/src/skia/src/core/SkStream.cpp
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1 | | /* |
2 | | * Copyright 2006 The Android Open Source Project |
3 | | * |
4 | | * Use of this source code is governed by a BSD-style license that can be |
5 | | * found in the LICENSE file. |
6 | | */ |
7 | | |
8 | | #include "include/core/SkStream.h" |
9 | | |
10 | | #include "include/core/SkData.h" |
11 | | #include "include/core/SkString.h" |
12 | | #include "include/core/SkTypes.h" |
13 | | #include "include/private/SkFixed.h" |
14 | | #include "include/private/SkTFitsIn.h" |
15 | | #include "include/private/SkTPin.h" |
16 | | #include "include/private/SkTo.h" |
17 | | #include "src/core/SkOSFile.h" |
18 | | #include "src/core/SkSafeMath.h" |
19 | | #include "src/core/SkStreamPriv.h" |
20 | | |
21 | | #include <limits> |
22 | | |
23 | | /////////////////////////////////////////////////////////////////////////////// |
24 | | |
25 | 2.77k | bool SkStream::readS8(int8_t* i) { |
26 | 2.77k | return this->read(i, sizeof(*i)) == sizeof(*i); |
27 | 2.77k | } |
28 | | |
29 | 40.6k | bool SkStream::readS16(int16_t* i) { |
30 | 40.6k | return this->read(i, sizeof(*i)) == sizeof(*i); |
31 | 40.6k | } |
32 | | |
33 | 41.6M | bool SkStream::readS32(int32_t* i) { |
34 | 41.6M | return this->read(i, sizeof(*i)) == sizeof(*i); |
35 | 41.6M | } |
36 | | |
37 | 137k | bool SkStream::readScalar(SkScalar* i) { |
38 | 137k | return this->read(i, sizeof(*i)) == sizeof(*i); |
39 | 137k | } |
40 | | |
41 | 0 | #define SK_MAX_BYTE_FOR_U8 0xFD |
42 | 1.33M | #define SK_BYTE_SENTINEL_FOR_U16 0xFE |
43 | 1.29M | #define SK_BYTE_SENTINEL_FOR_U32 0xFF |
44 | | |
45 | 484M | bool SkStream::readPackedUInt(size_t* i) { |
46 | 484M | uint8_t byte; |
47 | 484M | if (!this->read(&byte, 1)) { |
48 | 483M | return false; |
49 | 483M | } |
50 | 1.33M | if (SK_BYTE_SENTINEL_FOR_U16 == byte) { |
51 | 40.6k | uint16_t i16; |
52 | 40.6k | if (!this->readU16(&i16)) { return false; } |
53 | 40.6k | *i = i16; |
54 | 1.29M | } else if (SK_BYTE_SENTINEL_FOR_U32 == byte) { |
55 | 44.0k | uint32_t i32; |
56 | 44.0k | if (!this->readU32(&i32)) { return false; } |
57 | 44.0k | *i = i32; |
58 | 1.25M | } else { |
59 | 1.25M | *i = byte; |
60 | 1.25M | } |
61 | 1.33M | return true; |
62 | 1.33M | } |
63 | | |
64 | | ////////////////////////////////////////////////////////////////////////////////////// |
65 | | |
66 | | SkWStream::~SkWStream() |
67 | 160k | { |
68 | 160k | } |
69 | | |
70 | | void SkWStream::flush() |
71 | 6.50k | { |
72 | 6.50k | } |
73 | | |
74 | | bool SkWStream::writeDecAsText(int32_t dec) |
75 | 0 | { |
76 | 0 | char buffer[kSkStrAppendS32_MaxSize]; |
77 | 0 | char* stop = SkStrAppendS32(buffer, dec); |
78 | 0 | return this->write(buffer, stop - buffer); |
79 | 0 | } |
80 | | |
81 | | bool SkWStream::writeBigDecAsText(int64_t dec, int minDigits) |
82 | 0 | { |
83 | 0 | char buffer[kSkStrAppendU64_MaxSize]; |
84 | 0 | char* stop = SkStrAppendU64(buffer, dec, minDigits); |
85 | 0 | return this->write(buffer, stop - buffer); |
86 | 0 | } |
87 | | |
88 | | bool SkWStream::writeHexAsText(uint32_t hex, int digits) |
89 | 0 | { |
90 | 0 | SkString tmp; |
91 | 0 | tmp.appendHex(hex, digits); |
92 | 0 | return this->write(tmp.c_str(), tmp.size()); |
93 | 0 | } |
94 | | |
95 | | bool SkWStream::writeScalarAsText(SkScalar value) |
96 | 2.64M | { |
97 | 2.64M | char buffer[kSkStrAppendScalar_MaxSize]; |
98 | 2.64M | char* stop = SkStrAppendScalar(buffer, value); |
99 | 2.64M | return this->write(buffer, stop - buffer); |
100 | 2.64M | } |
101 | | |
102 | 0 | bool SkWStream::writeScalar(SkScalar value) { |
103 | 0 | return this->write(&value, sizeof(value)); |
104 | 0 | } |
105 | | |
106 | 0 | int SkWStream::SizeOfPackedUInt(size_t value) { |
107 | 0 | if (value <= SK_MAX_BYTE_FOR_U8) { |
108 | 0 | return 1; |
109 | 0 | } else if (value <= 0xFFFF) { |
110 | 0 | return 3; |
111 | 0 | } |
112 | 0 | return 5; |
113 | 0 | } |
114 | | |
115 | 0 | bool SkWStream::writePackedUInt(size_t value) { |
116 | 0 | uint8_t data[5]; |
117 | 0 | size_t len = 1; |
118 | 0 | if (value <= SK_MAX_BYTE_FOR_U8) { |
119 | 0 | data[0] = value; |
120 | 0 | len = 1; |
121 | 0 | } else if (value <= 0xFFFF) { |
122 | 0 | uint16_t value16 = value; |
123 | 0 | data[0] = SK_BYTE_SENTINEL_FOR_U16; |
124 | 0 | memcpy(&data[1], &value16, 2); |
125 | 0 | len = 3; |
126 | 0 | } else { |
127 | 0 | uint32_t value32 = SkToU32(value); |
128 | 0 | data[0] = SK_BYTE_SENTINEL_FOR_U32; |
129 | 0 | memcpy(&data[1], &value32, 4); |
130 | 0 | len = 5; |
131 | 0 | } |
132 | 0 | return this->write(data, len); |
133 | 0 | } |
134 | | |
135 | 0 | bool SkWStream::writeStream(SkStream* stream, size_t length) { |
136 | 0 | char scratch[1024]; |
137 | 0 | const size_t MAX = sizeof(scratch); |
138 | |
|
139 | 0 | while (length != 0) { |
140 | 0 | size_t n = length; |
141 | 0 | if (n > MAX) { |
142 | 0 | n = MAX; |
143 | 0 | } |
144 | 0 | stream->read(scratch, n); |
145 | 0 | if (!this->write(scratch, n)) { |
