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fix spuriously slow check in twoway strstr/memmem cores

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mem0 && mem && ... is redundant since mem can only be nonzero when
mem0 is nonzero.
This commit is contained in:
Rich Felker 2018-11-02 12:01:37 -04:00
parent 1b52863e24
commit 8f5a820d14
2 changed files with 2 additions and 2 deletions
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2
src/string/memmem.c
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@ -100,7 +100,7 @@ static char *twoway_memmem(const unsigned char *h, const unsigned char *z, const
if (BITOP(byteset, h[l-1], &)) {
k = l-shift[h[l-1]];
if (k) {
if (mem0 && mem && k < p) k = l-p;
if (mem && k < p) k = l-p;
h += k;
mem = 0;
continue;

2
src/string/strstr.c
View file

@ -110,7 +110,7 @@ static char *twoway_strstr(const unsigned char *h, const unsigned char *n)
k = l-shift[h[l-1]];
//printf("adv by %zu (on %c) at [%s] (%zu;l=%zu)\n", k, h[l-1], h, shift[h[l-1]], l);
if (k) {
if (mem0 && mem && k < p) k = l-p;
if (mem && k < p) k = l-p;
h += k;
mem = 0;
continue;