import { int32 } from './int32' ; param { Uint8Array } left param { Uint8Array } right returns { number } export function compare ( left , right ) { if ( left . length !== right . length ) { throw new Error ( 'Both arrays must be of equal length' ) ; } let gt = 0 ; let eq = 1 ; let l = int32 . zero ( ) ; let r = int32 . zero ( ) ; for ( let i = 0 ; i < left . length ; i ++ ) { r = int32 . fromInt ( right [ i ] ) ; l = int32 . fromInt ( left [ i ] ) ; const d = r . sub ( l ) ; gt |= d . xor ( l . xor ( r ) . and ( l . xor ( d ) ) ) . msb ( ) & eq ; eq &= r . xor ( l ) . isZero ( ) ; } l . wipe ( ) ; r . wipe ( ) ; return ( gt + gt + eq ) - 1 ; } param { Uint8Array } left param { Uint8Array } right returns { Uint32Array } export function compare_alt ( left , right ) { const ret = new Uint32Array ( 1 ) ; if ( left . length !== right . length ) { throw new Error ( 'Both arrays must be of equal length' ) ; } let gt = 0 ; let eq = 1 ; let l ; let r ; for ( let i = 0 ; i < left . length ; i ++ ) { r = int32 . fromInt ( right [ i ] ) ; l = int32 . fromInt ( left [ i ] ) ; const d = r . sub ( l ) ; gt |= d . xor ( l . xor ( r ) . and ( l . xor ( d ) ) ) . msb ( ) & eq ; eq &= r . xor ( l ) . isZero ( ) ; } l . wipe ( ) ; r . wipe ( ) ; ret [ 0 ] = ( gt + gt + eq ) ; ret [ 0 ] -- ; return ret ; } param { number } left param { number } right returns { number } export function compare_ints ( left , right ) { const L = int32 . fromInt ( left ) ; const R = int32 . fromInt ( right ) ; const diff = R . sub ( L ) ; const gt = diff . xor ( L . xor ( R ) . and ( L . xor ( diff ) ) ) . msb ( ) ; const eq = R . xor ( L ) . isZero ( ) ; L . wipe ( ) ; R . wipe ( ) ; return ( gt + gt + eq ) - 1 ; } param { number } left param { number } right returns { Uint32Array } export function compare_ints_alt ( left , right ) { const ret = new Uint32Array ( 1 ) ; const R = int32 . fromInt ( right ) ; const L = int32 . fromInt ( left ) ; const diff = R . sub ( L ) ; const gt = diff . xor ( L . xor ( R ) . and ( L . xor ( diff ) ) ) . msb ( ) ; const eq = R . xor ( L ) . isZero ( ) ; L . wipe ( ) ; R . wipe ( ) ; ret [ 0 ] = ( gt + gt + eq ) ; ret [ 0 ] -- ; return ret ; }