j < fp->uf_args.ga_len; ++j) { if (j) msg_puts(", "); msg_puts((char *)FUNCARG(fp, j)); if (fp->uf_arg_types != NULL) { char *tofree; msg_puts(": "); msg_puts(type_name(fp->uf_arg_types[j], &tofree)); vim_free(tofree); } if (j >= fp->uf_args.ga_len - fp->uf_def_args.ga_len) { msg_puts(" = "); msg_puts(((char **)(fp->uf_def_args.ga_data)) [j - fp->uf_args.ga_len + fp->uf_def_args.ga_len]); } } if (fp->uf_varargs) { if (j) msg_puts(", "); msg_puts("..."); } if (fp->uf_va_name != NULL) { if (j) msg_puts(", "); msg_puts("..."); msg_puts((char *)fp->uf_va_name); if (fp->uf_va_type) { char *tofree; msg_puts(": "); msg_puts(type_name(fp->uf_va_type, &tofree)); vim_free(tofree); } } msg_putchar(')'); if (fp->uf_dfunc_idx != UF_NOT_COMPILED) { if (fp->uf_ret_type != &t_void) { char *tofree; msg_puts(": "); msg_puts(type_name(fp->uf_ret_type, &tofree)); vim_free(tofree); } } else if (fp->uf_flags & FC_ABORT) msg_puts(" abort"); if (fp->uf_flags & FC_RANGE) msg_puts(" range"); if (fp->uf_flags & FC_DICT) msg_puts(" dict"); if (fp->uf_flags & FC_CLOSURE) msg_puts(" closure"); msg_clr_eos(); if (p_verbose > 0) last_set_msg(fp->uf_script_ctx); } /* * Get a function name, translating "<SID>" and "<SNR>". * Also handles a Funcref in a List or Dictionary. * Returns the function name in allocated memory, or NULL for failure. * Set "*is_global" to TRUE when the function must be global, unless * "is_global" is NULL. * flags: * TFN_INT: internal function name OK * TFN_QUIET: be quiet * TFN_NO_AUTOLOAD: do not use script autoloading * TFN_NO_DEREF: do not dereference a Funcref * Advances "pp" to just after the function name (if no error). */ char_u * trans_function_name( char_u **pp, int *is_global, int skip, // only find the end, don't evaluate int flags, funcdict_T *fdp, // return: info about dictionary used partial_T **partial) // return: partial of a FuncRef { char_u *name = NULL; char_u *start; char_u *end; int lead; char_u sid_buf[20]; int len; int extra = 0; lval_T lv; int vim9script; if (fdp != NULL) CLEAR_POINTER(fdp); start = *pp; // Check for hard coded <SNR>: already translated function ID (from a user // command). if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA && (*pp)[2] == (int)KE_SNR) { *pp += 3; len = get_id_len(pp) + 3; return vim_strnsave(start, len); } // A name starting with "<SID>" or "<SNR>" is local to a script. But // don't skip over "s:", get_lval() needs it for "s:dict.func". lead = eval_fname_script(start); if (lead > 2) start += lead; // Note that TFN_ flags use the same values as GLV_ flags. end = get_lval(start, NULL, &lv, FALSE, skip, flags | GLV_READ_ONLY, lead > 2 ? 0 : FNE_CHECK_START); if (end == start) { if (!skip) emsg(_("E129: Function name required")); goto theend; } if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range))) { /* * Report an invalid expression in braces, unless the expression * evaluation has been cancelled due to an aborting error, an * interrupt, or an exception. */ if (!aborting()) { if (end != NULL) semsg(_(e_invarg2), start); } else *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR); goto theend; } if (lv.ll_tv != NULL) { if (fdp != NULL) { fdp->fd_dict = lv.ll_dict; fdp->fd_newkey = lv.ll_newkey; lv.ll_newkey = NULL; fdp->fd_di = lv.ll_di; } if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL) { name = vim_strsave(lv.ll_tv->vval.v_string); *pp = end; } else if (lv.ll_tv->v_type == VAR_PARTIAL && lv.ll_tv->vval.v_partial != NULL) { name = vim_strsave(partial_name(lv.ll_tv->vval.v_partial)); *pp = end; if (partial != NULL) *partial = lv.ll_tv->vval.v_partial; } else { if (!skip && !(flags & TFN_QUIET) && (fdp == NULL || lv.ll_dict == NULL || fdp->fd_newkey == NULL)) emsg(_(e_funcref)); else *pp = end; name = NULL; } goto theend; } if (lv.ll_name == NULL) { // Error found, but continue after the function name. *pp = end; goto theend; } // Check if the name is a Funcref. If so, use the value. if (lv.ll_exp_name != NULL) { len = (int)STRLEN(lv.ll_exp_name); name = deref_func_name(lv.ll_exp_name, &len, partial, flags & TFN_NO_AUTOLOAD); if (name == lv.ll_exp_name) name = NULL; } else if (!(flags & TFN_NO_DEREF)) { len = (int)(end - *pp); name = deref_func_name(*pp, &len, partial, flags & TFN_NO_AUTOLOAD); if (name == *pp) name = NULL; } if (name != NULL) { name = vim_strsave(name); *pp = end; if (STRNCMP(name, "<SNR>", 5) == 0) { // Change "<SNR>" to the byte sequence. name[0] = K_SPECIAL; name[1] = KS_EXTRA; name[2] = (int)KE_SNR; mch_memmove(name + 3, name + 5, STRLEN(name + 5) + 1); } goto theend; } if (lv.ll_exp_name != NULL) { len = (int)STRLEN(lv.ll_exp_name); if (lead <= 2 && lv.ll_name == lv.ll_exp_name && STRNCMP(lv.ll_name, "s:", 2) == 0) { // When there was "s:" already or the name expanded to get a // leading "s:" then remove it. lv.ll_name += 2; len -= 2; lead = 2; } } else { // skip over "s:" and "g:" if (lead == 2 || (lv.ll_name[0] == 'g' && lv.ll_name[1] == ':')) { if (is_global != NULL && lv.ll_name[0] == 'g') *is_global = TRUE; lv.ll_name += 2; } len = (int)(end - lv.ll_name); } // In Vim9 script a user function is script-local by default. vim9script = ASCII_ISUPPER(*start) && current_sctx.sc_version == SCRIPT_VERSION_VIM9; /* * Copy the function name to allocated memory. * Accept <SID>name() inside a script, translate into <SNR>123_name(). * Accept <SNR>123_name() outside a script. */ if (skip) lead = 0; // do nothing else if (lead > 0 || vim9script) { if (!vim9script) lead = 3; if (vim9script || (lv.ll_exp_name != NULL && eval_fname_sid(lv.ll_exp_name)) || eval_fname_sid(*pp)) { // It's script-local, "s:" or "<SID>" if (current_sctx.sc_sid <= 0) { emsg(_(e_usingsid)); goto theend; } sprintf((char *)sid_buf, "%ld_", (long)current_sctx.sc_sid); if (vim9script) extra = 3 + (int)STRLEN(sid_buf); else lead += (int)STRLEN(sid_buf); } } else if (!(flags & TFN_INT) && builtin_function(lv.ll_name, len)) { semsg(_("E128: Function name must start with a capital or \"s:\": %s"), start); goto theend; } if (!skip && !(flags & TFN_QUIET) && !