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go
golang
Commits
33f3ed77
Commit
33f3ed77
authored
Jan 16, 2009
by
Rob Pike
Browse files
Options
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Plain Diff
casify fixup for bufio
R=rsc DELTA=88 (0 added, 12 deleted, 76 changed) OCL=22884 CL=22890
parent
3decb42e
Show whitespace changes
Inline
Side-by-side
Showing
2 changed files
with
72 additions
and
84 deletions
+72
-84
bufio.go
src/lib/bufio.go
+13
-17
bufio_test.go
src/lib/bufio_test.go
+59
-67
No files found.
src/lib/bufio.go
View file @
33f3ed77
...
...
@@ -18,7 +18,7 @@ import (
// - buffered output
const
(
D
efaultBufSize
=
4096
d
efaultBufSize
=
4096
)
export
var
(
...
...
@@ -30,7 +30,7 @@ export var (
ShortWrite
=
os
.
NewError
(
"short write"
);
)
func
C
opySlice
(
dst
[]
byte
,
src
[]
byte
)
{
func
c
opySlice
(
dst
[]
byte
,
src
[]
byte
)
{
for
i
:=
0
;
i
<
len
(
dst
);
i
++
{
dst
[
i
]
=
src
[
i
]
}
...
...
@@ -57,9 +57,7 @@ export func NewBufReadSize(rd io.Read, size int) (b *BufRead, err *os.Error) {
}
export
func
NewBufRead
(
rd
io
.
Read
)
(
b
*
BufRead
,
err
*
os
.
Error
)
{
// 6g BUG return NewBufReadSize(rd, DefaultBufSize)
r
,
e
:=
NewBufReadSize
(
rd
,
DefaultBufSize
);
return
r
,
e
return
NewBufReadSize
(
rd
,
defaultBufSize
);
}
// Read a new chunk into the buffer.
...
...
@@ -70,7 +68,7 @@ func (b *BufRead) Fill() *os.Error {
// Slide existing data to beginning.
if
b
.
w
>
b
.
r
{
C
opySlice
(
b
.
buf
[
0
:
b
.
w
-
b
.
r
],
b
.
buf
[
b
.
r
:
b
.
w
]);
c
opySlice
(
b
.
buf
[
0
:
b
.
w
-
b
.
r
],
b
.
buf
[
b
.
r
:
b
.
w
]);
b
.
w
-=
b
.
r
;
}
else
{
b
.
w
=
0
...
...
@@ -107,7 +105,7 @@ func (b *BufRead) Read(p []byte) (nn int, err *os.Error) {
if
n
>
b
.
w
-
b
.
r
{
n
=
b
.
w
-
b
.
r
}
C
opySlice
(
p
[
0
:
n
],
b
.
buf
[
b
.
r
:
b
.
r
+
n
]);
c
opySlice
(
p
[
0
:
n
],
b
.
buf
[
b
.
r
:
b
.
r
+
n
]);
p
=
p
[
n
:
len
(
p
)];
b
.
r
+=
n
;
nn
+=
n
...
...
@@ -170,7 +168,7 @@ func (b *BufRead) ReadRune() (rune int, size int, err *os.Error) {
// Helper function: look for byte c in array p,
// returning its index or -1.
func
F
indByte
(
p
[]
byte
,
c
byte
)
int
{
func
f
indByte
(
p
[]
byte
,
c
byte
)
int
{
for
i
:=
0
;
i
<
len
(
p
);
i
++
{
if
p
[
i
]
==
c
{
return
i
...
...
@@ -197,7 +195,7 @@ func (b *BufRead) ReadLineSlice(delim byte) (line []byte, err *os.Error) {
}
// Look in buffer.
if
i
:=
F
indByte
(
b
.
buf
[
b
.
r
:
b
.
w
],
delim
);
i
>=
0
{
if
i
:=
f
indByte
(
b
.
buf
[
b
.
r
:
b
.
w
],
delim
);
i
>=
0
{
line1
:=
b
.
buf
[
b
.
r
:
b
.
r
+
i
+
1
];
b
.
r
+=
i
+
1
;
return
line1
,
nil
...
...
@@ -217,7 +215,7 @@ func (b *BufRead) ReadLineSlice(delim byte) (line []byte, err *os.Error) {
}
// Search new part of buffer
if
i
:=
F
indByte
(
b
.
buf
[
n
:
b
.
w
],
delim
);
i
>=
0
{
if
i
:=
f
indByte
(
b
.
buf
[
n
:
b
.
w
],
delim
);
i
>=
0
{
line
:=
b
.
buf
[
0
:
n
+
i
+
1
];
b
.
r
=
n
+
i
+
1
;
return
line
,
nil
...
...
@@ -304,10 +302,10 @@ func (b *BufRead) ReadLineBytes(delim byte) (line []byte, err *os.Error) {
buf
:=
make
([]
byte
,
n
);
n
=
0
;
for
i
:=
0
;
i
<
nfull
;
i
++
{
C
opySlice
(
buf
[
n
:
n
+
len
(
full
[
i
])],
full
[
i
]);
c
opySlice
(
buf
[
n
:
n
+
len
(
full
[
i
])],
full
[
i
]);
n
+=
len
(
full
[
i
])
}
C
opySlice
(
buf
[
n
:
n
+
len
(
frag
)],
frag
);
c
opySlice
(
buf
[
n
:
n
+
len
(
frag
)],
frag
);
return
buf
,
err
}
...
