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evalvars.c
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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("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},
};
// 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("INTERNAL: name too long, increase size of dictitem16_T");
getout(1);
}
STRCPY(p->vv_di.di_key, p->vv_name);
if (p->vv_flags & VV_RO)
p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
else if (p->vv_flags & VV_RO_SBX)
p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
else
p->vv_di.di_flags = DI_FLAGS_FIX;
// add to v: scope dict, unless the value is not always available
if (p->vv_tv_type != VAR_UNKNOWN)
hash_add(&vimvarht, p->vv_di.di_key);
if (p->vv_flags & VV_COMPAT)
// add to compat scope dict
hash_add(&compat_hashtab, p->vv_di.di_key);
}
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_ECHOSPACE, sc_col - 1);
set_vim_var_dict(VV_COLORNAMES, dict_alloc());
// 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)
{
tvp = alloc_string_tv(val);
if (tvp != NULL)
{
set_var(name, tvp, FALSE);
free_tv(tvp);
}
}
}
int
eval_charconvert(
char_u *enc_from,
char_u *enc_to,
char_u *fname_from,
char_u *fname_to)
{
int err = FALSE;
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);
}
/*
* 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)
{
hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
if (HASHITEM_EMPTY(hi))
internal_error("restore_vimvar()");
else
hash_remove(&vimvarht, hi);
}
}
/*
* List Vim variables.
*/
static void
list_vim_vars(int *first)
{
list_hashtable_vars(&vimvarht, "v:", FALSE, first);
}
/*
* List script-local variables, if there is a script.
*/
static void
list_script_vars(int *first)
{
if (SCRIPT_ID_VALID(current_sctx.sc_sid))
list_hashtable_vars(&SCRIPT_VARS(current_sctx.sc_sid),
"s:", FALSE, first);
}
/*
* Return TRUE if "name" starts with "g:", "w:", "t:" or "b:".
* But only when an identifier character follows.
*/
int
is_scoped_variable(char_u *name)
{
return vim_strchr((char_u *)"gwbt", name[0]) != NULL
&& name[1] == ':'
&& eval_isnamec(name[2]);
}
/*
* Evaluate one Vim expression {expr} in string "p" and append the
* resulting string to "gap". "p" points to the opening "{".
* When "evaluate" is FALSE only skip over the expression.
* Return a pointer to the character after "}", NULL for an error.
*/
char_u *
eval_one_expr_in_str(char_u *p, garray_T *gap, int evaluate)
{
char_u *block_start = skipwhite(p + 1); // skip the opening {
char_u *block_end = block_start;
char_u *expr_val;
if (*block_start == NUL)
{
semsg(_(e_missing_close_curly_str), p);
return NULL;
}
if (skip_expr(&block_end, NULL) == FAIL)
return NULL;
block_end = skipwhite(block_end);
if (*block_end != '}')
{
semsg(_(e_missing_close_curly_str), p);
return NULL;
}
if (evaluate)
{
*block_end = NUL;
expr_val = eval_to_string(block_start, TRUE, FALSE);
*block_end = '}';
if (expr_val == NULL)
return NULL;
ga_concat(gap, expr_val);
vim_free(expr_val);
}
return block_end + 1;
}
/*
* Evaluate all the Vim expressions {expr} in "str" and return the resulting
* string in allocated memory. "{{" is reduced to "{" and "}}" to "}".
* Used for a heredoc assignment.
* Returns NULL for an error.
*/
static char_u *
eval_all_expr_in_str(char_u *str)
{
garray_T ga;
char_u *p;
ga_init2(&ga, 1, 80);
p = str;
while (*p != NUL)
{
char_u *lit_start;
int escaped_brace = FALSE;
// Look for a block start.
lit_start = p;
while (*p != '{' && *p != '}' && *p != NUL)
++p;
if (*p != NUL && *p == p[1])
{
// Escaped brace, unescape and continue.
// Include the brace in the literal string.
++p;
escaped_brace = TRUE;
}
else if (*p == '}')
{
semsg(_(e_stray_closing_curly_str), str);
ga_clear(&ga);
return NULL;
}
// Append the literal part.
ga_concat_len(&ga, lit_start, (size_t)(p - lit_start));
if (*p == NUL)
break;
if (escaped_brace)
{
// Skip the second brace.
++p;
continue;
}
// Evaluate the expression and append the result.
p = eval_one_expr_in_str(p, &ga, TRUE);
if (p == NULL)
{
ga_clear(&ga);
return NULL;
}
}
ga_append(&ga, NUL);
return ga.ga_data;
}
/*
* Get a list of lines from a HERE document. The here document is a list of
* lines surrounded by a marker.
* cmd << {marker}
* {line1}
* {line2}
* ....
* {marker}
*
* The {marker} is a string. If the optional 'trim' word is supplied before the
* marker, then the leading indentation before the lines (matching the
* indentation in the "cmd" line) is stripped.
*
* When getting lines for an embedded script (e.g. python, lua, perl, ruby,
* tcl, mzscheme), "script_get" is set to TRUE. In this case, if the marker is
* missing, then '.' is accepted as a marker.
*
* When compiling a heredoc assignment to a variable in a Vim9 def function,
* "vim9compile" is set to TRUE. In this case, instead of generating a list of
* string values from the heredoc, vim9 instructions are generated. On success
* the returned list will be empty.
*
* Returns a List with {lines} or NULL on failure.
