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Removed bytes.Add and bytes.AddByte; we now have 'append'.

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Changed all uses of bytes.Add (aside from those testing bytes.Add) to append(a, b...).
Also ran "gofmt -s" and made use of copy([]byte, string) in the fasta benchmark.

R=golang-dev, r, r2
CC=golang-dev
https://golang.org/cl/3302042
This commit is contained in:
Kyle Consalus 2010-12-01 11:59:13 -08:00 committed by Rob Pike
parent 1f90447e31
commit 009aebdba8
10 changed files with 31 additions and 118 deletions
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2
doc/effective_go.html
View File

@ -794,7 +794,7 @@ func Contents(filename string) (string, os.Error) {
buf := make([]byte, 100)
for {
n, err := f.Read(buf[0:])
result = bytes.Add(result, buf[0:n])
result = append(result, buf[0:n]...) // append is discussed later.
if err != nil {
if err == os.EOF {
break

42
src/pkg/bytes/bytes.go
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@ -552,48 +552,6 @@ func TrimSpace(s []byte) []byte {
return TrimFunc(s, unicode.IsSpace)
}
// How big to make a byte array when growing.
// Heuristic: Scale by 50% to give n log n time.
func resize(n int) int {
if n < 16 {
n = 16
}
return n + n/2
}
// Add appends the contents of t to the end of s and returns the result.
// If s has enough capacity, it is extended in place; otherwise a
// new array is allocated and returned.
func Add(s, t []byte) []byte { // TODO
lens := len(s)
lent := len(t)
if lens+lent <= cap(s) {
s = s[0 : lens+lent]
} else {
news := make([]byte, lens+lent, resize(lens+lent))
copy(news, s)
s = news
}
copy(s[lens:lens+lent], t)
return s
}
// AddByte appends byte t to the end of s and returns the result.
// If s has enough capacity, it is extended in place; otherwise a
// new array is allocated and returned.
func AddByte(s []byte, t byte) []byte { // TODO
lens := len(s)
if lens+1 <= cap(s) {
s = s[0 : lens+1]
} else {
news := make([]byte, lens+1, resize(lens+1))
copy(news, s)
s = news
}
s[lens] = t
return s
}
// Runes returns a slice of runes (Unicode code points) equivalent to s.
func Runes(s []byte) []int {
t := make([]int, utf8.RuneCount(s))

39
src/pkg/bytes/bytes_test.go
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@ -573,45 +573,6 @@ func TestToLower(t *testing.T) { runStringTests(t, ToLower, "ToLower", lowerTest
func TestTrimSpace(t *testing.T) { runStringTests(t, TrimSpace, "TrimSpace", trimSpaceTests) }
type AddTest struct {
s, t string
cap int
}
var addtests = []AddTest{
{"", "", 0},
{"a", "", 1},
{"a", "b", 1},
{"abc", "def", 100},
}
func TestAdd(t *testing.T) {
for _, test := range addtests {
b := make([]byte, len(test.s), test.cap)
copy(b, test.s)
b = Add(b, []byte(test.t))
if string(b) != test.s+test.t {
t.Errorf("Add(%q,%q) = %q", test.s, test.t, string(b))
}
}
}
func TestAddByte(t *testing.T) {
const N = 2e5
b := make([]byte, 0)
for i := 0; i < N; i++ {
b = AddByte(b, byte(i))
}
if len(b) != N {
t.Errorf("AddByte: too small; expected %d got %d", N, len(b))
}
for i, c := range b {
if c != byte(i) {
t.Fatalf("AddByte: b[%d] should be %d is %d", i, c, byte(i))
}
}
}
type RepeatTest struct {
in, out string
count int

2
src/pkg/crypto/tls/conn.go
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@ -560,7 +560,7 @@ func (c *Conn) readHandshake() (interface{}, os.Error) {
// The handshake message unmarshallers
// expect to be able to keep references to data,
// so pass in a fresh copy that won't be overwritten.
data = bytes.Add(nil, data)
data = append([]byte(nil), data...)
if !m.unmarshal(data) {
c.sendAlert(alertUnexpectedMessage)

2
src/pkg/json/scanner_test.go
View File

@ -147,7 +147,7 @@ func TestNextValueBig(t *testing.T) {
t.Errorf("invalid rest: %d", len(rest))
}
item, rest, err = nextValue(bytes.Add(jsonBig, []byte("HELLO WORLD")), &scan)
item, rest, err = nextValue(append(jsonBig, []byte("HELLO WORLD")...), &scan)
if err != nil {
t.Fatalf("nextValue extra: ", err)
}