(flags & TFN_NO_DEREF)) { char_u *cp = vim_strchr(lv.ll_name, ':'); if (cp != NULL && cp < end) { semsg(_("E884: Function name cannot contain a colon: %s"), start); goto theend; } } name = alloc(len + lead + extra + 1); if (name != NULL) { if (!skip && (lead > 0 || vim9script)) { name[0] = K_SPECIAL; name[1] = KS_EXTRA; name[2] = (int)KE_SNR; if (vim9script || lead > 3) // If it's "<SID>" STRCPY(name + 3, sid_buf); } mch_memmove(name + lead + extra, lv.ll_name, (size_t)len); name[lead + extra + len] = NUL; } *pp = end; theend: clear_lval(&lv); return name; } /* * Assuming "name" is the result of trans_function_name() and it was prefixed * to use the script-local name, return the unmodified name (points into * "name"). Otherwise return NULL. * This can be used to first search for a script-local function and fall back * to the global function if not found. */ char_u * untrans_function_name(char_u *name) { char_u *p; if (*name == K_SPECIAL && current_sctx.sc_version == SCRIPT_VERSION_VIM9) { p = vim_strchr(name, '_'); if (p != NULL) return p + 1; } return NULL; } /* * List functions. When "regmatch" is NULL all of then. * Otherwise functions matching "regmatch". */ static void list_functions(regmatch_T *regmatch) { long_u used = func_hashtab.ht_used; long_u todo = used; hashitem_T *ht_array = func_hashtab.ht_array; hashitem_T *hi; for (hi = ht_array; todo > 0 && !got_int; ++hi) { if (!HASHITEM_EMPTY(hi)) { ufunc_T *fp = HI2UF(hi); --todo; if ((fp->uf_flags & FC_DEAD) == 0 && (regmatch == NULL ? !message_filtered(fp->uf_name) && !func_name_refcount(fp->uf_name) : !isdigit(*fp->uf_name) && vim_regexec(regmatch, fp->uf_name, 0))) { list_func_head(fp, FALSE); if (used != func_hashtab.ht_used || ht_array != func_hashtab.ht_array) { emsg(_("E454: function list was modified")); return; } } } } } /* * ":function" also supporting nested ":def". * Returns a pointer to the function or NULL if no function defined. */ ufunc_T * def_function(exarg_T *eap, char_u *name_arg) { char_u *theline; char_u *line_to_free = NULL; int j; int c; int saved_did_emsg; int saved_wait_return = need_wait_return; char_u *name = name_arg; int is_global = FALSE; char_u *p; char_u *arg; char_u *line_arg = NULL; garray_T newargs; garray_T argtypes; garray_T default_args; garray_T newlines; int varargs = FALSE; int flags = 0; char_u *ret_type = NULL; ufunc_T *fp = NULL; int overwrite = FALSE; int indent; int nesting; #define MAX_FUNC_NESTING 50 char nesting_def[MAX_FUNC_NESTING]; dictitem_T *v; funcdict_T fudi; static int func_nr = 0; // number for nameless function int paren; hashitem_T *hi; int do_concat = TRUE; linenr_T sourcing_lnum_off; linenr_T sourcing_lnum_top; int is_heredoc = FALSE; char_u *skip_until = NULL; char_u *heredoc_trimmed = NULL; if (in_vim9script() && eap->forceit) { emsg(_(e_nobang)); return NULL; } /* * ":function" without argument: list functions. */ if (ends_excmd2(eap->cmd, eap->arg)) { if (!eap->skip) list_functions(NULL); eap->nextcmd = check_nextcmd(eap->arg); return NULL; } /* * ":function /pat": list functions matching pattern. */ if (*eap->arg == '/') { p = skip_regexp(eap->arg + 1, '/', TRUE); if (!eap->skip) { regmatch_T regmatch; c = *p; *p = NUL; regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC); *p = c; if (regmatch.regprog != NULL) { regmatch.rm_ic = p_ic; list_functions(®match); vim_regfree(regmatch.regprog); } } if (*p == '/') ++p; eap->nextcmd = check_nextcmd(p); return NULL; } ga_init(&newargs); ga_init(&argtypes); ga_init(&default_args); /* * Get the function name. There are these situations: * func normal function name * "name" == func, "fudi.fd_dict" == NULL * dict.func new dictionary entry * "name" == NULL, "fudi.fd_dict" set, * "fudi.fd_di" == NULL, "fudi.fd_newkey" == func * dict.func existing dict entry with a Funcref * "name" == func, "fudi.fd_dict" set, * "fudi.fd_di" set, "fudi.fd_newkey" == NULL * dict.func existing dict entry that's not a Funcref * "name" == NULL, "fudi.fd_dict" set, * "fudi.fd_di" set, "fudi.fd_newkey" == NULL * s:func script-local function name * g:func global function name, same as "func" */ p = eap->arg; if (name_arg != NULL) { // nested function, argument is (args). paren = TRUE; CLEAR_FIELD(fudi); } else { name = trans_function_name(&p, &is_global, eap->skip, TFN_NO_AUTOLOAD, &fudi, NULL); paren = (vim_strchr(p, '(') != NULL); if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip) { /* * Return on an invalid expression in braces, unless the expression * evaluation has been cancelled due to an aborting error, an * interrupt, or an exception. */ if (!aborting()) { if (!eap->skip && fudi.fd_newkey != NULL) semsg(_(e_dictkey), fudi.fd_newkey); vim_free(fudi.fd_newkey); return NULL; } else eap->skip = TRUE; } } // An error in a function call during evaluation of an expression in magic // braces should not cause the function not to be defined. saved_did_emsg = did_emsg; did_emsg = FALSE; /* * ":function func" with only function name: list function. */ if (!paren) { if (!ends_excmd(*skipwhite(p))) { emsg(_(e_trailing)); goto ret_free; } eap->nextcmd = check_nextcmd(p); if (eap->nextcmd != NULL) *p = NUL; if (!eap->skip && !got_int) { fp = find_func(name, is_global, NULL); if (fp == NULL && ASCII_ISUPPER(*eap->arg)) { char_u *up = untrans_function_name(name); // With Vim9 script the name was made script-local, if not // found try again with the original name. if (up != NULL) fp = find_func(up, FALSE, NULL); } if (fp != NULL) { list_func_head(fp, TRUE); for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j) { if (FUNCLINE(fp, j) == NULL) continue; msg_putchar('\n'); msg_outnum((long)(j + 1)); if (j < 9) msg_putchar(' '); if (j < 99) msg_putchar(' '); msg_prt_line(FUNCLINE(fp, j), FALSE); out_flush(); // show a line at a time ui_breakcheck(); } if (!got_int) { msg_putchar('\n'); if (fp->uf_dfunc_idx != UF_NOT_COMPILED) msg_puts(" enddef"); else msg_puts(" endfunction"); } } else emsg_funcname(N_("E123: Undefined function: %s"), eap->arg); } goto ret_free; } /* * ":function name(arg1, arg2)" Define function. */ p = skipwhite(p); if (*p != '(') { if (!eap->skip) { semsg(_("E124: Missing '(': %s"), eap->arg); goto ret_free; } // attempt to continue by skipping some text if (vim_strchr(p, '(') != NULL) p = vim_strchr(p, '('); } p = skipwhite(p + 1); ga_init2(&newlines, (int)sizeof(char_u *), 3); if (!eap->skip && name_arg == NULL) { // Check the name of the function. Unless it's a dictionary function // (that we are overwriting). if (name != NULL) arg = name; else arg = fudi.fd_newkey; if (arg != NULL && (fudi.fd_di == NULL || (fudi.fd_di->di_tv.v_type != VAR_FUNC && fudi.fd_di->di_tv.v_type != VAR_PARTIAL))) { if (*arg == K_SPECIAL) j = 3; else j = 0; while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j]) : eval_isnamec(arg[j]))) ++j; if (arg[j] != NUL) emsg_funcname((char *)e_invarg2, arg); } // Disallow using the g: dict. if (fudi.fd_dict != NULL && fudi.fd_dict->dv_scope == VAR_DEF_SCOPE) emsg(_("E862: Cannot use g: here")); } // This may get more lines and make the pointers into the first line // invalid. if (get_function_args(&p, ')', &newargs, eap->cmdidx == CMD_def ? &argtypes : NULL, &varargs, &default_args, eap->skip, eap, &line_to_free) == FAIL) goto errret_2; if (eap->cmdidx == CMD_def) { // find the return type: :def Func(): type if (*p == ':') { ret_type = skipwhite(p + 1); p = skip_type(ret_type); if (p > ret_type) { ret_type = vim_strnsave(ret_type, p - ret_type); p = skipwhite(p); } else { semsg(_("E1056: expected a type: %s"), ret_type); ret_type = NULL; } } } else // find extra arguments "range", "dict", "abort" and "closure" for (;;) { p = skipwhite(p); if (STRNCMP(p, "range", 5) == 0) { flags |= FC_RANGE; p += 5; } else if (STRNCMP(p, "dict", 4) == 0) { flags |= FC_DICT; p += 4; } else if (STRNCMP(p, "abort", 5) == 0) { flags |= FC_ABORT; p += 5; } else if (STRNCMP(p, "closure", 7) == 0) { flags |= FC_CLOSURE; p += 7; if (current_funccal == NULL) { emsg_funcname(N_("E932: Closure function should not be at top level: %s"), name == NULL ? (char_u *)"" : name); goto erret; } } else break; } // When there is a line break use what follows for the function body. // Makes 'exe "func Test()\n...