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-rw-r--r--src/hash/fnv/fnv.go371
-rw-r--r--src/hash/fnv/fnv_test.go255
2 files changed, 626 insertions, 0 deletions
diff --git a/src/hash/fnv/fnv.go b/src/hash/fnv/fnv.go
new file mode 100644
index 0000000..0fce177
--- /dev/null
+++ b/src/hash/fnv/fnv.go
@@ -0,0 +1,371 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package fnv implements FNV-1 and FNV-1a, non-cryptographic hash functions
+// created by Glenn Fowler, Landon Curt Noll, and Phong Vo.
+// See
+// https://en.wikipedia.org/wiki/Fowler-Noll-Vo_hash_function.
+//
+// All the hash.Hash implementations returned by this package also
+// implement encoding.BinaryMarshaler and encoding.BinaryUnmarshaler to
+// marshal and unmarshal the internal state of the hash.
+package fnv
+
+import (
+ "errors"
+ "hash"
+ "math/bits"
+)
+
+type (
+ sum32 uint32
+ sum32a uint32
+ sum64 uint64
+ sum64a uint64
+ sum128 [2]uint64
+ sum128a [2]uint64
+)
+
+const (
+ offset32 = 2166136261
+ offset64 = 14695981039346656037
+ offset128Lower = 0x62b821756295c58d
+ offset128Higher = 0x6c62272e07bb0142
+ prime32 = 16777619
+ prime64 = 1099511628211
+ prime128Lower = 0x13b
+ prime128Shift = 24
+)
+
+// New32 returns a new 32-bit FNV-1 hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New32() hash.Hash32 {
+ var s sum32 = offset32
+ return &s
+}
+
+// New32a returns a new 32-bit FNV-1a hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New32a() hash.Hash32 {
+ var s sum32a = offset32
+ return &s
+}
+
+// New64 returns a new 64-bit FNV-1 hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New64() hash.Hash64 {
+ var s sum64 = offset64
+ return &s
+}
+
+// New64a returns a new 64-bit FNV-1a hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New64a() hash.Hash64 {
+ var s sum64a = offset64
+ return &s
+}
+
+// New128 returns a new 128-bit FNV-1 hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New128() hash.Hash {
+ var s sum128
+ s[0] = offset128Higher
+ s[1] = offset128Lower
+ return &s
+}
+
+// New128a returns a new 128-bit FNV-1a hash.Hash.
+// Its Sum method will lay the value out in big-endian byte order.
+func New128a() hash.Hash {
+ var s sum128a
+ s[0] = offset128Higher
+ s[1] = offset128Lower
+ return &s
+}
+
+func (s *sum32) Reset() { *s = offset32 }
+func (s *sum32a) Reset() { *s = offset32 }
+func (s *sum64) Reset() { *s = offset64 }
+func (s *sum64a) Reset() { *s = offset64 }
+func (s *sum128) Reset() { s[0] = offset128Higher; s[1] = offset128Lower }
+func (s *sum128a) Reset() { s[0] = offset128Higher; s[1] = offset128Lower }
+
+func (s *sum32) Sum32() uint32 { return uint32(*s) }
+func (s *sum32a) Sum32() uint32 { return uint32(*s) }
+func (s *sum64) Sum64() uint64 { return uint64(*s) }
+func (s *sum64a) Sum64() uint64 { return uint64(*s) }
+
+func (s *sum32) Write(data []byte) (int, error) {
+ hash := *s
+ for _, c := range data {
+ hash *= prime32
+ hash ^= sum32(c)
+ }
+ *s = hash
+ return len(data), nil
+}
+
+func (s *sum32a) Write(data []byte) (int, error) {
+ hash := *s
+ for _, c := range data {
+ hash ^= sum32a(c)
+ hash *= prime32
+ }
+ *s = hash
+ return len(data), nil
+}
+