3
src/pkg/json/stream.go
View File

@ -5,7 +5,6 @@
package json
import (
"bytes"
"io"
"os"
)
@ -177,7 +176,7 @@ func (m *RawMessage) UnmarshalJSON(data []byte) os.Error {
if m == nil {
return os.NewError("json.RawMessage: UnmarshalJSON on nil pointer")
}
*m = bytes.Add((*m)[0:0], data)
*m = append((*m)[0:0], data...)
return nil
}

6
src/pkg/net/textproto/reader.go
View File

@ -51,8 +51,6 @@ func (r *Reader) ReadLineBytes() ([]byte, os.Error) {
return line[0:n], err
}
var space = []byte{' '}
// ReadContinuedLine reads a possibly continued line from r,
// eliding the final trailing ASCII white space.
// Lines after the first are considered continuations if they
@ -132,8 +130,8 @@ func (r *Reader) ReadContinuedLineBytes() ([]byte, os.Error) {
var cont []byte
cont, err = r.ReadLineBytes()
cont = trim(cont)
line = bytes.Add(line, space)
line = bytes.Add(line, cont)
line = append(line, ' ')
line = append(line, cont...)
if err != nil {
break
}

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

@ -675,7 +675,7 @@ Loop:
break Loop
}
n := utf8.EncodeRune(utf, inst.(*_Char).char)
b = bytes.Add(b, utf[0:n])
b = append(b, utf[0:n]...)
i = inst.next().index()
}
// point prefixStart instruction to first non-CHAR after prefix

4
src/pkg/xml/read.go
View File

@ -389,12 +389,12 @@ Loop:
case CharData:
if saveData != nil {
data = bytes.Add(data, t)
data = append(data, t...)
}
case Comment:
if saveComment != nil {
comment = bytes.Add(comment, t)
comment = append(comment, t...)
}
}
}

47
test/bench/fasta.go
View File

@ -37,7 +37,6 @@ POSSIBILITY OF SUCH DAMAGE.
package main
import (
"bytes"
"flag"
"os"
)
@ -49,7 +48,7 @@ var n = flag.Int("n", 1000, "length of result")
const Line = 60
func Repeat(alu []byte, n int) {
buf := bytes.Add(alu, alu)
buf := append(alu, alu...)
off := 0
for n > 0 {
m := n
@ -138,28 +137,28 @@ func main() {
flag.Parse()
iub := []Acid{
Acid{prob: 0.27, sym: 'a'},
Acid{prob: 0.12, sym: 'c'},
Acid{prob: 0.12, sym: 'g'},
Acid{prob: 0.27, sym: 't'},
Acid{prob: 0.02, sym: 'B'},
Acid{prob: 0.02, sym: 'D'},
Acid{prob: 0.02, sym: 'H'},
Acid{prob: 0.02, sym: 'K'},
Acid{prob: 0.02, sym: 'M'},
Acid{prob: 0.02, sym: 'N'},
Acid{prob: 0.02, sym: 'R'},
Acid{prob: 0.02, sym: 'S'},
Acid{prob: 0.02, sym: 'V'},
Acid{prob: 0.02, sym: 'W'},
Acid{prob: 0.02, sym: 'Y'},
{prob: 0.27, sym: 'a'},
{prob: 0.12, sym: 'c'},
{prob: 0.12, sym: 'g'},
{prob: 0.27, sym: 't'},
{prob: 0.02, sym: 'B'},
{prob: 0.02, sym: 'D'},
{prob: 0.02, sym: 'H'},
{prob: 0.02, sym: 'K'},
{prob: 0.02, sym: 'M'},
{prob: 0.02, sym: 'N'},
{prob: 0.02, sym: 'R'},
{prob: 0.02, sym: 'S'},
{prob: 0.02, sym: 'V'},
{prob: 0.02, sym: 'W'},
{prob: 0.02, sym: 'Y'},
}
homosapiens := []Acid{
Acid{prob: 0.3029549426680, sym: 'a'},
Acid{prob: 0.1979883004921, sym: 'c'},
Acid{prob: 0.1975473066391, sym: 'g'},
Acid{prob: 0.3015094502008, sym: 't'},
{prob: 0.3029549426680, sym: 'a'},
{prob: 0.1979883004921, sym: 'c'},
{prob: 0.1975473066391, sym: 'g'},
{prob: 0.3015094502008, sym: 't'},
}
alu := []byte(
@ -192,9 +191,7 @@ func (b *buffer) Flush() {
func (b *buffer) WriteString(s string) {
p := b.NextWrite(len(s))
for i := 0; i < len(s); i++ {
p[i] = s[i]
}
copy(p, s)
}
func (b *buffer) NextWrite(n int) []byte {
@ -204,6 +201,6 @@ func (b *buffer) NextWrite(n int) []byte {
p = *b
}
out := p[len(p) : len(p)+n]
*b = p[0 : len(p)+n]
*b = p[:len(p)+n]
return out
}