Repository navigation
Expand file tree
/
Copy patharray.cs
More file actions
1295 lines (1078 loc) · 49 KB
/
Copy patharray.cs
File metadata and controls
1295 lines (1078 loc) · 49 KB
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
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* [email protected]. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using IronPython.Runtime;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
using SpecialName = System.Runtime.CompilerServices.SpecialNameAttribute;
using System.Reflection;
using System.Numerics;
[assembly: PythonModule("array", typeof(IronPython.Modules.ArrayModule))]
namespace IronPython.Modules {
public static class ArrayModule {
public const string __doc__ = "Provides arrays for native data types. These can be used for compact storage or native interop via ctypes";
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
public static readonly PythonType/*!*/ ArrayType = DynamicHelpers.GetPythonTypeFromType(typeof(array));
[PythonType]
public class array : IPythonArray, IEnumerable, IWeakReferenceable, ICollection, ICodeFormattable, IList<object>, IStructuralEquatable
{
private ArrayData _data;
private char _typeCode;
private WeakRefTracker _tracker;
public array([BytesConversion]string type, [Optional]object initializer) {
if (type == null || type.Length != 1) {
throw PythonOps.TypeError("expected character, got {0}", PythonTypeOps.GetName(type));
}
_typeCode = type[0];
_data = CreateData(_typeCode);
if (initializer != Missing.Value) extend(initializer);
}
private array(char typeCode, ArrayData data) {
_typeCode = typeCode;
_data = data;
}
private static ArrayData CreateData(char typecode) {
ArrayData data;
switch (typecode) {
case 'c': data = new ArrayData<char>(); break;
case 'b': data = new ArrayData<sbyte>(); break;
case 'B': data = new ArrayData<byte>(); break;
case 'u': data = new ArrayData<char>(); break;
case 'h': data = new ArrayData<short>(); break;
case 'H': data = new ArrayData<ushort>(); break;
case 'l':
case 'i': data = new ArrayData<int>(); break;
case 'L':
case 'I': data = new ArrayData<uint>(); break;
case 'f': data = new ArrayData<float>(); break;
case 'd': data = new ArrayData<double>(); break;
default:
throw PythonOps.ValueError("Bad type code (expected one of 'c', 'b', 'B', 'u', 'H', 'h', 'i', 'I', 'l', 'L', 'f', 'd')");
}
return data;
}
[SpecialName]
public array InPlaceAdd(array other) {
if (typecode != other.typecode) throw PythonOps.TypeError("cannot add different typecodes");
if (other._data.Length != 0) {
extend(other);
}
return this;
}
public static array operator +(array self, array other) {
if (self.typecode != other.typecode) throw PythonOps.TypeError("cannot add different typecodes");
array res = new array(self.typecode, Missing.Value);
foreach (object o in self) {
res.append(o);
}
foreach (object o in other) {
res.append(o);
}
return res;
}
[SpecialName]
public array InPlaceMultiply(int value) {
if (value <= 0) {
_data.Clear();
} else {
List myData = tolist();
for (int i = 0; i < (value - 1); i++) {
extend(myData);
}
}
return this;
}
public static array operator *(array array, int value) {
if ((BigInteger)value * array.__len__() * array.itemsize > SysModule.maxsize) {
throw PythonOps.MemoryError("");
}
if (value <= 0) {
return new array(array.typecode, Missing.Value);
}
return new array(array._typeCode, array._data.Multiply(value));
}
public static array operator *(array array, BigInteger value) {