146 | 0 | return false; |
147 | 0 | } |
148 | 0 | length -= n; |
149 | 0 | } |
150 | 0 | return true; |
151 | 0 | } |
152 | | |
153 | | /////////////////////////////////////////////////////////////////////////////// |
154 | | |
155 | | SkFILEStream::SkFILEStream(std::shared_ptr<FILE> file, size_t end, size_t start, size_t current) |
156 | | : fFILE(std::move(file)) |
157 | | , fEnd(end) |
158 | | , fStart(std::min(start, fEnd)) |
159 | | , fCurrent(SkTPin(current, fStart, fEnd)) |
160 | 0 | { |
161 | 0 | SkASSERT(fStart == start); |
162 | 0 | SkASSERT(fCurrent == current); |
163 | 0 | } Unexecuted instantiation: SkFILEStream::SkFILEStream(std::__1::shared_ptr<_IO_FILE>, unsigned long, unsigned long, unsigned long) Unexecuted instantiation: SkFILEStream::SkFILEStream(std::__1::shared_ptr<_IO_FILE>, unsigned long, unsigned long, unsigned long) |
164 | | |
165 | | SkFILEStream::SkFILEStream(std::shared_ptr<FILE> file, size_t end, size_t start) |
166 | | : SkFILEStream(std::move(file), end, start, start) |
167 | 0 | { } |
168 | | |
169 | | SkFILEStream::SkFILEStream(FILE* file, size_t size, size_t start) |
170 | | : SkFILEStream(std::shared_ptr<FILE>(file, sk_fclose), SkSafeMath::Add(start, size), start) |
171 | 0 | { } |
172 | | |
173 | | SkFILEStream::SkFILEStream(FILE* file, size_t size) |
174 | | : SkFILEStream(file, size, file ? sk_ftell(file) : 0) |
175 | 0 | { } |
176 | | |
177 | | SkFILEStream::SkFILEStream(FILE* file) |
178 | | : SkFILEStream(std::shared_ptr<FILE>(file, sk_fclose), |
179 | | file ? sk_fgetsize(file) : 0, |
180 | | file ? sk_ftell(file) : 0) |
181 | 0 | { } |
182 | | |
183 | | SkFILEStream::SkFILEStream(const char path[]) |
184 | | : SkFILEStream(path ? sk_fopen(path, kRead_SkFILE_Flag) : nullptr) |
185 | 0 | { } |
186 | | |
187 | 0 | SkFILEStream::~SkFILEStream() { |
188 | 0 | this->close(); |
189 | 0 | } |
190 | | |
191 | 0 | void SkFILEStream::close() { |
192 | 0 | fFILE.reset(); |
193 | 0 | fEnd = 0; |
194 | 0 | fStart = 0; |
195 | 0 | fCurrent = 0; |
196 | 0 | } |
197 | | |
198 | 0 | size_t SkFILEStream::read(void* buffer, size_t size) { |
199 | 0 | if (size > fEnd - fCurrent) { |
200 | 0 | size = fEnd - fCurrent; |
201 | 0 | } |
202 | 0 | size_t bytesRead = size; |
203 | 0 | if (buffer) { |
204 | 0 | bytesRead = sk_qread(fFILE.get(), buffer, size, fCurrent); |
205 | 0 | } |
206 | 0 | if (bytesRead == SIZE_MAX) { |
207 | 0 | return 0; |
208 | 0 | } |
209 | 0 | fCurrent += bytesRead; |
210 | 0 | return bytesRead; |
211 | 0 | } |
212 | | |
213 | 0 | bool SkFILEStream::isAtEnd() const { |
214 | 0 | if (fCurrent == fEnd) { |
215 | 0 | return true; |
216 | 0 | } |
217 | 0 | return fCurrent >= sk_fgetsize(fFILE.get()); |
218 | 0 | } |
219 | | |
220 | 0 | bool SkFILEStream::rewind() { |
221 | 0 | fCurrent = fStart; |
222 | 0 | return true; |
223 | 0 | } |
224 | | |
225 | 0 | SkStreamAsset* SkFILEStream::onDuplicate() const { |
226 | 0 | return new SkFILEStream(fFILE, fEnd, fStart, fStart); |
227 | 0 | } |
228 | | |
229 | 0 | size_t SkFILEStream::getPosition() const { |
230 | 0 | SkASSERT(fCurrent >= fStart); |
231 | 0 | return fCurrent - fStart; |
232 | 0 | } Unexecuted instantiation: SkFILEStream::getPosition() const Unexecuted instantiation: SkFILEStream::getPosition() const |
233 | | |
234 | 0 | bool SkFILEStream::seek(size_t position) { |
235 | 0 | fCurrent = std::min(SkSafeMath::Add(position, fStart), fEnd); |
236 | 0 | return true; |
237 | 0 | } |
238 | | |
239 | 0 | bool SkFILEStream::move(long offset) { |
240 | 0 | if (offset < 0) { |
241 | 0 | if (offset == std::numeric_limits<long>::min() || |
242 | 0 | !SkTFitsIn<size_t>(-offset) || |
243 | 0 | (size_t) (-offset) >= this->getPosition()) |
244 | 0 | { |
245 | 0 | fCurrent = fStart; |
246 | 0 | } else { |
247 | 0 | fCurrent += offset; |
248 | 0 | } |
249 | 0 | } else if (!SkTFitsIn<size_t>(offset)) { |
250 | 0 | fCurrent = fEnd; |
251 | 0 | } else { |
252 | 0 | fCurrent = std::min(SkSafeMath::Add(fCurrent, (size_t) offset), fEnd); |
253 | 0 | } |
254 | |
|
255 | 0 | SkASSERT(fCurrent >= fStart && fCurrent <= fEnd); |
256 | 0 | return true; |
257 | 0 | } Unexecuted instantiation: SkFILEStream::move(long) Unexecuted instantiation: SkFILEStream::move(long) |
258 | | |
259 | 0 | SkStreamAsset* SkFILEStream::onFork() const { |
260 | 0 | return new SkFILEStream(fFILE, fEnd, fStart, fCurrent); |
261 | 0 | } |
262 | | |
263 | 0 | size_t SkFILEStream::getLength() const { |
264 | 0 | return fEnd - fStart; |
265 | 0 | } |
266 | | |
267 | | /////////////////////////////////////////////////////////////////////////////// |
268 | | |
269 | 18.7k | static sk_sp<SkData> newFromParams(const void* src, size_t size, bool copyData) { |
270 | 18.7k | if (copyData) { |
271 | 0 | return SkData::MakeWithCopy(src, size); |
272 | 18.7k | } else { |
273 | 18.7k | return SkData::MakeWithoutCopy(src, size); |
274 | 18.7k | } |
275 | 18.7k | } |
276 | | |
277 | 0 | SkMemoryStream::SkMemoryStream() { |
