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vim/src/eval.c
Bram Moolenaar 2e17fef225 patch 8.2.4589: cannot index the g: dictionary 
Problem:    Cannot index the g: dictionary.
Solution:   Recognize using "g:[key]". (closes #9969)
2022-03-18 19:44:48 +00:00

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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.
*/
/*
* eval.c: Expression evaluation.
*/
#define USING_FLOAT_STUFF
#include "vim.h"
#if defined(FEAT_EVAL) || defined(PROTO)
#ifdef VMS
# include <float.h>
#endif
#define NAMESPACE_CHAR (char_u *)"abglstvw"
/*
* When recursively copying lists and dicts we need to remember which ones we
* have done to avoid endless recursiveness. This unique ID is used for that.
* The last bit is used for previous_funccal, ignored when comparing.
*/
static int current_copyID = 0;
/*
* Info used by a ":for" loop.
*/
typedef struct
{
int fi_semicolon; // TRUE if ending in '; var]'
int fi_varcount; // nr of variables in the list
int fi_break_count; // nr of line breaks encountered
listwatch_T fi_lw; // keep an eye on the item used.
list_T *fi_list; // list being used
int fi_bi; // index of blob
blob_T *fi_blob; // blob being used
char_u *fi_string; // copy of string being used
int fi_byte_idx; // byte index in fi_string
} forinfo_T;
static int eval2(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
static int eval3(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
static int eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
static int eval5(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
static int eval6(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string);
static int eval7t(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string);
static int eval7(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int want_string);
static int eval7_leader(typval_T *rettv, int numeric_only, char_u *start_leader, char_u **end_leaderp);
static int free_unref_items(int copyID);
static char_u *make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end);
/*
* Return "n1" divided by "n2", taking care of dividing by zero.
* If "failed" is not NULL set it to TRUE when dividing by zero fails.
*/
varnumber_T
num_divide(varnumber_T n1, varnumber_T n2, int *failed)
{
varnumber_T result;
if (n2 == 0)
{
if (in_vim9script())
{
emsg(_(e_divide_by_zero));
if (failed != NULL)
*failed = TRUE;
}
if (n1 == 0)
result = VARNUM_MIN; // similar to NaN
else if (n1 < 0)
result = -VARNUM_MAX;
else
result = VARNUM_MAX;
}
else
result = n1 / n2;
return result;
}
/*
* Return "n1" modulus "n2", taking care of dividing by zero.
* If "failed" is not NULL set it to TRUE when dividing by zero fails.
*/
varnumber_T
num_modulus(varnumber_T n1, varnumber_T n2, int *failed)
{
if (n2 == 0 && in_vim9script())
{
emsg(_(e_divide_by_zero));
if (failed != NULL)
*failed = TRUE;
}
return (n2 == 0) ? 0 : (n1 % n2);
}
/*
* Initialize the global and v: variables.
*/
void
eval_init(void)
{
evalvars_init();
func_init();
}
#if defined(EXITFREE) || defined(PROTO)
void
eval_clear(void)
{
evalvars_clear();
free_scriptnames(); // must come after evalvars_clear().
free_locales();
// autoloaded script names
free_autoload_scriptnames();
// unreferenced lists and dicts
(void)garbage_collect(FALSE);
// functions not garbage collected
free_all_functions();
}
#endif
void
fill_evalarg_from_eap(evalarg_T *evalarg, exarg_T *eap, int skip)
{
init_evalarg(evalarg);
evalarg->eval_flags = skip ? 0 : EVAL_EVALUATE;
if (eap != NULL)
{
evalarg->eval_cstack = eap->cstack;
if (getline_equal(eap->getline, eap->cookie, getsourceline))
{
evalarg->eval_getline = eap->getline;
evalarg->eval_cookie = eap->cookie;
}
}
}
/*
* Top level evaluation function, returning a boolean.
* Sets "error" to TRUE if there was an error.
* Return TRUE or FALSE.
*/
int
eval_to_bool(
char_u *arg,
int *error,
exarg_T *eap,
int skip) // only parse, don't execute
{
typval_T tv;
varnumber_T retval = FALSE;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, skip);
if (skip)
++emsg_skip;
if (eval0(arg, &tv, eap, &evalarg) == FAIL)
*error = TRUE;
else
{
*error = FALSE;
if (!skip)
{
if (in_vim9script())
retval = tv_get_bool_chk(&tv, error);
else
retval = (tv_get_number_chk(&tv, error) != 0);
clear_tv(&tv);
}
}
if (skip)
--emsg_skip;
clear_evalarg(&evalarg, eap);
return (int)retval;
}
/*
* Call eval1() and give an error message if not done at a lower level.
*/
static int
eval1_emsg(char_u **arg, typval_T *rettv, exarg_T *eap)
{
char_u *start = *arg;
int ret;
int did_emsg_before = did_emsg;
int called_emsg_before = called_emsg;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip);
ret = eval1(arg, rettv, &evalarg);
if (ret == FAIL)
{
// Report the invalid expression unless the expression evaluation has
// been cancelled due to an aborting error, an interrupt, or an
// exception, or we already gave a more specific error.
// Also check called_emsg for when using assert_fails().
if (!aborting() && did_emsg == did_emsg_before
&& called_emsg == called_emsg_before)
semsg(_(e_invalid_expression_str), start);
}
clear_evalarg(&evalarg, eap);
return ret;
}
/*
* Return whether a typval is a valid expression to pass to eval_expr_typval()
* or eval_expr_to_bool(). An empty string returns FALSE;
*/
int
eval_expr_valid_arg(typval_T *tv)
{
return tv->v_type != VAR_UNKNOWN
&& (tv->v_type != VAR_STRING
|| (tv->vval.v_string != NULL && *tv->vval.v_string != NUL));
}
/*
* Evaluate an expression, which can be a function, partial or string.
* Pass arguments "argv[argc]".
* Return the result in "rettv" and OK or FAIL.
*/
int
eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv)
{
char_u *s;
char_u buf[NUMBUFLEN];
funcexe_T funcexe;
if (expr->v_type == VAR_FUNC)
{
s = expr->vval.v_string;
if (s == NULL || *s == NUL)
return FAIL;
CLEAR_FIELD(funcexe);
funcexe.fe_evaluate = TRUE;
if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL)
return FAIL;
}
else if (expr->v_type == VAR_PARTIAL)
{
partial_T *partial = expr->vval.v_partial;
if (partial == NULL)
return FAIL;
if (partial->pt_func != NULL
&& partial->pt_func->uf_def_status != UF_NOT_COMPILED)
{
if (call_def_function(partial->pt_func, argc, argv,
partial, rettv) == FAIL)
return FAIL;
}
else
{
s = partial_name(partial);
if (s == NULL || *s == NUL)
return FAIL;
CLEAR_FIELD(funcexe);
funcexe.fe_evaluate = TRUE;
funcexe.fe_partial = partial;
if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL)
return FAIL;
}
}
else if (expr->v_type == VAR_INSTR)
{
return exe_typval_instr(expr, rettv);
}
else
{
s = tv_get_string_buf_chk_strict(expr, buf, in_vim9script());
if (s == NULL)
return FAIL;
s = skipwhite(s);
if (eval1_emsg(&s, rettv, NULL) == FAIL)
return FAIL;
if (*skipwhite(s) != NUL) // check for trailing chars after expr
{
clear_tv(rettv);
semsg(_(e_invalid_expression_str), s);
return FAIL;
}
}
return OK;
}
/*
* Like eval_to_bool() but using a typval_T instead of a string.
* Works for string, funcref and partial.
*/
int
eval_expr_to_bool(typval_T *expr, int *error)
{
typval_T rettv;
int res;
if (eval_expr_typval(expr, NULL, 0, &rettv) == FAIL)
{
*error = TRUE;
return FALSE;
}
res = (tv_get_bool_chk(&rettv, error) != 0);
clear_tv(&rettv);
return res;
}
/*
* Top level evaluation function, returning a string. If "skip" is TRUE,
* only parsing to "nextcmd" is done, without reporting errors. Return
* pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
*/
char_u *
eval_to_string_skip(
char_u *arg,
exarg_T *eap,
int skip) // only parse, don't execute
{
typval_T tv;
char_u *retval;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, skip);
if (skip)
++emsg_skip;
if (eval0(arg, &tv, eap, &evalarg) == FAIL || skip)
retval = NULL;
else
{
retval = vim_strsave(tv_get_string(&tv));
clear_tv(&tv);
}
if (skip)
--emsg_skip;
clear_evalarg(&evalarg, eap);
return retval;
}
/*
* Skip over an expression at "*pp".
* Return FAIL for an error, OK otherwise.
*/
int
skip_expr(char_u **pp, evalarg_T *evalarg)
{
typval_T rettv;
*pp = skipwhite(*pp);
return eval1(pp, &rettv, evalarg);
}
/*
* Skip over an expression at "*arg".
* If in Vim9 script and line breaks are encountered, the lines are
* concatenated. "evalarg->eval_tofree" will be set accordingly.
* "arg" is advanced to just after the expression.
* "start" is set to the start of the expression, "end" to just after the end.
* Also when the expression is copied to allocated memory.
* Return FAIL for an error, OK otherwise.
*/
int
skip_expr_concatenate(
char_u **arg,
char_u **start,
char_u **end,
evalarg_T *evalarg)
{
typval_T rettv;
int res;
int vim9script = in_vim9script();
garray_T *gap = evalarg == NULL ? NULL : &evalarg->eval_ga;
garray_T *freegap = evalarg == NULL ? NULL : &evalarg->eval_freega;
int save_flags = evalarg == NULL ? 0 : evalarg->eval_flags;
int evaluate = evalarg == NULL
? FALSE : (evalarg->eval_flags & EVAL_EVALUATE);
if (vim9script && evaluate
&& (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL))
{
ga_init2(gap, sizeof(char_u *), 10);
// leave room for "start"
if (ga_grow(gap, 1) == OK)
++gap->ga_len;
ga_init2(freegap, sizeof(char_u *), 10);
}
*start = *arg;
// Don't evaluate the expression.
if (evalarg != NULL)
evalarg->eval_flags &= ~EVAL_EVALUATE;
*arg = skipwhite(*arg);
res = eval1(arg, &rettv, evalarg);
*end = *arg;
if (evalarg != NULL)
evalarg->eval_flags = save_flags;
if (vim9script && evaluate
&& (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL))
{
if (evalarg->eval_ga.ga_len == 1)
{
// just the one line, no need to concatenate
ga_clear(gap);
gap->ga_itemsize = 0;
}
else
{
char_u *p;
size_t endoff = STRLEN(*arg);
// Line breaks encountered, concatenate all the lines.
*((char_u **)gap->ga_data) = *start;
p = ga_concat_strings(gap, " ");
// free the lines only when using getsourceline()
if (evalarg->eval_cookie != NULL)
{
// Do not free the first line, the caller can still use it.
*((char_u **)gap->ga_data) = NULL;
// Do not free the last line, "arg" points into it, free it
// later.
vim_free(evalarg->eval_tofree);
evalarg->eval_tofree =
((char_u **)gap->ga_data)[gap->ga_len - 1];
((char_u **)gap->ga_data)[gap->ga_len - 1] = NULL;
ga_clear_strings(gap);
}
else
{
ga_clear(gap);
// free lines that were explicitly marked for freeing
ga_clear_strings(freegap);
}
gap->ga_itemsize = 0;
if (p == NULL)
return FAIL;
*start = p;
vim_free(evalarg->eval_tofree_lambda);
evalarg->eval_tofree_lambda = p;
// Compute "end" relative to the end.
*end = *start + STRLEN(*start) - endoff;
}
}
return res;
}
/*
* Convert "tv" to a string.
* When "convert" is TRUE convert a List into a sequence of lines and convert
* a Float to a String.
* Returns an allocated string (NULL when out of memory).
*/
char_u *
typval2string(typval_T *tv, int convert)
{
garray_T ga;
char_u *retval;
#ifdef FEAT_FLOAT
char_u numbuf[NUMBUFLEN];
#endif
if (convert && tv->v_type == VAR_LIST)
{
ga_init2(&ga, sizeof(char), 80);
if (tv->vval.v_list != NULL)
{
list_join(&ga, tv->vval.v_list, (char_u *)"\n", TRUE, FALSE, 0);
if (tv->vval.v_list->lv_len > 0)
ga_append(&ga, NL);
}
ga_append(&ga, NUL);
retval = (char_u *)ga.ga_data;
}
#ifdef FEAT_FLOAT
else if (convert && tv->v_type == VAR_FLOAT)
{
vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float);
retval = vim_strsave(numbuf);
}
#endif
else
retval = vim_strsave(tv_get_string(tv));
return retval;
}
/*
* Top level evaluation function, returning a string. Does not handle line
* breaks.
* When "convert" is TRUE convert a List into a sequence of lines and convert
* a Float to a String.
* Return pointer to allocated memory, or NULL for failure.
*/
char_u *
eval_to_string_eap(
char_u *arg,
int convert,
exarg_T *eap)
{
typval_T tv;
char_u *retval;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip);
if (eval0(arg, &tv, NULL, &evalarg) == FAIL)
retval = NULL;
else
{
retval = typval2string(&tv, convert);
clear_tv(&tv);
}
clear_evalarg(&evalarg, NULL);
return retval;
}
char_u *
eval_to_string(
char_u *arg,
int convert)
{
return eval_to_string_eap(arg, convert, NULL);
}
/*
* Call eval_to_string() without using current local variables and using
* textwinlock. When "use_sandbox" is TRUE use the sandbox.
* Use legacy Vim script syntax.
*/
char_u *
eval_to_string_safe(
char_u *arg,
int use_sandbox,
int keep_script_version)
{
char_u *retval;
funccal_entry_T funccal_entry;
int save_sc_version = current_sctx.sc_version;
int save_garbage = may_garbage_collect;
if (!keep_script_version)
current_sctx.sc_version = 1;
save_funccal(&funccal_entry);
if (use_sandbox)
++sandbox;
++textwinlock;
may_garbage_collect = FALSE;
retval = eval_to_string(arg, FALSE);
if (use_sandbox)
--sandbox;
--textwinlock;
may_garbage_collect = save_garbage;
restore_funccal();
current_sctx.sc_version = save_sc_version;
return retval;
}
/*
* Top level evaluation function, returning a number.
* Evaluates "expr" silently.
* Returns -1 for an error.
*/
varnumber_T
eval_to_number(char_u *expr)
{
typval_T rettv;
varnumber_T retval;
char_u *p = skipwhite(expr);
++emsg_off;
if (eval1(&p, &rettv, &EVALARG_EVALUATE) == FAIL)
retval = -1;
else
{
retval = tv_get_number_chk(&rettv, NULL);
clear_tv(&rettv);
}
--emsg_off;
return retval;
}
/*
* Top level evaluation function.
* Returns an allocated typval_T with the result.
* Returns NULL when there is an error.
*/
typval_T *
eval_expr(char_u *arg, exarg_T *eap)
{
typval_T *tv;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, eap != NULL && eap->skip);
tv = ALLOC_ONE(typval_T);
if (tv != NULL && eval0(arg, tv, eap, &evalarg) == FAIL)
VIM_CLEAR(tv);
clear_evalarg(&evalarg, eap);
return tv;
}
/*
* "*arg" points to what can be a function name in the form of "import.Name" or
* "Funcref". Return the name of the function. Set "tofree" to something that
* was allocated.
* If "verbose" is FALSE no errors are given.
* Return NULL for any failure.
*/
static char_u *
deref_function_name(
char_u **arg,
char_u **tofree,
evalarg_T *evalarg,
int verbose)
{
typval_T ref;
char_u *name = *arg;
ref.v_type = VAR_UNKNOWN;
if (eval7(arg, &ref, evalarg, FALSE) == FAIL)
return NULL;
if (*skipwhite(*arg) != NUL)
{
if (verbose)
semsg(_(e_trailing_characters_str), *arg);
name = NULL;
}
else if (ref.v_type == VAR_FUNC && ref.vval.v_string != NULL)
{
name = ref.vval.v_string;
ref.vval.v_string = NULL;
*tofree = name;
}
else if (ref.v_type == VAR_PARTIAL && ref.vval.v_partial != NULL)
{
if (ref.vval.v_partial->pt_argc > 0
|| ref.vval.v_partial->pt_dict != NULL)
{
if (verbose)
emsg(_(e_cannot_use_partial_here));
name = NULL;
}
else
{
name = vim_strsave(partial_name(ref.vval.v_partial));
*tofree = name;
}
}
else
{
if (verbose)
semsg(_(e_not_callable_type_str), name);
name = NULL;
}
clear_tv(&ref);
return name;
}
/*
* Call some Vim script function and return the result in "*rettv".
* Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc]
* should have type VAR_UNKNOWN.
* Returns OK or FAIL.
*/
int
call_vim_function(
char_u *func,
int argc,
typval_T *argv,
typval_T *rettv)
{
int ret;
funcexe_T funcexe;
char_u *arg;
char_u *name;
char_u *tofree = NULL;
int ignore_errors;
rettv->v_type = VAR_UNKNOWN; // clear_tv() uses this
CLEAR_FIELD(funcexe);
funcexe.fe_firstline = curwin->w_cursor.lnum;
funcexe.fe_lastline = curwin->w_cursor.lnum;
funcexe.fe_evaluate = TRUE;
// The name might be "import.Func" or "Funcref". We don't know, we need to
// ignore errors for an undefined name. But we do want errors when an
// autoload script has errors. Guess that when there is a dot in the name
// showing errors is the right choice.
ignore_errors = vim_strchr(func, '.') == NULL;
arg = func;
if (ignore_errors)
++emsg_off;
name = deref_function_name(&arg, &tofree, &EVALARG_EVALUATE, FALSE);
if (ignore_errors)
--emsg_off;
if (name == NULL)
name = func;
ret = call_func(name, -1, rettv, argc, argv, &funcexe);
if (ret == FAIL)
clear_tv(rettv);
vim_free(tofree);
return ret;
}
/*
* Call Vim script function "func" and return the result as a string.
* Uses "argv[0]" to "argv[argc - 1]" for the function arguments. "argv[argc]"
* should have type VAR_UNKNOWN.
* Returns NULL when calling the function fails.
*/
void *
call_func_retstr(
char_u *func,
int argc,
typval_T *argv)
{
typval_T rettv;
char_u *retval;
if (call_vim_function(func, argc, argv, &rettv) == FAIL)
return NULL;
retval = vim_strsave(tv_get_string(&rettv));
clear_tv(&rettv);
return retval;
}
/*
* Call Vim script function "func" and return the result as a List.
* Uses "argv" and "argc" as call_func_retstr().
* Returns NULL when there is something wrong.
*/
void *
call_func_retlist(
char_u *func,
int argc,
typval_T *argv)
{
typval_T rettv;
if (call_vim_function(func, argc, argv, &rettv) == FAIL)
return NULL;
if (rettv.v_type != VAR_LIST)
{
clear_tv(&rettv);
return NULL;
}
return rettv.vval.v_list;
}
#if defined(FEAT_FOLDING) || defined(PROTO)
/*
* Evaluate "arg", which is 'foldexpr'.
* Note: caller must set "curwin" to match "arg".
* Returns the foldlevel, and any character preceding it in "*cp". Doesn't
* give error messages.
