Mercurial > vim
view src/evalvars.c @ 18174:1ec6539cef68 v8.1.2082
patch 8.1.2082: some files have a weird name to fit in 8.3 characters
Commit: https://github.com/vim/vim/commit/30e8e73506e4522ef4aebf7d525c0e6ffe8805fd
Author: Bram Moolenaar <Bram@vim.org>
Date: Fri Sep 27 13:08:36 2019 +0200
patch 8.1.2082: some files have a weird name to fit in 8.3 characters
Problem: Some files have a weird name to fit in 8.3 characters.
Solution: Use a nicer names.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Fri, 27 Sep 2019 13:15:03 +0200 |
| parents | 5c8906f653f5 |
| children | 9ea364ccf216 |
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. */ /* * evalvars.c: functions for dealing with variables */ #include "vim.h" #if defined(FEAT_EVAL) || defined(PROTO) static char *e_letunexp = N_("E18: Unexpected characters in :let"); static dictitem_T globvars_var; // variable used for g: static dict_T globvardict; // Dictionary with g: variables #define globvarht globvardict.dv_hashtab /* * Old Vim variables such as "v:version" are also available without the "v:". * Also in functions. We need a special hashtable for them. */ static hashtab_T compat_hashtab; /* * Array to hold the value of v: variables. * The value is in a dictitem, so that it can also be used in the v: scope. * The reason to use this table anyway is for very quick access to the * variables with the VV_ defines. */ // values for vv_flags: #define VV_COMPAT 1 // compatible, also used without "v:" #define VV_RO 2 // read-only #define VV_RO_SBX 4 // read-only in the sandbox #define VV_NAME(s, t) s, {{t, 0, {0}}, 0, {0}} static struct vimvar { char *vv_name; // name of variable, without v: dictitem16_T vv_di; // value and name for key (max 16 chars!) char vv_flags; // VV_COMPAT, VV_RO, VV_RO_SBX } vimvars[VV_LEN] = { // The order here must match the VV_ defines in vim.h! // Initializing a union does not work, leave tv.vval empty to get zero's. {VV_NAME("count", VAR_NUMBER), VV_COMPAT+VV_RO}, {VV_NAME("count1", VAR_NUMBER), VV_RO}, {VV_NAME("prevcount", VAR_NUMBER), VV_RO}, {VV_NAME("errmsg", VAR_STRING), VV_COMPAT}, {VV_NAME("warningmsg", VAR_STRING), 0}, {VV_NAME("statusmsg", VAR_STRING), 0}, {VV_NAME("shell_error", VAR_NUMBER), VV_COMPAT+VV_RO}, {VV_NAME("this_session", VAR_STRING), VV_COMPAT}, {VV_NAME("version", VAR_NUMBER), VV_COMPAT+VV_RO}, {VV_NAME("lnum", VAR_NUMBER), VV_RO_SBX}, {VV_NAME("termresponse", VAR_STRING), VV_RO}, {VV_NAME("fname", VAR_STRING), VV_RO}, {VV_NAME("lang", VAR_STRING), VV_RO}, {VV_NAME("lc_time", VAR_STRING), VV_RO}, {VV_NAME("ctype", VAR_STRING), VV_RO}, {VV_NAME("charconvert_from", VAR_STRING), VV_RO}, {VV_NAME("charconvert_to", VAR_STRING), VV_RO}, {VV_NAME("fname_in", VAR_STRING), VV_RO}, {VV_NAME("fname_out", VAR_STRING), VV_RO}, {VV_NAME("fname_new", VAR_STRING), VV_RO}, {VV_NAME("fname_diff", VAR_STRING), VV_RO}, {VV_NAME("cmdarg", VAR_STRING), VV_RO}, {VV_NAME("foldstart", VAR_NUMBER), VV_RO_SBX}, {VV_NAME("foldend", VAR_NUMBER), VV_RO_SBX}, {VV_NAME("folddashes", VAR_STRING), VV_RO_SBX}, {VV_NAME("foldlevel", VAR_NUMBER), VV_RO_SBX}, {VV_NAME("progname", VAR_STRING), VV_RO}, {VV_NAME("servername", VAR_STRING), VV_RO}, {VV_NAME("dying", VAR_NUMBER), VV_RO}, {VV_NAME("exception", VAR_STRING), VV_RO}, {VV_NAME("throwpoint", VAR_STRING), VV_RO}, {VV_NAME("register", VAR_STRING), VV_RO}, {VV_NAME("cmdbang", VAR_NUMBER), VV_RO}, {VV_NAME("insertmode", VAR_STRING), VV_RO}, {VV_NAME("val", VAR_UNKNOWN), VV_RO}, {VV_NAME("key", VAR_UNKNOWN), VV_RO}, {VV_NAME("profiling", VAR_NUMBER), VV_RO}, {VV_NAME("fcs_reason", VAR_STRING), VV_RO}, {VV_NAME("fcs_choice", VAR_STRING), 0}, {VV_NAME("beval_bufnr", VAR_NUMBER), VV_RO}, {VV_NAME("beval_winnr", VAR_NUMBER), VV_RO}, {VV_NAME("beval_winid", VAR_NUMBER), VV_RO}, {VV_NAME("beval_lnum", VAR_NUMBER), VV_RO}, {VV_NAME("beval_col", VAR_NUMBER), VV_RO}, {VV_NAME("beval_text", VAR_STRING), VV_RO}, {VV_NAME("scrollstart", VAR_STRING), 0}, {VV_NAME("swapname", VAR_STRING), VV_RO}, {VV_NAME("swapchoice", VAR_STRING), 0}, {VV_NAME("swapcommand", VAR_STRING), VV_RO}, {VV_NAME("char", VAR_STRING), 0}, {VV_NAME("mouse_win", VAR_NUMBER), 0}, {VV_NAME("mouse_winid", VAR_NUMBER), 0}, {VV_NAME("mouse_lnum", VAR_NUMBER), 0}, {VV_NAME("mouse_col", VAR_NUMBER), 0}, {VV_NAME("operator", VAR_STRING), VV_RO}, {VV_NAME("searchforward", VAR_NUMBER), 0}, {VV_NAME("hlsearch", VAR_NUMBER), 0}, {VV_NAME("oldfiles", VAR_LIST), 0}, {VV_NAME("windowid", VAR_NUMBER), VV_RO}, {VV_NAME("progpath", VAR_STRING), VV_RO}, {VV_NAME("completed_item", VAR_DICT), VV_RO}, {VV_NAME("option_new", VAR_STRING), VV_RO}, {VV_NAME("option_old", VAR_STRING), VV_RO}, {VV_NAME("option_oldlocal", VAR_STRING), VV_RO}, {VV_NAME("option_oldglobal", VAR_STRING), VV_RO}, {VV_NAME("option_command", VAR_STRING), VV_RO}, {VV_NAME("option_type", VAR_STRING), VV_RO}, {VV_NAME("errors", VAR_LIST), 0}, {VV_NAME("false", VAR_SPECIAL), VV_RO}, {VV_NAME("true", VAR_SPECIAL), VV_RO}, {VV_NAME("null", VAR_SPECIAL), VV_RO}, {VV_NAME("none", VAR_SPECIAL), VV_RO}, {VV_NAME("vim_did_enter", VAR_NUMBER), VV_RO}, {VV_NAME("testing", VAR_NUMBER), 0}, {VV_NAME("t_number", VAR_NUMBER), VV_RO}, {VV_NAME("t_string", VAR_NUMBER), VV_RO}, {VV_NAME("t_func", VAR_NUMBER), VV_RO}, {VV_NAME("t_list", VAR_NUMBER), VV_RO}, {VV_NAME("t_dict", VAR_NUMBER), VV_RO}, {VV_NAME("t_float", VAR_NUMBER), VV_RO}, {VV_NAME("t_bool", VAR_NUMBER), VV_RO}, {VV_NAME("t_none", VAR_NUMBER), VV_RO}, {VV_NAME("t_job", VAR_NUMBER), VV_RO}, {VV_NAME("t_channel", VAR_NUMBER), VV_RO}, {VV_NAME("t_blob", VAR_NUMBER), VV_RO}, {VV_NAME("termrfgresp", VAR_STRING), VV_RO}, {VV_NAME("termrbgresp", VAR_STRING), VV_RO}, {VV_NAME("termu7resp", VAR_STRING), VV_RO}, {VV_NAME("termstyleresp", VAR_STRING), VV_RO}, {VV_NAME("termblinkresp", VAR_STRING), VV_RO}, {VV_NAME("event", VAR_DICT), VV_RO}, {VV_NAME("versionlong", VAR_NUMBER), VV_RO}, {VV_NAME("echospace", VAR_NUMBER), VV_RO}, }; // shorthand #define vv_type vv_di.di_tv.v_type #define vv_nr vv_di.di_tv.vval.v_number #define vv_float vv_di.di_tv.vval.v_float #define vv_str vv_di.di_tv.vval.v_string #define vv_list vv_di.di_tv.vval.v_list #define vv_dict vv_di.di_tv.vval.v_dict #define vv_blob vv_di.di_tv.vval.v_blob #define vv_tv vv_di.di_tv static dictitem_T vimvars_var; // variable used for v: static dict_T vimvardict; // Dictionary with v: variables #define vimvarht vimvardict.dv_hashtab // for VIM_VERSION_ defines #include "version.h" /* * Array to hold the hashtab with variables local to each sourced script. * Each item holds a variable (nameless) that points to the dict_T. */ typedef struct { dictitem_T sv_var; dict_T sv_dict; } scriptvar_T; static garray_T ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL}; #define SCRIPT_SV(id) (((scriptvar_T **)ga_scripts.ga_data)[(id) - 1]) #define SCRIPT_VARS(id) (SCRIPT_SV(id)->sv_dict.dv_hashtab) static void ex_let_const(exarg_T *eap, int is_const); static char_u *skip_var_one(char_u *arg); static void list_glob_vars(int *first); static void list_buf_vars(int *first); static void list_win_vars(int *first); static void list_tab_vars(int *first); static char_u *list_arg_vars(exarg_T *eap, char_u *arg, int *first); static char_u *ex_let_one(char_u *arg, typval_T *tv, int copy, int is_const, char_u *endchars, char_u *op); static void ex_unletlock(exarg_T *eap, char_u *argstart, int deep); static int do_unlet_var(lval_T *lp, char_u *name_end, int forceit); static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock); static void item_lock(typval_T *tv, int deep, int lock); static void delete_var(hashtab_T *ht, hashitem_T *hi); static void list_one_var(dictitem_T *v, char *prefix, int *first); static void list_one_var_a(char *prefix, char_u *name, int type, char_u *string, int *first); /* * Initialize global and vim special variables */ void evalvars_init(void) { int i; struct vimvar *p; init_var_dict(&globvardict, &globvars_var, VAR_DEF_SCOPE); init_var_dict(&vimvardict, &vimvars_var, VAR_SCOPE); vimvardict.dv_lock = VAR_FIXED; hash_init(&compat_hashtab); for (i = 0; i < VV_LEN; ++i) { p = &vimvars[i]; if (STRLEN(p->vv_name) > DICTITEM16_KEY_LEN) { iemsg("INTERNAL: name too long, increase size of dictitem16_T"); getout(1); } STRCPY(p->vv_di.di_key, p->vv_name); if (p->vv_flags & VV_RO) p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; else if (p->vv_flags & VV_RO_SBX) p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX; else p->vv_di.di_flags = DI_FLAGS_FIX; // add to v: scope dict, unless the value is not always available if (p->vv_type != VAR_UNKNOWN) hash_add(&vimvarht, p->vv_di.di_key); if (p->vv_flags & VV_COMPAT) // add to compat scope dict hash_add(&compat_hashtab, p->vv_di.di_key); } vimvars[VV_VERSION].vv_nr = VIM_VERSION_100; vimvars[VV_VERSIONLONG].vv_nr = VIM_VERSION_100 * 10000 + highest_patch(); set_vim_var_nr(VV_SEARCHFORWARD, 1L); set_vim_var_nr(VV_HLSEARCH, 1L); set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc_lock(VAR_FIXED)); set_vim_var_list(VV_ERRORS, list_alloc()); set_vim_var_dict(VV_EVENT, dict_alloc_lock(VAR_FIXED)); set_vim_var_nr(VV_FALSE, VVAL_FALSE); set_vim_var_nr(VV_TRUE, VVAL_TRUE); set_vim_var_nr(VV_NONE, VVAL_NONE); set_vim_var_nr(VV_NULL, VVAL_NULL); set_vim_var_nr(VV_TYPE_NUMBER, VAR_TYPE_NUMBER); set_vim_var_nr(VV_TYPE_STRING, VAR_TYPE_STRING); set_vim_var_nr(VV_TYPE_FUNC, VAR_TYPE_FUNC); set_vim_var_nr(VV_TYPE_LIST, VAR_TYPE_LIST); set_vim_var_nr(VV_TYPE_DICT, VAR_TYPE_DICT); set_vim_var_nr(VV_TYPE_FLOAT, VAR_TYPE_FLOAT); set_vim_var_nr(VV_TYPE_BOOL, VAR_TYPE_BOOL); set_vim_var_nr(VV_TYPE_NONE, VAR_TYPE_NONE); set_vim_var_nr(VV_TYPE_JOB, VAR_TYPE_JOB); set_vim_var_nr(VV_TYPE_CHANNEL, VAR_TYPE_CHANNEL); set_vim_var_nr(VV_TYPE_BLOB, VAR_TYPE_BLOB); set_vim_var_nr(VV_ECHOSPACE, sc_col - 1); set_reg_var(0); // default for v:register is not 0 but '"' } #if defined(EXITFREE) || defined(PROTO) /* * Free all vim variables information on exit */ void evalvars_clear(void) { int i; struct vimvar *p; for (i = 0; i < VV_LEN; ++i) { p = &vimvars[i]; if (p->vv_di.di_tv.v_type == VAR_STRING) VIM_CLEAR(p->vv_str); else if (p->vv_di.di_tv.v_type == VAR_LIST) { list_unref(p->vv_list); p->vv_list = NULL; } } hash_clear(&vimvarht); hash_init(&vimvarht); // garbage_collect() will access it hash_clear(&compat_hashtab); // global variables vars_clear(&globvarht); // Script-local variables. First clear all the variables and in a second // loop free the scriptvar_T, because a variable in one script might hold // a reference to the whole scope of another script. for (i = 1; i <= ga_scripts.ga_len; ++i) vars_clear(&SCRIPT_VARS(i)); for (i = 1; i <= ga_scripts.ga_len; ++i) vim_free(SCRIPT_SV(i)); ga_clear(&ga_scripts); } #endif int garbage_collect_globvars(int copyID) { return set_ref_in_ht(&globvarht, copyID, NULL); } int garbage_collect_vimvars(int copyID) { return set_ref_in_ht(&vimvarht, copyID, NULL); } int garbage_collect_scriptvars(int copyID) { int i; int abort = FALSE; for (i = 1; i <= ga_scripts.ga_len; ++i) abort = abort || set_ref_in_ht(&SCRIPT_VARS(i), copyID, NULL); return abort; } /* * Set an internal variable to a string value. Creates the variable if it does * not already exist. */ void set_internal_string_var(char_u *name, char_u *value) { char_u *val; typval_T *tvp; val = vim_strsave(value); if (val != NULL) { tvp = alloc_string_tv(val); if (tvp != NULL) { set_var(name, tvp, FALSE); free_tv(tvp); } } } int eval_charconvert( char_u *enc_from, char_u *enc_to, char_u *fname_from, char_u *fname_to) { int err = FALSE; set_vim_var_string(VV_CC_FROM, enc_from, -1); set_vim_var_string(VV_CC_TO, enc_to, -1); set_vim_var_string(VV_FNAME_IN, fname_from, -1); set_vim_var_string(VV_FNAME_OUT, fname_to, -1); if (eval_to_bool(p_ccv, &err, NULL, FALSE)) err = TRUE; set_vim_var_string(VV_CC_FROM, NULL, -1); set_vim_var_string(VV_CC_TO, NULL, -1); set_vim_var_string(VV_FNAME_IN, NULL, -1); set_vim_var_string(VV_FNAME_OUT, NULL, -1); if (err) return FAIL; return OK; } # if defined(FEAT_POSTSCRIPT) || defined(PROTO) int eval_printexpr(char_u *fname, char_u *args) { int err = FALSE; set_vim_var_string(VV_FNAME_IN, fname, -1); set_vim_var_string(VV_CMDARG, args, -1); if (eval_to_bool(p_pexpr, &err, NULL, FALSE)) err = TRUE; set_vim_var_string(VV_FNAME_IN, NULL, -1); set_vim_var_string(VV_CMDARG, NULL, -1); if (err) { mch_remove(fname); return FAIL; } return OK; } # endif # if defined(FEAT_DIFF) || defined(PROTO) void eval_diff( char_u *origfile, char_u *newfile, char_u *outfile) { int err = FALSE; set_vim_var_string(VV_FNAME_IN, origfile, -1); set_vim_var_string(VV_FNAME_NEW, newfile, -1); set_vim_var_string(VV_FNAME_OUT, outfile, -1); (void)eval_to_bool(p_dex, &err, NULL, FALSE); set_vim_var_string(VV_FNAME_IN, NULL, -1); set_vim_var_string(VV_FNAME_NEW, NULL, -1); set_vim_var_string(VV_FNAME_OUT, NULL, -1); } void eval_patch( char_u *origfile, char_u *difffile, char_u *outfile) { int err; set_vim_var_string(VV_FNAME_IN, origfile, -1); set_vim_var_string(VV_FNAME_DIFF, difffile, -1); set_vim_var_string(VV_FNAME_OUT, outfile, -1); (void)eval_to_bool(p_pex, &err, NULL, FALSE); set_vim_var_string(VV_FNAME_IN, NULL, -1); set_vim_var_string(VV_FNAME_DIFF, NULL, -1); set_vim_var_string(VV_FNAME_OUT, NULL, -1); } # endif #if defined(FEAT_SPELL) || defined(PROTO) /* * Evaluate an expression to a list with suggestions. * For the "expr:" part of 'spellsuggest'. * Returns NULL when there is an error. */ list_T * eval_spell_expr(char_u *badword, char_u *expr) { typval_T save_val; typval_T rettv; list_T *list = NULL; char_u *p = skipwhite(expr); // Set "v:val" to the bad word. prepare_vimvar(VV_VAL, &save_val); set_vim_var_string(VV_VAL, badword, -1); if (p_verbose == 0) ++emsg_off; if (eval1(&p, &rettv, TRUE) == OK) { if (rettv.v_type != VAR_LIST) clear_tv(&rettv); else list = rettv.vval.v_list; } if (p_verbose == 0) --emsg_off; clear_tv(get_vim_var_tv(VV_VAL)); restore_vimvar(VV_VAL, &save_val); return list; } /* * "list" is supposed to contain two items: a word and a number. Return the * word in "pp" and the number as the return value. * Return -1 if anything isn't right. * Used to get the good word and score from the eval_spell_expr() result. */ int get_spellword(list_T *list, char_u **pp) { listitem_T *li; li = list->lv_first; if (li == NULL) return -1; *pp = tv_get_string(&li->li_tv); li = li->li_next; if (li == NULL) return -1; return (int)tv_get_number(&li->li_tv); } #endif /* * Prepare v: variable "idx" to be used. * Save the current typeval in "save_tv" and clear it. * When not used yet add the variable to the v: hashtable. */ void prepare_vimvar(int idx, typval_T *save_tv) { *save_tv = vimvars[idx].vv_tv; vimvars[idx].vv_str = NULL; // don't free it now if (vimvars[idx].vv_type == VAR_UNKNOWN) hash_add(&vimvarht, vimvars[idx].vv_di.di_key); } /* * Restore v: variable "idx" to typeval "save_tv". * Note that the v: variable must have been cleared already. * When no longer defined, remove the variable from the v: hashtable. */ void restore_vimvar(int idx, typval_T *save_tv) { hashitem_T *hi; vimvars[idx].vv_tv = *save_tv; if (vimvars[idx].vv_type == VAR_UNKNOWN) { hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key); if (HASHITEM_EMPTY(hi)) internal_error("restore_vimvar()"); else hash_remove(&vimvarht, hi); } } /* * List Vim variables. */ static void list_vim_vars(int *first) { list_hashtable_vars(&vimvarht, "v:", FALSE, first); } /* * List script-local variables, if there is a script. */ static void list_script_vars(int *first) { if (current_sctx.sc_sid > 0 && current_sctx.sc_sid <= ga_scripts.ga_len) list_hashtable_vars(&SCRIPT_VARS(current_sctx.sc_sid), "s:", FALSE, first); } /* * Get a list of lines from a HERE document. The here document is a list of * lines surrounded by a marker. * cmd << {marker} * {line1} * {line2} * .... * {marker} * * The {marker} is a string. If the optional 'trim' word is supplied before the * marker, then the leading indentation before the lines (matching the * indentation in the 'cmd' line) is stripped. * Returns a List with {lines} or NULL. */ static list_T * heredoc_get(exarg_T *eap, char_u *cmd) { char_u *theline; char_u *marker; list_T *l; char_u *p; int marker_indent_len = 0; int text_indent_len = 0; char_u *text_indent = NULL; if (eap->getline == NULL) { emsg(_("E991: cannot use =<< here")); return NULL; } // Check for the optional 'trim' word before the marker cmd = skipwhite(cmd); if (STRNCMP(cmd, "trim", 4) == 0 && (cmd[4] == NUL || VIM_ISWHITE(cmd[4]))) { cmd = skipwhite(cmd + 4); // Trim the indentation from all the lines in the here document. // The amount of indentation trimmed is the same as the indentation of // the first line after the :let command line. To find the end marker // the indent of the :let command line is trimmed. p = *eap->cmdlinep; while (VIM_ISWHITE(*p)) { p++; marker_indent_len++; } text_indent_len = -1; } // The marker is the next word. if (*cmd != NUL && *cmd != '"') { marker = skipwhite(cmd); p = skiptowhite(marker); if (*skipwhite(p) != NUL && *skipwhite(p) != '"') { emsg(_(e_trailing)); return NULL; } *p = NUL; if (vim_islower(*marker)) { emsg(_("E221: Marker cannot start with lower case letter")); return NULL; } } else { emsg(_("E172: Missing marker")); return NULL; } l = list_alloc(); if (l == NULL) return NULL; for (;;) { int mi = 0; int ti = 0; theline = eap->getline(NUL, eap->cookie, 0, FALSE); if (theline == NULL) { semsg(_("E990: Missing end marker '%s'"), marker); break; } // with "trim": skip the indent matching the :let line to find the // marker if (marker_indent_len > 0 && STRNCMP(theline, *eap->cmdlinep, marker_indent_len) == 0) mi = marker_indent_len; if (STRCMP(marker, theline + mi) == 0) { vim_free(theline); break; } if (text_indent_len == -1 && *theline != NUL) { // set the text indent from the first line. p = theline; text_indent_len = 0; while (VIM_ISWHITE(*p)) { p++; text_indent_len++; } text_indent = vim_strnsave(theline, text_indent_len); } // with "trim": skip the indent matching the first line if (text_indent != NULL) for (ti = 0; ti < text_indent_len; ++ti) if (theline[ti] != text_indent[ti]) break; if (list_append_string(l, theline + ti, -1) == FAIL) break; vim_free(theline); } vim_free(text_indent); return l; } /* * ":let" list all variable values * ":let var1 var2" list variable values * ":let var = expr" assignment command. * ":let var += expr" assignment command. * ":let var -= expr" assignment command. * ":let var *= expr" assignment command. * ":let var /= expr" assignment command. * ":let var %= expr" assignment command. * ":let var .= expr" assignment command. * ":let var ..