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Versions: 16
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Contents
# frozen_string_literal: true
module RubyPgExtras
class SizeParser
def self.to_i(arg)
value = to_i_si(arg) || to_i_binary(arg) || to_i_digits(arg)
raise ArgumentError, "Unparseable size: #{arg}" if value.nil?
value
end
def self.regexp_for_units(units)
/\A(-?\d+)\s?(#{units.join("|")})\z/i
end
SI_UNITS = %w[bytes kB MB GB TB PB EB ZB YB].map(&:downcase).freeze
SI_REGEXP = regexp_for_units(SI_UNITS)
def self.to_i_si(arg)
to_i_for_units(arg, SI_REGEXP, SI_UNITS, 1000)
end
BINARY_UNITS = %w[bytes KiB MiB GiB TiB PiB EiB ZiB YiB].map(&:downcase).freeze
BINARY_REGEXP = regexp_for_units(BINARY_UNITS)
def self.to_i_binary(arg)
to_i_for_units(arg, BINARY_REGEXP, BINARY_UNITS, 1024)
end
def self.to_i_for_units(arg, regexp, units, multiplier)
match_data = regexp.match(arg)
return nil unless match_data
exponent = units.index(match_data[2].downcase).to_i
match_data[1].to_i * multiplier ** exponent
end
DIGITS_ONLY_REGEXP = /\A(-?\d+)\z/.freeze
def self.to_i_digits(arg)
DIGITS_ONLY_REGEXP.match?(arg) ? arg.to_i : nil
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems