objc_runtime_darwin_test.go RawHistoryFolder

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
3
4package objc_test
5
6import (
7	"fmt"
8	"unsafe"
9
10	"github.com/ebitengine/purego"
11	"github.com/ebitengine/purego/objc"
12)
13
14func ExampleAllocateClassPair() {
15	var class = objc.AllocateClassPair(objc.GetClass("NSObject"), "FooObject", 0)
16	class.AddMethod(objc.RegisterName("run"), objc.NewIMP(func(self objc.ID, _cmd objc.SEL) {
17		fmt.Println("Hello World!")
18	}), "v@:")
19	class.Register()
20
21	var fooObject = objc.ID(class).Send(objc.RegisterName("new"))
22	fooObject.Send(objc.RegisterName("run"))
23	// Output: Hello World!
24}
25
26func ExampleClass_AddIvar() {
27	var class = objc.AllocateClassPair(objc.GetClass("NSObject"), "BarObject", 0)
28	class.AddIvar("bar", int(0), "q")
29	var barOffset = class.InstanceVariable("bar").Offset()
30	class.AddMethod(objc.RegisterName("bar"), objc.NewIMP(func(self objc.ID, _cmd objc.SEL) int {
31		return *(*int)(unsafe.Pointer(uintptr(unsafe.Pointer(self)) + barOffset))
32	}), "q@:")
33	class.AddMethod(objc.RegisterName("setBar:"), objc.NewIMP(func(self objc.ID, _cmd objc.SEL, bar int) {
34		*(*int)(unsafe.Pointer(uintptr(unsafe.Pointer(self)) + barOffset)) = bar
35	}), "v@:q")
36	class.Register()
37
38	var barObject = objc.ID(class).Send(objc.RegisterName("new"))
39	barObject.Send(objc.RegisterName("setBar:"), 123)
40	var bar = int(barObject.Send(objc.RegisterName("bar")))
41	fmt.Println(bar)
42	// Output: 123
43}
44
45func ExampleIMP() {
46	imp := objc.NewIMP(func(self objc.ID, _cmd objc.SEL, a3, a4, a5, a6, a7, a8, a9 int) {
47		fmt.Println("IMP:", self, _cmd, a3, a4, a5, a6, a7, a8, a9)
48	})
49
50	purego.SyscallN(uintptr(imp), 105, 567, 9, 2, 3, ^uintptr(4), 4, 8, 9)
51
52	// Output: IMP: 105 567 9 2 3 -5 4 8 9
53}
54
55func ExampleID_SendSuper() {
56	super := objc.AllocateClassPair(objc.GetClass("NSObject"), "SuperObject", 0)
57	super.AddMethod(objc.RegisterName("doSomething"), objc.NewIMP(func(self objc.ID, _cmd objc.SEL) {
58		fmt.Println("In Super!")
59	}), "v@:")
60	super.Register()
61
62	child := objc.AllocateClassPair(super, "ChildObject", 0)
63	child.AddMethod(objc.RegisterName("doSomething"), objc.NewIMP(func(self objc.ID, _cmd objc.SEL) {
64		fmt.Println("In Child")
65		self.SendSuper(_cmd)
66	}), "v@:")
67	child.Register()
68
69	objc.ID(child).Send(objc.RegisterName("new")).Send(objc.RegisterName("doSomething"))
70
71	// Output: In Child
72	// In Super!
73}