The ColdFusion version of the Typescript function to Typescript - Human Readable File Sizes

This stupid simple function takes bytes (as a numeric), and appends 'B', 'KB', 'MB', or 'GB' as appropriate.

// region formatBytes
/**
 * given bytes, return a human readable string
 * @hint         formats bytes into B, KB, MB, GBs
 * @bytes        number of bytes
 * @return string formatted as B, KB, MB, GB
 * @CFLintIgnore ARG_TYPE_ANY
 */
string function formatBytes(required any bytes) {
    if (NOT isValid('numeric', arguments.bytes) OR arguments.bytes LE 0) {
        return '0 B';
    }
    var sizes  = ['B', 'KB', 'MB', 'GB']
    var lScale = floor(log(arguments.bytes) / log(1024));
    var result = arguments.bytes / (1024 ^ lScale);
    if (result LT 10) {
        return '#numberFormat(result, '0.9')# #sizes[lScale + 1]#';
    } else {
        return '#round(result)# #sizes[lScale + 1]#';
    }
}
// endregion

This is included in our common_utils module available in all 5.5 or newer apps (not available in older apps).

Usage

The file size is #formatBytes(101364353)#

Outputs '97 MB'.