278 | 0 | fData = SkData::MakeEmpty(); |
279 | 0 | fOffset = 0; |
280 | 0 | } |
281 | | |
282 | 0 | SkMemoryStream::SkMemoryStream(size_t size) { |
283 | 0 | fData = SkData::MakeUninitialized(size); |
284 | 0 | fOffset = 0; |
285 | 0 | } |
286 | | |
287 | 18.7k | SkMemoryStream::SkMemoryStream(const void* src, size_t size, bool copyData) { |
288 | 18.7k | fData = newFromParams(src, size, copyData); |
289 | 18.7k | fOffset = 0; |
290 | 18.7k | } |
291 | | |
292 | 84.4k | SkMemoryStream::SkMemoryStream(sk_sp<SkData> data) : fData(std::move(data)) { |
293 | 84.4k | if (nullptr == fData) { |
294 | 0 | fData = SkData::MakeEmpty(); |
295 | 0 | } |
296 | 84.4k | fOffset = 0; |
297 | 84.4k | } |
298 | | |
299 | 0 | std::unique_ptr<SkMemoryStream> SkMemoryStream::MakeCopy(const void* data, size_t length) { |
300 | 0 | return std::make_unique<SkMemoryStream>(data, length, true); |
301 | 0 | } |
302 | | |
303 | 0 | std::unique_ptr<SkMemoryStream> SkMemoryStream::MakeDirect(const void* data, size_t length) { |
304 | 0 | return std::make_unique<SkMemoryStream>(data, length, false); |
305 | 0 | } |
306 | | |
307 | 50.2k | std::unique_ptr<SkMemoryStream> SkMemoryStream::Make(sk_sp<SkData> data) { |
308 | 50.2k | return std::make_unique<SkMemoryStream>(std::move(data)); |
309 | 50.2k | } |
310 | | |
311 | 0 | void SkMemoryStream::setMemoryOwned(const void* src, size_t size) { |
312 | 0 | fData = SkData::MakeFromMalloc(src, size); |
313 | 0 | fOffset = 0; |
314 | 0 | } |
315 | | |
316 | 0 | void SkMemoryStream::setMemory(const void* src, size_t size, bool copyData) { |
317 | 0 | fData = newFromParams(src, size, copyData); |
318 | 0 | fOffset = 0; |
319 | 0 | } |
320 | | |
321 | 0 | void SkMemoryStream::setData(sk_sp<SkData> data) { |
322 | 0 | if (nullptr == data) { |
323 | 0 | fData = SkData::MakeEmpty(); |
324 | 0 | } else { |
325 | 0 | fData = data; |
326 | 0 | } |
327 | 0 | fOffset = 0; |
328 | 0 | } |
329 | | |
330 | 0 | void SkMemoryStream::skipToAlign4() { |
331 | | // cast to remove unary-minus warning |
332 | 0 | fOffset += -(int)fOffset & 0x03; |
333 | 0 | } |
334 | | |
335 | 532M | size_t SkMemoryStream::read(void* buffer, size_t size) { |
336 | 532M | size_t dataSize = fData->size(); |
337 | | |
338 | 532M | if (size > dataSize - fOffset) { |
339 | 483M | size = dataSize - fOffset; |
340 | 483M | } |
341 | 532M | if (buffer) { |
342 | 532M | memcpy(buffer, fData->bytes() + fOffset, size); |
343 | 532M | } |
344 | 532M | fOffset += size; |
345 | 532M | return size; |
346 | 532M | } |
347 | | |
348 | 30.4k | size_t SkMemoryStream::peek(void* buffer, size_t size) const { |
349 | 30.4k | SkASSERT(buffer != nullptr); |
350 | | |
351 | 30.4k | const size_t currentOffset = fOffset; |
352 | 30.4k | SkMemoryStream* nonConstThis = const_cast<SkMemoryStream*>(this); |
353 | 30.4k | const size_t bytesRead = nonConstThis->read(buffer, size); |
354 | 30.4k | nonConstThis->fOffset = currentOffset; |
355 | 30.4k | return bytesRead; |
356 | 30.4k | } |
357 | | |
358 | 58.9k | bool SkMemoryStream::isAtEnd() const { |
359 | 58.9k | return fOffset == fData->size(); |
360 | 58.9k | } |
361 | | |
362 | 18.6k | bool SkMemoryStream::rewind() { |
363 | 18.6k | fOffset = 0; |
364 | 18.6k | return true; |
365 | 18.6k | } |
366 | | |
367 | 6.64k | SkMemoryStream* SkMemoryStream::onDuplicate() const { |
368 | 6.64k | return new SkMemoryStream(fData); |
369 | 6.64k | } |
370 | | |
371 | 13.7k | size_t SkMemoryStream::getPosition() const { |
372 | 13.7k | return fOffset; |
373 | 13.7k | } |
374 | | |
375 | 4.76M | bool SkMemoryStream::seek(size_t position) { |
376 | 4.76M | fOffset = position > fData->size() |
377 | 881 | ? fData->size() |
378 | 4.76M | : position; |
379 | 4.76M | return true; |
380 | 4.76M | } |
381 | | |
382 | 0 | bool SkMemoryStream::move(long offset) { |
383 | 0 | return this->seek(fOffset + offset); |
384 | 0 | } |
385 | | |
386 | 0 | SkMemoryStream* SkMemoryStream::onFork() const { |
387 | 0 | std::unique_ptr<SkMemoryStream> that(this->duplicate()); |
388 | 0 | that->seek(fOffset); |
389 | 0 | return that.release(); |
390 | 0 | } |
391 | | |
392 | 42.9k | size_t SkMemoryStream::getLength() const { |
393 | 42.9k | return fData->size(); |
394 | 42.9k | } |
395 | | |
396 | 38.4k | const void* SkMemoryStream::getMemoryBase() { |
397 | 38.4k | return fData->data(); |
398 | 38.4k | } |
399 | | |
400 | 0 | const void* SkMemoryStream::getAtPos() { |
401 | 0 | return fData->bytes() + fOffset; |
402 | 0 | } |
403 | | |
404 | | ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
405 | | ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
406 | | |
407 | | SkFILEWStream::SkFILEWStream(const char path[]) |
408 | 0 | { |
409 | 0 | fFILE = sk_fopen(path, kWrite_SkFILE_Flag); |
410 | 0 | } |
411 | | |
412 | | SkFILEWStream::~SkFILEWStream() |
413 | 0 | { |
414 | 0 | if (fFILE) { |
415 | 0 | sk_fclose(fFILE); |
416 | 0 | } |
417 | 0 | } |
418 | | |
419 | 0 | size_t SkFILEWStream::bytesWritten() const { |
