summaryrefslogtreecommitdiffstats
path: root/src/evalvars.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:09:20 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:09:20 +0000
commit029f72b1a93430b24b88eb3a72c6114d9f149737 (patch)
tree765d5c2041967f9c6fef195fe343d9234a030e90 /src/evalvars.c
parentInitial commit. (diff)
downloadvim-029f72b1a93430b24b88eb3a72c6114d9f149737.tar.xz
vim-029f72b1a93430b24b88eb3a72c6114d9f149737.zip
Adding upstream version 2:9.1.0016.upstream/2%9.1.0016
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/evalvars.c')
-rw-r--r--src/evalvars.c5142
1 files changed, 5142 insertions, 0 deletions
diff --git a/src/evalvars.c b/src/evalvars.c
new file mode 100644
index 0000000..8e42c5a
--- /dev/null
+++ b/src/evalvars.c
@@ -0,0 +1,5142 @@
+/* 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 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}}
+
+typedef struct vimvar vimvar_T;
+
+static struct vimvar
+{
+ char *vv_name; // name of variable, without v:
+ dictitem16_T vv_di; // value and name for key (max 16 chars!)
+ type_T *vv_type; // type or NULL
+ 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), NULL, VV_COMPAT+VV_RO},
+ {VV_NAME("count1", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("prevcount", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("errmsg", VAR_STRING), NULL, VV_COMPAT},
+ {VV_NAME("warningmsg", VAR_STRING), NULL, 0},
+ {VV_NAME("statusmsg", VAR_STRING), NULL, 0},
+ {VV_NAME("shell_error", VAR_NUMBER), NULL, VV_COMPAT+VV_RO},
+ {VV_NAME("this_session", VAR_STRING), NULL, VV_COMPAT},
+ {VV_NAME("version", VAR_NUMBER), NULL, VV_COMPAT+VV_RO},
+ {VV_NAME("lnum", VAR_NUMBER), NULL, VV_RO_SBX},
+ {VV_NAME("termresponse", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fname", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("lang", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("lc_time", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("ctype", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("charconvert_from", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("charconvert_to", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fname_in", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fname_out", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fname_new", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fname_diff", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("cmdarg", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("foldstart", VAR_NUMBER), NULL, VV_RO_SBX},
+ {VV_NAME("foldend", VAR_NUMBER), NULL, VV_RO_SBX},
+ {VV_NAME("folddashes", VAR_STRING), NULL, VV_RO_SBX},
+ {VV_NAME("foldlevel", VAR_NUMBER), NULL, VV_RO_SBX},
+ {VV_NAME("progname", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("servername", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("dying", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("exception", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("throwpoint", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("register", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("cmdbang", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("insertmode", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("val", VAR_UNKNOWN), NULL, VV_RO},
+ {VV_NAME("key", VAR_UNKNOWN), NULL, VV_RO},
+ {VV_NAME("profiling", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("fcs_reason", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("fcs_choice", VAR_STRING), NULL, 0},
+ {VV_NAME("beval_bufnr", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("beval_winnr", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("beval_winid", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("beval_lnum", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("beval_col", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("beval_text", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("scrollstart", VAR_STRING), NULL, 0},
+ {VV_NAME("swapname", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("swapchoice", VAR_STRING), NULL, 0},
+ {VV_NAME("swapcommand", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("char", VAR_STRING), NULL, 0},
+ {VV_NAME("mouse_win", VAR_NUMBER), NULL, 0},
+ {VV_NAME("mouse_winid", VAR_NUMBER), NULL, 0},
+ {VV_NAME("mouse_lnum", VAR_NUMBER), NULL, 0},
+ {VV_NAME("mouse_col", VAR_NUMBER), NULL, 0},
+ {VV_NAME("operator", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("searchforward", VAR_NUMBER), NULL, 0},
+ {VV_NAME("hlsearch", VAR_NUMBER), NULL, 0},
+ {VV_NAME("oldfiles", VAR_LIST), &t_list_string, 0},
+ {VV_NAME("windowid", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("progpath", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("completed_item", VAR_DICT), &t_dict_string, 0},
+ {VV_NAME("option_new", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("option_old", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("option_oldlocal", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("option_oldglobal", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("option_command", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("option_type", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("errors", VAR_LIST), &t_list_string, 0},
+ {VV_NAME("false", VAR_BOOL), NULL, VV_RO},
+ {VV_NAME("true", VAR_BOOL), NULL, VV_RO},
+ {VV_NAME("none", VAR_SPECIAL), NULL, VV_RO},
+ {VV_NAME("null", VAR_SPECIAL), NULL, VV_RO},
+ {VV_NAME("numbermax", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("numbermin", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("numbersize", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("vim_did_enter", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("testing", VAR_NUMBER), NULL, 0},
+ {VV_NAME("t_number", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_string", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_func", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_list", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_dict", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_float", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_bool", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_none", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_job", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_channel", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_blob", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_class", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_object", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("termrfgresp", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("termrbgresp", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("termu7resp", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("termstyleresp", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("termblinkresp", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("event", VAR_DICT), NULL, VV_RO},
+ {VV_NAME("versionlong", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("echospace", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("argv", VAR_LIST), &t_list_string, VV_RO},
+ {VV_NAME("collate", VAR_STRING), NULL, VV_RO},
+ {VV_NAME("exiting", VAR_SPECIAL), NULL, VV_RO},
+ {VV_NAME("colornames", VAR_DICT), &t_dict_string, VV_RO},
+ {VV_NAME("sizeofint", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("sizeoflong", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("sizeofpointer", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("maxcol", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("python3_version", VAR_NUMBER), NULL, VV_RO},
+ {VV_NAME("t_typealias", VAR_NUMBER), NULL, VV_RO},
+};
+
+// shorthand
+#define vv_tv_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"
+
+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 flags, char_u *endchars, char_u *op, int var_idx);
+static int do_unlet_var(lval_T *lp, char_u *name_end, exarg_T *eap, int deep, void *cookie);
+static int do_lock_var(lval_T *lp, char_u *name_end, exarg_T *eap, int deep, void *cookie);
+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("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_tv_type != VAR_UNKNOWN)
+ hash_add(&vimvarht, p->vv_di.di_key, "initialization");
+ if (p->vv_flags & VV_COMPAT)
+ // add to compat scope dict
+ hash_add(&compat_hashtab, p->vv_di.di_key, "initialization");
+ }
+ set_vim_var_nr(VV_VERSION, VIM_VERSION_100);
+ set_vim_var_nr(VV_VERSIONLONG, VIM_VERSION_100 * 10000 + highest_patch());
+
+ set_vim_var_nr(VV_SEARCHFORWARD, 1L);
+ set_vim_var_nr(VV_HLSEARCH, 1L);
+ set_vim_var_nr(VV_EXITING, VVAL_NULL);
+ 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_NUMBERMAX, VARNUM_MAX);
+ set_vim_var_nr(VV_NUMBERMIN, VARNUM_MIN);
+ set_vim_var_nr(VV_NUMBERSIZE, sizeof(varnumber_T) * 8);
+ set_vim_var_nr(VV_SIZEOFINT, sizeof(int));
+ set_vim_var_nr(VV_SIZEOFLONG, sizeof(long));
+ set_vim_var_nr(VV_SIZEOFPOINTER, sizeof(char *));
+ set_vim_var_nr(VV_MAXCOL, MAXCOL);
+
+ 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_TYPE_CLASS, VAR_TYPE_CLASS);
+ set_vim_var_nr(VV_TYPE_OBJECT, VAR_TYPE_OBJECT);
+ set_vim_var_nr(VV_TYPE_TYPEALIAS, VAR_TYPE_TYPEALIAS);
+
+ set_vim_var_nr(VV_ECHOSPACE, sc_col - 1);
+
+ set_vim_var_dict(VV_COLORNAMES, dict_alloc());
+
+#ifdef FEAT_PYTHON3
+ set_vim_var_nr(VV_PYTHON3_VERSION, python3_version());
+#endif
+
+ // Default for v:register is not 0 but '"'. This is adjusted once the
+ // clipboard has been setup by calling reset_reg_var().
+ set_reg_var(0);
+}
+
+#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. Clear all the variables here.
+ // The scriptvar_T is cleared later in free_scriptnames(), because a
+ // variable in one script might hold a reference to the whole scope of
+ // another script.
+ for (i = 1; i <= script_items.ga_len; ++i)
+ vars_clear(&SCRIPT_VARS(i));
+}
+#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 idx;
+ int abort = FALSE;
+ scriptitem_T *si;
+
+ for (i = 1; i <= script_items.ga_len; ++i)
+ {
+ abort = abort || set_ref_in_ht(&SCRIPT_VARS(i), copyID, NULL);
+
+ si = SCRIPT_ITEM(i);
+ for (idx = 0; idx < si->sn_var_vals.ga_len; ++idx)
+ {
+ svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
+
+ if (sv->sv_name != NULL)
+ abort = abort || set_ref_in_item(sv->sv_tv, copyID, NULL, 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)
+ return;
+
+ tvp = alloc_string_tv(val);
+ if (tvp == NULL)
+ return;
+
+ 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;
+ sctx_T saved_sctx = current_sctx;
+ sctx_T *ctx;
+
+ 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);
+ ctx = get_option_sctx("charconvert");
+ if (ctx != NULL)
+ current_sctx = *ctx;
+
+ if (eval_to_bool(p_ccv, &err, NULL, FALSE, TRUE))
+ 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);
+ current_sctx = saved_sctx;
+
+ if (err)
+ return FAIL;
+ return OK;
+}
+
+# if defined(FEAT_POSTSCRIPT) || defined(PROTO)
+ int
+eval_printexpr(char_u *fname, char_u *args)
+{
+ int err = FALSE;
+ sctx_T saved_sctx = current_sctx;
+ sctx_T *ctx;
+
+ set_vim_var_string(VV_FNAME_IN, fname, -1);
+ set_vim_var_string(VV_CMDARG, args, -1);
+ ctx = get_option_sctx("printexpr");
+ if (ctx != NULL)
+ current_sctx = *ctx;
+
+ if (eval_to_bool(p_pexpr, &err, NULL, FALSE, TRUE))
+ err = TRUE;
+
+ set_vim_var_string(VV_FNAME_IN, NULL, -1);
+ set_vim_var_string(VV_CMDARG, NULL, -1);
+ current_sctx = saved_sctx;
+
+ 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)
+{
+ sctx_T saved_sctx = current_sctx;
+ sctx_T *ctx;
+ typval_T *tv;
+
+ 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);
+
+ ctx = get_option_sctx("diffexpr");
+ if (ctx != NULL)
+ current_sctx = *ctx;
+
+ // errors are ignored
+ tv = eval_expr_ext(p_dex, NULL, TRUE);
+ free_tv(tv);
+
+ 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);
+ current_sctx = saved_sctx;
+}
+
+ void
+eval_patch(
+ char_u *origfile,
+ char_u *difffile,
+ char_u *outfile)
+{
+ sctx_T saved_sctx = current_sctx;
+ sctx_T *ctx;
+ typval_T *tv;
+
+ 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);
+
+ ctx = get_option_sctx("patchexpr");
+ if (ctx != NULL)
+ current_sctx = *ctx;
+
+ // errors are ignored
+ tv = eval_expr_ext(p_pex, NULL, TRUE);
+ free_tv(tv);
+
+ 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);
+ current_sctx = saved_sctx;
+}
+# 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);
+ sctx_T saved_sctx = current_sctx;
+ sctx_T *ctx;
+ int r;
+
+ // 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;
+ ctx = get_option_sctx("spellsuggest");
+ if (ctx != NULL)
+ current_sctx = *ctx;
+
+ r = may_call_simple_func(p, &rettv);
+ if (r == NOTDONE)
+ r = eval1(&p, &rettv, &EVALARG_EVALUATE);
+ if (r == 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);
+ current_sctx = saved_sctx;
+
+ 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_tv_type == VAR_UNKNOWN)
+ hash_add(&vimvarht, vimvars[idx].vv_di.di_key, "prepare vimvar");
+}
+
+/*
+ * 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_tv_type != VAR_UNKNOWN)
+ return;
+
+ hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
+ if (HASHITEM_EMPTY(hi))
+ internal_error("restore_vimvar()");
+ else
+ hash_remove(&vimvarht, hi, "restore vimvar");
+}
+
+/*
+ * 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 (SCRIPT_ID_VALID(current_sctx.sc_sid))
+ list_hashtable_vars(&SCRIPT_VARS(current_sctx.sc_sid),
+ "s:", FALSE, first);
+}
+
+/*
+ * Return TRUE if "name" starts with "g:", "w:", "t:" or "b:".
