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utf8: make EncodeRune's destination the first argument.

Browse Source 
R=r
CC=golang-dev
https://golang.org/cl/3364041
This commit is contained in:
Adam Langley 2010-11-30 16:59:43 -05:00
parent 287045085d
commit 3cb4bdb9ce
14 changed files with 21 additions and 233 deletions
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2
src/pkg/bufio/bufio.go
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@ -482,7 +482,7 @@ func (b *Writer) WriteRune(rune int) (size int, err os.Error) {
return b.WriteString(string(rune))
}
}
size = utf8.EncodeRune(rune, b.buf[b.n:])
size = utf8.EncodeRune(b.buf[b.n:], rune)
b.n += size
return size, nil
}

4
src/pkg/bufio/bufio_test.go
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@ -337,7 +337,7 @@ func TestReadWriteRune(t *testing.T) {
// Write the runes out using WriteRune
buf := make([]byte, utf8.UTFMax)
for rune := 0; rune < NRune; rune++ {
size := utf8.EncodeRune(rune, buf)
size := utf8.EncodeRune(buf, rune)
nbytes, err := w.WriteRune(rune)
if err != nil {
t.Fatalf("WriteRune(0x%x) error: %s", rune, err)
@ -351,7 +351,7 @@ func TestReadWriteRune(t *testing.T) {
r := NewReader(byteBuf)
// Read them back with ReadRune
for rune := 0; rune < NRune; rune++ {
size := utf8.EncodeRune(rune, buf)
size := utf8.EncodeRune(buf, rune)
nr, nbytes, err := r.ReadRune()
if nr != rune || nbytes != size || err != nil {
t.Fatalf("ReadRune(0x%x) got 0x%x,%d not 0x%x,%d (err=%s)", r, nr, nbytes, r, size, err)

2
src/pkg/bytes/buffer.go
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@ -172,7 +172,7 @@ func (b *Buffer) WriteRune(r int) (n int, err os.Error) {
b.WriteByte(byte(r))
return 1, nil
}
n = utf8.EncodeRune(r, b.runeBytes[0:])
n = utf8.EncodeRune(b.runeBytes[0:], r)
b.Write(b.runeBytes[0:n])
return n, nil
}

4
src/pkg/bytes/buffer_test.go
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@ -272,7 +272,7 @@ func TestRuneIO(t *testing.T) {
var buf Buffer
n := 0
for r := 0; r < NRune; r++ {
size := utf8.EncodeRune(r, b[n:])
size := utf8.EncodeRune(b[n:], r)
nbytes, err := buf.WriteRune(r)
if err != nil {
t.Fatalf("WriteRune(0x%x) error: %s", r, err)
@ -291,7 +291,7 @@ func TestRuneIO(t *testing.T) {
// Read it back with ReadRune
for r := 0; r < NRune; r++ {
size := utf8.EncodeRune(r, b)
size := utf8.EncodeRune(b, r)
nr, nbytes, err := buf.ReadRune()
if nr != r || nbytes != size || err != nil {
t.Fatalf("ReadRune(0x%x) got 0x%x,%d not 0x%x,%d (err=%s)", r, nr, nbytes, r, size, err)

2
src/pkg/bytes/bytes.go
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@ -347,7 +347,7 @@ func Map(mapping func(rune int) int, s []byte) []byte {
copy(nb, b[0:nbytes])
b = nb
}
nbytes += utf8.EncodeRune(rune, b[nbytes:maxbytes])
nbytes += utf8.EncodeRune(b[nbytes:maxbytes], rune)
}
i += wid
}