420 | 0 | return sk_ftell(fFILE); |
421 | 0 | } |
422 | | |
423 | | bool SkFILEWStream::write(const void* buffer, size_t size) |
424 | 0 | { |
425 | 0 | if (fFILE == nullptr) { |
426 | 0 | return false; |
427 | 0 | } |
428 | | |
429 | 0 | if (sk_fwrite(buffer, size, fFILE) != size) |
430 | 0 | { |
431 | 0 | SkDEBUGCODE(SkDebugf("SkFILEWStream failed writing %zu bytes\n", size);) |
432 | 0 | sk_fclose(fFILE); |
433 | 0 | fFILE = nullptr; |
434 | 0 | return false; |
435 | 0 | } |
436 | 0 | return true; |
437 | 0 | } Unexecuted instantiation: SkFILEWStream::write(void const*, unsigned long) Unexecuted instantiation: SkFILEWStream::write(void const*, unsigned long) |
438 | | |
439 | | void SkFILEWStream::flush() |
440 | 0 | { |
441 | 0 | if (fFILE) { |
442 | 0 | sk_fflush(fFILE); |
443 | 0 | } |
444 | 0 | } |
445 | | |
446 | | void SkFILEWStream::fsync() |
447 | 0 | { |
448 | 0 | flush(); |
449 | 0 | if (fFILE) { |
450 | 0 | sk_fsync(fFILE); |
451 | 0 | } |
452 | 0 | } |
453 | | |
454 | | //////////////////////////////////////////////////////////////////////// |
455 | | |
456 | 366M | static inline void sk_memcpy_4bytes(void* dst, const void* src, size_t size) { |
457 | 366M | if (size == 4) { |
458 | 11.4M | memcpy(dst, src, 4); |
459 | 354M | } else { |
460 | 354M | memcpy(dst, src, size); |
461 | 354M | } |
462 | 366M | } |
463 | | |
464 | 547k | #define SkDynamicMemoryWStream_MinBlockSize 4096 |
465 | | |
466 | | struct SkDynamicMemoryWStream::Block { |
467 | | Block* fNext; |
468 | | char* fCurr; |
469 | | char* fStop; |
470 | | |
471 | 1.03M | const char* start() const { return (const char*)(this + 1); } |
472 | 1.58M | char* start() { return (char*)(this + 1); } |
473 | 731M | size_t avail() const { return fStop - fCurr; } |
474 | 1.03M | size_t written() const { return fCurr - this->start(); } |
475 | | |
476 | 547k | void init(size_t size) { |
477 | 547k | fNext = nullptr; |
478 | 547k | fCurr = this->start(); |
479 | 547k | fStop = this->start() + size; |
480 | 547k | } |
481 | | |
482 | 366M | const void* append(const void* data, size_t size) { |
483 | 366M | SkASSERT((size_t)(fStop - fCurr) >= size); |
484 | 366M | sk_memcpy_4bytes(fCurr, data, size); |
485 | 366M | fCurr += size; |
486 | 366M | return (const void*)((const char*)data + size); |
487 | 366M | } SkDynamicMemoryWStream::Block::append(void const*, unsigned long) Line | Count | Source | 482 | 362M | const void* append(const void* data, size_t size) { | 483 | 362M | SkASSERT((size_t)(fStop - fCurr) >= size); | 484 | 362M | sk_memcpy_4bytes(fCurr, data, size); | 485 | 362M | fCurr += size; | 486 | 362M | return (const void*)((const char*)data + size); | 487 | 362M | } |
SkDynamicMemoryWStream::Block::append(void const*, unsigned long) Line | Count | Source | 482 | 3.44M | const void* append(const void* data, size_t size) { | 483 | 3.44M | SkASSERT((size_t)(fStop - fCurr) >= size); | 484 | 3.44M | sk_memcpy_4bytes(fCurr, data, size); | 485 | 3.44M | fCurr += size; | 486 | 3.44M | return (const void*)((const char*)data + size); | 487 | 3.44M | } |
|
488 | | }; |
489 | | |
490 | | SkDynamicMemoryWStream::SkDynamicMemoryWStream(SkDynamicMemoryWStream&& other) |
491 | | : fHead(other.fHead) |
492 | | , fTail(other.fTail) |
493 | | , fBytesWrittenBeforeTail(other.fBytesWrittenBeforeTail) |
494 | 0 | { |
495 | 0 | other.fHead = nullptr; |
496 | 0 | other.fTail = nullptr; |
497 | 0 | other.fBytesWrittenBeforeTail = 0; |
498 | 0 | } |
499 | | |
500 | 0 | SkDynamicMemoryWStream& SkDynamicMemoryWStream::operator=(SkDynamicMemoryWStream&& other) { |
501 | 0 | if (this != &other) { |
502 | 0 | this->~SkDynamicMemoryWStream(); |
503 | 0 | new (this) SkDynamicMemoryWStream(std::move(other)); |
504 | 0 | } |
505 | 0 | return *this; |
506 | 0 | } |
507 | | |
508 | 147k | SkDynamicMemoryWStream::~SkDynamicMemoryWStream() { |
509 | 147k | this->reset(); |
510 | 147k | } |
511 | | |
512 | 149k | void SkDynamicMemoryWStream::reset() { |
513 | 149k | Block* block = fHead; |
514 | 615k | while (block != nullptr) { |
515 | 465k | Block* next = block->fNext; |
516 | 465k | sk_free(block); |
517 | 465k | block = next; |
518 | 465k | } |
519 | 149k | fHead = fTail = nullptr; |
520 | 149k | fBytesWrittenBeforeTail = 0; |
521 | 149k | } |
522 | | |
523 | 139k | size_t SkDynamicMemoryWStream::bytesWritten() const { |
524 | 139k | this->validate(); |
525 | | |
526 | 139k | if (fTail) { |
527 | 59.8k | return fBytesWrittenBeforeTail + fTail->written(); |
528 | 59.8k | } |
529 | 80.0k | return 0; |
530 | 80.0k | } |
531 | | |
532 | 365M | bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) { |
533 | 365M | if (count > 0) { |
534 | 365M | SkASSERT(buffer); |
535 | 365M | size_t size; |
536 | | |
537 | 365M | if (fTail) { |
538 | 365M | if (fTail->avail() > 0) { |
539 | 365M | size = std::min(fTail->avail(), count); |
540 | 365M | buffer = fTail->append(buffer, size); |
541 | 365M | SkASSERT(count >= size); |
542 | 365M | count -= size; |
