This repository was archived by the owner on Aug 31, 2021. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 223
Expand file tree
/
Copy pathfoundation-stream.cpp
More file actions
636 lines (518 loc) · 14.5 KB
/
Copy pathfoundation-stream.cpp
File metadata and controls
636 lines (518 loc) · 14.5 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
/* Copyright (C) 2003-2015 LiveCode Ltd.
This file is part of LiveCode.
LiveCode is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License v3 as published by the Free
Software Foundation.
LiveCode is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LiveCode. If not see <http://www.gnu.org/licenses/>. */
#include <foundation.h>
#include <foundation-auto.h>
#include "foundation-private.h"
////////////////////////////////////////////////////////////////////////////////
struct __MCStream
{
const MCStreamCallbacks *callbacks;
};
////////////////////////////////////////////////////////////////////////////////
struct __MCMemoryInputStream
{
const void *buffer;
size_t length;
size_t pointer;
size_t mark;
};
static void __MCMemoryInputStreamDestroy(MCStreamRef p_stream)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
}
static bool __MCMemoryInputStreamIsFinished(MCStreamRef p_stream, bool& r_finished)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
r_finished = self -> pointer == self -> length;
return true;
}
static bool __MCMemoryInputStreamGetAvailableForRead(MCStreamRef p_stream, size_t& r_amount)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
r_amount = self -> length - self -> pointer;
return true;
}
static bool __MCMemoryInputStreamRead(MCStreamRef p_stream, void *p_buffer, size_t p_amount)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
if (p_amount > self -> length - self -> pointer)
return false;
MCMemoryCopy(p_buffer, (byte_t *)self -> buffer + self -> pointer, p_amount);
self -> pointer += p_amount;
return true;
}
static bool __MCMemoryInputStreamSkip(MCStreamRef p_stream, size_t p_amount)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
if (p_amount > self -> length - self -> pointer)
return false;
self -> pointer += p_amount;
return true;
}
static bool __MCMemoryInputStreamMark(MCStreamRef p_stream, size_t p_limit)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
self -> mark = self -> pointer;
return true;
}
static bool __MCMemoryInputStreamReset(MCStreamRef p_stream)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
self -> pointer = self -> mark;
return true;
}
static bool __MCMemoryInputStreamTell(MCStreamRef p_stream, filepos_t& r_position)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
r_position = self -> pointer;
return true;
}
static bool __MCMemoryInputStreamSeek(MCStreamRef p_stream, filepos_t p_position)
{
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(p_stream);
if (p_position < 0 || p_position > self -> length)
return false;
self -> pointer = (size_t)p_position;
return true;
}
static MCStreamCallbacks kMCMemoryInputStreamCallbacks =
{
__MCMemoryInputStreamDestroy,
__MCMemoryInputStreamIsFinished,
__MCMemoryInputStreamGetAvailableForRead,
__MCMemoryInputStreamRead,
nil,
nil,
__MCMemoryInputStreamSkip,
__MCMemoryInputStreamMark,
__MCMemoryInputStreamReset,
__MCMemoryInputStreamTell,
__MCMemoryInputStreamSeek,
};
bool MCMemoryInputStreamCreate(const void *p_block, size_t p_size, MCStreamRef& r_stream)
{
MCAssert(nil != p_block);
