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# frozen_string_literal: true
begin
require_relative 'helper'
rescue LoadError
end
module Fiddle
class TestFunc < TestCase
def test_random
f = Function.new(@libc['srand'], [-TYPE_LONG], TYPE_VOID)
assert_nil f.call(10)
end
def test_sinf
begin
f = Function.new(@libm['sinf'], [TYPE_FLOAT], TYPE_FLOAT)
rescue Fiddle::DLError
skip "libm may not have sinf()"
end
assert_in_delta 1.0, f.call(90 * Math::PI / 180), 0.0001
end
def test_sin
f = Function.new(@libm['sin'], [TYPE_DOUBLE], TYPE_DOUBLE)
assert_in_delta 1.0, f.call(90 * Math::PI / 180), 0.0001
end
def test_string
stress, GC.stress = GC.stress, true
f = Function.new(@libc['strcpy'], [TYPE_VOIDP, TYPE_VOIDP], TYPE_VOIDP)
buff = +"000"
str = f.call(buff, "123")
assert_equal("123", buff)
assert_equal("123", str.to_s)
ensure
GC.stress = stress
end
def test_isdigit
f = Function.new(@libc['isdigit'], [TYPE_INT], TYPE_INT)
r1 = f.call(?1.ord)
r2 = f.call(?2.ord)
rr = f.call(?r.ord)
assert_operator r1, :>, 0
assert_operator r2, :>, 0
assert_equal 0, rr
end
def test_atof
f = Function.new(@libc['atof'], [TYPE_VOIDP], TYPE_DOUBLE)
r = f.call("12.34")
assert_includes(12.00..13.00, r)
end
def test_strtod
f = Function.new(@libc['strtod'], [TYPE_VOIDP, TYPE_VOIDP], TYPE_DOUBLE)
buff1 = Pointer["12.34"]
buff2 = buff1 + 4
r = f.call(buff1, - buff2)
assert_in_delta(12.34, r, 0.001)
end
def test_qsort1
cb = Class.new(Closure) {
def call(x, y)
Pointer.new(x)[0] <=> Pointer.new(y)[0]
end
}.new(TYPE_INT, [TYPE_VOIDP, TYPE_VOIDP])
qsort = Function.new(@libc['qsort'],
[TYPE_VOIDP, TYPE_SIZE_T, TYPE_SIZE_T, TYPE_VOIDP],
TYPE_VOID)
buff = "9341"
qsort.call(buff, buff.size, 1, cb)
assert_equal("1349", buff)
bug4929 = '[ruby-core:37395]'
buff = "9341"
EnvUtil.under_gc_stress {qsort.call(buff, buff.size, 1, cb)}
assert_equal("1349", buff, bug4929)
end
def test_snprintf
unless Fiddle.const_defined?("TYPE_VARIADIC")
skip "libffi doesn't support variadic arguments"
end
if Fiddle::WINDOWS
snprintf_name = "_snprintf"
else
snprintf_name = "snprintf"
end
begin
snprintf_pointer = @libc[snprintf_name]
rescue Fiddle::DLError
skip "Can't find #{snprintf_name}: #{$!.message}"
end
snprintf = Function.new(snprintf_pointer,
[
:voidp,
:size_t,
:const_string,
:variadic,
],
:int)
output_buffer = " " * 1024
output = Pointer[output_buffer]
written = snprintf.call(output,
output.size,
"int: %d, string: %.*s, const string: %s\n",
:int, -29,
:int, 4,
:voidp, "Hello",
:const_string, "World")
assert_equal("int: -29, string: Hell, const string: World\n",
output_buffer[0, written])
string_like_class = Class.new do
def initialize(string)
@string = string
end
def to_str
@string
end
end
written = snprintf.call(output,
output.size,
"string: %.*s, const string: %s, uint: %u\n",
:int, 2,
:voidp, "Hello",
:const_string, string_like_class.new("World"),
:int, 29)
assert_equal("string: He, const string: World, uint: 29\n",
output_buffer[0, written])
end
end
end if defined?(Fiddle)
|