543 | 365M | if (count == 0) { |
544 | 365M | return true; |
545 | 365M | } |
546 | 469k | } |
547 | | // If we get here, we've just exhausted fTail, so update our tracker |
548 | 469k | fBytesWrittenBeforeTail += fTail->written(); |
549 | 469k | } |
550 | | |
551 | 547k | size = std::max<size_t>(count, SkDynamicMemoryWStream_MinBlockSize - sizeof(Block)); |
552 | 547k | size = SkAlign4(size); // ensure we're always a multiple of 4 (see padToAlign4()) |
553 | | |
554 | 547k | Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); |
555 | 547k | block->init(size); |
556 | 547k | block->append(buffer, count); |
557 | | |
558 | 547k | if (fTail != nullptr) { |
559 | 469k | fTail->fNext = block; |
560 | 77.3k | } else { |
561 | 77.3k | fHead = fTail = block; |
562 | 77.3k | } |
563 | 547k | fTail = block; |
564 | 547k | this->validate(); |
565 | 547k | } |
566 | 587k | return true; |
567 | 365M | } SkDynamicMemoryWStream::write(void const*, unsigned long) Line | Count | Source | 532 | 362M | bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) { | 533 | 362M | if (count > 0) { | 534 | 362M | SkASSERT(buffer); | 535 | 362M | size_t size; | 536 | | | 537 | 362M | if (fTail) { | 538 | 362M | if (fTail->avail() > 0) { | 539 | 362M | size = std::min(fTail->avail(), count); | 540 | 362M | buffer = fTail->append(buffer, size); | 541 | 362M | SkASSERT(count >= size); | 542 | 362M | count -= size; | 543 | 362M | if (count == 0) { | 544 | 361M | return true; | 545 | 361M | } | 546 | 466k | } | 547 | | // If we get here, we've just exhausted fTail, so update our tracker | 548 | 466k | fBytesWrittenBeforeTail += fTail->written(); | 549 | 466k | } | 550 | | | 551 | 503k | size = std::max<size_t>(count, SkDynamicMemoryWStream_MinBlockSize - sizeof(Block)); | 552 | 503k | size = SkAlign4(size); // ensure we're always a multiple of 4 (see padToAlign4()) | 553 | | | 554 | 503k | Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); | 555 | 503k | block->init(size); | 556 | 503k | block->append(buffer, count); | 557 | | | 558 | 503k | if (fTail != nullptr) { | 559 | 466k | fTail->fNext = block; | 560 | 37.4k | } else { | 561 | 37.4k | fHead = fTail = block; | 562 | 37.4k | } | 563 | 503k | fTail = block; | 564 | 503k | this->validate(); | 565 | 503k | } | 566 | 504k | return true; | 567 | 362M | } |
SkDynamicMemoryWStream::write(void const*, unsigned long) Line | Count | Source | 532 | 3.47M | bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) { | 533 | 3.47M | if (count > 0) { | 534 | 3.43M | SkASSERT(buffer); | 535 | 3.43M | size_t size; | 536 | | | 537 | 3.43M | if (fTail) { | 538 | 3.39M | if (fTail->avail() > 0) { | 539 | 3.39M | size = std::min(fTail->avail(), count); | 540 | 3.39M | buffer = fTail->append(buffer, size); | 541 | 3.39M | SkASSERT(count >= size); | 542 | 3.39M | count -= size; | 543 | 3.39M | if (count == 0) { | 544 | 3.39M | return true; | 545 | 3.39M | } | 546 | 3.16k | } | 547 | | // If we get here, we've just exhausted fTail, so update our tracker | 548 | 3.16k | fBytesWrittenBeforeTail += fTail->written(); | 549 | 3.16k | } | 550 | | | 551 | 43.0k | size = std::max<size_t>(count, SkDynamicMemoryWStream_MinBlockSize - sizeof(Block)); | 552 | 43.0k | size = SkAlign4(size); // ensure we're always a multiple of 4 (see padToAlign4()) | 553 | | | 554 | 43.0k | Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); | 555 | 43.0k | block->init(size); | 556 | 43.0k | block->append(buffer, count); | 557 | | | 558 | 43.0k | if (fTail != nullptr) { | 559 | 3.16k | fTail->fNext = block; | 560 | 39.9k | } else { | 561 | 39.9k | fHead = fTail = block; | 562 | 39.9k | } | 563 | 43.0k | fTail = block; | 564 | 43.0k | this->validate(); | 565 | 43.0k | } | 566 | 82.2k | return true; | 567 | 3.47M | } |
|
568 | | |
569 | 0 | bool SkDynamicMemoryWStream::writeToAndReset(SkDynamicMemoryWStream* dst) { |
570 | 0 | SkASSERT(dst); |
571 | 0 | SkASSERT(dst != this); |
572 | 0 | if (0 == this->bytesWritten()) { |
573 | 0 | return true; |
574 | 0 | } |
575 | 0 | if (0 == dst->bytesWritten()) { |
576 | 0 | *dst = std::move(*this); |
577 | 0 | return true; |
578 | 0 | } |
579 | 0 | dst->fTail->fNext = fHead; |
580 | 0 | dst->fBytesWrittenBeforeTail += fBytesWrittenBeforeTail + dst->fTail->written(); |
581 | 0 | dst->fTail = fTail; |
582 | 0 | fHead = fTail = nullptr; |
583 | 0 | fBytesWrittenBeforeTail = 0; |
584 | 0 | return true; |
585 | 0 | } Unexecuted instantiation: SkDynamicMemoryWStream::writeToAndReset(SkDynamicMemoryWStream*) Unexecuted instantiation: SkDynamicMemoryWStream::writeToAndReset(SkDynamicMemoryWStream*) |
586 | | |
587 | 0 | void SkDynamicMemoryWStream::prependToAndReset(SkDynamicMemoryWStream* dst) { |
588 | 0 | SkASSERT(dst); |
589 | 0 | SkASSERT(dst != this); |
590 | 0 | if (0 == this->bytesWritten()) { |
591 | 0 | return; |
592 | 0 | } |
593 | 0 | if (0 == dst->bytesWritten()) { |
594 | 0 | *dst = std::move(*this); |
595 | 0 | return; |
596 | 0 | } |
597 | 0 | fTail->fNext = dst->fHead; |
