Class: HumanSize

Inherits:
Object
  • Object
show all
Defined in:
lib/human_size.rb,
lib/human_size/version.rb

Overview

——————————————————————————– # Description # ——————————————————————————– # This is the main class and the one that does all the real work and is called by # the static access class and the direct method access above. # ——————————————————————————– #

Constant Summary collapse

VERSION = 
'1.0.0'.freeze

Instance Method Summary collapse

Instance Method Details

#human_size(bytes, a_kilobyte_is_1024_bytes = true) ⇒ Object 



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# File 'lib/human_size.rb', line 38

def human_size(bytes, a_kilobyte_is_1024_bytes = true)
    suffixes_table = {
        # Unit prefixes used for SI file sizes.
        'SI' => ['B', 'KB', 'MB', 'GB', 'TB', 'Pb', 'EB', 'ZB', 'YB'],
        # Unit prefixes used for binary file sizes.
        'BINARY' => ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'Pib', 'EiB', 'ZiB', 'YiB']
    }

    return 'unknown' if bytes < 0
    return '0.0 B' if bytes.zero?

    units = if a_kilobyte_is_1024_bytes
                suffixes_table['BINARY']
            else
                suffixes_table['SI']
            end

    multiple = if a_kilobyte_is_1024_bytes
                   1024
               else
                   1000
               end

    exp = (Math.log(bytes) / Math.log(multiple)).to_i
    exp = units.length if exp > units.length

    # rubocop:disable Layout/SpaceAroundOperators
    format('%<bytes>.1f %<unit>s', bytes: bytes.to_f / multiple ** exp, unit: units[exp])
    # rubocop:enable Layout/SpaceAroundOperators
end