int intValue;
if (!value.AsInt32(out intValue)) {
throw PythonOps.OverflowError("cannot fit 'long' into an index-sized integer");
} else if (value * array.__len__() * array.itemsize > SysModule.maxsize) {
throw PythonOps.MemoryError("");
}
return array * intValue;
}
public static array operator *(int value, array array) {
return array * value;
}
public static array operator *(BigInteger value, array array) {
return array * value;
}
public void append(object iterable) {
_data.Append(iterable);
}
internal IntPtr GetArrayAddress() {
return _data.GetAddress();
}
public PythonTuple buffer_info() {
return PythonTuple.MakeTuple(
_data.GetAddress().ToPython(),
_data.Length
);
}
public void byteswap() {
Stream s = ToStream();
byte[] bytes = new byte[s.Length];
s.Read(bytes, 0, bytes.Length);
byte[] tmp = new byte[itemsize];
for (int i = 0; i < bytes.Length; i += itemsize) {
for (int j = 0; j < itemsize; j++) {
tmp[j] = bytes[i + j];
}
for (int j = 0; j < itemsize; j++) {
bytes[i + j] = tmp[itemsize - (j + 1)];
}
}
_data.Clear();
MemoryStream ms = new MemoryStream(bytes);
FromStream(ms);
}
public int count(object x) {
if (x == null) return 0;
return _data.Count(x);
}
public void extend(object iterable) {
array pa = iterable as array;
if (pa != null) {
if (typecode != pa.typecode) {
throw PythonOps.TypeError("cannot extend with different typecode");
}
int l = pa._data.Length;
for (int i = 0; i < l; i++) {
_data.Append(pa._data.GetData(i));
}
return;
}
string str = iterable as string;
if (str != null && _typeCode != 'u') {
fromstring(str);
return;
}
Bytes bytes = iterable as Bytes;
if (bytes != null) {
fromstring(bytes);
return;
}
PythonBuffer buf = iterable as PythonBuffer;
if (buf != null) {
fromstring(buf);
return;
}
IEnumerator ie = PythonOps.GetEnumerator(iterable);
while (ie.MoveNext()) {
append(ie.Current);
}
}
public void fromlist(object iterable) {
IEnumerator ie = PythonOps.GetEnumerator(iterable);
List<object> items = new List<object>();
while (ie.MoveNext()) {
if (!_data.CanStore(ie.Current)) {
throw PythonOps.TypeError("expected {0}, got {1}",
DynamicHelpers.GetPythonTypeFromType(_data.StorageType).Name,
DynamicHelpers.GetPythonType(ie.Current).Name);
}
items.Add(ie.Current);
}
extend(items);
}
public void fromfile(PythonFile f, int n) {
int bytesNeeded = n * itemsize;
string bytes = f.read(bytesNeeded);
if (bytes.Length < bytesNeeded) throw PythonOps.EofError("file not large enough");
fromstring(bytes);
}
public void fromstring([NotNull]Bytes b) {
if ((b.Count % itemsize) != 0) throw PythonOps.ValueError("string length not a multiple of itemsize");
FromStream(new MemoryStream(b._bytes, false));
}
public void fromstring([NotNull]string s) {
if ((s.Length % itemsize) != 0) throw PythonOps.ValueError("string length not a multiple of itemsize");
byte[] bytes = new byte[s.Length];
for (int i = 0; i < bytes.Length; i++) {
bytes[i] = checked((byte)s[i]);
}
MemoryStream ms = new MemoryStream(bytes);
FromStream(ms);
}
public void fromstring([NotNull]PythonBuffer buf) {
if ((buf.Size % itemsize) != 0) throw PythonOps.ValueError("string length not a multiple of itemsize");
FromStream(new MemoryStream(buf.byteCache, false));
}
public void fromunicode(CodeContext/*!*/ context, string s) {
if (s == null) {
throw PythonOps.TypeError("expected string");
} else if (_typeCode != 'u') {
throw PythonOps.ValueError("fromunicode() may only be called on type 'u' arrays");
}
ArrayData<char> data = (ArrayData<char>)_data;