102
src/pkg/crypto/block/cbc_aes_test.go
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@ -1,102 +0,0 @@
// Copyright 2009 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.
// CBC AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 24-29.
package block
import (
"bytes"
"crypto/aes"
"io"
"testing"
)
type cbcTest struct {
name string
key []byte
iv []byte
in []byte
out []byte
}
var cbcAESTests = []cbcTest{
// NIST SP 800-38A pp 27-29
{
"CBC-AES128",
commonKey128,
commonIV,
commonInput,
[]byte{
0x76, 0x49, 0xab, 0xac, 0x81, 0x19, 0xb2, 0x46, 0xce, 0xe9, 0x8e, 0x9b, 0x12, 0xe9, 0x19, 0x7d,
0x50, 0x86, 0xcb, 0x9b, 0x50, 0x72, 0x19, 0xee, 0x95, 0xdb, 0x11, 0x3a, 0x91, 0x76, 0x78, 0xb2,
0x73, 0xbe, 0xd6, 0xb8, 0xe3, 0xc1, 0x74, 0x3b, 0x71, 0x16, 0xe6, 0x9e, 0x22, 0x22, 0x95, 0x16,
0x3f, 0xf1, 0xca, 0xa1, 0x68, 0x1f, 0xac, 0x09, 0x12, 0x0e, 0xca, 0x30, 0x75, 0x86, 0xe1, 0xa7,
},
},
{
"CBC-AES192",
commonKey192,
commonIV,
commonInput,
[]byte{
0x4f, 0x02, 0x1d, 0xb2, 0x43, 0xbc, 0x63, 0x3d, 0x71, 0x78, 0x18, 0x3a, 0x9f, 0xa0, 0x71, 0xe8,
0xb4, 0xd9, 0xad, 0xa9, 0xad, 0x7d, 0xed, 0xf4, 0xe5, 0xe7, 0x38, 0x76, 0x3f, 0x69, 0x14, 0x5a,
0x57, 0x1b, 0x24, 0x20, 0x12, 0xfb, 0x7a, 0xe0, 0x7f, 0xa9, 0xba, 0xac, 0x3d, 0xf1, 0x02, 0xe0,
0x08, 0xb0, 0xe2, 0x79, 0x88, 0x59, 0x88, 0x81, 0xd9, 0x20, 0xa9, 0xe6, 0x4f, 0x56, 0x15, 0xcd,
},
},
{
"CBC-AES256",
commonKey256,
commonIV,
commonInput,
[]byte{
0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba, 0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6,
0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d, 0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d,
0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf, 0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61,
0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc, 0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b,
},
},
}
func TestCBC_AES(t *testing.T) {
for _, tt := range cbcAESTests {
test := tt.name
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
continue
}
var crypt bytes.Buffer
w := NewCBCEncrypter(c, tt.iv, &crypt)
var r io.Reader = bytes.NewBuffer(tt.in)
n, err := io.Copy(w, r)
if n != int64(len(tt.in)) || err != nil {
t.Errorf("%s: CBCEncrypter io.Copy = %d, %v want %d, nil", test, n, err, len(tt.in))
} else if d := crypt.Bytes(); !same(tt.out, d) {
t.Errorf("%s: CBCEncrypter\nhave %x\nwant %x", test, d, tt.out)
}
var plain bytes.Buffer
r = NewCBCDecrypter(c, tt.iv, bytes.NewBuffer(tt.out))
w = &plain
n, err = io.Copy(w, r)
if n != int64(len(tt.out)) || err != nil {
t.Errorf("%s: CBCDecrypter io.Copy = %d, %v want %d, nil", test, n, err, len(tt.out))
} else if d := plain.Bytes(); !same(tt.in, d) {
t.Errorf("%s: CBCDecrypter\nhave %x\nwant %x", test, d, tt.in)
}
if t.Failed() {
break
}
}
}

