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
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
use crate::ffi::pyport::{Py_hash_t, Py_ssize_t};
#[cfg(PyPy)]
use std::ffi::CStr;
use std::mem;
use std::os::raw::{c_char, c_int, c_uint, c_ulong, c_void};
use std::ptr;

#[repr(C)]
#[derive(Copy, Clone, Debug)]
#[cfg(not(PyPy))]
pub struct PyObject {
    #[cfg(py_sys_config = "Py_TRACE_REFS")]
    _ob_next: *mut PyObject,
    #[cfg(py_sys_config = "Py_TRACE_REFS")]
    _ob_prev: *mut PyObject,
    pub ob_refcnt: Py_ssize_t,
    pub ob_type: *mut PyTypeObject,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
#[cfg(PyPy)]
pub struct PyObject {
    pub ob_refcnt: Py_ssize_t,
    pub ob_pypy_link: Py_ssize_t,
    pub ob_type: *mut PyTypeObject,
}

#[cfg(py_sys_config = "Py_TRACE_REFS")]
#[cfg(not(PyPy))]
pub const PyObject_HEAD_INIT: PyObject = PyObject {
    _ob_next: ::std::ptr::null_mut(),
    _ob_prev: ::std::ptr::null_mut(),
    ob_refcnt: 1,
    ob_type: ::std::ptr::null_mut(),
};

#[cfg(not(py_sys_config = "Py_TRACE_REFS"))]
#[cfg(not(PyPy))]
pub const PyObject_HEAD_INIT: PyObject = PyObject {
    ob_refcnt: 1,
    ob_type: ::std::ptr::null_mut(),
};

#[cfg(py_sys_config = "Py_TRACE_REFS")]
#[cfg(PyPy)]
pub const PyObject_HEAD_INIT: PyObject = PyObject {
    _ob_next: ::std::ptr::null_mut(),
    _ob_prev: ::std::ptr::null_mut(),
    ob_refcnt: 1,
    ob_pypy_link: 0,
    ob_type: ::std::ptr::null_mut(),
};

#[cfg(not(py_sys_config = "Py_TRACE_REFS"))]
#[cfg(PyPy)]
pub const PyObject_HEAD_INIT: PyObject = PyObject {
    ob_refcnt: 1,
    ob_pypy_link: 0,
    ob_type: ::std::ptr::null_mut(),
};

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct PyVarObject {
    pub ob_base: PyObject,
    pub ob_size: Py_ssize_t,
}

#[inline]
pub unsafe fn Py_REFCNT(ob: *mut PyObject) -> Py_ssize_t {
    if ob.is_null() {
        panic!();
    }
    (*ob).ob_refcnt
}

#[cfg(PyPy)]
pub unsafe fn _PyObject_NextNotImplemented(arg1: *mut PyObject) -> *mut PyObject {
    return crate::ffi::pyerrors::PyErr_Format(
        crate::ffi::pyerrors::PyExc_TypeError,
        CStr::from_bytes_with_nul(b"'%.200s' object is not iterable\0")
            .unwrap()
            .as_ptr(),
        Py_TYPE((*(arg1 as *mut PyTypeObject)).tp_name as *mut PyObject),
    );
}

#[inline]
pub unsafe fn Py_TYPE(ob: *mut PyObject) -> *mut PyTypeObject {
    (*ob).ob_type
}

#[inline]
pub unsafe fn Py_SIZE(ob: *mut PyObject) -> Py_ssize_t {
    (*(ob as *mut PyVarObject)).ob_size
}

pub type unaryfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> *mut PyObject;

pub type binaryfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject) -> *mut PyObject;

pub type ternaryfunc = unsafe extern "C" fn(
    arg1: *mut PyObject,
    arg2: *mut PyObject,
    arg3: *mut PyObject,
) -> *mut PyObject;

pub type inquiry = unsafe extern "C" fn(arg1: *mut PyObject) -> c_int;

pub type lenfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> Py_ssize_t;

pub type ssizeargfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: Py_ssize_t) -> *mut PyObject;

pub type ssizessizeargfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: Py_ssize_t, arg3: Py_ssize_t) -> *mut PyObject;

pub type ssizeobjargproc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: Py_ssize_t, arg3: *mut PyObject) -> c_int;

pub type ssizessizeobjargproc = unsafe extern "C" fn(
    arg1: *mut PyObject,
    arg2: Py_ssize_t,
    arg3: Py_ssize_t,
    arg4: *mut PyObject,
) -> c_int;

pub type objobjargproc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject, arg3: *mut PyObject) -> c_int;

#[cfg(not(Py_LIMITED_API))]
mod bufferinfo {
    use crate::ffi::pyport::Py_ssize_t;
    use std::os::raw::{c_char, c_int, c_void};
    use std::ptr;