MCStreamRef t_stream;
if (!MCStreamCreate(&kMCMemoryInputStreamCallbacks, sizeof(__MCMemoryInputStream), t_stream))
return false;
__MCMemoryInputStream *self;
self = (__MCMemoryInputStream *)MCStreamGetExtraBytesPtr(t_stream);
self -> buffer = p_block;
self -> length = p_size;
self -> mark = 0;
self -> pointer = 0;
r_stream = t_stream;
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool MCMemoryOutputStreamCreate(MCStreamRef& r_stream)
{
return false;
}
bool MCMemoryOutputStreamFinish(MCStreamRef stream, void*& r_buffer, size_t& r_size)
{
return false;
}
////////////////////////////////////////////////////////////////////////////////
static void __MCStreamDestroy(MCValueRef p_value)
{
__MCStream *self;
self = (__MCStream *)MCValueGetExtraBytesPtr(p_value);
self -> callbacks -> destroy(self);
}
static bool __MCStreamCopy(MCValueRef p_value, bool p_release, MCValueRef& r_value)
{
if (!p_release)
MCValueRetain(p_value);
r_value = p_value;
return true;
}
static bool __MCStreamEqual(MCValueRef p_value, MCValueRef p_other_value)
{
return p_value == p_other_value;
}
static hash_t __MCStreamHash(MCValueRef p_value)
{
return (hash_t)p_value;
}
static bool __MCStreamDescribe(MCValueRef p_value, MCStringRef& r_desc)
{
return false;
}
static MCValueCustomCallbacks kMCStreamCustomValueCallbacks =
{
true,
__MCStreamDestroy,
__MCStreamCopy,
__MCStreamEqual,
__MCStreamHash,
__MCStreamDescribe,
};
static inline void __MCAssertIsStream(MCStreamRef ref)
{
__MCValue *val = reinterpret_cast<__MCValue *>(ref);
MCAssert(nil != val &&
__MCValueGetTypeCode(val) == kMCValueTypeCodeCustom &&
__MCValueGetCustomCallbacks(val) == &kMCStreamCustomValueCallbacks);
}
bool MCStreamCreate(const MCStreamCallbacks *p_callbacks, size_t p_extra_bytes, MCStreamRef& r_stream)
{
__MCStream *self;
if (!MCValueCreateCustom(&kMCStreamCustomValueCallbacks, sizeof(__MCStream) + p_extra_bytes, self))
return false;
self -> callbacks = p_callbacks;
r_stream = self;
return true;
}
const MCStreamCallbacks *MCStreamGetCallbacks(MCStreamRef self)
{
__MCAssertIsStream(self);
return self -> callbacks;
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamIsReadable(MCStreamRef self)
{
__MCAssertIsStream(self);
return self -> callbacks -> read != nil;
}
bool MCStreamIsWritable(MCStreamRef self)
{
__MCAssertIsStream(self);
return self -> callbacks -> write != nil;
}
bool MCStreamIsMarkable(MCStreamRef self)
{
__MCAssertIsStream(self);
return self -> callbacks -> mark != nil;
}
bool MCStreamIsSeekable(MCStreamRef self)
{
__MCAssertIsStream(self);
return self -> callbacks -> seek != nil;
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamGetAvailableForRead(MCStreamRef self, size_t& r_available)
{
__MCAssertIsStream(self);
if (self -> callbacks -> get_available_for_read == nil)
return false;
return self -> callbacks -> get_available_for_read(self, r_available);
}
bool MCStreamRead(MCStreamRef self, void *p_buffer, size_t p_amount)
{
__MCAssertIsStream(self);
MCAssert(nil != p_buffer || 0 == p_amount);
if (self -> callbacks -> read == nil)
return false;
return self -> callbacks -> read(self, p_buffer, p_amount);
}
bool MCStreamGetAvailableForWrite(MCStreamRef self, size_t& r_available)
{
__MCAssertIsStream(self);
if (self -> callbacks -> get_available_for_write == nil)
return false;
return self -> callbacks -> get_available_for_write(self, r_available);
}