*/
int
eval_foldexpr(win_T *wp, int *cp)
{
char_u *arg;
typval_T tv;
varnumber_T retval;
char_u *s;
sctx_T saved_sctx = current_sctx;
int use_sandbox = was_set_insecurely((char_u *)"foldexpr",
OPT_LOCAL);
arg = wp->w_p_fde;
current_sctx = wp->w_p_script_ctx[WV_FDE];
++emsg_off;
if (use_sandbox)
++sandbox;
++textwinlock;
*cp = NUL;
if (eval0(arg, &tv, NULL, &EVALARG_EVALUATE) == FAIL)
retval = 0;
else
{
// If the result is a number, just return the number.
if (tv.v_type == VAR_NUMBER)
retval = tv.vval.v_number;
else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
retval = 0;
else
{
// If the result is a string, check if there is a non-digit before
// the number.
s = tv.vval.v_string;
if (!VIM_ISDIGIT(*s) && *s != '-')
*cp = *s++;
retval = atol((char *)s);
}
clear_tv(&tv);
}
--emsg_off;
if (use_sandbox)
--sandbox;
--textwinlock;
clear_evalarg(&EVALARG_EVALUATE, NULL);
current_sctx = saved_sctx;
return (int)retval;
}
#endif
/*
* Get an lval: variable, Dict item or List item that can be assigned a value
* to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
* "name.key", "name.key[expr]" etc.
* Indexing only works if "name" is an existing List or Dictionary.
* "name" points to the start of the name.
* If "rettv" is not NULL it points to the value to be assigned.
* "unlet" is TRUE for ":unlet": slightly different behavior when something is
* wrong; must end in space or cmd separator.
*
* flags:
* GLV_QUIET: do not give error messages
* GLV_READ_ONLY: will not change the variable
* GLV_NO_AUTOLOAD: do not use script autoloading
*
* Returns a pointer to just after the name, including indexes.
* When an evaluation error occurs "lp->ll_name" is NULL;
* Returns NULL for a parsing error. Still need to free items in "lp"!
*/
char_u *
get_lval(
char_u *name,
typval_T *rettv,
lval_T *lp,
int unlet,
int skip,
int flags, // GLV_ values
int fne_flags) // flags for find_name_end()
{
char_u *p;
char_u *expr_start, *expr_end;
int cc;
dictitem_T *v;
typval_T var1;
typval_T var2;
int empty1 = FALSE;
char_u *key = NULL;
int len;
hashtab_T *ht = NULL;
int quiet = flags & GLV_QUIET;
int writing;
int vim9script = in_vim9script();
// Clear everything in "lp".
CLEAR_POINTER(lp);
if (skip || (flags & GLV_COMPILING))
{
// When skipping or compiling just find the end of the name.
lp->ll_name = name;
lp->ll_name_end = find_name_end(name, NULL, NULL,
FNE_INCL_BR | fne_flags);
return lp->ll_name_end;
}
// Cannot use "s:var" at the Vim9 script level. "s: type" is OK.
if (vim9script && at_script_level()
&& name[0] == 's' && name[1] == ':' && !VIM_ISWHITE(name[2]))
{
semsg(_(e_cannot_use_s_colon_in_vim9_script_str), name);
return NULL;
}
// Find the end of the name.
p = find_name_end(name, &expr_start, &expr_end, fne_flags);
lp->ll_name_end = p;
if (expr_start != NULL)
{
// Don't expand the name when we already know there is an error.
if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p)
&& *p != '[' && *p != '.')
{
semsg(_(e_trailing_characters_str), p);
return NULL;
}
lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
if (lp->ll_exp_name == NULL)
{
// Report an invalid expression in braces, unless the
// expression evaluation has been cancelled due to an
// aborting error, an interrupt, or an exception.
if (!aborting() && !quiet)
{
emsg_severe = TRUE;
semsg(_(e_invalid_argument_str), name);
return NULL;
}
}
lp->ll_name = lp->ll_exp_name;
}
else
{
lp->ll_name = name;
if (vim9script)
{
// "a: type" is declaring variable "a" with a type, not "a:".
// However, "g:[key]" is indexing a dictionary.
if (p == name + 2 && p[-1] == ':' && *p != '[')
{
--p;
lp->ll_name_end = p;
}
if (*p == ':')
{
char_u *tp = skipwhite(p + 1);
if (tp == p + 1 && !quiet)
{
semsg(_(e_white_space_required_after_str_str), ":", p);
return NULL;
}
if (!SCRIPT_ID_VALID(current_sctx.sc_sid))
{
semsg(_(e_using_type_not_in_script_context_str), p);
return NULL;
}
// parse the type after the name
lp->ll_type = parse_type(&tp,
&SCRIPT_ITEM(current_sctx.sc_sid)->sn_type_list,
!quiet);
if (lp->ll_type == NULL && !quiet)
return NULL;
lp->ll_name_end = tp;
}
}
}
if (lp->ll_name == NULL)
return p;
if (*p == '.')
{
imported_T *import = find_imported(lp->ll_name, p - lp->ll_name, TRUE);
if (import != NULL)
{
ufunc_T *ufunc;
type_T *type;
lp->ll_sid = import->imp_sid;
lp->ll_name = skipwhite(p + 1);
p = find_name_end(lp->ll_name, NULL, NULL, fne_flags);
lp->ll_name_end = p;
// check the item is exported
cc = *p;
*p = NUL;
if (find_exported(import->imp_sid, lp->ll_name, &ufunc, &type,
NULL, NULL, TRUE) == -1)
{
*p = cc;
return NULL;
}
*p = cc;
}
}
// Without [idx] or .key we are done.
if ((*p != '[' && *p != '.'))
return p;
if (vim9script && lval_root != NULL)
{
// using local variable
lp->ll_tv = lval_root;
v = NULL;
}
else
{
cc = *p;
*p = NUL;
// When we would write to the variable pass &ht and prevent autoload.
writing = !(flags & GLV_READ_ONLY);
v = find_var(lp->ll_name, writing ? &ht : NULL,
(flags & GLV_NO_AUTOLOAD) || writing);
if (v == NULL && !quiet)
semsg(_(e_undefined_variable_str), lp->ll_name);
*p = cc;
if (v == NULL)
return NULL;
lp->ll_tv = &v->di_tv;
}
if (vim9script && (flags & GLV_NO_DECL) == 0)
{
if (!quiet)
semsg(_(e_variable_already_declared), lp->ll_name);
return NULL;
}
/*
* Loop until no more [idx] or .key is following.
*/
var1.v_type = VAR_UNKNOWN;
var2.v_type = VAR_UNKNOWN;
while (*p == '[' || (*p == '.' && p[1] != '=' && p[1] != '.'))
{
if (*p == '.' && lp->ll_tv->v_type != VAR_DICT)
{
if (!quiet)
semsg(_(e_dot_can_only_be_used_on_dictionary_str), name);
return NULL;
}
if (lp->ll_tv->v_type != VAR_LIST
&& lp->ll_tv->v_type != VAR_DICT
&& lp->ll_tv->v_type != VAR_BLOB)
{
if (!quiet)
emsg(_(e_can_only_index_list_dictionary_or_blob));
return NULL;
}
// a NULL list/blob works like an empty list/blob, allocate one now.
if (lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list == NULL)
rettv_list_alloc(lp->ll_tv);
else if (lp->ll_tv->v_type == VAR_BLOB
&& lp->ll_tv->vval.v_blob == NULL)
rettv_blob_alloc(lp->ll_tv);
if (lp->ll_range)
{
if (!quiet)
emsg(_(e_slice_must_come_last));
return NULL;
}
if (vim9script && lp->ll_valtype == NULL
&& v != NULL
&& lp->ll_tv == &v->di_tv
&& ht != NULL && ht == get_script_local_ht())
{
svar_T *sv = find_typval_in_script(lp->ll_tv, 0);
// Vim9 script local variable: get the type
if (sv != NULL)
lp->ll_valtype = sv->sv_type;
}
len = -1;
if (*p == '.')
{
key = p + 1;
for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
;
if (len == 0)
{
if (!quiet)
emsg(_(e_cannot_use_empty_key_for_dictionary));
return NULL;
}
p = key + len;
}
else
{
// Get the index [expr] or the first index [expr: ].
p = skipwhite(p + 1);
if (*p == ':')
empty1 = TRUE;
else
{
empty1 = FALSE;
if (eval1(&p, &var1, &EVALARG_EVALUATE) == FAIL) // recursive!
return NULL;
if (tv_get_string_chk(&var1) == NULL)
{
// not a number or string
clear_tv(&var1);
return NULL;
}
p = skipwhite(p);
}
// Optionally get the second index [ :expr].
if (*p == ':')
{
if (lp->ll_tv->v_type == VAR_DICT)
{
if (!quiet)
emsg(_(e_cannot_slice_dictionary));
clear_tv(&var1);
return NULL;
}
if (rettv != NULL
&& !(rettv->v_type == VAR_LIST
&& rettv->vval.v_list != NULL)
&& !(rettv->v_type == VAR_BLOB
&& rettv->vval.v_blob != NULL))
{
if (!quiet)
emsg(_(e_slice_requires_list_or_blob_value));
clear_tv(&var1);
return NULL;
}
p = skipwhite(p + 1);
if (*p == ']')
lp->ll_empty2 = TRUE;
else
{
lp->ll_empty2 = FALSE;
// recursive!
if (eval1(&p, &var2, &EVALARG_EVALUATE) == FAIL)
{
clear_tv(&var1);
return NULL;
}
if (tv_get_string_chk(&var2) == NULL)
{
// not a number or string
clear_tv(&var1);
clear_tv(&var2);
return NULL;
}
}
lp->ll_range = TRUE;
}
else
lp->ll_range = FALSE;
if (*p != ']')
{
if (!quiet)
emsg(_(e_missing_closing_square_brace));
clear_tv(&var1);
clear_tv(&var2);
return NULL;
}
// Skip to past ']'.
++p;
}
if (lp->ll_tv->v_type == VAR_DICT)
{
if (len == -1)
{
// "[key]": get key from "var1"
key = tv_get_string_chk(&var1); // is number or string
if (key == NULL)
{
clear_tv(&var1);
return NULL;
}
}
lp->ll_list = NULL;
// a NULL dict is equivalent with an empty dict
if (lp->ll_tv->vval.v_dict == NULL)
{
lp->ll_tv->vval.v_dict = dict_alloc();
if (lp->ll_tv->vval.v_dict == NULL)
{
clear_tv(&var1);
return NULL;
}
++lp->ll_tv->vval.v_dict->dv_refcount;
}
lp->ll_dict = lp->ll_tv->vval.v_dict;
lp->ll_di = dict_find(lp->ll_dict, key, len);
// When assigning to a scope dictionary check that a function and
// variable name is valid (only variable name unless it is l: or
// g: dictionary). Disallow overwriting a builtin function.
if (rettv != NULL && lp->ll_dict->dv_scope != 0)
{
int prevval;
int wrong;
if (len != -1)
{
prevval = key[len];
key[len] = NUL;
}
else
prevval = 0; // avoid compiler warning
wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
&& rettv->v_type == VAR_FUNC
&& var_wrong_func_name(key, lp->ll_di == NULL))
|| !valid_varname(key, -1, TRUE);
if (len != -1)
key[len] = prevval;
if (wrong)
{
clear_tv(&var1);
return NULL;
}
}
if (lp->ll_valtype != NULL)
// use the type of the member
lp->ll_valtype = lp->ll_valtype->tt_member;
if (lp->ll_di == NULL)
{
// Can't add "v:" or "a:" variable.
if (lp->ll_dict == get_vimvar_dict()
|| &lp->ll_dict->dv_hashtab == get_funccal_args_ht())
{
semsg(_(e_illegal_variable_name_str), name);
clear_tv(&var1);
return NULL;
}
// Key does not exist in dict: may need to add it.
if (*p == '[' || *p == '.' || unlet)
{
if (!quiet)
semsg(_(e_key_not_present_in_dictionary), key);
clear_tv(&var1);
return NULL;
}
if (len == -1)
lp->ll_newkey = vim_strsave(key);
else
lp->ll_newkey = vim_strnsave(key, len);
clear_tv(&var1);
if (lp->ll_newkey == NULL)
p = NULL;
break;
}
// existing variable, need to check if it can be changed
else if ((flags & GLV_READ_ONLY) == 0
&& (var_check_ro(lp->ll_di->di_flags, name, FALSE)
|| var_check_lock(lp->ll_di->di_flags, name, FALSE)))
{
clear_tv(&var1);
return NULL;
}
clear_tv(&var1);
lp->ll_tv = &lp->ll_di->di_tv;
}
else if (lp->ll_tv->v_type == VAR_BLOB)
{
long bloblen = blob_len(lp->ll_tv->vval.v_blob);
/*
* Get the number and item for the only or first index of the List.
*/
if (empty1)
lp->ll_n1 = 0;
else
// is number or string
lp->ll_n1 = (long)tv_get_number(&var1);
clear_tv(&var1);
if (check_blob_index(bloblen, lp->ll_n1, quiet) == FAIL)
{
clear_tv(&var2);
return NULL;
}
if (lp->ll_range && !lp->ll_empty2)
{
lp->ll_n2 = (long)tv_get_number(&var2);
clear_tv(&var2);
if (check_blob_range(bloblen, lp->ll_n1, lp->ll_n2, quiet)
== FAIL)
return NULL;
}
lp->ll_blob = lp->ll_tv->vval.v_blob;
lp->ll_tv = NULL;
break;
}
else
{
/*
* Get the number and item for the only or first index of the List.
*/
if (empty1)
lp->ll_n1 = 0;
else
// is number or string
lp->ll_n1 = (long)tv_get_number(&var1);
clear_tv(&var1);
lp->ll_dict = NULL;
lp->ll_list = lp->ll_tv->vval.v_list;
lp->ll_li = check_range_index_one(lp->ll_list, &lp->ll_n1, quiet);
if (lp->ll_li == NULL)
{
clear_tv(&var2);
return NULL;
}
if (lp->ll_valtype != NULL)
// use the type of the member
lp->ll_valtype = lp->ll_valtype->tt_member;
/*
* May need to find the item or absolute index for the second
* index of a range.
* When no index given: "lp->ll_empty2" is TRUE.
* Otherwise "lp->ll_n2" is set to the second index.
*/
if (lp->ll_range && !lp->ll_empty2)
{
lp->ll_n2 = (long)tv_get_number(&var2);
// is number or string
clear_tv(&var2);
if (check_range_index_two(lp->ll_list,
&lp->ll_n1, lp->ll_li,
&lp->ll_n2, quiet) == FAIL)
return NULL;
}
lp->ll_tv = &lp->ll_li->li_tv;
}
}
clear_tv(&var1);
lp->ll_name_end = p;
return p;
}
/*
* Clear lval "lp" that was filled by get_lval().
*/
void
clear_lval(lval_T *lp)
{
vim_free(lp->ll_exp_name);
vim_free(lp->ll_newkey);
}
/*
* Set a variable that was parsed by get_lval() to "rettv".
* "endp" points to just after the parsed name.
* "op" is NULL, "+" for "+=", "-" for "-=", "*" for "*=", "/" for "/=",
* "%" for "%=", "." for ".=" or "=" for "=".
*/
void
set_var_lval(
lval_T *lp,
char_u *endp,
typval_T *rettv,
int copy,
int flags, // ASSIGN_CONST, ASSIGN_NO_DECL
char_u *op,
int var_idx) // index for "let [a, b] = list"
{
int cc;
dictitem_T *di;
if (lp->ll_tv == NULL)
{
cc = *endp;
*endp = NUL;
if (in_vim9script() && check_reserved_name(lp->ll_name) == FAIL)
return;
if (lp->ll_blob != NULL)
{
int error = FALSE, val;
if (op != NULL && *op != '=')
{
semsg(_(e_wrong_variable_type_for_str_equal), op);
return;
}
if (value_check_lock(lp->ll_blob->bv_lock, lp->ll_name, FALSE))
return;
if (lp->ll_range && rettv->v_type == VAR_BLOB)
{
if (lp->ll_empty2)
lp->ll_n2 = blob_len(lp->ll_blob) - 1;
if (blob_set_range(lp->ll_blob, lp->ll_n1, lp->ll_n2,
rettv) == FAIL)
return;
}
else
{
val = (int)tv_get_number_chk(rettv, &error);
if (!error)
blob_set_append(lp->ll_blob, lp->ll_n1, val);
}
}
else if (op != NULL && *op != '=')
{
typval_T tv;
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_(e_cannot_modify_existing_variable));
*endp = cc;
return;
}
// handle +=, -=, *=, /=, %= and .=
di = NULL;
if (eval_variable(lp->ll_name, (int)STRLEN(lp->ll_name),
lp->ll_sid, &tv, &di, EVAL_VAR_VERBOSE) == OK)
{
if ((di == NULL
|| (!var_check_ro(di->di_flags, lp->ll_name, FALSE)
&& !tv_check_lock(&di->di_tv, lp->ll_name, FALSE)))
&& tv_op(&tv, rettv, op) == OK)
set_var_const(lp->ll_name, lp->ll_sid, NULL, &tv, FALSE,
ASSIGN_NO_DECL, 0);
clear_tv(&tv);
}
}
else
{
if (lp->ll_type != NULL && check_typval_arg_type(lp->ll_type, rettv,
NULL, 0) == FAIL)
return;
set_var_const(lp->ll_name, lp->ll_sid, lp->ll_type, rettv, copy,
flags, var_idx);
}
*endp = cc;
}
else if (value_check_lock(lp->ll_newkey == NULL
? lp->ll_tv->v_lock
: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE))
;
else if (lp->ll_range)
{
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_(e_cannot_lock_range));
return;
}
(void)list_assign_range(lp->ll_list, rettv->vval.v_list,
lp->ll_n1, lp->ll_n2, lp->ll_empty2, op, lp->ll_name);
}
else
{
/*
* Assign to a List or Dictionary item.
*/
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_(e_cannot_lock_list_or_dict));
return;
}
if (lp->ll_valtype != NULL
&& check_typval_arg_type(lp->ll_valtype, rettv,
NULL, 0) == FAIL)
return;
if (lp->ll_newkey != NULL)
{
if (op != NULL && *op != '=')
{
semsg(_(e_key_not_present_in_dictionary), lp->ll_newkey);
return;
}
if (dict_wrong_func_name(lp->ll_tv->vval.v_dict, rettv,
lp->ll_newkey))
return;
// Need to add an item to the Dictionary.
di = dictitem_alloc(lp->ll_newkey);
if (di == NULL)
return;
if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
{
vim_free(di);
return;
}
lp->ll_tv = &di->di_tv;
}
else if (op != NULL && *op != '=')
{
tv_op(lp->ll_tv, rettv, op);
return;
}
else
clear_tv(lp->ll_tv);
/*
* Assign the value to the variable or list item.
*/
if (copy)
copy_tv(rettv, lp->ll_tv);
else
{
*lp->ll_tv = *rettv;
lp->ll_tv->v_lock = 0;
init_tv(rettv);
}
}
}
/*
* Handle "tv1 += tv2", "tv1 -= tv2", "tv1 *= tv2", "tv1 /= tv2", "tv1 %= tv2"
* and "tv1 .= tv2"
* Returns OK or FAIL.
*/
int
tv_op(typval_T *tv1, typval_T *tv2, char_u *op)
{
varnumber_T n;
char_u numbuf[NUMBUFLEN];
char_u *s;
int failed = FALSE;
// Can't do anything with a Funcref or Dict on the right.
// v:true and friends only work with "..=".
if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT
&& ((tv2->v_type != VAR_BOOL && tv2->v_type != VAR_SPECIAL)
|| *op == '.'))
