libgo: Update to weekly.2011-12-02.

From-SVN: r182295

6 files changed, 67 insertions, 51 deletions

diff --git a/libgo/go/hash/adler32/adler32.go b/libgo/go/hash/adler32/adler32.go
index 10bed2f..8103a89 100644
--- a/libgo/go/hash/adler32/adler32.go
+++ b/libgo/go/hash/adler32/adler32.go
@@ -71,14 +71,13 @@ func (d *digest) Write(p []byte) (nn int, err error) {
 
 func (d *digest) Sum32() uint32 { return finish(d.a, d.b) }
 
-func (d *digest) Sum() []byte {
-	p := make([]byte, 4)
+func (d *digest) Sum(in []byte) []byte {
 	s := d.Sum32()
-	p[0] = byte(s >> 24)
-	p[1] = byte(s >> 16)
-	p[2] = byte(s >> 8)
-	p[3] = byte(s)
-	return p
+	in = append(in, byte(s>>24))
+	in = append(in, byte(s>>16))
+	in = append(in, byte(s>>8))
+	in = append(in, byte(s))
+	return in
 }
 
 // Checksum returns the Adler-32 checksum of data.
diff --git a/libgo/go/hash/crc32/crc32.go b/libgo/go/hash/crc32/crc32.go
index 5980ec0..557fab8 100644
--- a/libgo/go/hash/crc32/crc32.go
+++ b/libgo/go/hash/crc32/crc32.go
@@ -119,14 +119,13 @@ func (d *digest) Write(p []byte) (n int, err error) {
 
 func (d *digest) Sum32() uint32 { return d.crc }
 
-func (d *digest) Sum() []byte {
-	p := make([]byte, 4)
+func (d *digest) Sum(in []byte) []byte {
 	s := d.Sum32()
-	p[0] = byte(s >> 24)
-	p[1] = byte(s >> 16)
-	p[2] = byte(s >> 8)
-	p[3] = byte(s)
-	return p
+	in = append(in, byte(s>>24))
+	in = append(in, byte(s>>16))
+	in = append(in, byte(s>>8))
+	in = append(in, byte(s))
+	return in
 }
 
 // Checksum returns the CRC-32 checksum of data
diff --git a/libgo/go/hash/crc64/crc64.go b/libgo/go/hash/crc64/crc64.go
index 42e53c3..e5c1db4 100644
--- a/libgo/go/hash/crc64/crc64.go
+++ b/libgo/go/hash/crc64/crc64.go
@@ -75,18 +75,17 @@ func (d *digest) Write(p []byte) (n int, err error) {
 
 func (d *digest) Sum64() uint64 { return d.crc }
 
-func (d *digest) Sum() []byte {
-	p := make([]byte, 8)
+func (d *digest) Sum(in []byte) []byte {
 	s := d.Sum64()
-	p[0] = byte(s >> 56)
-	p[1] = byte(s >> 48)
-	p[2] = byte(s >> 40)
-	p[3] = byte(s >> 32)
-	p[4] = byte(s >> 24)
-	p[5] = byte(s >> 16)
-	p[6] = byte(s >> 8)
-	p[7] = byte(s)
-	return p
+	in = append(in, byte(s>>56))
+	in = append(in, byte(s>>48))
+	in = append(in, byte(s>>40))
+	in = append(in, byte(s>>32))
+	in = append(in, byte(s>>24))
+	in = append(in, byte(s>>16))
+	in = append(in, byte(s>>8))
+	in = append(in, byte(s))
+	return in
 }
 
 // Checksum returns the CRC-64 checksum of data
diff --git a/libgo/go/hash/fnv/fnv.go b/libgo/go/hash/fnv/fnv.go
index ce3ed0d..2c8a251 100644
--- a/libgo/go/hash/fnv/fnv.go
+++ b/libgo/go/hash/fnv/fnv.go
@@ -8,7 +8,6 @@
 package fnv
 
 import (
-	"encoding/binary"
 	"hash"
 )
 
@@ -105,26 +104,46 @@ func (s *sum32a) Size() int { return 4 }
 func (s *sum64) Size() int  { return 8 }
 func (s *sum64a) Size() int { return 8 }
 