598 | 0 | dst->fHead = fHead; |
599 | 0 | dst->fBytesWrittenBeforeTail += fBytesWrittenBeforeTail + fTail->written(); |
600 | 0 | fHead = fTail = nullptr; |
601 | 0 | fBytesWrittenBeforeTail = 0; |
602 | 0 | return; |
603 | 0 | } Unexecuted instantiation: SkDynamicMemoryWStream::prependToAndReset(SkDynamicMemoryWStream*) Unexecuted instantiation: SkDynamicMemoryWStream::prependToAndReset(SkDynamicMemoryWStream*) |
604 | | |
605 | | |
606 | 0 | bool SkDynamicMemoryWStream::read(void* buffer, size_t offset, size_t count) { |
607 | 0 | if (offset + count > this->bytesWritten()) { |
608 | 0 | return false; // test does not partially modify |
609 | 0 | } |
610 | 0 | Block* block = fHead; |
611 | 0 | while (block != nullptr) { |
612 | 0 | size_t size = block->written(); |
613 | 0 | if (offset < size) { |
614 | 0 | size_t part = offset + count > size ? size - offset : count; |
615 | 0 | memcpy(buffer, block->start() + offset, part); |
616 | 0 | if (count <= part) { |
617 | 0 | return true; |
618 | 0 | } |
619 | 0 | count -= part; |
620 | 0 | buffer = (void*) ((char* ) buffer + part); |
621 | 0 | } |
622 | 0 | offset = offset > size ? offset - size : 0; |
623 | 0 | block = block->fNext; |
624 | 0 | } |
625 | 0 | return false; |
626 | 0 | } |
627 | | |
628 | 7.51k | void SkDynamicMemoryWStream::copyTo(void* dst) const { |
629 | 7.51k | SkASSERT(dst); |
630 | 7.51k | Block* block = fHead; |
631 | 418k | while (block != nullptr) { |
632 | 411k | size_t size = block->written(); |
633 | 411k | memcpy(dst, block->start(), size); |
634 | 411k | dst = (void*)((char*)dst + size); |
635 | 411k | block = block->fNext; |
636 | 411k | } |
637 | 7.51k | } |
638 | | |
639 | 0 | bool SkDynamicMemoryWStream::writeToStream(SkWStream* dst) const { |
640 | 0 | SkASSERT(dst); |
641 | 0 | for (Block* block = fHead; block != nullptr; block = block->fNext) { |
642 | 0 | if (!dst->write(block->start(), block->written())) { |
643 | 0 | return false; |
644 | 0 | } |
645 | 0 | } |
646 | 0 | return true; |
647 | 0 | } Unexecuted instantiation: SkDynamicMemoryWStream::writeToStream(SkWStream*) const Unexecuted instantiation: SkDynamicMemoryWStream::writeToStream(SkWStream*) const |
648 | | |
649 | 0 | void SkDynamicMemoryWStream::padToAlign4() { |
650 | | // The contract is to write zeros until the entire stream has written a multiple of 4 bytes. |
651 | | // Our Blocks are guaranteed always be (a) full (except the tail) and (b) a multiple of 4 |
652 | | // so it is sufficient to just examine the tail (if present). |
653 | |
|
654 | 0 | if (fTail) { |
655 | | // cast to remove unary-minus warning |
656 | 0 | int padBytes = -(int)fTail->written() & 0x03; |
657 | 0 | if (padBytes) { |
658 | 0 | int zero = 0; |
659 | 0 | fTail->append(&zero, padBytes); |
660 | 0 | } |
661 | 0 | } |
662 | 0 | } |
663 | | |
664 | | |
665 | 54.9k | void SkDynamicMemoryWStream::copyToAndReset(void* ptr) { |
666 | 54.9k | if (!ptr) { |
667 | 0 | this->reset(); |
668 | 0 | return; |
669 | 0 | } |
670 | | // By looping through the source and freeing as we copy, we |
671 | | // can reduce real memory use with large streams. |
672 | 54.9k | char* dst = reinterpret_cast<char*>(ptr); |
673 | 54.9k | Block* block = fHead; |
674 | 136k | while (block != nullptr) { |
675 | 81.3k | size_t len = block->written(); |
676 | 81.3k | memcpy(dst, block->start(), len); |
677 | 81.3k | dst += len; |
678 | 81.3k | Block* next = block->fNext; |
679 | 81.3k | sk_free(block); |
680 | 81.3k | block = next; |
681 | 81.3k | } |
682 | 54.9k | fHead = fTail = nullptr; |
683 | 54.9k | fBytesWrittenBeforeTail = 0; |
684 | 54.9k | } |
685 | | |
686 | 0 | bool SkDynamicMemoryWStream::writeToAndReset(SkWStream* dst) { |
687 | 0 | SkASSERT(dst); |
688 | | // By looping through the source and freeing as we copy, we |
689 | | // can reduce real memory use with large streams. |
690 | 0 | bool dstStreamGood = true; |
691 | 0 | for (Block* block = fHead; block != nullptr; ) { |
692 | 0 | if (dstStreamGood && !dst->write(block->start(), block->written())) { |
693 | 0 | dstStreamGood = false; |
694 | 0 | } |
695 | 0 | Block* next = block->fNext; |
696 | 0 | sk_free(block); |
697 | 0 | block = next; |
698 | 0 | } |
699 | 0 | fHead = fTail = nullptr; |
700 | 0 | fBytesWrittenBeforeTail = 0; |
701 | 0 | return dstStreamGood; |
702 | 0 | } Unexecuted instantiation: SkDynamicMemoryWStream::writeToAndReset(SkWStream*) Unexecuted instantiation: SkDynamicMemoryWStream::writeToAndReset(SkWStream*) |
703 | | |
704 | 132k | sk_sp<SkData> SkDynamicMemoryWStream::detachAsData() { |
705 | 132k | const size_t size = this->bytesWritten(); |
706 | 132k | if (0 == size) { |
707 | 77.5k | return SkData::MakeEmpty(); |
708 | 77.5k | } |
709 | 54.9k | sk_sp<SkData> data = SkData::MakeUninitialized(size); |
710 | 54.9k | this->copyToAndReset(data->writable_data()); |
711 | 54.9k | return data; |
712 | 54.9k | } |
713 | | |
714 | | #ifdef SK_DEBUG |
715 | 157k | void SkDynamicMemoryWStream::validate() const { |