+func (s *sum64) Write(data []byte) (int, error) {
+ hash := *s
+ for _, c := range data {
+ hash *= prime64
+ hash ^= sum64(c)
+ }
+ *s = hash
+ return len(data), nil
+}
+
+func (s *sum64a) Write(data []byte) (int, error) {
+ hash := *s
+ for _, c := range data {
+ hash ^= sum64a(c)
+ hash *= prime64
+ }
+ *s = hash
+ return len(data), nil
+}
+
+func (s *sum128) Write(data []byte) (int, error) {
+ for _, c := range data {
+ // Compute the multiplication
+ s0, s1 := bits.Mul64(prime128Lower, s[1])
+ s0 += s[1]<<prime128Shift + prime128Lower*s[0]
+ // Update the values
+ s[1] = s1
+ s[0] = s0
+ s[1] ^= uint64(c)
+ }
+ return len(data), nil
+}
+
+func (s *sum128a) Write(data []byte) (int, error) {
+ for _, c := range data {
+ s[1] ^= uint64(c)
+ // Compute the multiplication
+ s0, s1 := bits.Mul64(prime128Lower, s[1])
+ s0 += s[1]<<prime128Shift + prime128Lower*s[0]
+ // Update the values
+ s[1] = s1
+ s[0] = s0
+ }
+ return len(data), nil
+}
+
+func (s *sum32) Size() int { return 4 }
+func (s *sum32a) Size() int { return 4 }
+func (s *sum64) Size() int { return 8 }
+func (s *sum64a) Size() int { return 8 }
+func (s *sum128) Size() int { return 16 }
+func (s *sum128a) Size() int { return 16 }
+
+func (s *sum32) BlockSize() int { return 1 }
+func (s *sum32a) BlockSize() int { return 1 }
+func (s *sum64) BlockSize() int { return 1 }
+func (s *sum64a) BlockSize() int { return 1 }
+func (s *sum128) BlockSize() int { return 1 }
+func (s *sum128a) BlockSize() int { return 1 }
+
+func (s *sum32) Sum(in []byte) []byte {
+ v := uint32(*s)
+ return append(in, byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
+}
+
+func (s *sum32a) Sum(in []byte) []byte {
+ v := uint32(*s)
+ return append(in, byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
+}
+
+func (s *sum64) Sum(in []byte) []byte {
+ v := uint64(*s)
+ return append(in, byte(v>>56), byte(v>>48), byte(v>>40), byte(v>>32), byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
+}
+
+func (s *sum64a) Sum(in []byte) []byte {
+ v := uint64(*s)
+ return append(in, byte(v>>56), byte(v>>48), byte(v>>40), byte(v>>32), byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
+}
+
+func (s *sum128) Sum(in []byte) []byte {
+ return append(in,
+ byte(s[0]>>56), byte(s[0]>>48), byte(s[0]>>40), byte(s[0]>>32), byte(s[0]>>24), byte(s[0]>>16), byte(s[0]>>8), byte(s[0]),
+ byte(s[1]>>56), byte(s[1]>>48), byte(s[1]>>40), byte(s[1]>>32), byte(s[1]>>24), byte(s[1]>>16), byte(s[1]>>8), byte(s[1]),
+ )
+}
+
+func (s *sum128a) Sum(in []byte) []byte {
+ return append(in,
+ byte(s[0]>>56), byte(s[0]>>48), byte(s[0]>>40), byte(s[0]>>32), byte(s[0]>>24), byte(s[0]>>16), byte(s[0]>>8), byte(s[0]),
+ byte(s[1]>>56), byte(s[1]>>48), byte(s[1]>>40), byte(s[1]>>32), byte(s[1]>>24), byte(s[1]>>16), byte(s[1]>>8), byte(s[1]),
+ )
+}
+
+const (
+ magic32 = "fnv\x01"
+ magic32a = "fnv\x02"
+ magic64 = "fnv\x03"
+ magic64a = "fnv\x04"
+ magic128 = "fnv\x05"
+ magic128a = "fnv\x06"
+ marshaledSize32 = len(magic32) + 4
+ marshaledSize64 = len(magic64) + 8
+ marshaledSize128 = len(magic128) + 8*2
+)
+
+func (s *sum32) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize32)
+ b = append(b, magic32...)