-func (s *sum32) Sum() []byte {
-	a := make([]byte, 4)
-	binary.BigEndian.PutUint32(a, uint32(*s))
-	return a
+func (s *sum32) Sum(in []byte) []byte {
+	v := uint32(*s)
+	in = append(in, byte(v>>24))
+	in = append(in, byte(v>>16))
+	in = append(in, byte(v>>8))
+	in = append(in, byte(v))
+	return in
 }
 
-func (s *sum32a) Sum() []byte {
-	a := make([]byte, 4)
-	binary.BigEndian.PutUint32(a, uint32(*s))
-	return a
+func (s *sum32a) Sum(in []byte) []byte {
+	v := uint32(*s)
+	in = append(in, byte(v>>24))
+	in = append(in, byte(v>>16))
+	in = append(in, byte(v>>8))
+	in = append(in, byte(v))
+	return in
 }
 
-func (s *sum64) Sum() []byte {
-	a := make([]byte, 8)
-	binary.BigEndian.PutUint64(a, uint64(*s))
-	return a
+func (s *sum64) Sum(in []byte) []byte {
+	v := uint64(*s)
+	in = append(in, byte(v>>56))
+	in = append(in, byte(v>>48))
+	in = append(in, byte(v>>40))
+	in = append(in, byte(v>>32))
+	in = append(in, byte(v>>24))
+	in = append(in, byte(v>>16))
+	in = append(in, byte(v>>8))
+	in = append(in, byte(v))
+	return in
 }
 
-func (s *sum64a) Sum() []byte {
-	a := make([]byte, 8)
-	binary.BigEndian.PutUint64(a, uint64(*s))
-	return a
+func (s *sum64a) Sum(in []byte) []byte {
+	v := uint64(*s)
+	in = append(in, byte(v>>56))
+	in = append(in, byte(v>>48))
+	in = append(in, byte(v>>40))
+	in = append(in, byte(v>>32))
+	in = append(in, byte(v>>24))
+	in = append(in, byte(v>>16))
+	in = append(in, byte(v>>8))
+	in = append(in, byte(v))
+	return in
 }
diff --git a/libgo/go/hash/fnv/fnv_test.go b/libgo/go/hash/fnv/fnv_test.go
index 429230c..17454de 100644
--- a/libgo/go/hash/fnv/fnv_test.go
+++ b/libgo/go/hash/fnv/fnv_test.go
@@ -72,7 +72,7 @@ func testGolden(t *testing.T, hash hash.Hash, gold []golden) {
 		if done != len(g.text) {
 			t.Fatalf("wrote only %d out of %d bytes", done, len(g.text))
 		}
-		if actual := hash.Sum(); !bytes.Equal(g.sum, actual) {
+		if actual := hash.Sum(nil); !bytes.Equal(g.sum, actual) {
 			t.Errorf("hash(%q) = 0x%x want 0x%x", g.text, actual, g.sum)
 		}
 	}
@@ -97,26 +97,26 @@ func TestIntegrity64a(t *testing.T) {
 func testIntegrity(t *testing.T, h hash.Hash) {
 	data := []byte{'1', '2', 3, 4, 5}
 	h.Write(data)
-	sum := h.Sum()
+	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(); !bytes.Equal(sum, a) {
+	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(); !bytes.Equal(sum, a) {
+	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(); !bytes.Equal(sum, a) {
+	if a := h.Sum(nil); !bytes.Equal(sum, a) {
 		t.Fatalf("Sum()=0x%x, but with partial writes, Sum()=0x%x", sum, a)
 	}
 
@@ -162,6 +162,6 @@ func benchmark(b *testing.B, h hash.Hash) {
 	for todo := b.N; todo != 0; todo-- {
 		h.Reset()
 		h.Write(data)
-		h.Sum()
+		h.Sum(nil)
 	}
 }
diff --git a/libgo/go/hash/hash.go b/libgo/go/hash/hash.go
index 3536c0b..0d7765d 100644
--- a/libgo/go/hash/hash.go
+++ b/libgo/go/hash/hash.go
@@ -13,9 +13,9 @@ type Hash interface {
 	// It never returns an error.
 	io.Writer
 
-	// Sum returns the current hash, without changing the
-	// underlying hash state.
-	Sum() []byte
+	// Sum appends the current hash in the same manner as append(), without
+	// changing the underlying hash state.
+	Sum(in []byte) []byte
 
 	// Reset resets the hash to one with zero bytes written.
 	Reset()