src/utils/SkBitSet: simplify

src/utils/SkBitSet.cpp

-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkBitSet.h"
-
-SkBitSet::SkBitSet(int numberOfBits)
-    : fBitData(nullptr), fDwordCount(0), fBitCount(numberOfBits) {
-    SkASSERT(numberOfBits > 0);
-    // Round up size to 32-bit boundary.
-    fDwordCount = (numberOfBits + 31) / 32;
-    fBitData.set(sk_calloc_throw(fDwordCount * sizeof(uint32_t)));
-}
-
-SkBitSet::SkBitSet(SkBitSet&& source)
-    : fBitData(source.fBitData.release())
-    , fDwordCount(source.fDwordCount)
-    , fBitCount(source.fBitCount) {
-    source.fDwordCount = 0;
-    source.fBitCount = 0;
-}
-
-SkBitSet& SkBitSet::operator=(SkBitSet&& rhs) {
-    if (this != &rhs) {
-        fBitCount = rhs.fBitCount;
-        fDwordCount = rhs.fDwordCount;
-        fBitData.reset();  // Free old pointer.
-        fBitData.set(rhs.fBitData.release());
-        rhs.fBitCount = 0;
-        rhs.fDwordCount = 0;
-    }
-    return *this;
-}
-
-bool SkBitSet::operator==(const SkBitSet& rhs) {
-    if (fBitCount == rhs.fBitCount) {
-        if (fBitData.get() != nullptr) {
-            return (memcmp(fBitData.get(), rhs.fBitData.get(),
-                           fDwordCount * sizeof(uint32_t)) == 0);
-        }
-        return true;
-    }
-    return false;
-}
-
-bool SkBitSet::operator!=(const SkBitSet& rhs) {
-    return !(*this == rhs);
-}
-
-void SkBitSet::clearAll() {
-    if (fBitData.get() != nullptr) {
-        sk_bzero(fBitData.get(), fDwordCount * sizeof(uint32_t));
-    }
-}
-
-bool SkBitSet::orBits(const SkBitSet& source) {
-    if (fBitCount != source.fBitCount) {
-        return false;
-    }
-    uint32_t* targetBitmap = this->internalGet(0);
-    uint32_t* sourceBitmap = source.internalGet(0);
-    for (size_t i = 0; i < fDwordCount; ++i) {
-        targetBitmap[i] |= sourceBitmap[i];
-    }
-    return true;
-}