110
src/pkg/crypto/block/ctr_aes_test.go
View File

@ -1,110 +0,0 @@
// Copyright 2009 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.
// CTR AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 55-58.
package block
import (
"bytes"
"crypto/aes"
"io"
"testing"
)
type ctrTest struct {
name string
key []byte
iv []byte
in []byte
out []byte
}
var commonCounter = []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}
var ctrAESTests = []ctrTest{
// NIST SP 800-38A pp 55-58
{
"CTR-AES128",
commonKey128,
commonCounter,
commonInput,
[]byte{
0x87, 0x4d, 0x61, 0x91, 0xb6, 0x20, 0xe3, 0x26, 0x1b, 0xef, 0x68, 0x64, 0x99, 0x0d, 0xb6, 0xce,
0x98, 0x06, 0xf6, 0x6b, 0x79, 0x70, 0xfd, 0xff, 0x86, 0x17, 0x18, 0x7b, 0xb9, 0xff, 0xfd, 0xff,
0x5a, 0xe4, 0xdf, 0x3e, 0xdb, 0xd5, 0xd3, 0x5e, 0x5b, 0x4f, 0x09, 0x02, 0x0d, 0xb0, 0x3e, 0xab,
0x1e, 0x03, 0x1d, 0xda, 0x2f, 0xbe, 0x03, 0xd1, 0x79, 0x21, 0x70, 0xa0, 0xf3, 0x00, 0x9c, 0xee,
},
},
{
"CTR-AES192",
commonKey192,
commonCounter,
commonInput,
[]byte{
0x1a, 0xbc, 0x93, 0x24, 0x17, 0x52, 0x1c, 0xa2, 0x4f, 0x2b, 0x04, 0x59, 0xfe, 0x7e, 0x6e, 0x0b,
0x09, 0x03, 0x39, 0xec, 0x0a, 0xa6, 0xfa, 0xef, 0xd5, 0xcc, 0xc2, 0xc6, 0xf4, 0xce, 0x8e, 0x94,
0x1e, 0x36, 0xb2, 0x6b, 0xd1, 0xeb, 0xc6, 0x70, 0xd1, 0xbd, 0x1d, 0x66, 0x56, 0x20, 0xab, 0xf7,
0x4f, 0x78, 0xa7, 0xf6, 0xd2, 0x98, 0x09, 0x58, 0x5a, 0x97, 0xda, 0xec, 0x58, 0xc6, 0xb0, 0x50,
},
},
{
"CTR-AES256",
commonKey256,
commonCounter,
commonInput,
[]byte{
0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5, 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a, 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,
0x2b, 0x09, 0x30, 0xda, 0xa2, 0x3d, 0xe9, 0x4c, 0xe8, 0x70, 0x17, 0xba, 0x2d, 0x84, 0x98, 0x8d,
0xdf, 0xc9, 0xc5, 0x8d, 0xb6, 0x7a, 0xad, 0xa6, 0x13, 0xc2, 0xdd, 0x08, 0x45, 0x79, 0x41, 0xa6,
},
},
}
func TestCTR_AES(t *testing.T) {
for _, tt := range ctrAESTests {
test := tt.name
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
continue
}
for j := 0; j <= 5; j += 5 {
var crypt bytes.Buffer
in := tt.in[0 : len(tt.in)-j]
w := NewCTRWriter(c, tt.iv, &crypt)
var r io.Reader = bytes.NewBuffer(in)
n, err := io.Copy(w, r)
if n != int64(len(in)) || err != nil {
t.Errorf("%s/%d: CTRWriter io.Copy = %d, %v want %d, nil", test, len(in), n, err, len(in))
} else if d, out := crypt.Bytes(), tt.out[0:len(in)]; !same(out, d) {
t.Errorf("%s/%d: CTRWriter\ninpt %x\nhave %x\nwant %x", test, len(in), in, d, out)
}
}
for j := 0; j <= 7; j += 7 {
var plain bytes.Buffer
out := tt.out[0 : len(tt.out)-j]
r := NewCTRReader(c, tt.iv, bytes.NewBuffer(out))
w := &plain
n, err := io.Copy(w, r)
if n != int64(len(out)) || err != nil {
t.Errorf("%s/%d: CTRReader io.Copy = %d, %v want %d, nil", test, len(out), n, err, len(out))
} else if d, in := plain.Bytes(), tt.in[0:len(out)]; !same(in, d) {
t.Errorf("%s/%d: CTRReader\nhave %x\nwant %x", test, len(out), d, in)
}
}
if t.Failed() {
break
}
}
}

4
src/pkg/fmt/print.go
View File

@ -120,7 +120,7 @@ func (p *pp) add(c int) {
if c < utf8.RuneSelf {
p.buf.WriteByte(byte(c))
} else {
w := utf8.EncodeRune(c, p.runeBuf[0:])
w := utf8.EncodeRune(p.runeBuf[0:], c)
p.buf.Write(p.runeBuf[0:w])
}
}
@ -300,7 +300,7 @@ func (p *pp) fmtC(c int64) {
if int64(rune) != c {
rune = utf8.RuneError
}
w := utf8.EncodeRune(rune, p.runeBuf[0:utf8.UTFMax])
w := utf8.EncodeRune(p.runeBuf[0:utf8.UTFMax], rune)
p.fmt.pad(p.runeBuf[0:w])
}

