Class: ICU::NumberFormatting::CurrencyFormatter

Inherits:
BaseFormatter show all
Defined in:
lib/ffi-icu/number_formatting.rb

Instance Method Summary collapse

Methods inherited from BaseFormatter

#set_attributes

Constructor Details

#initialize(locale, style = :default) ⇒ CurrencyFormatter

Returns a new instance of CurrencyFormatter.



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# File 'lib/ffi-icu/number_formatting.rb', line 112

def initialize(locale, style = :default)
  super()

  if ['iso', 'plural'].include?((style || '').to_s)
    if Lib.version.to_a.first >= 53
      style = :"currency_#{style}"
    else
      raise("Your version of ICU (#{Lib.version.to_a.join('.')}) does not support " \
            "#{style} currency formatting (supported only in version >= 53)")
    end
  elsif style && style.to_sym != :default
    raise('The ffi-icu ruby gem does not support: ' \
          "#{default} currency formatting (only :default, :iso, and :plural)")
  else
    style = :currency
  end
  @f = make_formatter(style, locale)
end

Instance Method Details

#format(number, currency) ⇒ Object 



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# File 'lib/ffi-icu/number_formatting.rb', line 131

def format(number, currency)
  needed_length = 0
  out_ptr = UCharPointer.new(needed_length)

  retried = false

  begin
    Lib.check_error do |error|
      needed_length = Lib.unum_format_currency(@f, number, UCharPointer.from_string(currency, 4), out_ptr,
                                               needed_length, nil, error)
    end
    out_ptr.string
  rescue BufferOverflowError
    raise(BufferOverflowError, "needed: #{needed_length}") if retried

    out_ptr = out_ptr.resized_to(needed_length)
    retried = true
    retry
  end
end