Ventoy/LiveCD/VTOY/ventoy/disksize.c
2020-09-02 19:29:19 +08:00

44 lines
764 B
C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef unsigned long long UINT64;
int GetHumanReadableGBSize(UINT64 SizeBytes)
{
int i;
int Pow2 = 1;
double Delta;
double GB = SizeBytes * 1.0 / 1000 / 1000 / 1000;
for (i = 0; i < 12; i++)
{
if (Pow2 > GB)
{
Delta = (Pow2 - GB) / Pow2;
}
else
{
Delta = (GB - Pow2) / Pow2;
}
if (Delta < 0.05)
{
return Pow2;
}
Pow2 <<= 1;
}
return (int)GB;
}
int main(int argc, char **argv)
{
UINT64 value = strtoul(argv[1], NULL, 10);
printf("%d", GetHumanReadableGBSize(value * 512));
return 0;
}