readLong
Removes eight bytes from this source and returns a long integer composed of it according to the big-endian order.
Throws
when there are not enough data to read a long value.
when the source is closed.
when some I/O error occurs.
Samples
import kotlinx.io.*
import kotlin.test.*
fun main() {
//sampleStart
val buffer = Buffer()
buffer.write(byteArrayOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
assertEquals(0x0102030405060708L, buffer.readLong())
assertEquals(2, buffer.size)
//sampleEnd
}