data.EnsureSize(data.Length + s.Length);
for (int i = 0; i < s.Length; i++) {
data.Data[i + data.Length] = s[i];
}
data.Length += s.Length;
}
public int index(object x) {
if (x == null) throw PythonOps.ValueError("got None, expected value");
int res = _data.Index(x);
if (res == -1) throw PythonOps.ValueError("x not found");
return res;
}
public void insert(int i, object x) {
if (i > _data.Length) i = _data.Length;
if (i < 0) i = _data.Length + i;
if (i < 0) i = 0;
_data.Insert(i, x);
}
public int itemsize {
get {
switch (_typeCode) {
case 'c': // char
case 'b': // signed byte
case 'B': // unsigned byte
case 'x': // pad byte
case 's': // null-terminated string
case 'p': // Pascal string
return 1;
case 'u': // unicode char
case 'h': // signed short
case 'H': // unsigned short
return 2;
case 'i': // signed int
case 'I': // unsigned int
case 'l': // signed long
case 'L': // unsigned long
case 'f': // float
return 4;
case 'P': // pointer
return IntPtr.Size;
case 'q': // signed long long
case 'Q': // unsigned long long
case 'd': // double
return 8;
default:
return 0;
}
}
}
public object pop() {
return pop(-1);
}
public object pop(int i) {
i = PythonOps.FixIndex(i, _data.Length);
object res = _data.GetData(i);
_data.RemoveAt(i);
return res;
}
[Python3Warning("array.read() not supported in 3.x; use array.fromfile()")]
public void read(PythonFile f, int n) {
fromfile(f, n);
}
public void remove(object value) {
if (value == null) throw PythonOps.ValueError("got None, expected value");
_data.Remove(value);
}
public void reverse() {
for (int index = 0; index < _data.Length / 2; index++) {
int left = index, right = _data.Length - (index + 1);
Debug.Assert(left != right);
_data.Swap(left, right);
}
}
public virtual object this[int index] {
get {
object val = _data.GetData(PythonOps.FixIndex(index, _data.Length));
switch (_typeCode) {
case 'b': return (int)(sbyte)val;
case 'B': return (int)(byte)val;
case 'c':
case 'u': return new string((char)val, 1);
case 'h': return (int)(short)val;
case 'H': return (int)(ushort)val;
case 'l': return val;
case 'i': return val;
case 'L': return (BigInteger)(uint)val;
case 'I':
return (BigInteger)(uint)val;
case 'f': return (double)(float)val;
case 'd': return val;
default:
throw PythonOps.ValueError("Bad type code (expected one of 'c', 'b', 'B', 'u', 'H', 'h', 'i', 'I', 'l', 'L', 'f', 'd')");
}
}
set {
_data.SetData(PythonOps.FixIndex(index, _data.Length), value);
}
}
internal byte[] RawGetItem(int index) {
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
switch (_typeCode) {
case 'c': bw.Write((byte)(char)_data.GetData(index)); break;
case 'b': bw.Write((sbyte)_data.GetData(index)); break;
case 'B': bw.Write((byte)_data.GetData(index)); break;
case 'u': bw.Write((char)_data.GetData(index)); break;
case 'h': bw.Write((short)_data.GetData(index)); break;
case 'H': bw.Write((ushort)_data.GetData(index)); break;
case 'l':
case 'i': bw.Write((int)_data.GetData(index)); break;
case 'L':
case 'I': bw.Write((uint)_data.GetData(index)); break;
case 'f': bw.Write((float)_data.GetData(index)); break;
case 'd': bw.Write((double)_data.GetData(index)); break;
}
return ms.ToArray();
}
public void __delitem__(int index) {
_data.RemoveAt(PythonOps.FixIndex(index, _data.Length));
}
public void __delitem__(Slice slice) {
if (slice == null) throw PythonOps.TypeError("expected Slice, got None");
int start, stop, step;
// slice is sealed, indices can't be user code...
