ref: a7a07b2d43529b60a239bbb2c7acabcbdbb812e5
dir: /sys/src/libc/port/strchr.c/
#include <u.h>
#include <libc.h>
char*
strchr(char *s, int c)
{
char c0 = c;
char c1;
if(c == 0) {
while(*s++)
;
return s-1;
}
while(c1 = *s++)
if(c1 == c0)
return s-1;
return 0;
}