ByteBuffer Example

The following is an example of writing data to and reading data from a stream using ByteBuffer.

import std.io.*

main(): Unit {
    let arr1 = "test case".toArray()
    let byteBuffer = ByteBuffer()

    /* Write the data in arr1 to the stream. */
    byteBuffer.write(arr1)

    /* Read a piece of data of the first 4 bytes to arr2. */
    let arr2 = Array<Byte>(4, repeat: 0)
    byteBuffer.read(arr2)
    println(String.fromUtf8(arr2))

    /* Point the stream index to the start point. */
    byteBuffer.seek(Begin(0))

    /* Read all data in the stream. */
    let arr3 = readToEnd(byteBuffer)
    println(String.fromUtf8(arr3))

    /* Point the stream index to the position of the letter 'c'. */
    byteBuffer.seek(End(-4))

    /* Read the remaining data in the stream. */
    let str = readString(byteBuffer)
    println(str)
}

Results:

test
test case
case