slice.indices(_data.Length, out start, out stop, out step);
if (step > 0 && (start >= stop)) return;
if (step < 0 && (start <= stop)) return;
if (step == 1) {
int i = start;
for (int j = stop; j < _data.Length; j++, i++) {
_data.SetData(i, _data.GetData(j));
}
for (i = 0; i < stop - start; i++) {
_data.RemoveAt(_data.Length - 1);
}
return;
}
if (step == -1) {
int i = stop + 1;
for (int j = start + 1; j < _data.Length; j++, i++) {
_data.SetData(i, _data.GetData(j));
}
for (i = 0; i < stop - start; i++) {
_data.RemoveAt(_data.Length - 1);
}
return;
}
if (step < 0) {
// find "start" we will skip in the 1,2,3,... order
int i = start;
while (i > stop) {
i += step;
}
i -= step;
// swap start/stop, make step positive
stop = start + 1;
start = i;
step = -step;
}
int curr, skip, move;
// skip: the next position we should skip
// curr: the next position we should fill in data
// move: the next position we will check
curr = skip = move = start;
while (curr < stop && move < stop) {
if (move != skip) {
_data.SetData(curr++, _data.GetData(move));
} else
skip += step;
move++;
}
while (stop < _data.Length) {
_data.SetData(curr++, _data.GetData(stop++));
}
while (_data.Length > curr) {
_data.RemoveAt(_data.Length - 1);
}
}
public object this[Slice index] {
get {
if (index == null) throw PythonOps.TypeError("expected Slice, got None");
int start, stop, step;
index.indices(_data.Length, out start, out stop, out step);
array pa = new array(new string(_typeCode, 1), Missing.Value);
if (step < 0) {
for (int i = start; i > stop; i += step) {
pa._data.Append(_data.GetData(i));
}
} else {
for (int i = start; i < stop; i += step) {
pa._data.Append(_data.GetData(i));
}
}
return pa;
}
set {
if (index == null) throw PythonOps.TypeError("expected Slice, got None");
CheckSliceAssignType(value);
if (index.step != null) {
if (Object.ReferenceEquals(value, this)) value = this.tolist();
index.DoSliceAssign(SliceAssign, _data.Length, value);
} else {
int start, stop, step;
index.indices(_data.Length, out start, out stop, out step);
if (stop < start) {
stop = start;
}
SliceNoStep(value, start, stop);
}
}
}
private void CheckSliceAssignType(object value) {
array pa = value as array;
if (pa == null) {
throw PythonOps.TypeError("can only assign array (not \"{0}\") to array slice", PythonTypeOps.GetName(value));
} else if (pa != null && pa._typeCode != _typeCode) {
throw PythonOps.TypeError("bad argument type for built-in operation");
}
}
private void SliceNoStep(object value, int start, int stop) {
// replace between start & stop w/ values
IEnumerator ie = PythonOps.GetEnumerator(value);
ArrayData newData = CreateData(_typeCode);
for (int i = 0; i < start; i++) {
newData.Append(_data.GetData(i));
}
while (ie.MoveNext()) {
newData.Append(ie.Current);
}
for (int i = Math.Max(stop, start); i < _data.Length; i++) {
newData.Append(_data.GetData(i));
}
_data = newData;
}
public object __getslice__(object start, object stop) {
return this[new Slice(start, stop)];
}
public void __setslice__(int start, int stop, object value) {
CheckSliceAssignType(value);
Slice.FixSliceArguments(_data.Length, ref start, ref stop);
SliceNoStep(value, start, stop);
}
public void __delslice__(object start, object stop) {
__delitem__(new Slice(start, stop));
}
public PythonTuple __reduce__() {
return PythonOps.MakeTuple(
DynamicHelpers.GetPythonType(this),
PythonOps.MakeTuple(
typecode,
tolist()
),
null
);
}
public array __copy__() {
return new array(typecode, this);
}
public array __deepcopy__(array arg) {
// we only have simple data so this is the same as a copy
return arg.__copy__();
}
public PythonTuple __reduce_ex__(int version) {
return __reduce__();
}
public PythonTuple __reduce_ex__() {
return __reduce__();
}
private void SliceAssign(int index, object value) {
_data.SetData(index, value);
}
public void tofile(PythonFile f) {
f.write(tostring());
}
public List tolist() {
List res = new List();
for (int i = 0; i < _data.Length; i++) {
res.AddNoLock(this[i]);
}
return res;
}
public string tostring() {
Stream s = ToStream();