    #[repr(C)]
    #[derive(Copy, Clone)]
    pub struct Py_buffer {
        pub buf: *mut c_void,
        pub obj: *mut crate::ffi::PyObject,
        pub len: Py_ssize_t,
        pub itemsize: Py_ssize_t,
        pub readonly: c_int,
        pub ndim: c_int,
        pub format: *mut c_char,
        pub shape: *mut Py_ssize_t,
        pub strides: *mut Py_ssize_t,
        pub suboffsets: *mut Py_ssize_t,
        pub internal: *mut c_void,
    }

    impl Py_buffer {
        pub const fn new() -> Self {
            Py_buffer {
                buf: ptr::null_mut(),
                obj: ptr::null_mut(),
                len: 0,
                itemsize: 0,
                readonly: 0,
                ndim: 0,
                format: ptr::null_mut(),
                shape: ptr::null_mut(),
                strides: ptr::null_mut(),
                suboffsets: ptr::null_mut(),
                internal: ptr::null_mut(),
            }
        }
    }

    pub type getbufferproc = unsafe extern "C" fn(
        arg1: *mut crate::ffi::PyObject,
        arg2: *mut Py_buffer,
        arg3: c_int,
    ) -> c_int;
    pub type releasebufferproc =
        unsafe extern "C" fn(arg1: *mut crate::ffi::PyObject, arg2: *mut Py_buffer);

    /// Maximum number of dimensions
    pub const PyBUF_MAX_NDIM: c_int = 64;

    /* Flags for getting buffers */
    pub const PyBUF_SIMPLE: c_int = 0;
    pub const PyBUF_WRITABLE: c_int = 0x0001;
    /*  we used to include an E, backwards compatible alias  */
    pub const PyBUF_WRITEABLE: c_int = PyBUF_WRITABLE;
    pub const PyBUF_FORMAT: c_int = 0x0004;
    pub const PyBUF_ND: c_int = 0x0008;
    pub const PyBUF_STRIDES: c_int = 0x0010 | PyBUF_ND;
    pub const PyBUF_C_CONTIGUOUS: c_int = 0x0020 | PyBUF_STRIDES;
    pub const PyBUF_F_CONTIGUOUS: c_int = 0x0040 | PyBUF_STRIDES;
    pub const PyBUF_ANY_CONTIGUOUS: c_int = 0x0080 | PyBUF_STRIDES;
    pub const PyBUF_INDIRECT: c_int = 0x0100 | PyBUF_STRIDES;

    pub const PyBUF_CONTIG: c_int = PyBUF_ND | PyBUF_WRITABLE;
    pub const PyBUF_CONTIG_RO: c_int = PyBUF_ND;

    pub const PyBUF_STRIDED: c_int = PyBUF_STRIDES | PyBUF_WRITABLE;
    pub const PyBUF_STRIDED_RO: c_int = PyBUF_STRIDES;

    pub const PyBUF_RECORDS: c_int = PyBUF_STRIDES | PyBUF_WRITABLE | PyBUF_FORMAT;
    pub const PyBUF_RECORDS_RO: c_int = PyBUF_STRIDES | PyBUF_FORMAT;

    pub const PyBUF_FULL: c_int = PyBUF_INDIRECT | PyBUF_WRITABLE | PyBUF_FORMAT;
    pub const PyBUF_FULL_RO: c_int = PyBUF_INDIRECT | PyBUF_FORMAT;

    pub const PyBUF_READ: c_int = 0x100;
    pub const PyBUF_WRITE: c_int = 0x200;
}
#[cfg(not(Py_LIMITED_API))]
pub use self::bufferinfo::*;

pub type objobjproc = unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject) -> c_int;
pub type visitproc = unsafe extern "C" fn(object: *mut PyObject, arg: *mut c_void) -> c_int;
pub type traverseproc =
    unsafe extern "C" fn(slf: *mut PyObject, visit: visitproc, arg: *mut c_void) -> c_int;

