1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend %s -enable-experimental-feature Extern -enable-experimental-feature Embedded -c -o %t/main.o
// RUN: %target-clang -x c -c %S/Inputs/print.c -o %t/print.o
// RUN: %target-clang %t/main.o %t/print.o -o %t/a.out -dead_strip
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
// REQUIRES: swift_feature_Embedded
// REQUIRES: swift_feature_Extern
@_extern(c, "putchar")
@discardableResult
func putchar(_: CInt) -> CInt
public func print(_ s: StaticString, terminator: StaticString = "\n") {
var p = s.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
p = terminator.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
}
@_silgen_name("print_long")
func print_long(_: Int)
public func print(_ n: Int, terminator: StaticString = "\n") {
print_long(n)
print("", terminator: terminator)
}
func print(_ array: [Int]) {
print("[", terminator: "")
for i in 0 ..< array.count {
print_long(array[i])
if i != array.count - 1 { print(", ", terminator: "") }
}
print("]")
}
@_silgen_name("memcmp")
func memcmp(_: UnsafeRawPointer, _: UnsafeRawPointer, _: Int) -> CInt
@_silgen_name("memcpy")
func memcpy(_: UnsafeMutableRawPointer, _: UnsafeRawPointer, _: Int) -> UnsafeRawPointer
func test() {
print("Calling memcmp")
// CHECK: Calling memcmp
// const arrays
print(Int(memcmp([1, 2, 3], [1, 2, 3], MemoryLayout<Int>.size * 3)))
print(Int(memcmp([1, 2, 3], [1, 2, 4], MemoryLayout<Int>.size * 3)))
// CHECK-NEXT: 0
// CHECK-NEXT: 1
let a1 = [1, 2, 3]
let a2 = [1, 2, 4]
print(Int(memcmp(a1, a2, MemoryLayout<Int>.size * 3)))
// CHECK-NEXT: 1
// mutable array
var arr = [1, 2, 3, 4, 5]
var int42 = 42
memcpy(&arr, &int42, MemoryLayout<Int>.size)
print(arr)
// CHECK-NEXT: [42, 2, 3, 4, 5]
}
test()
|
