package zero_test

import (
	"testing"
	
	. "github.com/p9c/p9/pkg/util/zero"
)

var (
	bytes32 = make([]byte, 32) // typical key size
	bytes64 = make([]byte, 64) // passphrase hash size
	bytea32 = new([32]byte)
	bytea64 = new([64]byte)
)

// xor is the "slow" byte zeroing implementation which this package originally replaced. If this function benchmarks
// faster than the functions exported by this package in a future Go version (perhaps by calling runtime.memclr),
// replace the "optimized" versions with this.
func xor(b []byte) {
	for i := range b {
		b[i] ^= b[i]
	}
}

// zrange is an alternative zero implementation that, while currently slower than the functions provided by this
// package, may be faster in a future Go release. Switch to this or the xor implementation if they ever become faster.
func zrange(b []byte) {
	for i := range b {
		b[i] = 0
	}
}
func BenchmarkXor32(b *testing.B) {
	for i := 0; i < b.N; i++ {
		xor(bytes32)
	}
}
func BenchmarkXor64(b *testing.B) {
	for i := 0; i < b.N; i++ {
		xor(bytes64)
	}
}
func BenchmarkRange32(b *testing.B) {
	for i := 0; i < b.N; i++ {
		zrange(bytes32)
	}
}
func BenchmarkRange64(b *testing.B) {
	for i := 0; i < b.N; i++ {
		zrange(bytes64)
	}
}
func BenchmarkBytes32(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Bytes(bytes32)
	}
}
func BenchmarkBytes64(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Bytes(bytes64)
	}
}
func BenchmarkBytea32(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Bytea32(bytea32)
	}
}
func BenchmarkBytea64(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Bytea64(bytea64)
	}
}