Method readAt

framework/data_source/cache/sliceBufferSource.cpp:119–148

    }

    int sliceBuffer::readAt(uint8_t *buffer, int size, uint64_t offset)
    {
        uint64_t curNum = offset / mSliceSize;
        uint64_t startPos = offset % mSliceSize;

        if (curNum >= mSliceCount) {
            return 0;
        }

        if (mSlices[curNum] == nullptr) {
            return -EAGAIN;
        }

        int sizeRead = 0;

        for (uint64_t i = curNum; i < mSliceCount; ++i) {
            if (mSlices[i]->getValidSize() == 0) {
                break;
            }

            sizeRead += mSlices[i]->readAt(buffer + sizeRead, static_cast<int>(mSliceSize), startPos);
            startPos = 0;

            if (sizeRead >= size) {
                break;
            }
        }

        return sizeRead;
    }

    void sliceBuffer::dump()
    {