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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
#[cfg(feature = "block")]
use alloc::vec::Vec;
use core::ffi::c_void;
use core::fmt;
use core::ops::Index;
use core::panic::{RefUnwindSafe, UnwindSafe};
use core::slice::{self, SliceIndex};
use super::{NSCopying, NSMutableCopying, NSMutableData, NSObject};
use crate::rc::{DefaultId, Id, Shared};
use crate::runtime::{Class, Object};
use crate::{extern_class, extern_methods, msg_send_id, ClassType};
extern_class!(
#[derive(PartialEq, Eq, Hash)]
pub struct NSData;
unsafe impl ClassType for NSData {
type Super = NSObject;
}
);
unsafe impl Sync for NSData {}
unsafe impl Send for NSData {}
impl UnwindSafe for NSData {}
impl RefUnwindSafe for NSData {}
extern_methods!(
unsafe impl NSData {
pub fn new() -> Id<Self, Shared> {
unsafe { msg_send_id![Self::class(), new] }
}
pub fn with_bytes(bytes: &[u8]) -> Id<Self, Shared> {
unsafe { Id::cast(with_slice(Self::class(), bytes)) }
}
#[cfg(feature = "block")]
pub fn from_vec(bytes: Vec<u8>) -> Id<Self, Shared> {
#[cfg(feature = "gnustep-1-7")]
let cls = crate::class!(NSDataWithDeallocatorBlock);
#[cfg(not(feature = "gnustep-1-7"))]
let cls = Self::class();
unsafe { Id::cast(with_vec(cls, bytes)) }
}
}
unsafe impl NSData {
#[sel(length)]
#[doc(alias = "length")]
pub fn len(&self) -> usize;
pub fn is_empty(&self) -> bool {
self.len() == 0
}
#[sel(bytes)]
fn bytes_raw(&self) -> *const c_void;
pub fn bytes(&self) -> &[u8] {
let ptr = self.bytes_raw();
let ptr: *const u8 = ptr.cast();
if ptr.is_null() {
&[]
} else {
unsafe { slice::from_raw_parts(ptr, self.len()) }
}
}
}
);
unsafe impl NSCopying for NSData {
type Ownership = Shared;
type Output = NSData;
}
unsafe impl NSMutableCopying for NSData {
type Output = NSMutableData;
}
impl alloc::borrow::ToOwned for NSData {
type Owned = Id<NSData, Shared>;
fn to_owned(&self) -> Self::Owned {
self.copy()
}
}
impl AsRef<[u8]> for NSData {
fn as_ref(&self) -> &[u8] {
self.bytes()
}
}
impl<I: SliceIndex<[u8]>> Index<I> for NSData {
type Output = I::Output;
#[inline]
fn index(&self, index: I) -> &Self::Output {
Index::index(self.bytes(), index)
}
}
impl DefaultId for NSData {
type Ownership = Shared;
#[inline]
fn default_id() -> Id<Self, Self::Ownership> {
Self::new()
}
}
impl fmt::Debug for NSData {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Debug::fmt(self.bytes(), f)
}
}
impl<'a> IntoIterator for &'a NSData {
type Item = &'a u8;
type IntoIter = core::slice::Iter<'a, u8>;
fn into_iter(self) -> Self::IntoIter {
self.bytes().iter()
}
}
pub(crate) unsafe fn with_slice(cls: &Class, bytes: &[u8]) -> Id<Object, Shared> {
let bytes_ptr: *const c_void = bytes.as_ptr().cast();
unsafe {
msg_send_id![
msg_send_id![cls, alloc],
initWithBytes: bytes_ptr,
length: bytes.len(),
]
}
}
#[cfg(feature = "block")]
pub(crate) unsafe fn with_vec(cls: &Class, bytes: Vec<u8>) -> Id<Object, Shared> {
use core::mem::ManuallyDrop;
use block2::{Block, ConcreteBlock};
let capacity = bytes.capacity();
let dealloc = ConcreteBlock::new(move |bytes: *mut c_void, len: usize| unsafe {
let _ = Vec::<u8>::from_raw_parts(bytes.cast(), len, capacity);
});
let dealloc = dealloc.copy();
let dealloc: &Block<(*mut c_void, usize), ()> = &dealloc;
let mut bytes = ManuallyDrop::new(bytes);
let bytes_ptr: *mut c_void = bytes.as_mut_ptr().cast();
unsafe {
msg_send_id![
msg_send_id![cls, alloc],
initWithBytesNoCopy: bytes_ptr,
length: bytes.len(),
deallocator: dealloc,
]
}
}
#[cfg(test)]
mod tests {
use super::*;
use alloc::format;
#[cfg(feature = "block")]
use alloc::vec;
#[test]
fn test_bytes() {
let bytes = [3, 7, 16, 52, 112, 19];
let data = NSData::with_bytes(&bytes);
assert_eq!(data.len(), bytes.len());
assert_eq!(data.bytes(), bytes);
}
#[test]
fn test_no_bytes() {
let data = NSData::new();
assert!(Some(data.bytes()).is_some());
}
#[cfg(feature = "block")]
#[test]
fn test_from_vec() {
let bytes = vec![3, 7, 16];
let bytes_ptr = bytes.as_ptr();
let data = NSData::from_vec(bytes);
assert_eq!(data.bytes().as_ptr(), bytes_ptr);
}
#[test]
fn test_debug() {
let bytes = [3, 7, 16, 52, 112, 19];
let data = NSData::with_bytes(&bytes);
assert_eq!(format!("{:?}", data), "[3, 7, 16, 52, 112, 19]");
}
}