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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"))
describe "Function with variadic arguments" do
module LibTest
extend FFI::Library
ffi_lib TestLibrary::PATH
enum :enum_type1, [:c1, :c2]
enum :enum_type2, [:c3, 42, :c4]
attach_function :pack_varargs, [ :buffer_out, :string, :varargs ], :void
attach_function :pack_varargs2, [ :buffer_out, :enum_type1, :string, :varargs ], :enum_type1
callback :cbVrD, [ ], :double
callback :cbVrI, [:int], :int
callback :cbVrL, [:long], :long
attach_function :testBlockingOpen, [ ], :pointer
attach_function :testBlockingRWva, [ :pointer, :char, :varargs ], :char, :blocking => true
attach_function :testBlockingWRva, [ :pointer, :char, :varargs ], :char, :blocking => true
attach_function :testBlockingClose, [ :pointer ], :void
attach_function :testCallbackVrDva, :testClosureVrDva, [ :double, :varargs ], :double
attach_function :testCallbackVrILva, :testClosureVrILva, [ :int, :long, :varargs ], :long
freeze
end
it "takes enum arguments" do
buf = FFI::Buffer.new :long_long, 2
LibTest.pack_varargs(buf, "ii", :int, :c3, :int, :c4)
expect(buf.get_int64(0)).to eq(42)
expect(buf.get_int64(8)).to eq(43)
end
it "returns symbols for enums" do
buf = FFI::Buffer.new :long_long, 2
expect(LibTest.pack_varargs2(buf, :c1, "ii", :int, :c3, :int, :c4)).to eq(:c2)
end
it "can reveal its return and parameters" do
skip 'this is not yet implemented on JRuby' if RUBY_ENGINE == 'jruby'
skip 'this is not yet implemented on Truffleruby' if RUBY_ENGINE == 'truffleruby'
fun = LibTest.attached_functions[:testBlockingWRva]
expect(fun.param_types).to eq([FFI::Type::POINTER, FFI::Type::CHAR, FFI::Type::VARARGS])
expect(fun.return_type).to eq(FFI::Type::INT8)
end
it 'can wrap a blocking function with varargs' do
handle = LibTest.testBlockingOpen
expect(handle).not_to be_null
begin
thWR = Thread.new { LibTest.testBlockingWRva(handle, 63, :int, 40, :int, 23, :int, 0) }
thRW = Thread.new { LibTest.testBlockingRWva(handle, 64, :int, 40, :int, 24, :int, 0) }
expect(thWR.value).to eq(64)
expect(thRW.value).to eq(63)
ensure
LibTest.testBlockingClose(handle)
end
end
[ 0, 127, -128, -1 ].each do |i|
it "call variadic with (:char (#{i})) argument" do
buf = FFI::Buffer.new :long_long
LibTest.pack_varargs(buf, "c", :char, i)
expect(buf.get_int64(0)).to eq(i)
end
end
[ 0, 0x7f, 0x80, 0xff ].each do |i|
it "call variadic with (:uchar (#{i})) argument" do
buf = FFI::Buffer.new :long_long
LibTest.pack_varargs(buf, "C", :uchar, i)
expect(buf.get_int64(0)).to eq(i)
end
end
[ 0, 1.234567, 9.87654321 ].each do |v|
it "call variadic with (:float (#{v})) argument" do
buf = FFI::Buffer.new :long_long
LibTest.pack_varargs(buf, "f", :float, v.to_f)
expect(buf.get_float64(0)).to eq(v)
end
end
[ 0, 1.234567, 9.87654321 ].each do |v|
it "call variadic with (:double (#{v})) argument" do
buf = FFI::Buffer.new :long_long
LibTest.pack_varargs(buf, "f", :double, v.to_f)
expect(buf.get_float64(0)).to eq(v)
end
end
it "call variadic with callback argument" do
pr = proc { 42.0 }
expect(LibTest.testCallbackVrDva(3.0, :cbVrD, pr)).to be_within(0.0000001).of(45.0)
end
it "can be called as instance method" do
kl = Class.new do
include LibTest
def call
pr = proc { 42.0 }
testCallbackVrDva(3.0, :cbVrD, pr)
end
end
expect(kl.new.call).to be_within(0.0000001).of(45.0)
end
it "call variadic with several callback arguments" do
pr1 = proc { |i| i + 1 }
pr2 = proc { |l| l + 2 }
expect(LibTest.testCallbackVrILva(5, 6, :cbVrI, pr1, :cbVrL, pr2)).to eq(14)
end
it "should be usable with Ractor", :ractor do
res = Ractor.new do
pr = proc { 42.0 }
LibTest.testCallbackVrDva(3.0, :cbVrD, pr)
end.take
expect(res).to be_within(0.0000001).of(45.0)
end
module Varargs
PACK_VALUES = {
'c' => [ 0x12 ],
'C' => [ 0x34 ],
's' => [ 0x5678 ],
'S' => [ 0x9abc ],
'i' => [ 0x7654321f ],
'I' => [ 0xfee1babe ],
'l' => [ 0x1f2e3d4c ],
'L' => [ 0xf7e8d9ca ],
'j' => [ 0x1eafdeadbeefa1b2 ],
'f' => [ 1.23456789 ],
'd' => [ 9.87654321 ]
}
TYPE_MAP = {
'c' => :char, 'C' => :uchar, 's' => :short, 'S' => :ushort,
'i' => :int, 'I' => :uint, 'j' => :long_long, 'J' => :ulong_long,
'l' => :long, 'L' => :ulong, 'f' => :float, 'd' => :double
}
end
def verify(p, off, v)
if v.kind_of?(Float)
expect(p.get_float64(off)).to eq(v)
else
expect(p.get_int64(off)).to eq(v)
end
end
Varargs::PACK_VALUES.keys.each do |t1|
Varargs::PACK_VALUES.keys.each do |t2|
Varargs::PACK_VALUES.keys.each do |t3|
Varargs::PACK_VALUES[t1].each do |v1|
Varargs::PACK_VALUES[t2].each do |v2|
Varargs::PACK_VALUES[t3].each do |v3|
fmt = "#{t1}#{t2}#{t3}"
params = [ Varargs::TYPE_MAP[t1], v1, Varargs::TYPE_MAP[t2], v2, Varargs::TYPE_MAP[t3], v3 ]
it "call(#{fmt}, #{params.join(',')})" do
buf = FFI::Buffer.new :long_long, 3
LibTest.pack_varargs(buf, fmt, *params)
verify(buf, 0, v1)
verify(buf, 8, v2)
verify(buf, 16, v3)
end
end
end
end
end
end
end
end
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