{
switch (tv1->v_type)
{
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
case VAR_DICT:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_BOOL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
case VAR_INSTR:
break;
case VAR_BLOB:
if (*op != '+' || tv2->v_type != VAR_BLOB)
break;
// BLOB += BLOB
if (tv1->vval.v_blob != NULL && tv2->vval.v_blob != NULL)
{
blob_T *b1 = tv1->vval.v_blob;
blob_T *b2 = tv2->vval.v_blob;
int i, len = blob_len(b2);
for (i = 0; i < len; i++)
ga_append(&b1->bv_ga, blob_get(b2, i));
}
return OK;
case VAR_LIST:
if (*op != '+' || tv2->v_type != VAR_LIST)
break;
// List += List
if (tv2->vval.v_list != NULL)
{
if (tv1->vval.v_list == NULL)
{
tv1->vval.v_list = tv2->vval.v_list;
++tv1->vval.v_list->lv_refcount;
}
else
list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
}
return OK;
case VAR_NUMBER:
case VAR_STRING:
if (tv2->v_type == VAR_LIST)
break;
if (vim_strchr((char_u *)"+-*/%", *op) != NULL)
{
// nr += nr , nr -= nr , nr *=nr , nr /= nr , nr %= nr
n = tv_get_number(tv1);
#ifdef FEAT_FLOAT
if (tv2->v_type == VAR_FLOAT)
{
float_T f = n;
if (*op == '%')
break;
switch (*op)
{
case '+': f += tv2->vval.v_float; break;
case '-': f -= tv2->vval.v_float; break;
case '*': f *= tv2->vval.v_float; break;
case '/': f /= tv2->vval.v_float; break;
}
clear_tv(tv1);
tv1->v_type = VAR_FLOAT;
tv1->vval.v_float = f;
}
else
#endif
{
switch (*op)
{
case '+': n += tv_get_number(tv2); break;
case '-': n -= tv_get_number(tv2); break;
case '*': n *= tv_get_number(tv2); break;
case '/': n = num_divide(n, tv_get_number(tv2),
&failed); break;
case '%': n = num_modulus(n, tv_get_number(tv2),
&failed); break;
}
clear_tv(tv1);
tv1->v_type = VAR_NUMBER;
tv1->vval.v_number = n;
}
}
else
{
if (tv2->v_type == VAR_FLOAT)
break;
// str .= str
s = tv_get_string(tv1);
s = concat_str(s, tv_get_string_buf(tv2, numbuf));
clear_tv(tv1);
tv1->v_type = VAR_STRING;
tv1->vval.v_string = s;
}
return failed ? FAIL : OK;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
{
float_T f;
if (*op == '%' || *op == '.'
|| (tv2->v_type != VAR_FLOAT
&& tv2->v_type != VAR_NUMBER
&& tv2->v_type != VAR_STRING))
break;
if (tv2->v_type == VAR_FLOAT)
f = tv2->vval.v_float;
else
f = tv_get_number(tv2);
switch (*op)
{
case '+': tv1->vval.v_float += f; break;
case '-': tv1->vval.v_float -= f; break;
case '*': tv1->vval.v_float *= f; break;
case '/': tv1->vval.v_float /= f; break;
}
}
#endif
return OK;
}
}
semsg(_(e_wrong_variable_type_for_str_equal), op);
return FAIL;
}
/*
* Evaluate the expression used in a ":for var in expr" command.
* "arg" points to "var".
* Set "*errp" to TRUE for an error, FALSE otherwise;
* Return a pointer that holds the info. Null when there is an error.
*/
void *
eval_for_line(
char_u *arg,
int *errp,
exarg_T *eap,
evalarg_T *evalarg)
{
forinfo_T *fi;
char_u *var_list_end;
char_u *expr;
typval_T tv;
list_T *l;
int skip = !(evalarg->eval_flags & EVAL_EVALUATE);
*errp = TRUE; // default: there is an error
fi = ALLOC_CLEAR_ONE(forinfo_T);
if (fi == NULL)
return NULL;
var_list_end = skip_var_list(arg, TRUE, &fi->fi_varcount,
&fi->fi_semicolon, FALSE);
if (var_list_end == NULL)
return fi;
expr = skipwhite_and_linebreak(var_list_end, evalarg);
if (expr[0] != 'i' || expr[1] != 'n'
|| !(expr[2] == NUL || VIM_ISWHITE(expr[2])))
{
if (in_vim9script() && *expr == ':' && expr != var_list_end)
semsg(_(e_no_white_space_allowed_before_colon_str), expr);
else
emsg(_(e_missing_in_after_for));
return fi;
}
if (skip)
++emsg_skip;
expr = skipwhite_and_linebreak(expr + 2, evalarg);
if (eval0(expr, &tv, eap, evalarg) == OK)
{
*errp = FALSE;
if (!skip)
{
if (tv.v_type == VAR_LIST)
{
l = tv.vval.v_list;
if (l == NULL)
{
// a null list is like an empty list: do nothing
clear_tv(&tv);
}
else
{
// Need a real list here.
CHECK_LIST_MATERIALIZE(l);
// No need to increment the refcount, it's already set for
// the list being used in "tv".
fi->fi_list = l;
list_add_watch(l, &fi->fi_lw);
fi->fi_lw.lw_item = l->lv_first;
}
}
else if (tv.v_type == VAR_BLOB)
{
fi->fi_bi = 0;
if (tv.vval.v_blob != NULL)
{
typval_T btv;
// Make a copy, so that the iteration still works when the
// blob is changed.
blob_copy(tv.vval.v_blob, &btv);
fi->fi_blob = btv.vval.v_blob;
}
clear_tv(&tv);
}
else if (tv.v_type == VAR_STRING)
{
fi->fi_byte_idx = 0;
fi->fi_string = tv.vval.v_string;
tv.vval.v_string = NULL;
if (fi->fi_string == NULL)
fi->fi_string = vim_strsave((char_u *)"");
}
else
{
emsg(_(e_string_list_or_blob_required));
clear_tv(&tv);
}
}
}
if (skip)
--emsg_skip;
fi->fi_break_count = evalarg->eval_break_count;
return fi;
}
/*
* Used when looping over a :for line, skip the "in expr" part.
*/
void
skip_for_lines(void *fi_void, evalarg_T *evalarg)
{
forinfo_T *fi = (forinfo_T *)fi_void;
int i;
for (i = 0; i < fi->fi_break_count; ++i)
eval_next_line(evalarg);
}
/*
* Use the first item in a ":for" list. Advance to the next.
* Assign the values to the variable (list). "arg" points to the first one.
* Return TRUE when a valid item was found, FALSE when at end of list or
* something wrong.
*/
int
next_for_item(void *fi_void, char_u *arg)
{
forinfo_T *fi = (forinfo_T *)fi_void;
int result;
int flag = ASSIGN_FOR_LOOP | (in_vim9script()
? (ASSIGN_FINAL
// first round: error if variable exists
| (fi->fi_bi == 0 ? 0 : ASSIGN_DECL)
| ASSIGN_NO_MEMBER_TYPE)
: 0);
listitem_T *item;
int skip_assign = in_vim9script() && arg[0] == '_'
&& !eval_isnamec(arg[1]);
if (fi->fi_blob != NULL)
{
typval_T tv;
if (fi->fi_bi >= blob_len(fi->fi_blob))
return FALSE;
tv.v_type = VAR_NUMBER;
tv.v_lock = VAR_FIXED;
tv.vval.v_number = blob_get(fi->fi_blob, fi->fi_bi);
++fi->fi_bi;
if (skip_assign)
return TRUE;
return ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon,
fi->fi_varcount, flag, NULL) == OK;
}
if (fi->fi_string != NULL)
{
typval_T tv;
int len;
len = mb_ptr2len(fi->fi_string + fi->fi_byte_idx);
if (len == 0)
return FALSE;
tv.v_type = VAR_STRING;
tv.v_lock = VAR_FIXED;
tv.vval.v_string = vim_strnsave(fi->fi_string + fi->fi_byte_idx, len);
fi->fi_byte_idx += len;
++fi->fi_bi;
if (skip_assign)
result = TRUE;
else
result = ex_let_vars(arg, &tv, TRUE, fi->fi_semicolon,
fi->fi_varcount, flag, NULL) == OK;
vim_free(tv.vval.v_string);
return result;
}
item = fi->fi_lw.lw_item;
if (item == NULL)
result = FALSE;
else
{
fi->fi_lw.lw_item = item->li_next;
++fi->fi_bi;
if (skip_assign)
result = TRUE;
else
result = (ex_let_vars(arg, &item->li_tv, TRUE, fi->fi_semicolon,
fi->fi_varcount, flag, NULL) == OK);
}
return result;
}
/*
* Free the structure used to store info used by ":for".
*/
void
free_for_info(void *fi_void)
{
forinfo_T *fi = (forinfo_T *)fi_void;
if (fi == NULL)
return;
if (fi->fi_list != NULL)
{
list_rem_watch(fi->fi_list, &fi->fi_lw);
list_unref(fi->fi_list);
}
else if (fi->fi_blob != NULL)
blob_unref(fi->fi_blob);
else
vim_free(fi->fi_string);
vim_free(fi);
}
void
set_context_for_expression(
expand_T *xp,
char_u *arg,
cmdidx_T cmdidx)
{
int has_expr = cmdidx != CMD_let && cmdidx != CMD_var;
int c;
char_u *p;
if (cmdidx == CMD_let || cmdidx == CMD_var
|| cmdidx == CMD_const || cmdidx == CMD_final)
{
xp->xp_context = EXPAND_USER_VARS;
if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
{
// ":let var1 var2 ...": find last space.
for (p = arg + STRLEN(arg); p >= arg; )
{
xp->xp_pattern = p;
MB_PTR_BACK(arg, p);
if (VIM_ISWHITE(*p))
break;
}
return;
}
}
else
xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
: EXPAND_EXPRESSION;
while ((xp->xp_pattern = vim_strpbrk(arg,
(char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
{
c = *xp->xp_pattern;
if (c == '&')
{
c = xp->xp_pattern[1];
if (c == '&')
{
++xp->xp_pattern;
xp->xp_context = has_expr ? EXPAND_EXPRESSION : EXPAND_NOTHING;
}
else if (c != ' ')
{
xp->xp_context = EXPAND_SETTINGS;
if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
xp->xp_pattern += 2;
}
}
else if (c == '$')
{
// environment variable
xp->xp_context = EXPAND_ENV_VARS;
}
else if (c == '=')
{
has_expr = TRUE;
xp->xp_context = EXPAND_EXPRESSION;
}
else if (c == '#'
&& xp->xp_context == EXPAND_EXPRESSION)
{
// Autoload function/variable contains '#'.
break;
}
else if ((c == '<' || c == '#')
&& xp->xp_context == EXPAND_FUNCTIONS
&& vim_strchr(xp->xp_pattern, '(') == NULL)
{
// Function name can start with "<SNR>" and contain '#'.
break;
}
else if (has_expr)
{
if (c == '"') // string
{
while ((c = *++xp->xp_pattern) != NUL && c != '"')
if (c == '\\' && xp->xp_pattern[1] != NUL)
++xp->xp_pattern;
xp->xp_context = EXPAND_NOTHING;
}
else if (c == '\'') // literal string
{
// Trick: '' is like stopping and starting a literal string.
while ((c = *++xp->xp_pattern) != NUL && c != '\'')
/* skip */ ;
xp->xp_context = EXPAND_NOTHING;
}
else if (c == '|')
{
if (xp->xp_pattern[1] == '|')
{
++xp->xp_pattern;
xp->xp_context = EXPAND_EXPRESSION;
}
else
xp->xp_context = EXPAND_COMMANDS;
}
else
xp->xp_context = EXPAND_EXPRESSION;
}
else
// Doesn't look like something valid, expand as an expression
// anyway.
xp->xp_context = EXPAND_EXPRESSION;
arg = xp->xp_pattern;
if (*arg != NUL)
while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
/* skip */ ;
}
// ":exe one two" completes "two"
if ((cmdidx == CMD_execute
|| cmdidx == CMD_echo
|| cmdidx == CMD_echon
|| cmdidx == CMD_echomsg)
&& xp->xp_context == EXPAND_EXPRESSION)
{
for (;;)
{
char_u *n = skiptowhite(arg);
if (n == arg || IS_WHITE_OR_NUL(*skipwhite(n)))
break;
arg = skipwhite(n);
}
}
xp->xp_pattern = arg;
}
/*
* Return TRUE if "pat" matches "text".
* Does not use 'cpo' and always uses 'magic'.
*/
int
pattern_match(char_u *pat, char_u *text, int ic)
{
int matches = FALSE;
char_u *save_cpo;
regmatch_T regmatch;
// avoid 'l' flag in 'cpoptions'
save_cpo = p_cpo;
p_cpo = empty_option;
regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
if (regmatch.regprog != NULL)
{
regmatch.rm_ic = ic;
matches = vim_regexec_nl(&regmatch, text, (colnr_T)0);
vim_regfree(regmatch.regprog);
}
p_cpo = save_cpo;
return matches;
}
/*
* Handle a name followed by "(". Both for just "name(arg)" and for
* "expr->name(arg)".
* Returns OK or FAIL.
*/
static int
eval_func(
char_u **arg, // points to "(", will be advanced
evalarg_T *evalarg,
char_u *name,
int name_len,
typval_T *rettv,
int flags,
typval_T *basetv) // "expr" for "expr->name(arg)"
{
int evaluate = flags & EVAL_EVALUATE;
char_u *s = name;
int len = name_len;
partial_T *partial;
int ret = OK;
type_T *type = NULL;
int found_var = FALSE;
if (!evaluate)
check_vars(s, len);
// If "s" is the name of a variable of type VAR_FUNC
// use its contents.
s = deref_func_name(s, &len, &partial,
in_vim9script() ? &type : NULL, !evaluate, FALSE, &found_var);
// Need to make a copy, in case evaluating the arguments makes
// the name invalid.
s = vim_strsave(s);
if (s == NULL || (evaluate && (*s == NUL || (flags & EVAL_CONSTANT))))
ret = FAIL;
else
{
funcexe_T funcexe;
// Invoke the function.
CLEAR_FIELD(funcexe);
funcexe.fe_firstline = curwin->w_cursor.lnum;
funcexe.fe_lastline = curwin->w_cursor.lnum;
funcexe.fe_evaluate = evaluate;
funcexe.fe_partial = partial;
funcexe.fe_basetv = basetv;
funcexe.fe_check_type = type;
funcexe.fe_found_var = found_var;
ret = get_func_tv(s, len, rettv, arg, evalarg, &funcexe);
}
vim_free(s);
// If evaluate is FALSE rettv->v_type was not set in
// get_func_tv, but it's needed in handle_subscript() to parse
// what follows. So set it here.
if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(')
{
rettv->vval.v_string = NULL;
rettv->v_type = VAR_FUNC;
}
// Stop the expression evaluation when immediately
// aborting on error, or when an interrupt occurred or
// an exception was thrown but not caught.
if (evaluate && aborting())
{
if (ret == OK)
clear_tv(rettv);
ret = FAIL;
}
return ret;
}
/*
* Get the next line source line without advancing. But do skip over comment
* lines.
* Only called for Vim9 script.
*/
static char_u *
getline_peek_skip_comments(evalarg_T *evalarg)
{
for (;;)
{
char_u *next = getline_peek(evalarg->eval_getline,
evalarg->eval_cookie);
char_u *p;
if (next == NULL)
break;
p = skipwhite(next);
if (*p != NUL && !vim9_comment_start(p))
return next;
(void)eval_next_line(evalarg);
}
return NULL;
}
/*
* If inside Vim9 script, "arg" points to the end of a line (ignoring a #
* comment) and there is a next line, return the next line (skipping blanks)
* and set "getnext".
* Otherwise return the next non-white at or after "arg" and set "getnext" to
* FALSE.
* "arg" must point somewhere inside a line, not at the start.
*/
char_u *
eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext)
{
char_u *p = skipwhite(arg);
*getnext = FALSE;
if (in_vim9script()
&& evalarg != NULL
&& (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)
&& (*p == NUL || (vim9_comment_start(p) && VIM_ISWHITE(p[-1]))))
{
char_u *next;
if (evalarg->eval_cookie != NULL)
next = getline_peek_skip_comments(evalarg);
else
next = peek_next_line_from_context(evalarg->eval_cctx);
if (next != NULL)
{
*getnext = TRUE;
return skipwhite(next);
}
}
return p;
}
/*
* To be called after eval_next_non_blank() sets "getnext" to TRUE.
* Only called for Vim9 script.
*/
char_u *
eval_next_line(evalarg_T *evalarg)
{
garray_T *gap = &evalarg->eval_ga;
char_u *line;
if (evalarg->eval_cookie != NULL)
line = evalarg->eval_getline(0, evalarg->eval_cookie, 0,
GETLINE_CONCAT_ALL);
else
line = next_line_from_context(evalarg->eval_cctx, TRUE);
++evalarg->eval_break_count;
if (gap->ga_itemsize > 0 && ga_grow(gap, 1) == OK)
{
char_u *p = skipwhite(line);
// Going to concatenate the lines after parsing. For an empty or
// comment line use an empty string.
if (*p == NUL || vim9_comment_start(p))
{
vim_free(line);
line = vim_strsave((char_u *)"");
}
((char_u **)gap->ga_data)[gap->ga_len] = line;
++gap->ga_len;
}
else if (evalarg->eval_cookie != NULL)
{
vim_free(evalarg->eval_tofree);
evalarg->eval_tofree = line;
}
// Advanced to the next line, "arg" no longer points into the previous
// line.
evalarg->eval_using_cmdline = FALSE;
return skipwhite(line);
}
/*
* Call eval_next_non_blank() and get the next line if needed.
*/
char_u *
skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg)
{
int getnext;
char_u *p = skipwhite_and_nl(arg);
if (evalarg == NULL)
return skipwhite(arg);
eval_next_non_blank(p, evalarg, &getnext);
if (getnext)
return eval_next_line(evalarg);
return p;
}
/*
* Initialize "evalarg" for use.
*/
void
init_evalarg(evalarg_T *evalarg)
{
CLEAR_POINTER(evalarg);
ga_init2(&evalarg->eval_tofree_ga, sizeof(char_u *), 20);
}
/*
* After using "evalarg" filled from "eap": free the memory.
*/
void
clear_evalarg(evalarg_T *evalarg, exarg_T *eap)
{
if (evalarg != NULL)
{
if (evalarg->eval_tofree != NULL)
{
if (eap != NULL)
{
// We may need to keep the original command line, e.g. for
// ":let" it has the variable names. But we may also need the
// new one, "nextcmd" points into it. Keep both.
vim_free(eap->cmdline_tofree);
eap->cmdline_tofree = *eap->cmdlinep;
*eap->cmdlinep = evalarg->eval_tofree;
}
else
vim_free(evalarg->eval_tofree);
evalarg->eval_tofree = NULL;
}
ga_clear_strings(&evalarg->eval_tofree_ga);
VIM_CLEAR(evalarg->eval_tofree_lambda);
}
}
/*
* The "evaluate" argument: When FALSE, the argument is only parsed but not
* executed. The function may return OK, but the rettv will be of type
* VAR_UNKNOWN. The function still returns FAIL for a syntax error.
*/
/*
* Handle zero level expression.
* This calls eval1() and handles error message and nextcmd.
* Put the result in "rettv" when returning OK and "evaluate" is TRUE.
* Note: "rettv.v_lock" is not set.
* "evalarg" can be NULL, EVALARG_EVALUATE or a pointer.
* Return OK or FAIL.
*/
int
eval0(
char_u *arg,
typval_T *rettv,
exarg_T *eap,
evalarg_T *evalarg)
{
return eval0_retarg(arg, rettv, eap, evalarg, NULL);
}
/*
* Like eval0() but when "retarg" is not NULL store the pointer to after the
* expression and don't check what comes after the expression.
*/
int
eval0_retarg(
char_u *arg,
typval_T *rettv,
exarg_T *eap,
evalarg_T *evalarg,
char_u **retarg)
{
int ret;
char_u *p;
char_u *expr_end;
int did_emsg_before = did_emsg;
int called_emsg_before = called_emsg;
int flags = evalarg == NULL ? 0 : evalarg->eval_flags;
int check_for_end = retarg == NULL;
int end_error = FALSE;
p = skipwhite(arg);
ret = eval1(&p, rettv, evalarg);
expr_end = p;
p = skipwhite(p);
// In Vim9 script a command block is not split at NL characters for
// commands using an expression argument. Skip over a '#' comment to check
// for a following NL. Require white space before the '#'.
if (in_vim9script() && p > expr_end && retarg == NULL)
while (*p == '#')
{
char_u *nl = vim_strchr(p, NL);
if (nl == NULL)
break;
p = skipwhite(nl + 1);
if (eap != NULL && *p != NUL)
eap->nextcmd = p;
check_for_end = FALSE;
}
if (ret != FAIL && check_for_end)
end_error = !ends_excmd2(arg, p);
if (ret == FAIL || end_error)
{
if (ret != FAIL)
clear_tv(rettv);
/*
* Report the invalid expression unless the expression evaluation has
* been cancelled due to an aborting error, an interrupt, or an
* exception, or we already gave a more specific error.
