Re: How to detect endian-ness in Swift?
Re: How to detect endian-ness in Swift?
- Subject: Re: How to detect endian-ness in Swift?
- From: Chris Lattner <email@hidden>
- Date: Wed, 23 Jul 2014 17:14:53 -0700
On Jul 23, 2014, at 2:59 AM, Gerriet M. Denkmann <email@hidden> wrote:
> This compiles without warnings:
>
> #if __LITTLE_ENDIAN__
> let encoding = NSUTF32LittleEndianStringEncoding;
> println("LittleEndian")
> #else
> let encoding = NSUTF32BigEndianStringEncoding;
> println("BigEndian")
> #endif
>
> But it prints "BigEndian", which probably is NOT quite right.
> How to correctly set my encoding?
Swift doesn’t currently support any big endian targets, but you can test for it with something like:
if Int(bigEndian: 42) == 42 {
// is big endian
}
or:
if Int(littleEndian: 42) == 42 {
// is little endian
}
These initializers for Int convert the argument in a specified endianness to the native machine endianness.
-Chris
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