Module: ICU::Calendar::Library

Extended by:
FFI::Library
Defined in:
lib/icu/calendar/library.rb,
lib/icu/calendar/library/constants.rb,
lib/icu/calendar/library/error_code.rb,
lib/icu/calendar/library/version_info.rb

Defined Under Namespace

Classes: ErrorCode, VersionInfo

Constant Summary collapse

U_BUFFER_OVERFLOW_ERROR = 
15
U_MAX_VERSION_LENGTH = 
4
U_MAX_VERSION_STRING_LENGTH = 
20
U_ZERO_ERROR = 
0

Class Method Summary collapse

Class Method Details

.assert_success ⇒ Object 



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# File 'lib/icu/calendar/library.rb', line 36

def assert_success
  ErrorCode.new do |status|
    result = yield status
    raise RuntimeError, status.to_s unless status.success?
    return result
  end
end

.read_into_wchar_buffer(length) ⇒ Object 



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# File 'lib/icu/calendar/library.rb', line 44

def read_into_wchar_buffer(length)
  ErrorCode.new do |status|
    for _ in 1..2
      FFI::Buffer.new(:uint16, length, false) do |buffer|
        length = yield buffer, status
        return buffer.read_array_of_uint16(length).pack('U*') if status.success?
        raise RuntimeError, status.to_s unless status.buffer_overflow?
        status.clear
      end
    end
    raise RuntimeError, "#{status}: Needed #{length}"
  end
end

.read_wchar_enumeration(open) ⇒ Object 



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# File 'lib/icu/calendar/library.rb', line 58

def read_wchar_enumeration(open)
  return enum_for(:read_wchar_enumeration, open) unless block_given?

  Library::ErrorCode.new do |status|
    enumeration = open.call(status)
    raise RuntimeError, status.to_s unless status.success?

    begin
      FFI::MemoryPointer.new(:int32) do |length|
        loop do
          pointer = Library.uenum_unext(enumeration, length, status)
          raise RuntimeError, status.to_s unless status.success?
          break if pointer.null?
          yield pointer.read_array_of_uint16(length.read_int32).pack('U*')
        end
      end
    ensure
      Library.uenum_close(enumeration)
    end
  end
end

.version ⇒ Object 



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# File 'lib/icu/calendar/library.rb', line 80

def version
  @version ||= VersionInfo.new.tap { |version| u_getVersion(version) }
end

.wchar_buffer_from_string(string, &block) ⇒ Object 



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# File 'lib/icu/calendar/library.rb', line 84

def wchar_buffer_from_string(string, &block)
  codepoints = string.encode('UTF-8').unpack('U*') << 0
  FFI::Buffer.new(:uint16, codepoints.length, false) do |buffer|
    buffer.write_array_of_uint16(codepoints)
    return yield buffer
  end
end