+ b = appendUint32(b, uint32(*s))
+ return b, nil
+}
+
+func (s *sum32a) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize32)
+ b = append(b, magic32a...)
+ b = appendUint32(b, uint32(*s))
+ return b, nil
+}
+
+func (s *sum64) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize64)
+ b = append(b, magic64...)
+ b = appendUint64(b, uint64(*s))
+ return b, nil
+
+}
+
+func (s *sum64a) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize64)
+ b = append(b, magic64a...)
+ b = appendUint64(b, uint64(*s))
+ return b, nil
+}
+
+func (s *sum128) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize128)
+ b = append(b, magic128...)
+ b = appendUint64(b, s[0])
+ b = appendUint64(b, s[1])
+ return b, nil
+}
+
+func (s *sum128a) MarshalBinary() ([]byte, error) {
+ b := make([]byte, 0, marshaledSize128)
+ b = append(b, magic128a...)
+ b = appendUint64(b, s[0])
+ b = appendUint64(b, s[1])
+ return b, nil
+}
+
+func (s *sum32) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic32) || string(b[:len(magic32)]) != magic32 {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize32 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ *s = sum32(readUint32(b[4:]))
+ return nil
+}
+
+func (s *sum32a) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic32a) || string(b[:len(magic32a)]) != magic32a {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize32 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ *s = sum32a(readUint32(b[4:]))
+ return nil
+}
+
+func (s *sum64) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic64) || string(b[:len(magic64)]) != magic64 {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize64 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ *s = sum64(readUint64(b[4:]))
+ return nil
+}
+
+func (s *sum64a) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic64a) || string(b[:len(magic64a)]) != magic64a {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize64 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ *s = sum64a(readUint64(b[4:]))
+ return nil
+}
+
+func (s *sum128) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic128) || string(b[:len(magic128)]) != magic128 {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize128 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ s[0] = readUint64(b[4:])
+ s[1] = readUint64(b[12:])
+ return nil
+}
+
+func (s *sum128a) UnmarshalBinary(b []byte) error {
+ if len(b) < len(magic128a) || string(b[:len(magic128a)]) != magic128a {
+ return errors.New("hash/fnv: invalid hash state identifier")
+ }
+ if len(b) != marshaledSize128 {
+ return errors.New("hash/fnv: invalid hash state size")
+ }
+ s[0] = readUint64(b[4:])
+ s[1] = readUint64(b[12:])
+ return nil
+}
+
+func readUint32(b []byte) uint32 {
+ _ = b[3]
+ return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
+}
+
+func appendUint32(b []byte, x uint32) []byte {
+ a := [4]byte{
+ byte(x >> 24),
+ byte(x >> 16),
+ byte(x >> 8),
+ byte(x),
+ }
+ return append(b, a[:]...)
+}
+
+func appendUint64(b []byte, x uint64) []byte {
+ a := [8]byte{
+ byte(x >> 56),
+ byte(x >> 48),
+ byte(x >> 40),
+ byte(x >> 32),
+ byte(x >> 24),
+ byte(x >> 16),
+ byte(x >> 8),
+ byte(x),
+ }
+ return append(b, a[:]...)
