//go:build (amd64 || arm64) && !purego

package sm3

import (
	"encoding/binary"
	"fmt"
	"testing"
)

func initState4() [4]*[8]uint32 {
	d := new(digest)
	d.Reset()
	var dig1 = d.h
	var dig2 = d.h
	var dig3 = d.h
	return [4]*[8]uint32{&d.h, &dig1, &dig2, &dig3}
}

func createOneBlockBy4() [4]*byte {
	var p1 [64]byte
	p1[0] = 0x61
	p1[1] = 0x62
	p1[2] = 0x63
	p1[3] = 0x80
	p1[63] = 0x18
	var p2 = p1
	var p3 = p1
	var p4 = p1
	return [4]*byte{&p1[0], &p2[0], &p3[0], &p4[0]}
}

func createTwoBlocksBy4() [4]*byte {
	var p1 [128]byte
	p1[0] = 0x61
	p1[1] = 0x62
	p1[2] = 0x63
	p1[3] = 0x64
	copy(p1[4:], p1[:4])
	copy(p1[8:], p1[:8])
	copy(p1[16:], p1[:16])
	copy(p1[32:], p1[:32])
	p1[64] = 0x80
	p1[126] = 0x02
	var p2 = p1
	var p3 = p1
	var p4 = p1
	return [4]*byte{&p1[0], &p2[0], &p3[0], &p4[0]}
}

func TestBlockMultBy4(t *testing.T) {
	digs := initState4()
	p := createOneBlockBy4()
	buffer := make([]byte, preallocSize)
	blockMultBy4(&digs[0], &p[0], &buffer[0], 1)
	expected := "[66c7f0f4 62eeedd9 d1f2d46b dc10e4e2 4167c487 5cf2f7a2 297da02b 8f4ba8e0]"
	for i := 0; i < 128+68*4*4; i += 64 {
		fmt.Printf("%08x %08x %08x %08x ", binary.LittleEndian.Uint32(buffer[i:]), binary.LittleEndian.Uint32(buffer[i+4:]), binary.LittleEndian.Uint32(buffer[i+8:]), binary.LittleEndian.Uint32(buffer[i+12:]))
		fmt.Printf("%08x %08x %08x %08x ", binary.LittleEndian.Uint32(buffer[i+16:]), binary.LittleEndian.Uint32(buffer[i+20:]), binary.LittleEndian.Uint32(buffer[i+24:]), binary.LittleEndian.Uint32(buffer[i+28:]))
		fmt.Printf("%08x %08x %08x %08x ", binary.LittleEndian.Uint32(buffer[i+32:]), binary.LittleEndian.Uint32(buffer[i+36:]), binary.LittleEndian.Uint32(buffer[i+40:]), binary.LittleEndian.Uint32(buffer[i+44:]))
		fmt.Printf("%08x %08x %08x %08x ", binary.LittleEndian.Uint32(buffer[i+48:]), binary.LittleEndian.Uint32(buffer[i+52:]), binary.LittleEndian.Uint32(buffer[i+56:]), binary.LittleEndian.Uint32(buffer[i+60:]))
		fmt.Println()
	}
	s := fmt.Sprintf("%x", digs[0][:])
	if s != expected {
		t.Errorf("digs[0] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[1][:])
	if s != expected {
		t.Errorf("digs[1] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[2][:])
	if s != expected {
		t.Errorf("digs[2] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[3][:])
	if s != expected {
		t.Errorf("digs[3] got %s", s)
	}

	digs = initState4()
	p = createTwoBlocksBy4()
	blockMultBy4(&digs[0], &p[0], &buffer[0], 2)
	expected = "[debe9ff9 2275b8a1 38604889 c18e5a4d 6fdb70e5 387e5765 293dcba3 9c0c5732]"
	s = fmt.Sprintf("%x", digs[0][:])
	if s != expected {
		t.Errorf("digs[0] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[1][:])
	if s != expected {
		t.Errorf("digs[1] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[2][:])
	if s != expected {
		t.Errorf("digs[2] got %s", s)
	}
	s = fmt.Sprintf("%x", digs[3][:])
	if s != expected {
		t.Errorf("digs[3] got %s", s)
	}
}

func BenchmarkOneBlockBy4(b *testing.B) {
	digs := initState4()
	p := createOneBlockBy4()
	buffer := make([]byte, 1216)
	b.SetBytes(64 * 4)
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		blockMultBy4(&digs[0], &p[0], &buffer[0], 1)
	}
}

func BenchmarkTwoBlocksBy4(b *testing.B) {
	digs := initState4()
	p := createTwoBlocksBy4()
	buffer := make([]byte, 1216)
	b.SetBytes(64 * 2 * 4)
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		blockMultBy4(&digs[0], &p[0], &buffer[0], 2)
	}
}