| # |
| # This file is part of ruby-ffi. |
| # For licensing, see LICENSE.SPECS |
| # |
| |
| require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper")) |
| require 'bigdecimal' |
| |
| describe ":long_double arguments and return values" do |
| module LibTest |
| extend FFI::Library |
| ffi_lib TestLibrary::PATH |
| attach_function :add_f128, [ :long_double, :long_double ], :long_double |
| attach_function :ret_f128, [ :long_double ], :long_double |
| end |
| |
| it "returns first parameter" do |
| expect(LibTest.ret_f128(0.1)).to be_within(0.01).of(0.1) |
| end |
| |
| it "returns first parameter with high precision" do |
| ld = BigDecimal.new("1.234567890123456789") |
| tolerance = BigDecimal.new("0.0000000000000000001") |
| expect(LibTest.ret_f128(ld)).to be_within(tolerance).of(ld) |
| end |
| |
| it "add two long double numbers" do |
| expect(LibTest.add_f128(0.1, 0.2)).to be_within(0.01).of(0.3) |
| end |
| end |