+}
+
+func readUint64(b []byte) uint64 {
+ _ = b[7]
+ return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |
+ uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56
+}
diff --git a/src/hash/fnv/fnv_test.go b/src/hash/fnv/fnv_test.go
new file mode 100644
index 0000000..7b1f7a3
--- /dev/null
+++ b/src/hash/fnv/fnv_test.go
@@ -0,0 +1,255 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fnv
+
+import (
+ "bytes"
+ "encoding"
+ "encoding/binary"
+ "hash"
+ "io"
+ "testing"
+)
+
+type golden struct {
+ out []byte
+ in string
+ halfState string // marshaled hash state after first half of in written, used by TestGoldenMarshal
+}
+
+var golden32 = []golden{
+ {[]byte{0x81, 0x1c, 0x9d, 0xc5}, "", "fnv\x01\x81\x1c\x9d\xc5"},
+ {[]byte{0x05, 0x0c, 0x5d, 0x7e}, "a", "fnv\x01\x81\x1c\x9d\xc5"},
+ {[]byte{0x70, 0x77, 0x2d, 0x38}, "ab", "fnv\x01\x05\f]~"},
+ {[]byte{0x43, 0x9c, 0x2f, 0x4b}, "abc", "fnv\x01\x05\f]~"},
+}
+
+var golden32a = []golden{
+ {[]byte{0x81, 0x1c, 0x9d, 0xc5}, "", "fnv\x02\x81\x1c\x9d\xc5"},
+ {[]byte{0xe4, 0x0c, 0x29, 0x2c}, "a", "fnv\x02\x81\x1c\x9d\xc5"},
+ {[]byte{0x4d, 0x25, 0x05, 0xca}, "ab", "fnv\x02\xe4\f),"},
+ {[]byte{0x1a, 0x47, 0xe9, 0x0b}, "abc", "fnv\x02\xe4\f),"},
+}
+
+var golden64 = []golden{
+ {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, "", "fnv\x03\xcb\xf2\x9c\xe4\x84\"#%"},
+ {[]byte{0xaf, 0x63, 0xbd, 0x4c, 0x86, 0x01, 0xb7, 0xbe}, "a", "fnv\x03\xcb\xf2\x9c\xe4\x84\"#%"},
+ {[]byte{0x08, 0x32, 0x67, 0x07, 0xb4, 0xeb, 0x37, 0xb8}, "ab", "fnv\x03\xafc\xbdL\x86\x01\xb7\xbe"},
+ {[]byte{0xd8, 0xdc, 0xca, 0x18, 0x6b, 0xaf, 0xad, 0xcb}, "abc", "fnv\x03\xafc\xbdL\x86\x01\xb7\xbe"},
+}
+
+var golden64a = []golden{
+ {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, "", "fnv\x04\xcb\xf2\x9c\xe4\x84\"#%"},
+ {[]byte{0xaf, 0x63, 0xdc, 0x4c, 0x86, 0x01, 0xec, 0x8c}, "a", "fnv\x04\xcb\xf2\x9c\xe4\x84\"#%"},
+ {[]byte{0x08, 0x9c, 0x44, 0x07, 0xb5, 0x45, 0x98, 0x6a}, "ab", "fnv\x04\xafc\xdcL\x86\x01\xec\x8c"},
+ {[]byte{0xe7, 0x1f, 0xa2, 0x19, 0x05, 0x41, 0x57, 0x4b}, "abc", "fnv\x04\xafc\xdcL\x86\x01\xec\x8c"},
+}
+
+var golden128 = []golden{
+ {[]byte{0x6c, 0x62, 0x27, 0x2e, 0x07, 0xbb, 0x01, 0x42, 0x62, 0xb8, 0x21, 0x75, 0x62, 0x95, 0xc5, 0x8d}, "", "fnv\x05lb'.\a\xbb\x01Bb\xb8!ub\x95ō"},
+ {[]byte{0xd2, 0x28, 0xcb, 0x69, 0x10, 0x1a, 0x8c, 0xaf, 0x78, 0x91, 0x2b, 0x70, 0x4e, 0x4a, 0x14, 0x1e}, "a", "fnv\x05lb'.\a\xbb\x01Bb\xb8!ub\x95ō"},
+ {[]byte{0x8, 0x80, 0x94, 0x5a, 0xee, 0xab, 0x1b, 0xe9, 0x5a, 0xa0, 0x73, 0x30, 0x55, 0x26, 0xc0, 0x88}, "ab", "fnv\x05\xd2(\xcbi\x10\x1a\x8c\xafx\x91+pNJ\x14\x1e"},
