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#
# 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
LibTest.ret_f128(0.1).should 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")
LibTest.ret_f128(ld).should be_within(tolerance).of(ld)
end
it "add two long double numbers" do
LibTest.add_f128(0.1, 0.2).should be_within(0.01).of(0.3)
end
end
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