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bytes.Buffer: remove dead code, complete documentation

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R=r, dave, r
CC=golang-dev
https://golang.org/cl/5533086
This commit is contained in:
Robert Griesemer 2012-01-21 21:31:21 -08:00
parent b0d2713b77
commit e17afa4d0c
1 changed files with 8 additions and 9 deletions
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17
src/pkg/bytes/buffer.go
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@ -103,20 +103,16 @@ func (b *Buffer) grow(n int) int {
func (b *Buffer) Write(p []byte) (n int, err error) { func (b *Buffer) Write(p []byte) (n int, err error) {
b.lastRead = opInvalid b.lastRead = opInvalid
m := b.grow(len(p)) m := b.grow(len(p))
if m < 0 {
return 0, ErrTooLarge
}
return copy(b.buf[m:], p), nil return copy(b.buf[m:], p), nil
} }
// WriteString appends the contents of s to the buffer. The return // WriteString appends the contents of s to the buffer. The return
// value n is the length of s; err is always nil. // value n is the length of s; err is always nil.
// If the buffer becomes too large, WriteString will panic with
// ErrTooLarge.
func (b *Buffer) WriteString(s string) (n int, err error) { func (b *Buffer) WriteString(s string) (n int, err error) {
b.lastRead = opInvalid b.lastRead = opInvalid
m := b.grow(len(s)) m := b.grow(len(s))
if m < 0 {
return 0, ErrTooLarge
}
return copy(b.buf[m:], s), nil return copy(b.buf[m:], s), nil
} }
@ -130,6 +126,8 @@ const MinRead = 512
// The return value n is the number of bytes read. // The return value n is the number of bytes read.
// Any error except io.EOF encountered during the read // Any error except io.EOF encountered during the read
// is also returned. // is also returned.
// If the buffer becomes too large, ReadFrom will panic with
// ErrTooLarge.
func (b *Buffer) ReadFrom(r io.Reader) (n int64, err error) { func (b *Buffer) ReadFrom(r io.Reader) (n int64, err error) {
b.lastRead = opInvalid b.lastRead = opInvalid
// If buffer is empty, reset to recover space. // If buffer is empty, reset to recover space.
@ -198,12 +196,11 @@ func (b *Buffer) WriteTo(w io.Writer) (n int64, err error) {
// WriteByte appends the byte c to the buffer. // WriteByte appends the byte c to the buffer.
// The returned error is always nil, but is included // The returned error is always nil, but is included
// to match bufio.Writer's WriteByte. // to match bufio.Writer's WriteByte.
// If the buffer becomes too large, WriteByte will panic with
// ErrTooLarge.
func (b *Buffer) WriteByte(c byte) error { func (b *Buffer) WriteByte(c byte) error {
b.lastRead = opInvalid b.lastRead = opInvalid
m := b.grow(1) m := b.grow(1)
if m < 0 {
return ErrTooLarge
}
b.buf[m] = c b.buf[m] = c
return nil return nil
} }
@ -212,6 +209,8 @@ func (b *Buffer) WriteByte(c byte) error {
// code point r to the buffer, returning its length and // code point r to the buffer, returning its length and
// an error, which is always nil but is included // an error, which is always nil but is included
// to match bufio.Writer's WriteRune. // to match bufio.Writer's WriteRune.
// If the buffer becomes too large, WriteRune will panic with
// ErrTooLarge.
func (b *Buffer) WriteRune(r rune) (n int, err error) { func (b *Buffer) WriteRune(r rune) (n int, err error) {
if r < utf8.RuneSelf { if r < utf8.RuneSelf {
b.WriteByte(byte(r)) b.WriteByte(byte(r))