+ {[]byte{0xa6, 0x8b, 0xb2, 0xa4, 0x34, 0x8b, 0x58, 0x22, 0x83, 0x6d, 0xbc, 0x78, 0xc6, 0xae, 0xe7, 0x3b}, "abc", "fnv\x05\xd2(\xcbi\x10\x1a\x8c\xafx\x91+pNJ\x14\x1e"},
+}
+
+var golden128a = []golden{
+ {[]byte{0x6c, 0x62, 0x27, 0x2e, 0x07, 0xbb, 0x01, 0x42, 0x62, 0xb8, 0x21, 0x75, 0x62, 0x95, 0xc5, 0x8d}, "", "fnv\x06lb'.\a\xbb\x01Bb\xb8!ub\x95ō"},
+ {[]byte{0xd2, 0x28, 0xcb, 0x69, 0x6f, 0x1a, 0x8c, 0xaf, 0x78, 0x91, 0x2b, 0x70, 0x4e, 0x4a, 0x89, 0x64}, "a", "fnv\x06lb'.\a\xbb\x01Bb\xb8!ub\x95ō"},
+ {[]byte{0x08, 0x80, 0x95, 0x44, 0xbb, 0xab, 0x1b, 0xe9, 0x5a, 0xa0, 0x73, 0x30, 0x55, 0xb6, 0x9a, 0x62}, "ab", "fnv\x06\xd2(\xcbio\x1a\x8c\xafx\x91+pNJ\x89d"},
+ {[]byte{0xa6, 0x8d, 0x62, 0x2c, 0xec, 0x8b, 0x58, 0x22, 0x83, 0x6d, 0xbc, 0x79, 0x77, 0xaf, 0x7f, 0x3b}, "abc", "fnv\x06\xd2(\xcbio\x1a\x8c\xafx\x91+pNJ\x89d"},
+}
+
+func TestGolden32(t *testing.T) {
+ testGolden(t, New32(), golden32)
+}
+
+func TestGolden32a(t *testing.T) {
+ testGolden(t, New32a(), golden32a)
+}
+
+func TestGolden64(t *testing.T) {
+ testGolden(t, New64(), golden64)
+}
+
+func TestGolden64a(t *testing.T) {
+ testGolden(t, New64a(), golden64a)
+}
+
+func TestGolden128(t *testing.T) {
+ testGolden(t, New128(), golden128)
+}
+
+func TestGolden128a(t *testing.T) {
+ testGolden(t, New128a(), golden128a)
+}
+
+func testGolden(t *testing.T, hash hash.Hash, gold []golden) {
+ for _, g := range gold {
+ hash.Reset()
+ done, error := hash.Write([]byte(g.in))
+ if error != nil {
+ t.Fatalf("write error: %s", error)
+ }
+ if done != len(g.in) {
+ t.Fatalf("wrote only %d out of %d bytes", done, len(g.in))
+ }
+ if actual := hash.Sum(nil); !bytes.Equal(g.out, actual) {
+ t.Errorf("hash(%q) = 0x%x want 0x%x", g.in, actual, g.out)
+ }
+ }
+}
+
+func TestGoldenMarshal(t *testing.T) {
+ tests := []struct {
+ name string
+ newHash func() hash.Hash
+ gold []golden
+ }{
+ {"32", func() hash.Hash { return New32() }, golden32},
+ {"32a", func() hash.Hash { return New32a() }, golden32a},
+ {"64", func() hash.Hash { return New64() }, golden64},
+ {"64a", func() hash.Hash { return New64a() }, golden64a},
+ {"128", func() hash.Hash { return New128() }, golden128},
+ {"128a", func() hash.Hash { return New128a() }, golden128a},
+ }
+ for _, tt := range tests {
+ t.Run(tt.name, func(t *testing.T) {
+ for _, g := range tt.gold {
+ h := tt.newHash()
+ h2 := tt.newHash()
+
+ io.WriteString(h, g.in[:len(g.in)/2])
+
+ state, err := h.(encoding.BinaryMarshaler).MarshalBinary()
+ if err != nil {
+ t.Errorf("could not marshal: %v", err)
+ continue
+ }
+
+ if string(state) != g.halfState {
+ t.Errorf("checksum(%q) state = %q, want %q", g.in, state, g.halfState)
+ continue
+ }
+