716 | 157k | if (!fHead) { |
717 | 77.5k | SkASSERT(!fTail); |
718 | 77.5k | SkASSERT(fBytesWrittenBeforeTail == 0); |
719 | 77.5k | return; |
720 | 77.5k | } |
721 | 79.9k | SkASSERT(fTail); |
722 | | |
723 | 79.9k | size_t bytes = 0; |
724 | 79.9k | const Block* block = fHead; |
725 | 169k | while (block) { |
726 | 89.8k | if (block->fNext) { |
727 | 9.85k | bytes += block->written(); |
728 | 9.85k | } |
729 | 89.8k | block = block->fNext; |
730 | 89.8k | } |
731 | 79.9k | SkASSERT(bytes == fBytesWrittenBeforeTail); |
732 | 79.9k | } |
733 | | #endif |
734 | | |
735 | | //////////////////////////////////////////////////////////////////////////////////////////////// |
736 | | |
737 | | class SkBlockMemoryRefCnt : public SkRefCnt { |
738 | | public: |
739 | 0 | explicit SkBlockMemoryRefCnt(SkDynamicMemoryWStream::Block* head) : fHead(head) { } |
740 | | |
741 | 0 | ~SkBlockMemoryRefCnt() override { |
742 | 0 | SkDynamicMemoryWStream::Block* block = fHead; |
743 | 0 | while (block != nullptr) { |
744 | 0 | SkDynamicMemoryWStream::Block* next = block->fNext; |
745 | 0 | sk_free(block); |
746 | 0 | block = next; |
747 | 0 | } |
748 | 0 | } |
749 | | |
750 | | SkDynamicMemoryWStream::Block* const fHead; |
751 | | }; |
752 | | |
753 | | class SkBlockMemoryStream : public SkStreamAsset { |
754 | | public: |
755 | | SkBlockMemoryStream(sk_sp<SkBlockMemoryRefCnt> headRef, size_t size) |
756 | | : fBlockMemory(std::move(headRef)), fCurrent(fBlockMemory->fHead) |
757 | 0 | , fSize(size) , fOffset(0), fCurrentOffset(0) { } |
758 | | |
759 | 0 | size_t read(void* buffer, size_t rawCount) override { |
760 | 0 | size_t count = rawCount; |
761 | 0 | if (fOffset + count > fSize) { |
762 | 0 | count = fSize - fOffset; |
763 | 0 | } |
764 | 0 | size_t bytesLeftToRead = count; |
765 | 0 | while (fCurrent != nullptr) { |
766 | 0 | size_t bytesLeftInCurrent = fCurrent->written() - fCurrentOffset; |
767 | 0 | size_t bytesFromCurrent = std::min(bytesLeftToRead, bytesLeftInCurrent); |
768 | 0 | if (buffer) { |
769 | 0 | memcpy(buffer, fCurrent->start() + fCurrentOffset, bytesFromCurrent); |
770 | 0 | buffer = SkTAddOffset<void>(buffer, bytesFromCurrent); |
771 | 0 | } |
772 | 0 | if (bytesLeftToRead <= bytesFromCurrent) { |
773 | 0 | fCurrentOffset += bytesFromCurrent; |
774 | 0 | fOffset += count; |
775 | 0 | return count; |
776 | 0 | } |
777 | 0 | bytesLeftToRead -= bytesFromCurrent; |
778 | 0 | fCurrent = fCurrent->fNext; |
779 | 0 | fCurrentOffset = 0; |
780 | 0 | } |
781 | 0 | SkASSERT(false); |
782 | 0 | return 0; |
783 | 0 | } Unexecuted instantiation: SkBlockMemoryStream::read(void*, unsigned long) Unexecuted instantiation: SkBlockMemoryStream::read(void*, unsigned long) |
784 | | |
785 | 0 | bool isAtEnd() const override { |
786 | 0 | return fOffset == fSize; |
787 | 0 | } |
788 | | |
789 | 0 | size_t peek(void* buff, size_t bytesToPeek) const override { |
790 | 0 | SkASSERT(buff != nullptr); |
791 | |
|
792 | 0 | bytesToPeek = std::min(bytesToPeek, fSize - fOffset); |
793 | |
|
794 | 0 | size_t bytesLeftToPeek = bytesToPeek; |
795 | 0 | char* buffer = static_cast<char*>(buff); |
796 | 0 | const SkDynamicMemoryWStream::Block* current = fCurrent; |
797 | 0 | size_t currentOffset = fCurrentOffset; |
798 | 0 | while (bytesLeftToPeek) { |
799 | 0 | SkASSERT(current); |
800 | 0 | size_t bytesFromCurrent = std::min(current->written() - currentOffset, bytesLeftToPeek); |
801 | 0 | memcpy(buffer, current->start() + currentOffset, bytesFromCurrent); |
802 | 0 | bytesLeftToPeek -= bytesFromCurrent; |
803 | 0 | buffer += bytesFromCurrent; |
804 | 0 | current = current->fNext; |
805 | 0 | currentOffset = 0; |
806 | 0 | } |
807 | 0 | return bytesToPeek; |
808 | 0 | } Unexecuted instantiation: SkBlockMemoryStream::peek(void*, unsigned long) const Unexecuted instantiation: SkBlockMemoryStream::peek(void*, unsigned long) const |
809 | | |
810 | 0 | bool rewind() override { |
811 | 0 | fCurrent = fBlockMemory->fHead; |
812 | 0 | fOffset = 0; |
813 | 0 | fCurrentOffset = 0; |
814 | 0 | return true; |
815 | 0 | } |
816 | | |
817 | 0 | SkBlockMemoryStream* onDuplicate() const override { |
818 | 0 | return new SkBlockMemoryStream(fBlockMemory, fSize); |
819 | 0 | } |
820 | | |
821 | 0 | size_t getPosition() const override { |
822 | 0 | return fOffset; |
823 | 0 | } |
824 | | |
825 | 0 | bool seek(size_t position) override { |
826 | | // If possible, skip forward. |
827 | 0 | if (position >= fOffset) { |
828 | 0 | size_t skipAmount = position - fOffset; |
829 | 0 | return this->skip(skipAmount) == skipAmount; |
830 | 0 | } |
831 | | // If possible, move backward within the current block. |
832 | 0 | size_t moveBackAmount = fOffset - position; |
833 | 0 | if (moveBackAmount <= fCurrentOffset) { |
834 | 0 | fCurrentOffset -= moveBackAmount; |
835 | 0 | fOffset -= moveBackAmount; |
836 | 0 | return true; |
837 | 0 | } |
838 | | // Otherwise rewind and move forward. |
