ref: 6eb7e8e2b120c1511bdcf90e5b1d4e76383c7daf dir: /sys/src/libc/port/abs.c/
#include <u.h> #include <libc.h> int abs(int a) { if(a < 0) return -a; return a; } long labs(long a) { if(a < 0) return -a; return a; }