+ * But only when an identifier character follows.
+ */
+ int
+is_scoped_variable(char_u *name)
+{
+ return vim_strchr((char_u *)"gwbt", name[0]) != NULL
+ && name[1] == ':'
+ && eval_isnamec(name[2]);
+}
+
+/*
+ * Evaluate one Vim expression {expr} in string "p" and append the
+ * resulting string to "gap". "p" points to the opening "{".
+ * When "evaluate" is FALSE only skip over the expression.
+ * Return a pointer to the character after "}", NULL for an error.
+ */
+ char_u *
+eval_one_expr_in_str(char_u *p, garray_T *gap, int evaluate)
+{
+ char_u *block_start = skipwhite(p + 1); // skip the opening {
+ char_u *block_end = block_start;
+ char_u *expr_val;
+
+ if (*block_start == NUL)
+ {
+ semsg(_(e_missing_close_curly_str), p);
+ return NULL;
+ }
+ if (skip_expr(&block_end, NULL) == FAIL)
+ return NULL;
+ block_end = skipwhite(block_end);
+ if (*block_end != '}')
+ {
+ semsg(_(e_missing_close_curly_str), p);
+ return NULL;
+ }
+ if (evaluate)
+ {
+ *block_end = NUL;
+ expr_val = eval_to_string(block_start, TRUE, FALSE);
+ *block_end = '}';
+ if (expr_val == NULL)
+ return NULL;
+ ga_concat(gap, expr_val);
+ vim_free(expr_val);
+ }
+
+ return block_end + 1;
+}
+
+/*
+ * Evaluate all the Vim expressions {expr} in "str" and return the resulting
+ * string in allocated memory. "{{" is reduced to "{" and "}}" to "}".
+ * Used for a heredoc assignment.
+ * Returns NULL for an error.
+ */
+ static char_u *
+eval_all_expr_in_str(char_u *str)
+{
+ garray_T ga;
+ char_u *p;
+
+ ga_init2(&ga, 1, 80);
+ p = str;
+
+ while (*p != NUL)
+ {
+ char_u *lit_start;
+ int escaped_brace = FALSE;
+
+ // Look for a block start.
+ lit_start = p;
+ while (*p != '{' && *p != '}' && *p != NUL)
+ ++p;
+
+ if (*p != NUL && *p == p[1])
+ {
+ // Escaped brace, unescape and continue.
+ // Include the brace in the literal string.
+ ++p;
+ escaped_brace = TRUE;
+ }
+ else if (*p == '}')
+ {
+ semsg(_(e_stray_closing_curly_str), str);
+ ga_clear(&ga);
+ return NULL;
+ }
+
+ // Append the literal part.
+ ga_concat_len(&ga, lit_start, (size_t)(p - lit_start));
+
+ if (*p == NUL)
+ break;
+
+ if (escaped_brace)
+ {
+ // Skip the second brace.
+ ++p;
+ continue;
+ }
+
+ // Evaluate the expression and append the result.
+ p = eval_one_expr_in_str(p, &ga, TRUE);
+ if (p == NULL)
+ {
+ ga_clear(&ga);
+ return NULL;
+ }
+ }
+ ga_append(&ga, NUL);
+
+ return ga.ga_data;
+}
+
+/*
+ * 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.
+ *
+ * When getting lines for an embedded script (e.g. python, lua, perl, ruby,
+ * tcl, mzscheme), "script_get" is set to TRUE. In this case, if the marker is
+ * missing, then '.' is accepted as a marker.
+ *
+ * When compiling a heredoc assignment to a variable in a Vim9 def function,
+ * "vim9compile" is set to TRUE. In this case, instead of generating a list of
+ * string values from the heredoc, vim9 instructions are generated. On success
+ * the returned list will be empty.
+ *
+ * Returns a List with {lines} or NULL on failure.
+ */
+ list_T *
+heredoc_get(exarg_T *eap, char_u *cmd, int script_get, int vim9compile)
+{
+ char_u *theline = NULL;
+ char_u *marker;
+ list_T *l;
+ char_u *p;
+ char_u *str;
+ int marker_indent_len = 0;
+ int text_indent_len = 0;
+ char_u *text_indent = NULL;
+ char_u dot[] = ".";
+ int comment_char = in_vim9script() ? '#' : '"';
+ int evalstr = FALSE;
+ int eval_failed = FALSE;
+ cctx_T *cctx = vim9compile ? eap->cookie : NULL;
+ int count = 0;
+
+ if (eap->ea_getline == NULL)
+ {
+ emsg(_(e_cannot_use_heredoc_here));
+ return NULL;
+ }
+
+ // Check for the optional 'trim' word before the marker
+ cmd = skipwhite(cmd);
+
+ while (TRUE)
+ {
+ 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;
+
+ continue;
+ }
+ if (STRNCMP(cmd, "eval", 4) == 0
+ && (cmd[4] == NUL || VIM_ISWHITE(cmd[4])))
+ {
+ cmd = skipwhite(cmd + 4);
+ evalstr = TRUE;
+ continue;
+ }
+ break;
+ }
+
+ // The marker is the next word.
+ if (*cmd != NUL && *cmd != comment_char)
+ {
+ marker = skipwhite(cmd);
+ p = skiptowhite(marker);
+ if (*skipwhite(p) != NUL && *skipwhite(p) != comment_char)
+ {
+ semsg(_(e_trailing_characters_str), p);
+ return NULL;
+ }
+ *p = NUL;
+ if (!script_get && vim_islower(*marker))
+ {
+ emsg(_(e_marker_cannot_start_with_lower_case_letter));
+ return NULL;
+ }
+ }
+ else
+ {
+ // When getting lines for an embedded script, if the marker is missing,
+ // accept '.' as the marker.
+ if (script_get)
+ marker = dot;
+ else
+ {
+ emsg(_(e_missing_marker));
+ return NULL;
+ }
+ }
+
+ l = list_alloc();
+ if (l == NULL)
+ return NULL;
+
+ for (;;)
+ {
+ int mi = 0;
+ int ti = 0;
+
+ vim_free(theline);
+ theline = eap->ea_getline(NUL, eap->cookie, 0, FALSE);
+ if (theline == NULL)
+ {
+ semsg(_(e_missing_end_marker_str), 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)
+ break;
+
+ // If expression evaluation failed in the heredoc, then skip till the
+ // end marker.
+ if (eval_failed)
+ continue;
+
+ 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;
+
+ str = theline + ti;
+ if (vim9compile)
+ {
+ if (compile_all_expr_in_str(str, evalstr, cctx) == FAIL)
+ {
+ vim_free(theline);
+ vim_free(text_indent);
+ return FAIL;
+ }
+ count++;
+ }
+ else
+ {
+ if (evalstr && !eap->skip)
+ {
+ str = eval_all_expr_in_str(str);
+ if (str == NULL)
+ {
+ // expression evaluation failed
+ eval_failed = TRUE;
+ continue;
+ }
+ vim_free(theline);
+ theline = str;
+ }
+
+ if (list_append_string(l, str, -1) == FAIL)
+ break;
+ }
+ }
+ vim_free(theline);
+ vim_free(text_indent);
+
+ if (vim9compile && cctx->ctx_skip != SKIP_YES && !eval_failed)
+ generate_NEWLIST(cctx, count, FALSE);
+
+ if (eval_failed)
+ {
+ // expression evaluation in the heredoc failed
+ list_free(l);
+ return NULL;
+ }
+ return l;
+}
+
+/*
+ * Vim9 variable declaration:
+ * ":var name"
+ * ":var name: type"
+ * ":var name = expr"
+ * ":var name: type = expr"
+ * etc.
+ */
+ void
+ex_var(exarg_T *eap)
+{
+ char_u *p = eap->cmd;
+ int has_var;
+
+ if (!in_vim9script())
+ {
+ semsg(_(e_str_cannot_be_used_in_legacy_vim_script), ":var");
+ return;
+ }
+ has_var = checkforcmd_noparen(&p, "var", 3);
+ if (current_sctx.sc_sid == 0 && has_var)
+ {
+ emsg(_(e_cannot_declare_variable_on_command_line));
+ return;
+ }
+ ex_let(eap);
+}
+
+/*
+ * ":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.
+ * ":let var =<< ..." heredoc
+ * ":let var: string" Vim9 declaration
+ *
+ * ":final var = expr" assignment command.
+ * ":final [var1, var2] = expr" unpack list.
+ *
+ * ":const" list all variable values
+ * ":const var1 var2" list variable values
+ * ":const var = expr" assignment command.
+ * ":const [var1, var2] = expr" unpack list.
+ */
+ void
+ex_let(exarg_T *eap)
+{
+ char_u *arg = eap->arg;
+ char_u *expr = NULL;
+ typval_T rettv;
+ int var_count = 0;
+ int semicolon = 0;
+ char_u op[4];
+ char_u *argend;
+ int first = TRUE;
+ int concat;
+ int has_assign;
+ int flags = 0;
+ int vim9script = in_vim9script();
+
+ if (eap->cmdidx == CMD_final && !vim9script)
+ {
+ // In legacy Vim script ":final" is short for ":finally".
+ ex_finally(eap);
+ return;
+ }
+ if (eap->cmdidx == CMD_let && vim9script)
+ {
+ emsg(_(e_cannot_use_let_in_vim9_script));
+ return;
+ }
+
+ if (eap->cmdidx == CMD_const)
+ flags |= ASSIGN_CONST;
+ else if (eap->cmdidx == CMD_final)
+ flags |= ASSIGN_FINAL;
+
+ // Vim9 assignment without ":let", ":const" or ":final"
+ if (eap->arg == eap->cmd)
+ flags |= ASSIGN_NO_DECL;
+
+ argend = skip_var_list(arg, TRUE, &var_count, &semicolon, FALSE);
+ if (argend == NULL)
+ return;
+ if (argend > arg && argend[-1] == '.') // for var.='str'
+ --argend;
+ expr = skipwhite(argend);
+ concat = expr[0] == '.'
+ && ((expr[1] == '=' && in_old_script(2))
+ || (expr[1] == '.' && expr[2] == '='));
+ has_assign = *expr == '=' || (vim_strchr((char_u *)"+-*/%", *expr) != NULL
+ && expr[1] == '=');
+ if (!has_assign && !concat)
+ {
+ // ":let" without "=": list variables
+ if (*arg == '[')
+ emsg(_(e_invalid_argument));
+ else if (expr[0] == '.' && expr[1] == '=')
+ emsg(_(e_dot_equal_not_supported_with_script_version_two));
+ else if (!ends_excmd2(eap->cmd, arg))
+ {
+ if (vim9script)
+ {
+ if (!ends_excmd2(eap->cmd, skipwhite(argend)))
+ semsg(_(e_trailing_characters_str), argend);
+ else
+ // Vim9 declaration ":var name: type"
+ arg = vim9_declare_scriptvar(eap, arg);
+ }
+ else
+ {
+ // ":let var1 var2" - list values
+ 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);
+ }
+ set_nextcmd(eap, arg);
+ return;
+ }
+
+ if (expr[0] == '=' && expr[1] == '<' && expr[2] == '<')
+ {
+ list_T *l = NULL;
+ long cur_lnum = SOURCING_LNUM;
+
+ // :let text =<< [trim] [eval] END
+ // :var text =<< [trim] [eval] END
+ if (vim9script && !eap->skip && (!VIM_ISWHITE(expr[-1])
+ || !IS_WHITE_OR_NUL(expr[3])))
+ semsg(_(e_white_space_required_before_and_after_str_at_str),
+ "=<<", expr);
+ else
+ l = heredoc_get(eap, expr + 3, FALSE, FALSE);
+
+ if (l != NULL)
+ {
+ rettv_list_set(&rettv, l);
+ if (!eap->skip)
+ {
+ // errors are for the assignment, not the end marker
+ SOURCING_LNUM = cur_lnum;
+ op[0] = '=';
+ op[1] = NUL;
+ (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
+ flags, op);
+ }
+ clear_tv(&rettv);
+ }
+ return;
+ }
+
+ evalarg_T evalarg;
+ int len = 1;
+
+ CLEAR_FIELD(rettv);
+
+ int cur_lnum;
+
+ op[0] = '=';
+ op[1] = NUL;
+ if (*expr != '=')
+ {
+ if (vim9script && (flags & ASSIGN_NO_DECL) == 0)
+ {
+ // +=, /=, etc. require an existing variable
+ semsg(_(e_cannot_use_operator_on_new_variable_str), eap->arg);
+ }
+ else if (vim_strchr((char_u *)"+-*/%.", *expr) != NULL)
+ {
+ op[0] = *expr; // +=, -=, *=, /=, %= or .=
+ ++len;
+ if (expr[0] == '.' && expr[1] == '.') // ..=
+ {
+ ++expr;
+ ++len;
+ }
+ }
+ expr += 2;
+ }
+ else
+ ++expr;
+
+ if (vim9script && !eap->skip && (!VIM_ISWHITE(*argend)
+ || !IS_WHITE_OR_NUL(*expr)))
+ {
+ vim_strncpy(op, expr - len, len);
+ semsg(_(e_white_space_required_before_and_after_str_at_str),
+ op, argend);
+ }
+
+ if (eap->skip)
+ ++emsg_skip;
+ fill_evalarg_from_eap(&evalarg, eap, eap->skip);
+ expr = skipwhite_and_linebreak(expr, &evalarg);
+ cur_lnum = SOURCING_LNUM;
+ int eval_res = eval0(expr, &rettv, eap, &evalarg);
+ if (eap->skip)
+ --emsg_skip;
+ clear_evalarg(&evalarg, eap);
+
+ // Restore the line number so that any type error is given for the
+ // declaration, not the expression.
+ SOURCING_LNUM = cur_lnum;
+
+ if (!eap->skip && eval_res != FAIL)
+ (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
+ flags, op);
+ if (eval_res != FAIL)
+ clear_tv(&rettv);
+}
+
+/*
+ * Assign the typeval "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 flags, // ASSIGN_FINAL, ASSIGN_CONST, etc.
+ char_u *op)
+{
+ char_u *arg = arg_start;
+ list_T *l;
+ int i;
+ int var_idx = 0;
+ listitem_T *item;
+ typval_T ltv;
+
+ if (tv->v_type == VAR_VOID)
+ {
+ emsg(_(e_cannot_use_void_value));
+ return FAIL;
+ }
+ if (*arg != '[')
+ {
+ // ":let var = expr" or ":for var in list"
+ if (ex_let_one(arg, tv, copy, flags, op, op, var_idx) == 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_list_required));
+ return FAIL;
+ }
+
+ i = list_len(l);
+ if (semicolon == 0 && var_count < i)
+ {
+ emsg(_(e_less_targets_than_list_items));
+ return FAIL;
+ }
+ if (var_count - semicolon > i)
+ {
+ emsg(_(e_more_targets_than_list_items));
+ return FAIL;
+ }
+
+ CHECK_LIST_MATERIALIZE(l);
+ item = l->lv_first;
+ while (*arg != ']')
+ {
+ arg = skipwhite(arg + 1);
+ ++var_idx;
+ arg = ex_let_one(arg, &item->li_tv, TRUE,
+ flags | ASSIGN_UNPACK, (char_u *)",;]", op, var_idx);
+ 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;
+ ++var_idx;
+
+ arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
+ flags | ASSIGN_UNPACK, (char_u *)"]", op, var_idx);
+ clear_tv(&ltv);
+ 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" to 1.
+ * If "silent" is TRUE do not give an "invalid argument" error message.
+ * Return NULL for an error.
+ */
+ char_u *
+skip_var_list(
+ char_u *arg,
+ int include_type,
+ int *var_count,
+ int *semicolon,
+ int silent)
+{
+ 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, include_type);
+ if (s == p)
+ {
+ if (!silent)
+ semsg(_(e_invalid_argument_str), p);
+ return NULL;
+ }
+ ++*var_count;
+
+ p = skipwhite(s);
+ if (*p == ']')
+ break;
+ else if (*p == ';')
+ {
+ if (*semicolon == 1)
+ {
+ if (!silent)
+ emsg(_(e_double_semicolon_in_list_of_variables));
+ return NULL;
+ }
+ *semicolon = 1;
+ }
+ else if (*p != ',')
+ {
+ if (!silent)
+ semsg(_(e_invalid_argument_str), p);
+ return NULL;
+ }
+ }
+ return p + 1;
+ }
+
+ return skip_var_one(arg, include_type);
+}
+
+/*
+ * Skip one (assignable) variable name, including @r, $VAR, &option, d.key,
+ * l[idx].
+ * In Vim9 script also skip over ": type" if "include_type" is TRUE.
+ */
+ char_u *
+skip_var_one(char_u *arg, int include_type)
+{
+ char_u *end;
+ int vim9 = in_vim9script();
+
+ if (*arg == '@' && arg[1] != NUL)
+ return arg + 2;
+
+ // termcap option name may have non-alpha characters
+ if (STRNCMP(arg, "&t_", 3) == 0 && arg[3] != NUL && arg[4] != NUL)
+ return arg + 5;
+
+ end = find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
+ NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
+
+ // "a: type" is declaring variable "a" with a type, not "a:".
+ // Same for "s: type".
+ if (vim9 && end == arg + 2 && end[-1] == ':')
+ --end;
+
+ if (include_type && vim9)
+ {
+ if (*skipwhite(end) == ':')
+ end = skip_type(skipwhite(skipwhite(end) + 1), FALSE);
+ }
+ return end;
+}
+
+/*
+ * 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];
+
+ int save_ht_flags = ht->ht_flags;
+ ht->ht_flags |= HTFLAGS_FROZEN;
+
+ 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);
+ }
+ }
+
+ ht->ht_flags = save_ht_flags;
+}
+
+/*
+ * 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_excmd2(eap->cmd, 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;
+ if (!did_emsg)
+ semsg(_(e_trailing_characters_str), arg);
+ 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_invalid_argument_str), arg);
+ break;
+ }
+ error = TRUE;
+ }
+ else
+ {
+ arg = skipwhite(arg);
+ if (tofree != NULL)
+ name = tofree;
+ if (eval_variable(name, len, 0, &tv, NULL,
+ EVAL_VAR_VERBOSE) == FAIL)
+ error = TRUE;
+ else
+ {
+ // handle d.key, l[idx], f(expr)
+ arg_subsc = arg;
+ if (handle_subscript(&arg, name_start, &tv,
+ &EVALARG_EVALUATE, TRUE) == 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(_(e_cant_list_variables_for_str), 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 an environment variable, part of ex_let_one().
+ */
+ static char_u *
+ex_let_env(
+ char_u *arg,
+ typval_T *tv,
+ int flags,
+ char_u *endchars,
+ char_u *op)
+{
+ char_u *arg_end = NULL;
+ char_u *name;
+ int len;
+
+ if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+ && (flags & ASSIGN_FOR_LOOP) == 0)
+ {
+ emsg(_(e_cannot_lock_environment_variable));
+ return NULL;
+ }
+
+ // Find the end of the name.
+ ++arg;
+ name = arg;
+ len = get_env_len(&arg);
+ if (len == 0)
+ semsg(_(e_invalid_argument_str), name - 1);
+ else
+ {
+ if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
+ semsg(_(e_wrong_variable_type_for_str_equal), op);
+ else if (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(arg)) == NULL)
+ emsg(_(e_unexpected_characters_in_let));
+ else if (!check_secure())
+ {
+ char_u *tofree = NULL;
+ int c1 = name[len];
+ char_u *p;
+
+ 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_ext(name, p);
+ arg_end = arg;
+ }
+ name[len] = c1;
+ vim_free(tofree);
+ }
+ }
+ return arg_end;
+}
+
+/*
+ * Set an option, part of ex_let_one().
+ */
+ static char_u *
+ex_let_option(
+ char_u *arg,
+ typval_T *tv,
+ int flags,
+ char_u *endchars,
+ char_u *op)
+{
+ char_u *p;
+ int scope;
+ char_u *arg_end = NULL;
+
+ if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+ && (flags & ASSIGN_FOR_LOOP) == 0)
+ {
+ emsg(_(e_cannot_lock_option));
+ return NULL;
+ }
+
+ // Find the end of the name.
+ p = find_option_end(&arg, &scope);
+ if (p == NULL || (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(p)) == NULL))
+ {
+ emsg(_(e_unexpected_characters_in_let));
+ return NULL;
+ }
+
+ int c1;
+ long n = 0;
+ getoption_T opt_type;
+ long numval;
+ char_u *stringval = NULL;
+ char_u *s = NULL;
+ int failed = FALSE;
+ int opt_p_flags;
+ char_u *tofree = NULL;
+ char_u numbuf[NUMBUFLEN];
+
+ c1 = *p;
+ *p = NUL;
+
+ opt_type = get_option_value(arg, &numval, &stringval, &opt_p_flags, scope);
+ if (opt_type == gov_unknown && arg[0] != 't' && arg[1] != '_')
+ {
+ semsg(_(e_unknown_option_str_2), arg);
+ goto theend;
+ }
+ if (op != NULL && *op != '='
+ && (((opt_type == gov_bool || opt_type == gov_number) && *op == '.')
+ || (opt_type == gov_string && *op != '.')))
+ {
+ semsg(_(e_wrong_variable_type_for_str_equal), op);
+ goto theend;
+ }
+
+ if ((opt_type == gov_bool
+ || opt_type == gov_number
+ || opt_type == gov_hidden_bool
+ || opt_type == gov_hidden_number)
+ && (tv->v_type != VAR_STRING || !in_vim9script()))
+ {
+ if (opt_type == gov_bool || opt_type == gov_hidden_bool)
+ // bool, possibly hidden
+ n = (long)tv_get_bool_chk(tv, &failed);
+ else
+ // number, possibly hidden
+ n = (long)tv_get_number_chk(tv, &failed);
+ if (failed)
+ goto theend;
+ }
+
+ if ((opt_p_flags & P_FUNC) && (tv->v_type == VAR_PARTIAL
+ || tv->v_type == VAR_FUNC))
+ {
+ // If the option can be set to a function reference or a lambda
+ // and the passed value is a function reference, then convert it to
+ // the name (string) of the function reference.
+ s = tv2string(tv, &tofree, numbuf, 0);
+ if (s == NULL)
+ goto theend;
+ }
+ // Avoid setting a string option to the text "v:false" or similar.
+ // In Vim9 script also don't convert a number to string.
+ else if (tv->v_type != VAR_BOOL && tv->v_type != VAR_SPECIAL
+ && (!in_vim9script() || tv->v_type != VAR_NUMBER))
+ {
+ s = tv_get_string_chk(tv);
+ if (s == NULL)
+ goto theend;
+ }
+ else if (opt_type == gov_string || opt_type == gov_hidden_string)
+ {
+ emsg(_(e_string_required));
+ goto theend;
+ }
+
+ if (op != NULL && *op != '=')
+ {
+ // number, in legacy script also bool
+ if (opt_type == gov_number
+ || (opt_type == gov_bool && !in_vim9script()))
+ {
+ switch (*op)
+ {
+ case '+': n = numval + n; break;
+ case '-': n = numval - n; break;
+ case '*': n = numval * n; break;
+ case '/': n = (long)num_divide(numval, n, &failed); break;
+ case '%': n = (long)num_modulus(numval, n, &failed); break;
+ }
+ s = NULL;
+ if (failed)
+ goto theend;
+ }
+ else if (opt_type == gov_string && stringval != NULL && s != NULL)
+ {
+ // string
+ s = concat_str(stringval, s);
+ vim_free(stringval);
+ stringval = s;
+ }
+ }
+
+ char *err = set_option_value(arg, n, s, scope);
+ arg_end = p;
+ if (err != NULL)
+ emsg(_(err));
+
+theend:
+ *p = c1;
+ vim_free(stringval);
+ vim_free(tofree);
+ return arg_end;
+}
+
+/*
+ * Set a register, part of ex_let_one().
+ */
+ static char_u *
+ex_let_register(
+ char_u *arg,
+ typval_T *tv,
+ int flags,
+ char_u *endchars,
+ char_u *op)
+{
+ char_u *arg_end = NULL;
+
+ if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+ && (flags & ASSIGN_FOR_LOOP) == 0)
+ {
+ emsg(_(e_cannot_lock_register));
+ return NULL;
+ }
+ ++arg;
+ if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
+ semsg(_(e_wrong_variable_type_for_str_equal), op);
+ else if (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
+ emsg(_(e_unexpected_characters_in_let));
+ else
+ {
+ char_u *ptofree = NULL;
+ char_u *p;
+
+ p = tv_get_string_chk(tv);
+ if (p != NULL && op != NULL && *op == '.')
+ {
+ char_u *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);
+ }
+ return arg_end;
+}
+
+/*
+ * 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 flags, // ASSIGN_CONST, ASSIGN_FINAL, etc.