* Also check called_emsg for when using assert_fails().
*/
if (!aborting()
&& did_emsg == did_emsg_before
&& called_emsg == called_emsg_before
&& (flags & EVAL_CONSTANT) == 0
&& (!in_vim9script() || !vim9_bad_comment(p)))
{
if (end_error)
semsg(_(e_trailing_characters_str), p);
else
semsg(_(e_invalid_expression_str), arg);
}
// Some of the expression may not have been consumed. Do not check for
// a next command to avoid more errors, unless "|" is following, which
// could only be a command separator.
if (eap != NULL && skipwhite(p)[0] == '|' && skipwhite(p)[1] != '|')
eap->nextcmd = check_nextcmd(p);
return FAIL;
}
if (retarg != NULL)
*retarg = p;
else if (check_for_end && eap != NULL)
set_nextcmd(eap, p);
return ret;
}
/*
* Handle top level expression:
* expr2 ? expr1 : expr1
* expr2 ?? expr1
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Note: "rettv.v_lock" is not set.
*
* Return OK or FAIL.
*/
int
eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
{
char_u *p;
int getnext;
CLEAR_POINTER(rettv);
/*
* Get the first variable.
*/
if (eval2(arg, rettv, evalarg) == FAIL)
return FAIL;
p = eval_next_non_blank(*arg, evalarg, &getnext);
if (*p == '?')
{
int op_falsy = p[1] == '?';
int result;
typval_T var2;
evalarg_T *evalarg_used = evalarg;
evalarg_T local_evalarg;
int orig_flags;
int evaluate;
int vim9script = in_vim9script();
if (evalarg == NULL)
{
init_evalarg(&local_evalarg);
evalarg_used = &local_evalarg;
}
orig_flags = evalarg_used->eval_flags;
evaluate = evalarg_used->eval_flags & EVAL_EVALUATE;
if (getnext)
*arg = eval_next_line(evalarg_used);
else
{
if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
{
error_white_both(p, op_falsy ? 2 : 1);
clear_tv(rettv);
return FAIL;
}
*arg = p;
}
result = FALSE;
if (evaluate)
{
int error = FALSE;
if (op_falsy)
result = tv2bool(rettv);
else if (vim9script)
result = tv_get_bool_chk(rettv, &error);
else if (tv_get_number_chk(rettv, &error) != 0)
result = TRUE;
if (error || !op_falsy || !result)
clear_tv(rettv);
if (error)
return FAIL;
}
/*
* Get the second variable. Recursive!
*/
if (op_falsy)
++*arg;
if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[1]))
{
error_white_both(*arg - (op_falsy ? 1 : 0), op_falsy ? 2 : 1);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + 1, evalarg_used);
evalarg_used->eval_flags = (op_falsy ? !result : result)
? orig_flags : orig_flags & ~EVAL_EVALUATE;
if (eval1(arg, &var2, evalarg_used) == FAIL)
{
evalarg_used->eval_flags = orig_flags;
return FAIL;
}
if (!op_falsy || !result)
*rettv = var2;
if (!op_falsy)
{
/*
* Check for the ":".
*/
p = eval_next_non_blank(*arg, evalarg_used, &getnext);
if (*p != ':')
{
emsg(_(e_missing_colon_after_questionmark));
if (evaluate && result)
clear_tv(rettv);
evalarg_used->eval_flags = orig_flags;
return FAIL;
}
if (getnext)
*arg = eval_next_line(evalarg_used);
else
{
if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
{
error_white_both(p, 1);
clear_tv(rettv);
evalarg_used->eval_flags = orig_flags;
return FAIL;
}
*arg = p;
}
/*
* Get the third variable. Recursive!
*/
if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[1]))
{
error_white_both(*arg, 1);
clear_tv(rettv);
evalarg_used->eval_flags = orig_flags;
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + 1, evalarg_used);
evalarg_used->eval_flags = !result ? orig_flags
: orig_flags & ~EVAL_EVALUATE;
if (eval1(arg, &var2, evalarg_used) == FAIL)
{
if (evaluate && result)
clear_tv(rettv);
evalarg_used->eval_flags = orig_flags;
return FAIL;
}
if (evaluate && !result)
*rettv = var2;
}
if (evalarg == NULL)
clear_evalarg(&local_evalarg, NULL);
else
evalarg->eval_flags = orig_flags;
}
return OK;
}
/*
* Handle first level expression:
* expr2 || expr2 || expr2 logical OR
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval2(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
{
char_u *p;
int getnext;
/*
* Get the first variable.
*/
if (eval3(arg, rettv, evalarg) == FAIL)
return FAIL;
/*
* Handle the "||" operator.
*/
p = eval_next_non_blank(*arg, evalarg, &getnext);
if (p[0] == '|' && p[1] == '|')
{
evalarg_T *evalarg_used = evalarg;
evalarg_T local_evalarg;
int evaluate;
int orig_flags;
long result = FALSE;
typval_T var2;
int error = FALSE;
int vim9script = in_vim9script();
if (evalarg == NULL)
{
init_evalarg(&local_evalarg);
evalarg_used = &local_evalarg;
}
orig_flags = evalarg_used->eval_flags;
evaluate = orig_flags & EVAL_EVALUATE;
if (evaluate)
{
if (vim9script)
result = tv_get_bool_chk(rettv, &error);
else if (tv_get_number_chk(rettv, &error) != 0)
result = TRUE;
clear_tv(rettv);
if (error)
return FAIL;
}
/*
* Repeat until there is no following "||".
*/
while (p[0] == '|' && p[1] == '|')
{
if (getnext)
*arg = eval_next_line(evalarg_used);
else
{
if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
{
error_white_both(p, 2);
clear_tv(rettv);
return FAIL;
}
*arg = p;
}
/*
* Get the second variable.
*/
if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[2]))
{
error_white_both(*arg, 2);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + 2, evalarg_used);
evalarg_used->eval_flags = !result ? orig_flags
: orig_flags & ~EVAL_EVALUATE;
if (eval3(arg, &var2, evalarg_used) == FAIL)
return FAIL;
/*
* Compute the result.
*/
if (evaluate && !result)
{
if (vim9script)
result = tv_get_bool_chk(&var2, &error);
else if (tv_get_number_chk(&var2, &error) != 0)
result = TRUE;
clear_tv(&var2);
if (error)
return FAIL;
}
if (evaluate)
{
if (vim9script)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = result ? VVAL_TRUE : VVAL_FALSE;
}
else
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = result;
}
}
p = eval_next_non_blank(*arg, evalarg_used, &getnext);
}
if (evalarg == NULL)
clear_evalarg(&local_evalarg, NULL);
else
evalarg->eval_flags = orig_flags;
}
return OK;
}
/*
* Handle second level expression:
* expr3 && expr3 && expr3 logical AND
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval3(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
{
char_u *p;
int getnext;
/*
* Get the first variable.
*/
if (eval4(arg, rettv, evalarg) == FAIL)
return FAIL;
/*
* Handle the "&&" operator.
*/
p = eval_next_non_blank(*arg, evalarg, &getnext);
if (p[0] == '&' && p[1] == '&')
{
evalarg_T *evalarg_used = evalarg;
evalarg_T local_evalarg;
int orig_flags;
int evaluate;
long result = TRUE;
typval_T var2;
int error = FALSE;
int vim9script = in_vim9script();
if (evalarg == NULL)
{
init_evalarg(&local_evalarg);
evalarg_used = &local_evalarg;
}
orig_flags = evalarg_used->eval_flags;
evaluate = orig_flags & EVAL_EVALUATE;
if (evaluate)
{
if (vim9script)
result = tv_get_bool_chk(rettv, &error);
else if (tv_get_number_chk(rettv, &error) == 0)
result = FALSE;
clear_tv(rettv);
if (error)
return FAIL;
}
/*
* Repeat until there is no following "&&".
*/
while (p[0] == '&' && p[1] == '&')
{
if (getnext)
*arg = eval_next_line(evalarg_used);
else
{
if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
{
error_white_both(p, 2);
clear_tv(rettv);
return FAIL;
}
*arg = p;
}
/*
* Get the second variable.
*/
if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[2]))
{
error_white_both(*arg, 2);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + 2, evalarg_used);
evalarg_used->eval_flags = result ? orig_flags
: orig_flags & ~EVAL_EVALUATE;
CLEAR_FIELD(var2);
if (eval4(arg, &var2, evalarg_used) == FAIL)
return FAIL;
/*
* Compute the result.
*/
if (evaluate && result)
{
if (vim9script)
result = tv_get_bool_chk(&var2, &error);
else if (tv_get_number_chk(&var2, &error) == 0)
result = FALSE;
clear_tv(&var2);
if (error)
return FAIL;
}
if (evaluate)
{
if (vim9script)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = result ? VVAL_TRUE : VVAL_FALSE;
}
else
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = result;
}
}
p = eval_next_non_blank(*arg, evalarg_used, &getnext);
}
if (evalarg == NULL)
clear_evalarg(&local_evalarg, NULL);
else
evalarg->eval_flags = orig_flags;
}
return OK;
}
/*
* Handle third level expression:
* var1 == var2
* var1 =~ var2
* var1 != var2
* var1 !~ var2
* var1 > var2
* var1 >= var2
* var1 < var2
* var1 <= var2
* var1 is var2
* var1 isnot var2
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
{
char_u *p;
int getnext;
exprtype_T type = EXPR_UNKNOWN;
int len = 2;
int type_is = FALSE;
/*
* Get the first variable.
*/
if (eval5(arg, rettv, evalarg) == FAIL)
return FAIL;
p = eval_next_non_blank(*arg, evalarg, &getnext);
type = get_compare_type(p, &len, &type_is);
/*
* If there is a comparative operator, use it.
*/
if (type != EXPR_UNKNOWN)
{
typval_T var2;
int ic;
int vim9script = in_vim9script();
int evaluate = evalarg == NULL
? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
long comp_lnum = SOURCING_LNUM;
if (getnext)
{
*arg = eval_next_line(evalarg);
p = *arg;
}
else if (evaluate && vim9script && !VIM_ISWHITE(**arg))
{
error_white_both(*arg, len);
clear_tv(rettv);
return FAIL;
}
if (vim9script && type_is && (p[len] == '?' || p[len] == '#'))
{
semsg(_(e_invalid_expression_str), p);
clear_tv(rettv);
return FAIL;
}
// extra question mark appended: ignore case
if (p[len] == '?')
{
ic = TRUE;
++len;
}
// extra '#' appended: match case
else if (p[len] == '#')
{
ic = FALSE;
++len;
}
// nothing appended: use 'ignorecase' if not in Vim script
else
ic = vim9script ? FALSE : p_ic;
/*
* Get the second variable.
*/
if (evaluate && vim9script && !IS_WHITE_OR_NUL(p[len]))
{
error_white_both(p, len);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(p + len, evalarg);
if (eval5(arg, &var2, evalarg) == FAIL)
{
clear_tv(rettv);
return FAIL;
}
if (evaluate)
{
int ret;
// use the line of the comparison for messages
SOURCING_LNUM = comp_lnum;
if (vim9script && check_compare_types(type, rettv, &var2) == FAIL)
{
ret = FAIL;
clear_tv(rettv);
}
else
ret = typval_compare(rettv, &var2, type, ic);
clear_tv(&var2);
return ret;
}
}
return OK;
}
/*
* Make a copy of blob "tv1" and append blob "tv2".
*/
void
eval_addblob(typval_T *tv1, typval_T *tv2)
{
blob_T *b1 = tv1->vval.v_blob;
blob_T *b2 = tv2->vval.v_blob;
blob_T *b = blob_alloc();
int i;
if (b != NULL)
{
for (i = 0; i < blob_len(b1); i++)
ga_append(&b->bv_ga, blob_get(b1, i));
for (i = 0; i < blob_len(b2); i++)
ga_append(&b->bv_ga, blob_get(b2, i));
clear_tv(tv1);
rettv_blob_set(tv1, b);
}
}
/*
* Make a copy of list "tv1" and append list "tv2".
*/
int
eval_addlist(typval_T *tv1, typval_T *tv2)
{
typval_T var3;
// concatenate Lists
if (list_concat(tv1->vval.v_list, tv2->vval.v_list, &var3) == FAIL)
{
clear_tv(tv1);
clear_tv(tv2);
return FAIL;
}
clear_tv(tv1);
*tv1 = var3;
return OK;
}
/*
* Handle fourth level expression:
* + number addition, concatenation of list or blob
* - number subtraction
* . string concatenation (if script version is 1)
* .. string concatenation
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval5(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
{
/*
* Get the first variable.
*/
if (eval6(arg, rettv, evalarg, FALSE) == FAIL)
return FAIL;
/*
* Repeat computing, until no '+', '-' or '.' is following.
*/
for (;;)
{
int evaluate;
int getnext;
char_u *p;
int op;
int oplen;
int concat;
typval_T var2;
int vim9script = in_vim9script();
// "." is only string concatenation when scriptversion is 1
// "+=", "-=" and "..=" are assignments
// "++" and "--" on the next line are a separate command.
p = eval_next_non_blank(*arg, evalarg, &getnext);
op = *p;
concat = op == '.' && (*(p + 1) == '.' || in_old_script(2));
if ((op != '+' && op != '-' && !concat) || p[1] == '='
|| (p[1] == '.' && p[2] == '='))
break;
if (getnext && (op == '+' || op == '-') && p[0] == p[1])
break;
evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
oplen = (concat && p[1] == '.') ? 2 : 1;
if (getnext)
*arg = eval_next_line(evalarg);
else
{
if (evaluate && vim9script && !VIM_ISWHITE(**arg))
{
error_white_both(*arg, oplen);
clear_tv(rettv);
return FAIL;
}
*arg = p;
}
if ((op != '+' || (rettv->v_type != VAR_LIST
&& rettv->v_type != VAR_BLOB))
#ifdef FEAT_FLOAT
&& (op == '.' || rettv->v_type != VAR_FLOAT)
#endif
&& evaluate)
{
int error = FALSE;
// For "list + ...", an illegal use of the first operand as
// a number cannot be determined before evaluating the 2nd
// operand: if this is also a list, all is ok.
// For "something . ...", "something - ..." or "non-list + ...",
// we know that the first operand needs to be a string or number
// without evaluating the 2nd operand. So check before to avoid
// side effects after an error.
if (op != '.')
tv_get_number_chk(rettv, &error);
if ((op == '.' && tv_get_string_chk(rettv) == NULL) || error)
{
clear_tv(rettv);
return FAIL;
}
}
/*
* Get the second variable.
*/
if (evaluate && vim9script && !IS_WHITE_OR_NUL((*arg)[oplen]))
{
error_white_both(*arg, oplen);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + oplen, evalarg);
if (eval6(arg, &var2, evalarg, !vim9script && op == '.') == FAIL)
{
clear_tv(rettv);
return FAIL;
}
if (evaluate)
{
/*
* Compute the result.
*/
if (op == '.')
{
char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
char_u *s1 = tv_get_string_buf(rettv, buf1);
char_u *s2 = NULL;
if (vim9script && (var2.v_type == VAR_VOID
|| var2.v_type == VAR_CHANNEL
|| var2.v_type == VAR_JOB))
semsg(_(e_using_invalid_value_as_string_str),
vartype_name(var2.v_type));
#ifdef FEAT_FLOAT
else if (vim9script && var2.v_type == VAR_FLOAT)
{
vim_snprintf((char *)buf2, NUMBUFLEN, "%g",
var2.vval.v_float);
s2 = buf2;
}
#endif
else
s2 = tv_get_string_buf_chk(&var2, buf2);
if (s2 == NULL) // type error ?
{
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
p = concat_str(s1, s2);
clear_tv(rettv);
rettv->v_type = VAR_STRING;
rettv->vval.v_string = p;
}
else if (op == '+' && rettv->v_type == VAR_BLOB
&& var2.v_type == VAR_BLOB)
eval_addblob(rettv, &var2);
else if (op == '+' && rettv->v_type == VAR_LIST
&& var2.v_type == VAR_LIST)
{
if (eval_addlist(rettv, &var2) == FAIL)
return FAIL;
}
else
{
int error = FALSE;
varnumber_T n1, n2;
#ifdef FEAT_FLOAT
float_T f1 = 0, f2 = 0;
if (rettv->v_type == VAR_FLOAT)
{
f1 = rettv->vval.v_float;
n1 = 0;
}
else
#endif
{
n1 = tv_get_number_chk(rettv, &error);
if (error)
{
// This can only happen for "list + non-list" or
// "blob + non-blob". For "non-list + ..." or
// "something - ...", we returned before evaluating the
// 2nd operand.
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
f1 = n1;
#endif
}
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
{
f2 = var2.vval.v_float;
n2 = 0;
}
else
#endif
{
n2 = tv_get_number_chk(&var2, &error);
if (error)
{
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
f2 = n2;
#endif
}
clear_tv(rettv);
#ifdef FEAT_FLOAT
// If there is a float on either side the result is a float.
if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
{
if (op == '+')
f1 = f1 + f2;
else
f1 = f1 - f2;
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = f1;
}
else
#endif
{
if (op == '+')
n1 = n1 + n2;
else
n1 = n1 - n2;
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n1;
}
}
clear_tv(&var2);
}
}
return OK;
}
/*
* Handle fifth level expression:
* * number multiplication
* / number division
* % number modulo
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval6(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int want_string) // after "." operator
{
#ifdef FEAT_FLOAT
int use_float = FALSE;
#endif
/*
* Get the first variable.
*/
if (eval7t(arg, rettv, evalarg, want_string) == FAIL)
return FAIL;
/*
* Repeat computing, until no '*', '/' or '%' is following.
*/
for (;;)
{
int evaluate;
int getnext;
typval_T var2;
char_u *p;
int op;
varnumber_T n1, n2;
#ifdef FEAT_FLOAT
float_T f1, f2;
#endif
int error;
// "*=", "/=" and "%=" are assignments
p = eval_next_non_blank(*arg, evalarg, &getnext);
op = *p;
if ((op != '*' && op != '/' && op != '%') || p[1] == '=')
break;
evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
if (getnext)
*arg = eval_next_line(evalarg);
else
{
if (evaluate && in_vim9script() && !VIM_ISWHITE(**arg))
{
error_white_both(*arg, 1);
clear_tv(rettv);
return FAIL;
}
*arg = p;
}
#ifdef FEAT_FLOAT
f1 = 0;
f2 = 0;
#endif
error = FALSE;
if (evaluate)
{
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
f1 = rettv->vval.v_float;
use_float = TRUE;
n1 = 0;
}
else
#endif
n1 = tv_get_number_chk(rettv, &error);
clear_tv(rettv);
if (error)
return FAIL;
}
else
n1 = 0;
/*
* Get the second variable.
*/
if (evaluate && in_vim9script() && !IS_WHITE_OR_NUL((*arg)[1]))
{
error_white_both(*arg, 1);
clear_tv(rettv);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg + 1, evalarg);
if (eval7t(arg, &var2, evalarg, FALSE) == FAIL)
return FAIL;
if (evaluate)
{
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
{
if (!use_float)
{
f1 = n1;
use_float = TRUE;
}
f2 = var2.vval.v_float;
n2 = 0;
}
else
#endif
{
n2 = tv_get_number_chk(&var2, &error);
clear_tv(&var2);
if (error)
return FAIL;
#ifdef FEAT_FLOAT
if (use_float)
f2 = n2;
#endif
}
/*
* Compute the result.
