Method validate

third-part/skia/src/effects/gradients/SkGradientBitmapCache.cpp:120–151

#ifdef SK_DEBUG

void SkGradientBitmapCache::validate() const {
    SkASSERT(fEntryCount >= 0 && fEntryCount <= fMaxEntries);

    if (fEntryCount > 0) {
        SkASSERT(NULL == fHead->fPrev);
        SkASSERT(NULL == fTail->fNext);

        if (fEntryCount == 1) {
            SkASSERT(fHead == fTail);
        } else {
            SkASSERT(fHead != fTail);
        }

        Entry* entry = fHead;
        int count = 0;
        while (entry) {
            count += 1;
            entry = entry->fNext;
        }
        SkASSERT(count == fEntryCount);

        entry = fTail;
        while (entry) {
            count -= 1;
            entry = entry->fPrev;
        }
        SkASSERT(0 == count);
    } else {
        SkASSERT(NULL == fHead);
        SkASSERT(NULL == fTail);
    }
}

#endif