= expr" assignment command. * ":let [var1, var2] = expr" unpack list. */ void ex_let(exarg_T *eap) { ex_let_const(eap, FALSE); } /* * ":const" list all variable values * ":const var1 var2" list variable values * ":const var = expr" assignment command. * ":const [var1, var2] = expr" unpack list. */ void ex_const(exarg_T *eap) { ex_let_const(eap, TRUE); } static void ex_let_const(exarg_T *eap, int is_const) { char_u *arg = eap->arg; char_u *expr = NULL; typval_T rettv; int i; int var_count = 0; int semicolon = 0; char_u op[2]; char_u *argend; int first = TRUE; int concat; argend = skip_var_list(arg, &var_count, &semicolon); if (argend == NULL) return; if (argend > arg && argend[-1] == '.') // for var.='str' --argend; expr = skipwhite(argend); concat = expr[0] == '.' && ((expr[1] == '=' && current_sctx.sc_version < 2) || (expr[1] == '.' && expr[2] == '=')); if (*expr != '=' && !((vim_strchr((char_u *)"+-*/%", *expr) != NULL && expr[1] == '=') || concat)) { // ":let" without "=": list variables if (*arg == '[') emsg(_(e_invarg)); else if (expr[0] == '.') emsg(_("E985: .= is not supported with script version 2")); else if (!ends_excmd(*arg)) // ":let var1 var2" arg = list_arg_vars(eap, arg, &first); else if (!eap->skip) { // ":let" list_glob_vars(&first); list_buf_vars(&first); list_win_vars(&first); list_tab_vars(&first); list_script_vars(&first); list_func_vars(&first); list_vim_vars(&first); } eap->nextcmd = check_nextcmd(arg); } else if (expr[0] == '=' && expr[1] == '<' && expr[2] == '<') { list_T *l; // HERE document l = heredoc_get(eap, expr + 3); if (l != NULL) { rettv_list_set(&rettv, l); op[0] = '='; op[1] = NUL; (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count, is_const, op); clear_tv(&rettv); } } else { op[0] = '='; op[1] = NUL; if (*expr != '=') { if (vim_strchr((char_u *)"+-*/%.", *expr) != NULL) { op[0] = *expr; // +=, -=, *=, /=, %= or .= if (expr[0] == '.' && expr[1] == '.') // ..= ++expr; } expr = skipwhite(expr + 2); } else expr = skipwhite(expr + 1); if (eap->skip) ++emsg_skip; i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip); if (eap->skip) { if (i != FAIL) clear_tv(&rettv); --emsg_skip; } else if (i != FAIL) { (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count, is_const, op); clear_tv(&rettv); } } } /* * Assign the typevalue "tv" to the variable or variables at "arg_start". * Handles both "var" with any type and "[var, var; var]" with a list type. * When "op" is not NULL it points to a string with characters that * must appear after the variable(s). Use "+", "-" or "." for add, subtract * or concatenate. * Returns OK or FAIL; */ int ex_let_vars( char_u *arg_start, typval_T *tv, int copy, // copy values from "tv", don't move int semicolon, // from skip_var_list() int var_count, // from skip_var_list() int is_const, // lock variables for const char_u *op) { char_u *arg = arg_start; list_T *l; int i; listitem_T *item; typval_T ltv; if (*arg != '[') { // ":let var = expr" or ":for var in list" if (ex_let_one(arg, tv, copy, is_const, op, op) == NULL) return FAIL; return OK; } // ":let [v1, v2] = list" or ":for [v1, v2] in listlist" if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL) { emsg(_(e_listreq)); return FAIL; } i = list_len(l); if (semicolon == 0 && var_count < i) { emsg(_("E687: Less targets than List items")); return FAIL; } if (var_count - semicolon > i) { emsg(_("E688: More targets than List items")); return FAIL; } item = l->lv_first; while (*arg != ']') { arg = skipwhite(arg + 1); arg = ex_let_one(arg, &item->li_tv, TRUE, is_const, (char_u *)",;]", op); item = item->li_next; if (arg == NULL) return FAIL; arg = skipwhite(arg); if (*arg == ';') { // Put the rest of the list (may be empty) in the var after ';'. // Create a new list for this. l = list_alloc(); if (l == NULL) return FAIL; while (item != NULL) { list_append_tv(l, &item->li_tv); item = item->li_next; } ltv.v_type = VAR_LIST; ltv.v_lock = 0; ltv.vval.v_list = l; l->lv_refcount = 1; arg = ex_let_one(skipwhite(arg + 1), <v, FALSE, is_const, (char_u *)"]", op); clear_tv(<v); if (arg == NULL) return FAIL; break; } else if (*arg != ',' && *arg != ']') { internal_error("ex_let_vars()"); return FAIL; } } return OK; } /* * Skip over assignable variable "var" or list of variables "[var, var]". * Used for ":let varvar = expr" and ":for varvar in expr". * For "[var, var]" increment "*var_count" for each variable. * for "[var, var; var]" set "semicolon". * Return NULL for an error. */ char_u * skip_var_list( char_u *arg, int *var_count, int *semicolon) { char_u *p, *s; if (*arg == '[') { // "[var, var]": find the matching ']'. p = arg; for (;;) { p = skipwhite(p + 1); // skip whites after '[', ';' or ',' s = skip_var_one(p); if (s == p) { semsg(_(e_invarg2), p); return NULL; } ++*var_count; p = skipwhite(s); if (*p == ']') break; else if (*p == ';') { if (*semicolon == 1) { emsg(_("Double ; in list of variables")); return NULL; } *semicolon = 1; } else if (*p != ',') { semsg(_(e_invarg2), p); return NULL; } } return p + 1; } else return skip_var_one(arg); } /* * Skip one (assignable) variable name, including @r, $VAR, &option, d.key, * l[idx]. */ static char_u * skip_var_one(char_u *arg) { if (*arg == '@' && arg[1] != NUL) return arg + 2; return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START); } /* * List variables for hashtab "ht" with prefix "prefix". * If "empty" is TRUE also list NULL strings as empty strings. */ void list_hashtable_vars( hashtab_T *ht, char *prefix, int empty, int *first) { hashitem_T *hi; dictitem_T *di; int todo; char_u buf[IOSIZE]; todo = (int)ht->ht_used; for (hi = ht->ht_array; todo > 0 && !got_int; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; di = HI2DI(hi); // apply :filter /pat/ to variable name vim_strncpy((char_u *)buf, (char_u *)prefix, IOSIZE - 1); vim_strcat((char_u *)buf, di->di_key, IOSIZE); if (message_filtered(buf)) continue; if (empty || di->di_tv.v_type != VAR_STRING || di->di_tv.vval.v_string != NULL) list_one_var(di, prefix, first); } } } /* * List global variables. */ static void list_glob_vars(int *first) { list_hashtable_vars(&globvarht, "", TRUE, first); } /* * List buffer variables. */ static void list_buf_vars(int *first) { list_hashtable_vars(&curbuf->b_vars->dv_hashtab, "b:", TRUE, first); } /* * List window variables. */ static void list_win_vars(int *first) { list_hashtable_vars(&curwin->w_vars->dv_hashtab, "w:", TRUE, first); } /* * List tab page variables. */ static void list_tab_vars(int *first) { list_hashtable_vars(&curtab->tp_vars->dv_hashtab, "t:", TRUE, first); } /* * List variables in "arg". */ static char_u * list_arg_vars(exarg_T *eap, char_u *arg, int *first) { int error = FALSE; int len; char_u *name; char_u *name_start; char_u *arg_subsc; char_u *tofree; typval_T tv; while (!ends_excmd(*arg) && !got_int) { if (error || eap->skip) { arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START); if (!VIM_ISWHITE(*arg) && !ends_excmd(*arg)) { emsg_severe = TRUE; emsg(_(e_trailing)); break; } } else { // get_name_len() takes care of expanding curly braces name_start = name = arg; len = get_name_len(&arg, &tofree, TRUE, TRUE); if (len <= 0) { // This is mainly to keep test 49 working: when expanding // curly braces fails overrule the exception error message. if (len < 0 && !aborting()) { emsg_severe = TRUE; semsg(_(e_invarg2), arg); break; } error = TRUE; } else { if (tofree != NULL) name = tofree; if (get_var_tv(name, len, &tv, NULL, TRUE, FALSE) == FAIL) error = TRUE; else { // handle d.key, l[idx], f(expr) arg_subsc = arg; if (handle_subscript(&arg, &tv, TRUE, TRUE, name, &name) == FAIL) error = TRUE; else { if (arg == arg_subsc && len == 2 && name[1] == ':') { switch (*name) { case 'g': list_glob_vars(first); break; case 'b': list_buf_vars(first); break; case 'w': list_win_vars(first); break; case 't': list_tab_vars(first); break; case 'v': list_vim_vars(first); break; case 's': list_script_vars(first); break; case 'l': list_func_vars(first); break; default: semsg(_("E738: Can't list variables for %s"), name); } } else { char_u numbuf[NUMBUFLEN]; char_u *tf; int c; char_u *s; s = echo_string(&tv, &tf, numbuf, 0); c = *arg; *arg = NUL; list_one_var_a("", arg == arg_subsc ? name : name_start, tv.v_type, s == NULL ? (char_u *)"" : s, first); *arg = c; vim_free(tf); } clear_tv(&tv); } } } vim_free(tofree); } arg = skipwhite(arg); } return arg; } /* * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value. * Returns a pointer to the char just after the var name. * Returns NULL if there is an error. */ static char_u * ex_let_one( char_u *arg, // points to variable name typval_T *tv, // value to assign to variable int copy, // copy value from "tv" int is_const, // lock variable for const char_u *endchars, // valid chars after variable name or NULL char_u *op) // "+", "-", "." or NULL { int c1; char_u *name; char_u *p; char_u *arg_end = NULL; int len; int opt_flags; char_u *tofree = NULL; // ":let $VAR = expr": Set environment variable. if (*arg == '$') { if (is_const) { emsg(_("E996: Cannot lock an environment variable")); return NULL; } // Find the end of the name. ++arg; name = arg; len = get_env_len(&arg); if (len == 0) semsg(_(e_invarg2), name - 1); else { if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL) semsg(_(e_letwrong), op); else if (endchars != NULL && vim_strchr(endchars, *skipwhite(arg)) == NULL) emsg(_(e_letunexp)); else