CODEWITHSUNDEEP
xcodeswift
udondan
udondan

Reputation: 60039

How to detect if client system is 32 or 64 bit?

How would one detect if a client system is 32 or 64 bit in Swift?

I wasn't able to find anything in documentation and I had a hard time finding a solution. Therefore posting the answer below.

Upvotes: 4

Views: 2080

Answers (3)

S-K'
S-K'

Reputation: 3209

swift 4 let is64bit = Int.bitWidth == Int64.bitWidth

Upvotes: 6

rintaro
rintaro

Reputation: 51911

The size of Int is guaranteed to be the same as platform’s native word size. see the docs.

So this should works:

let bit = sizeof(Int) * Int(BYTE_SIZE)
let is64bit = sizeof(Int) == sizeof(Int64)
let is32bit = sizeof(Int) == sizeof(Int32)

Upvotes: 9

udondan
udondan

Reputation: 60039

In a 64-bit environment, a CGFloat is the same size as a Double. In a 32-bit environment it is the same size as a Float. There's a constant CGFLOAT_IS_DOUBLE which is therefore 1 on a 64-bit system.

let bit = 32 + (32 * CGFLOAT_IS_DOUBLE)

Upvotes: 3

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