fileSizeWithUnit function
Converts byte length to human readable format.
Implementation
String fileSizeWithUnit(int bytes) {
if (bytes <= 0) return '0 B';
const List<String> suffixes = <String>[
'B',
'KB',
'MB',
'GB',
'TB',
'PB',
'EB',
'ZB',
'YB',
];
final int i = (log(bytes) / log(1024)).floor();
return '${(bytes / pow(1024, i)).toStringAsFixed(0)} ${suffixes[i]}';
}