byte[] bytes = new byte[s.Length];
s.Read(bytes, 0, (int)s.Length);
StringBuilder res = new StringBuilder();
for (int i = 0; i < bytes.Length; i++) {
res.Append((char)bytes[i]);
}
return res.ToString();
}
public string tounicode(CodeContext/*!*/ context) {
if (_typeCode != 'u') throw PythonOps.ValueError("only 'u' arrays can be converted to unicode");
return new string(((ArrayData<char>)_data).Data, 0, _data.Length);
}
[Python3Warning("array.write() not supported in 3.x; use array.tofile()")]
public void write(PythonFile f) {
tofile(f);
}
public string/*!*/ typecode {
get { return ScriptingRuntimeHelpers.CharToString(_typeCode); }
}
private abstract class ArrayData {
public abstract void SetData(int index, object value);
public abstract object GetData(int index);
public abstract void Append(object value);
public abstract int Count(object value);
public abstract bool CanStore(object value);
public abstract Type StorageType { get; }
public abstract int Index(object value);
public abstract void Insert(int index, object value);
public abstract void Remove(object value);
public abstract void RemoveAt(int index);
public abstract int Length { get; set; }
public abstract void Swap(int x, int y);
public abstract void Clear();
public abstract IntPtr GetAddress();
public abstract ArrayData Multiply(int count);
}
internal MemoryStream ToStream() {
MemoryStream ms = new MemoryStream();
ToStream(ms);
ms.Seek(0, SeekOrigin.Begin);
return ms;
}
internal void ToStream(Stream ms) {
BinaryWriter bw = new BinaryWriter(ms, Encoding.Unicode);
for (int i = 0; i < _data.Length; i++) {
switch (_typeCode) {
case 'c': bw.Write((byte)(char)_data.GetData(i)); break;
case 'b': bw.Write((sbyte)_data.GetData(i)); break;
case 'B': bw.Write((byte)_data.GetData(i)); break;
case 'u': bw.Write((char)_data.GetData(i)); break;
case 'h': bw.Write((short)_data.GetData(i)); break;
case 'H': bw.Write((ushort)_data.GetData(i)); break;
case 'l':
case 'i': bw.Write((int)_data.GetData(i)); break;
case 'L':
case 'I': bw.Write((uint)_data.GetData(i)); break;
case 'f': bw.Write((float)_data.GetData(i)); break;
case 'd': bw.Write((double)_data.GetData(i)); break;
}
}
}
internal byte[] ToByteArray() {
return ToStream().ToArray();
}
internal void Clear() {
_data = CreateData(_typeCode);
}
internal void FromStream(Stream ms) {
BinaryReader br = new BinaryReader(ms);
for (int i = 0; i < ms.Length / itemsize; i++) {
object value;
switch (_typeCode) {
case 'c': value = (char)br.ReadByte(); break;
case 'b': value = (sbyte)br.ReadByte(); break;
case 'B': value = br.ReadByte(); break;
case 'u': value = ReadBinaryChar(br); break;
case 'h': value = br.ReadInt16(); break;
case 'H': value = br.ReadUInt16(); break;
case 'i': value = br.ReadInt32(); break;
case 'I': value = br.ReadUInt32(); break;
case 'l': value = br.ReadInt32(); break;
case 'L': value = br.ReadUInt32(); break;
case 'f': value = br.ReadSingle(); break;
case 'd': value = br.ReadDouble(); break;
default: throw new InvalidOperationException(); // should never happen
}
_data.Append(value);
}
}
// a version of FromStream that overwrites starting at 'index'
internal void FromStream(Stream ms, int index) {
BinaryReader br = new BinaryReader(ms);
for (int i = index; i < ms.Length / itemsize + index; i++) {
object value;
switch (_typeCode) {
case 'c': value = (char)br.ReadByte(); break;
case 'b': value = (sbyte)br.ReadByte(); break;
case 'B': value = br.ReadByte(); break;
case 'u': value = ReadBinaryChar(br); break;
case 'h': value = br.ReadInt16(); break;
case 'H': value = br.ReadUInt16(); break;
case 'i': value = br.ReadInt32(); break;
case 'I': value = br.ReadUInt32(); break;
case 'l': value = br.ReadInt32(); break;
case 'L': value = br.ReadUInt32(); break;
case 'f': value = br.ReadSingle(); break;
case 'd': value = br.ReadDouble(); break;
default: throw new InvalidOperationException(); // should never happen
}
_data.SetData(i, value);
}
}
// a version of FromStream that overwrites up to 'nbytes' bytes, starting at 'index'
// Returns the number of bytes written.
