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C++ SkRandom::nextBiasedBool方法代码示例

本文整理汇总了C++中SkRandom::nextBiasedBool方法的典型用法代码示例。如果您正苦于以下问题:C++ SkRandom::nextBiasedBool方法的具体用法?C++ SkRandom::nextBiasedBool怎么用?C++ SkRandom::nextBiasedBool使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在SkRandom的用法示例。


在下文中一共展示了SkRandom::nextBiasedBool方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: TestTLList

static void TestTLList(skiatest::Reporter* reporter) {
    typedef SkTLList<ListElement> ElList;
    typedef ElList::Iter Iter;
    SkRandom random;

    for (int i = 1; i <= 16; i *= 2) {

        ElList list1(i);
        ElList list2(i);
        Iter iter1;
        Iter iter2;
        Iter iter3;
        Iter iter4;

#if SK_ENABLE_INST_COUNT
        SkASSERT(0 == ListElement::InstanceCount());
#endif

        REPORTER_ASSERT(reporter, list1.isEmpty());
        REPORTER_ASSERT(reporter, NULL == iter1.init(list1, Iter::kHead_IterStart));
        REPORTER_ASSERT(reporter, NULL == iter1.init(list1, Iter::kTail_IterStart));
        // Try popping an empty list
        list1.popHead();
        list1.popTail();
        REPORTER_ASSERT(reporter, list1.isEmpty());
        REPORTER_ASSERT(reporter, list1 == list2);

        // Create two identical lists, one by appending to head and the other to the tail.
        list1.addToHead(ListElement(1));
        list2.addToTail(ListElement(1));
#if SK_ENABLE_INST_COUNT
        SkASSERT(2 == ListElement::InstanceCount());
#endif
        iter1.init(list1, Iter::kHead_IterStart);
        iter2.init(list1, Iter::kTail_IterStart);
        REPORTER_ASSERT(reporter, iter1.get()->fID == iter2.get()->fID);
        iter3.init(list2, Iter::kHead_IterStart);
        iter4.init(list2, Iter::kTail_IterStart);
        REPORTER_ASSERT(reporter, iter3.get()->fID == iter1.get()->fID);
        REPORTER_ASSERT(reporter, iter4.get()->fID == iter1.get()->fID);
        REPORTER_ASSERT(reporter, list1 == list2);

        list2.reset();

        // use both before/after in-place construction on an empty list
        SkNEW_INSERT_IN_LLIST_BEFORE(&list2, list2.headIter(), ListElement, (1));
        REPORTER_ASSERT(reporter, list2 == list1);
        list2.reset();

        SkNEW_INSERT_IN_LLIST_AFTER(&list2, list2.tailIter(), ListElement, (1));
        REPORTER_ASSERT(reporter, list2 == list1);

        // add an element to the second list, check that iters are still valid
        iter3.init(list2, Iter::kHead_IterStart);
        iter4.init(list2, Iter::kTail_IterStart);
        list2.addToHead(ListElement(2));

#if SK_ENABLE_INST_COUNT
        SkASSERT(3 == ListElement::InstanceCount());
#endif

        REPORTER_ASSERT(reporter, iter3.get()->fID == iter1.get()->fID);
        REPORTER_ASSERT(reporter, iter4.get()->fID == iter1.get()->fID);
        REPORTER_ASSERT(reporter, 1 == Iter(list2, Iter::kTail_IterStart).get()->fID);
        REPORTER_ASSERT(reporter, 2 == Iter(list2, Iter::kHead_IterStart).get()->fID);
        REPORTER_ASSERT(reporter, list1 != list2);
        list1.addToHead(ListElement(2));
        REPORTER_ASSERT(reporter, list1 == list2);
#if SK_ENABLE_INST_COUNT
        SkASSERT(4 == ListElement::InstanceCount());
#endif
        REPORTER_ASSERT(reporter, !list1.isEmpty());

        list1.reset();
        list2.reset();
#if SK_ENABLE_INST_COUNT
        SkASSERT(0 == ListElement::InstanceCount());
#endif
        REPORTER_ASSERT(reporter, list1.isEmpty() && list2.isEmpty());

        // randomly perform insertions and deletions on a list and perform tests
        int count = 0;
        for (int j = 0; j < 100; ++j) {
            if (list1.isEmpty() || random.nextBiasedBool(3  * SK_Scalar1 / 4)) {
                int id = j;
                // Choose one of three ways to insert a new element: at the head, at the tail,
                // before a random element, after a random element
                int numValidMethods = 0 == count ? 2 : 4;
                int insertionMethod = random.nextULessThan(numValidMethods);
                switch (insertionMethod) {
                    case 0:
                        list1.addToHead(ListElement(id));
                        break;
                    case 1:
                        list1.addToTail(ListElement(id));
                        break;
                    case 2: // fallthru to share code that picks random element.
                    case 3: {
                        int n = random.nextULessThan(list1.count());
                        Iter iter = list1.headIter();
//.........这里部分代码省略.........
开发者ID:CriGio,项目名称:platform_external_skia,代码行数:101,代码来源:LListTest.cpp


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