if (!check_secure()) { c1 = name[len]; name[len] = NUL; p = tv_get_string_chk(tv); if (p != NULL && op != NULL && *op == '.') { int mustfree = FALSE; char_u *s = vim_getenv(name, &mustfree); if (s != NULL) { p = tofree = concat_str(s, p); if (mustfree) vim_free(s); } } if (p != NULL) { vim_setenv(name, p); if (STRICMP(name, "HOME") == 0) init_homedir(); else if (didset_vim && STRICMP(name, "VIM") == 0) didset_vim = FALSE; else if (didset_vimruntime && STRICMP(name, "VIMRUNTIME") == 0) didset_vimruntime = FALSE; arg_end = arg; } name[len] = c1; vim_free(tofree); } } } // ":let &option = expr": Set option value. // ":let &l:option = expr": Set local option value. // ":let &g:option = expr": Set global option value. else if (*arg == '&') { if (is_const) { emsg(_("E996: Cannot lock an option")); return NULL; } // Find the end of the name. p = find_option_end(&arg, &opt_flags); if (p == NULL || (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)) emsg(_(e_letunexp)); else { long n; int opt_type; long numval; char_u *stringval = NULL; char_u *s; c1 = *p; *p = NUL; n = (long)tv_get_number(tv); s = tv_get_string_chk(tv); // != NULL if number or string if (s != NULL && op != NULL && *op != '=') { opt_type = get_option_value(arg, &numval, &stringval, opt_flags); if ((opt_type == 1 && *op == '.') || (opt_type == 0 && *op != '.')) { semsg(_(e_letwrong), op); s = NULL; // don't set the value } else { if (opt_type == 1) // number { switch (*op) { case '+': n = numval + n; break; case '-': n = numval - n; break; case '*': n = numval * n; break; case '/': n = (long)num_divide(numval, n); break; case '%': n = (long)num_modulus(numval, n); break; } } else if (opt_type == 0 && stringval != NULL) // string { s = concat_str(stringval, s); vim_free(stringval); stringval = s; } } } if (s != NULL) { set_option_value(arg, n, s, opt_flags); arg_end = p; } *p = c1; vim_free(stringval); } } // ":let @r = expr": Set register contents. else if (*arg == '@') { if (is_const) { emsg(_("E996: Cannot lock a register")); return NULL; } ++arg; if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL) semsg(_(e_letwrong), op); else if (endchars != NULL && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL) emsg(_(e_letunexp)); else { char_u *ptofree = NULL; char_u *s; p = tv_get_string_chk(tv); if (p != NULL && op != NULL && *op == '.') { s = get_reg_contents(*arg == '@' ? '"' : *arg, GREG_EXPR_SRC); if (s != NULL) { p = ptofree = concat_str(s, p); vim_free(s); } } if (p != NULL) { write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE); arg_end = arg + 1; } vim_free(ptofree); } } // ":let var = expr": Set internal variable. // ":let {expr} = expr": Idem, name made with curly braces else if (eval_isnamec1(*arg) || *arg == '{') { lval_T lv; p = get_lval(arg, tv, &lv, FALSE, FALSE, 0, FNE_CHECK_START); if (p != NULL && lv.ll_name != NULL) { if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL) emsg(_(e_letunexp)); else { set_var_lval(&lv, p, tv, copy, is_const, op); arg_end = p; } } clear_lval(&lv); } else semsg(_(e_invarg2), arg); return arg_end; } /* * ":unlet[!] var1 ... " command. */ void ex_unlet(exarg_T *eap) { ex_unletlock(eap, eap->arg, 0); } /* * ":lockvar" and ":unlockvar" commands */ void ex_lockvar(exarg_T *eap) { char_u *arg = eap->arg; int deep = 2; if (eap->forceit) deep = -1; else if (vim_isdigit(*arg)) { deep = getdigits(&arg); arg = skipwhite(arg); } ex_unletlock(eap, arg, deep); } /* * ":unlet", ":lockvar" and ":unlockvar" are quite similar. */ static void ex_unletlock( exarg_T *eap, char_u *argstart, int deep) { char_u *arg = argstart; char_u *name_end; int error = FALSE; lval_T lv; do { if (*arg == '$') { char_u *name = ++arg; if (get_env_len(&arg) == 0) { semsg(_(e_invarg2), name - 1); return; } vim_unsetenv(name); arg = skipwhite(arg); continue; } // Parse the name and find the end. name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, 0, FNE_CHECK_START); if (lv.ll_name == NULL) error = TRUE; // error but continue parsing if (name_end == NULL || (!VIM_ISWHITE(*name_end) && !ends_excmd(*name_end))) { if (name_end != NULL) { emsg_severe = TRUE; emsg(_(e_trailing)); } if (!(eap->skip || error)) clear_lval(&lv); break; } if (!error && !eap->skip) { if (eap->cmdidx == CMD_unlet) { if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL) error = TRUE; } else { if (do_lock_var(&lv, name_end, deep, eap->cmdidx == CMD_lockvar) == FAIL) error = TRUE; } } if (!eap->skip) clear_lval(&lv); arg = skipwhite(name_end); } while (!ends_excmd(*arg)); eap->nextcmd = check_nextcmd(arg); } static int do_unlet_var( lval_T *lp, char_u *name_end, int forceit) { int ret = OK; int cc; if (lp->ll_tv == NULL) { cc = *name_end; *name_end = NUL; // Normal name or expanded name. if (do_unlet(lp->ll_name, forceit) == FAIL) ret = FAIL; *name_end = cc; } else if ((lp->ll_list != NULL && var_check_lock(lp->ll_list->lv_lock, lp->ll_name, FALSE)) || (lp->ll_dict != NULL && var_check_lock(lp->ll_dict->dv_lock, lp->ll_name, FALSE))) return FAIL; else if (lp->ll_range) { listitem_T *li; listitem_T *ll_li = lp->ll_li; int ll_n1 = lp->ll_n1; while (ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= ll_n1)) { li = ll_li->li_next; if (var_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE)) return FAIL; ll_li = li; ++ll_n1; } // Delete a range of List items. while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1)) { li = lp->ll_li->li_next; listitem_remove(lp->ll_list, lp->ll_li); lp->ll_li = li; ++lp->ll_n1; } } else { if (lp->ll_list != NULL) // unlet a List item. listitem_remove(lp->ll_list, lp->ll_li); else // unlet a Dictionary item. dictitem_remove(lp->ll_dict, lp->ll_di); } return ret; } /* * "unlet" a variable. Return OK if it existed, FAIL if not. * When "forceit" is TRUE don't complain if the variable doesn't exist. */ int do_unlet(char_u *name, int forceit) { hashtab_T *ht; hashitem_T *hi; char_u *varname; dict_T *d; dictitem_T *di; ht = find_var_ht(name, &varname); if (ht != NULL && *varname != NUL) { d = get_current_funccal_dict(ht); if (d == NULL) { if (ht == &globvarht) d = &globvardict; else if (ht == &compat_hashtab) d = &vimvardict; else { di = find_var_in_ht(ht, *name, (char_u *)"", FALSE); d = di == NULL ? NULL : di->di_tv.vval.v_dict; } if (d == NULL) { internal_error("do_unlet()"); return FAIL; } } hi = hash_find(ht, varname); if (HASHITEM_EMPTY(hi)) hi = find_hi_in_scoped_ht(name, &ht); if (hi != NULL && !HASHITEM_EMPTY(hi)) { di = HI2DI(hi); if (var_check_fixed(di->di_flags, name, FALSE) || var_check_ro(di->di_flags, name, FALSE) || var_check_lock(d->dv_lock, name, FALSE)) return FAIL; delete_var(ht, hi); return OK; } } if (forceit) return OK; semsg(_("E108: No such variable: \"%s\""), name); return FAIL; } /* * Lock or unlock variable indicated by "lp". * "deep" is the levels to go (-1 for unlimited); * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar". */ static int do_lock_var( lval_T *lp, char_u *name_end, int deep, int lock) { int ret = OK; int cc; dictitem_T *di; if (deep == 0) // nothing to do return OK; if (lp->ll_tv == NULL) { cc = *name_end; *name_end = NUL; // Normal name or expanded name. di = find_var(lp->ll_name, NULL, TRUE); if (di == NULL) ret = FAIL; else if ((di->di_flags & DI_FLAGS_FIX) && di->di_tv.v_type != VAR_DICT && di->di_tv.v_type != VAR_LIST) // For historic reasons this error is not given for a list or dict. // E.g., the b: dict could be locked/unlocked. semsg(_("E940: Cannot lock or unlock variable %s"), lp->ll_name); else { if (lock) di->di_flags |= DI_FLAGS_LOCK; else di->di_flags &= ~DI_FLAGS_LOCK; item_lock(&di->di_tv, deep, lock); } *name_end = cc; } else if (lp->ll_range) { listitem_T *li = lp->ll_li; // (un)lock a range of List items. while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1)) { item_lock(&li->li_tv, deep, lock); li = li->li_next; ++lp->ll_n1; } } else if (lp->ll_list != NULL) // (un)lock a List item. item_lock(&lp->ll_li->li_tv, deep, lock); else // (un)lock a Dictionary item. item_lock(&lp->ll_di->di_tv, deep, lock); return ret; } /* * Lock or unlock an item. "deep" is nr of levels to go. */ static void item_lock(typval_T *tv, int deep, int lock) { static int recurse = 0; list_T *l; listitem_T *li; dict_T *d; blob_T *b; hashitem_T *hi; int todo; if (recurse >= DICT_MAXNEST) { emsg(_("E743: variable nested too deep for (un)lock")); return; } if (deep == 0) return; ++recurse; // lock/unlock the item itself if (lock) tv->v_lock |= VAR_LOCKED; else tv->v_lock &= ~VAR_LOCKED; switch (tv->v_type) { case VAR_UNKNOWN: case VAR_NUMBER: case VAR_STRING: case VAR_FUNC: case VAR_PARTIAL: case VAR_FLOAT: case VAR_SPECIAL: case VAR_JOB: case VAR_CHANNEL: break; case VAR_BLOB: if ((b = tv->vval.v_blob) != NULL) { if (lock) b->bv_lock |= VAR_LOCKED; else b->bv_lock &= ~VAR_LOCKED; } break; case VAR_LIST: if ((l = tv->vval.v_list) != NULL) { if (lock) l->lv_lock |= VAR_LOCKED; else l->lv_lock &= ~VAR_LOCKED; if (deep < 0 || deep > 1) // recursive: lock/unlock the items the List contains for (li = l->lv_first; li != NULL; li = li->li_next) item_lock(&li->li_tv, deep - 1, lock); } break; case VAR_DICT: if ((d = tv->vval.v_dict) != NULL) { if (lock) d->dv_lock |= VAR_LOCKED; else d->dv_lock &= ~VAR_LOCKED; if (deep < 0 || deep > 1) { // recursive: lock/unlock the items the List contains todo = (int)d->dv_hashtab.ht_used; for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; item_lock(&HI2DI(hi)->di_tv, deep - 1, lock); } } } } } --recurse; } #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO) /* * Delete all "menutrans_" variables. */ void del_menutrans_vars(void) { hashitem_T *hi; int todo; hash_lock(&globvarht); todo = (int)globvarht.ht_used; for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0) delete_var(&globvarht, hi); } } hash_unlock(&globvarht); } #endif /* * Local string buffer for the next two functions to store a variable name * with its prefix. Allocated in cat_prefix_varname(), freed later in * get_user_var_name(). */ static char_u *varnamebuf = NULL; static int varnamebuflen = 0; /* * Function to concatenate a prefix and a variable name. */ static char_u * cat_prefix_varname(int prefix, char_u *name) { int len; len = (int)STRLEN(name) + 3; if (len > varnamebuflen) { vim_free(varnamebuf); len += 10; // some additional space varnamebuf = alloc(len); if (varnamebuf == NULL) { varnamebuflen = 0; return NULL; } varnamebuflen = len; } *varnamebuf = prefix; varnamebuf[1] = ':'; STRCPY(varnamebuf + 2, name); return varnamebuf; } /* * Function given to ExpandGeneric() to obtain the list of user defined * (global/buffer/window/built-in) variable names. */ char_u * get_user_var_name(expand_T *xp, int idx) { static long_u gdone; static long_u bdone; static long_u wdone; static long_u tdone; static int vidx; static hashitem_T *hi; hashtab_T *ht; if (idx == 0) { gdone = bdone = wdone = vidx = 0; tdone = 0; } // Global variables if (gdone < globvarht.ht_used) { if (gdone++ == 0) hi = globvarht.ht_array; else ++hi; while (HASHITEM_EMPTY(hi)) ++hi; if (STRNCMP("g:", xp->xp_pattern, 2) == 0) return cat_prefix_varname('g', hi->hi_key); return hi->hi_key; } // b: variables ht = &curbuf->b_vars->dv_hashtab; if (bdone < ht->ht_used) { if (bdone++ == 0) hi = ht->ht_array; else ++hi; while (HASHITEM_EMPTY(hi)) ++hi; return cat_prefix_varname('b', hi->hi_key); } // w: variables ht = &curwin->w_vars->dv_hashtab; if (wdone < ht->ht_used) { if (wdone++ == 0) hi = ht->ht_array; else ++hi; while (HASHITEM_EMPTY(hi)) ++hi; return cat_prefix_varname('w', hi->hi_key); } // t: variables ht = &curtab->tp_vars->dv_hashtab; if (tdone < ht->ht_used) { if (tdone++ == 0) hi = ht->ht_array; else ++hi; while (HASHITEM_EMPTY(hi)) ++hi; return cat_prefix_varname('t', hi->hi_key); } // v: variables if (vidx < VV_LEN) return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name); VIM_CLEAR(varnamebuf); varnamebuflen = 0; return NULL; } char * get_var_special_name(int nr) { switch (nr) { case VVAL_FALSE: return "v:false"; case VVAL_TRUE: return "v:true"; case VVAL_NONE: return "v:none"; case VVAL_NULL: return "v:null"; } internal_error("get_var_special_name()"); return "42"; } /* * Returns the global variable dictionary */ dict_T * get_globvar_dict(void) { return &globvardict; } /* * Returns the global variable hash table */ hashtab_T * get_globvar_ht(void) { return &globvarht; } /* * Returns the v: variable dictionary */ dict_T * get_vimvar_dict(void) { return &vimvardict; } /* * Set type of v: variable to "type". */ void set_vim_var_type(int idx, vartype_T type) { vimvars[idx].vv_type = type; } /* * Set number v: variable to "val". * Note that this does not set the type, use set_vim_var_type() for that. */ void set_vim_var_nr(int idx, varnumber_T val) { vimvars[idx].vv_nr = val; } /* * Get typval_T v: variable value. */ typval_T * get_vim_var_tv(int idx) { return &vimvars[idx].vv_tv; } /* * Get number v: variable value. */ varnumber_T get_vim_var_nr(int idx) { return vimvars[idx].vv_nr; } /* * Get string v: variable value. Uses a static buffer, can only be used once. * If the String variable has never been set, return an empty string. * Never returns NULL; */ char_u * get_vim_var_str(int idx) { return tv_get_string(&vimvars[idx].vv_tv); } /* * Get List v: variable value. Caller must take care of reference count when * needed. */ list_T * get_vim_var_list(int idx) { return vimvars[idx].vv_list; } /* * Get Dict v: variable value. Caller must take care of reference count when * needed. */ dict_T * get_vim_var_dict(int idx) { return vimvars[idx].vv_dict; } /* * Set v:char to character "c". */ void set_vim_var_char(int c) { char_u buf[MB_MAXBYTES + 1]; if (has_mbyte) buf[(*mb_char2bytes)(c, buf)] = NUL; else { buf[0] = c; buf[1] = NUL; } set_vim_var_string(VV_CHAR, buf, -1); } /* * Set v:count to "count" and v:count1 to "count1". * When "set_prevcount" is TRUE first set v:prevcount from v:count. */ void set_vcount( long count, long count1, int set_prevcount) { if (set_prevcount) vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr; vimvars[VV_COUNT].vv_nr = count; vimvars[VV_COUNT1].vv_nr = count1; } /* * Save variables that might be changed as a side effect. Used when executing * a timer callback. */ void save_vimvars(vimvars_save_T *vvsave) { vvsave->vv_prevcount = vimvars[VV_PREVCOUNT].vv_nr; vvsave->vv_count = vimvars[VV_COUNT].vv_nr; vvsave->vv_count1 = vimvars[VV_COUNT1].vv_nr; } /* * Restore variables saved by save_vimvars(). */ void restore_vimvars(vimvars_save_T *vvsave) { vimvars[VV_PREVCOUNT].vv_nr = vvsave->vv_prevcount; vimvars[VV_COUNT].vv_nr = vvsave->vv_count; vimvars[VV_COUNT1].vv_nr = vvsave->vv_count1; } /* * Set string v: variable to a copy of "val". If 'copy' is FALSE, then set the * value. */ void set_vim_var_string( int idx, char_u *val, int len) // length of "val" to use or -1 (whole string) { clear_tv(&vimvars[idx].vv_di.di_tv); vimvars[idx].vv_type = VAR_STRING; if (val == NULL) vimvars[idx].vv_str = NULL; else if (len == -1) vimvars[idx].vv_str = vim_strsave(val); else vimvars[idx].vv_str = vim_strnsave(val, len); } /* * Set List v: variable to "val". */ void set_vim_var_list(int idx, list_T *val) { clear_tv(&vimvars[idx].vv_di.di_tv); vimvars[idx].vv_type = VAR_LIST; vimvars[idx].vv_list = val; if (val != NULL) ++val->lv_refcount; } /* * Set Dictionary v: variable to "val". */ void set_vim_var_dict(int idx, dict_T *val) { clear_tv(&vimvars[idx].vv_di.di_tv); vimvars[idx].vv_type = VAR_DICT; vimvars[idx].vv_dict = val; if (val != NULL) { ++val->dv_refcount; dict_set_items_ro(val); } } /* * Set v:register if needed. */ void set_reg_var(int c) { char_u regname; if (c == 0 || c == ' ') regname = '"'; else regname = c; // Avoid free/alloc when the value is already right. if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c) set_vim_var_string(VV_REG, ®name, 1); } /* * Get or set v:exception. If "oldval" == NULL, return the current value. * Otherwise, restore the value to "oldval" and return NULL. * Must always be called in pairs to save and restore v:exception! Does not * take care of memory allocations. */ char_u * v_exception(char_u *oldval) { if (oldval == NULL) return vimvars[VV_EXCEPTION].vv_str; vimvars[VV_EXCEPTION].vv_str = oldval; return NULL; } /* * Get or set v:throwpoint. If "oldval" == NULL, return the current value. * Otherwise, restore the value to "oldval" and return NULL. * Must always be called in pairs to save and restore v:throwpoint! Does not * take care of memory allocations. */ char_u * v_throwpoint(char_u *oldval) { if (oldval == NULL) return vimvars[VV_THROWPOINT].vv_str; vimvars[VV_THROWPOINT].vv_str = oldval; return NULL; } /* * Set v:cmdarg. * If "eap" != NULL, use "eap" to generate the value and return the old value. * If "oldarg" != NULL, restore the value to "oldarg" and return NULL. * Must always be called in pairs! */ char_u * set_cmdarg(exarg_T *eap, char_u *oldarg) { char_u *oldval; char_u *newval; unsigned len; oldval = vimvars[VV_CMDARG].vv_str; if (eap == NULL) { vim_free(oldval); vimvars[VV_CMDARG].vv_str = oldarg; return NULL; } if (eap->force_bin == FORCE_BIN) len = 6; else if (eap->force_bin == FORCE_NOBIN) len = 8; else len = 0; if (eap->read_edit) len += 7; if (eap->force_ff != 0) len += 10; // " ++ff=unix" if (eap->force_enc != 0) len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7; if (eap->bad_char != 0) len += 7 + 4; // " ++bad=" + "keep" or "drop" newval = alloc(len + 1); if (newval == NULL) return NULL; if (eap->force_bin == FORCE_BIN) sprintf((char *)newval, " ++bin"); else if (eap->force_bin == FORCE_NOBIN) sprintf((char *)newval, " ++nobin"); else *newval = NUL; if (eap->read_edit) STRCAT(newval, " ++edit"); if (eap->force_ff != 0) sprintf((char *)newval + STRLEN(newval), " ++ff=%s", eap->force_ff == 'u' ? "unix" : eap->force_ff == 'd' ? "dos" : "mac"); if (eap->force_enc != 0) sprintf((char *)newval + STRLEN(newval), " ++enc=%s", eap->cmd + eap->force_enc); if (eap->bad_char == BAD_KEEP) STRCPY(newval + STRLEN(newval), " ++bad=keep"); else if (eap->bad_char == BAD_DROP) STRCPY(newval + STRLEN(newval), " ++bad=drop"); else if (eap->bad_char != 0) sprintf((char *)newval + STRLEN(newval), " ++bad=%c", eap->bad_char); vimvars[VV_CMDARG].vv_str = newval; return oldval; } /* * Get the value of internal variable "name". * Return OK or FAIL. If OK is returned "rettv" must be cleared. */ int get_var_tv( char_u *name, int len, // length of "name" typval_T *rettv, // NULL when only checking existence dictitem_T **dip, // non-NULL when typval's dict item is needed int verbose, // may give error message int no_autoload) // do not use script autoloading { int ret = OK; typval_T *tv = NULL; dictitem_T *v; int cc; // truncate the name, so that we can use strcmp() cc = name[len]; name[len] = NUL; // Check for user-defined variables. v = find_var(name, NULL, no_autoload); if (v != NULL) { tv = &v->di_tv; if (dip != NULL) *dip = v; } if (tv == NULL) { if (rettv != NULL && verbose) semsg(_(e_undefvar), name); ret = FAIL; } else if (rettv != NULL) copy_tv(tv, rettv); name[len] = cc; return ret; } /* * Check if variable "name[len]" is a local variable or an argument. * If so, "*eval_lavars_used" is set to TRUE. */ void check_vars(char_u *name, int len) { int cc; char_u *varname; hashtab_T *ht; if (eval_lavars_used == NULL) return; // truncate the name, so that we can use strcmp() cc = name[len]; name[len] = NUL; ht = find_var_ht(name, &varname); if (ht == get_funccal_local_ht() || ht == get_funccal_args_ht()) { if (find_var(name, NULL, TRUE) != NULL) *eval_lavars_used = TRUE; } name[len] = cc; } /* * Find variable "name" in the list of variables. * Return a pointer to it if found, NULL if not found. * Careful: "a:0" variables don't have a name. * When "htp" is not NULL we are writing to the variable, set "htp" to the * hashtab_T used. */ dictitem_T * find_var(char_u *name, hashtab_T **htp, int no_autoload) { char_u *varname; hashtab_T *ht; dictitem_T *ret = NULL; ht = find_var_ht(name, &varname); if (htp != NULL) *htp = ht; if (ht == NULL) return NULL; ret = find_var_in_ht(ht, *name, varname, no_autoload || htp != NULL); if (ret != NULL) return ret; // Search in parent scope for lambda return find_var_in_scoped_ht(name, no_autoload || htp != NULL); } /* * Find variable "varname" in hashtab "ht" with name "htname". * Returns NULL if not found. */ dictitem_T * find_var_in_ht( hashtab_T *ht, int htname, char_u *varname, int no_autoload) { hashitem_T *hi; if (*varname == NUL) { // Must be something like "s:", otherwise "ht" would be NULL. switch (htname) { case 's': return &SCRIPT_SV(current_sctx.sc_sid)->sv_var; case 'g': return &globvars_var; case 'v': return &vimvars_var; case 'b': return &curbuf->b_bufvar; case 'w': return &curwin->w_winvar; case 't': return &curtab->tp_winvar; case 'l': return get_funccal_local_var(); case 'a': return get_funccal_args_var(); } return NULL; } hi = hash_find(ht, varname); if (HASHITEM_EMPTY(hi)) { // For global variables we may try auto-loading the script. If it // worked find the variable again. Don't auto-load a script if it was // loaded already, otherwise it would be loaded every time when // checking if a function name is a Funcref variable. if (ht == &globvarht && !no_autoload) { // Note: script_autoload() may make "hi" invalid. It must either // be obtained again or not used. if (!script_autoload(varname, FALSE) || aborting()) return NULL; hi = hash_find(ht, varname); } if (HASHITEM_EMPTY(hi)) return NULL; } return HI2DI(hi); } /* * Find the hashtab used for a variable name. * Return NULL if the name is not valid. * Set "varname" to the start of name without ':'. */ hashtab_T * find_var_ht(char_u *name, char_u **varname) { hashitem_T *hi; hashtab_T *ht; if (name[0] == NUL) return NULL; if (name[1] != ':') { // The name must not start with a colon or #. if (name[0] == ':' || name[0] == AUTOLOAD_CHAR) return NULL; *varname = name; // "version" is "v:version" in all scopes if scriptversion < 3. // Same for a few other variables marked with VV_COMPAT. if (current_sctx.sc_version < 3) { hi = hash_find(&compat_hashtab, name); if (!HASHITEM_EMPTY(hi)) return &compat_hashtab; } ht = get_funccal_local_ht(); if (ht == NULL) return &globvarht; // global variable return ht; // local variable } *varname = name + 2; if (*name == 'g') // global variable return &globvarht; // There must be no ':' or '#' in the rest of the name, unless g: is used if (vim_strchr(name + 2, ':') != NULL || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL) return NULL; if (*name == 'b') // buffer variable return &curbuf->b_vars->dv_hashtab; if (*name == 'w') // window variable return &curwin->w_vars->dv_hashtab; if (*name == 't') // tab page variable return &curtab->tp_vars->dv_hashtab; if (*name == 'v') // v: variable return &vimvarht; if (*name == 'a') // a: function argument return get_funccal_args_ht(); if (*name == 'l') // l: local function variable return get_funccal_local_ht(); if (*name == 's' // script variable && current_sctx.sc_sid > 0 && current_sctx.sc_sid <= ga_scripts.ga_len) return &SCRIPT_VARS(current_sctx.sc_sid); return NULL; } /* * Get the string value of a (global/local) variable. * Note: see tv_get_string() for how long the pointer remains valid. * Returns NULL when it doesn't exist. */ char_u * get_var_value(char_u *name) { dictitem_T *v; v = find_var(name, NULL, FALSE); if (v == NULL) return NULL; return tv_get_string(&v->di_tv); } /* * Allocate a new hashtab for a sourced script. It will be used while * sourcing this script and when executing functions defined in the script. */ void new_script_vars(scid_T id) { int i; hashtab_T *ht; scriptvar_T *sv; if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK) { // Re-allocating ga_data means that an ht_array pointing to // ht_smallarray becomes invalid. We can recognize this: ht_mask is // at its init value. Also reset "v_dict", it's always the same. for (i = 1; i <= ga_scripts.ga_len; ++i) { ht = &SCRIPT_VARS(i); if (ht->ht_mask == HT_INIT_SIZE - 1) ht->ht_array = ht->ht_smallarray; sv = SCRIPT_SV(i); sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict; } while (ga_scripts.ga_len < id) { sv = SCRIPT_SV(ga_scripts.ga_len + 1) = ALLOC_CLEAR_ONE(scriptvar_T); init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE); ++ga_scripts.ga_len; } } } /* * Initialize dictionary "dict" as a scope and set variable "dict_var" to * point to it. */ void init_var_dict(dict_T *dict, dictitem_T *dict_var, int scope) { hash_init(&dict->dv_hashtab); dict->dv_lock = 0; dict->dv_scope = scope; dict->dv_refcount = DO_NOT_FREE_CNT; dict->dv_copyID = 0; dict_var->di_tv.vval.v_dict = dict; dict_var->di_tv.v_type = VAR_DICT; dict_var->di_tv.v_lock = VAR_FIXED; dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX; dict_var->di_key[0] = NUL; } /* * Unreference a dictionary initialized by init_var_dict(). */ void unref_var_dict(dict_T *dict) { // Now the dict needs to be freed if no one else is using it, go back to // normal reference counting. dict->dv_refcount -= DO_NOT_FREE_CNT - 1; dict_unref(dict); } /* * Clean up a list of internal variables. * Frees all allocated variables and the value they contain. * Clears hashtab "ht", does not free it. */ void vars_clear(hashtab_T *ht) { vars_clear_ext(ht, TRUE); } /* * Like vars_clear(), but only free the value if "free_val" is TRUE. */ void vars_clear_ext(hashtab_T *ht, int free_val) { int todo; hashitem_T *hi; dictitem_T *v; hash_lock(ht); todo = (int)ht->ht_used; for (hi = ht->ht_array; todo > 0; ++hi) { if (!HASHITEM_EMPTY(hi)) { --todo; // Free the variable. Don't remove it from the hashtab, // ht_array might change then. hash_clear() takes care of it // later. v = HI2DI(hi); if (free_val) clear_tv(&v->di_tv); if (v->di_flags & DI_FLAGS_ALLOC) vim_free(v); } } hash_clear(ht); ht->ht_used = 0; } /* * Delete a variable from hashtab "ht" at item "hi". * Clear the variable value and free the dictitem. */ static void delete_var(hashtab_T *ht, hashitem_T *hi) { dictitem_T *di = HI2DI(hi); hash_remove(ht, hi); clear_tv(&di->di_tv); vim_free(di); } /* * List the value of one internal variable. */ static void list_one_var(dictitem_T *v, char *prefix, int *first) { char_u *tofree; char_u *s; char_u numbuf[NUMBUFLEN]; s = echo_string(&v->di_tv, &tofree, numbuf, get_copyID()); list_one_var_a(prefix, v->di_key, v->di_tv.v_type, s == NULL ? (char_u *)"" : s, first); vim_free(tofree); } static void list_one_var_a( char *prefix, char_u *name, int type, char_u *string, int *first) // when TRUE clear rest of screen and set to FALSE { // don't use msg() or msg_attr() to avoid overwriting "v:statusmsg" msg_start(); msg_puts(prefix); if (name != NULL) // "a:" vars don't have a name stored msg_puts((char *)name); msg_putchar(' '); msg_advance(22); if (type == VAR_NUMBER) msg_putchar('#'); else if (type == VAR_FUNC || type == VAR_PARTIAL) msg_putchar('*'); else if (type == VAR_LIST) { msg_putchar('['); if (*string == '[') ++string; } else if (type == VAR_DICT) { msg_putchar('{'); if (*string == '{') ++string; } else msg_putchar(' '); msg_outtrans(string); if (type == VAR_FUNC || type == VAR_PARTIAL) msg_puts("()"); if (*first) { msg_clr_eos(); *first = FALSE; } } /* * Set variable "name" to value in "tv". * If the variable already exists, the value is updated. * Otherwise the variable is created. */ void set_var( char_u *name, typval_T *tv, int copy) // make copy of value in "tv" { set_var_const(name, tv, copy, FALSE); } /* * Set variable "name" to value in "tv". * If the variable already exists and "is_const" is FALSE the value is updated. * Otherwise the variable is created. */ void set_var_const( char_u *name, typval_T *tv, int copy, // make copy of value in "tv" int is_const) // disallow to modify existing variable { dictitem_T *v; char_u *varname; hashtab_T *ht; ht = find_var_ht(name, &varname); if (ht == NULL || *varname == NUL) { semsg(_(e_illvar), name); return; } v = find_var_in_ht(ht, 0, varname, TRUE); // Search in parent scope which is possible to