Beispiel #1
0
Datei: id.go Projekt: etcenter/c4
/*
 * Cmp compares to c4ids.
 * There are 3 possible return values.
 * -1 : Argument id is less than calling id.
 * 0: Argument id and calling id are identical.
 * +1: Argument id is greater than calling id.
 * Comparison is done on the actual numerical value of the ids.
 * Not the string representation.
 */
func (x *ID) Cmp(y *ID) int {
	if y == nil {
		return -1
	}
	bigX := big.Int(*x)
	bigY := big.Int(*y)
	return bigX.Cmp(&bigY)
}
Beispiel #2
0
// ListenStreamArgs returns the arguments required to be passed to
// net.ListenTCP().  If the Mask of ipv6 is not a /128, ListenStreamArgs()
// will fail.  See Host() to create an IPv6Addr with its mask set to /128.
func (ipv6 IPv6Addr) ListenStreamArgs() (network, listenArgs string) {
	ipv6Mask := big.Int(*ipv6.Mask)
	if ipv6Mask.Cmp(ipv6HostMask) != 0 {
		return "tcp6", ""
	}
	return "tcp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
Beispiel #3
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// DialPacketArgs returns the arguments required to be passed to
// net.DialUDP().  If the Mask of ipv6 is not a /128 or the Port is 0,
// DialPacketArgs() will fail.  See Host() to create an IPv6Addr with its
// mask set to /128.
func (ipv6 IPv6Addr) DialPacketArgs() (network, dialArgs string) {
	ipv6Mask := big.Int(*ipv6.Mask)
	if ipv6Mask.Cmp(ipv6HostMask) != 0 || ipv6.Port == 0 {
		return "udp6", ""
	}
	return "udp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
Beispiel #4
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// MarshalJSON adds output support for package encoding/json.
func (id *ID) MarshalJSON() ([]byte, error) {
	bigID := big.Int(*id)
	if bigID.Cmp(big.NewInt(0)) == 0 {
		return []byte(`""`), nil
	}
	return []byte(`"` + id.String() + `"`), nil
}
Beispiel #5
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func TestAppendOrder(t *testing.T) {
	is := is.New(t)
	byteData := [4][]byte{
		{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58},
		{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0d, 0x24},
		{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0xfa, 0x28},
		{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xac, 0xad, 0x10},
	}
	expectedIDs := [4]string{
		`c41111111111111111111111111111111111111111111111111111111111111111111111111111111111111121`,
		`c41111111111111111111111111111111111111111111111111111111111111111111111111111111111111211`,
		`c41111111111111111111111111111111111111111111111111111111111111111111111111111111111112111`,
		`c41111111111111111111111111111111111111111111111111111111111111111111111111111111111121111`,
	}
	for k := 0; k < 4; k++ {
		b := byteData[k]
		bignum := big.NewInt(0)
		bignum = bignum.SetBytes(b)
		id := asset.ID(*bignum)
		is.Equal(id.String(), expectedIDs[k])

		id2, err := asset.ParseID(expectedIDs[k])
		is.NoErr(err)
		bignum2 := big.Int(*id2)
		b = (&bignum2).Bytes()
		size := len(b)
		for size < 64 {
			b = append([]byte{0}, b...)
			size++
		}
		for i, bb := range b {
			is.Equal(bb, byteData[k][i])
		}
	}
}
Beispiel #6
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// Return the 64 raw bytes of a c4 id.  I.e. the actual sha512.
func (id *ID) RawBytes() (b []byte) {
	bignum := big.Int(*id)
	b_raw := (&bignum).Bytes()
	bytes64 := make([]byte, 64)

	padding := 64 - len(b_raw)
	// Can't use copy!
	// It doesn't properly handle leading zeros
	// copy(bytes64, b_raw)
	for i, bb := range b_raw {
		bytes64[padding+i] = bb
	}
	return bytes64[:]
}
Beispiel #7
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// ipv6AddrInit is called once at init()
func ipv6AddrInit() {
	// Sorted for human readability
	ipv6AddrAttrs = []AttrName{
		"size", // Same position as in IPv6 for output consistency
		"uint128",
	}

