ref: 0197ce9892214c346e5ceb7ad1e0022a3eedaf1b dir: /sys/src/libc/port/strchr.c/
#include <u.h> #include <libc.h> char* strchr(char *s, int c) { char r; if(c == 0) while(*s++) ; else while((r = *s++) != c) if(r == 0) return 0; return s-1; }