MEGA
} else if (v < MEGA * 10) {
pv = (double)v / MEGA;
} else if (v < MEGA * 100) {
pv = (double)v / MEGA;
} else if (v < MEGA * 1000) {
pv = (double)v / MEGA;
#define GIGA ((uint64_t)(MEGA * 1000))