busybox/libbb/last_char_is.c
Denys Vlasenko d21a63f9fc libbb: code shrink in last_char_is()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-30 08:33:02 +02:00

25 lines
560 B
C

/* vi: set sw=4 ts=4: */
/*
* busybox library eXtended function
*
* Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
/* Find out if the last character of a string matches the one given */
char* FAST_FUNC last_char_is(const char *s, int c)
{
if (s) {
size_t sz = strlen(s);
/* Don't underrun the buffer if the string length is 0 */
if (sz != 0) {
s += sz - 1;
if ((unsigned char)*s == c)
return (char*)s;
}
}
return NULL;
}