pub type freefunc = unsafe extern "C" fn(arg1: *mut c_void);
pub type destructor = unsafe extern "C" fn(arg1: *mut PyObject);
#[cfg(not(Py_LIMITED_API))]
pub type printfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut ::libc::FILE, arg3: c_int) -> c_int;
pub type getattrfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut c_char) -> *mut PyObject;
pub type getattrofunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject) -> *mut PyObject;
pub type setattrfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut c_char, arg3: *mut PyObject) -> c_int;
pub type setattrofunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject, arg3: *mut PyObject) -> c_int;
pub type reprfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> *mut PyObject;
pub type hashfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> Py_hash_t;
pub type richcmpfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject, arg3: c_int) -> *mut PyObject;
pub type getiterfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> *mut PyObject;
pub type iternextfunc = unsafe extern "C" fn(arg1: *mut PyObject) -> *mut PyObject;
pub type descrgetfunc = unsafe extern "C" fn(
    arg1: *mut PyObject,
    arg2: *mut PyObject,
    arg3: *mut PyObject,
) -> *mut PyObject;
pub type descrsetfunc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject, arg3: *mut PyObject) -> c_int;
pub type initproc =
    unsafe extern "C" fn(arg1: *mut PyObject, arg2: *mut PyObject, arg3: *mut PyObject) -> c_int;
pub type newfunc = unsafe extern "C" fn(
    arg1: *mut PyTypeObject,
    arg2: *mut PyObject,
    arg3: *mut PyObject,
) -> *mut PyObject;
pub type allocfunc =
    unsafe extern "C" fn(arg1: *mut PyTypeObject, arg2: Py_ssize_t) -> *mut PyObject;
#[cfg(Py_3_8)]
pub type vectorcallfunc = unsafe extern "C" fn(
    callable: *mut PyObject,
    args: *const *mut PyObject,
    nargsf: libc::size_t,
    kwnames: *mut PyObject,
) -> *mut PyObject;

#[cfg(Py_LIMITED_API)]
mod typeobject {
    pub enum PyTypeObject {}
}

#[cfg(not(Py_LIMITED_API))]
mod typeobject {
    use crate::ffi::pyport::Py_ssize_t;
    use crate::ffi::{self, object};
    use std::mem;
    use std::os::raw::{c_char, c_uint, c_ulong, c_void};
    use std::ptr;

    #[repr(C)]
    #[derive(Copy, Clone)]
    pub struct PyNumberMethods {
        pub nb_add: Option<object::binaryfunc>,
        pub nb_subtract: Option<object::binaryfunc>,
        pub nb_multiply: Option<object::binaryfunc>,
        pub nb_remainder: Option<object::binaryfunc>,
        pub nb_divmod: Option<object::binaryfunc>,
        pub nb_power: Option<object::ternaryfunc>,
        pub nb_negative: Option<object::unaryfunc>,
        pub nb_positive: Option<object::unaryfunc>,
        pub nb_absolute: Option<object::unaryfunc>,
        pub nb_bool: Option<object::inquiry>,
        pub nb_invert: Option<object::unaryfunc>,
        pub nb_lshift: Option<object::binaryfunc>,
        pub nb_rshift: Option<object::binaryfunc>,
        pub nb_and: Option<object::binaryfunc>,
        pub nb_xor: Option<object::binaryfunc>,
        pub nb_or: Option<object::binaryfunc>,
        pub nb_int: Option<object::unaryfunc>,
        pub nb_reserved: *mut c_void,
        pub nb_float: Option<object::unaryfunc>,
        pub nb_inplace_add: Option<object::binaryfunc>,
        pub nb_inplace_subtract: Option<object::binaryfunc>,
        pub nb_inplace_multiply: Option<object::binaryfunc>,
        pub nb_inplace_remainder: Option<object::binaryfunc>,
        pub nb_inplace_power: Option<object::ternaryfunc>,
        pub nb_inplace_lshift: Option<object::binaryfunc>,
        pub nb_inplace_rshift: Option<object::binaryfunc>,
        pub nb_inplace_and: Option<object::binaryfunc>,
        pub nb_inplace_xor: Option<object::binaryfunc>,
        pub nb_inplace_or: Option<object::binaryfunc>,
        pub nb_floor_divide: Option<object::binaryfunc>,
        pub nb_true_divide: Option<object::binaryfunc>,
        pub nb_inplace_floor_divide: Option<object::binaryfunc>,
        pub nb_inplace_true_divide: Option<object::binaryfunc>,
        pub nb_index: Option<object::unaryfunc>,
        pub nb_matrix_multiply: Option<object::binaryfunc>,
        pub nb_inplace_matrix_multiply: Option<object::binaryfunc>,
    }

    macro_rules! as_expr {
        ($e:expr) => {
            $e
        };
    }

    #[repr(C)]
    #[derive(Clone)]
    pub struct PySequenceMethods {
        pub sq_length: Option<object::lenfunc>,
        pub sq_concat: Option<object::binaryfunc>,
        pub sq_repeat: Option<object::ssizeargfunc>,
        pub sq_item: Option<object::ssizeargfunc>,
        pub was_sq_slice: *mut c_void,
        pub sq_ass_item: Option<object::ssizeobjargproc>,
        pub was_sq_ass_slice: *mut c_void,
        pub sq_contains: Option<object::objobjproc>,
        pub sq_inplace_concat: Option<object::binaryfunc>,
        pub sq_inplace_repeat: Option<object::ssizeargfunc>,
    }