* When either side is a float the result is a float.
*/
#ifdef FEAT_FLOAT
if (use_float)
{
if (op == '*')
f1 = f1 * f2;
else if (op == '/')
{
# ifdef VMS
// VMS crashes on divide by zero, work around it
if (f2 == 0.0)
{
if (f1 == 0)
f1 = -1 * __F_FLT_MAX - 1L; // similar to NaN
else if (f1 < 0)
f1 = -1 * __F_FLT_MAX;
else
f1 = __F_FLT_MAX;
}
else
f1 = f1 / f2;
# else
// We rely on the floating point library to handle divide
// by zero to result in "inf" and not a crash.
f1 = f1 / f2;
# endif
}
else
{
emsg(_(e_cannot_use_percent_with_float));
return FAIL;
}
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = f1;
}
else
#endif
{
int failed = FALSE;
if (op == '*')
n1 = n1 * n2;
else if (op == '/')
n1 = num_divide(n1, n2, &failed);
else
n1 = num_modulus(n1, n2, &failed);
if (failed)
return FAIL;
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n1;
}
}
}
return OK;
}
/*
* Handle a type cast before a base level expression.
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
* Return OK or FAIL.
*/
static int
eval7t(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int want_string) // after "." operator
{
type_T *want_type = NULL;
garray_T type_list; // list of pointers to allocated types
int res;
int evaluate = evalarg == NULL ? 0
: (evalarg->eval_flags & EVAL_EVALUATE);
// Recognize <type> in Vim9 script only.
if (in_vim9script() && **arg == '<' && eval_isnamec1((*arg)[1])
&& STRNCMP(*arg, "<SNR>", 5) != 0)
{
++*arg;
ga_init2(&type_list, sizeof(type_T *), 10);
want_type = parse_type(arg, &type_list, TRUE);
if (want_type == NULL && (evaluate || **arg != '>'))
{
clear_type_list(&type_list);
return FAIL;
}
if (**arg != '>')
{
if (*skipwhite(*arg) == '>')
semsg(_(e_no_white_space_allowed_before_str_str), ">", *arg);
else
emsg(_(e_missing_gt));
clear_type_list(&type_list);
return FAIL;
}
++*arg;
*arg = skipwhite_and_linebreak(*arg, evalarg);
}
res = eval7(arg, rettv, evalarg, want_string);
if (want_type != NULL && evaluate)
{
if (res == OK)
{
type_T *actual = typval2type(rettv, get_copyID(), &type_list,
TVTT_DO_MEMBER);
if (!equal_type(want_type, actual, 0))
{
if (want_type == &t_bool && actual != &t_bool
&& (actual->tt_flags & TTFLAG_BOOL_OK))
{
int n = tv2bool(rettv);
// can use "0" and "1" for boolean in some places
clear_tv(rettv);
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = n ? VVAL_TRUE : VVAL_FALSE;
}
else
{
where_T where = WHERE_INIT;
where.wt_variable = TRUE;
res = check_type(want_type, actual, TRUE, where);
}
}
}
clear_type_list(&type_list);
}
return res;
}
int
eval_leader(char_u **arg, int vim9)
{
char_u *s = *arg;
char_u *p = *arg;
while (*p == '!' || *p == '-' || *p == '+')
{
char_u *n = skipwhite(p + 1);
// ++, --, -+ and +- are not accepted in Vim9 script
if (vim9 && (*p == '-' || *p == '+') && (*n == '-' || *n == '+'))
{
semsg(_(e_invalid_expression_str), s);
return FAIL;
}
p = n;
}
*arg = p;
return OK;
}
/*
* Check for a predefined value "true", "false" and "null.*".
* Return OK when recognized.
*/
int
handle_predefined(char_u *s, int len, typval_T *rettv)
{
switch (len)
{
case 4: if (STRNCMP(s, "true", 4) == 0)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_TRUE;
return OK;
}
if (STRNCMP(s, "null", 4) == 0)
{
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NULL;
return OK;
}
break;
case 5: if (STRNCMP(s, "false", 5) == 0)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_FALSE;
return OK;
}
break;
case 8: if (STRNCMP(s, "null_job", 8) == 0)
{
#ifdef FEAT_JOB_CHANNEL
rettv->v_type = VAR_JOB;
rettv->vval.v_job = NULL;
#else
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NULL;
#endif
return OK;
}
break;
case 9:
if (STRNCMP(s, "null_", 5) != 0)
break;
if (STRNCMP(s + 5, "list", 4) == 0)
{
rettv->v_type = VAR_LIST;
rettv->vval.v_list = NULL;
return OK;
}
if (STRNCMP(s + 5, "dict", 4) == 0)
{
rettv->v_type = VAR_DICT;
rettv->vval.v_dict = NULL;
return OK;
}
if (STRNCMP(s + 5, "blob", 4) == 0)
{
rettv->v_type = VAR_BLOB;
rettv->vval.v_blob = NULL;
return OK;
}
break;
case 11: if (STRNCMP(s, "null_string", 11) == 0)
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = NULL;
return OK;
}
break;
case 12:
if (STRNCMP(s, "null_channel", 12) == 0)
{
#ifdef FEAT_JOB_CHANNEL
rettv->v_type = VAR_CHANNEL;
rettv->vval.v_channel = NULL;
#else
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NULL;
#endif
return OK;
}
if (STRNCMP(s, "null_partial", 12) == 0)
{
rettv->v_type = VAR_PARTIAL;
rettv->vval.v_partial = NULL;
return OK;
}
break;
case 13: if (STRNCMP(s, "null_function", 13) == 0)
{
rettv->v_type = VAR_FUNC;
rettv->vval.v_string = NULL;
return OK;
}
break;
}
return FAIL;
}
/*
* Handle sixth level expression:
* number number constant
* 0zFFFFFFFF Blob constant
* "string" string constant
* 'string' literal string constant
* &option-name option value
* @r register contents
* identifier variable value
* function() function call
* $VAR environment variable
* (expression) nested expression
* [expr, expr] List
* {arg, arg -> expr} Lambda
* {key: val, key: val} Dictionary
* #{key: val, key: val} Dictionary with literal keys
*
* Also handle:
* ! in front logical NOT
* - in front unary minus
* + in front unary plus (ignored)
* trailing [] subscript in String or List
* trailing .name entry in Dictionary
* trailing ->name() method call
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to just after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval7(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int want_string) // after "." operator
{
int evaluate = evalarg != NULL
&& (evalarg->eval_flags & EVAL_EVALUATE);
int len;
char_u *s;
char_u *name_start = NULL;
char_u *start_leader, *end_leader;
int ret = OK;
char_u *alias;
static int recurse = 0;
int vim9script = in_vim9script();
/*
* Initialise variable so that clear_tv() can't mistake this for a
* string and free a string that isn't there.
*/
rettv->v_type = VAR_UNKNOWN;
/*
* Skip '!', '-' and '+' characters. They are handled later.
*/
start_leader = *arg;
if (eval_leader(arg, vim9script) == FAIL)
return FAIL;
end_leader = *arg;
if (**arg == '.' && (!isdigit(*(*arg + 1))
#ifdef FEAT_FLOAT
|| in_old_script(2)
#endif
))
{
semsg(_(e_invalid_expression_str), *arg);
++*arg;
return FAIL;
}
// Limit recursion to 1000 levels. At least at 10000 we run out of stack
// and crash. With MSVC the stack is smaller.
if (recurse ==
#ifdef _MSC_VER
300
#else
1000
#endif
)
{
semsg(_(e_expression_too_recursive_str), *arg);
return FAIL;
}
++recurse;
switch (**arg)
{
/*
* Number constant.
*/
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.': ret = eval_number(arg, rettv, evaluate, want_string);
// Apply prefixed "-" and "+" now. Matters especially when
// "->" follows.
if (ret == OK && evaluate && end_leader > start_leader
&& rettv->v_type != VAR_BLOB)
ret = eval7_leader(rettv, TRUE, start_leader, &end_leader);
break;
/*
* String constant: "string".
*/
case '"': ret = eval_string(arg, rettv, evaluate);
break;
/*
* Literal string constant: 'str''ing'.
*/
case '\'': ret = eval_lit_string(arg, rettv, evaluate);
break;
/*
* List: [expr, expr]
*/
case '[': ret = eval_list(arg, rettv, evalarg, TRUE);
break;
/*
* Dictionary: #{key: val, key: val}
*/
case '#': if (vim9script)
{
ret = vim9_bad_comment(*arg) ? FAIL : NOTDONE;
}
else if ((*arg)[1] == '{')
{
++*arg;
ret = eval_dict(arg, rettv, evalarg, TRUE);
}
else
ret = NOTDONE;
break;
/*
* Lambda: {arg, arg -> expr}
* Dictionary: {'key': val, 'key': val}
*/
case '{': if (vim9script)
ret = NOTDONE;
else
ret = get_lambda_tv(arg, rettv, vim9script, evalarg);
if (ret == NOTDONE)
ret = eval_dict(arg, rettv, evalarg, FALSE);
break;
/*
* Option value: &name
*/
case '&': ret = eval_option(arg, rettv, evaluate);
break;
/*
* Environment variable: $VAR.
*/
case '$': ret = eval_env_var(arg, rettv, evaluate);
break;
/*
* Register contents: @r.
*/
case '@': ++*arg;
if (evaluate)
{
if (vim9script && IS_WHITE_OR_NUL(**arg))
semsg(_(e_syntax_error_at_str), *arg);
else if (vim9script && !valid_yank_reg(**arg, FALSE))
emsg_invreg(**arg);
else
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = get_reg_contents(**arg,
GREG_EXPR_SRC);
}
}
if (**arg != NUL)
++*arg;
break;
/*
* nested expression: (expression).
* or lambda: (arg) => expr
*/
case '(': ret = NOTDONE;
if (vim9script)
{
ret = get_lambda_tv(arg, rettv, TRUE, evalarg);
if (ret == OK && evaluate)
{
ufunc_T *ufunc = rettv->vval.v_partial->pt_func;
// Compile it here to get the return type. The return
// type is optional, when it's missing use t_unknown.
// This is recognized in compile_return().
if (ufunc->uf_ret_type->tt_type == VAR_VOID)
ufunc->uf_ret_type = &t_unknown;
if (compile_def_function(ufunc, FALSE,
get_compile_type(ufunc), NULL) == FAIL)
{
clear_tv(rettv);
ret = FAIL;
}
}
}
if (ret == NOTDONE)
{
*arg = skipwhite_and_linebreak(*arg + 1, evalarg);
ret = eval1(arg, rettv, evalarg); // recursive!
*arg = skipwhite_and_linebreak(*arg, evalarg);
if (**arg == ')')
++*arg;
else if (ret == OK)
{
emsg(_(e_missing_closing_paren));
clear_tv(rettv);
ret = FAIL;
}
}
break;
default: ret = NOTDONE;
break;
}
if (ret == NOTDONE)
{
/*
* Must be a variable or function name.
* Can also be a curly-braces kind of name: {expr}.
*/
s = *arg;
len = get_name_len(arg, &alias, evaluate, TRUE);
if (alias != NULL)
s = alias;
if (len <= 0)
ret = FAIL;
else
{
int flags = evalarg == NULL ? 0 : evalarg->eval_flags;
if (evaluate && vim9script && len == 1 && *s == '_')
{
emsg(_(e_cannot_use_underscore_here));
ret = FAIL;
}
else if (evaluate && vim9script && len > 2
&& s[0] == 's' && s[1] == ':')
{
semsg(_(e_cannot_use_s_colon_in_vim9_script_str), s);
ret = FAIL;
}
else if ((vim9script ? **arg : *skipwhite(*arg)) == '(')
{
// "name(..." recursive!
*arg = skipwhite(*arg);
ret = eval_func(arg, evalarg, s, len, rettv, flags, NULL);
}
else if (flags & EVAL_CONSTANT)
ret = FAIL;
else if (evaluate)
{
// get the value of "true", "false", etc. or a variable
ret = FAIL;
if (vim9script)
ret = handle_predefined(s, len, rettv);
if (ret == FAIL)
{
name_start = s;
ret = eval_variable(s, len, 0, rettv, NULL,
EVAL_VAR_VERBOSE + EVAL_VAR_IMPORT);
}
}
else
{
// skip the name
check_vars(s, len);
ret = OK;
}
}
vim_free(alias);
}
// Handle following '[', '(' and '.' for expr[expr], expr.name,
// expr(expr), expr->name(expr)
if (ret == OK)
ret = handle_subscript(arg, name_start, rettv, evalarg, TRUE);
/*
* Apply logical NOT and unary '-', from right to left, ignore '+'.
*/
if (ret == OK && evaluate && end_leader > start_leader)
ret = eval7_leader(rettv, FALSE, start_leader, &end_leader);
--recurse;
return ret;
}
/*
* Apply the leading "!" and "-" before an eval7 expression to "rettv".
* When "numeric_only" is TRUE only handle "+" and "-".
* Adjusts "end_leaderp" until it is at "start_leader".
*/
static int
eval7_leader(
typval_T *rettv,
int numeric_only,
char_u *start_leader,
char_u **end_leaderp)
{
char_u *end_leader = *end_leaderp;
int ret = OK;
int error = FALSE;
varnumber_T val = 0;
vartype_T type = rettv->v_type;
int vim9script = in_vim9script();
#ifdef FEAT_FLOAT
float_T f = 0.0;
if (rettv->v_type == VAR_FLOAT)
f = rettv->vval.v_float;
else
#endif
{
while (VIM_ISWHITE(end_leader[-1]))
--end_leader;
if (vim9script && end_leader[-1] == '!')
val = tv2bool(rettv);
else
val = tv_get_number_chk(rettv, &error);
}
if (error)
{
clear_tv(rettv);
ret = FAIL;
}
else
{
while (end_leader > start_leader)
{
--end_leader;
if (*end_leader == '!')
{
if (numeric_only)
{
++end_leader;
break;
}
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
if (vim9script)
{
rettv->v_type = VAR_BOOL;
val = f == 0.0 ? VVAL_TRUE : VVAL_FALSE;
}
else
f = !f;
}
else
#endif
{
val = !val;
type = VAR_BOOL;
}
}
else if (*end_leader == '-')
{
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
f = -f;
else
#endif
{
val = -val;
type = VAR_NUMBER;
}
}
}
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
clear_tv(rettv);
rettv->vval.v_float = f;
}
else
#endif
{
clear_tv(rettv);
if (vim9script)
rettv->v_type = type;
else
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = val;
}
}
*end_leaderp = end_leader;
return ret;
}
/*
* Call the function referred to in "rettv".
*/
static int
call_func_rettv(
char_u **arg,
evalarg_T *evalarg,
typval_T *rettv,
int evaluate,
dict_T *selfdict,
typval_T *basetv)
{
partial_T *pt = NULL;
funcexe_T funcexe;
typval_T functv;
char_u *s;
int ret;
// need to copy the funcref so that we can clear rettv
if (evaluate)
{
functv = *rettv;
rettv->v_type = VAR_UNKNOWN;
// Invoke the function. Recursive!
if (functv.v_type == VAR_PARTIAL)
{
pt = functv.vval.v_partial;
s = partial_name(pt);
}
else
{
s = functv.vval.v_string;
if (s == NULL || *s == NUL)
{
emsg(_(e_empty_function_name));
ret = FAIL;
goto theend;
}
}
}
else
s = (char_u *)"";
CLEAR_FIELD(funcexe);
funcexe.fe_firstline = curwin->w_cursor.lnum;
funcexe.fe_lastline = curwin->w_cursor.lnum;
funcexe.fe_evaluate = evaluate;
funcexe.fe_partial = pt;
funcexe.fe_selfdict = selfdict;
funcexe.fe_basetv = basetv;
ret = get_func_tv(s, -1, rettv, arg, evalarg, &funcexe);
theend:
// Clear the funcref afterwards, so that deleting it while
// evaluating the arguments is possible (see test55).
if (evaluate)
clear_tv(&functv);
return ret;
}
/*
* Evaluate "->method()".
* "*arg" points to "method".
* Returns FAIL or OK. "*arg" is advanced to after the ')'.
*/
static int
eval_lambda(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int verbose) // give error messages
{
int evaluate = evalarg != NULL
&& (evalarg->eval_flags & EVAL_EVALUATE);
typval_T base = *rettv;
int ret;
rettv->v_type = VAR_UNKNOWN;
if (**arg == '{')
{
// ->{lambda}()
ret = get_lambda_tv(arg, rettv, FALSE, evalarg);
}
else
{
// ->(lambda)()
++*arg;
ret = eval1(arg, rettv, evalarg);
*arg = skipwhite_and_linebreak(*arg, evalarg);
if (**arg == ')')
{
++*arg;
}
else
{
emsg(_(e_missing_closing_paren));
ret = FAIL;
}
}
if (ret != OK)
return FAIL;
else if (**arg != '(')
{
if (verbose)
{
if (*skipwhite(*arg) == '(')
emsg(_(e_no_white_space_allowed_before_parenthesis));
else
semsg(_(e_missing_parenthesis_str), "lambda");
}
clear_tv(rettv);
ret = FAIL;
}
else
ret = call_func_rettv(arg, evalarg, rettv, evaluate, NULL, &base);
// Clear the funcref afterwards, so that deleting it while
// evaluating the arguments is possible (see test55).
if (evaluate)
clear_tv(&base);
return ret;
}
/*
* Evaluate "->method()".
* "*arg" points to "method".
* Returns FAIL or OK. "*arg" is advanced to after the ')'.
*/
static int
eval_method(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int verbose) // give error messages
{
char_u *name;
long len;
char_u *alias;
char_u *tofree = NULL;
typval_T base = *rettv;
int ret = OK;
int evaluate = evalarg != NULL
&& (evalarg->eval_flags & EVAL_EVALUATE);
rettv->v_type = VAR_UNKNOWN;
name = *arg;
len = get_name_len(arg, &alias, evaluate, TRUE);
if (alias != NULL)
name = alias;
if (len <= 0)
{
if (verbose)
emsg(_(e_missing_name_after_method));
ret = FAIL;
}
else
{
char_u *paren;
// If there is no "(" immediately following, but there is further on,
// it can be "import.Func()", "dict.Func()", "list[nr]", etc.
// Does not handle anything where "(" is part of the expression.
*arg = skipwhite(*arg);
if (**arg != '(' && alias == NULL
&& (paren = vim_strchr(*arg, '(')) != NULL)
{
char_u *deref;
*arg = name;
*paren = NUL;
deref = deref_function_name(arg, &tofree, evalarg, verbose);
if (deref == NULL)
{
*arg = name + len;
ret = FAIL;
}
else
{
name = deref;
len = (long)STRLEN(name);
}
*paren = '(';
}
if (ret == OK)
{
*arg = skipwhite(*arg);
if (**arg != '(')
{
if (verbose)
semsg(_(e_missing_parenthesis_str), name);
ret = FAIL;
}
else if (VIM_ISWHITE((*arg)[-1]))
{
if (verbose)
emsg(_(e_no_white_space_allowed_before_parenthesis));
ret = FAIL;
}
else
ret = eval_func(arg, evalarg, name, len, rettv,
evaluate ? EVAL_EVALUATE : 0, &base);
}
}
// Clear the funcref afterwards, so that deleting it while
// evaluating the arguments is possible (see test55).
if (evaluate)
clear_tv(&base);
vim_free(tofree);
return ret;
}
/*
* Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key".
* "*arg" points to the '[' or '.'.
* Returns FAIL or OK. "*arg" is advanced to after the ']'.
*/
static int
eval_index(
char_u **arg,
typval_T *rettv,
evalarg_T *evalarg,
int verbose) // give error messages
{
int evaluate = evalarg != NULL
&& (evalarg->eval_flags & EVAL_EVALUATE);
int empty1 = FALSE, empty2 = FALSE;
typval_T var1, var2;
int range = FALSE;
char_u *key = NULL;
int keylen = -1;
int vim9script = in_vim9script();
if (check_can_index(rettv, evaluate, verbose) == FAIL)
return FAIL;
init_tv(&var1);
init_tv(&var2);
if (**arg == '.')