bool MCStreamWrite(MCStreamRef self, const void *p_buffer, size_t p_amount)
{
__MCAssertIsStream(self);
MCAssert(nil != p_buffer || 0 == p_amount);
if (self -> callbacks -> write == nil)
return false;
return self -> callbacks -> write(self, p_buffer, p_amount);
}
bool MCStreamSkip(MCStreamRef self, size_t p_amount)
{
__MCAssertIsStream(self);
if (self -> callbacks -> skip != nil)
return self -> callbacks -> skip(self, p_amount);
if (self -> callbacks -> seek != nil)
{
filepos_t t_pos;
if (!self -> callbacks -> tell(self, t_pos))
return false;
return self -> callbacks -> seek(self, t_pos + p_amount);
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamMark(MCStreamRef self, size_t p_read_limit)
{
__MCAssertIsStream(self);
if (self -> callbacks -> mark == nil)
return false;
return self -> callbacks -> mark(self, p_read_limit);
}
bool MCStreamReset(MCStreamRef self)
{
__MCAssertIsStream(self);
if (self -> callbacks -> reset == nil)
return false;
return self -> callbacks -> reset(self);
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamTell(MCStreamRef self, filepos_t& r_position)
{
__MCAssertIsStream(self);
if (self -> callbacks -> tell == nil)
return false;
return self -> callbacks -> tell(self, r_position);
}
bool MCStreamSeek(MCStreamRef self, filepos_t p_position)
{
__MCAssertIsStream(self);
if (self -> callbacks -> seek == nil)
return false;
return self -> callbacks -> seek(self, p_position);
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamReadUInt8(MCStreamRef self, uint8_t& r_value)
{
return MCStreamRead(self, &r_value, sizeof(uint8_t));
}
bool MCStreamReadUInt16(MCStreamRef self, uint16_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(uint16_t)))
{
r_value = MCSwapInt16NetworkToHost(r_value);
return true;
}
return false;
}
bool MCStreamReadUInt32(MCStreamRef self, uint32_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(uint32_t)))
{
r_value = MCSwapInt32NetworkToHost(r_value);
return true;
}
return false;
}
bool MCStreamReadUInt64(MCStreamRef self, uint64_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(uint64_t)))
{
r_value = MCSwapInt64NetworkToHost(r_value);
return true;
}
return false;
}
bool MCStreamReadInt8(MCStreamRef self, int8_t& r_value)
{
return MCStreamRead(self, &r_value, sizeof(int8_t));
}
bool MCStreamReadInt16(MCStreamRef self, int16_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(int16_t)))
{
r_value = (int16_t)MCSwapInt16NetworkToHost((uint16_t)r_value);
return true;
}
return false;
}
bool MCStreamReadInt32(MCStreamRef self, int32_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(int32_t)))
{
r_value = (int32_t)MCSwapInt32NetworkToHost((uint32_t)r_value);
return true;
}
return false;
}
bool MCStreamReadInt64(MCStreamRef self, int64_t& r_value)
{
if (MCStreamRead(self, &r_value, sizeof(int64_t)))
{
r_value = (int64_t)MCSwapInt64NetworkToHost((uint64_t)r_value);
return true;
}
return false;
}
bool MCStreamReadCompactUInt32(MCStreamRef stream, uint32_t& r_value);
bool MCStreamReadCompactUInt64(MCStreamRef stream, uint64_t& r_value);
bool MCStreamReadCompactSInt32(MCStreamRef stream, uint32_t& r_value);
bool MCStreamReadCompactSInt64(MCStreamRef stream, uint64_t& r_value);
bool MCStreamReadFloat(MCStreamRef stream, float& r_value);
bool MCStreamReadDouble(MCStreamRef stream, double& r_value)
{
uint64_t t_bits;
if (!MCStreamReadUInt64(stream, t_bits))
return false;
MCMemoryCopy(&r_value, &t_bits, sizeof(uint64_t));
