31 lines
1.2 KiB
Dart
31 lines
1.2 KiB
Dart
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extension BytesFormat on num {
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/// method returns a human readable string representing a file size
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/// size can be passed as number or as string
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/// the optional parameter 'round' specifies the number of numbers after comma/point (default is 2)
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/// the optional boolean parameter 'useBase1024' specifies if we should count in 1024's (true) or 1000's (false). e.g. 1KB = 1024B (default is true)
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String bytesFormat({int round = 2, bool useBase1024 = true}) {
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const List<String> affixes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
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num divider = useBase1024 ? 1024 : 1000;
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num size = this;
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num runningDivider = divider;
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num runningPreviousDivider = 0;
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int affix = 0;
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while (size >= runningDivider && affix < affixes.length - 1) {
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runningPreviousDivider = runningDivider;
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runningDivider *= divider;
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affix++;
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}
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String result =
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(runningPreviousDivider == 0 ? size : size / runningPreviousDivider).toStringAsFixed(round);
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//Check if the result ends with .00000 (depending on how many decimals) and remove it if found.
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if (result.endsWith("0" * round)) result = result.substring(0, result.length - round - 1);
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return "$result ${affixes[affix]}";
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}
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}
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