+ char_u *endchars, // valid chars after variable name or NULL
+ char_u *op, // "+", "-", "." or NULL
+ int var_idx) // variable index for "let [a, b] = list"
+{
+ char_u *arg_end = NULL;
+
+ if (in_vim9script() && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0
+ && (flags & (ASSIGN_CONST | ASSIGN_FINAL)) == 0
+ && vim_strchr((char_u *)"$@&", *arg) != NULL)
+ {
+ vim9_declare_error(arg);
+ return NULL;
+ }
+
+ if (check_typval_is_value(tv) == FAIL)
+ return NULL;
+
+ if (*arg == '$')
+ {
+ // ":let $VAR = expr": Set environment variable.
+ return ex_let_env(arg, tv, flags, endchars, op);
+ }
+ else if (*arg == '&')
+ {
+ // ":let &option = expr": Set option value.
+ // ":let &l:option = expr": Set local option value.
+ // ":let &g:option = expr": Set global option value.
+ // ":for &ts in range(8)": Set option value for for loop
+ return ex_let_option(arg, tv, flags, endchars, op);
+ }
+ else if (*arg == '@')
+ {
+ // ":let @r = expr": Set register contents.
+ return ex_let_register(arg, tv, flags, endchars, op);
+ }
+ else if (eval_isnamec1(*arg) || *arg == '{')
+ {
+ lval_T lv;
+ char_u *p;
+ int lval_flags = (flags & (ASSIGN_NO_DECL | ASSIGN_DECL))
+ ? GLV_NO_DECL : 0;
+ lval_flags |= (flags & ASSIGN_FOR_LOOP) ? GLV_FOR_LOOP : 0;
+ if (op != NULL && *op != '=')
+ lval_flags |= GLV_ASSIGN_WITH_OP;
+
+ // ":let var = expr": Set internal variable.
+ // ":let var: type = expr": Set internal variable with type.
+ // ":let {expr} = expr": Idem, name made with curly braces
+ p = get_lval(arg, tv, &lv, FALSE, FALSE, lval_flags, FNE_CHECK_START);
+ if (p != NULL && lv.ll_name != NULL)
+ {
+ if (endchars != NULL && vim_strchr(endchars,
+ *skipwhite(lv.ll_name_end)) == NULL)
+ {
+ emsg(_(e_unexpected_characters_in_let));
+ }
+ else
+ {
+ set_var_lval(&lv, p, tv, copy, flags, op, var_idx);
+ arg_end = lv.ll_name_end;
+ }
+ }
+ clear_lval(&lv);
+ }
+ else
+ semsg(_(e_invalid_argument_str), arg);
+
+ return arg_end;
+}
+
+/*
+ * ":unlet[!] var1 ... " command.
+ */
+ void
+ex_unlet(exarg_T *eap)
+{
+ ex_unletlock(eap, eap->arg, 0, 0, do_unlet_var, NULL);
+}
+
+/*
+ * ":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, 0, do_lock_var, NULL);
+}
+
+/*
+ * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
+ * Also used for Vim9 script. "callback" is invoked as:
+ * callback(&lv, name_end, eap, deep, cookie)
+ */
+ void
+ex_unletlock(
+ exarg_T *eap,
+ char_u *argstart,
+ int deep,
+ int glv_flags,
+ int (*callback)(lval_T *, char_u *, exarg_T *, int, void *),
+ void *cookie)
+{
+ char_u *arg = argstart;
+ char_u *name_end;
+ int error = FALSE;
+ lval_T lv;
+
+ do
+ {
+ if (*arg == '$')
+ {
+ lv.ll_name = arg;
+ lv.ll_tv = NULL;
+ ++arg;
+ if (get_env_len(&arg) == 0)
+ {
+ semsg(_(e_invalid_argument_str), arg - 1);
+ return;
+ }
+ if (!error && !eap->skip
+ && callback(&lv, arg, eap, deep, cookie) == FAIL)
+ error = TRUE;
+ name_end = arg;
+ }
+ else
+ {
+ // Parse the name and find the end.
+ name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error,
+ glv_flags | GLV_NO_DECL, 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;
+ semsg(_(e_trailing_characters_str), name_end);
+ }
+ if (!(eap->skip || error))
+ clear_lval(&lv);
+ break;
+ }
+
+ if (!error && !eap->skip
+ && callback(&lv, name_end, eap, deep, cookie) == FAIL)
+ error = TRUE;
+
+ if (!eap->skip)
+ clear_lval(&lv);
+ }
+
+ arg = skipwhite(name_end);
+ } while (!ends_excmd2(name_end, arg));
+
+ set_nextcmd(eap, arg);
+}
+
+ static int
+do_unlet_var(
+ lval_T *lp,
+ char_u *name_end,
+ exarg_T *eap,
+ int deep UNUSED,
+ void *cookie UNUSED)
+{
+ int forceit = eap->forceit;
+ int ret = OK;
+ int cc;
+
+ if (lp->ll_tv == NULL)
+ {
+ cc = *name_end;
+ *name_end = NUL;
+
+ // Environment variable, normal name or expanded name.
+ if (*lp->ll_name == '$')
+ vim_unsetenv_ext(lp->ll_name + 1);
+ else if (do_unlet(lp->ll_name, forceit) == FAIL)
+ ret = FAIL;
+ *name_end = cc;
+ }
+ else if ((lp->ll_list != NULL
+ && value_check_lock(lp->ll_list->lv_lock, lp->ll_name, FALSE))
+ || (lp->ll_dict != NULL
+ && value_check_lock(lp->ll_dict->dv_lock, lp->ll_name, FALSE)))
+ return FAIL;
+ else if (lp->ll_range)
+ list_unlet_range(lp->ll_list, lp->ll_li, lp->ll_n1,
+ !lp->ll_empty2, lp->ll_n2);
+ 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, "unlet");
+
+ return ret;
+}
+
+/*
+ * Unlet one item or a range of items from a list.
+ * Return OK or FAIL.
+ */
+ void
+list_unlet_range(
+ list_T *l,
+ listitem_T *li_first,
+ long n1_arg,
+ int has_n2,
+ long n2)
+{
+ listitem_T *li = li_first;
+ int n1 = n1_arg;
+
+ // Delete a range of List items.
+ li = li_first;
+ n1 = n1_arg;
+ while (li != NULL && (!has_n2 || n2 >= n1))
+ {
+ listitem_T *next = li->li_next;
+
+ listitem_remove(l, li);
+ li = next;
+ ++n1;
+ }
+}
+/*
+ * "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 = NULL; // init to shut up gcc
+ dict_T *d;
+ dictitem_T *di;
+
+ // can't :unlet a script variable in Vim9 script
+ if (in_vim9script() && check_vim9_unlet(name) == FAIL)
+ return FAIL;
+
+ ht = find_var_ht(name, &varname);
+
+ // can't :unlet a script variable in Vim9 script from a function
+ if (ht == get_script_local_ht()
+ && SCRIPT_ID_VALID(current_sctx.sc_sid)
+ && SCRIPT_ITEM(current_sctx.sc_sid)->sn_version
+ == SCRIPT_VERSION_VIM9
+ && check_vim9_unlet(name) == FAIL)
+ return FAIL;
+
+ 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)
+ || value_check_lock(d->dv_lock, name, FALSE)
+ || check_hashtab_frozen(ht, "unlet"))
+ return FAIL;
+
+ delete_var(ht, hi);
+ return OK;
+ }
+ }
+ if (forceit)
+ return OK;
+ semsg(_(e_no_such_variable_str), name);
+ return FAIL;
+}
+
+ static void
+report_lockvar_member(char *msg, lval_T *lp)
+{
+ int did_alloc = FALSE;
+ char_u *vname = (char_u *)"";
+ char_u *class_name = lp->ll_class != NULL
+ ? lp->ll_class->class_name : (char_u *)"";
+ if (lp->ll_name != NULL)
+ {
+ if (lp->ll_name_end == NULL)
+ vname = lp->ll_name;
+ else
+ {
+ vname = vim_strnsave(lp->ll_name, lp->ll_name_end - lp->ll_name);
+ if (vname == NULL)
+ return;
+ did_alloc = TRUE;
+ }
+ }
+ semsg(_(msg), vname, class_name);
+ if (did_alloc)
+ vim_free(vname);
+}
+
+/*
+ * 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,
+ exarg_T *eap,
+ int deep,
+ void *cookie UNUSED)
+{
+ int lock = eap->cmdidx == CMD_lockvar;
+ int ret = OK;
+ int cc;
+ dictitem_T *di;
+
+#ifdef LOG_LOCKVAR
+ ch_log(NULL, "LKVAR: do_lock_var(): name %s, is_root %d", lp->ll_name, lp->ll_is_root);
+#endif
+
+ if (lp->ll_tv == NULL)
+ {
+ cc = *name_end;
+ *name_end = NUL;
+ if (*lp->ll_name == '$')
+ {
+ semsg(_(e_cannot_lock_or_unlock_variable_str), lp->ll_name);
+ ret = FAIL;
+ }
+ else
+ {
+ // Normal name or expanded name.
+ di = find_var(lp->ll_name, NULL, TRUE);
+ if (di == NULL)
+ {
+ if (in_vim9script())
+ semsg(_(e_cannot_find_variable_to_unlock_str),
+ lp->ll_name);
+ 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(_(e_cannot_lock_or_unlock_variable_str), lp->ll_name);
+ ret = FAIL;
+ }
+ else
+ {
+ if (in_vim9script())
+ {
+ svar_T *sv = find_typval_in_script(&di->di_tv,
+ 0, FALSE);
+
+ if (sv != NULL && sv->sv_const != 0)
+ {
+ semsg(_(e_cannot_change_readonly_variable_str),
+ lp->ll_name);
+ ret = FAIL;
+ }
+ }
+
+ if (ret == OK)
+ {
+ if (lock)
+ di->di_flags |= DI_FLAGS_LOCK;
+ else
+ di->di_flags &= ~DI_FLAGS_LOCK;
+ if (deep != 0)
+ item_lock(&di->di_tv, deep, lock, FALSE);
+ }
+ }
+ }
+ }
+ *name_end = cc;
+ }
+ else if (deep == 0 && lp->ll_object == NULL && lp->ll_class == NULL)
+ {
+ // nothing to do
+ }
+ else if (lp->ll_is_root)
+ // (un)lock the item.
+ item_lock(lp->ll_tv, deep, lock, FALSE);
+ 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, FALSE);
+ 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, FALSE);
+ else if (lp->ll_object != NULL) // This check must be before ll_class.
+ {
+ // (un)lock an object variable.
+ report_lockvar_member(e_cannot_lock_object_variable_str, lp);
+ ret = FAIL;
+ }
+ else if (lp->ll_class != NULL)
+ {
+ // (un)lock a class variable.
+ report_lockvar_member(e_cannot_lock_class_variable_str, lp);
+ ret = FAIL;
+ }
+ else
+ {
+ // (un)lock a Dictionary item.
+ if (lp->ll_di == NULL)
+ {
+ emsg(_(e_dictionary_required));
+ ret = FAIL;
+ }
+ else
+ item_lock(&lp->ll_di->di_tv, deep, lock, FALSE);
+ }
+
+ return ret;
+}
+
+/*
+ * Lock or unlock an item. "deep" is nr of levels to go.
+ * When "check_refcount" is TRUE do not lock a list or dict with a reference
+ * count larger than 1.
+ */
+ void
+item_lock(typval_T *tv, int deep, int lock, int check_refcount)
+{
+ static int recurse = 0;
+ list_T *l;
+ listitem_T *li;
+ dict_T *d;
+ blob_T *b;
+ hashitem_T *hi;
+ int todo;
+
+#ifdef LOG_LOCKVAR
+ ch_log(NULL, "LKVAR: item_lock(): type %s", vartype_name(tv->v_type));
+#endif
+
+ if (recurse >= DICT_MAXNEST)
+ {
+ emsg(_(e_variable_nested_too_deep_for_unlock));
+ 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_ANY:
+ case VAR_VOID:
+ case VAR_NUMBER:
+ case VAR_BOOL:
+ case VAR_STRING:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_FLOAT:
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ case VAR_INSTR:
+ case VAR_CLASS:
+ case VAR_OBJECT:
+ case VAR_TYPEALIAS:
+ break;
+
+ case VAR_BLOB:
+ if ((b = tv->vval.v_blob) != NULL
+ && !(check_refcount && b->bv_refcount > 1))
+ {
+ if (lock)
+ b->bv_lock |= VAR_LOCKED;
+ else
+ b->bv_lock &= ~VAR_LOCKED;
+ }
+ break;
+ case VAR_LIST:
+ if ((l = tv->vval.v_list) != NULL
+ && !(check_refcount && l->lv_refcount > 1))
+ {
+ if (lock)
+ l->lv_lock |= VAR_LOCKED;
+ else
+ l->lv_lock &= ~VAR_LOCKED;
+ if (deep < 0 || deep > 1)
+ {
+ if (l->lv_first == &range_list_item)
+ l->lv_lock |= VAR_ITEMS_LOCKED;
+ else
+ {
+ // recursive: lock/unlock the items the List contains
+ CHECK_LIST_MATERIALIZE(l);
+ FOR_ALL_LIST_ITEMS(l, li) item_lock(&li->li_tv,
+ deep - 1, lock, check_refcount);
+ }
+ }
+ }
+ break;
+ case VAR_DICT:
+ if ((d = tv->vval.v_dict) != NULL
+ && !(check_refcount && d->dv_refcount > 1))
+ {
+ 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_ALL_HASHTAB_ITEMS(&d->dv_hashtab, hi, todo)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ item_lock(&HI2DI(hi)->di_tv, deep - 1, lock,
+ check_refcount);
+ }
+ }
+ }
+ }
+ }
+ --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.
+ */
+ 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 = &prevwin_curwin()->w_buffer->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 = &prevwin_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 in_vim9script() ? "false" : "v:false";
+ case VVAL_TRUE: return in_vim9script() ? "true" : "v:true";
+ case VVAL_NULL: return in_vim9script() ? "null" : "v:null";
+ case VVAL_NONE: return "v:none";
+ }
+ 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;
+}
+
+/*
+ * Returns the index of a v:variable. Negative if not found.
+ * Returns DI_ flags in "di_flags".
+ */
+ int
+find_vim_var(char_u *name, int *di_flags)
+{
+ dictitem_T *di = find_var_in_ht(&vimvarht, 0, name, TRUE);
+ struct vimvar *vv;
+
+ if (di == NULL)
+ return -1;
+ *di_flags = di->di_flags;
+ vv = (struct vimvar *)((char *)di - offsetof(vimvar_T, vv_di));
+ return (int)(vv - vimvars);
+}
+
+
+/*
+ * Set type of v: variable to "type".
+ */
+ void
+set_vim_var_type(int idx, vartype_T type)
+{
+ vimvars[idx].vv_tv_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;
+}
+
+ char *
+get_vim_var_name(int idx)
+{
+ return vimvars[idx].vv_name;
+}
+
+/*
+ * Get typval_T v: variable value.
+ */
+ typval_T *
+get_vim_var_tv(int idx)
+{
+ return &vimvars[idx].vv_tv;
+}
+
+ type_T *
+get_vim_var_type(int idx, garray_T *type_list)
+{
+ if (vimvars[idx].vv_type != NULL)
+ return vimvars[idx].vv_type;
+ return typval2type_vimvar(&vimvars[idx].vv_tv, type_list);
+}
+
+/*
+ * Set v: variable to "tv". Only accepts the same type.
+ * Takes over the value of "tv".
+ */
+ int
+set_vim_var_tv(int idx, typval_T *tv)
+{
+ if (vimvars[idx].vv_tv_type != tv->v_type)
+ {
+ emsg(_(e_type_mismatch_for_v_variable));
+ clear_tv(tv);
+ return FAIL;
+ }
+ // VV_RO is also checked when compiling, but let's check here as well.
+ if (vimvars[idx].vv_flags & VV_RO)
+ {
+ semsg(_(e_cannot_change_readonly_variable_str), vimvars[idx].vv_name);
+ return FAIL;
+ }
+ if (sandbox && (vimvars[idx].vv_flags & VV_RO_SBX))
+ {
+ semsg(_(e_cannot_set_variable_in_sandbox_str), vimvars[idx].vv_name);
+ return FAIL;
+ }
+ clear_tv(&vimvars[idx].vv_di.di_tv);
+ vimvars[idx].vv_di.di_tv = *tv;
+ return OK;
+}
+
+/*
+ * 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_tv_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_tv_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_tv_type = VAR_DICT;
+ vimvars[idx].vv_dict = val;
+ if (val == NULL)
+ return;
+
+ ++val->dv_refcount;
+ dict_set_items_ro(val);
+}
+
+/*
+ * Set the v:argv list.
+ */
+ void
+set_argv_var(char **argv, int argc)
+{
+ list_T *l = list_alloc();
+ int i;
+
+ if (l == NULL)
+ getout(1);
+ l->lv_lock = VAR_FIXED;
+ for (i = 0; i < argc; ++i)
+ {
+ if (list_append_string(l, (char_u *)argv[i], -1) == FAIL)
+ getout(1);
+ l->lv_u.mat.lv_last->li_tv.v_lock = VAR_FIXED;
+ }
+ set_vim_var_list(VV_ARGV, l);
+}
+
+/*
+ * Reset v:register, taking the 'clipboard' setting into account.
+ */
+ void
+reset_reg_var(void)
+{
+ int regname = 0;
+
+ // Adjust the register according to 'clipboard', so that when
+ // "unnamed" is present it becomes '*' or '+' instead of '"'.
+#ifdef FEAT_CLIPBOARD
+ adjust_clip_reg(&regname);
+#endif
+ set_reg_var(regname);
+}
+
+/*
+ * 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, &regname, 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".
+ * If "flags" has EVAL_VAR_IMPORT may return a VAR_ANY with v_number set to the
+ * imported script ID.
+ * Return OK or FAIL. If OK is returned "rettv" must be cleared.
+ */
+ int
+eval_variable(
+ char_u *name,
+ int len, // length of "name" or zero
+ scid_T sid, // script ID for imported item or zero
+ typval_T *rettv, // NULL when only checking existence
+ dictitem_T **dip, // non-NULL when typval's dict item is needed
+ int flags) // EVAL_VAR_ flags
+{
+ int ret = OK;
+ typval_T *tv = NULL;
+ int found = FALSE;
+ hashtab_T *ht = NULL;
+ int cc = 0;
+ type_T *type = NULL;
+
+ if (len > 0)
+ {
+ // truncate the name, so that we can use strcmp()
+ cc = name[len];
+ name[len] = NUL;
+ }
+
+ // Check for local variable when debugging.
+ if ((sid == 0) && (tv = lookup_debug_var(name)) == NULL)
+ {
+ // Check for user-defined variables.
+ dictitem_T *v = find_var(name, &ht, flags & EVAL_VAR_NOAUTOLOAD);
+
+ if (v != NULL)
+ {
+ tv = &v->di_tv;
+ if (dip != NULL)
+ *dip = v;
+ }
+ else
+ ht = NULL;
+ }
+
+ if (tv == NULL && (in_vim9script() || STRNCMP(name, "s:", 2) == 0))
+ {
+ imported_T *import = NULL;
+ char_u *p = STRNCMP(name, "s:", 2) == 0 ? name + 2 : name;
+
+ if (sid == 0)
+ import = find_imported(p, 0, TRUE);
+
+ // imported variable from another script
+ if (import != NULL || sid != 0)
+ {
+ if ((flags & EVAL_VAR_IMPORT) == 0)
+ {
+ if (SCRIPT_ID_VALID(sid))
+ {
+ ht = &SCRIPT_VARS(sid);
+ if (ht != NULL)
+ {
+ dictitem_T *v = find_var_in_ht(ht, 0, name,
+ flags & EVAL_VAR_NOAUTOLOAD);
+
+ if (v != NULL)
+ {
+ tv = &v->di_tv;
+ if (dip != NULL)
+ *dip = v;
+ }
+ else
+ ht = NULL;
+ }
+ }
+ else
+ {
+ if (flags & EVAL_VAR_VERBOSE)
+ semsg(_(e_expected_dot_after_name_str), name);
+ ret = FAIL;
+ }
+ }
+ else
+ {
+ if (rettv != NULL)
+ {
+ // special value that is used in handle_subscript()
+ rettv->v_type = VAR_ANY;
+ rettv->vval.v_number = sid != 0 ? sid : import->imp_sid;
+ }
+ found = TRUE;
+ }
+ }
+ else if (in_vim9script() && (flags & EVAL_VAR_NO_FUNC) == 0)
+ {
+ int has_g_prefix = STRNCMP(name, "g:", 2) == 0;
+ ufunc_T *ufunc = find_func(name, FALSE);
+
+ // In Vim9 script we can get a function reference by using the
+ // function name. For a global non-autoload function "g:" is
+ // required.
+ if (ufunc != NULL && (has_g_prefix
+ || !func_requires_g_prefix(ufunc)))
+ {
+ found = TRUE;
+ if (rettv != NULL)
+ {
+ rettv->v_type = VAR_FUNC;
+ if (has_g_prefix)
+ // Keep the "g:", otherwise script-local may be
+ // assumed.
+ rettv->vval.v_string = vim_strsave(name);
+ else
+ rettv->vval.v_string = vim_strsave(ufunc->uf_name);
+ if (rettv->vval.v_string != NULL)
+ func_ref(ufunc->uf_name);
+ }
+ }
+ }
+ }
+
+ if (!found)
+ {
+ if (tv == NULL)
+ {
+ if (rettv != NULL && (flags & EVAL_VAR_VERBOSE))
+ semsg(_(e_undefined_variable_str), name);
+ ret = FAIL;
+ }
+ else if (rettv != NULL)
+ {
+ svar_T *sv = NULL;
+ int was_assigned = FALSE;
+
+ if (ht != NULL && ht == get_script_local_ht()
+ && tv != &SCRIPT_SV(current_sctx.sc_sid)->sv_var.di_tv)
+ {
+ sv = find_typval_in_script(tv, 0, TRUE);
+ if (sv != NULL)
+ {
+ type = sv->sv_type;
+ was_assigned = sv->sv_flags & SVFLAG_ASSIGNED;
+ }
+ }
+
+ if ((tv->v_type == VAR_TYPEALIAS || tv->v_type == VAR_CLASS)
+ && sid != 0)
+ {
+ // type alias or class imported from another script. Check
+ // whether it is exported from the other script.
+ sv = find_typval_in_script(tv, sid, TRUE);
+ if (sv == NULL)
+ {
+ ret = FAIL;
+ goto done;
+ }
+ if ((sv->sv_flags & SVFLAG_EXPORTED) == 0)
+ {
+ semsg(_(e_item_not_exported_in_script_str), name);
+ ret = FAIL;
+ goto done;
+ }
+ }
+
+ // If a list or dict variable wasn't initialized and has meaningful
+ // type, do it now. Not for global variables, they are not
+ // declared.
+ if (ht != &globvarht)
+ {
+ if (tv->v_type == VAR_DICT && tv->vval.v_dict == NULL
+ && ((type != NULL && !was_assigned)
+ || !in_vim9script()))
+ {
+ tv->vval.v_dict = dict_alloc();
+ if (tv->vval.v_dict != NULL)
+ {
+ ++tv->vval.v_dict->dv_refcount;
+ tv->vval.v_dict->dv_type = alloc_type(type);
+ if (sv != NULL)
+ sv->sv_flags |= SVFLAG_ASSIGNED;
+ }
+ }
+ else if (tv->v_type == VAR_LIST && tv->vval.v_list == NULL
+ && ((type != NULL && !was_assigned)
+ || !in_vim9script()))
+ {
+ tv->vval.v_list = list_alloc();
+ if (tv->vval.v_list != NULL)
+ {
+ ++tv->vval.v_list->lv_refcount;
+ tv->vval.v_list->lv_type = alloc_type(type);
+ if (sv != NULL)
+ sv->sv_flags |= SVFLAG_ASSIGNED;
+ }
+ }
+ else if (tv->v_type == VAR_BLOB && tv->vval.v_blob == NULL
+ && ((type != NULL && !was_assigned)
+ || !in_vim9script()))
+ {
+ tv->vval.v_blob = blob_alloc();
+ if (tv->vval.v_blob != NULL)
+ {
+ ++tv->vval.v_blob->bv_refcount;
+ if (sv != NULL)
+ sv->sv_flags |= SVFLAG_ASSIGNED;
+ }
+ }
+ }
+ copy_tv(tv, rettv);
+ }
+ }
+
+done:
+ if (len > 0)
+ name[len] = cc;
+
+ return ret;
+}
+
+/*
+ * Get the value of internal variable "name", also handling "import.name".
+ * Return OK or FAIL. If OK is returned "rettv" must be cleared.