2
src/pkg/html/escape.go
View File

@ -32,7 +32,7 @@ func unescapeEntity(b []byte, dst, src int) (dst1, src1 int) {
}
x := entity[string(s[1:i])]
if x != 0 {
return dst + utf8.EncodeRune(x, b[dst:]), src + i
return dst + utf8.EncodeRune(b[dst:], x), src + i
}
break
}

6
src/pkg/json/decode.go
View File

@ -831,13 +831,13 @@ func unquote(s []byte) (t string, ok bool) {
if dec := utf16.DecodeRune(rune, rune1); dec != unicode.ReplacementChar {
// A valid pair; consume.
r += 6
w += utf8.EncodeRune(dec, b[w:])
w += utf8.EncodeRune(b[w:], dec)
break
}
// Invalid surrogate; fall back to replacement rune.
rune = unicode.ReplacementChar
}
w += utf8.EncodeRune(rune, b[w:])
w += utf8.EncodeRune(b[w:], rune)
}
// Quote, control characters are invalid.
@ -854,7 +854,7 @@ func unquote(s []byte) (t string, ok bool) {
default:
rune, size := utf8.DecodeRune(s[r:])
r += size
w += utf8.EncodeRune(rune, b[w:])
w += utf8.EncodeRune(b[w:], rune)
}
}
return string(b[0:w]), true

2
src/pkg/regexp/regexp.go
View File

@ -674,7 +674,7 @@ Loop:
case _BOT, _EOT, _ALT:
break Loop
}
n := utf8.EncodeRune(inst.(*_Char).char, utf)
n := utf8.EncodeRune(utf, inst.(*_Char).char)
b = bytes.Add(b, utf[0:n])
i = inst.next().index()
}

2
src/pkg/strings/strings.go
View File

@ -317,7 +317,7 @@ func Map(mapping func(rune int) int, s string) string {
copy(nb, b[0:nbytes])
b = nb
}
nbytes += utf8.EncodeRune(rune, b[nbytes:maxbytes])
nbytes += utf8.EncodeRune(b[nbytes:maxbytes], rune)
}
}
return string(b[0:nbytes])

2
src/pkg/utf8/utf8.go
View File

@ -293,7 +293,7 @@ func RuneLen(rune int) int {
// EncodeRune writes into p (which must be large enough) the UTF-8 encoding of the rune.
// It returns the number of bytes written.
func EncodeRune(rune int, p []byte) int {
func EncodeRune(p []byte, rune int) int {
// Negative values are erroneous. Making it unsigned addresses the problem.
r := uint(rune)

10
src/pkg/utf8/utf8_test.go
View File

@ -80,7 +80,7 @@ func TestEncodeRune(t *testing.T) {
m := utf8map[i]
b := []byte(m.str)
var buf [10]byte
n := EncodeRune(m.rune, buf[0:])
n := EncodeRune(buf[0:], m.rune)
b1 := buf[0:n]
if !bytes.Equal(b, b1) {
t.Errorf("EncodeRune(%#04x) = %q want %q", m.rune, b1, b)
@ -242,9 +242,9 @@ func testSequence(t *testing.T, s string) {
// Check that negative runes encode as U+FFFD.
func TestNegativeRune(t *testing.T) {
errorbuf := make([]byte, UTFMax)
errorbuf = errorbuf[0:EncodeRune(RuneError, errorbuf)]
errorbuf = errorbuf[0:EncodeRune(errorbuf, RuneError)]
buf := make([]byte, UTFMax)
buf = buf[0:EncodeRune(-1, buf)]
buf = buf[0:EncodeRune(buf, -1)]
if !bytes.Equal(buf, errorbuf) {
t.Errorf("incorrect encoding [% x] for -1; expected [% x]", buf, errorbuf)
}
@ -289,14 +289,14 @@ func BenchmarkRuneCountTenJapaneseChars(b *testing.B) {
func BenchmarkEncodeASCIIRune(b *testing.B) {
buf := make([]byte, UTFMax)
for i := 0; i < b.N; i++ {
EncodeRune('a', buf)
EncodeRune(buf, 'a')
}
}
func BenchmarkEncodeJapaneseRune(b *testing.B) {
buf := make([]byte, UTFMax)
for i := 0; i < b.N; i++ {
EncodeRune('本', buf)
EncodeRune(buf, '本')
}
}