{
/*
* dict.name
*/
key = *arg + 1;
for (keylen = 0; eval_isdictc(key[keylen]); ++keylen)
;
if (keylen == 0)
return FAIL;
*arg = key + keylen;
}
else
{
/*
* something[idx]
*
* Get the (first) variable from inside the [].
*/
*arg = skipwhite_and_linebreak(*arg + 1, evalarg);
if (**arg == ':')
empty1 = TRUE;
else if (eval1(arg, &var1, evalarg) == FAIL) // recursive!
return FAIL;
else if (vim9script && **arg == ':')
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", *arg);
clear_tv(&var1);
return FAIL;
}
else if (evaluate)
{
int error = FALSE;
#ifdef FEAT_FLOAT
// allow for indexing with float
if (vim9script && rettv->v_type == VAR_DICT
&& var1.v_type == VAR_FLOAT)
{
var1.vval.v_string = typval_tostring(&var1, TRUE);
var1.v_type = VAR_STRING;
}
#endif
if (vim9script && rettv->v_type == VAR_LIST)
tv_get_number_chk(&var1, &error);
else
error = tv_get_string_chk(&var1) == NULL;
if (error)
{
// not a number or string
clear_tv(&var1);
return FAIL;
}
}
/*
* Get the second variable from inside the [:].
*/
*arg = skipwhite_and_linebreak(*arg, evalarg);
if (**arg == ':')
{
range = TRUE;
++*arg;
if (vim9script && !IS_WHITE_OR_NUL(**arg) && **arg != ']')
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", *arg - 1);
if (!empty1)
clear_tv(&var1);
return FAIL;
}
*arg = skipwhite_and_linebreak(*arg, evalarg);
if (**arg == ']')
empty2 = TRUE;
else if (eval1(arg, &var2, evalarg) == FAIL) // recursive!
{
if (!empty1)
clear_tv(&var1);
return FAIL;
}
else if (evaluate && tv_get_string_chk(&var2) == NULL)
{
// not a number or string
if (!empty1)
clear_tv(&var1);
clear_tv(&var2);
return FAIL;
}
}
// Check for the ']'.
*arg = skipwhite_and_linebreak(*arg, evalarg);
if (**arg != ']')
{
if (verbose)
emsg(_(e_missing_closing_square_brace));
clear_tv(&var1);
if (range)
clear_tv(&var2);
return FAIL;
}
*arg = *arg + 1; // skip over the ']'
}
if (evaluate)
{
int res = eval_index_inner(rettv, range,
empty1 ? NULL : &var1, empty2 ? NULL : &var2, FALSE,
key, keylen, verbose);
if (!empty1)
clear_tv(&var1);
if (range)
clear_tv(&var2);
return res;
}
return OK;
}
/*
* Check if "rettv" can have an [index] or [sli:ce]
*/
int
check_can_index(typval_T *rettv, int evaluate, int verbose)
{
switch (rettv->v_type)
{
case VAR_FUNC:
case VAR_PARTIAL:
if (verbose)
emsg(_(e_cannot_index_a_funcref));
return FAIL;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
if (verbose)
emsg(_(e_using_float_as_string));
return FAIL;
#endif
case VAR_BOOL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
case VAR_INSTR:
if (verbose)
emsg(_(e_cannot_index_special_variable));
return FAIL;
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
if (evaluate)
{
emsg(_(e_cannot_index_special_variable));
return FAIL;
}
// FALLTHROUGH
case VAR_STRING:
case VAR_LIST:
case VAR_DICT:
case VAR_BLOB:
break;
case VAR_NUMBER:
if (in_vim9script())
emsg(_(e_cannot_index_number));
break;
}
return OK;
}
/*
* slice() function
*/
void
f_slice(typval_T *argvars, typval_T *rettv)
{
if (in_vim9script()
&& ((argvars[0].v_type != VAR_STRING
&& argvars[0].v_type != VAR_LIST
&& argvars[0].v_type != VAR_BLOB
&& check_for_list_arg(argvars, 0) == FAIL)
|| check_for_number_arg(argvars, 1) == FAIL
|| check_for_opt_number_arg(argvars, 2) == FAIL))
return;
if (check_can_index(argvars, TRUE, FALSE) == OK)
{
copy_tv(argvars, rettv);
eval_index_inner(rettv, TRUE, argvars + 1,
argvars[2].v_type == VAR_UNKNOWN ? NULL : argvars + 2,
TRUE, NULL, 0, FALSE);
}
}
/*
* Apply index or range to "rettv".
* "var1" is the first index, NULL for [:expr].
* "var2" is the second index, NULL for [expr] and [expr: ]
* "exclusive" is TRUE for slice(): second index is exclusive, use character
* index for string.
* Alternatively, "key" is not NULL, then key[keylen] is the dict index.
*/
int
eval_index_inner(
typval_T *rettv,
int is_range,
typval_T *var1,
typval_T *var2,
int exclusive,
char_u *key,
int keylen,
int verbose)
{
varnumber_T n1, n2 = 0;
long len;
n1 = 0;
if (var1 != NULL && rettv->v_type != VAR_DICT)
n1 = tv_get_number(var1);
if (is_range)
{
if (rettv->v_type == VAR_DICT)
{
if (verbose)
emsg(_(e_cannot_slice_dictionary));
return FAIL;
}
if (var2 != NULL)
n2 = tv_get_number(var2);
else
n2 = VARNUM_MAX;
}
switch (rettv->v_type)
{
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_FLOAT:
case VAR_BOOL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
case VAR_INSTR:
break; // not evaluating, skipping over subscript
case VAR_NUMBER:
case VAR_STRING:
{
char_u *s = tv_get_string(rettv);
len = (long)STRLEN(s);
if (in_vim9script() || exclusive)
{
if (is_range)
s = string_slice(s, n1, n2, exclusive);
else
s = char_from_string(s, n1);
}
else if (is_range)
{
// The resulting variable is a substring. If the indexes
// are out of range the result is empty.
if (n1 < 0)
{
n1 = len + n1;
if (n1 < 0)
n1 = 0;
}
if (n2 < 0)
n2 = len + n2;
else if (n2 >= len)
n2 = len;
if (n1 >= len || n2 < 0 || n1 > n2)
s = NULL;
else
s = vim_strnsave(s + n1, n2 - n1 + 1);
}
else
{
// The resulting variable is a string of a single
// character. If the index is too big or negative the
// result is empty.
if (n1 >= len || n1 < 0)
s = NULL;
else
s = vim_strnsave(s + n1, 1);
}
clear_tv(rettv);
rettv->v_type = VAR_STRING;
rettv->vval.v_string = s;
}
break;
case VAR_BLOB:
blob_slice_or_index(rettv->vval.v_blob, is_range, n1, n2,
exclusive, rettv);
break;
case VAR_LIST:
if (var1 == NULL)
n1 = 0;
if (var2 == NULL)
n2 = VARNUM_MAX;
if (list_slice_or_index(rettv->vval.v_list,
is_range, n1, n2, exclusive, rettv, verbose) == FAIL)
return FAIL;
break;
case VAR_DICT:
{
dictitem_T *item;
typval_T tmp;
if (key == NULL)
{
key = tv_get_string_chk(var1);
if (key == NULL)
return FAIL;
}
item = dict_find(rettv->vval.v_dict, key, keylen);
if (item == NULL)
{
if (verbose)
{
if (keylen > 0)
key[keylen] = NUL;
semsg(_(e_key_not_present_in_dictionary), key);
}
return FAIL;
}
copy_tv(&item->di_tv, &tmp);
clear_tv(rettv);
*rettv = tmp;
}
break;
}
return OK;
}
/*
* Return the function name of partial "pt".
*/
char_u *
partial_name(partial_T *pt)
{
if (pt != NULL)
{
if (pt->pt_name != NULL)
return pt->pt_name;
if (pt->pt_func != NULL)
return pt->pt_func->uf_name;
}
return (char_u *)"";
}
static void
partial_free(partial_T *pt)
{
int i;
for (i = 0; i < pt->pt_argc; ++i)
clear_tv(&pt->pt_argv[i]);
vim_free(pt->pt_argv);
dict_unref(pt->pt_dict);
if (pt->pt_name != NULL)
{
func_unref(pt->pt_name);
vim_free(pt->pt_name);
}
else
func_ptr_unref(pt->pt_func);
// "out_up" is no longer used, decrement refcount on partial that owns it.
partial_unref(pt->pt_outer.out_up_partial);
// Using pt_outer from another partial.
partial_unref(pt->pt_outer_partial);
// Decrease the reference count for the context of a closure. If down
// to the minimum it may be time to free it.
if (pt->pt_funcstack != NULL)
{
--pt->pt_funcstack->fs_refcount;
funcstack_check_refcount(pt->pt_funcstack);
}
vim_free(pt);
}
/*
* Unreference a closure: decrement the reference count and free it when it
* becomes zero.
*/
void
partial_unref(partial_T *pt)
{
if (pt != NULL)
{
if (--pt->pt_refcount <= 0)
partial_free(pt);
// If the reference count goes down to one, the funcstack may be the
// only reference and can be freed if no other partials reference it.
else if (pt->pt_refcount == 1 && pt->pt_funcstack != NULL)
funcstack_check_refcount(pt->pt_funcstack);
}
}
/*
* Return the next (unique) copy ID.
* Used for serializing nested structures.
*/
int
get_copyID(void)
{
current_copyID += COPYID_INC;
return current_copyID;
}
/*
* Garbage collection for lists and dictionaries.
*
* We use reference counts to be able to free most items right away when they
* are no longer used. But for composite items it's possible that it becomes
* unused while the reference count is > 0: When there is a recursive
* reference. Example:
* :let l = [1, 2, 3]
* :let d = {9: l}
* :let l[1] = d
*
* Since this is quite unusual we handle this with garbage collection: every
* once in a while find out which lists and dicts are not referenced from any
* variable.
*
* Here is a good reference text about garbage collection (refers to Python
* but it applies to all reference-counting mechanisms):
* http://python.ca/nas/python/gc/
*/
/*
* Do garbage collection for lists and dicts.
* When "testing" is TRUE this is called from test_garbagecollect_now().
* Return TRUE if some memory was freed.
*/
int
garbage_collect(int testing)
{
int copyID;
int abort = FALSE;
buf_T *buf;
win_T *wp;
int did_free = FALSE;
tabpage_T *tp;
if (!testing)
{
// Only do this once.
want_garbage_collect = FALSE;
may_garbage_collect = FALSE;
garbage_collect_at_exit = FALSE;
}
// The execution stack can grow big, limit the size.
if (exestack.ga_maxlen - exestack.ga_len > 500)
{
size_t new_len;
char_u *pp;
int n;
// Keep 150% of the current size, with a minimum of the growth size.
n = exestack.ga_len / 2;
if (n < exestack.ga_growsize)
n = exestack.ga_growsize;
// Don't make it bigger though.
if (exestack.ga_len + n < exestack.ga_maxlen)
{
new_len = (size_t)exestack.ga_itemsize * (exestack.ga_len + n);
pp = vim_realloc(exestack.ga_data, new_len);
if (pp == NULL)
return FAIL;
exestack.ga_maxlen = exestack.ga_len + n;
exestack.ga_data = pp;
}
}
// We advance by two because we add one for items referenced through
// previous_funccal.
copyID = get_copyID();
/*
* 1. Go through all accessible variables and mark all lists and dicts
* with copyID.
*/
// Don't free variables in the previous_funccal list unless they are only
// referenced through previous_funccal. This must be first, because if
// the item is referenced elsewhere the funccal must not be freed.
abort = abort || set_ref_in_previous_funccal(copyID);
// script-local variables
abort = abort || garbage_collect_scriptvars(copyID);
// buffer-local variables
FOR_ALL_BUFFERS(buf)
abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
NULL, NULL);
// window-local variables
FOR_ALL_TAB_WINDOWS(tp, wp)
abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
NULL, NULL);
if (aucmd_win != NULL)
abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID,
NULL, NULL);
#ifdef FEAT_PROP_POPUP
FOR_ALL_POPUPWINS(wp)
abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
NULL, NULL);
FOR_ALL_TABPAGES(tp)
FOR_ALL_POPUPWINS_IN_TAB(tp, wp)
abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
NULL, NULL);
#endif
// tabpage-local variables
FOR_ALL_TABPAGES(tp)
abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID,
NULL, NULL);
// global variables
abort = abort || garbage_collect_globvars(copyID);
// function-local variables
abort = abort || set_ref_in_call_stack(copyID);
// named functions (matters for closures)
abort = abort || set_ref_in_functions(copyID);
// function call arguments, if v:testing is set.
abort = abort || set_ref_in_func_args(copyID);
// funcstacks keep variables for closures
abort = abort || set_ref_in_funcstacks(copyID);
// v: vars
abort = abort || garbage_collect_vimvars(copyID);
// callbacks in buffers
abort = abort || set_ref_in_buffers(copyID);
// 'completefunc', 'omnifunc' and 'thesaurusfunc' callbacks
abort = abort || set_ref_in_insexpand_funcs(copyID);
// 'operatorfunc' callback
abort = abort || set_ref_in_opfunc(copyID);
// 'tagfunc' callback
abort = abort || set_ref_in_tagfunc(copyID);
// 'imactivatefunc' and 'imstatusfunc' callbacks
abort = abort || set_ref_in_im_funcs(copyID);
#ifdef FEAT_LUA
abort = abort || set_ref_in_lua(copyID);
#endif
#ifdef FEAT_PYTHON
abort = abort || set_ref_in_python(copyID);
#endif
#ifdef FEAT_PYTHON3
abort = abort || set_ref_in_python3(copyID);
#endif
#ifdef FEAT_JOB_CHANNEL
abort = abort || set_ref_in_channel(copyID);
abort = abort || set_ref_in_job(copyID);
#endif
#ifdef FEAT_NETBEANS_INTG
abort = abort || set_ref_in_nb_channel(copyID);
#endif
#ifdef FEAT_TIMERS
abort = abort || set_ref_in_timer(copyID);
#endif
#ifdef FEAT_QUICKFIX
abort = abort || set_ref_in_quickfix(copyID);
#endif
#ifdef FEAT_TERMINAL
abort = abort || set_ref_in_term(copyID);
#endif
#ifdef FEAT_PROP_POPUP
abort = abort || set_ref_in_popups(copyID);
#endif
if (!abort)
{
/*
* 2. Free lists and dictionaries that are not referenced.
*/
did_free = free_unref_items(copyID);
/*
* 3. Check if any funccal can be freed now.
* This may call us back recursively.
*/
free_unref_funccal(copyID, testing);
}
else if (p_verbose > 0)
{
verb_msg(_("Not enough memory to set references, garbage collection aborted!"));
}
return did_free;
}
/*
* Free lists, dictionaries, channels and jobs that are no longer referenced.
*/
static int
free_unref_items(int copyID)
{
int did_free = FALSE;
// Let all "free" functions know that we are here. This means no
// dictionaries, lists, channels or jobs are to be freed, because we will
// do that here.
in_free_unref_items = TRUE;
/*
* PASS 1: free the contents of the items. We don't free the items
* themselves yet, so that it is possible to decrement refcount counters
*/
// Go through the list of dicts and free items without the copyID.
did_free |= dict_free_nonref(copyID);
// Go through the list of lists and free items without the copyID.
did_free |= list_free_nonref(copyID);
#ifdef FEAT_JOB_CHANNEL
// Go through the list of jobs and free items without the copyID. This
// must happen before doing channels, because jobs refer to channels, but
// the reference from the channel to the job isn't tracked.
did_free |= free_unused_jobs_contents(copyID, COPYID_MASK);
// Go through the list of channels and free items without the copyID.
did_free |= free_unused_channels_contents(copyID, COPYID_MASK);
#endif
/*
* PASS 2: free the items themselves.
*/
dict_free_items(copyID);
list_free_items(copyID);
#ifdef FEAT_JOB_CHANNEL
// Go through the list of jobs and free items without the copyID. This
// must happen before doing channels, because jobs refer to channels, but
// the reference from the channel to the job isn't tracked.
free_unused_jobs(copyID, COPYID_MASK);
// Go through the list of channels and free items without the copyID.
free_unused_channels(copyID, COPYID_MASK);
#endif
in_free_unref_items = FALSE;
return did_free;
}
/*
* Mark all lists and dicts referenced through hashtab "ht" with "copyID".
* "list_stack" is used to add lists to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack)
{
int todo;
int abort = FALSE;
hashitem_T *hi;
hashtab_T *cur_ht;
ht_stack_T *ht_stack = NULL;
ht_stack_T *tempitem;
cur_ht = ht;
for (;;)
{
if (!abort)
{
// Mark each item in the hashtab. If the item contains a hashtab
// it is added to ht_stack, if it contains a list it is added to
// list_stack.
todo = (int)cur_ht->ht_used;
for (hi = cur_ht->ht_array; todo > 0; ++hi)
if (!HASHITEM_EMPTY(hi))
{
--todo;
abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID,
&ht_stack, list_stack);
}
}
if (ht_stack == NULL)
break;
// take an item from the stack
cur_ht = ht_stack->ht;
tempitem = ht_stack;
ht_stack = ht_stack->prev;
free(tempitem);
}
return abort;
}
#if defined(FEAT_LUA) || defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) \
|| defined(PROTO)
/*
* Mark a dict and its items with "copyID".
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_dict(dict_T *d, int copyID)
{
if (d != NULL && d->dv_copyID != copyID)
{
d->dv_copyID = copyID;
return set_ref_in_ht(&d->dv_hashtab, copyID, NULL);
}
return FALSE;
}
#endif
/*
* Mark a list and its items with "copyID".
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_list(list_T *ll, int copyID)
{
if (ll != NULL && ll->lv_copyID != copyID)
{
ll->lv_copyID = copyID;
return set_ref_in_list_items(ll, copyID, NULL);
}
return FALSE;
}
/*
* Mark all lists and dicts referenced through list "l" with "copyID".
* "ht_stack" is used to add hashtabs to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_list_items(list_T *l, int copyID, ht_stack_T **ht_stack)
{
listitem_T *li;
int abort = FALSE;
list_T *cur_l;
list_stack_T *list_stack = NULL;
list_stack_T *tempitem;
cur_l = l;
for (;;)
{
if (!abort && cur_l->lv_first != &range_list_item)
// Mark each item in the list. If the item contains a hashtab
// it is added to ht_stack, if it contains a list it is added to
// list_stack.
for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next)
abort = abort || set_ref_in_item(&li->li_tv, copyID,
ht_stack, &list_stack);
if (list_stack == NULL)
break;
// take an item from the stack
cur_l = list_stack->list;
tempitem = list_stack;
list_stack = list_stack->prev;
free(tempitem);
}
return abort;
}
/*
* Mark the partial in callback 'cb' with "copyID".
*/
int
set_ref_in_callback(callback_T *cb, int copyID)
{
typval_T tv;
if (cb->cb_name == NULL || *cb->cb_name == NUL || cb->cb_partial == NULL)
return FALSE;
tv.v_type = VAR_PARTIAL;
tv.vval.v_partial = cb->cb_partial;
return set_ref_in_item(&tv, copyID, NULL, NULL);
}
/*
* Mark all lists and dicts referenced through typval "tv" with "copyID".
* "list_stack" is used to add lists to be marked. Can be NULL.