+ */
+ int
+eval_variable_import(
+ char_u *name,
+ typval_T *rettv)
+{
+ char_u *s = name;
+ while (ASCII_ISALNUM(*s) || *s == '_')
+ ++s;
+ int len = (int)(s - name);
+
+ if (eval_variable(name, len, 0, rettv, NULL, EVAL_VAR_IMPORT) == FAIL)
+ return FAIL;
+ if (rettv->v_type == VAR_ANY && *s == '.')
+ {
+ char_u *ns = s + 1;
+ s = ns;
+ while (ASCII_ISALNUM(*s) || *s == '_')
+ ++s;
+ int sid = rettv->vval.v_number;
+ return eval_variable(ns, (int)(s - ns), sid, rettv, NULL, 0);
+ }
+ return OK;
+}
+
+
+/*
+ * 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 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);
+ if (ret != NULL)
+ return ret;
+
+ // Search in parent scope for lambda
+ ret = find_var_in_scoped_ht(name, no_autoload);
+ if (ret != NULL)
+ return ret;
+
+ // in Vim9 script items without a scope can be script-local
+ if (in_vim9script() && name[0] != NUL && name[1] != ':')
+ {
+ ht = get_script_local_ht();
+ if (ht != NULL)
+ {
+ ret = find_var_in_ht(ht, *name, varname, no_autoload);
+ if (ret != NULL)
+ {
+ if (htp != NULL)
+ *htp = ht;
+ return ret;
+ }
+ }
+ }
+
+ // When using "vim9script autoload" script-local items are prefixed but can
+ // be used with s:name.
+ if (SCRIPT_ID_VALID(current_sctx.sc_sid)
+ && (in_vim9script() || (name[0] == 's' && name[1] == ':')))
+ {
+ scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid);
+
+ if (si->sn_autoload_prefix != NULL)
+ {
+ char_u *base_name = (name[0] == 's' && name[1] == ':')
+ ? name + 2 : name;
+ char_u *auto_name = concat_str(si->sn_autoload_prefix, base_name);
+
+ if (auto_name != NULL)
+ {
+ ht = &globvarht;
+ ret = find_var_in_ht(ht, 'g', auto_name, TRUE);
+ vim_free(auto_name);
+ if (ret != NULL)
+ {
+ if (htp != NULL)
+ *htp = ht;
+ return ret;
+ }
+ }
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ * Like find_var() but if the name starts with <SNR>99_ then look in the
+ * referenced script (used for a funcref).
+ */
+ dictitem_T *
+find_var_also_in_script(char_u *name, hashtab_T **htp, int no_autoload)
+{
+ if (STRNCMP(name, "<SNR>", 5) == 0 && SAFE_isdigit(name[5]))
+ {
+ char_u *p = name + 5;
+ int sid = getdigits(&p);
+
+ if (SCRIPT_ID_VALID(sid) && *p == '_')
+ {
+ hashtab_T *ht = &SCRIPT_VARS(sid);
+
+ if (ht != NULL)
+ {
+ dictitem_T *di = find_var_in_ht(ht, 0, p + 1, no_autoload);
+
+ if (di != NULL)
+ {
+ if (htp != NULL)
+ *htp = ht;
+ return di;
+ }
+ }
+ }
+ }
+
+ return find_var(name, htp, no_autoload);
+}
+
+/*
+ * Find variable "varname" in hashtab "ht" with name "htname".
+ * When "varname" is empty returns curwin/curtab/etc vars dictionary.
+ * 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);
+}
+
+/*
+ * Get the script-local hashtab. NULL if not in a script context.
+ */
+ hashtab_T *
+get_script_local_ht(void)
+{
+ scid_T sid = current_sctx.sc_sid;
+
+ if (SCRIPT_ID_VALID(sid))
+ return &SCRIPT_VARS(sid);
+ return NULL;
+}
+
+/*
+ * Look for "name[len]" in script-local variables and functions.
+ * When "cmd" is TRUE it must look like a command, a function must be followed
+ * by "(" or "->".
+ * Return OK when found, FAIL when not found.
+ */
+ int
+lookup_scriptitem(
+ char_u *name,
+ size_t len,
+ int cmd,
+ cctx_T *dummy UNUSED)
+{
+ hashtab_T *ht = get_script_local_ht();
+ char_u buffer[30];
+ char_u *p;
+ int res;
+ hashitem_T *hi;
+ int is_global = FALSE;
+ char_u *fname = name;
+
+ if (ht == NULL)
+ return FAIL;
+ if (len < sizeof(buffer) - 1)
+ {
+ // avoid an alloc/free for short names
+ vim_strncpy(buffer, name, len);
+ p = buffer;
+ }
+ else
+ {
+ p = vim_strnsave(name, len);
+ if (p == NULL)
+ return FAIL;
+ }
+
+ hi = hash_find(ht, p);
+ res = HASHITEM_EMPTY(hi) ? FAIL : OK;
+
+ // if not script-local, then perhaps imported
+ if (res == FAIL && find_imported(p, 0, FALSE) != NULL)
+ res = OK;
+ if (p != buffer)
+ vim_free(p);
+
+ // Find a function, so that a following "->" works.
+ // When used as a command require "(" or "->" to follow, "Cmd" is a user
+ // command while "Cmd()" is a function call.
+ if (res != OK)
+ {
+ p = skipwhite(name + len);
+
+ if (!cmd || name[len] == '(' || (p[0] == '-' && p[1] == '>'))
+ {
+ // Do not check for an internal function, since it might also be a
+ // valid command, such as ":split" versus "split()".
+ // Skip "g:" before a function name.
+ if (name[0] == 'g' && name[1] == ':')
+ {
+ is_global = TRUE;
+ fname = name + 2;
+ }
+ if (find_func(fname, is_global) != NULL)
+ res = OK;
+ }
+ }
+
+ return res;
+}
+
+/*
+ * 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 (in_old_script(3))
+ {
+ hi = hash_find(&compat_hashtab, name);
+ if (!HASHITEM_EMPTY(hi))
+ return &compat_hashtab;
+ }
+
+ ht = get_funccal_local_ht();
+ if (ht != NULL)
+ return ht; // local variable
+
+ // In Vim9 script items at the script level are script-local, except
+ // for autoload names.
+ if (in_vim9script() && vim_strchr(name, AUTOLOAD_CHAR) == NULL)
+ {
+ ht = get_script_local_ht();
+ if (ht != NULL)
+ return ht;
+ }
+
+ return &globvarht; // global 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 (get_current_funccal() != NULL
+ && get_current_funccal()->fc_func->uf_def_status
+ == UF_NOT_COMPILED)
+ {
+ // a: and l: are only used in functions defined with ":function"
+ 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
+ {
+ ht = get_script_local_ht();
+ if (ht != NULL)
+ return ht;
+ }
+ 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)
+{
+ scriptvar_T *sv;
+
+ sv = ALLOC_CLEAR_ONE(scriptvar_T);
+ if (sv == NULL)
+ return;
+ init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE);
+ SCRIPT_ITEM(id)->sn_vars = sv;
+}
+
+/*
+ * 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_ALL_HASHTAB_ITEMS(ht, hi, todo)
+ {
+ 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);
+ hash_init(ht);
+}
+
+/*
+ * Delete a variable from hashtab "ht" at item "hi".
+ * Clear the variable value and free the dictitem.
+ */
+ void
+delete_var(hashtab_T *ht, hashitem_T *hi)
+{
+ dictitem_T *di = HI2DI(hi);
+
+ if (hash_remove(ht, hi, "delete variable") != OK)
+ return;
+
+ 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;
+ }
+}
+
+/*
+ * Addition handling for setting a v: variable.
+ * Return TRUE if the variable should be set normally,
+ * FALSE if nothing else needs to be done.
+ */
+ int
+before_set_vvar(
+ char_u *varname,
+ dictitem_T *di,
+ typval_T *tv,
+ int copy,
+ int *type_error)
+{
+ if (di->di_tv.v_type == VAR_STRING)
+ {
+ VIM_CLEAR(di->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 already be set.
+ if (di->di_tv.vval.v_string == NULL)
+ di->di_tv.vval.v_string = vim_strsave(val);
+ }
+ else
+ {
+ // Take over the string to avoid an extra alloc/free.
+ di->di_tv.vval.v_string = tv->vval.v_string;
+ tv->vval.v_string = NULL;
+ }
+ return FALSE;
+ }
+ else if (di->di_tv.v_type == VAR_NUMBER)
+ {
+ di->di_tv.vval.v_number = tv_get_number(tv);
+ if (STRCMP(varname, "searchforward") == 0)
+ set_search_direction(di->di_tv.vval.v_number ? '/' : '?');
+#ifdef FEAT_SEARCH_EXTRA
+ else if (STRCMP(varname, "hlsearch") == 0)
+ {
+ no_hlsearch = !di->di_tv.vval.v_number;
+ redraw_all_later(UPD_SOME_VALID);
+ }
+#endif
+ return FALSE;
+ }
+ else if (di->di_tv.v_type != tv->v_type)
+ {
+ *type_error = TRUE;
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/*
+ * 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, 0, NULL, tv, copy, ASSIGN_DECL, 0);
+}
+
+/*
+ * Set variable "name" to value in "tv_arg".
+ * When "sid" is non-zero "name" is in the script with this ID.
+ * 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,
+ scid_T sid,
+ type_T *type_arg,
+ typval_T *tv_arg,
+ int copy, // make copy of value in "tv"
+ int flags_arg, // ASSIGN_CONST, ASSIGN_FINAL, etc.
+ int var_idx) // index for ":let [a, b] = list"
+{
+ typval_T *tv = tv_arg;
+ type_T *type = type_arg;
+ typval_T bool_tv;
+ dictitem_T *di;
+ typval_T *dest_tv;
+ char_u *varname;
+ char_u *name_tofree = NULL;
+ hashtab_T *ht = NULL;
+ int is_script_local;
+ int vim9script = in_vim9script();
+ int var_in_vim9script;
+ int var_in_autoload = FALSE;
+ int flags = flags_arg;
+ int free_tv_arg = !copy; // free tv_arg if not used
+
+ if (sid != 0)
+ {
+ if (SCRIPT_ID_VALID(sid))
+ ht = &SCRIPT_VARS(sid);
+ varname = name;
+ }
+ else
+ {
+ scriptitem_T *si;
+
+ if (in_vim9script() && is_export
+ && SCRIPT_ID_VALID(current_sctx.sc_sid)
+ && (si = SCRIPT_ITEM(current_sctx.sc_sid))
+ ->sn_autoload_prefix != NULL)
+ {
+ // In a vim9 autoload script an exported variable is put in the
+ // global namespace with the autoload prefix.
+ var_in_autoload = TRUE;
+ varname = concat_str(si->sn_autoload_prefix, name);
+ if (varname == NULL)
+ goto failed;
+ name_tofree = varname;
+ ht = &globvarht;
+ }
+ else
+ ht = find_var_ht(name, &varname);
+ }
+ if (ht == NULL || *varname == NUL)
+ {
+ semsg(_(e_illegal_variable_name_str), name);
+ goto failed;
+ }
+ is_script_local = ht == get_script_local_ht() || sid != 0
+ || var_in_autoload;
+
+ if (vim9script
+ && !is_script_local
+ && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0
+ && (flags & (ASSIGN_CONST | ASSIGN_FINAL)) == 0
+ && name[1] == ':')
+ {
+ vim9_declare_error(name);
+ goto failed;
+ }
+ if ((flags & ASSIGN_FOR_LOOP) && is_scoped_variable(name))
+ // Do not make g:var, w:var, b:var or t:var final.
+ flags &= ~ASSIGN_FINAL;
+
+ var_in_vim9script = is_script_local && current_script_is_vim9();
+ if (var_in_vim9script && name[0] == '_' && name[1] == NUL)
+ {
+ // For "[a, _] = list" the underscore is ignored.
+ if ((flags & ASSIGN_UNPACK) == 0)
+ emsg(_(e_cannot_use_underscore_here));
+ goto failed;
+ }
+
+ di = find_var_in_ht(ht, 0, varname, TRUE);
+
+ if (di == NULL && var_in_vim9script)
+ {
+ imported_T *import = find_imported(varname, 0, FALSE);
+
+ if (import != NULL)
+ {
+ // imported name space cannot be used
+ if ((flags & ASSIGN_NO_DECL) == 0)
+ {
+ semsg(_(e_redefining_imported_item_str), name);
+ goto failed;
+ }
+ semsg(_(e_cannot_use_str_itself_it_is_imported), name);
+ goto failed;
+ }
+ if (!in_vim9script())
+ {
+ semsg(_(e_cannot_create_vim9_script_variable_in_function_str),
+ name);
+ goto failed;
+ }
+ }
+
+ // Search in parent scope which is possible to reference from lambda
+ if (di == NULL)
+ di = find_var_in_scoped_ht(name, TRUE);
+
+ if ((tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL)
+ && var_wrong_func_name(name, di == NULL))
+ goto failed;
+
+ if (need_convert_to_bool(type, tv))
+ {
+ // Destination is a bool and the value is not, but it can be
+ // converted.
