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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
// Take a look at the license at the top of the repository in the LICENSE file.

use std::{boxed::Box as Box_, mem, pin::Pin, ptr};

use glib::{prelude::*, translate::*, GString};

use crate::{Cancellable, DataInputStream};

pub trait DataInputStreamExtManual: 'static {
    /// Reads a line from the data input stream. Note that no encoding
    /// checks or conversion is performed; the input is not guaranteed to
    /// be UTF-8, and may in fact have embedded NUL characters.
    ///
    /// If `cancellable` is not [`None`], then the operation can be cancelled by
    /// triggering the cancellable object from another thread. If the operation
    /// was cancelled, the error [`IOErrorEnum::Cancelled`][crate::IOErrorEnum::Cancelled] will be returned.
    /// ## `cancellable`
    /// optional [`Cancellable`][crate::Cancellable] object, [`None`] to ignore.
    ///
    /// # Returns
    ///
    ///
    ///  a NUL terminated byte array with the line that was read in
    ///  (without the newlines). Set `length` to a `gsize` to get the length
    ///  of the read line. On an error, it will return [`None`] and `error`
    ///  will be set. If there's no content to read, it will still return
    ///  [`None`], but `error` won't be set.
    ///
    /// ## `length`
    /// a `gsize` to get the length of the data read in.
    #[doc(alias = "g_data_input_stream_read_line")]
    fn read_line<P: IsA<Cancellable>>(
        &self,
        cancellable: Option<&P>,
    ) -> Result<Vec<u8>, glib::Error>;

    /// The asynchronous version of [`read_line()`][Self::read_line()]. It is
    /// an error to have two outstanding calls to this function.
    ///
    /// When the operation is finished, `callback` will be called. You
    /// can then call `g_data_input_stream_read_line_finish()` to get
    /// the result of the operation.
    /// ## `io_priority`
    /// the [I/O priority][io-priority] of the request
    /// ## `cancellable`
    /// optional [`Cancellable`][crate::Cancellable] object, [`None`] to ignore.
    /// ## `callback`
    /// callback to call when the request is satisfied.
    #[doc(alias = "g_data_input_stream_read_line_async")]
    fn read_line_async<P: IsA<Cancellable>, Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static>(
        &self,
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    );

    fn read_line_future(
        &self,
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Vec<u8>, glib::Error>> + 'static>>;

    /// Reads a UTF-8 encoded line from the data input stream.
    ///
    /// If `cancellable` is not [`None`], then the operation can be cancelled by
    /// triggering the cancellable object from another thread. If the operation
    /// was cancelled, the error [`IOErrorEnum::Cancelled`][crate::IOErrorEnum::Cancelled] will be returned.
    /// ## `cancellable`
    /// optional [`Cancellable`][crate::Cancellable] object, [`None`] to ignore.
    ///
    /// # Returns
    ///
    /// a NUL terminated UTF-8 string
    ///  with the line that was read in (without the newlines). Set
    ///  `length` to a `gsize` to get the length of the read line. On an
    ///  error, it will return [`None`] and `error` will be set. For UTF-8
    ///  conversion errors, the set error domain is `G_CONVERT_ERROR`. If
    ///  there's no content to read, it will still return [`None`], but `error`
    ///  won't be set.
    ///
    /// ## `length`
    /// a `gsize` to get the length of the data read in.
    #[doc(alias = "g_data_input_stream_read_line_utf8")]
    fn read_line_utf8<P: IsA<Cancellable>>(
        &self,
        cancellable: Option<&P>,
    ) -> Result<Option<GString>, glib::Error>;

    fn read_line_utf8_async<
        P: IsA<Cancellable>,
        Q: FnOnce(Result<Option<GString>, glib::Error>) + 'static,
    >(
        &self,
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    );

    fn read_line_utf8_future(
        &self,
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Option<GString>, glib::Error>> + 'static>>;

    /// Reads a string from the data input stream, up to the first
    /// occurrence of any of the stop characters.
    ///
    /// In contrast to `g_data_input_stream_read_until()`, this function
    /// does not consume the stop character. You have to use
    /// [`DataInputStreamExt::read_byte()`][crate::prelude::DataInputStreamExt::read_byte()] to get it before calling
    /// [`read_upto()`][Self::read_upto()] again.
    ///
    /// Note that `stop_chars` may contain '\0' if `stop_chars_len` is
    /// specified.
    ///
    /// The returned string will always be nul-terminated on success.
    /// ## `stop_chars`
    /// characters to terminate the read
    /// ## `stop_chars_len`
    /// length of `stop_chars`. May be -1 if `stop_chars` is
    ///  nul-terminated
    /// ## `cancellable`
    /// optional [`Cancellable`][crate::Cancellable] object, [`None`] to ignore
    ///
    /// # Returns
    ///
    /// a string with the data that was read
    ///  before encountering any of the stop characters. Set `length` to
    ///  a `gsize` to get the length of the string. This function will
    ///  return [`None`] on an error
    ///
    /// ## `length`
    /// a `gsize` to get the length of the data read in
    #[doc(alias = "g_data_input_stream_read_upto")]
    fn read_upto<P: IsA<Cancellable>>(
        &self,
        stop_chars: &[u8],
        cancellable: Option<&P>,
    ) -> Result<Vec<u8>, glib::Error>;

    /// The asynchronous version of [`read_upto()`][Self::read_upto()].
    /// It is an error to have two outstanding calls to this function.
    ///
    /// In contrast to `g_data_input_stream_read_until()`, this function
    /// does not consume the stop character. You have to use
    /// [`DataInputStreamExt::read_byte()`][crate::prelude::DataInputStreamExt::read_byte()] to get it before calling
    /// [`read_upto()`][Self::read_upto()] again.
    ///
    /// Note that `stop_chars` may contain '\0' if `stop_chars_len` is
    /// specified.
    ///
    /// When the operation is finished, `callback` will be called. You
    /// can then call `g_data_input_stream_read_upto_finish()` to get
    /// the result of the operation.
    /// ## `stop_chars`
    /// characters to terminate the read
    /// ## `stop_chars_len`
    /// length of `stop_chars`. May be -1 if `stop_chars` is
    ///  nul-terminated
    /// ## `io_priority`
    /// the [I/O priority][io-priority] of the request
    /// ## `cancellable`
    /// optional [`Cancellable`][crate::Cancellable] object, [`None`] to ignore
    /// ## `callback`
    /// callback to call when the request is satisfied
    #[doc(alias = "g_data_input_stream_read_upto_async")]
    fn read_upto_async<P: IsA<Cancellable>, Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static>(
        &self,
        stop_chars: &[u8],
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    );

    fn read_upto_future(
        &self,
        stop_chars: &[u8],
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Vec<u8>, glib::Error>> + 'static>>;
}

impl<O: IsA<DataInputStream>> DataInputStreamExtManual for O {
    fn read_line<P: IsA<Cancellable>>(
        &self,
        cancellable: Option<&P>,
    ) -> Result<Vec<u8>, glib::Error> {
        unsafe {
            let mut length = mem::MaybeUninit::uninit();
            let mut error = ptr::null_mut();
            let ret = ffi::g_data_input_stream_read_line(
                self.as_ref().to_glib_none().0,
                length.as_mut_ptr(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                &mut error,
            );
            let length = length.assume_init();
            if error.is_null() {
                Ok(FromGlibContainer::from_glib_full_num(ret, length))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    fn read_line_async<P: IsA<Cancellable>, Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static>(
        &self,
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    ) {
        let main_context = glib::MainContext::ref_thread_default();
        let is_main_context_owner = main_context.is_owner();
        let has_acquired_main_context = (!is_main_context_owner)
            .then(|| main_context.acquire().ok())
            .flatten();
        assert!(
            is_main_context_owner || has_acquired_main_context.is_some(),
            "Async operations only allowed if the thread is owning the MainContext"
        );

        let user_data: Box_<glib::thread_guard::ThreadGuard<Q>> =
            Box_::new(glib::thread_guard::ThreadGuard::new(callback));
        unsafe extern "C" fn read_line_async_trampoline<
            Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            let mut error = ptr::null_mut();
            let mut length = mem::MaybeUninit::uninit();
            let ret = ffi::g_data_input_stream_read_line_finish(
                _source_object as *mut _,
                res,
                length.as_mut_ptr(),
                &mut error,
            );
            let length = length.assume_init();
            let result = if error.is_null() {
                Ok(FromGlibContainer::from_glib_full_num(ret, length))
            } else {
                Err(from_glib_full(error))
            };
            let callback: Box_<glib::thread_guard::ThreadGuard<Q>> =
                Box_::from_raw(user_data as *mut _);
            let callback = callback.into_inner();
            callback(result);
        }
        let callback = read_line_async_trampoline::<Q>;
        unsafe {
            ffi::g_data_input_stream_read_line_async(
                self.as_ref().to_glib_none().0,
                io_priority.into_glib(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                Some(callback),
                Box_::into_raw(user_data) as *mut _,
            );
        }
    }

    fn read_line_future(
        &self,
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Vec<u8>, glib::Error>> + 'static>> {
        Box_::pin(crate::GioFuture::new(
            self,
            move |obj, cancellable, send| {
                obj.read_line_async(io_priority, Some(cancellable), move |res| {
                    send.resolve(res);
                });
            },
        ))
    }

