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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
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
[ 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
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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