*/
list_T *
heredoc_get(exarg_T *eap, char_u *cmd, int script_get, int vim9compile)
{
char_u *theline = NULL;
char_u *marker;
list_T *l;
char_u *p;
char_u *str;
int marker_indent_len = 0;
int text_indent_len = 0;
char_u *text_indent = NULL;
char_u dot[] = ".";
int comment_char = in_vim9script() ? '#' : '"';
int evalstr = FALSE;
int eval_failed = FALSE;
cctx_T *cctx = vim9compile ? eap->cookie : NULL;
int count = 0;
if (eap->getline == NULL)
{
emsg(_(e_cannot_use_heredoc_here));
return NULL;
}
// Check for the optional 'trim' word before the marker
cmd = skipwhite(cmd);
while (TRUE)
{
if (STRNCMP(cmd, "trim", 4) == 0
&& (cmd[4] == NUL || VIM_ISWHITE(cmd[4])))
{
cmd = skipwhite(cmd + 4);
// Trim the indentation from all the lines in the here document.
// The amount of indentation trimmed is the same as the indentation
// of the first line after the :let command line. To find the end
// marker the indent of the :let command line is trimmed.
p = *eap->cmdlinep;
while (VIM_ISWHITE(*p))
{
p++;
marker_indent_len++;
}
text_indent_len = -1;
continue;
}
if (STRNCMP(cmd, "eval", 4) == 0
&& (cmd[4] == NUL || VIM_ISWHITE(cmd[4])))
{
cmd = skipwhite(cmd + 4);
evalstr = TRUE;
continue;
}
break;
}
// The marker is the next word.
if (*cmd != NUL && *cmd != comment_char)
{
marker = skipwhite(cmd);
p = skiptowhite(marker);
if (*skipwhite(p) != NUL && *skipwhite(p) != comment_char)
{
semsg(_(e_trailing_characters_str), p);
return NULL;
}
*p = NUL;
if (!script_get && vim_islower(*marker))
{
emsg(_(e_marker_cannot_start_with_lower_case_letter));
return NULL;
}
}
else
{
// When getting lines for an embedded script, if the marker is missing,
// accept '.' as the marker.
if (script_get)
marker = dot;
else
{
emsg(_(e_missing_marker));
return NULL;
}
}
l = list_alloc();
if (l == NULL)
return NULL;
for (;;)
{
int mi = 0;
int ti = 0;
vim_free(theline);
theline = eap->getline(NUL, eap->cookie, 0, FALSE);
if (theline == NULL)
{
semsg(_(e_missing_end_marker_str), marker);
break;
}
// with "trim": skip the indent matching the :let line to find the
// marker
if (marker_indent_len > 0
&& STRNCMP(theline, *eap->cmdlinep, marker_indent_len) == 0)
mi = marker_indent_len;
if (STRCMP(marker, theline + mi) == 0)
break;
// If expression evaluation failed in the heredoc, then skip till the
// end marker.
if (eval_failed)
continue;
if (text_indent_len == -1 && *theline != NUL)
{
// set the text indent from the first line.
p = theline;
text_indent_len = 0;
while (VIM_ISWHITE(*p))
{
p++;
text_indent_len++;
}
text_indent = vim_strnsave(theline, text_indent_len);
}
// with "trim": skip the indent matching the first line
if (text_indent != NULL)
for (ti = 0; ti < text_indent_len; ++ti)
if (theline[ti] != text_indent[ti])
break;
str = theline + ti;
if (vim9compile)
{
if (compile_all_expr_in_str(str, evalstr, cctx) == FAIL)
{
vim_free(theline);
vim_free(text_indent);
return FAIL;
}
count++;
}
else
{
if (evalstr && !eap->skip)
{
str = eval_all_expr_in_str(str);
if (str == NULL)
{
// expression evaluation failed
eval_failed = TRUE;
continue;
}
vim_free(theline);
theline = str;
}
if (list_append_string(l, str, -1) == FAIL)
break;
}
}
vim_free(theline);
vim_free(text_indent);
if (vim9compile && cctx->ctx_skip != SKIP_YES && !eval_failed)
generate_NEWLIST(cctx, count, FALSE);
if (eval_failed)
{
// expression evaluation in the heredoc failed
list_free(l);
return NULL;
}
return l;
}
/*
* Vim9 variable declaration:
* ":var name"
* ":var name: type"
* ":var name = expr"
* ":var name: type = expr"
* etc.
*/
void
ex_var(exarg_T *eap)
{
char_u *p = eap->cmd;
int has_var;
if (!in_vim9script())
{
semsg(_(e_str_cannot_be_used_in_legacy_vim_script), ":var");
return;
}
has_var = checkforcmd_noparen(&p, "var", 3);
if (current_sctx.sc_sid == 0 && has_var)
{
emsg(_(e_cannot_declare_variable_on_command_line));
return;
}
ex_let(eap);
}
/*
* ":let" list all variable values
* ":let var1 var2" list variable values
* ":let var = expr" assignment command.
* ":let var += expr" assignment command.
* ":let var -= expr" assignment command.
* ":let var *= expr" assignment command.
* ":let var /= expr" assignment command.
* ":let var %= expr" assignment command.
* ":let var .= expr" assignment command.
* ":let var ..= expr" assignment command.
* ":let [var1, var2] = expr" unpack list.
* ":let var =<< ..." heredoc
* ":let var: string" Vim9 declaration
*
* ":final var = expr" assignment command.
* ":final [var1, var2] = expr" unpack list.
*
* ":const" list all variable values
* ":const var1 var2" list variable values
* ":const var = expr" assignment command.
* ":const [var1, var2] = expr" unpack list.
*/
void
ex_let(exarg_T *eap)
{
char_u *arg = eap->arg;
char_u *expr = NULL;
typval_T rettv;
int i;
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)
{