+ if err := h2.(encoding.BinaryUnmarshaler).UnmarshalBinary(state); err != nil {
+ t.Errorf("could not unmarshal: %v", err)
+ continue
+ }
+
+ io.WriteString(h, g.in[len(g.in)/2:])
+ io.WriteString(h2, g.in[len(g.in)/2:])
+
+ if actual, actual2 := h.Sum(nil), h2.Sum(nil); !bytes.Equal(actual, actual2) {
+ t.Errorf("hash(%q) = 0x%x != marshaled 0x%x", g.in, actual, actual2)
+ }
+ }
+ })
+ }
+}
+
+func TestIntegrity32(t *testing.T) {
+ testIntegrity(t, New32())
+}
+
+func TestIntegrity32a(t *testing.T) {
+ testIntegrity(t, New32a())
+}
+
+func TestIntegrity64(t *testing.T) {
+ testIntegrity(t, New64())
+}
+
+func TestIntegrity64a(t *testing.T) {
+ testIntegrity(t, New64a())
+}
+func TestIntegrity128(t *testing.T) {
+ testIntegrity(t, New128())
+}
+
+func TestIntegrity128a(t *testing.T) {
+ testIntegrity(t, New128a())
+}
+
+func testIntegrity(t *testing.T, h hash.Hash) {
+ data := []byte{'1', '2', 3, 4, 5}
+ h.Write(data)
+ sum := h.Sum(nil)
+
+ if size := h.Size(); size != len(sum) {
+ t.Fatalf("Size()=%d but len(Sum())=%d", size, len(sum))
+ }
+
+ if a := h.Sum(nil); !bytes.Equal(sum, a) {
+ t.Fatalf("first Sum()=0x%x, second Sum()=0x%x", sum, a)
+ }
+
+ h.Reset()
+ h.Write(data)
+ if a := h.Sum(nil); !bytes.Equal(sum, a) {
+ t.Fatalf("Sum()=0x%x, but after Reset() Sum()=0x%x", sum, a)
+ }
+
+ h.Reset()
+ h.Write(data[:2])
+ h.Write(data[2:])
+ if a := h.Sum(nil); !bytes.Equal(sum, a) {
+ t.Fatalf("Sum()=0x%x, but with partial writes, Sum()=0x%x", sum, a)
+ }
+
+ switch h.Size() {
+ case 4:
+ sum32 := h.(hash.Hash32).Sum32()
+ if sum32 != binary.BigEndian.Uint32(sum) {
+ t.Fatalf("Sum()=0x%x, but Sum32()=0x%x", sum, sum32)
+ }
+ case 8:
+ sum64 := h.(hash.Hash64).Sum64()
+ if sum64 != binary.BigEndian.Uint64(sum) {
+ t.Fatalf("Sum()=0x%x, but Sum64()=0x%x", sum, sum64)
+ }
+ case 16:
+ // There's no Sum128 function, so we don't need to test anything here.
+ }
+}
+
+func BenchmarkFnv32KB(b *testing.B) {
+ benchmarkKB(b, New32())
+}
+
+func BenchmarkFnv32aKB(b *testing.B) {
+ benchmarkKB(b, New32a())
+}
+
+func BenchmarkFnv64KB(b *testing.B) {
+ benchmarkKB(b, New64())
+}
+
+func BenchmarkFnv64aKB(b *testing.B) {
+ benchmarkKB(b, New64a())
+}
+
+func BenchmarkFnv128KB(b *testing.B) {
+ benchmarkKB(b, New128())
+}
+
+func BenchmarkFnv128aKB(b *testing.B) {
+ benchmarkKB(b, New128a())
+}
+
+func benchmarkKB(b *testing.B, h hash.Hash) {
+ b.SetBytes(1024)
+ data := make([]byte, 1024)
+ for i := range data {
+ data[i] = byte(i)
+ }
+ in := make([]byte, 0, h.Size())
+
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ h.Reset()
+ h.Write(data)
+ h.Sum(in)
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 11:13:33 +0000