166     size_t distance = 0;  in GetDistance()  local
174             distance = static_cast<size_t>(aEndPtr - aStartPtr);  in GetDistance()
178             distance = static_cast<size_t>(mBufferEnd - aStartPtr);  in GetDistance()
179             distance += static_cast<size_t>(aEndPtr - mBuffer);  in GetDistance()
188             distance = static_cast<size_t>(aStartPtr - aEndPtr);  in GetDistance()
192             distance = static_cast<size_t>(mBufferEnd - aEndPtr);  in GetDistance()
193             distance += static_cast<size_t>(aStartPtr - mBuffer);  in GetDistance()
203     return static_cast<uint16_t>(distance);  in GetDistance()
438     uint16_t distance;  in InFrameOverwrite()  local
446     distance      = GetDistance(mWriteSegmentHead, aPosition.mPosition, mWriteDirection);  in InFrameOverwrite()
447     VerifyOrExit(distance + aDataBufferLength <= segmentLength, error = OT_ERROR_INVALID_ARGS);  in InFrameOverwrite()
466     uint16_t distance = 0;  in InFrameGetDistance()  local
477     distance = GetDistance(aPosition.mPosition, mWriteSegmentTail, mWriteDirection);  in InFrameGetDistance()
480     return distance;  in InFrameGetDistance()