839 | 0 | return this->rewind() && this->skip(position) == position; |
840 | 0 | } |
841 | | |
842 | 0 | bool move(long offset) override { |
843 | 0 | return seek(fOffset + offset); |
844 | 0 | } |
845 | | |
846 | 0 | SkBlockMemoryStream* onFork() const override { |
847 | 0 | SkBlockMemoryStream* that = this->onDuplicate(); |
848 | 0 | that->fCurrent = this->fCurrent; |
849 | 0 | that->fOffset = this->fOffset; |
850 | 0 | that->fCurrentOffset = this->fCurrentOffset; |
851 | 0 | return that; |
852 | 0 | } |
853 | | |
854 | 0 | size_t getLength() const override { |
855 | 0 | return fSize; |
856 | 0 | } |
857 | | |
858 | 0 | const void* getMemoryBase() override { |
859 | 0 | if (fBlockMemory->fHead && !fBlockMemory->fHead->fNext) { |
860 | 0 | return fBlockMemory->fHead->start(); |
861 | 0 | } |
862 | 0 | return nullptr; |
863 | 0 | } |
864 | | |
865 | | private: |
866 | | sk_sp<SkBlockMemoryRefCnt> const fBlockMemory; |
867 | | SkDynamicMemoryWStream::Block const * fCurrent; |
868 | | size_t const fSize; |
869 | | size_t fOffset; |
870 | | size_t fCurrentOffset; |
871 | | }; |
872 | | |
873 | 0 | std::unique_ptr<SkStreamAsset> SkDynamicMemoryWStream::detachAsStream() { |
874 | 0 | if (nullptr == fHead) { |
875 | | // no need to reset. |
876 | 0 | return SkMemoryStream::Make(nullptr); |
877 | 0 | } |
878 | 0 | if (fHead == fTail) { // one block, may be worth shrinking. |
879 | 0 | ptrdiff_t used = fTail->fCurr - (char*)fTail; |
880 | 0 | fHead = fTail = (SkDynamicMemoryWStream::Block*)sk_realloc_throw(fTail, SkToSizeT(used)); |
881 | 0 | fTail->fStop = fTail->fCurr = (char*)fTail + used; // Update pointers. |
882 | 0 | SkASSERT(nullptr == fTail->fNext); |
883 | 0 | SkASSERT(0 == fBytesWrittenBeforeTail); |
884 | 0 | } |
885 | 0 | std::unique_ptr<SkStreamAsset> stream |
886 | 0 | = std::make_unique<SkBlockMemoryStream>(sk_make_sp<SkBlockMemoryRefCnt>(fHead), |
887 | 0 | this->bytesWritten()); |
888 | 0 | fHead = nullptr; // signal reset() to not free anything |
889 | 0 | this->reset(); |
890 | 0 | return stream; |
891 | 0 | } Unexecuted instantiation: SkDynamicMemoryWStream::detachAsStream() Unexecuted instantiation: SkDynamicMemoryWStream::detachAsStream() |
892 | | |
893 | | /////////////////////////////////////////////////////////////////////////////// |
894 | | /////////////////////////////////////////////////////////////////////////////// |
895 | | |
896 | 0 | static sk_sp<SkData> mmap_filename(const char path[]) { |
897 | 0 | FILE* file = sk_fopen(path, kRead_SkFILE_Flag); |
898 | 0 | if (nullptr == file) { |
899 | 0 | return nullptr; |
900 | 0 | } |
901 | | |
902 | 0 | auto data = SkData::MakeFromFILE(file); |
903 | 0 | sk_fclose(file); |
904 | 0 | return data; |
905 | 0 | } |
906 | | |
907 | 0 | std::unique_ptr<SkStreamAsset> SkStream::MakeFromFile(const char path[]) { |
908 | 0 | auto data(mmap_filename(path)); |
909 | 0 | if (data) { |
910 | 0 | return std::make_unique<SkMemoryStream>(std::move(data)); |
911 | 0 | } |
912 | | |
913 | | // If we get here, then our attempt at using mmap failed, so try normal file access. |
914 | 0 | auto stream = std::make_unique<SkFILEStream>(path); |
915 | 0 | if (!stream->isValid()) { |
916 | 0 | return nullptr; |
917 | 0 | } |
918 | 0 | return std::move(stream); |
919 | 0 | } |
920 | | |
921 | | // Declared in SkStreamPriv.h: |
922 | 0 | sk_sp<SkData> SkCopyStreamToData(SkStream* stream) { |
923 | 0 | SkASSERT(stream != nullptr); |
924 | |
|
925 | 0 | if (stream->hasLength()) { |
926 | 0 | return SkData::MakeFromStream(stream, stream->getLength()); |
927 | 0 | } |
928 | | |
929 | 0 | SkDynamicMemoryWStream tempStream; |
930 | 0 | const size_t bufferSize = 4096; |
931 | 0 | char buffer[bufferSize]; |
932 | 0 | do { |
933 | 0 | size_t bytesRead = stream->read(buffer, bufferSize); |
934 | 0 | tempStream.write(buffer, bytesRead); |
935 | 0 | } while (!stream->isAtEnd()); |
936 | 0 | return tempStream.detachAsData(); |
937 | 0 | } Unexecuted instantiation: SkCopyStreamToData(SkStream*) Unexecuted instantiation: SkCopyStreamToData(SkStream*) |
938 | | |
939 | 0 | bool SkStreamCopy(SkWStream* out, SkStream* input) { |
940 | 0 | const char* base = static_cast<const char*>(input->getMemoryBase()); |
941 | 0 | if (base && input->hasPosition() && input->hasLength()) { |
942 | | // Shortcut that avoids the while loop. |
943 | 0 | size_t position = input->getPosition(); |
944 | 0 | size_t length = input->getLength(); |
945 | 0 | SkASSERT(length >= position); |
946 | 0 | return out->write(&base[position], length - position); |
947 | 0 | } |
948 | 0 | char scratch[4096]; |
949 | 0 | size_t count; |
950 | 0 | while (true) { |
951 | 0 | count = input->read(scratch, sizeof(scratch)); |
952 | 0 | if (0 == count) { |
953 | 0 | return true; |
954 | 0 | } |
955 | 0 | if (!out->write(scratch, count)) { |
956 | 0 | return false; |
957 | 0 | } |
958 | 0 | } |
959 | 0 | } Unexecuted instantiation: SkStreamCopy(SkWStream*, SkStream*) Unexecuted instantiation: SkStreamCopy(SkWStream*, SkStream*) |