The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/utils/SkBitSet.cpp
gfx/skia/trunk/src/utils/SkBitSet.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:ba98ac6b9ace |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #include "SkBitSet.h" | |
| 11 | |
| 12 SkBitSet::SkBitSet(int numberOfBits) | |
| 13 : fBitData(NULL), fDwordCount(0), fBitCount(numberOfBits) { | |
| 14 SkASSERT(numberOfBits > 0); | |
| 15 // Round up size to 32-bit boundary. | |
| 16 fDwordCount = (numberOfBits + 31) / 32; | |
| 17 fBitData.set(malloc(fDwordCount * sizeof(uint32_t))); | |
| 18 clearAll(); | |
| 19 } | |
| 20 | |
| 21 SkBitSet::SkBitSet(const SkBitSet& source) | |
| 22 : fBitData(NULL), fDwordCount(0), fBitCount(0) { | |
| 23 *this = source; | |
| 24 } | |
| 25 | |
| 26 SkBitSet& SkBitSet::operator=(const SkBitSet& rhs) { | |
| 27 if (this == &rhs) { | |
| 28 return *this; | |
| 29 } | |
| 30 fBitCount = rhs.fBitCount; | |
| 31 fBitData.free(); | |
| 32 fDwordCount = rhs.fDwordCount; | |
| 33 fBitData.set(malloc(fDwordCount * sizeof(uint32_t))); | |
| 34 memcpy(fBitData.get(), rhs.fBitData.get(), fDwordCount * sizeof(uint32_t)); | |
| 35 return *this; | |
| 36 } | |
| 37 | |
| 38 bool SkBitSet::operator==(const SkBitSet& rhs) { | |
| 39 if (fBitCount == rhs.fBitCount) { | |
| 40 if (fBitData.get() != NULL) { | |
| 41 return (memcmp(fBitData.get(), rhs.fBitData.get(), | |
| 42 fDwordCount * sizeof(uint32_t)) == 0); | |
| 43 } | |
| 44 return true; | |
| 45 } | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 bool SkBitSet::operator!=(const SkBitSet& rhs) { | |
| 50 return !(*this == rhs); | |
| 51 } | |
| 52 | |
| 53 void SkBitSet::clearAll() { | |
| 54 if (fBitData.get() != NULL) { | |
| 55 sk_bzero(fBitData.get(), fDwordCount * sizeof(uint32_t)); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 void SkBitSet::setBit(int index, bool value) { | |
| 60 uint32_t mask = 1 << (index % 32); | |
| 61 if (value) { | |
| 62 *(internalGet(index)) |= mask; | |
| 63 } else { | |
| 64 *(internalGet(index)) &= ~mask; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 bool SkBitSet::isBitSet(int index) const { | |
| 69 uint32_t mask = 1 << (index % 32); | |
| 70 return 0 != (*internalGet(index) & mask); | |
| 71 } | |
| 72 | |
| 73 bool SkBitSet::orBits(const SkBitSet& source) { | |
| 74 if (fBitCount != source.fBitCount) { | |
| 75 return false; | |
| 76 } | |
| 77 uint32_t* targetBitmap = internalGet(0); | |
| 78 uint32_t* sourceBitmap = source.internalGet(0); | |
| 79 for (size_t i = 0; i < fDwordCount; ++i) { | |
| 80 targetBitmap[i] |= sourceBitmap[i]; | |
| 81 } | |
| 82 return true; | |
| 83 } |