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool MCStreamReadBoolean(MCStreamRef stream, MCBooleanRef& r_boolean)
{
uint8_t t_value;
if (!MCStreamReadUInt8(stream, t_value))
return false;
if (t_value != 0)
r_boolean = MCValueRetain(kMCTrue);
else
r_boolean = MCValueRetain(kMCFalse);
return true;
}
bool MCStreamReadNumber(MCStreamRef stream, MCNumberRef& r_number)
{
uint8_t t_tag;
if (!MCStreamReadUInt8(stream, t_tag))
return false;
if (t_tag == 0)
{
int32_t t_value;
if (!MCStreamReadInt32(stream, t_value))
return false;
return MCNumberCreateWithInteger(t_value, r_number);
}
double t_value;
if (!MCStreamReadDouble(stream, t_value))
return false;
return MCNumberCreateWithReal(t_value, r_number);
}
bool MCStreamReadName(MCStreamRef stream, MCNameRef& r_name)
{
MCStringRef t_string;
if (!MCStreamReadString(stream, t_string))
return false;
return MCNameCreateAndRelease(t_string, r_name);
}
bool MCStreamReadString(MCStreamRef stream, MCStringRef& r_string)
{
uint32_t t_length;
if (!MCStreamReadUInt32(stream, t_length))
return false;
if (t_length == 0)
{
r_string = MCValueRetain(kMCEmptyString);
return true;
}
MCAutoNativeCharArray t_chars;
if (!t_chars . New(t_length))
return false;
if (!MCStreamRead(stream, t_chars . Chars(), t_chars . CharCount()))
return false;
return t_chars . CreateStringAndRelease(r_string);
}
bool MCStreamReadArray(MCStreamRef stream, MCArrayRef& r_array)
{
uint32_t t_count;
if (!MCStreamReadUInt32(stream, t_count))
return false;
if (t_count == 0)
{
r_array = MCValueRetain(kMCEmptyArray);
return true;
}
MCArrayRef t_array;
if (!MCArrayCreateMutable(t_array))
return false;
while(t_count > 0)
{
MCNewAutoNameRef t_name;
if (!MCStreamReadName(stream, &t_name))
break;
MCAutoValueRef t_value;
if (!MCStreamReadValue(stream, &t_value))
break;
if (!MCArrayStoreValue(t_array, true, *t_name, *t_value))
break;
t_count -= 1;
}
if (t_count != 0)
{
MCValueRelease(t_array);
return false;
}
return MCArrayCopyAndRelease(t_array, r_array);
}
bool MCStreamReadSet(MCStreamRef stream, MCSetRef& r_set)
{
uint32_t t_length;
if (!MCStreamReadUInt32(stream, t_length))
return false;
if (t_length == 0)
{
r_set = MCValueRetain(kMCEmptySet);
return true;
}
uindex_t *t_limbs;
if (!MCMemoryNewArray(t_length, t_limbs))
return false;
if (!MCStreamRead(stream, t_limbs, sizeof(uint32_t) * t_length) ||
!MCSetCreateWithLimbsAndRelease(t_limbs, t_length, r_set))
{
MCMemoryDeleteArray(t_limbs);
return false;
}
return true;
}
bool MCStreamReadValue(MCStreamRef stream, MCValueRef& r_value)
{
uint8_t t_tag;
if (!MCStreamReadUInt8(stream, t_tag))
return false;
switch(t_tag)
{
case 0:
r_value = MCValueRetain(kMCNull);
return true;
case 1:
r_value = MCValueRetain(kMCTrue);
return true;
case 2:
r_value = MCValueRetain(kMCFalse);
return true;
case 3:
{
int32_t t_int;
if (!MCStreamReadInt32(stream, t_int))
break;
MCNumberRef t_value;
if (MCNumberCreateWithInteger(t_int, t_value))
return r_value = t_value, true;
break;
}
case 4:
{
MCStringRef t_value;
if (MCStreamReadString(stream, t_value))
return r_value = t_value, true;
break;
}
case 5:
{
MCNameRef t_value;
if (MCStreamReadName(stream, t_value))
return r_value = t_value, true;
break;
}
case 6:
{
MCSetRef t_value;
if (MCStreamReadSet(stream, t_value))
return r_value = t_value, true;
break;
}
}
return false;
}
////////////////////////////////////////////////////////////////////////////////