* "ht_stack" is used to add hashtabs to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_item(
typval_T *tv,
int copyID,
ht_stack_T **ht_stack,
list_stack_T **list_stack)
{
int abort = FALSE;
if (tv->v_type == VAR_DICT)
{
dict_T *dd = tv->vval.v_dict;
if (dd != NULL && dd->dv_copyID != copyID)
{
// Didn't see this dict yet.
dd->dv_copyID = copyID;
if (ht_stack == NULL)
{
abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack);
}
else
{
ht_stack_T *newitem = ALLOC_ONE(ht_stack_T);
if (newitem == NULL)
abort = TRUE;
else
{
newitem->ht = &dd->dv_hashtab;
newitem->prev = *ht_stack;
*ht_stack = newitem;
}
}
}
}
else if (tv->v_type == VAR_LIST)
{
list_T *ll = tv->vval.v_list;
if (ll != NULL && ll->lv_copyID != copyID)
{
// Didn't see this list yet.
ll->lv_copyID = copyID;
if (list_stack == NULL)
{
abort = set_ref_in_list_items(ll, copyID, ht_stack);
}
else
{
list_stack_T *newitem = ALLOC_ONE(list_stack_T);
if (newitem == NULL)
abort = TRUE;
else
{
newitem->list = ll;
newitem->prev = *list_stack;
*list_stack = newitem;
}
}
}
}
else if (tv->v_type == VAR_FUNC)
{
abort = set_ref_in_func(tv->vval.v_string, NULL, copyID);
}
else if (tv->v_type == VAR_PARTIAL)
{
partial_T *pt = tv->vval.v_partial;
int i;
if (pt != NULL && pt->pt_copyID != copyID)
{
// Didn't see this partial yet.
pt->pt_copyID = copyID;
abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID);
if (pt->pt_dict != NULL)
{
typval_T dtv;
dtv.v_type = VAR_DICT;
dtv.vval.v_dict = pt->pt_dict;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
for (i = 0; i < pt->pt_argc; ++i)
abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID,
ht_stack, list_stack);
// pt_funcstack is handled in set_ref_in_funcstacks()
}
}
#ifdef FEAT_JOB_CHANNEL
else if (tv->v_type == VAR_JOB)
{
job_T *job = tv->vval.v_job;
typval_T dtv;
if (job != NULL && job->jv_copyID != copyID)
{
job->jv_copyID = copyID;
if (job->jv_channel != NULL)
{
dtv.v_type = VAR_CHANNEL;
dtv.vval.v_channel = job->jv_channel;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (job->jv_exit_cb.cb_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = job->jv_exit_cb.cb_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
}
else if (tv->v_type == VAR_CHANNEL)
{
channel_T *ch =tv->vval.v_channel;
ch_part_T part;
typval_T dtv;
jsonq_T *jq;
cbq_T *cq;
if (ch != NULL && ch->ch_copyID != copyID)
{
ch->ch_copyID = copyID;
for (part = PART_SOCK; part < PART_COUNT; ++part)
{
for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL;
jq = jq->jq_next)
set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack);
for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL;
cq = cq->cq_next)
if (cq->cq_callback.cb_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = cq->cq_callback.cb_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (ch->ch_part[part].ch_callback.cb_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial =
ch->ch_part[part].ch_callback.cb_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
if (ch->ch_callback.cb_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = ch->ch_callback.cb_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (ch->ch_close_cb.cb_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = ch->ch_close_cb.cb_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
}
#endif
return abort;
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
* "numbuf" is used for a number.
* When "copyID" is not NULL replace recursive lists and dicts with "...".
* When both "echo_style" and "composite_val" are FALSE, put quotes around
* strings as "string()", otherwise does not put quotes around strings, as
* ":echo" displays values.
* When "restore_copyID" is FALSE, repeated items in dictionaries and lists
* are replaced with "...".
* May return NULL.
*/
char_u *
echo_string_core(
typval_T *tv,
char_u **tofree,
char_u *numbuf,
int copyID,
int echo_style,
int restore_copyID,
int composite_val)
{
static int recurse = 0;
char_u *r = NULL;
if (recurse >= DICT_MAXNEST)
{
if (!did_echo_string_emsg)
{
// Only give this message once for a recursive call to avoid
// flooding the user with errors. And stop iterating over lists
// and dicts.
did_echo_string_emsg = TRUE;
emsg(_(e_variable_nested_too_deep_for_displaying));
}
*tofree = NULL;
return (char_u *)"{E724}";
}
++recurse;
switch (tv->v_type)
{
case VAR_STRING:
if (echo_style && !composite_val)
{
*tofree = NULL;
r = tv->vval.v_string;
if (r == NULL)
r = (char_u *)"";
}
else
{
*tofree = string_quote(tv->vval.v_string, FALSE);
r = *tofree;
}
break;
case VAR_FUNC:
if (echo_style)
{
*tofree = NULL;
r = tv->vval.v_string;
}
else
{
*tofree = string_quote(tv->vval.v_string, TRUE);
r = *tofree;
}
break;
case VAR_PARTIAL:
{
partial_T *pt = tv->vval.v_partial;
char_u *fname = string_quote(pt == NULL ? NULL
: partial_name(pt), FALSE);
garray_T ga;
int i;
char_u *tf;
ga_init2(&ga, 1, 100);
ga_concat(&ga, (char_u *)"function(");
if (fname != NULL)
{
// When using uf_name prepend "g:" for a global function.
if (pt != NULL && pt->pt_name == NULL && fname[0] == '\''
&& vim_isupper(fname[1]))
{
ga_concat(&ga, (char_u *)"'g:");
ga_concat(&ga, fname + 1);
}
else
ga_concat(&ga, fname);
vim_free(fname);
}
if (pt != NULL && pt->pt_argc > 0)
{
ga_concat(&ga, (char_u *)", [");
for (i = 0; i < pt->pt_argc; ++i)
{
if (i > 0)
ga_concat(&ga, (char_u *)", ");
ga_concat(&ga,
tv2string(&pt->pt_argv[i], &tf, numbuf, copyID));
vim_free(tf);
}
ga_concat(&ga, (char_u *)"]");
}
if (pt != NULL && pt->pt_dict != NULL)
{
typval_T dtv;
ga_concat(&ga, (char_u *)", ");
dtv.v_type = VAR_DICT;
dtv.vval.v_dict = pt->pt_dict;
ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID));
vim_free(tf);
}
// terminate with ')' and a NUL
ga_concat_len(&ga, (char_u *)")", 2);
*tofree = ga.ga_data;
r = *tofree;
break;
}
case VAR_BLOB:
r = blob2string(tv->vval.v_blob, tofree, numbuf);
break;
case VAR_LIST:
if (tv->vval.v_list == NULL)
{
// NULL list is equivalent to empty list.
*tofree = NULL;
r = (char_u *)"[]";
}
else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID
&& tv->vval.v_list->lv_len > 0)
{
*tofree = NULL;
r = (char_u *)"[...]";
}
else
{
int old_copyID = tv->vval.v_list->lv_copyID;
tv->vval.v_list->lv_copyID = copyID;
*tofree = list2string(tv, copyID, restore_copyID);
if (restore_copyID)
tv->vval.v_list->lv_copyID = old_copyID;
r = *tofree;
}
break;
case VAR_DICT:
if (tv->vval.v_dict == NULL)
{
// NULL dict is equivalent to empty dict.
*tofree = NULL;
r = (char_u *)"{}";
}
else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID
&& tv->vval.v_dict->dv_hashtab.ht_used != 0)
{
*tofree = NULL;
r = (char_u *)"{...}";
}
else
{
int old_copyID = tv->vval.v_dict->dv_copyID;
tv->vval.v_dict->dv_copyID = copyID;
*tofree = dict2string(tv, copyID, restore_copyID);
if (restore_copyID)
tv->vval.v_dict->dv_copyID = old_copyID;
r = *tofree;
}
break;
case VAR_NUMBER:
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
*tofree = NULL;
r = tv_get_string_buf(tv, numbuf);
break;
case VAR_JOB:
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
*tofree = NULL;
r = tv->v_type == VAR_JOB ? job_to_string_buf(tv, numbuf)
: channel_to_string_buf(tv, numbuf);
if (composite_val)
{
*tofree = string_quote(r, FALSE);
r = *tofree;
}
#endif
break;
case VAR_INSTR:
*tofree = NULL;
r = (char_u *)"instructions";
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
*tofree = NULL;
vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float);
r = numbuf;
break;
#endif
case VAR_BOOL:
case VAR_SPECIAL:
*tofree = NULL;
r = (char_u *)get_var_special_name(tv->vval.v_number);
break;
}
if (--recurse == 0)
did_echo_string_emsg = FALSE;
return r;
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
* "numbuf" is used for a number.
* Does not put quotes around strings, as ":echo" displays values.
* When "copyID" is not NULL replace recursive lists and dicts with "...".
* May return NULL.
*/
char_u *
echo_string(
typval_T *tv,
char_u **tofree,
char_u *numbuf,
int copyID)
{
return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE);
}
/*
* Convert the specified byte index of line 'lnum' in buffer 'buf' to a
* character index. Works only for loaded buffers. Returns -1 on failure.
* The index of the first byte and the first character is zero.
*/
int
buf_byteidx_to_charidx(buf_T *buf, int lnum, int byteidx)
{
char_u *str;
char_u *t;
int count;
if (buf == NULL || buf->b_ml.ml_mfp == NULL)
return -1;
if (lnum > buf->b_ml.ml_line_count)
lnum = buf->b_ml.ml_line_count;
str = ml_get_buf(buf, lnum, FALSE);
if (str == NULL)
return -1;
if (*str == NUL)
return 0;
// count the number of characters
t = str;
for (count = 0; *t != NUL && t <= str + byteidx; count++)
t += mb_ptr2len(t);
// In insert mode, when the cursor is at the end of a non-empty line,
// byteidx points to the NUL character immediately past the end of the
// string. In this case, add one to the character count.
if (*t == NUL && byteidx != 0 && t == str + byteidx)
count++;
return count - 1;
}
/*
* Convert the specified character index of line 'lnum' in buffer 'buf' to a
* byte index. Works only for loaded buffers. Returns -1 on failure.
* The index of the first byte and the first character is zero.
*/
int
buf_charidx_to_byteidx(buf_T *buf, int lnum, int charidx)
{
char_u *str;
char_u *t;
if (buf == NULL || buf->b_ml.ml_mfp == NULL)
return -1;
if (lnum > buf->b_ml.ml_line_count)
lnum = buf->b_ml.ml_line_count;
str = ml_get_buf(buf, lnum, FALSE);
if (str == NULL)
return -1;
// Convert the character offset to a byte offset
t = str;
while (*t != NUL && --charidx > 0)
t += mb_ptr2len(t);
return t - str;
}
/*
* Translate a String variable into a position.
* Returns NULL when there is an error.
*/
pos_T *
var2fpos(
typval_T *varp,
int dollar_lnum, // TRUE when $ is last line
int *fnum, // set to fnum for '0, 'A, etc.
int charcol) // return character column
{
char_u *name;
static pos_T pos;
pos_T *pp;
// Argument can be [lnum, col, coladd].
if (varp->v_type == VAR_LIST)
{
list_T *l;
int len;
int error = FALSE;
listitem_T *li;
l = varp->vval.v_list;
if (l == NULL)
return NULL;
// Get the line number
pos.lnum = list_find_nr(l, 0L, &error);
if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
return NULL; // invalid line number
if (charcol)
len = (long)mb_charlen(ml_get(pos.lnum));
else
len = (long)STRLEN(ml_get(pos.lnum));
// Get the column number
// We accept "$" for the column number: last column.
li = list_find(l, 1L);
if (li != NULL && li->li_tv.v_type == VAR_STRING
&& li->li_tv.vval.v_string != NULL
&& STRCMP(li->li_tv.vval.v_string, "$") == 0)
{
pos.col = len + 1;
}
else
{
pos.col = list_find_nr(l, 1L, &error);
if (error)
return NULL;
}
// Accept a position up to the NUL after the line.
if (pos.col == 0 || (int)pos.col > len + 1)
return NULL; // invalid column number
--pos.col;
// Get the virtual offset. Defaults to zero.
pos.coladd = list_find_nr(l, 2L, &error);
if (error)
pos.coladd = 0;
return &pos;
}
if (in_vim9script() && check_for_string_arg(varp, 0) == FAIL)
return NULL;
name = tv_get_string_chk(varp);
if (name == NULL)
return NULL;
if (name[0] == '.' && (!in_vim9script() || name[1] == NUL))
{
// cursor
pos = curwin->w_cursor;
if (charcol)
pos.col = buf_byteidx_to_charidx(curbuf, pos.lnum, pos.col);
return &pos;
}
if (name[0] == 'v' && name[1] == NUL) // Visual start
{
if (VIsual_active)
pos = VIsual;
else
pos = curwin->w_cursor;
if (charcol)
pos.col = buf_byteidx_to_charidx(curbuf, pos.lnum, pos.col);
return &pos;
}
if (name[0] == '\'' && (!in_vim9script()
|| (name[1] != NUL && name[2] == NUL)))
{
// mark
pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
return NULL;
if (charcol)
pp->col = buf_byteidx_to_charidx(curbuf, pp->lnum, pp->col);
return pp;
}
pos.coladd = 0;
if (name[0] == 'w' && dollar_lnum)
{
pos.col = 0;
if (name[1] == '0') // "w0": first visible line
{
update_topline();
// In silent Ex mode topline is zero, but that's not a valid line
// number; use one instead.
pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1;
return &pos;
}
else if (name[1] == '$') // "w$": last visible line
{
validate_botline();
// In silent Ex mode botline is zero, return zero then.
pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0;
return &pos;
}
}
else if (name[0] == '$') // last column or line
{
if (dollar_lnum)
{
pos.lnum = curbuf->b_ml.ml_line_count;
pos.col = 0;
}
else
{
pos.lnum = curwin->w_cursor.lnum;
if (charcol)
pos.col = (colnr_T)mb_charlen(ml_get_curline());
else
pos.col = (colnr_T)STRLEN(ml_get_curline());
}
return &pos;
}
if (in_vim9script())
semsg(_(e_invalid_value_for_line_number_str), name);
return NULL;
}
/*
* Convert list in "arg" into a position and optional file number.
* When "fnump" is NULL there is no file number, only 3 items.
* Note that the column is passed on as-is, the caller may want to decrement
* it to use 1 for the first column.
* Return FAIL when conversion is not possible, doesn't check the position for
* validity.
*/
int
list2fpos(
typval_T *arg,
pos_T *posp,
int *fnump,
colnr_T *curswantp,
int charcol)
{
list_T *l = arg->vval.v_list;
long i = 0;
long n;
// List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
// there when "fnump" isn't NULL; "coladd" and "curswant" are optional.
if (arg->v_type != VAR_LIST
|| l == NULL
|| l->lv_len < (fnump == NULL ? 2 : 3)
|| l->lv_len > (fnump == NULL ? 4 : 5))
return FAIL;
if (fnump != NULL)
{
n = list_find_nr(l, i++, NULL); // fnum
if (n < 0)
return FAIL;
if (n == 0)
n = curbuf->b_fnum; // current buffer
*fnump = n;
}
n = list_find_nr(l, i++, NULL); // lnum
if (n < 0)
return FAIL;
posp->lnum = n;
n = list_find_nr(l, i++, NULL); // col
if (n < 0)
return FAIL;
// If character position is specified, then convert to byte position
if (charcol)
{
buf_T *buf;
// Get the text for the specified line in a loaded buffer
buf = buflist_findnr(fnump == NULL ? curbuf->b_fnum : *fnump);
if (buf == NULL || buf->b_ml.ml_mfp == NULL)
return FAIL;
n = buf_charidx_to_byteidx(buf, posp->lnum, n) + 1;
}
posp->col = n;
n = list_find_nr(l, i, NULL); // off
if (n < 0)
posp->coladd = 0;
else
posp->coladd = n;
if (curswantp != NULL)
*curswantp = list_find_nr(l, i + 1, NULL); // curswant
return OK;
}
/*
* Get the length of an environment variable name.
* Advance "arg" to the first character after the name.
* Return 0 for error.
*/
int
get_env_len(char_u **arg)
{
char_u *p;
int len;
for (p = *arg; vim_isIDc(*p); ++p)
;
if (p == *arg) // no name found
return 0;
len = (int)(p - *arg);
*arg = p;
return len;
}
/*
* Get the length of the name of a function or internal variable.
* "arg" is advanced to after the name.
* Return 0 if something is wrong.
*/
int
get_id_len(char_u **arg)
{
char_u *p;
int len;
// Find the end of the name.
for (p = *arg; eval_isnamec(*p); ++p)
{
if (*p == ':')
{
// "s:" is start of "s:var", but "n:" is not and can be used in
// slice "[n:]". Also "xx:" is not a namespace.
len = (int)(p - *arg);
if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL)
|| len > 1)
break;
}
}
if (p == *arg) // no name found
return 0;
len = (int)(p - *arg);
*arg = p;
return len;
}
/*
* Get the length of the name of a variable or function.
* Only the name is recognized, does not handle ".key" or "[idx]".
* "arg" is advanced to the first non-white character after the name.
* Return -1 if curly braces expansion failed.
* Return 0 if something else is wrong.
* If the name contains 'magic' {}'s, expand them and return the
* expanded name in an allocated string via 'alias' - caller must free.
*/
int
get_name_len(
char_u **arg,
char_u **alias,
int evaluate,
int verbose)
{
int len;
char_u *p;
char_u *expr_start;
char_u *expr_end;
*alias = NULL; // default to no alias
if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
&& (*arg)[2] == (int)KE_SNR)
{
// hard coded <SNR>, already translated
*arg += 3;
return get_id_len(arg) + 3;
}
len = eval_fname_script(*arg);
if (len > 0)
{
// literal "<SID>", "s:" or "<SNR>"
*arg += len;
}
/*
* Find the end of the name; check for {} construction.
*/
p = find_name_end(*arg, &expr_start, &expr_end,
len > 0 ? 0 : FNE_CHECK_START);
if (expr_start != NULL)
{
char_u *temp_string;
if (!evaluate)
{
len += (int)(p - *arg);
*arg = skipwhite(p);
return len;
}
/*
* Include any <SID> etc in the expanded string:
* Thus the -len here.
*/
temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
if (temp_string == NULL)
return -1;
*alias = temp_string;
*arg = skipwhite(p);
return (int)STRLEN(temp_string);
}
len += get_id_len(arg);
// Only give an error when there is something, otherwise it will be
// reported at a higher level.
if (len == 0 && verbose && **arg != NUL)
semsg(_(e_invalid_expression_str), *arg);
return len;
}
/*
* Find the end of a variable or function name, taking care of magic braces.
* If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
* start and end of the first magic braces item.
* "flags" can have FNE_INCL_BR and FNE_CHECK_START.
* Return a pointer to just after the name. Equal to "arg" if there is no
* valid name.
*/
char_u *
find_name_end(
char_u *arg,
char_u **expr_start,
char_u **expr_end,
int flags)
{
int mb_nest = 0;
int br_nest = 0;
char_u *p;
int len;
int vim9script = in_vim9script();
if (expr_start != NULL)
{
*expr_start = NULL;
*expr_end = NULL;
}
// Quick check for valid starting character.
if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg)
&& (*arg != '{' || vim9script))
return arg;
for (p = arg; *p != NUL
&& (eval_isnamec(*p)
|| (*p == '{' && !vim9script)
|| ((flags & FNE_INCL_BR) && (*p == '['
|| (*p == '.' && eval_isdictc(p[1]))))
|| mb_nest != 0
|| br_nest != 0); MB_PTR_ADV(p))
{
if (*p == '\'')
{
// skip over 'string' to avoid counting [ and ] inside it.
for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p))
;
if (*p == NUL)
break;
}
else if (*p == '"')
{
// skip over "str\"ing" to avoid counting [ and ] inside it.
for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p))
if (*p == '\\' && p[1] != NUL)
++p;
if (*p == NUL)
break;
}
else if (br_nest == 0 && mb_nest == 0 && *p == ':')
{
// "s:" is start of "s:var", but "n:" is not and can be used in
// slice "[n:]". Also "xx:" is not a namespace. But {ns}: is.
len = (int)(p - arg);
if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL)
|| (len > 1 && p[-1] != '}'))
break;
}
if (mb_nest == 0)
{
if (*p == '[')
++br_nest;
else if (*p == ']')
--br_nest;
}
if (br_nest == 0 && !vim9script)
{
if (*p == '{')
{
mb_nest++;
if (expr_start != NULL && *expr_start == NULL)
*expr_start = p;
}
else if (*p == '}')
{
mb_nest--;
if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
*expr_end = p;
}
}
}
return p;
}
/*
* Expands out the 'magic' {}'s in a variable/function name.