\nendfunc"' work. if (*p == '\n') line_arg = p + 1; else if (*p != NUL && *p != '"' && !(eap->cmdidx == CMD_def && *p == '#') && !eap->skip && !did_emsg) emsg(_(e_trailing)); /* * Read the body of the function, until "}", ":endfunction" or ":enddef" is * found. */ if (KeyTyped) { // Check if the function already exists, don't let the user type the // whole function before telling him it doesn't work! For a script we // need to skip the body to be able to find what follows. if (!eap->skip && !eap->forceit) { if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL) emsg(_(e_funcdict)); else if (name != NULL && find_func(name, is_global, NULL) != NULL) emsg_funcname(e_funcexts, name); } if (!eap->skip && did_emsg) goto erret; msg_putchar('\n'); // don't overwrite the function name cmdline_row = msg_row; } // Save the starting line number. sourcing_lnum_top = SOURCING_LNUM; indent = 2; nesting = 0; nesting_def[nesting] = (eap->cmdidx == CMD_def); for (;;) { if (KeyTyped) { msg_scroll = TRUE; saved_wait_return = FALSE; } need_wait_return = FALSE; if (line_arg != NULL) { // Use eap->arg, split up in parts by line breaks. theline = line_arg; p = vim_strchr(theline, '\n'); if (p == NULL) line_arg += STRLEN(line_arg); else { *p = NUL; line_arg = p + 1; } } else { vim_free(line_to_free); if (eap->getline == NULL) theline = getcmdline(':', 0L, indent, do_concat); else theline = eap->getline(':', eap->cookie, indent, do_concat); line_to_free = theline; } if (KeyTyped) lines_left = Rows - 1; if (theline == NULL) { if (eap->cmdidx == CMD_def) emsg(_("E1057: Missing :enddef")); else emsg(_("E126: Missing :endfunction")); goto erret; } // Detect line continuation: SOURCING_LNUM increased more than one. sourcing_lnum_off = get_sourced_lnum(eap->getline, eap->cookie); if (SOURCING_LNUM < sourcing_lnum_off) sourcing_lnum_off -= SOURCING_LNUM; else sourcing_lnum_off = 0; if (skip_until != NULL) { // Don't check for ":endfunc"/":enddef" between // * ":append" and "." // * ":python <<EOF" and "EOF" // * ":let {var-name} =<< [trim] {marker}" and "{marker}" if (heredoc_trimmed == NULL || (is_heredoc && skipwhite(theline) == theline) || STRNCMP(theline, heredoc_trimmed, STRLEN(heredoc_trimmed)) == 0) { if (heredoc_trimmed == NULL) p = theline; else if (is_heredoc) p = skipwhite(theline) == theline ? theline : theline + STRLEN(heredoc_trimmed); else p = theline + STRLEN(heredoc_trimmed); if (STRCMP(p, skip_until) == 0) { VIM_CLEAR(skip_until); VIM_CLEAR(heredoc_trimmed); do_concat = TRUE; is_heredoc = FALSE; } } } else { // skip ':' and blanks for (p = theline; VIM_ISWHITE(*p) || *p == ':'; ++p) ; // Check for "endfunction" or "enddef". if (checkforcmd(&p, nesting_def[nesting] ? "enddef" : "endfunction", 4) && nesting-- == 0) { char_u *nextcmd = NULL; if (*p == '|') nextcmd = p + 1; else if (line_arg != NULL && *skipwhite(line_arg) != NUL) nextcmd = line_arg; else if (*p != NUL && *p != '"' && p_verbose > 0) give_warning2(eap->cmdidx == CMD_def ? (char_u *)_("W1001: Text found after :enddef: %s") : (char_u *)_("W22: Text found after :endfunction: %s"), p, TRUE); if (nextcmd != NULL) { // Another command follows. If the line came from "eap" we // can simply point into it, otherwise we need to change // "eap->cmdlinep". eap->nextcmd = nextcmd; if (line_to_free != NULL) { vim_free(*eap->cmdlinep); *eap->cmdlinep = line_to_free; line_to_free = NULL; } } break; } // Increase indent inside "if", "while", "for" and "try", decrease // at "end". if (indent > 2 && (*p == '}' || STRNCMP(p, "end", 3) == 0)) indent -= 2; else if (STRNCMP(p, "if", 2) == 0 || STRNCMP(p, "wh", 2) == 0 || STRNCMP(p, "for", 3) == 0 || STRNCMP(p, "try", 3) == 0) indent += 2; // Check for defining a function inside this function. // Only recognize "def" inside "def", not inside "function", // For backwards compatibility, see Test_function_python(). c = *p; if (checkforcmd(&p, "function", 2) || (eap->cmdidx == CMD_def && checkforcmd(&p, "def", 3))) { if (*p == '!') p = skipwhite(p + 1); p += eval_fname_script(p); vim_free(trans_function_name(&p, NULL, TRUE, 0, NULL, NULL)); if (*skipwhite(p) == '(') { if (nesting == MAX_FUNC_NESTING - 1) emsg(_("E1058: function nesting too deep")); else { ++nesting; nesting_def[nesting] = (c == 'd'); indent += 2; } } } // Check for ":append", ":change", ":insert". Not for :def. p = skip_range(p, NULL); if (eap->cmdidx != CMD_def && ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p')) || (p[0] == 'c' && (!ASCII_ISALPHA(p[1]) || (p[1] == 'h' && (!ASCII_ISALPHA(p[2]) || (p[2] == 'a' && (STRNCMP(&p[3], "nge", 3) != 0 || !ASCII_ISALPHA(p[6]))))))) || (p[0] == 'i' && (!ASCII_ISALPHA(p[1]) || (p[1] == 'n' && (!ASCII_ISALPHA(p[2]) || (p[2] == 's' && (!ASCII_ISALPHA(p[3]) || p[3] == 'e')))))))) skip_until = vim_strsave((char_u *)"."); // Check for ":python <<EOF", ":tcl <<EOF", etc. arg = skipwhite(skiptowhite(p)); if (arg[0] == '<' && arg[1] =='<' && ((p[0] == 'p' && p[1] == 'y' && (!ASCII_ISALNUM(p[2]) || p[2] == 't' || ((p[2] == '3' || p[2] == 'x') && !ASCII_ISALPHA(p[3])))) || (p[0] == 'p' && p[1] == 'e' && (!ASCII_ISALPHA(p[2]) || p[2] == 'r')) || (p[0] == 't' && p[1] == 'c' && (!ASCII_ISALPHA(p[2]) || p[2] == 'l')) || (p[0] == 'l' && p[1] == 'u' && p[2] == 'a' && !ASCII_ISALPHA(p[3])) || (p[0] == 'r' && p[1] == 'u' && p[2] == 'b' && (!ASCII_ISALPHA(p[3]) || p[3] == 'y')) || (p[0] == 'm' && p[1] == 'z' && (!ASCII_ISALPHA(p[2]) || p[2] == 's')) )) { // ":python <<" continues until a dot, like ":append" p = skipwhite(arg + 2); if (STRNCMP(p, "trim", 4) == 0) { // Ignore leading white space. p = skipwhite(p + 4); heredoc_trimmed = vim_strnsave(theline, skipwhite(theline) - theline); } if (*p == NUL) skip_until = vim_strsave((char_u *)"."); else skip_until = vim_strnsave(p, skiptowhite(p) - p); do_concat = FALSE; is_heredoc = TRUE; } // Check for ":let v =<< [trim] EOF" // and ":let [a, b] =<< [trim] EOF" arg = skipwhite(skiptowhite(p)); if (*arg == '[') arg = vim_strchr(arg, ']'); if (arg != NULL) { arg = skipwhite(skiptowhite(arg)); if ( arg[0] == '=' && arg[1] == '<' && arg[2] =='<' && ((p[0] == 'l' && p[1] == 'e' && (!ASCII_ISALNUM(p[2]) || (p[2] == 't' && !ASCII_ISALNUM(p[3])))))) { p = skipwhite(arg + 3); if (STRNCMP(p, "trim", 4) == 0) { // Ignore leading white space. p = skipwhite(p + 4); heredoc_trimmed = vim_strnsave(theline, skipwhite(theline) - theline); } skip_until = vim_strnsave(p, skiptowhite(p) - p); do_concat = FALSE; is_heredoc = TRUE; } } } // Add the line to the function. if (ga_grow(&newlines, 1 + sourcing_lnum_off) == FAIL) goto erret; // Copy the line to newly allocated memory. get_one_sourceline() // allocates 250 bytes per line, this saves 80% on average. The cost // is an extra alloc/free. p = vim_strsave(theline); if (p == NULL) goto erret; ((char_u **)(newlines.ga_data))[newlines.ga_len++] = p; // Add NULL lines for continuation lines, so that the line count is // equal to the index in the growarray. while (sourcing_lnum_off-- > 0) ((char_u **)(newlines.ga_data))[newlines.ga_len++] = NULL; // Check for end of eap->arg. if (line_arg != NULL && *line_arg == NUL) line_arg = NULL; } // Don't define the function when skipping commands or when an error was // detected. if (eap->skip || did_emsg) goto erret; /* * If there are no errors, add the function */ if (fudi.fd_dict == NULL) { hashtab_T *ht; v = find_var(name, &ht, FALSE); if (v != NULL && v->di_tv.v_type == VAR_FUNC) { emsg_funcname(N_("E707: Function name conflicts with variable: %s"), name); goto erret; } fp = find_func_even_dead(name, is_global, NULL); if (fp != NULL) { int dead = fp->uf_flags & FC_DEAD; // Function can be replaced with "function!" and when sourcing the // same script again, but only once. if (!dead && !eap->forceit && (fp->uf_script_ctx.sc_sid != current_sctx.sc_sid || fp->uf_script_ctx.sc_seq == current_sctx.sc_seq)) { emsg_funcname(e_funcexts, name); goto erret; } if (fp->uf_calls > 0) { emsg_funcname( N_("E127: Cannot redefine function %s: It is in use"), name); goto erret; } if (fp->uf_refcount > 1) { // This function is referenced somewhere, don't redefine it but // create a new one. --fp->uf_refcount; fp->uf_flags |= FC_REMOVED; fp = NULL; overwrite = TRUE; } else { char_u *exp_name = fp->uf_name_exp; // redefine existing function, keep the expanded name VIM_CLEAR(name); fp->uf_name_exp = NULL; func_clear_items(fp); fp->uf_name_exp = exp_name; fp->uf_flags &= ~FC_DEAD; #ifdef FEAT_PROFILE fp->uf_profiling = FALSE; fp->uf_prof_initialized = FALSE; #endif } } } else { char numbuf[20]; fp = NULL; if (fudi.fd_newkey == NULL && !eap->forceit) { emsg(_(e_funcdict)); goto erret; } if (fudi.fd_di == NULL) { // Can't add a function to a locked dictionary if (var_check_lock(fudi.fd_dict->dv_lock, eap->arg, FALSE)) goto erret; } // Can't change an existing function if it is locked else if (var_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg, FALSE)) goto erret; // Give the function a sequential number. Can only be used with a // Funcref! vim_free(name); sprintf(numbuf, "%d", ++func_nr); name = vim_strsave((char_u *)numbuf); if (name == NULL) goto erret; } if (fp == NULL) { if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL) { int slen, plen; char_u *scriptname; // Check that the autoload name matches the script name. j = FAIL; if (SOURCING_NAME != NULL) { scriptname = autoload_name(name); if (scriptname != NULL) { p = vim_strchr(scriptname, '/'); plen = (int)STRLEN(p); slen = (int)STRLEN(SOURCING_NAME); if (slen > plen && fnamecmp(p, SOURCING_NAME + slen - plen) == 0) j = OK; vim_free(scriptname); } } if (j == FAIL) { semsg(_("E746: Function name does not match script file name: %s"), name); goto erret; } } fp = alloc_clear(offsetof(ufunc_T, uf_name) + STRLEN(name) + 1); if (fp == NULL) goto erret; fp->uf_dfunc_idx = eap->cmdidx == CMD_def ? UF_TO_BE_COMPILED : UF_NOT_COMPILED; if (fudi.fd_dict != NULL) { if (fudi.fd_di == NULL) { // add new dict entry fudi.fd_di = dictitem_alloc(fudi.fd_newkey); if (fudi.fd_di == NULL) { vim_free(fp); fp = NULL; goto erret; } if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL) { vim_free(fudi.fd_di); vim_free(fp); fp = NULL; goto erret; } } else // overwrite existing dict entry clear_tv(&fudi.fd_di->di_tv); fudi.fd_di->di_tv.v_type = VAR_FUNC; fudi.fd_di->di_tv.vval.v_string = vim_strsave(name); // behave like "dict" was used flags |= FC_DICT; } // insert the new function in the function list set_ufunc_name(fp, name); if (overwrite) { hi = hash_find(&func_hashtab, name); hi->hi_key = UF2HIKEY(fp); } else if (hash_add(&func_hashtab, UF2HIKEY(fp)) == FAIL) { vim_free(fp); fp = NULL; goto erret; } fp->uf_refcount = 1; } fp->uf_args = newargs; fp->uf_def_args = default_args; fp->uf_ret_type = &t_any; fp->uf_func_type = &t_func_any; if (eap->cmdidx == CMD_def) { int lnum_save = SOURCING_LNUM; fp->uf_dfunc_idx = UF_TO_BE_COMPILED; // error messages are for the first function line SOURCING_LNUM = sourcing_lnum_top; // parse the argument types ga_init2(&fp->uf_type_list, sizeof(type_T *), 10); if (argtypes.ga_len > 0) { // When "varargs" is set the last name/type goes into uf_va_name // and uf_va_type. int len = argtypes.ga_len - (varargs ? 1 : 0); if (len > 0) fp->uf_arg_types = ALLOC_CLEAR_MULT(type_T *, len); if (fp->uf_arg_types != NULL) { int i; type_T *type; for (i = 0; i < len; ++ i) { p = ((char_u **)argtypes.ga_data)[i]; if (p == NULL) // will get the type from the default value type = &t_unknown; else type = parse_type(&p, &fp->uf_type_list); if (type == NULL) { SOURCING_LNUM = lnum_save; goto errret_2; } fp->uf_arg_types[i] = type; } } if (varargs) { // Move the last argument "...name: type" to uf_va_name and // uf_va_type. fp->uf_va_name = ((char_u **)fp->uf_args.ga_data) [fp->uf_args.ga_len - 1]; --fp->uf_args.ga_len; p = ((char_u **)argtypes.ga_data)[len]; if (p == NULL) // todo: get type from default value fp->uf_va_type = &t_any; else fp->uf_va_type = parse_type(&p, &fp->uf_type_list); if (fp->uf_va_type == NULL) { SOURCING_LNUM = lnum_save; goto errret_2; } } varargs = FALSE; } // parse the return type, if any if (ret_type == NULL) fp->uf_ret_type = &t_void; else { p = ret_type; fp->uf_ret_type = parse_type(&p, &fp->uf_type_list); } SOURCING_LNUM = lnum_save; } else fp->uf_dfunc_idx = UF_NOT_COMPILED; fp->uf_lines = newlines; if ((flags & FC_CLOSURE) != 0) { if (register_closure(fp) == FAIL) goto erret; } else fp->uf_scoped = NULL; #ifdef FEAT_PROFILE if (prof_def_func()) func_do_profile(fp); #endif fp->uf_varargs = varargs; if (sandbox) flags |= FC_SANDBOX; if (in_vim9script() && !ASCII_ISUPPER(*fp->uf_name)) flags |= FC_VIM9; fp->uf_flags = flags; fp->uf_calls = 0; fp->uf_cleared = FALSE; fp->uf_script_ctx = current_sctx; fp->uf_script_ctx.sc_lnum += sourcing_lnum_top; if (is_export) { fp->uf_flags |= FC_EXPORT; // let ex_export() know the export worked. is_export = FALSE; } if (eap->cmdidx == CMD_def) set_function_type(fp); goto ret_free; erret: ga_clear_strings(&newargs); ga_clear_strings(&default_args); errret_2: ga_clear_strings(&newlines); ret_free: ga_clear_strings(&argtypes); vim_free(skip_until); vim_free(line_to_free); vim_free(fudi.fd_newkey); if (name != name_arg) vim_free(name); vim_free(ret_type); did_emsg |= saved_did_emsg; need_wait_return |= saved_wait_return; return fp; } /* * ":function" */ void ex_function(exarg_T *eap) { (void)def_function(eap, NULL); } /* * :defcompile - compile all :def functions in the current script. */ void ex_defcompile(exarg_T *eap UNUSED) { long_u ht_used = func_hashtab.ht_used; int todo = (int)ht_used; hashitem_T *hi; ufunc_T *ufunc; for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; ufunc = HI2UF(hi); if (ufunc->uf_script_ctx.sc_sid == current_sctx.sc_sid && ufunc->uf_dfunc_idx == UF_TO_BE_COMPILED) { compile_def_function(ufunc, FALSE, NULL); if (func_hashtab.ht_used != ht_used) { // another function has been defined, need to start over hi = func_hashtab.ht_array; ht_used = func_hashtab.ht_used; todo = (int)ht_used; --hi; } } } } } /* * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case). * Return 2 if "p" starts with "s:". * Return 0 otherwise. */ int eval_fname_script(char_u *p) { // Use MB_STRICMP() because in Turkish comparing the "I" may not work with // the standard library function. if (p[0] == '<' && (MB_STRNICMP(p + 1, "SID>", 4) == 0 || MB_STRNICMP(p + 1, "SNR>", 4) == 0)) return 5; if (p[0] == 's' && p[1] == ':') return 2; return 0; } int translated_function_exists(char_u *name, int is_global) { if (builtin_function(name, -1)) return has_internal_func(name); return find_func(name, is_global, NULL) != NULL; } /* * Return TRUE when "ufunc" has old-style "..." varargs * or named varargs "...name: type". */ int has_varargs(ufunc_T *ufunc) { return ufunc->uf_varargs || ufunc->uf_va_name != NULL; } /* * Return TRUE if a function "name" exists. * If "no_defef" is TRUE, do not dereference a Funcref. */ int function_exists(char_u *name, int no_deref) { char_u *nm = name; char_u *p; int n = FALSE; int flag; int is_global = FALSE; flag = TFN_INT | TFN_QUIET | TFN_NO_AUTOLOAD; if (no_deref) flag |= TFN_NO_DEREF; p = trans_function_name(&nm, &is_global, FALSE, flag, NULL, NULL); nm = skipwhite(nm); // Only accept "funcname", "funcname ", "funcname (..." and // "funcname(...", not "funcname!...". if (p != NULL && (*nm == NUL || *nm == '(')) n = translated_function_exists(p, is_global); vim_free(p); return n; } #if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO) char_u * get_expanded_name(char_u *name, int check) { char_u *nm = name; char_u *p; int is_global = FALSE; p = trans_function_name(&nm, &is_global, FALSE, TFN_INT|TFN_QUIET, NULL, NULL); if (p != NULL && *nm == NUL && (!check || translated_function_exists(p, is_global))) return p; vim_free(p); return NULL; } #endif /* * Function given to ExpandGeneric() to obtain the list of user defined * function names. */ char_u * get_user_func_name(expand_T *xp, int idx) { static long_u done; static hashitem_T *hi; ufunc_T *fp; if (idx == 0) { done = 0; hi = func_hashtab.ht_array; } if (done < func_hashtab.ht_used) { if (done++ > 0) ++hi; while (HASHITEM_EMPTY(hi)) ++hi; fp = HI2UF(hi); // don't show dead, dict and lambda functions if ((fp->uf_flags & FC_DEAD) || (fp->uf_flags & FC_DICT) || STRNCMP(fp->uf_name, "<lambda>", 8) == 0) return (char_u *)""; if (STRLEN(fp->uf_name) + 4 >= IOSIZE) return fp->uf_name; // prevents overflow cat_func_name(IObuff, fp); if (xp->xp_context != EXPAND_USER_FUNC) { STRCAT(IObuff, "("); if (!has_varargs(fp) && fp->uf_args.ga_len == 0) STRCAT(IObuff, ")"); } return IObuff; } return NULL; } /* * ":delfunction {name}" */ void ex_delfunction(exarg_T *eap) { ufunc_T *fp = NULL; char_u *p; char_u *name; funcdict_T fudi; int is_global = FALSE; p = eap->arg; name = trans_function_name(&p, &is_global, eap->skip, 0, &fudi, NULL); vim_free(fudi.fd_newkey); if (name == NULL) { if (fudi.fd_dict != NULL && !eap->skip) emsg(_(e_funcref)); return; } if (!ends_excmd(*skipwhite(p))) { vim_free(name); emsg(_(e_trailing)); return; } eap->nextcmd = check_nextcmd(p); if (eap->nextcmd != NULL) *p = NUL; if (!eap->skip) fp = find_func(name, is_global, NULL); vim_free(name); if (!eap->skip) { if (fp == NULL) { if (!eap->forceit) semsg(_(e_nofunc), eap->arg); return; } if (fp->uf_calls > 0) { semsg(_("E131: Cannot delete function %s: It is in use"), eap->arg); return; } if (fp->uf_flags & FC_VIM9) { semsg(_("E1084: Cannot delete Vim9 script function %s"), eap->arg); return; } if (fudi.fd_dict != NULL) { // Delete the dict item that refers to the function, it will // invoke func_unref() and possibly delete the function. dictitem_remove(fudi.fd_dict, fudi.fd_di); } else { // A normal function (not a numbered function or lambda) has a // refcount of 1 for the entry in the hashtable. When deleting // it and the refcount is more than one, it should be kept. // A numbered function and lambda should be kept if the refcount is // one or more. if (fp->uf_refcount > (func_name_refcount(fp->uf_name) ? 