import { int32 } from './int32' ; param { boolean } returnLeft param { Uint8Array } left param { Uint8Array } right returns { Uint8Array } export function select ( returnLeft , left , right ) { if ( left . length !== right . length ) { throw new Error ( 'select() expects two Uint8Array objects of equal length' ) ; } const mask = ( - ! ! returnLeft ) & 0xff ; const out = new Uint8Array ( left . length ) ; for ( let i = 0 ; i < left . length ; i ++ ) { out [ i ] = right [ i ] ^ ( ( left [ i ] ^ right [ i ] ) & mask ) ; } return out ; } param { number } choice param { Uint8Array } m param { Uint8Array } n returns { Uint8Array } export function select_alt ( choice , m , n ) { if ( m . length !== n . length ) { throw new Error ( 'Both Uint8Arrays must be the same length' ) ; } const mask = ( - choice ) & 0xff ; const out = new Uint8Array ( m . length ) ; for ( let i = 0 ; i < out . length ; i ++ ) { out [ i ] = n [ i ] ^ ( ( m [ i ] ^ n [ i ] ) & mask ) ; } return out ; } param { number } returnLeft param { number } left param { number } right returns { number } export function select_ints ( returnLeft , left , right ) { const mask = ( - ( returnLeft & 1 ) ) & 0xfffffffff ; return right ^ ( ( left ^ right ) & mask ) ; } param { number } returnLeft param { number } left param { number } right returns { number } export function select_int32 ( returnLeft , left , right ) { return right . xor ( left . xor ( right ) . and ( int32 . fromFlag ( returnLeft & 1 ) ) ) ; }