internal long FromStream(Stream ms, int index, int nbytes) {
BinaryReader br = new BinaryReader(ms);
if (nbytes <= 0) {
return 0;
}
int len = Math.Min((int)(ms.Length - ms.Position), nbytes);
for (int i = index; i < len / itemsize + index; i++) {
object value;
switch (_typeCode) {
case 'c': value = (char)br.ReadByte(); break;
case 'b': value = (sbyte)br.ReadByte(); break;
case 'B': value = br.ReadByte(); break;
case 'u':
value = ReadBinaryChar(br);
break;
case 'h': value = br.ReadInt16(); break;
case 'H': value = br.ReadUInt16(); break;
case 'i': value = br.ReadInt32(); break;
case 'I': value = br.ReadUInt32(); break;
case 'l': value = br.ReadInt32(); break;
case 'L': value = br.ReadUInt32(); break;
case 'f': value = br.ReadSingle(); break;
case 'd': value = br.ReadDouble(); break;
default: throw new InvalidOperationException(); // should never happen
}
_data.SetData(i, value);
}
if (len % itemsize > 0) {
// we have some extra bytes that we need to do a partial read on.
byte[] curBytes = ToBytes(len / itemsize + index);
for (int i = 0; i < len % itemsize; i++) {
curBytes[i] = br.ReadByte();
}
_data.SetData(len / itemsize + index, FromBytes(curBytes));
}
return len;
}
// br.ReadChar() doesn't read 16-bit chars, it reads 8-bit chars.
private static object ReadBinaryChar(BinaryReader br) {
object value;
byte byteVal = br.ReadByte();
value = (char)((br.ReadByte() << 8) | byteVal);
return value;
}
private byte[] ToBytes(int index) {
switch(_typeCode) {
case 'c': return new[] { (byte)(char)_data.GetData(index) };
case 'b': return new[] { (byte)(sbyte)_data.GetData(index) };
case 'B': return new[] { (byte)_data.GetData(index) };
case 'u': return BitConverter.GetBytes((char)_data.GetData(index));
case 'h': return BitConverter.GetBytes((short)_data.GetData(index));
case 'H': return BitConverter.GetBytes((ushort)_data.GetData(index));
case 'l':
case 'i': return BitConverter.GetBytes((int)_data.GetData(index));
case 'L':
case 'I': return BitConverter.GetBytes((uint)_data.GetData(index));
case 'f': return BitConverter.GetBytes((float)_data.GetData(index));
case 'd': return BitConverter.GetBytes((double)_data.GetData(index));
default:
throw PythonOps.ValueError("Bad type code (expected one of 'c', 'b', 'B', 'u', 'H', 'h', 'i', 'I', 'l', 'L', 'f', 'd')");
}
}
private object FromBytes(byte[] bytes) {
switch (_typeCode) {
case 'c': return (char)bytes[0];
case 'b': return (sbyte)bytes[0];
case 'B': return bytes[0];
case 'u': return BitConverter.ToChar(bytes, 0);
case 'h': return BitConverter.ToInt16(bytes, 0);
case 'H': return BitConverter.ToUInt16(bytes, 0);
case 'l':
case 'i': return BitConverter.ToInt32(bytes, 0);
case 'L':
case 'I': return BitConverter.ToUInt32(bytes, 0);
case 'f': return BitConverter.ToSingle(bytes, 0);
case 'd': return BitConverter.ToDouble(bytes, 0);
default:
throw PythonOps.ValueError("Bad type code (expected one of 'c', 'b', 'B', 'u', 'H', 'h', 'i', 'I', 'l', 'L', 'f', 'd')");
}
}
private class ArrayData<T> : ArrayData {
private T[] _data;
private int _count;
private GCHandle? _dataHandle;
public ArrayData() {