+ CLEAR_FIELD(bool_tv);
+ bool_tv.v_type = VAR_BOOL;
+ bool_tv.vval.v_number = tv2bool(tv) ? VVAL_TRUE : VVAL_FALSE;
+ tv = &bool_tv;
+ }
+
+ if (di != NULL)
+ {
+ // Item already exists. Allowed to replace when reloading.
+ if ((di->di_flags & DI_FLAGS_RELOAD) == 0)
+ {
+ if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+ && (flags & ASSIGN_FOR_LOOP) == 0)
+ {
+ emsg(_(e_cannot_modify_existing_variable));
+ goto failed;
+ }
+
+ if (is_script_local && vim9script
+ && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0)
+ {
+ semsg(_(e_redefining_script_item_str), name);
+ goto failed;
+ }
+
+ if (check_typval_is_value(&di->di_tv) == FAIL)
+ goto failed;
+
+ if (var_in_vim9script && (flags & ASSIGN_FOR_LOOP) == 0)
+ {
+ where_T where = WHERE_INIT;
+ svar_T *sv = find_typval_in_script(&di->di_tv, sid, TRUE);
+
+ if (sv != NULL)
+ {
+ // check the type and adjust to bool if needed
+ if (var_idx > 0)
+ {
+ where.wt_index = var_idx;
+ where.wt_kind = WT_VARIABLE;
+ }
+ if (check_script_var_type(sv, tv, name, where) == FAIL)
+ goto failed;
+ if (type == NULL)
+ type = sv->sv_type;
+ sv->sv_flags |= SVFLAG_ASSIGNED;
+ }
+ }
+
+ if ((flags & ASSIGN_FOR_LOOP) == 0
+ ? var_check_permission(di, name) == FAIL
+ : var_check_ro(di->di_flags, name, FALSE))
+ goto failed;
+ }
+ else
+ {
+ // can only redefine once
+ di->di_flags &= ~DI_FLAGS_RELOAD;
+
+ // A Vim9 script-local variable is also present in sn_all_vars
+ // and sn_var_vals. It may set "type" from "tv".
+ if (var_in_vim9script || var_in_autoload)
+ update_vim9_script_var(FALSE, di,
+ var_in_autoload ? name : di->di_key, flags,
+ tv, &type, (flags & ASSIGN_NO_MEMBER_TYPE) == 0);
+ }
+
+ // existing variable, need to clear the value
+
+ // Handle setting internal v: variables separately where needed to
+ // prevent changing the type.
+ int type_error = FALSE;
+ if (ht == &vimvarht
+ && !before_set_vvar(varname, di, tv, copy, &type_error))
+ {
+ if (type_error)
+ semsg(_(e_setting_v_str_to_value_with_wrong_type), varname);
+ goto failed;
+ }
+
+ clear_tv(&di->di_tv);
+
+ if ((flags & ASSIGN_UPDATE_BLOCK_ID)
+ && SCRIPT_ID_VALID(current_sctx.sc_sid))
+ {
+ scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid);
+
+ update_script_var_block_id(name, si->sn_current_block_id);
+ }
+ }
+ else
+ {
+ // Item not found, check if a function already exists.
+ if (is_script_local && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0
+ && lookup_scriptitem(name, STRLEN(name), FALSE, NULL) == OK)
+ {
+ semsg(_(e_redefining_script_item_str), name);
+ goto failed;
+ }
+
+ // add a new variable
+ if (var_in_vim9script && (flags & ASSIGN_NO_DECL))
+ {
+ semsg(_(e_unknown_variable_str), name);
+ goto failed;
+ }
+
+ if (check_hashtab_frozen(ht, "add variable"))
+ goto failed;
+
+ // Can't add "v:" or "a:" variable.
+ if (ht == &vimvarht || ht == get_funccal_args_ht())
+ {
+ semsg(_(e_illegal_variable_name_str), name);
+ goto failed;
+ }
+
+ // Make sure the variable name is valid. In Vim9 script an
+ // autoload variable must be prefixed with "g:" unless in an
+ // autoload script.
+ if (!valid_varname(varname, -1, !vim9script
+ || STRNCMP(name, "g:", 2) == 0 || var_in_autoload))
+ goto failed;
+
+ di = alloc(offsetof(dictitem_T, di_key) + STRLEN(varname) + 1);
+ if (di == NULL)
+ goto failed;
+ STRCPY(di->di_key, varname);
+ if (hash_add(ht, DI2HIKEY(di), "add variable") == FAIL)
+ {
+ vim_free(di);
+ goto failed;
+ }
+ di->di_flags = DI_FLAGS_ALLOC;
+ if (flags & (ASSIGN_CONST | ASSIGN_FINAL))
+ di->di_flags |= DI_FLAGS_LOCK;
+
+ // A Vim9 script-local variable is also added to sn_all_vars and
+ // sn_var_vals. It may set "type" from "tv".
+ if (var_in_vim9script || var_in_autoload)
+ update_vim9_script_var(TRUE, di,
+ var_in_autoload ? name : di->di_key, flags,
+ tv, &type, (flags & ASSIGN_NO_MEMBER_TYPE) == 0);
+ }
+
+ dest_tv = &di->di_tv;
+ if (copy || tv->v_type == VAR_NUMBER || tv->v_type == VAR_FLOAT)
+ copy_tv(tv, dest_tv);
+ else
+ {
+ *dest_tv = *tv;
+ dest_tv->v_lock = 0;
+ init_tv(tv);
+ }
+ free_tv_arg = FALSE;
+
+ if (vim9script && type != NULL)
+ set_tv_type(dest_tv, type);
+
+ // ":const var = value" locks the value
+ // ":final var = value" locks "var"
+ if (flags & ASSIGN_CONST)
+ // Like :lockvar! name: lock the value and what it contains, but only
+ // if the reference count is up to one. That locks only literal
+ // values.
+ item_lock(dest_tv, DICT_MAXNEST, TRUE, TRUE);
+
+failed:
+ vim_free(name_tofree);
+ if (free_tv_arg)
+ clear_tv(tv_arg);
+}
+
+/*
+ * Check in this order for backwards compatibility:
+ * - Whether the variable is read-only
+ * - Whether the variable value is locked
+ * - Whether the variable is locked
+ */
+ int
+var_check_permission(dictitem_T *di, char_u *name)
+{
+ if (var_check_ro(di->di_flags, name, FALSE)
+ || value_check_lock(di->di_tv.v_lock, name, FALSE)
+ || var_check_lock(di->di_flags, name, FALSE))
+ return FAIL;
+ return OK;
+}
+
+/*
+ * 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)
+ {
+ if (name == NULL)
+ emsg(_(e_cannot_change_readonly_variable));
+ else
+ semsg(_(e_cannot_change_readonly_variable_str),
+ use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ if ((flags & DI_FLAGS_RO_SBX) && sandbox)
+ {
+ if (name == NULL)
+ emsg(_(e_cannot_set_variable_in_sandbox));
+ else
+ semsg(_(e_cannot_set_variable_in_sandbox_str),
+ use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Return TRUE if di_flags "flags" indicates variable "name" is locked.
+ * Also give an error message.
+ */
+ int
+var_check_lock(int flags, char_u *name, int use_gettext)
+{
+ if (flags & DI_FLAGS_LOCK)
+ {
+ semsg(_(e_variable_is_locked_str),
+ 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)
+ {
+ if (name == NULL)
+ emsg(_(e_cannot_delete_variable));
+ else
+ semsg(_(e_cannot_delete_variable_str),
+ 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_wrong_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:. In Vim9 script s: is not allowed, because
+ // the name can be used without the s: prefix.
+ // Allow autoload variable.
+ if (!((vim_strchr((char_u *)"wbt", name[0]) != NULL
+ || (!in_vim9script() && name[0] == 's')) && name[1] == ':')
+ && !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
+ ? name[2] : name[0])
+ && vim_strchr(name, '#') == NULL)
+ {
+ semsg(_(e_funcref_variable_name_must_start_with_capital_str), 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(_(e_variable_name_conflicts_with_existing_function_str),
+ name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Return TRUE if "flags" indicates variable "name" has a locked (immutable)
+ * value. Also give an error message, using "name" or _("name") when
+ * "use_gettext" is TRUE.
+ */
+ int
+value_check_lock(int lock, char_u *name, int use_gettext)
+{
+ if (lock & VAR_LOCKED)
+ {
+ if (name == NULL)
+ emsg(_(e_value_is_locked));
+ else
+ semsg(_(e_value_is_locked_str),
+ use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ if (lock & VAR_FIXED)
+ {
+ if (name == NULL)
+ emsg(_(e_cannot_change_value));
+ else
+ semsg(_(e_cannot_change_value_of_str),
+ use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Check if a variable name is valid. When "autoload" is true "#" is allowed.
+ * If "len" is -1 use all of "varname", otherwise up to "varname[len]".
+ * Return FALSE and give an error if not.
+ */
+ int
+valid_varname(char_u *varname, int len, int autoload)
+{
+ char_u *p;
+
+ for (p = varname; len < 0 ? *p != NUL : p < varname + len; ++p)
+ if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
+ && !(autoload && *p == AUTOLOAD_CHAR))
+ {
+ semsg(_(e_illegal_variable_name_str), varname);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/*
+ * Implements the logic to retrieve local variable and option values.
+ * Used by "getwinvar()" "gettabvar()" "gettabwinvar()" "getbufvar()".
+ */
+ static void
+get_var_from(
+ char_u *varname,
+ typval_T *rettv,
+ typval_T *deftv, // Default value if not found.
+ int htname, // 't'ab, 'w'indow or 'b'uffer local.
+ tabpage_T *tp, // can be NULL
+ win_T *win,
+ buf_T *buf) // Ignored if htname is not 'b'.
+{
+ dictitem_T *v;
+ int done = FALSE;
+ switchwin_T switchwin;
+ int need_switch_win;
+ int do_change_curbuf = buf != NULL && htname == 'b';
+
+ ++emsg_off;
+
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
+
+ if (varname != NULL && tp != NULL && win != NULL
+ && (htname != 'b' || buf != 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.
+ // If we have a buffer reference avoid the switching, we're saving and
+ // restoring curbuf directly.
+ need_switch_win = !(tp == curtab && win == curwin) && !do_change_curbuf;
+ if (!need_switch_win || switch_win(&switchwin, win, tp, TRUE) == OK)
+ {
+ // Handle options. There are no tab-local options.
+ if (*varname == '&' && htname != 't')
+ {
+ buf_T *save_curbuf = curbuf;
+
+ // Change curbuf so the option is read from the correct buffer.
+ if (do_change_curbuf)
+ curbuf = buf;
+
+ if (varname[1] == NUL)
+ {
+ // get all window-local or buffer-local options in a dict
+ dict_T *opts = get_winbuf_options(htname == 'b');
+
+ if (opts != NULL)
+ {
+ rettv_dict_set(rettv, opts);
+ done = TRUE;
+ }
+ }
+ else if (eval_option(&varname, rettv, TRUE) == OK)
+ // Local option
+ done = TRUE;
+
+ curbuf = save_curbuf;
+ }
+ else if (*varname == NUL)
+ {
+ // Empty string: return a dict with all the local variables.
+ if (htname == 'b')
+ v = &buf->b_bufvar;
+ else if (htname == 'w')
+ v = &win->w_winvar;
+ else
+ v = &tp->tp_winvar;
+ copy_tv(&v->di_tv, rettv);
+ done = TRUE;
+ }
+ else
+ {
+ hashtab_T *ht;
+
+ if (htname == 'b')
+ ht = &buf->b_vars->dv_hashtab;
+ else if (htname == 'w')
+ ht = &win->w_vars->dv_hashtab;
+ else
+ ht = &tp->tp_vars->dv_hashtab;
+
+ // Look up the variable.