0 : 1)) { // Function is still referenced somewhere. Don't free it but // do remove it from the hashtable. if (func_remove(fp)) fp->uf_refcount--; fp->uf_flags |= FC_DELETED; } else func_clear_free(fp, FALSE); } } } /* * Unreference a Function: decrement the reference count and free it when it * becomes zero. */ void func_unref(char_u *name) { ufunc_T *fp = NULL; if (name == NULL || !func_name_refcount(name)) return; fp = find_func(name, FALSE, NULL); if (fp == NULL && isdigit(*name)) { #ifdef EXITFREE if (!entered_free_all_mem) #endif internal_error("func_unref()"); } if (fp != NULL && --fp->uf_refcount <= 0) { // Only delete it when it's not being used. Otherwise it's done // when "uf_calls" becomes zero. if (fp->uf_calls == 0) func_clear_free(fp, FALSE); } } /* * Unreference a Function: decrement the reference count and free it when it * becomes zero. */ void func_ptr_unref(ufunc_T *fp) { if (fp != NULL && --fp->uf_refcount <= 0) { // Only delete it when it's not being used. Otherwise it's done // when "uf_calls" becomes zero. if (fp->uf_calls == 0) func_clear_free(fp, FALSE); } } /* * Count a reference to a Function. */ void func_ref(char_u *name) { ufunc_T *fp; if (name == NULL || !func_name_refcount(name)) return; fp = find_func(name, FALSE, NULL); if (fp != NULL) ++fp->uf_refcount; else if (isdigit(*name)) // Only give an error for a numbered function. // Fail silently, when named or lambda function isn't found. internal_error("func_ref()"); } /* * Count a reference to a Function. */ void func_ptr_ref(ufunc_T *fp) { if (fp != NULL) ++fp->uf_refcount; } /* * Return TRUE if items in "fc" do not have "copyID". That means they are not * referenced from anywhere that is in use. */ static int can_free_funccal(funccall_T *fc, int copyID) { return (fc->l_varlist.lv_copyID != copyID && fc->l_vars.dv_copyID != copyID && fc->l_avars.dv_copyID != copyID && fc->fc_copyID != copyID); } /* * ":return [expr]" */ void ex_return(exarg_T *eap) { char_u *arg = eap->arg; typval_T rettv; int returning = FALSE; if (current_funccal == NULL) { emsg(_("E133: :return not inside a function")); return; } if (eap->skip) ++emsg_skip; eap->nextcmd = NULL; if ((*arg != NUL && *arg != '|' && *arg != '\n') && eval0(arg, &rettv, &eap->nextcmd, eap->skip ? 0 : EVAL_EVALUATE) != FAIL) { if (!eap->skip) returning = do_return(eap, FALSE, TRUE, &rettv); else clear_tv(&rettv); } // It's safer to return also on error. else if (!eap->skip) { // In return statement, cause_abort should be force_abort. update_force_abort(); /* * Return unless the expression evaluation has been cancelled due to an * aborting error, an interrupt, or an exception. */ if (!aborting()) returning = do_return(eap, FALSE, TRUE, NULL); } // When skipping or the return gets pending, advance to the next command // in this line (!returning). Otherwise, ignore the rest of the line. // Following lines will be ignored by get_func_line(). if (returning) eap->nextcmd = NULL; else if (eap->nextcmd == NULL) // no argument eap->nextcmd = check_nextcmd(arg); if (eap->skip) --emsg_skip; } /* * ":1,25call func(arg1, arg2)" function call. */ void ex_call(exarg_T *eap) { char_u *arg = eap->arg; char_u *startarg; char_u *name; char_u *tofree; int len; typval_T rettv; linenr_T lnum; int doesrange; int failed = FALSE; funcdict_T fudi; partial_T *partial = NULL; if (eap->skip) { // trans_function_name() doesn't work well when skipping, use eval0() // instead to skip to any following command, e.g. for: // :if 0 | call dict.foo().bar() | endif ++emsg_skip; if (eval0(eap->arg, &rettv, &eap->nextcmd, 0) != FAIL) clear_tv(&rettv); --emsg_skip; return; } tofree = trans_function_name(&arg, NULL, eap->skip, TFN_INT, &fudi, &partial); if (fudi.fd_newkey != NULL) { // Still need to give an error message for missing key. semsg(_(e_dictkey), fudi.fd_newkey); vim_free(fudi.fd_newkey); } if (tofree == NULL) return; // Increase refcount on dictionary, it could get deleted when evaluating // the arguments. if (fudi.fd_dict != NULL) ++fudi.fd_dict->dv_refcount; // If it is the name of a variable of type VAR_FUNC or VAR_PARTIAL use its // contents. For VAR_PARTIAL get its partial, unless we already have one // from trans_function_name(). len = (int)STRLEN(tofree); name = deref_func_name(tofree, &len, partial != NULL ? NULL : &partial, FALSE); // Skip white space to allow ":call func ()". Not good, but required for // backward compatibility. startarg = skipwhite(arg); rettv.v_type = VAR_UNKNOWN; // clear_tv() uses this if (*startarg != '(') { semsg(_(e_missing_paren), eap->arg); goto end; } /* * When skipping, evaluate the function once, to find the end of the * arguments. * When the function takes a range, this is discovered after the first * call, and the loop is broken. */ if (eap->skip) { ++emsg_skip; lnum = eap->line2; // do it once, also with an invalid range } else lnum = eap->line1; for ( ; lnum <= eap->line2; ++lnum) { funcexe_T funcexe; if (!eap->skip && eap->addr_count > 0) { if (lnum > curbuf->b_ml.ml_line_count) { // If the function deleted lines or switched to another buffer // the line number may become invalid. emsg(_(e_invrange)); break; } curwin->w_cursor.lnum = lnum; curwin->w_cursor.col = 0; curwin->w_cursor.coladd = 0; } arg = startarg; CLEAR_FIELD(funcexe); funcexe.firstline = eap->line1; funcexe.lastline = eap->line2; funcexe.doesrange = &doesrange; funcexe.evaluate = !eap->skip; funcexe.partial = partial; funcexe.selfdict = fudi.fd_dict; if (get_func_tv(name, -1, &rettv, &arg, &funcexe) == FAIL) { failed = TRUE; break; } if (has_watchexpr()) dbg_check_breakpoint(eap); // Handle a function returning a Funcref, Dictionary or List. if (handle_subscript(&arg, &rettv, eap->skip ? 0 : EVAL_EVALUATE, TRUE, name, &name) == FAIL) { failed = TRUE; break; } clear_tv(&rettv); if (doesrange || eap->skip) break; // Stop when immediately aborting on error, or when an interrupt // occurred or an exception was thrown but not caught. // get_func_tv() returned OK, so that the check for trailing // characters below is executed. if (aborting()) break; } if (eap->skip) --emsg_skip; // When inside :try we need to check for following "| catch". if (!failed || eap->cstack->cs_trylevel > 0) { // Check for trailing illegal characters and a following command. if (!ends_excmd2(eap->arg, arg)) { if (!failed) { emsg_severe = TRUE; emsg(_(e_trailing)); } } else eap->nextcmd = check_nextcmd(arg); } end: dict_unref(fudi.fd_dict); vim_free(tofree); } /* * Return from a function. Possibly makes the return pending. Also called * for a pending return at the ":endtry" or after returning from an extra * do_cmdline(). "reanimate" is used in the latter case. "is_cmd" is set * when called due to a ":return" command. "rettv" may point to a typval_T * with the return rettv. Returns TRUE when the return can be carried out, * FALSE when the return gets pending. */ int do_return( exarg_T *eap, int reanimate, int is_cmd, void *rettv) { int idx; cstack_T *cstack = eap->cstack; if (reanimate) // Undo the return. current_funccal->returned = FALSE; /* * Cleanup (and inactivate) conditionals, but stop when a try conditional * not in its finally clause (which then is to be executed next) is found. * In this case, make the ":return" pending for execution at the ":endtry". * Otherwise, return normally. */ idx = cleanup_conditionals(eap->cstack, 0, TRUE); if (idx >= 0) { cstack->cs_pending[idx] = CSTP_RETURN; if (!is_cmd && !reanimate) // A pending return again gets pending. "rettv" points to an // allocated variable with the rettv of