ref: 7faa0a6225f7f6d3b4a5b9c0b0ce919a8d7056a2
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;
}