reference from lambda if (v == NULL) v = find_var_in_scoped_ht(name, TRUE); if ((tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL) && var_check_func_name(name, v == NULL)) return; if (v != NULL) { if (is_const) { emsg(_(e_cannot_mod)); return; } // existing variable, need to clear the value if (var_check_ro(v->di_flags, name, FALSE) || var_check_lock(v->di_tv.v_lock, name, FALSE)) return; // Handle setting internal v: variables separately where needed to // prevent changing the type. if (ht == &vimvarht) { if (v->di_tv.v_type == VAR_STRING) { VIM_CLEAR(v->di_tv.vval.v_string); if (copy || tv->v_type != VAR_STRING) { char_u *val = tv_get_string(tv); // Careful: when assigning to v:errmsg and tv_get_string() // causes an error message the variable will alrady be set. if (v->di_tv.vval.v_string == NULL) v->di_tv.vval.v_string = vim_strsave(val); } else { // Take over the string to avoid an extra alloc/free. v->di_tv.vval.v_string = tv->vval.v_string; tv->vval.v_string = NULL; } return; } else if (v->di_tv.v_type == VAR_NUMBER) { v->di_tv.vval.v_number = tv_get_number(tv); if (STRCMP(varname, "searchforward") == 0) set_search_direction(v->di_tv.vval.v_number ? '/' : '?'); #ifdef FEAT_SEARCH_EXTRA else if (STRCMP(varname, "hlsearch") == 0) { no_hlsearch = !v->di_tv.vval.v_number; redraw_all_later(SOME_VALID); } #endif return; } else if (v->di_tv.v_type != tv->v_type) { semsg(_("E963: setting %s to value with wrong type"), name); return; } } clear_tv(&v->di_tv); } else // add a new variable { // Can't add "v:" or "a:" variable. if (ht == &vimvarht || ht == get_funccal_args_ht()) { semsg(_(e_illvar), name); return; } // Make sure the variable name is valid. if (!valid_varname(varname)) return; v = alloc(sizeof(dictitem_T) + STRLEN(varname)); if (v == NULL) return; STRCPY(v->di_key, varname); if (hash_add(ht, DI2HIKEY(v)) == FAIL) { vim_free(v); return; } v->di_flags = DI_FLAGS_ALLOC; if (is_const) v->di_flags |= DI_FLAGS_LOCK; } if (copy || tv->v_type == VAR_NUMBER || tv->v_type == VAR_FLOAT) copy_tv(tv, &v->di_tv); else { v->di_tv = *tv; v->di_tv.v_lock = 0; init_tv(tv); } if (is_const) v->di_tv.v_lock |= VAR_LOCKED; } /* * Return TRUE if di_flags "flags" indicates variable "name" is read-only. * Also give an error message. */ int var_check_ro(int flags, char_u *name, int use_gettext) { if (flags & DI_FLAGS_RO) { semsg(_(e_readonlyvar), use_gettext ? (char_u *)_(name) : name); return TRUE; } if ((flags & DI_FLAGS_RO_SBX) && sandbox) { semsg(_(e_readonlysbx), use_gettext ? (char_u *)_(name) : name); return TRUE; } return FALSE; } /* * Return TRUE if di_flags "flags" indicates variable "name" is fixed. * Also give an error message. */ int var_check_fixed(int flags, char_u *name, int use_gettext) { if (flags & DI_FLAGS_FIX) { semsg(_("E795: Cannot delete variable %s"), use_gettext ? (char_u *)_(name) : name); return TRUE; } return FALSE; } /* * Check if a funcref is assigned to a valid variable name. * Return TRUE and give an error if not. */ int var_check_func_name( char_u *name, // points to start of variable name int new_var) // TRUE when creating the variable { // Allow for w: b: s: and t:. if (!(vim_strchr((char_u *)"wbst", name[0]) != NULL && name[1] == ':') && !ASCII_ISUPPER((name[0] != NUL && name[1] == ':') ? name[2] : name[0])) { semsg(_("E704: Funcref variable name must start with a capital: %s"), name); return TRUE; } // Don't allow hiding a function. When "v" is not NULL we might be // assigning another function to the same var, the type is checked // below. if (new_var && function_exists(name, FALSE)) { semsg(_("E705: Variable name conflicts with existing function: %s"), name); return TRUE; } return FALSE; } /* * Return TRUE if "flags" indicates variable "name" is locked (immutable). * Also give an error message, using "name" or _("name") when use_gettext is * TRUE. */ int var_check_lock(int lock, char_u *name, int use_gettext) { if (lock & VAR_LOCKED) { semsg(_("E741: Value is locked: %s"), name == NULL ? (char_u *)_("Unknown") : use_gettext ? (char_u *)_(name) : name); return TRUE; } if (lock & VAR_FIXED) { semsg(_("E742: Cannot change value of %s"), name == NULL ? (char_u *)_("Unknown") : use_gettext ? (char_u *)_(name) : name); return TRUE; } return FALSE; } /* * Check if a variable name is valid. * Return FALSE and give an error if not. */ int valid_varname(char_u *varname) { char_u *p; for (p = varname; *p != NUL; ++p) if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)) && *p != AUTOLOAD_CHAR) { semsg(_(e_illvar), varname); return FALSE; } return TRUE; } /* * getwinvar() and gettabwinvar() */ static void getwinvar( typval_T *argvars, typval_T *rettv, int off) // 1 for gettabwinvar() { win_T *win; char_u *varname; dictitem_T *v; tabpage_T *tp = NULL; int done = FALSE; win_T *oldcurwin; tabpage_T *oldtabpage; int need_switch_win; if (off == 1) tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL)); else tp = curtab; win = find_win_by_nr(&argvars[off], tp); varname = tv_get_string_chk(&argvars[off + 1]); ++emsg_off; rettv->v_type = VAR_STRING; rettv->vval.v_string = NULL; if (win != NULL && varname != NULL) { // Set curwin to be our win, temporarily. Also set the tabpage, // otherwise the window is not valid. Only do this when needed, // autocommands get blocked. need_switch_win = !(tp == curtab && win == curwin); if (!need_switch_win || switch_win(&oldcurwin, &oldtabpage, win, tp, TRUE) == OK) { if (*varname == '&') { if (varname[1] == NUL) { // get all window-local options in a dict dict_T *opts = get_winbuf_options(FALSE); if (opts != NULL) { rettv_dict_set(rettv, opts); done = TRUE; } } else if (get_option_tv(&varname, rettv, 1) == OK) // window-local-option done = TRUE; } else { // Look up the variable. // Let getwinvar({nr}, "") return the "w:" dictionary. v = find_var_in_ht(&win->w_vars->dv_hashtab, 'w', varname, FALSE); if (v != NULL) { copy_tv(&v->di_tv, rettv); done = TRUE; } } } if (need_switch_win) // restore previous notion of curwin restore_win(oldcurwin, oldtabpage, TRUE); } if (!done && argvars[off + 2].v_type != VAR_UNKNOWN) // use the default return value copy_tv(&argvars[off + 2], rettv); --emsg_off; } /* * "setwinvar()" and "settabwinvar()" functions */ static void setwinvar(typval_T *argvars, typval_T *rettv UNUSED, int off) { win_T *win; win_T *save_curwin; tabpage_T *save_curtab; int need_switch_win; char_u *varname, *winvarname; typval_T *varp; char_u nbuf[NUMBUFLEN]; tabpage_T *tp = NULL; if (check_secure()) return; if (off == 1) tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL)); else tp = curtab; win = find_win_by_nr(&argvars[off], tp); varname = tv_get_string_chk(&argvars[off + 1]); varp = &argvars[off + 2]; if (win != NULL && varname != NULL && varp != NULL) { need_switch_win = !(tp == curtab && win == curwin); if (!need_switch_win || switch_win(&save_curwin, &save_curtab, win, tp, TRUE) == OK) { if (*varname == '&') { long numval; char_u *strval; int error = FALSE; ++varname; numval = (long)tv_get_number_chk(varp, &error); strval = tv_get_string_buf_chk(varp, nbuf); if (!error && strval != NULL) set_option_value(varname, numval, strval, OPT_LOCAL); } else { winvarname = alloc(STRLEN(varname) + 3); if (winvarname != NULL) { STRCPY(winvarname, "w:"); STRCPY(winvarname + 2, varname); set_var(winvarname, varp, TRUE); vim_free(winvarname); } } } if (need_switch_win) restore_win(save_curwin, save_curtab, TRUE); } } /* * reset v:option_new, v:option_old, v:option_oldlocal, v:option_oldglobal, * v:option_type, and v:option_command. */ void reset_v_option_vars(void) { set_vim_var_string(VV_OPTION_NEW, NULL, -1); set_vim_var_string(VV_OPTION_OLD, NULL, -1); set_vim_var_string(VV_OPTION_OLDLOCAL, NULL, -1); set_vim_var_string(VV_OPTION_OLDGLOBAL, NULL, -1); set_vim_var_string(VV_OPTION_TYPE, NULL, -1); set_vim_var_string(VV_OPTION_COMMAND, NULL, -1); } /* * Add an assert error to v:errors. */ void assert_error(garray_T *gap) { struct vimvar *vp = &vimvars[VV_ERRORS]; if (vp->vv_type != VAR_LIST || vimvars[VV_ERRORS].vv_list == NULL) // Make sure v:errors is a list. set_vim_var_list(VV_ERRORS, list_alloc()); list_append_string(vimvars[VV_ERRORS].vv_list, gap->ga_data, gap->ga_len); } int var_exists(char_u *var) { char_u *name; char_u *tofree; typval_T tv; int len = 0; int n = FALSE; // get_name_len() takes care of expanding curly braces name = var; len = get_name_len(&var, &tofree, TRUE, FALSE); if (len > 0) { if (tofree != NULL) name = tofree; n = (get_var_tv(name, len, &tv, NULL, FALSE, TRUE) == OK); if (n) { // handle d.key, l[idx], f(expr) n = (handle_subscript(&var, &tv, TRUE, FALSE, name, &name) == OK); if (n) clear_tv(&tv); } } if (*var != NUL) n = FALSE; vim_free(tofree); return n; } static lval_T *redir_lval = NULL; #define EVALCMD_BUSY (redir_lval == (lval_T *)&redir_lval) static garray_T redir_ga; // only valid when redir_lval is not NULL static char_u *redir_endp = NULL; static char_u *redir_varname = NULL; /* * Start recording command output to a variable * When "append" is TRUE append to an existing variable. * Returns OK if successfully completed the setup. FAIL otherwise. */ int var_redir_start(char_u *name, int append) { int save_emsg; int err; typval_T tv; // Catch a bad name early. if (!eval_isnamec1(*name)) { emsg(_(e_invarg)); return FAIL; } // Make a copy of the name, it is used in redir_lval until redir ends. redir_varname = vim_strsave(name); if (redir_varname == NULL) return FAIL; redir_lval = ALLOC_CLEAR_ONE(lval_T); if (redir_lval == NULL) { var_redir_stop(); return FAIL; } // The output is stored in growarray "redir_ga" until redirection ends. ga_init2(&redir_ga, (int)sizeof(char), 500); // Parse the variable name (can be a dict or list entry). redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0, FNE_CHECK_START); if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL) { clear_lval(redir_lval); if (redir_endp != NULL && *redir_endp != NUL) // Trailing characters are present after the variable name emsg(_(e_trailing)); else emsg(_(e_invarg)); redir_endp = NULL; // don't store a value, only cleanup var_redir_stop(); return FAIL; } // check if we can write to the variable: set it to or append an empty // string save_emsg = did_emsg; did_emsg = FALSE; tv.v_type = VAR_STRING; tv.vval.v_string = (char_u *)""; if (append) set_var_lval(redir_lval, redir_endp, &tv, TRUE, FALSE, (char_u *)"."); else set_var_lval(redir_lval, redir_endp, &tv, TRUE, FALSE, (char_u *)"="); clear_lval(redir_lval); err = did_emsg; did_emsg |= save_emsg; if (err) { redir_endp = NULL; // don't store a value, only cleanup var_redir_stop(); return FAIL; } return OK; } /* * Append "value[value_len]" to the variable set by var_redir_start(). * The actual appending is postponed until redirection ends, because the value * appended may in fact be the string we write to, changing it may cause freed * memory to be used: * :redir => foo * :let foo * :redir END */ void var_redir_str(char_u *value, int value_len) { int len; if (redir_lval == NULL) return; if (value_len == -1) len = (int)STRLEN(value); // Append the entire string else len = value_len; // Append only "value_len" characters if (ga_grow(&redir_ga, len) == OK) { mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len); redir_ga.ga_len += len; } else var_redir_stop(); } /* * Stop redirecting command output to a variable. * Frees the allocated memory. */ void var_redir_stop(void) { typval_T tv; if (EVALCMD_BUSY) { redir_lval = NULL; return; } if (redir_lval != NULL) { // If there was no error: assign the text to the variable. if (redir_endp != NULL) { ga_append(&redir_ga, NUL); // Append the trailing NUL. tv.v_type = VAR_STRING; tv.vval.v_string = redir_ga.ga_data; // Call get_lval() again, if it's inside a Dict or List it may // have changed. redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0, FNE_CHECK_START); if (redir_endp != NULL && redir_lval->ll_name != NULL) set_var_lval(redir_lval, redir_endp, &tv, FALSE, FALSE, (char_u *)"."); clear_lval(redir_lval); } // free the collected output VIM_CLEAR(redir_ga.ga_data); VIM_CLEAR(redir_lval); } VIM_CLEAR(redir_varname); } /* * "gettabvar()" function */ void f_gettabvar(typval_T *argvars, typval_T *rettv) { win_T *oldcurwin; tabpage_T *tp, *oldtabpage; dictitem_T *v; char_u *varname; int done = FALSE; rettv->v_type = VAR_STRING; rettv->vval.v_string = NULL; varname = tv_get_string_chk(&argvars[1]); tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL)); if (tp != NULL && varname != NULL) { // Set tp to be our tabpage, temporarily. Also set the window to the // first window in the tabpage, otherwise the window is not valid. if (switch_win(&oldcurwin, &oldtabpage, tp == curtab || tp->tp_firstwin == NULL ? firstwin : tp->tp_firstwin, tp, TRUE) == OK) { // look up the variable // Let gettabvar({nr}, "") return the "t:" dictionary. v = find_var_in_ht(&tp->tp_vars->dv_hashtab, 't', varname, FALSE); if (v != NULL) { copy_tv(&v->di_tv, rettv); done = TRUE; } } // restore previous notion of curwin restore_win(oldcurwin, oldtabpage, TRUE); } if (!done && argvars[2].v_type != VAR_UNKNOWN) copy_tv(&argvars[2], rettv); } /* * "gettabwinvar()" function */ void f_gettabwinvar(typval_T *argvars, typval_T *rettv) { getwinvar(argvars, rettv, 1); } /* * "getwinvar()" function */ void f_getwinvar(typval_T *argvars, typval_T *rettv) { getwinvar(argvars, rettv, 0); } /* * "getbufvar()" function */ void f_getbufvar(typval_T *argvars, typval_T *rettv) { buf_T *buf; buf_T *save_curbuf; char_u *varname; dictitem_T *v; int done = FALSE; (void)tv_get_number(&argvars[0]); // issue errmsg if type error varname = tv_get_string_chk(&argvars[1]); ++emsg_off; buf = tv_get_buf(&argvars[0], FALSE); rettv->v_type = VAR_STRING; rettv->vval.v_string = NULL; if (buf != NULL && varname != NULL) { // set curbuf to be our buf, temporarily save_curbuf = curbuf; curbuf = buf; if (*varname == '&') { if (varname[1] == NUL) { // get all buffer-local options in a dict dict_T *opts = get_winbuf_options(TRUE); if (opts != NULL) { rettv_dict_set(rettv, opts); done = TRUE; } } else if (get_option_tv(&varname, rettv, TRUE) == OK) // buffer-local-option done = TRUE; } else { // Look up the variable. // Let getbufvar({nr}, "") return the "b:" dictionary. v = find_var_in_ht(&curbuf->b_vars->dv_hashtab, 'b', varname, FALSE); if (v != NULL) { copy_tv(&v->di_tv, rettv); done = TRUE; } } // restore previous notion of curbuf curbuf = save_curbuf; } if (!done && argvars[2].v_type != VAR_UNKNOWN) // use the default value copy_tv(&argvars[2], rettv); --emsg_off; } /* * "settabvar()" function */ void f_settabvar(typval_T *argvars, typval_T *rettv) { tabpage_T *save_curtab; tabpage_T *tp; char_u *varname, *tabvarname; typval_T *varp; rettv->vval.v_number = 0; if (check_secure()) return; tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL)); varname = tv_get_string_chk(&argvars[1]); varp = &argvars[2]; if (varname != NULL && varp != NULL && tp != NULL) { save_curtab = curtab; goto_tabpage_tp(tp, FALSE, FALSE); tabvarname = alloc(STRLEN(varname) + 3); if (tabvarname != NULL) { STRCPY(tabvarname, "t:"); STRCPY(tabvarname + 2, varname); set_var(tabvarname, varp, TRUE); vim_free(tabvarname); } // Restore current tabpage if (valid_tabpage(save_curtab)) goto_tabpage_tp(save_curtab, FALSE, FALSE); } } /* * "settabwinvar()" function */ void f_settabwinvar(typval_T *argvars, typval_T *rettv) { setwinvar(argvars, rettv, 1); } /* * "setwinvar()" function */ void f_setwinvar(typval_T *argvars, typval_T *rettv) { setwinvar(argvars, rettv, 0); } /* * "setbufvar()" function */ void f_setbufvar(typval_T *argvars, typval_T *rettv UNUSED) { buf_T *buf; char_u *varname, *bufvarname; typval_T *varp; char_u nbuf[NUMBUFLEN]; if (check_secure()) return; (void)tv_get_number(&argvars[0]); // issue errmsg if type error varname = tv_get_string_chk(&argvars[1]); buf = tv_get_buf(&argvars[0], FALSE); varp = &argvars[2]; if (buf != NULL && varname != NULL && varp != NULL) { if (*varname == '&') { long numval; char_u *strval; int error = FALSE; aco_save_T aco; // set curbuf to be our buf, temporarily aucmd_prepbuf(&aco, buf); ++varname; numval = (long)tv_get_number_chk(varp, &error); strval = tv_get_string_buf_chk(varp, nbuf); if (!error && strval != NULL) set_option_value(varname, numval, strval, OPT_LOCAL); // reset notion of buffer aucmd_restbuf(&aco); } else { buf_T *save_curbuf = curbuf; bufvarname = alloc(STRLEN(varname) + 3); if (bufvarname != NULL) { curbuf = buf; STRCPY(bufvarname, "b:"); STRCPY(bufvarname + 2, varname); set_var(bufvarname, varp, TRUE); vim_free(bufvarname); curbuf = save_curbuf; } } } } /* * Get a callback from "arg". It can be a Funcref or a function name. * When "arg" is zero return an empty string. * "cb_name" is not allocated. * "cb_name" is set to NULL for an invalid argument. */ callback_T get_callback(typval_T *arg) { callback_T res; res.cb_free_name = FALSE; if (arg->v_type == VAR_PARTIAL && arg->vval.v_partial != NULL) { res.cb_partial = arg->vval.v_partial; ++res.cb_partial->pt_refcount; res.cb_name = partial_name(res.cb_partial); } else { res.cb_partial = NULL; if (arg->v_type == VAR_FUNC || arg->v_type == VAR_STRING) { // Note that we don't make a copy of the string. res.cb_name = arg->vval.v_string; func_ref(res.cb_name); } else if (arg->v_type == VAR_NUMBER && arg->vval.v_number == 0) { res.cb_name = (char_u *)""; } else { emsg(_("E921: Invalid callback argument")); res.cb_name = NULL; } } return res; } /* * Copy a callback into a typval_T. */ void put_callback(callback_T *cb, typval_T *tv) { if (cb->cb_partial != NULL) { tv->v_type = VAR_PARTIAL; tv->vval.v_partial = cb->cb_partial; ++tv->vval.v_partial->pt_refcount; } else { tv->v_type = VAR_FUNC; tv->vval.v_string = vim_strsave(cb->cb_name); func_ref(cb->cb_name); } } /* * Make a copy of "src" into "dest", allocating the function name if needed, * without incrementing the refcount. */ void set_callback(callback_T *dest, callback_T *src) { if (src->cb_partial == NULL) { // just a function name, make a copy dest->cb_name = vim_strsave(src->cb_name); dest->cb_free_name = TRUE; } else { // cb_name is a pointer into cb_partial dest->cb_name = src->cb_name; dest->cb_free_name = FALSE; } dest->cb_partial = src->cb_partial; } /* * Unref/free "callback" returned by get_callback() or set_callback(). */ void free_callback(callback_T *callback) { if (callback->cb_partial != NULL) { partial_unref(callback->cb_partial); callback->cb_partial = NULL; } else if (callback->cb_name != NULL) func_unref(callback->cb_name); if (callback->cb_free_name) { vim_free(callback->cb_name); callback->cb_free_name = FALSE; } callback->cb_name = NULL; } #endif // FEAT_EVAL