    #[repr(C)]
    #[derive(Clone, Default)]
    pub struct PyMappingMethods {
        pub mp_length: Option<object::lenfunc>,
        pub mp_subscript: Option<object::binaryfunc>,
        pub mp_ass_subscript: Option<object::objobjargproc>,
    }

    #[repr(C)]
    #[derive(Clone, Default)]
    pub struct PyAsyncMethods {
        pub am_await: Option<object::unaryfunc>,
        pub am_aiter: Option<object::unaryfunc>,
        pub am_anext: Option<object::unaryfunc>,
    }

    #[repr(C)]
    #[derive(Clone, Default)]
    pub struct PyBufferProcs {
        pub bf_getbuffer: Option<object::getbufferproc>,
        pub bf_releasebuffer: Option<object::releasebufferproc>,
    }

    #[repr(C)]
    #[derive(Debug, Copy, Clone)]
    pub struct PyTypeObject {
        #[cfg(PyPy)]
        pub ob_refcnt: Py_ssize_t,
        #[cfg(PyPy)]
        pub ob_pypy_link: Py_ssize_t,
        #[cfg(PyPy)]
        pub ob_type: *mut PyTypeObject,
        #[cfg(PyPy)]
        pub ob_size: Py_ssize_t,
        #[cfg(not(PyPy))]
        pub ob_base: object::PyVarObject,
        pub tp_name: *const c_char,
        pub tp_basicsize: Py_ssize_t,
        pub tp_itemsize: Py_ssize_t,
        pub tp_dealloc: Option<object::destructor>,
        #[cfg(not(Py_3_8))]
        pub tp_print: Option<object::printfunc>,
        #[cfg(Py_3_8)]
        pub tp_vectorcall_offset: Py_ssize_t,
        pub tp_getattr: Option<object::getattrfunc>,
        pub tp_setattr: Option<object::setattrfunc>,
        pub tp_as_async: *mut PyAsyncMethods,
        pub tp_repr: Option<object::reprfunc>,
        pub tp_as_number: *mut PyNumberMethods,
        pub tp_as_sequence: *mut PySequenceMethods,
        pub tp_as_mapping: *mut PyMappingMethods,
        pub tp_hash: Option<object::hashfunc>,
        pub tp_call: Option<object::ternaryfunc>,
        pub tp_str: Option<object::reprfunc>,
        pub tp_getattro: Option<object::getattrofunc>,
        pub tp_setattro: Option<object::setattrofunc>,
        pub tp_as_buffer: *mut PyBufferProcs,
        pub tp_flags: c_ulong,
        pub tp_doc: *const c_char,
        pub tp_traverse: Option<object::traverseproc>,
        pub tp_clear: Option<object::inquiry>,
        pub tp_richcompare: Option<object::richcmpfunc>,
        pub tp_weaklistoffset: Py_ssize_t,
        pub tp_iter: Option<object::getiterfunc>,
        pub tp_iternext: Option<object::iternextfunc>,
        pub tp_methods: *mut ffi::methodobject::PyMethodDef,
        pub tp_members: *mut ffi::structmember::PyMemberDef,
        pub tp_getset: *mut ffi::descrobject::PyGetSetDef,
        pub tp_base: *mut PyTypeObject,
        pub tp_dict: *mut object::PyObject,
        pub tp_descr_get: Option<object::descrgetfunc>,
        pub tp_descr_set: Option<object::descrsetfunc>,
        pub tp_dictoffset: Py_ssize_t,
        pub tp_init: Option<object::initproc>,
        pub tp_alloc: Option<object::allocfunc>,
        pub tp_new: Option<object::newfunc>,
        pub tp_free: Option<object::freefunc>,
        pub tp_is_gc: Option<object::inquiry>,
        pub tp_bases: *mut object::PyObject,
        pub tp_mro: *mut object::PyObject,
        pub tp_cache: *mut object::PyObject,
        pub tp_subclasses: *mut object::PyObject,
        pub tp_weaklist: *mut object::PyObject,
        pub tp_del: Option<object::destructor>,
        pub tp_version_tag: c_uint,
        pub tp_finalize: Option<object::destructor>,
        #[cfg(Py_3_8)]
        pub tp_vectorcall: Option<object::vectorcallfunc>,
        #[cfg(PyPy)]
        pub tp_pypy_flags: ::std::os::raw::c_long,
        #[cfg(py_sys_config = "COUNT_ALLOCS")]
        pub tp_allocs: Py_ssize_t,
        #[cfg(py_sys_config = "COUNT_ALLOCS")]
        pub tp_frees: Py_ssize_t,
        #[cfg(py_sys_config = "COUNT_ALLOCS")]
        pub tp_maxalloc: Py_ssize_t,
        #[cfg(py_sys_config = "COUNT_ALLOCS")]
        pub tp_prev: *mut PyTypeObject,
        #[cfg(py_sys_config = "COUNT_ALLOCS")]
        pub tp_next: *mut PyTypeObject,
    }

