[swift-users] Slicing a [UInt8] into a Data without copying?

[Rick Mann]

Thanks!

> On May 4, 2017, at 16:44 , Philippe Hausler <phausler at apple.com> wrote:
> 
> Not sure on exactly how you are wanting to use this but you could approach this like:
> 
> let bytes: [UInt8] = [ 0xC0, 0xC0, 0xA1, 0x00, 0xC0, 0xC0, 0xA1, 0x00]
> let slice = bytes[0..<4]
> slice.withUnsafeBytes { buffer in
>     let d = Data(bytesNoCopy: UnsafeMutableRawPointer(mutating: buffer.baseAddress!), count: buffer.count, deallocator: .none)
>     // whatever you do, dont let d escape
> }
> 
> 
> 
>> On May 4, 2017, at 16:31, Rick Mann via swift-users <swift-users at swift.org> wrote:
>> 
>> Is it possible to make a (immutable) Data() object from a slice of a [UInt8] and avoid copying the data?
>> 
>> -- 
>> Rick Mann
>> rmann at latencyzero.com
>> 
>> 
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> 


-- 
Rick Mann
rmann at latencyzero.com