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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkFrontBufferedStream.h" | 8 #include "SkFrontBufferedStream.h" |
9 #include "SkStream.h" | 9 #include "SkStream.h" |
10 #include "SkTemplates.h" | 10 #include "SkTemplates.h" |
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140 SkASSERT(size > 0); | 140 SkASSERT(size > 0); |
141 // If we get here, we have buffered all that can be buffered. | 141 // If we get here, we have buffered all that can be buffered. |
142 SkASSERT(fBufferSize == fBufferedSoFar && fOffset >= fBufferSize); | 142 SkASSERT(fBufferSize == fBufferedSoFar && fOffset >= fBufferSize); |
143 | 143 |
144 const size_t bytesReadDirectly = fStream->read(dst, size); | 144 const size_t bytesReadDirectly = fStream->read(dst, size); |
145 fOffset += bytesReadDirectly; | 145 fOffset += bytesReadDirectly; |
146 | 146 |
147 // If we have read past the end of the buffer, rewinding is no longer | 147 // If we have read past the end of the buffer, rewinding is no longer |
148 // supported, so we can go ahead and free the memory. | 148 // supported, so we can go ahead and free the memory. |
149 if (bytesReadDirectly > 0) { | 149 if (bytesReadDirectly > 0) { |
150 sk_free(fBuffer.detach()); | 150 sk_free(fBuffer.release()); |
151 } | 151 } |
152 | 152 |
153 return bytesReadDirectly; | 153 return bytesReadDirectly; |
154 } | 154 } |
155 | 155 |
156 size_t FrontBufferedStream::peek(void* dst, size_t size) const { | 156 size_t FrontBufferedStream::peek(void* dst, size_t size) const { |
157 // Keep track of the offset so we can return to it. | 157 // Keep track of the offset so we can return to it. |
158 const size_t start = fOffset; | 158 const size_t start = fOffset; |
159 | 159 |
160 if (start >= fBufferSize) { | 160 if (start >= fBufferSize) { |
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203 } | 203 } |
204 | 204 |
205 if (size > 0 && !fStream->isAtEnd()) { | 205 if (size > 0 && !fStream->isAtEnd()) { |
206 SkDEBUGCODE(const size_t bytesReadDirectly =) this->readDirectlyFromStre
am(dst, size); | 206 SkDEBUGCODE(const size_t bytesReadDirectly =) this->readDirectlyFromStre
am(dst, size); |
207 SkDEBUGCODE(size -= bytesReadDirectly;) | 207 SkDEBUGCODE(size -= bytesReadDirectly;) |
208 SkASSERT(size + (fOffset - start) == totalSize); | 208 SkASSERT(size + (fOffset - start) == totalSize); |
209 } | 209 } |
210 | 210 |
211 return fOffset - start; | 211 return fOffset - start; |
212 } | 212 } |
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