    macro_rules! _type_object_init {
        ({$($head:tt)*}, $($tail:tt)*) => {
            as_expr! {
                PyTypeObject {
                    $($head)*
                    tp_name: ptr::null(),
                    tp_basicsize: 0,
                    tp_itemsize: 0,
                    tp_dealloc: None,
                    #[cfg(not(Py_3_8))]
                    tp_print: None,
                    #[cfg(Py_3_8)]
                    tp_vectorcall_offset: 0,
                    tp_getattr: None,
                    tp_setattr: None,
                    tp_as_async: ptr::null_mut(),
                    tp_repr: None,
                    tp_as_number: ptr::null_mut(),
                    tp_as_sequence: ptr::null_mut(),
                    tp_as_mapping: ptr::null_mut(),
                    tp_hash: None,
                    tp_call: None,
                    tp_str: None,
                    tp_getattro: None,
                    tp_setattro: None,
                    tp_as_buffer: ptr::null_mut(),
                    tp_flags: object::Py_TPFLAGS_DEFAULT,
                    tp_doc: ptr::null(),
                    tp_traverse: None,
                    tp_clear: None,
                    tp_richcompare: None,
                    tp_weaklistoffset: 0,
                    tp_iter: None,
                    tp_iternext: None,
                    tp_methods: ptr::null_mut(),
                    tp_members: ptr::null_mut(),
                    tp_getset: ptr::null_mut(),
                    tp_base: ptr::null_mut(),
                    tp_dict: ptr::null_mut(),
                    tp_descr_get: None,
                    tp_descr_set: None,
                    tp_dictoffset: 0,
                    tp_init: None,
                    tp_alloc: None,
                    tp_new: None,
                    tp_free: None,
                    tp_is_gc: None,
                    tp_bases: ptr::null_mut(),
                    tp_mro: ptr::null_mut(),
                    tp_cache: ptr::null_mut(),
                    tp_subclasses: ptr::null_mut(),
                    tp_weaklist: ptr::null_mut(),
                    tp_del: None,
                    tp_version_tag: 0,
                    tp_finalize: None,
                    #[cfg(Py_3_8)]
                    tp_vectorcall: None,
                    $($tail)*
                }
            }
        }
    }

    #[cfg(PyPy)]
    macro_rules! type_object_init {
        ($($tail:tt)*) => {
            _type_object_init!({
                    ob_refcnt: 1,
                    ob_pypy_link: 0,
                    ob_type: ptr::null_mut(),
                    ob_size: 0,
                },
                tp_pypy_flags: 0,
                $($tail)*
            )
        }
    }

    #[cfg(not(PyPy))]
    macro_rules! type_object_init {
        ($($tail:tt)*) => {
            _type_object_init!({
                ob_base: object::PyVarObject {
                    ob_base: object::PyObject_HEAD_INIT,
                    ob_size: 0
                },},
                $($tail)*
            )
        }
    }

    #[cfg(py_sys_config = "COUNT_ALLOCS")]
    pub const PyTypeObject_INIT: PyTypeObject = type_object_init! {
        tp_allocs: 0,
        tp_frees: 0,
        tp_maxalloc: 0,
        tp_prev: ptr::null_mut(),
        tp_next: ptr::null_mut(),
    };

    #[cfg(not(py_sys_config = "COUNT_ALLOCS"))]
    pub const PyTypeObject_INIT: PyTypeObject = type_object_init!();

    #[repr(C)]
    #[derive(Clone)]
    pub struct PyHeapTypeObject {
        pub ht_type: PyTypeObject,
        pub as_async: PyAsyncMethods,
        pub as_number: PyNumberMethods,
        pub as_mapping: PyMappingMethods,
        pub as_sequence: PySequenceMethods,
        pub as_buffer: PyBufferProcs,
        pub ht_name: *mut object::PyObject,
        pub ht_slots: *mut object::PyObject,
        pub ht_qualname: *mut object::PyObject,
        pub ht_cached_keys: *mut c_void,
    }

    impl Default for PyHeapTypeObject {
        #[inline]
        fn default() -> Self {
            unsafe { mem::zeroed() }
        }
    }

