ref: e7d670f1558576f5cfdb9f4b3f74bc4cda91e62c 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; }