GC.SuppressFinalize(this);
_data = new T[8];
}
private ArrayData(int size) {
GC.SuppressFinalize(this);
_data = new T[size];
_count = size;
}
~ArrayData() {
Debug.Assert(_dataHandle.HasValue);
_dataHandle.Value.Free();
}
public T[] Data {
get {
return _data;
}
set {
_data = value;
}
}
public override object GetData(int index) {
return _data[index];
}
public override void SetData(int index, object value) {
_data[index] = GetValue(value);
}
private static T GetValue(object value) {
if (!(value is T)) {
object newVal;
if (!Converter.TryConvert(value, typeof(T), out newVal)) {
if (value != null && typeof(T).IsPrimitive && typeof(T) != typeof(char))
throw PythonOps.OverflowError("couldn't convert {1} to {0}",
DynamicHelpers.GetPythonTypeFromType(typeof(T)).Name,
DynamicHelpers.GetPythonType(value).Name);
throw PythonOps.TypeError("expected {0}, got {1}",
DynamicHelpers.GetPythonTypeFromType(typeof(T)).Name,
DynamicHelpers.GetPythonType(value).Name);
}
value = newVal;
}
return (T)value;
}
public override void Append(object value) {
EnsureSize(_count + 1);
_data[_count++] = GetValue(value);
}
public void EnsureSize(int size) {
if (_data.Length < size) {
Array.Resize(ref _data, _data.Length * 2);
if (_dataHandle != null) {
_dataHandle.Value.Free();
_dataHandle = null;
GC.SuppressFinalize(this);
}
}
}
public override int Count(object value) {
T other = GetValue(value);
int count = 0;
for (int i = 0; i < _count; i++) {
if (_data[i].Equals(other)) {
count++;
}
}
return count;
}
public override void Insert(int index, object value) {
EnsureSize(_count + 1);
if (index < _count) {
Array.Copy(_data, index, _data, index + 1, _count - index);
}
_data[index] = GetValue(value);
_count++;
}
public override int Index(object value) {
T other = GetValue(value);
for (int i = 0; i < _count; i++) {
if (_data[i].Equals(other)) return i;
}
return -1;
}
public override void Remove(object value) {
T other = GetValue(value);
for (int i = 0; i < _count; i++) {
if (_data[i].Equals(other)) {
RemoveAt(i);
return;
}
}
throw PythonOps.ValueError("couldn't find value to remove");
}
public override void RemoveAt(int index) {
_count--;
if (index < _count) {
Array.Copy(_data, index + 1, _data, index, _count - index);
}
}
public override void Swap(int x, int y) {
T temp = _data[x];
_data[x] = _data[y];
_data[y] = temp;
}
public override int Length {
get {
return _count;
}
set {
_count = value;
}
}
public override void Clear() {
_count = 0;
}
public override bool CanStore(object value) {
object tmp;
if (!(value is T) && !Converter.TryConvert(value, typeof(T), out tmp))
return false;
return true;
}
public override Type StorageType {
get { return typeof(T); }
}
public override IntPtr GetAddress() {
// slightly evil to pin our data array but it's only used in rare
// interop cases. If this becomes a problem we can move the allocation
// onto the unmanaged heap if we have full trust via a different subclass
// of ArrayData.
if (!_dataHandle.HasValue) {
_dataHandle = GCHandle.Alloc(_data, GCHandleType.Pinned);
GC.ReRegisterForFinalize(this);
}
return _dataHandle.Value.AddrOfPinnedObject();
}