    #[inline]
    pub unsafe fn PyHeapType_GET_MEMBERS(
        etype: *mut PyHeapTypeObject,
    ) -> *mut ffi::structmember::PyMemberDef {
        let py_type = object::Py_TYPE(etype as *mut object::PyObject);
        let ptr = etype.offset((*py_type).tp_basicsize);
        ptr as *mut ffi::structmember::PyMemberDef
    }
}

// The exported types depend on whether Py_LIMITED_API is set
pub use self::typeobject::*;

#[repr(C)]
#[derive(Copy, Clone)]
pub struct PyType_Slot {
    pub slot: c_int,
    pub pfunc: *mut c_void,
}

impl Default for PyType_Slot {
    fn default() -> PyType_Slot {
        unsafe { mem::zeroed() }
    }
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct PyType_Spec {
    pub name: *const c_char,
    pub basicsize: c_int,
    pub itemsize: c_int,
    pub flags: c_uint,
    pub slots: *mut PyType_Slot,
}

impl Default for PyType_Spec {
    fn default() -> PyType_Spec {
        unsafe { mem::zeroed() }
    }
}

extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPyType_FromSpec")]
    pub fn PyType_FromSpec(arg1: *mut PyType_Spec) -> *mut PyObject;

    #[cfg_attr(PyPy, link_name = "PyPyType_FromSpecWithBases")]
    pub fn PyType_FromSpecWithBases(arg1: *mut PyType_Spec, arg2: *mut PyObject) -> *mut PyObject;

    pub fn PyType_GetSlot(arg1: *mut PyTypeObject, arg2: c_int) -> *mut c_void;
}

extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPyType_IsSubtype")]
    pub fn PyType_IsSubtype(a: *mut PyTypeObject, b: *mut PyTypeObject) -> c_int;
}

#[inline]
pub unsafe fn PyObject_TypeCheck(ob: *mut PyObject, tp: *mut PyTypeObject) -> c_int {
    (Py_TYPE(ob) == tp || PyType_IsSubtype(Py_TYPE(ob), tp) != 0) as c_int
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    /// built-in 'type'
    #[cfg_attr(PyPy, link_name = "PyPyType_Type")]
    pub static mut PyType_Type: PyTypeObject;
    /// built-in 'object'
    #[cfg_attr(PyPy, link_name = "PyPyBaseObject_Type")]
    pub static mut PyBaseObject_Type: PyTypeObject;
    /// built-in 'super'
    pub static mut PySuper_Type: PyTypeObject;
}

extern "C" {
    pub fn PyType_GetFlags(arg1: *mut PyTypeObject) -> c_ulong;
}

#[inline]
pub unsafe fn PyType_Check(op: *mut PyObject) -> c_int {
    PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TYPE_SUBCLASS)
}

#[inline]
pub unsafe fn PyType_CheckExact(op: *mut PyObject) -> c_int {
    (Py_TYPE(op) == &mut PyType_Type) as c_int
}

extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPyType_Ready")]
    pub fn PyType_Ready(t: *mut PyTypeObject) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyType_GenericAlloc")]
    pub fn PyType_GenericAlloc(t: *mut PyTypeObject, nitems: Py_ssize_t) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyType_GenericNew")]
    pub fn PyType_GenericNew(
        t: *mut PyTypeObject,
        args: *mut PyObject,
        kwds: *mut PyObject,
    ) -> *mut PyObject;
    pub fn PyType_ClearCache() -> c_uint;
    #[cfg_attr(PyPy, link_name = "PyPyType_Modified")]
    pub fn PyType_Modified(t: *mut PyTypeObject);

    #[cfg(not(Py_LIMITED_API))]
    #[cfg_attr(PyPy, link_name = "PyPyObject_Print")]
    pub fn PyObject_Print(o: *mut PyObject, fp: *mut ::libc::FILE, flags: c_int) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_Repr")]
    pub fn PyObject_Repr(o: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_Str")]
    pub fn PyObject_Str(o: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_ASCII")]
    pub fn PyObject_ASCII(arg1: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_Bytes")]
    pub fn PyObject_Bytes(arg1: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_RichCompare")]
    pub fn PyObject_RichCompare(
        arg1: *mut PyObject,
        arg2: *mut PyObject,
        arg3: c_int,
    ) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_RichCompareBool")]
    pub fn PyObject_RichCompareBool(arg1: *mut PyObject, arg2: *mut PyObject, arg3: c_int)
        -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_GetAttrString")]
    pub fn PyObject_GetAttrString(arg1: *mut PyObject, arg2: *const c_char) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_SetAttrString")]
    pub fn PyObject_SetAttrString(
        arg1: *mut PyObject,
        arg2: *const c_char,
        arg3: *mut PyObject,
    ) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_HasAttrString")]
    pub fn PyObject_HasAttrString(arg1: *mut PyObject, arg2: *const c_char) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_GetAttr")]
    pub fn PyObject_GetAttr(arg1: *mut PyObject, arg2: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_SetAttr")]
    pub fn PyObject_SetAttr(arg1: *mut PyObject, arg2: *mut PyObject, arg3: *mut PyObject)
        -> c_int;
    pub fn PyObject_HasAttr(arg1: *mut PyObject, arg2: *mut PyObject) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_SelfIter")]
    pub fn PyObject_SelfIter(arg1: *mut PyObject) -> *mut PyObject;

