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Perform some code cleanup

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This commit is contained in:
Justine Tunney 2022-06-23 10:21:07 -07:00
parent 0dd9629562
commit a4601a24d3
63 changed files with 350 additions and 1643 deletions
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8
libc/str/strnlen.c
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@ -18,12 +18,14 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/bits/bits.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/str/str.h"
static noasan size_t strnlen_x64(const char *s, size_t n, size_t i) {
uint64_t w;
for (; i + 8 < n; i += 8) {
w = READ64LE(s + i);
w = *(uint64_t *)(s + i);
if ((w = ~w & (w - 0x0101010101010101) & 0x8080808080808080)) {
i += (unsigned)__builtin_ctzll(w) >> 3;
break;
@ -40,8 +42,9 @@ static noasan size_t strnlen_x64(const char *s, size_t n, size_t i) {
* @return byte length
* @asyncsignalsafe
*/
size_t strnlen(const char *s, size_t n) {
noasan size_t strnlen(const char *s, size_t n) {
size_t i;
if (IsAsan() && n) __asan_verify(s, 1);
for (i = 0; (uintptr_t)(s + i) & 7; ++i) {
if (i == n || !s[i]) return i;
}
@ -50,5 +53,6 @@ size_t strnlen(const char *s, size_t n) {
if (i == n || !s[i]) break;
}
assert(i == n || (i < n && !s[i]));
if (IsAsan()) __asan_verify(s, i);
return i;
}