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vim/src/evalvars.c
John Marriott b32800f7c5
patch 9.1.1063: too many strlen() calls in userfunc.c 
Problem:  too many strlen() calls in userfunc.c
Solution: refactor userfunc.c and remove calls to strlen(),
          drop set_ufunc_name() and roll it into alloc_ufunc(),
          check for out-of-memory condition in trans_function_name_ext()
          (John Marriott)

closes: #16537

Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2025-02-01 15:25:34 +01:00

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/* 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},
{VV_NAME("t_enum", VAR_NUMBER), NULL, VV_RO},
{VV_NAME("t_enumvalue", VAR_NUMBER), NULL, VV_RO},
{VV_NAME("stacktrace", VAR_LIST), &t_list_dict_any, 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_TYPE_ENUM, VAR_TYPE_ENUM);
set_vim_var_nr(VV_TYPE_ENUMVALUE, VAR_TYPE_ENUMVALUE);
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, FALSE, 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;
int heredoc_in_string = FALSE;
char_u *line_arg = NULL;
char_u *nl_ptr = vim_strchr(cmd, '\n');
if (nl_ptr != NULL)
{
heredoc_in_string = TRUE;
line_arg = nl_ptr + 1;
*nl_ptr = NUL;
}
else 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;
if (heredoc_in_string)
{
char_u *next_line;
// heredoc in a string separated by newlines. Get the next line
// from the string.
if (*line_arg == NUL)
{
semsg(_(e_missing_end_marker_str), marker);
break;
}
theline = line_arg;
next_line = vim_strchr(theline, '\n');
if (next_line == NULL)
line_arg += STRLEN(line_arg);
else
{
*next_line = NUL;
line_arg = next_line + 1;
}
}
else
{
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
{
int free_str = FALSE;
if (evalstr && !eap->skip)
{
str = eval_all_expr_in_str(str);
if (str == NULL)
{
// expression evaluation failed
eval_failed = TRUE;
continue;
}
free_str = TRUE;
}
if (list_append_string(l, str, -1) == FAIL)
break;
if (free_str)
vim_free(str);
}
}
if (heredoc_in_string)
// Next command follows the heredoc in the string.
eap->nextcmd = line_arg;
else
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_strnsave(ufunc->uf_name, ufunc->uf_namelen);
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;
}
}
}
// and finally try
return find_var_autoload_prefix(name, 0, htp, NULL);
}
/*
* Find variable "name" with sn_autoload_prefix.
* Return a pointer to it if found, NULL if not found.
* When "sid" > 0, use it otherwise use "current_sctx.sc_sid".
* When "htp" is not NULL set "htp" to the hashtab_T used.
* When "namep" is not NULL set "namep" to the generated name, and
* then the caller gets ownership and is responsible for freeing the name.
*/
dictitem_T *
find_var_autoload_prefix(char_u *name, int sid, hashtab_T **htp,
char_u **namep)
{
hashtab_T *ht;
dictitem_T *ret = NULL;
// When using "vim9script autoload" script-local items are prefixed but can
// be used with s:name.
int check_sid = sid > 0 ? sid : current_sctx.sc_sid;
if (SCRIPT_ID_VALID(check_sid)
&& (in_vim9script() || (name[0] == 's' && name[1] == ':')))
{
scriptitem_T *si = SCRIPT_ITEM(check_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)
{
int free_auto_name = TRUE;
ht = &globvarht;
ret = find_var_in_ht(ht, 'g', auto_name, TRUE);
if (ret != NULL)
{
if (htp != NULL)
*htp = ht;
if (namep != NULL)
{
free_auto_name = FALSE;
*namep = auto_name;
}
}
if (free_auto_name)
vim_free(auto_name);
}
}
}
return ret;
}
/*
* 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 autoload-exported
if (res == FAIL && find_var_autoload_prefix(p, 0, NULL, NULL) != NULL)
res = OK;
// if not script-local or autoload, 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.
*/
int
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
int rc = FAIL;
if (sid != 0)
{
varname = NULL;
if (SCRIPT_ID_VALID(sid))
{
char_u *auto_name = NULL;
if (find_var_autoload_prefix(name, sid, &ht, &auto_name) != NULL)
{
var_in_autoload = TRUE;
varname = auto_name;
name_tofree = varname;
}
else
ht = &SCRIPT_VARS(sid);
}
if (varname == NULL)
varname = name;
}
else
{
scriptitem_T *si;
char_u *auto_name = NULL;
if (in_vim9script()
&& SCRIPT_ID_VALID(current_sctx.sc_sid)
&& (si = SCRIPT_ITEM(current_sctx.sc_sid))
->sn_autoload_prefix != NULL
&& (is_export
|| find_var_autoload_prefix(name, 0, NULL, &auto_name)
!= NULL))
{
// In a vim9 autoload script an exported variable is put in the
// global namespace with the autoload prefix.
var_in_autoload = TRUE;
varname = auto_name != NULL ? auto_name
: 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;
// List and Blob types can be modified in-place using the "+="
// compound operator. For other types, this is not allowed.
int type_inplace_modifiable =
(di->di_tv.v_type == VAR_LIST || di->di_tv.v_type == VAR_BLOB);
if (var_in_vim9script && (flags & ASSIGN_FOR_LOOP) == 0
&& ((flags & ASSIGN_COMPOUND_OP) == 0
|| !type_inplace_modifiable))
{
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;
}
}
// Modifying a final variable with a List value using the "+="
// operator is allowed. For other types, it is not allowed.
if ((((flags & ASSIGN_FOR_LOOP) == 0 || (flags & ASSIGN_DECL) == 0)
&& ((flags & ASSIGN_COMPOUND_OP) == 0
|| !type_inplace_modifiable))
? 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);
rc = OK;
failed:
vim_free(name_tofree);
if (free_tv_arg)
clear_tv(tv_arg);
return rc;
}
/*
* Check in this order for backwards compatibility:
* - Whether the variable is read-only
* - Whether the variable value is locked
* - Whether the variable is locked
* NOTE: "name" is only used for error messages.
*/
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;
tabpage_T *save_lu_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;
save_lu_tp = lastused_tabpage;
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 and last accessed tabpage.
if (valid_tabpage(save_curtab))
{
goto_tabpage_tp(save_curtab, FALSE, FALSE);
if (valid_tabpage(save_lu_tp))
lastused_tabpage = save_lu_tp;
}
}
/*
* "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;
// safe the current window position, it could
// change because of 'scrollbind' window-local
// options
linenr_T old_topline = curwin->w_topline;
// 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);
}
curwin->w_topline = old_topline;
}
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
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