    #[cfg(not(Py_LIMITED_API))]
    #[cfg(not(PyPy))]
    pub fn _PyObject_NextNotImplemented(arg1: *mut PyObject) -> *mut PyObject;

    #[cfg_attr(PyPy, link_name = "PyPyObject_GenericGetAttr")]
    pub fn PyObject_GenericGetAttr(arg1: *mut PyObject, arg2: *mut PyObject) -> *mut PyObject;
    #[cfg_attr(PyPy, link_name = "PyPyObject_GenericSetAttr")]
    pub fn PyObject_GenericSetAttr(
        arg1: *mut PyObject,
        arg2: *mut PyObject,
        arg3: *mut PyObject,
    ) -> c_int;
    #[cfg(not(Py_LIMITED_API))]
    pub fn PyObject_GenericGetDict(arg1: *mut PyObject, arg2: *mut c_void) -> *mut PyObject;
    pub fn PyObject_GenericSetDict(
        arg1: *mut PyObject,
        arg2: *mut PyObject,
        arg3: *mut c_void,
    ) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_Hash")]
    pub fn PyObject_Hash(arg1: *mut PyObject) -> Py_hash_t;
    #[cfg_attr(PyPy, link_name = "PyPyObject_HashNotImplemented")]
    pub fn PyObject_HashNotImplemented(arg1: *mut PyObject) -> Py_hash_t;
    #[cfg_attr(PyPy, link_name = "PyPyObject_IsTrue")]
    pub fn PyObject_IsTrue(arg1: *mut PyObject) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_Not")]
    pub fn PyObject_Not(arg1: *mut PyObject) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyCallable_Check")]
    pub fn PyCallable_Check(arg1: *mut PyObject) -> c_int;
    #[cfg_attr(PyPy, link_name = "PyPyObject_ClearWeakRefs")]
    pub fn PyObject_ClearWeakRefs(arg1: *mut PyObject);
    #[cfg(not(Py_LIMITED_API))]
    pub fn PyObject_CallFinalizer(arg1: *mut PyObject);
    #[cfg(not(Py_LIMITED_API))]
    #[cfg_attr(PyPy, link_name = "PyPyObject_CallFinalizerFromDealloc")]
    pub fn PyObject_CallFinalizerFromDealloc(arg1: *mut PyObject) -> c_int;

    #[cfg_attr(PyPy, link_name = "PyPyObject_Dir")]
    pub fn PyObject_Dir(arg1: *mut PyObject) -> *mut PyObject;
    pub fn Py_ReprEnter(arg1: *mut PyObject) -> c_int;
    pub fn Py_ReprLeave(arg1: *mut PyObject);
}

// Flag bits for printing:
pub const Py_PRINT_RAW: c_int = 1; // No string quotes etc.

/// Set if the type object is dynamically allocated
pub const Py_TPFLAGS_HEAPTYPE: c_ulong = 1 << 9;

/// Set if the type allows subclassing
pub const Py_TPFLAGS_BASETYPE: c_ulong = 1 << 10;

/// Set if the type implements the vectorcall protocol (PEP 590)
#[cfg(all(Py_3_8, not(Py_LIMITED_API)))]
pub const Py_TPFLAGS_HAVE_VECTORCALL: c_ulong = 1 << 11;

/// Set if the type is 'ready' -- fully initialized
pub const Py_TPFLAGS_READY: c_ulong = 1 << 12;

/// Set while the type is being 'readied', to prevent recursive ready calls
pub const Py_TPFLAGS_READYING: c_ulong = 1 << 13;

/// Objects support garbage collection (see objimp.h)
pub const Py_TPFLAGS_HAVE_GC: c_ulong = 1 << 14;

const Py_TPFLAGS_HAVE_STACKLESS_EXTENSION: c_ulong = 0;

/// Objects support type attribute cache
pub const Py_TPFLAGS_HAVE_VERSION_TAG: c_ulong = 1 << 18;
pub const Py_TPFLAGS_VALID_VERSION_TAG: c_ulong = 1 << 19;