+ v = find_var_in_ht(ht, htname, varname, FALSE);
+ if (v != NULL)
+ {
+ copy_tv(&v->di_tv, rettv);
+ done = TRUE;
+ }
+ }
+ }
+
+ if (need_switch_win)
+ // restore previous notion of curwin
+ restore_win(&switchwin, TRUE);
+ }
+
+ if (!done && deftv->v_type != VAR_UNKNOWN)
+ // use the default value
+ copy_tv(deftv, rettv);
+
+ --emsg_off;
+}
+
+/*
+ * getwinvar() and gettabwinvar()
+ */
+ static void
+getwinvar(
+ typval_T *argvars,
+ typval_T *rettv,
+ int off) // 1 for gettabwinvar()
+{
+ char_u *varname;
+ tabpage_T *tp;
+ win_T *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]);
+
+ get_var_from(varname, rettv, &argvars[off + 2], 'w', tp, win, NULL);
+}
+
+/*
+ * Set option "varname" to the value of "varp" for the current buffer/window.
+ */
+ static void
+set_option_from_tv(char_u *varname, typval_T *varp)
+{
+ long numval = 0;
+ char_u *strval;
+ char_u nbuf[NUMBUFLEN];
+ int error = FALSE;
+
+ int opt_idx = findoption(varname);
+ if (opt_idx < 0)
+ {
+ semsg(_(e_unknown_option_str_2), varname);
+ return;
+ }
+ int opt_p_flags = get_option_flags(opt_idx);
+
+ if (varp->v_type == VAR_BOOL)
+ {
+ if (opt_p_flags & P_STRING)
+ {
+ emsg(_(e_string_required));
+ return;
+ }
+ numval = (long)varp->vval.v_number;
+ strval = (char_u *)"0"; // avoid using "false"
+ }
+ else
+ {
+ if ((opt_p_flags & (P_NUM|P_BOOL))
+ && (!in_vim9script() || varp->v_type != VAR_STRING))
+ numval = (long)tv_get_number_chk(varp, &error);
+ if (!error)
+ strval = tv_get_string_buf_chk(varp, nbuf);
+ }
+ if (!error && strval != NULL)
+ set_option_value_give_err(varname, numval, strval, OPT_LOCAL);
+}
+
+/*
+ * "setwinvar()" and "settabwinvar()" functions
+ */
+ static void
+setwinvar(typval_T *argvars, int off)
+{
+ win_T *win;
+ switchwin_T switchwin;
+ int need_switch_win;
+ char_u *varname, *winvarname;
+ typval_T *varp;
+ 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)
+ return;
+
+ need_switch_win = !(tp == curtab && win == curwin);
+ if (!need_switch_win
+ || switch_win(&switchwin, win, tp, TRUE) == OK)
+ {
+ if (*varname == '&')
+ set_option_from_tv(varname + 1, varp);
+ 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(&switchwin, 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_tv_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 *arg = 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(&arg, &tofree, TRUE, FALSE);
+ if (len > 0)
+ {
+ if (tofree != NULL)
+ name = tofree;
+ n = (eval_variable(name, len, 0, &tv, NULL,
+ EVAL_VAR_NOAUTOLOAD + EVAL_VAR_IMPORT) == OK);
+ if (n)
+ {
+ // handle d.key, l[idx], f(expr)
+ arg = skipwhite(arg);
+ n = (handle_subscript(&arg, name, &tv, &EVALARG_EVALUATE,
+ FALSE) == OK);
+ if (n)
+ clear_tv(&tv);
+ }
+ }
+ if (*arg != 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;
+
+ int
+alloc_redir_lval(void)
+{
+ redir_lval = ALLOC_CLEAR_ONE(lval_T);
+ if (redir_lval == NULL)
+ return FAIL;
+ return OK;
+}
+
+ void
+clear_redir_lval(void)
+{
+ VIM_CLEAR(redir_lval);
+}
+
+ void
+init_redir_ga(void)
+{
+ ga_init2(&redir_ga, sizeof(char), 500);
+}
+
+/*
+ * 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 called_emsg_before;
+ typval_T tv;
+
+ // Catch a bad name early.
+ if (!eval_isnamec1(*name))
+ {
+ emsg(_(e_invalid_argument));
+ 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;
+
+ if (alloc_redir_lval() == FAIL)
+ {
+ var_redir_stop();
+ return FAIL;
+ }
+
+ // The output is stored in growarray "redir_ga" until redirection ends.
+ init_redir_ga();
+
+ // 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
+ semsg(_(e_trailing_characters_str), redir_endp);
+ else
+ semsg(_(e_invalid_argument_str), name);
+ 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
+ called_emsg_before = called_emsg;
+ tv.v_type = VAR_STRING;
+ tv.vval.v_string = (char_u *)"";
+ if (append)
+ set_var_lval(redir_lval, redir_endp, &tv, TRUE,
+ ASSIGN_NO_DECL, (char_u *)".", 0);
+ else
+ set_var_lval(redir_lval, redir_endp, &tv, TRUE,
+ ASSIGN_NO_DECL, (char_u *)"=", 0);
+ clear_lval(redir_lval);
+ if (called_emsg > called_emsg_before)
+ {
+ 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, 0,
+ (char_u *)".", 0);
+ clear_lval(redir_lval);
+ }
+
+ // free the collected output
+ VIM_CLEAR(redir_ga.ga_data);
+
+ VIM_CLEAR(redir_lval);
+ }
+ VIM_CLEAR(redir_varname);
+}
+
+/*
+ * Get the collected redirected text and clear redir_ga.
+ */
+ char_u *
+get_clear_redir_ga(void)
+{
+ char_u *res;
+
+ ga_append(&redir_ga, NUL); // Append the trailing NUL.
+ res = redir_ga.ga_data;
+ redir_ga.ga_data = NULL;
+ return res;
+}
+
+/*
+ * "gettabvar()" function
+ */
+ void
+f_gettabvar(typval_T *argvars, typval_T *rettv)
+{
+ char_u *varname;
+ tabpage_T *tp;
+ win_T *win = NULL;
+
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ return;
+
+ varname = tv_get_string_chk(&argvars[1]);
+ tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL));
+ if (tp != NULL)
+ win = tp == curtab || tp->tp_firstwin == NULL ? firstwin
+ : tp->tp_firstwin;
+
+ get_var_from(varname, rettv, &argvars[2], 't', tp, win, NULL);
+}
+
+/*
+ * "gettabwinvar()" function
+ */
+ void
+f_gettabwinvar(typval_T *argvars, typval_T *rettv)
+{
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_number_arg(argvars, 1) == FAIL
+ || check_for_string_arg(argvars, 2) == FAIL))
+ return;
+
+ getwinvar(argvars, rettv, 1);
+}
+
+/*
+ * "getwinvar()" function
+ */
+ void
+f_getwinvar(typval_T *argvars, typval_T *rettv)
+{
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ return;
+
+ getwinvar(argvars, rettv, 0);
+}
+
+/*
+ * "getbufvar()" function
+ */
+ void
+f_getbufvar(typval_T *argvars, typval_T *rettv)
+{
+ char_u *varname;
+ buf_T *buf;
+
+ if (in_vim9script()
+ && (check_for_buffer_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ return;
+
+ varname = tv_get_string_chk(&argvars[1]);
+ buf = tv_get_buf_from_arg(&argvars[0]);
+
+ get_var_from(varname, rettv, &argvars[2], 'b', curtab, curwin, buf);
+}
+
+/*
+ * "settabvar()" function
+ */
+ void
+f_settabvar(typval_T *argvars, typval_T *rettv UNUSED)
+{
+ tabpage_T *save_curtab;
+ tabpage_T *tp;
+ char_u *varname, *tabvarname;
+ typval_T *varp;
+
+ if (check_secure())
+ return;
+
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ 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 || tp == NULL)
+ return;
+
+ 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 UNUSED)
+{
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_number_arg(argvars, 1) == FAIL
+ || check_for_string_arg(argvars, 2) == FAIL))
+ return;
+
+ setwinvar(argvars, 1);
+}
+
+/*
+ * "setwinvar()" function
+ */
+ void
+f_setwinvar(typval_T *argvars, typval_T *rettv UNUSED)
+{
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ return;
+
+ setwinvar(argvars, 0);
+}
+
+/*
+ * "setbufvar()" function
+ */
+ void
+f_setbufvar(typval_T *argvars, typval_T *rettv UNUSED)
+{
+ buf_T *buf;
+ char_u *varname, *bufvarname;
+ typval_T *varp;
+
+ if (check_secure())
+ return;
+
+ if (in_vim9script()
+ && (check_for_buffer_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL))
+ return;
+
+ varname = tv_get_string_chk(&argvars[1]);
+ buf = tv_get_buf_from_arg(&argvars[0]);
+ varp = &argvars[2];
+
+ if (buf == NULL || varname == NULL)
+ return;
+
+ if (*varname == '&')
+ {
+ aco_save_T aco;
+
+ // Set curbuf to be our buf, temporarily.
+ aucmd_prepbuf(&aco, buf);
+ if (curbuf == buf)
+ {
+ // Only when it worked to set "curbuf".
+ set_option_from_tv(varname + 1, varp);
+
+ // reset notion of buffer
+ aucmd_restbuf(&aco);
+ }
+ }
+ else
+ {
+ bufvarname = alloc(STRLEN(varname) + 3);
+ if (bufvarname != NULL)
+ {
+ buf_T *save_curbuf = curbuf;
+
+ 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 "res.cb_name" is set to an empty string.
+ * If "res.cb_name" is allocated then "res.cb_free_name" is set to TRUE.
+ * "res.cb_name" is set to NULL for an invalid argument.
+ */
+ callback_T
+get_callback(typval_T *arg)
+{
+ callback_T res;
+ int r = OK;
+
+ CLEAR_FIELD(res);
+ 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
+ {
+ if (arg->v_type == VAR_STRING && arg->vval.v_string != NULL
+ && SAFE_isdigit(*arg->vval.v_string))
+ r = FAIL;
+ else if (arg->v_type == VAR_FUNC || arg->v_type == VAR_STRING)
+ {
+ res.cb_name = arg->vval.v_string;
+ if (arg->v_type == VAR_STRING)
+ {
+ char_u *name = get_scriptlocal_funcname(arg->vval.v_string);
+ if (name != NULL)
+ {
+ res.cb_name = name;
+ res.cb_free_name = TRUE;
+ }
+ }
+ func_ref(res.cb_name);
+ }
+ else if (arg->v_type == VAR_NUMBER && arg->vval.v_number == 0)
+ res.cb_name = (char_u *)"";
+ else
+ r = FAIL;
+
+ if (r == FAIL)
+ {
+ emsg(_(e_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;
+}
+
+/*
+ * Copy callback from "src" to "dest", incrementing the refcounts.
+ */
+ void
+copy_callback(callback_T *dest, callback_T *src)
+{
+ dest->cb_partial = src->cb_partial;
+ if (dest->cb_partial != NULL)
+ {
+ dest->cb_name = src->cb_name;
+ dest->cb_free_name = FALSE;
+ ++dest->cb_partial->pt_refcount;
+ }
+ else
+ {
+ dest->cb_name = vim_strsave(src->cb_name);
+ dest->cb_free_name = TRUE;
+ func_ref(src->cb_name);
+ }
+}
+
+/*
+ * When a callback refers to an autoload import, change the function name to
+ * the "path#name" form. Uses the current script context.
+ * Only works when the name is allocated.
+ */
+ void
+expand_autload_callback(callback_T *cb)
+{
+ char_u *name;
+ char_u *p;
+ imported_T *import;
+
+ if (!in_vim9script() || cb->cb_name == NULL
+ || (!cb->cb_free_name
+ && (cb->cb_partial == NULL || cb->cb_partial->pt_name == NULL)))
+ return;
+ if (cb->cb_partial != NULL)
+ name = cb->cb_partial->pt_name;
+ else
+ name = cb->cb_name;
+ p = vim_strchr(name, '.');
+ if (p == NULL)
+ return;
+
+ import = find_imported(name, p - name, FALSE);
+ if (import == NULL || !SCRIPT_ID_VALID(import->imp_sid))
+ return;
+
+ scriptitem_T *si = SCRIPT_ITEM(import->imp_sid);
+ if (si->sn_autoload_prefix == NULL)
+ return;
+
+ char_u *newname = concat_str(si->sn_autoload_prefix, p + 1);
+ if (newname == NULL)
+ return;
+
+ if (cb->cb_partial != NULL)
+ {
+ if (cb->cb_name == cb->cb_partial->pt_name)
+ cb->cb_name = newname;
+ vim_free(cb->cb_partial->pt_name);
+ cb->cb_partial->pt_name = newname;
+ }
+ else
+ {
+ vim_free(cb->cb_name);
+ cb->cb_name = newname;
+ }
+}
+
+/*
+ * 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