	ipv6AddrAttrMap = map[AttrName]func(ipv6 IPv6Addr) string{
		"size": func(ipv6 IPv6Addr) string {
			netSize := big.NewInt(1)
			netSize = netSize.Lsh(netSize, uint(IPv6len*8-ipv6.Maskbits()))
			return netSize.Text(10)
		},
		"uint128": func(ipv6 IPv6Addr) string {
			b := big.Int(*ipv6.Address)
			return b.Text(10)
		},
	}
}
Beispiel #8
0
Datei: id.go Projekt: etcenter/c4
// Bytes encodes the written bytes to C4 ID format.
func (id *ID) Bytes() []byte {
	var bigNum big.Int
	bigID := big.Int(*id)
	bigNum.Set(&bigID)
	bigBase := big.NewInt(base)
	bigZero := big.NewInt(0)
	bigMod := new(big.Int)
	var encoded []byte
	for bigNum.Cmp(bigZero) > 0 {
		bigNum.DivMod(&bigNum, bigBase, bigMod)
		encoded = append([]byte{charset[bigMod.Int64()]}, encoded...)
	}
	// padding
	diff := idlen - 2 - len(encoded)
	encoded = append(bytes.Repeat(lowbyte, diff), encoded...)
	// c4... prefix
	encoded = append(prefix, encoded...)
	return encoded
}
Beispiel #9
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func TestAllFFFF(t *testing.T) {
	is := is.New(t)
	var b []byte
	for i := 0; i < 64; i++ {
		b = append(b, 0xFF)
	}
	bignum := big.NewInt(0)
	bignum = bignum.SetBytes(b)
	id := asset.ID(*bignum)
	is.Equal(id.String(), `c467RPWkcUr5dga8jgywjSup7CMoA9FNqkNjEFgAkEpF9vNktFnx77e2Js11EDL3BNu9MaKFUbacZRt1HYym4b8RNp`)

	id2, err := asset.ParseID(`c467RPWkcUr5dga8jgywjSup7CMoA9FNqkNjEFgAkEpF9vNktFnx77e2Js11EDL3BNu9MaKFUbacZRt1HYym4b8RNp`)
	is.NoErr(err)
	bignum2 := big.Int(*id2)
	b = (&bignum2).Bytes()
	for _, bb := range b {
		is.Equal(bb, 0xFF)
	}
}
Beispiel #10
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func TestAll0000(t *testing.T) {
	is := is.New(t)
	var b []byte
	for i := 0; i < 64; i++ {
		b = append(b, 0x00)
	}
	bignum := big.NewInt(0)
	bignum = bignum.SetBytes(b)
	id := asset.ID(*bignum)
	is.Equal(id.String(), `c41111111111111111111111111111111111111111111111111111111111111111111111111111111111111111`)

	id2, err := asset.ParseID(`c41111111111111111111111111111111111111111111111111111111111111111111111111111111111111111`)
	is.NoErr(err)
	bignum2 := big.Int(*id2)
	b = (&bignum2).Bytes()
	// This loop is unnecessary, bignum zero has only 1 byte.
	for _, bb := range b {
		is.Equal(bb, 0x00)
	}
}
Beispiel #11
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// NetIPMask create a new net.IPMask from the IPv6Addr.
func (ipv6 IPv6Addr) NetIPMask() *net.IPMask {
	ipv6Mask := make(net.IPMask, IPv6len)
	m := big.Int(*ipv6.Mask)
	copy(ipv6Mask, m.Bytes())
	return &ipv6Mask
}
Beispiel #12
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// AddressHexString returns a string with the IPv6Addr address represented as
// a sequence of hex characters.  This method is useful for debugging or by
// operators who want to inspect an address.
func (ipv6 IPv6Addr) AddressHexString() string {
	bi := big.Int(*ipv6.Address)
	return fmt.Sprintf("%032s", bi.Text(16))
}
Beispiel #13
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// AddressBinString returns a string with the IPv6Addr's Address represented
// as a sequence of '0' and '1' characters.  This method is useful for
// debugging or by operators who want to inspect an address.
func (ipv6 IPv6Addr) AddressBinString() string {
	bi := big.Int(*ipv6.Address)
	return fmt.Sprintf("%0128s", bi.Text(2))
}