xxh3_64.go

package xxh3

import (
    "fmt"
    "hash"
)

// New64 returns a new hash.Hash64 computing the XXH3-64 checksum
func New64() hash.Hash64 {
    return New64WithSeed(0)
}

// New64WithSecret returns a new hash.Hash64 computing the XXH3-64 checksum
func New64WithSecret(secret []byte) (hash.Hash64, error) {
    if len(secret) < SECRET_SIZE_MIN {
        return nil, fmt.Errorf("secret too short")
    }

    return newDigest64(0, secret), nil
}

// New64WithSeed returns a new hash.Hash64 computing the XXH3-64 checksum
func New64WithSeed(seed uint64) hash.Hash64 {
    secret := make([]byte, SECRET_DEFAULT_SIZE)
    GenCustomSecret(secret, seed)

    return newDigest64(seed, secret)
}

// Sum64 returns the 64bits Hash value.
func Sum64(input []byte) (out [Size64]byte) {
    d := New64()
    d.Write(input)
    sum := d.Sum(nil)

    copy(out[:], sum)
    return
}

// Sum64WithSeed returns the 64bits Hash value.
func Sum64WithSeed(input []byte, seed uint64) (out [Size64]byte) {
    d := New64WithSeed(seed)
    d.Write(input)
    sum := d.Sum(nil)

    copy(out[:], sum)
    return
}

// Checksum64 returns the uint64 value.
func Checksum64(input []byte) uint64 {
    d := New64()
    d.Write(input)

    return d.Sum64()
}

// Checksum64WithSeed returns the uint64 value.
func Checksum64WithSeed(input []byte, seed uint64) uint64 {
    d := New64WithSeed(seed)
    d.Write(input)

    return d.Sum64()
}