/* Type is abstract and cannot be instantiated */
pub const Py_TPFLAGS_IS_ABSTRACT: c_ulong = 1 << 20;

/* These flags are used to determine if a type is a subclass. */
pub const Py_TPFLAGS_LONG_SUBCLASS: c_ulong = 1 << 24;
pub const Py_TPFLAGS_LIST_SUBCLASS: c_ulong = 1 << 25;
pub const Py_TPFLAGS_TUPLE_SUBCLASS: c_ulong = 1 << 26;
pub const Py_TPFLAGS_BYTES_SUBCLASS: c_ulong = 1 << 27;
pub const Py_TPFLAGS_UNICODE_SUBCLASS: c_ulong = 1 << 28;
pub const Py_TPFLAGS_DICT_SUBCLASS: c_ulong = 1 << 29;
pub const Py_TPFLAGS_BASE_EXC_SUBCLASS: c_ulong = 1 << 30;
pub const Py_TPFLAGS_TYPE_SUBCLASS: c_ulong = 1 << 31;

pub const Py_TPFLAGS_DEFAULT: c_ulong =
    Py_TPFLAGS_HAVE_STACKLESS_EXTENSION | Py_TPFLAGS_HAVE_VERSION_TAG;

pub const Py_TPFLAGS_HAVE_FINALIZE: c_ulong = 1;

#[inline]
#[cfg(Py_LIMITED_API)]
pub unsafe fn PyType_HasFeature(t: *mut PyTypeObject, f: c_ulong) -> c_int {
    ((PyType_GetFlags(t) & f) != 0) as c_int
}

#[inline]
#[cfg(not(Py_LIMITED_API))]
pub unsafe fn PyType_HasFeature(t: *mut PyTypeObject, f: c_ulong) -> c_int {
    (((*t).tp_flags & f) != 0) as c_int
}

#[inline]
pub unsafe fn PyType_FastSubclass(t: *mut PyTypeObject, f: c_ulong) -> c_int {
    PyType_HasFeature(t, f)
}

extern "C" {
    #[cfg_attr(PyPy, link_name = "_PyPy_Dealloc")]
    pub fn _Py_Dealloc(arg1: *mut PyObject);
}

// Reference counting macros.
#[inline]
pub unsafe fn Py_INCREF(op: *mut PyObject) {
    if cfg!(py_sys_config = "Py_REF_DEBUG") {
        Py_IncRef(op)
    } else {
        (*op).ob_refcnt += 1
    }
}

#[inline]
pub unsafe fn Py_DECREF(op: *mut PyObject) {
    if cfg!(py_sys_config = "Py_REF_DEBUG") {
        Py_DecRef(op)
    } else {
        (*op).ob_refcnt -= 1;
        if (*op).ob_refcnt == 0 {
            _Py_Dealloc(op)
        }
    }
}

#[inline]
pub unsafe fn Py_CLEAR(op: &mut *mut PyObject) {
    let tmp = *op;
    if !tmp.is_null() {
        *op = ptr::null_mut();
        Py_DECREF(tmp);
    }
}

#[inline]
pub unsafe fn Py_XINCREF(op: *mut PyObject) {
    if !op.is_null() {
        Py_INCREF(op)
    }
}

#[inline]
pub unsafe fn Py_XDECREF(op: *mut PyObject) {
    if !op.is_null() {
        Py_DECREF(op)
    }
}

extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPy_IncRef")]
    pub fn Py_IncRef(o: *mut PyObject);
    #[cfg_attr(PyPy, link_name = "PyPy_DecRef")]
    pub fn Py_DecRef(o: *mut PyObject);
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    #[cfg_attr(PyPy, link_name = "_PyPy_NoneStruct")]
    static mut _Py_NoneStruct: PyObject;
    #[cfg_attr(PyPy, link_name = "_PyPy_NotImplementedStruct")]
    static mut _Py_NotImplementedStruct: PyObject;
}

#[inline]
pub unsafe fn Py_None() -> *mut PyObject {
    &mut _Py_NoneStruct
}

#[inline]
pub unsafe fn Py_NotImplemented() -> *mut PyObject {
    &mut _Py_NotImplementedStruct
}

/* Rich comparison opcodes */
pub const Py_LT: c_int = 0;
pub const Py_LE: c_int = 1;
pub const Py_EQ: c_int = 2;
pub const Py_NE: c_int = 3;
pub const Py_GT: c_int = 4;
pub const Py_GE: c_int = 5;

#[inline]
pub fn PyObject_Check(_arg1: *mut PyObject) -> c_int {
    1
}

#[inline]
pub fn PySuper_Check(_arg1: *mut PyObject) -> c_int {
    0
}