the original ":return"'s // argument if present or is NULL else. cstack->cs_rettv[idx] = rettv; else { // When undoing a return in order to make it pending, get the stored // return rettv. if (reanimate) rettv = current_funccal->rettv; if (rettv != NULL) { // Store the value of the pending return. if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL) *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv; else emsg(_(e_outofmem)); } else cstack->cs_rettv[idx] = NULL; if (reanimate) { // The pending return value could be overwritten by a ":return" // without argument in a finally clause; reset the default // return value. current_funccal->rettv->v_type = VAR_NUMBER; current_funccal->rettv->vval.v_number = 0; } } report_make_pending(CSTP_RETURN, rettv); } else { current_funccal->returned = TRUE; // If the return is carried out now, store the return value. For // a return immediately after reanimation, the value is already // there. if (!reanimate && rettv != NULL) { clear_tv(current_funccal->rettv); *current_funccal->rettv = *(typval_T *)rettv; if (!is_cmd) vim_free(rettv); } } return idx < 0; } /* * Free the variable with a pending return value. */ void discard_pending_return(void *rettv) { free_tv((typval_T *)rettv); } /* * Generate a return command for producing the value of "rettv". The result * is an allocated string. Used by report_pending() for verbose messages. */ char_u * get_return_cmd(void *rettv) { char_u *s = NULL; char_u *tofree = NULL; char_u numbuf[NUMBUFLEN]; if (rettv != NULL) s = echo_string((typval_T *)rettv, &tofree, numbuf, 0); if (s == NULL) s = (char_u *)""; STRCPY(IObuff, ":return "); STRNCPY(IObuff + 8, s, IOSIZE - 8); if (STRLEN(s) + 8 >= IOSIZE) STRCPY(IObuff + IOSIZE - 4, "..."); vim_free(tofree); return vim_strsave(IObuff); } /* * Get next function line. * Called by do_cmdline() to get the next line. * Returns allocated string, or NULL for end of function. */ char_u * get_func_line( int c UNUSED, void *cookie, int indent UNUSED, int do_concat UNUSED) { funccall_T *fcp = (funccall_T *)cookie; ufunc_T *fp = fcp->func; char_u *retval; garray_T *gap; // growarray with function lines // If breakpoints have been added/deleted need to check for it. if (fcp->dbg_tick != debug_tick) { fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, SOURCING_LNUM); fcp->dbg_tick = debug_tick; } #ifdef FEAT_PROFILE if (do_profiling == PROF_YES) func_line_end(cookie); #endif gap = &fp->uf_lines; if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try()) || fcp->returned) retval = NULL; else { // Skip NULL lines (continuation lines). while (fcp->linenr < gap->ga_len && ((char_u **)(gap->ga_data))[fcp->linenr] == NULL) ++fcp->linenr; if (fcp->linenr >= gap->ga_len) retval = NULL; else { retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]); SOURCING_LNUM = fcp->linenr; #ifdef FEAT_PROFILE if (do_profiling == PROF_YES) func_line_start(cookie); #endif } } // Did we encounter a breakpoint? if (fcp->breakpoint != 0 && fcp->breakpoint <= SOURCING_LNUM) { dbg_breakpoint(fp->uf_name, SOURCING_LNUM); // Find next breakpoint. fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, SOURCING_LNUM); fcp->dbg_tick = debug_tick; } return retval; } /* * Return TRUE if the currently active function should be ended, because a * return was encountered or an error occurred. Used inside a ":while". */ int func_has_ended(void *cookie) { funccall_T *fcp = (funccall_T *)cookie; // Ignore the "abort" flag if the abortion behavior has been changed due to // an error inside a try conditional. return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try()) || fcp->returned); } /* * return TRUE if cookie indicates a function which "abort"s on errors. */ int func_has_abort( void *cookie) { return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT; } /* * Turn "dict.Func" into a partial for "Func" bound to "dict". * Don't do this when "Func" is already a partial that was bound * explicitly (pt_auto is FALSE). * Changes "rettv" in-place. * Returns the updated "selfdict_in". */ dict_T * make_partial(dict_T *selfdict_in, typval_T *rettv) { char_u *fname; char_u *tofree = NULL; ufunc_T *fp; char_u fname_buf[FLEN_FIXED + 1]; int error; dict_T *selfdict = selfdict_in; if (rettv->v_type == VAR_PARTIAL && rettv->vval.v_partial->pt_func != NULL) fp = rettv->vval.v_partial->pt_func; else { fname = rettv->v_type == VAR_FUNC ? rettv->vval.v_string : rettv->vval.v_partial->pt_name; // Translate "s:func" to the stored function name. fname = fname_trans_sid(fname, fname_buf, &tofree, &error); fp = find_func(fname, FALSE, NULL); vim_free(tofree); } if (fp != NULL && (fp->uf_flags & FC_DICT)) { partial_T *pt = ALLOC_CLEAR_ONE(partial_T); if (pt != NULL) { pt->pt_refcount = 1; pt->pt_dict = selfdict; pt->pt_auto = TRUE; selfdict = NULL; if (rettv->v_type == VAR_FUNC) { // Just a function: Take over the function name and use // selfdict. pt->pt_name = rettv->vval.v_string; } else { partial_T *ret_pt = rettv->vval.v_partial; int i; // Partial: copy the function name, use selfdict and copy // args. Can't take over name or args, the partial might // be referenced elsewhere. if (ret_pt->pt_name != NULL) { pt->pt_name = vim_strsave(ret_pt->pt_name); func_ref(pt->pt_name); } else { pt->pt_func = ret_pt->pt_func; func_ptr_ref(pt->pt_func); } if (ret_pt->pt_argc > 0) { pt->pt_argv = ALLOC_MULT(typval_T, ret_pt->pt_argc); if (pt->pt_argv == NULL) // out of memory: drop the arguments pt->pt_argc = 0; else { pt->pt_argc = ret_pt->pt_argc; for (i = 0; i < pt->pt_argc; i++) copy_tv(&ret_pt->pt_argv[i], &pt->pt_argv[i]); } } partial_unref(ret_pt); } rettv->v_type = VAR_PARTIAL; rettv->vval.v_partial = pt; } } return selfdict; } /* * Return the name of the executed function. */ char_u * func_name(void *cookie) { return ((funccall_T *)cookie)->func->uf_name; } /* * Return the address holding the next breakpoint line for a funccall cookie. */ linenr_T * func_breakpoint(void *cookie) { return &((funccall_T *)cookie)->breakpoint; } /* * Return the address holding the debug tick for a funccall cookie. */ int * func_dbg_tick(void *cookie) { return &((funccall_T *)cookie)->dbg_tick; } /* * Return the nesting level for a funccall cookie. */ int func_level(void *cookie) { return ((funccall_T *)cookie)->level; } /* * Return TRUE when a function was ended by a ":return" command. */ int current_func_returned(void) { return current_funccal->returned; } int free_unref_funccal(int copyID, int testing) { int did_free = FALSE; int did_free_funccal = FALSE; funccall_T *fc, **pfc; for (pfc = &previous_funccal; *pfc != NULL; ) { if (can_free_funccal(*pfc, copyID)) { fc = *pfc; *pfc = fc->caller; free_funccal_contents(fc); did_free = TRUE; did_free_funccal = TRUE; } else pfc = &(*pfc)->caller; } if (did_free_funccal) // When a funccal was freed some more items might be garbage // collected, so run again. (void)garbage_collect(testing); return did_free; } /* * Get function call environment based on backtrace debug level */ static funccall_T * get_funccal(void) { int i; funccall_T *funccal; funccall_T *temp_funccal; funccal = current_funccal; if (debug_backtrace_level > 0) { for (i = 0; i < debug_backtrace_level; i++) { temp_funccal = funccal->caller; if (temp_funccal) funccal = temp_funccal; else // backtrace level overflow. reset to max debug_backtrace_level = i; } } return funccal; } /* * Return the hashtable used for local variables in the current funccal. * Return NULL if there is no current funccal. */ hashtab_T * get_funccal_local_ht() { if (current_funccal == NULL || current_funccal->l_vars.dv_refcount == 0) return NULL; return &get_funccal()->l_vars.dv_hashtab; } /* * Return the l: scope variable. * Return NULL if there is no current funccal. */ dictitem_T * get_funccal_local_var() { if (current_funccal == NULL || current_funccal->l_vars.dv_refcount == 0) return NULL; return &get_funccal()->l_vars_var; } /* * Return the hashtable used for argument in the current funccal. * Return NULL if there is no current funccal. */ hashtab_T * get_funccal_args_ht() { if (current_funccal == NULL || current_funccal->l_vars.dv_refcount == 0) return NULL; return &get_funccal()->l_avars.dv_hashtab; } /* * Return the a: scope variable. * Return NULL if there is no current funccal. */ dictitem_T * get_funccal_args_var() { if (current_funccal == NULL || current_funccal->l_vars.dv_refcount == 0) return NULL; return &get_funccal()->l_avars_var; } /* * List function variables, if there is a function. */ void list_func_vars(int *first) { if (current_funccal != NULL && current_funccal->l_vars.dv_refcount > 0) list_hashtable_vars(¤t_funccal->l_vars.dv_hashtab, "l:", FALSE, first); } /* * If "ht" is the hashtable for local variables in the current funccal, return * the dict that contains it. * Otherwise return NULL. */ dict_T * get_current_funccal_dict(hashtab_T *ht) { if (current_funccal != NULL && ht == ¤t_funccal->l_vars.dv_hashtab) return ¤t_funccal->l_vars; return NULL; } /* * Search hashitem in parent scope. */ hashitem_T * find_hi_in_scoped_ht(char_u *name, hashtab_T **pht) { funccall_T *old_current_funccal = current_funccal; hashtab_T *ht; hashitem_T *hi = NULL; char_u *varname; if (current_funccal == NULL || current_funccal->func->uf_scoped == NULL) return NULL; // Search in parent scope, which can be referenced from a lambda. current_funccal = current_funccal->func->uf_scoped; while (current_funccal != NULL) { ht = find_var_ht(name, &varname); if (ht != NULL && *varname != NUL) { hi = hash_find(ht, varname); if (!HASHITEM_EMPTY(hi)) { *pht = ht; break; } } if (current_funccal == current_funccal->func->uf_scoped) break; current_funccal = current_funccal->func->uf_scoped; } current_funccal = old_current_funccal; return hi; } /* * Search variable in parent scope. */ dictitem_T * find_var_in_scoped_ht(char_u *name, int no_autoload) { dictitem_T *v = NULL; funccall_T *old_current_funccal = current_funccal; hashtab_T *ht; char_u *varname; if (current_funccal == NULL || current_funccal->func->uf_scoped == NULL) return NULL; // Search in parent scope which is possible to reference from lambda current_funccal = current_funccal->func->uf_scoped; while (current_funccal) { ht = find_var_ht(name, &varname); if (ht != NULL && *varname != NUL) { v = find_var_in_ht(ht, *name, varname, no_autoload); if (v != NULL) break; } if (current_funccal == current_funccal->func->uf_scoped) break; current_funccal = current_funccal->func->uf_scoped; } current_funccal = old_current_funccal; return v; } /* * Set "copyID + 1" in previous_funccal and callers. */ int set_ref_in_previous_funccal(int copyID) { int abort = FALSE; funccall_T *fc; for (fc = previous_funccal; !abort && fc != NULL; fc = fc->caller) { fc->fc_copyID = copyID + 1; abort = abort || set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID + 1, NULL) || set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID + 1, NULL) || set_ref_in_list_items(&fc->l_varlist, copyID + 1, NULL); } return abort; } static int set_ref_in_funccal(funccall_T *fc, int copyID) { int abort = FALSE; if (fc->fc_copyID != copyID) { fc->fc_copyID = copyID; abort = abort || set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID, NULL) || set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID, NULL) || set_ref_in_list_items(&fc->l_varlist, copyID, NULL) || set_ref_in_func(NULL, fc->func, copyID); } return abort; } /* * Set "copyID" in all local vars and arguments in the call stack. */ int set_ref_in_call_stack(int copyID) { int abort = FALSE; funccall_T *fc; funccal_entry_T *entry; for (fc = current_funccal; !abort && fc != NULL; fc = fc->caller) abort = abort || set_ref_in_funccal(fc, copyID); // Also go through the funccal_stack. for (entry = funccal_stack; !abort && entry != NULL; entry = entry->next) for (fc = entry->top_funccal; !abort && fc != NULL; fc = fc->caller) abort = abort || set_ref_in_funccal(fc, copyID); return abort; } /* * Set "copyID" in all functions available by name. */ int set_ref_in_functions(int copyID) { int todo; hashitem_T *hi = NULL; int abort = FALSE; ufunc_T *fp; todo = (int)func_hashtab.ht_used; for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; fp = HI2UF(hi); if (!func_name_refcount(fp->uf_name)) abort = abort || set_ref_in_func(NULL, fp, copyID); } } return abort; } /* * Set "copyID" in all function arguments. */ int set_ref_in_func_args(int copyID) { int i; int abort = FALSE; for (i = 0; i < funcargs.ga_len; ++i) abort = abort || set_ref_in_item(((typval_T **)funcargs.ga_data)[i], copyID, NULL, NULL); return abort; } /* * Mark all lists and dicts referenced through function "name" with "copyID". * Returns TRUE if setting references failed somehow. */ int set_ref_in_func(char_u *name, ufunc_T *fp_in, int copyID) { ufunc_T *fp = fp_in; funccall_T *fc; int error = FCERR_NONE; char_u fname_buf[FLEN_FIXED + 1]; char_u *tofree = NULL; char_u *fname; int abort = FALSE; if (name == NULL && fp_in == NULL) return FALSE; if (fp_in == NULL) { fname = fname_trans_sid(name, fname_buf, &tofree, &error); fp = find_func(fname, FALSE, NULL); } if (fp != NULL) { for (fc = fp->uf_scoped; fc != NULL; fc = fc->func->uf_scoped) abort = abort || set_ref_in_funccal(fc, copyID); } vim_free(tofree); return abort; } #endif // FEAT_EVAL