    fn read_line_utf8<P: IsA<Cancellable>>(
        &self,
        cancellable: Option<&P>,
    ) -> Result<Option<GString>, glib::Error> {
        unsafe {
            let mut error = ptr::null_mut();
            let ret = ffi::g_data_input_stream_read_line_utf8(
                self.as_ref().to_glib_none().0,
                ptr::null_mut(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    fn read_line_utf8_async<
        P: IsA<Cancellable>,
        Q: FnOnce(Result<Option<GString>, glib::Error>) + 'static,
    >(
        &self,
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    ) {
        let main_context = glib::MainContext::ref_thread_default();
        let is_main_context_owner = main_context.is_owner();
        let has_acquired_main_context = (!is_main_context_owner)
            .then(|| main_context.acquire().ok())
            .flatten();
        assert!(
            is_main_context_owner || has_acquired_main_context.is_some(),
            "Async operations only allowed if the thread is owning the MainContext"
        );

        let user_data: Box_<glib::thread_guard::ThreadGuard<Q>> =
            Box_::new(glib::thread_guard::ThreadGuard::new(callback));
        unsafe extern "C" fn read_line_async_trampoline<
            Q: FnOnce(Result<Option<GString>, glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            let mut error = ptr::null_mut();
            let ret = ffi::g_data_input_stream_read_line_finish(
                _source_object as *mut _,
                res,
                ptr::null_mut(),
                &mut error,
            );
            let result = if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            };
            let callback: Box_<glib::thread_guard::ThreadGuard<Q>> =
                Box_::from_raw(user_data as *mut _);
            let callback = callback.into_inner();
            callback(result);
        }
        let callback = read_line_async_trampoline::<Q>;
        unsafe {
            ffi::g_data_input_stream_read_line_async(
                self.as_ref().to_glib_none().0,
                io_priority.into_glib(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                Some(callback),
                Box_::into_raw(user_data) as *mut _,
            );
        }
    }

    fn read_line_utf8_future(
        &self,
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Option<GString>, glib::Error>> + 'static>>
    {
        Box_::pin(crate::GioFuture::new(
            self,
            move |obj, cancellable, send| {
                obj.read_line_utf8_async(io_priority, Some(cancellable), move |res| {
                    send.resolve(res);
                });
            },
        ))
    }

    fn read_upto<P: IsA<Cancellable>>(
        &self,
        stop_chars: &[u8],
        cancellable: Option<&P>,
    ) -> Result<Vec<u8>, glib::Error> {
        let stop_chars_len = stop_chars.len() as isize;
        unsafe {
            let mut error = ptr::null_mut();
            let mut length = mem::MaybeUninit::uninit();
            let ret = ffi::g_data_input_stream_read_upto(
                self.as_ref().to_glib_none().0,
                stop_chars.to_glib_none().0 as *const _,
                stop_chars_len,
                length.as_mut_ptr(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                let length = length.assume_init();
                Ok(FromGlibContainer::from_glib_full_num(
                    ret as *const _,
                    length,
                ))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    fn read_upto_async<P: IsA<Cancellable>, Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static>(
        &self,
        stop_chars: &[u8],
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    ) {
        let main_context = glib::MainContext::ref_thread_default();
        let is_main_context_owner = main_context.is_owner();
        let has_acquired_main_context = (!is_main_context_owner)
            .then(|| main_context.acquire().ok())
            .flatten();
        assert!(
            is_main_context_owner || has_acquired_main_context.is_some(),
            "Async operations only allowed if the thread is owning the MainContext"
        );

        let stop_chars_len = stop_chars.len() as isize;
        let user_data: Box_<glib::thread_guard::ThreadGuard<Q>> =
            Box_::new(glib::thread_guard::ThreadGuard::new(callback));
        unsafe extern "C" fn read_upto_async_trampoline<
            Q: FnOnce(Result<Vec<u8>, glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            let mut error = ptr::null_mut();
            let mut length = mem::MaybeUninit::uninit();
            let ret = ffi::g_data_input_stream_read_upto_finish(
                _source_object as *mut _,
                res,
                length.as_mut_ptr(),
                &mut error,
            );
            let result = if error.is_null() {
                let length = length.assume_init();
                Ok(FromGlibContainer::from_glib_full_num(
                    ret as *const _,
                    length,
                ))
            } else {
                Err(from_glib_full(error))
            };
            let callback: Box_<glib::thread_guard::ThreadGuard<Q>> =
                Box_::from_raw(user_data as *mut _);
            let callback = callback.into_inner();
            callback(result);
        }
        let callback = read_upto_async_trampoline::<Q>;
        unsafe {
            ffi::g_data_input_stream_read_upto_async(
                self.as_ref().to_glib_none().0,
                stop_chars.to_glib_none().0 as *const _,
                stop_chars_len,
                io_priority.into_glib(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                Some(callback),
                Box_::into_raw(user_data) as *mut _,
            );
        }
    }

    fn read_upto_future(
        &self,
        stop_chars: &[u8],
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Vec<u8>, glib::Error>> + 'static>> {
        let stop_chars = Vec::from(stop_chars);
        Box_::pin(crate::GioFuture::new(
            self,
            move |obj, cancellable, send| {
                obj.read_upto_async(&stop_chars, io_priority, Some(cancellable), move |res| {
                    send.resolve(res);
                });
            },
        ))
    }
}