* Note that this can call itself recursively, to deal with
* constructs like foo{bar}{baz}{bam}
* The four pointer arguments point to "foo{expre}ss{ion}bar"
* "in_start" ^
* "expr_start" ^
* "expr_end" ^
* "in_end" ^
*
* Returns a new allocated string, which the caller must free.
* Returns NULL for failure.
*/
static char_u *
make_expanded_name(
char_u *in_start,
char_u *expr_start,
char_u *expr_end,
char_u *in_end)
{
char_u c1;
char_u *retval = NULL;
char_u *temp_result;
if (expr_end == NULL || in_end == NULL)
return NULL;
*expr_start = NUL;
*expr_end = NUL;
c1 = *in_end;
*in_end = NUL;
temp_result = eval_to_string(expr_start + 1, FALSE);
if (temp_result != NULL)
{
retval = alloc(STRLEN(temp_result) + (expr_start - in_start)
+ (in_end - expr_end) + 1);
if (retval != NULL)
{
STRCPY(retval, in_start);
STRCAT(retval, temp_result);
STRCAT(retval, expr_end + 1);
}
}
vim_free(temp_result);
*in_end = c1; // put char back for error messages
*expr_start = '{';
*expr_end = '}';
if (retval != NULL)
{
temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
if (expr_start != NULL)
{
// Further expansion!
temp_result = make_expanded_name(retval, expr_start,
expr_end, temp_result);
vim_free(retval);
retval = temp_result;
}
}
return retval;
}
/*
* Return TRUE if character "c" can be used in a variable or function name.
* Does not include '{' or '}' for magic braces.
*/
int
eval_isnamec(int c)
{
return ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR;
}
/*
* Return TRUE if character "c" can be used as the first character in a
* variable or function name (excluding '{' and '}').
*/
int
eval_isnamec1(int c)
{
return ASCII_ISALPHA(c) || c == '_';
}
/*
* Return TRUE if character "c" can be used as the first character of a
* dictionary key.
*/
int
eval_isdictc(int c)
{
return ASCII_ISALNUM(c) || c == '_';
}
/*
* Handle:
* - expr[expr], expr[expr:expr] subscript
* - ".name" lookup
* - function call with Funcref variable: func(expr)
* - method call: var->method()
*
* Can all be combined in any order: dict.func(expr)[idx]['func'](expr)->len()
* "name_start" points to a variable before the subscript or is NULL.
*/
int
handle_subscript(
char_u **arg,
char_u *name_start,
typval_T *rettv,
evalarg_T *evalarg,
int verbose) // give error messages
{
int evaluate = evalarg != NULL
&& (evalarg->eval_flags & EVAL_EVALUATE);
int ret = OK;
dict_T *selfdict = NULL;
int check_white = TRUE;
int getnext;
char_u *p;
while (ret == OK)
{
// When at the end of the line and ".name" or "->{" or "->X" follows in
// the next line then consume the line break.
p = eval_next_non_blank(*arg, evalarg, &getnext);
if (getnext
&& ((rettv->v_type == VAR_DICT && *p == '.' && eval_isdictc(p[1]))
|| (p[0] == '-' && p[1] == '>' && (p[2] == '{'
|| ASCII_ISALPHA(in_vim9script() ? *skipwhite(p + 2)
: p[2])))))
{
*arg = eval_next_line(evalarg);
p = *arg;
check_white = FALSE;
}
if (rettv->v_type == VAR_ANY)
{
char_u *exp_name;
int cc;
int idx;
ufunc_T *ufunc;
type_T *type;
// Found script from "import {name} as name", script item name must
// follow. "rettv->vval.v_number" has the script ID.
if (**arg != '.')
{
if (verbose)
semsg(_(e_expected_dot_after_name_str),
name_start != NULL ? name_start: *arg);
ret = FAIL;
break;
}
++*arg;
if (IS_WHITE_OR_NUL(**arg))
{
if (verbose)
emsg(_(e_no_white_space_allowed_after_dot));
ret = FAIL;
break;
}
// isolate the name
exp_name = *arg;
while (eval_isnamec(**arg))
++*arg;
cc = **arg;
**arg = NUL;
idx = find_exported(rettv->vval.v_number, exp_name, &ufunc, &type,
evalarg->eval_cctx, evalarg->eval_cstack, verbose);
**arg = cc;
if (idx < 0 && ufunc == NULL)
{
ret = FAIL;
break;
}
if (idx >= 0)
{
scriptitem_T *si = SCRIPT_ITEM(rettv->vval.v_number);
svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
copy_tv(sv->sv_tv, rettv);
}
else
{
rettv->v_type = VAR_FUNC;
rettv->vval.v_string = vim_strsave(ufunc->uf_name);
}
continue;
}
if ((**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC
|| rettv->v_type == VAR_PARTIAL))
&& (!check_white || !VIM_ISWHITE(*(*arg - 1))))
{
ret = call_func_rettv(arg, evalarg, rettv, evaluate,
selfdict, NULL);
// Stop the expression evaluation when immediately aborting on
// error, or when an interrupt occurred or an exception was thrown
// but not caught.
if (aborting())
{
if (ret == OK)
clear_tv(rettv);
ret = FAIL;
}
dict_unref(selfdict);
selfdict = NULL;
}
else if (p[0] == '-' && p[1] == '>')
{
if (in_vim9script())
*arg = skipwhite(p + 2);
else
*arg = p + 2;
if (ret == OK)
{
if (VIM_ISWHITE(**arg))
{
emsg(_(e_no_white_space_allowed_before_parenthesis));
ret = FAIL;
}
else if ((**arg == '{' && !in_vim9script()) || **arg == '(')
// expr->{lambda}() or expr->(lambda)()
ret = eval_lambda(arg, rettv, evalarg, verbose);
else
// expr->name()
ret = eval_method(arg, rettv, evalarg, verbose);
}
}
// "." is ".name" lookup when we found a dict or when evaluating and
// scriptversion is at least 2, where string concatenation is "..".
else if (**arg == '['
|| (**arg == '.' && (rettv->v_type == VAR_DICT
|| (!evaluate
&& (*arg)[1] != '.'
&& !in_old_script(2)))))
{
dict_unref(selfdict);
if (rettv->v_type == VAR_DICT)
{
selfdict = rettv->vval.v_dict;
if (selfdict != NULL)
++selfdict->dv_refcount;
}
else
selfdict = NULL;
if (eval_index(arg, rettv, evalarg, verbose) == FAIL)
{
clear_tv(rettv);
ret = FAIL;
}
}
else
break;
}
// Turn "dict.Func" into a partial for "Func" bound to "dict".
// Don't do this when "Func" is already a partial that was bound
// explicitly (pt_auto is FALSE).
if (selfdict != NULL
&& (rettv->v_type == VAR_FUNC
|| (rettv->v_type == VAR_PARTIAL
&& (rettv->vval.v_partial->pt_auto
|| rettv->vval.v_partial->pt_dict == NULL))))
selfdict = make_partial(selfdict, rettv);
dict_unref(selfdict);
return ret;
}
/*
* Make a copy of an item.
* Lists and Dictionaries are also copied. A deep copy if "deep" is set.
* "top" is TRUE for the toplevel of copy().
* For deepcopy() "copyID" is zero for a full copy or the ID for when a
* reference to an already copied list/dict can be used.
* Returns FAIL or OK.
*/
int
item_copy(
typval_T *from,
typval_T *to,
int deep,
int top,
int copyID)
{
static int recurse = 0;
int ret = OK;
if (recurse >= DICT_MAXNEST)
{
emsg(_(e_variable_nested_too_deep_for_making_copy));
return FAIL;
}
++recurse;
switch (from->v_type)
{
case VAR_NUMBER:
case VAR_FLOAT:
case VAR_STRING:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_BOOL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
case VAR_INSTR:
copy_tv(from, to);
break;
case VAR_LIST:
to->v_type = VAR_LIST;
to->v_lock = 0;
if (from->vval.v_list == NULL)
to->vval.v_list = NULL;
else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
{
// use the copy made earlier
to->vval.v_list = from->vval.v_list->lv_copylist;
++to->vval.v_list->lv_refcount;
}
else
to->vval.v_list = list_copy(from->vval.v_list,
deep, top, copyID);
if (to->vval.v_list == NULL)
ret = FAIL;
break;
case VAR_BLOB:
ret = blob_copy(from->vval.v_blob, to);
break;
case VAR_DICT:
to->v_type = VAR_DICT;
to->v_lock = 0;
if (from->vval.v_dict == NULL)
to->vval.v_dict = NULL;
else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
{
// use the copy made earlier
to->vval.v_dict = from->vval.v_dict->dv_copydict;
++to->vval.v_dict->dv_refcount;
}
else
to->vval.v_dict = dict_copy(from->vval.v_dict,
deep, top, copyID);
if (to->vval.v_dict == NULL)
ret = FAIL;
break;
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
internal_error_no_abort("item_copy(UNKNOWN)");
ret = FAIL;
}
--recurse;
return ret;
}
void
echo_one(typval_T *rettv, int with_space, int *atstart, int *needclr)
{
char_u *tofree;
char_u numbuf[NUMBUFLEN];
char_u *p = echo_string(rettv, &tofree, numbuf, get_copyID());
if (*atstart)
{
*atstart = FALSE;
// Call msg_start() after eval1(), evaluating the expression
// may cause a message to appear.
if (with_space)
{
// Mark the saved text as finishing the line, so that what
// follows is displayed on a new line when scrolling back
// at the more prompt.
msg_sb_eol();
msg_start();
}
}
else if (with_space)
msg_puts_attr(" ", echo_attr);
if (p != NULL)
for ( ; *p != NUL && !got_int; ++p)
{
if (*p == '\n' || *p == '\r' || *p == TAB)
{
if (*p != TAB && *needclr)
{
// remove any text still there from the command
msg_clr_eos();
*needclr = FALSE;
}
msg_putchar_attr(*p, echo_attr);
}
else
{
if (has_mbyte)
{
int i = (*mb_ptr2len)(p);
(void)msg_outtrans_len_attr(p, i, echo_attr);
p += i - 1;
}
else
(void)msg_outtrans_len_attr(p, 1, echo_attr);
}
}
vim_free(tofree);
}
/*
* ":echo expr1 ..." print each argument separated with a space, add a
* newline at the end.
* ":echon expr1 ..." print each argument plain.
*/
void
ex_echo(exarg_T *eap)
{
char_u *arg = eap->arg;
typval_T rettv;
char_u *arg_start;
int needclr = TRUE;
int atstart = TRUE;
int did_emsg_before = did_emsg;
int called_emsg_before = called_emsg;
evalarg_T evalarg;
fill_evalarg_from_eap(&evalarg, eap, eap->skip);
if (eap->skip)
++emsg_skip;
while ((!ends_excmd2(eap->cmd, arg) || *arg == '"') && !got_int)
{
// If eval1() causes an error message the text from the command may
// still need to be cleared. E.g., "echo 22,44".
need_clr_eos = needclr;
arg_start = arg;
if (eval1(&arg, &rettv, &evalarg) == FAIL)
{
/*
* Report the invalid expression unless the expression evaluation
* has been cancelled due to an aborting error, an interrupt, or an
* exception.
*/
if (!aborting() && did_emsg == did_emsg_before
&& called_emsg == called_emsg_before)
semsg(_(e_invalid_expression_str), arg_start);
need_clr_eos = FALSE;
break;
}
need_clr_eos = FALSE;
if (!eap->skip)
{
if (rettv.v_type == VAR_VOID)
{
semsg(_(e_expression_does_not_result_in_value_str), arg_start);
break;
}
echo_one(&rettv, eap->cmdidx == CMD_echo, &atstart, &needclr);
}
clear_tv(&rettv);
arg = skipwhite(arg);
}
set_nextcmd(eap, arg);
clear_evalarg(&evalarg, eap);
if (eap->skip)
--emsg_skip;
else
{
// remove text that may still be there from the command
if (needclr)
msg_clr_eos();
if (eap->cmdidx == CMD_echo)
msg_end();
}
}
/*
* ":echohl {name}".
*/
void
ex_echohl(exarg_T *eap)
{
echo_attr = syn_name2attr(eap->arg);
}
/*
* Returns the :echo attribute
*/
int
get_echo_attr(void)
{
return echo_attr;
}
/*
* ":execute expr1 ..." execute the result of an expression.
* ":echomsg expr1 ..." Print a message
* ":echoerr expr1 ..." Print an error
* ":echoconsole expr1 ..." Print a message on stdout
* Each gets spaces around each argument and a newline at the end for
* echo commands
*/
void
ex_execute(exarg_T *eap)
{
char_u *arg = eap->arg;
typval_T rettv;
int ret = OK;
char_u *p;
garray_T ga;
int len;
long start_lnum = SOURCING_LNUM;
ga_init2(&ga, 1, 80);
if (eap->skip)
++emsg_skip;
while (!ends_excmd2(eap->cmd, arg) || *arg == '"')
{
ret = eval1_emsg(&arg, &rettv, eap);
if (ret == FAIL)
break;
if (!eap->skip)
{
char_u buf[NUMBUFLEN];
if (eap->cmdidx == CMD_execute)
{
if (rettv.v_type == VAR_CHANNEL || rettv.v_type == VAR_JOB)
{
semsg(_(e_using_invalid_value_as_string_str),
vartype_name(rettv.v_type));
p = NULL;
}
else
p = tv_get_string_buf(&rettv, buf);
}
else
p = tv_stringify(&rettv, buf);
if (p == NULL)
{
clear_tv(&rettv);
ret = FAIL;
break;
}
len = (int)STRLEN(p);
if (ga_grow(&ga, len + 2) == FAIL)
{
clear_tv(&rettv);
ret = FAIL;
break;
}
if (ga.ga_len)
((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
ga.ga_len += len;
}
clear_tv(&rettv);
arg = skipwhite(arg);
}
if (ret != FAIL && ga.ga_data != NULL)
{
// use the first line of continuation lines for messages
SOURCING_LNUM = start_lnum;
if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr)
{
// Mark the already saved text as finishing the line, so that what
// follows is displayed on a new line when scrolling back at the
// more prompt.
msg_sb_eol();
}
if (eap->cmdidx == CMD_echomsg)
{
msg_attr(ga.ga_data, echo_attr);
out_flush();
}
else if (eap->cmdidx == CMD_echoconsole)
{
ui_write(ga.ga_data, (int)STRLEN(ga.ga_data), TRUE);
ui_write((char_u *)"\r\n", 2, TRUE);
}
else if (eap->cmdidx == CMD_echoerr)
{
int save_did_emsg = did_emsg;
// We don't want to abort following commands, restore did_emsg.
emsg(ga.ga_data);
if (!force_abort)
did_emsg = save_did_emsg;
}
else if (eap->cmdidx == CMD_execute)
{
int save_sticky_cmdmod_flags = sticky_cmdmod_flags;
// "legacy exe cmd" and "vim9cmd exe cmd" applies to "cmd".
sticky_cmdmod_flags = cmdmod.cmod_flags
& (CMOD_LEGACY | CMOD_VIM9CMD);
do_cmdline((char_u *)ga.ga_data,
eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
sticky_cmdmod_flags = save_sticky_cmdmod_flags;
}
}
ga_clear(&ga);
if (eap->skip)
--emsg_skip;
set_nextcmd(eap, arg);
}
/*
* Skip over the name of an option: "&option", "&g:option" or "&l:option".
* "arg" points to the "&" or '+' when called, to "option" when returning.
* Returns NULL when no option name found. Otherwise pointer to the char
* after the option name.
*/
char_u *
find_option_end(char_u **arg, int *scope)
{
char_u *p = *arg;
++p;
if (*p == 'g' && p[1] == ':')
{
*scope = OPT_GLOBAL;
p += 2;
}
else if (*p == 'l' && p[1] == ':')
{
*scope = OPT_LOCAL;
p += 2;
}
else
*scope = 0;
if (!ASCII_ISALPHA(*p))
return NULL;
*arg = p;
if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
p += 4; // termcap option
else
while (ASCII_ISALPHA(*p))
++p;
return p;
}
/*
* Display script name where an item was last set.
* Should only be invoked when 'verbose' is non-zero.
*/
void
last_set_msg(sctx_T script_ctx)
{
char_u *p;
if (script_ctx.sc_sid != 0)
{
p = home_replace_save(NULL, get_scriptname(script_ctx.sc_sid));
if (p != NULL)
{
verbose_enter();
msg_puts(_("\n\tLast set from "));
msg_puts((char *)p);
if (script_ctx.sc_lnum > 0)
{
msg_puts(_(line_msg));
msg_outnum((long)script_ctx.sc_lnum);
}
verbose_leave();
vim_free(p);
}
}
}
#endif // FEAT_EVAL
/*
* Perform a substitution on "str" with pattern "pat" and substitute "sub".
* When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL.
* "flags" can be "g" to do a global substitute.
* Returns an allocated string, NULL for error.
*/
char_u *
do_string_sub(
char_u *str,
char_u *pat,
char_u *sub,
typval_T *expr,
char_u *flags)
{
int sublen;
regmatch_T regmatch;
int i;
int do_all;
char_u *tail;
char_u *end;
garray_T ga;
char_u *ret;
char_u *save_cpo;
char_u *zero_width = NULL;
// Make 'cpoptions' empty, so that the 'l' flag doesn't work here
save_cpo = p_cpo;
p_cpo = empty_option;
ga_init2(&ga, 1, 200);
do_all = (flags[0] == 'g');
regmatch.rm_ic = p_ic;
regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
if (regmatch.regprog != NULL)
{
tail = str;
end = str + STRLEN(str);
while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
{
// Skip empty match except for first match.
if (regmatch.startp[0] == regmatch.endp[0])
{
if (zero_width == regmatch.startp[0])
{
// avoid getting stuck on a match with an empty string
i = mb_ptr2len(tail);
mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail,
(size_t)i);
ga.ga_len += i;
tail += i;
continue;
}
zero_width = regmatch.startp[0];
}
/*
* Get some space for a temporary buffer to do the substitution
* into. It will contain:
* - The text up to where the match is.
* - The substituted text.
* - The text after the match.
*/
sublen = vim_regsub(&regmatch, sub, expr, tail, FALSE, TRUE, FALSE);
if (ga_grow(&ga, (int)((end - tail) + sublen -
(regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
{
ga_clear(&ga);
break;
}
// copy the text up to where the match is
i = (int)(regmatch.startp[0] - tail);
mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
// add the substituted text
(void)vim_regsub(&regmatch, sub, expr, (char_u *)ga.ga_data
+ ga.ga_len + i, TRUE, TRUE, FALSE);
ga.ga_len += i + sublen - 1;
tail = regmatch.endp[0];
if (*tail == NUL)
break;
if (!do_all)
break;
}
if (ga.ga_data != NULL)
STRCPY((char *)ga.ga_data + ga.ga_len, tail);
vim_regfree(regmatch.regprog);
}
ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
ga_clear(&ga);
if (p_cpo == empty_option)
p_cpo = save_cpo;
else
{
// Darn, evaluating {sub} expression or {expr} changed the value.
// If it's still empty it was changed and restored, need to restore in
// the complicated way.
if (*p_cpo == NUL)
set_option_value((char_u *)"cpo", 0L, save_cpo, 0);
free_string_option(save_cpo);
}
return ret;
}
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