copyBytes(to:count:)
Copies the provided number of bytes from the start of the type into a raw memory buffer.
Declaration
@discardableResult func copyBytes(to: UnsafeMutableRawBufferPointer, count: Int) -> IntParameters
- to:
A pointer to the raw memory buffer you want to copy the bytes into.
- count:
The number of bytes to copy.
Return Value
The number of bytes copied.
Discussion
The following example copies the number of bytes that count identified from the beginning of the raw memory buffer into the provided raw memory buffer:
let source: [UInt8] = [0, 1, 2]
var dest: [UInt8] = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
dest.withUnsafeMutableBytes { destBufferPtr in
let count = source.copyBytes(to: destBufferPtr, count: 2)
// count == 2
}
// dest = [0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF]