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patch 9.1.0564: id() can be faster

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Problem:  id() can be made faster
Solution: don't use printf(), use clever shift of pointer
          (Ernie Rael)

closes: #15207

Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Ernie Rael
2024-07-11 22:10:45 +02:00
committed by Christian Brabandt
parent 8367884909
commit 0512425891
4 changed files with 20 additions and 12 deletions
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22
src/evalfunc.c
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@ -7537,7 +7537,8 @@ f_hostname(typval_T *argvars UNUSED, typval_T *rettv)
void
f_id(typval_T *argvars, typval_T *rettv)
{
char_u numbuf[NUMBUFLEN];
char numbuf[NUMBUFLEN];
char *p = numbuf;
switch (argvars[0].v_type)
{
@ -7549,17 +7550,22 @@ f_id(typval_T *argvars, typval_T *rettv)
case VAR_BLOB:
// Assume pointer value in typval_T vval union at common location.
if (argvars[0].vval.v_object != NULL)
vim_snprintf((char*)numbuf, sizeof(numbuf), "%p",
(void *)argvars[0].vval.v_object);
else
numbuf[0] = NUL;
break;
{
// "v" gets the address as an integer
uintptr_t v = (uintptr_t)(void *)argvars[0].vval.v_object;
// Build a hex string from the item's address; it is in
// reverse order. Ignore trailing zeros.
for (; p < numbuf + sizeof(uintptr_t) * 2 && v != 0;
++p, v >>= 4)
*p = "0123456789abcdef"[v & 0xf];
}
default:
numbuf[0] = NUL;
break;
}
*p = NUL;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = vim_strsave(numbuf);
rettv->vval.v_string = vim_strsave((char_u *)numbuf);
}
/*