...
@@ -346,9 +344,7 @@ export func NewBufWriteSize(wr io.Write, size int) (b *BufWrite, err *os.Error)
}
export
func
NewBufWrite
(
wr
io
.
Write
)
(
b
*
BufWrite
,
err
*
os
.
Error
)
{
// 6g BUG return NewBufWriteSize(wr, DefaultBufSize)
r
,
e
:=
NewBufWriteSize
(
wr
,
DefaultBufSize
);
return
r
,
e
return
NewBufWriteSize
(
wr
,
defaultBufSize
);
}
// Flush the output buffer.
...
...
@@ -365,7 +361,7 @@ func (b *BufWrite) Flush() *os.Error {
}
if
e
!=
nil
{
if
n
<
b
.
n
{
C
opySlice
(
b
.
buf
[
0
:
b
.
n
-
n
],
b
.
buf
[
n
:
b
.
n
])
c
opySlice
(
b
.
buf
[
0
:
b
.
n
-
n
],
b
.
buf
[
n
:
b
.
n
])
}
b
.
n
-=
n
;
b
.
err
=
e
;
...
...
@@ -400,7 +396,7 @@ func (b *BufWrite) Write(p []byte) (nn int, err *os.Error) {
if
n
>
len
(
p
)
{
n
=
len
(
p
)
}
C
opySlice
(
b
.
buf
[
b
.
n
:
b
.
n
+
n
],
p
[
0
:
n
]);
c
opySlice
(
b
.
buf
[
b
.
n
:
b
.
n
+
n
],
p
[
0
:
n
]);
b
.
n
+=
n
;
nn
+=
n
;
p
=
p
[
n
:
len
(
p
)]
...
...
src/lib/bufio_test.go
View file @
33f3ed77
...
...
@@ -13,55 +13,47 @@ import (
"testing"
;
)
func
StringToBytes
(
s
string
)
[]
byte
{
b
:=
make
([]
byte
,
len
(
s
));
for
i
:=
0
;
i
<
len
(
s
);
i
++
{
b
[
i
]
=
s
[
i
]
}
return
b
}
// Should be in language!
func
C
opy
(
p
[]
byte
,
q
[]
byte
)
{
func
c
opy
(
p
[]
byte
,
q
[]
byte
)
{
for
i
:=
0
;
i
<
len
(
p
);
i
++
{
p
[
i
]
=
q
[
i
]
}
}
// Reads from p.
type
B
yteReader
struct
{
type
b
yteReader
struct
{
p
[]
byte
}
func
N
ewByteReader
(
p
[]
byte
)
io
.
Read
{
b
:=
new
(
B
yteReader
);
func
n
ewByteReader
(
p
[]
byte
)
io
.
Read
{
b
:=
new
(
b
yteReader
);
b
.
p
=
p
;
return
b
}
func
(
b
*
B
yteReader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
func
(
b
*
b
yteReader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
n
:=
len
(
p
);
if
n
>
len
(
b
.
p
)
{
n
=
len
(
b
.
p
)
}
C
opy
(
p
[
0
:
n
],
b
.
p
[
0
:
n
]);
c
opy
(
p
[
0
:
n
],
b
.
p
[
0
:
n
]);
b
.
p
=
b
.
p
[
n
:
len
(
b
.
p
)];
return
n
,
nil
}
// Reads from p but only returns half of what you asked for.
type
H
alfByteReader
struct
{
type
h
alfByteReader
struct
{
p
[]
byte
}
func
N
ewHalfByteReader
(
p
[]
byte
)
io
.
Read
{
b
:=
new
(
H
alfByteReader
);
func
n
ewHalfByteReader
(
p
[]
byte
)
io
.
Read
{
b
:=
new
(
h
alfByteReader
);
b
.
p
=
p
;
return
b
}
func
(
b
*
H
alfByteReader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
func
(
b
*
h
alfByteReader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
n
:=
len
(
p
)
/
2
;
if
n
==
0
&&
len
(
p
)
>
0
{
n
=
1
...
...
@@ -69,23 +61,23 @@ func (b *HalfByteReader) Read(p []byte) (int, *os.Error) {
if
n
>
len
(
b
.
p
)
{
n
=
len
(
b
.
p
)
}
C
opy
(
p
[
0
:
n
],
b
.
p
[
0
:
n
]);
c
opy
(
p
[
0
:
n
],
b
.
p
[
0
:
n
]);
b
.
p
=
b
.
p
[
n
:
len
(
b
.
p
)];
return
n
,
nil
}
// Reads from a reader and rot13s the result.
type
R
ot13Reader
struct
{
type
r
ot13Reader
struct
{
r
io
.
Read
}
func
NewRot13Reader
(
r
io
.
Read
)
*
R
ot13Reader
{
r13
:=
new
(
R
ot13Reader
);
func
newRot13Reader
(
r
io
.
Read
)
*
r
ot13Reader
{
r13
:=
new
(
r
ot13Reader
);
r13
.
r
=
r
;
return
r13
}
func
(
r13
*
R
ot13Reader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
func
(
r13
*
r
ot13Reader
)
Read
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
n
,
e
:=
r13
.
r
.
Read
(
p
);
if
e
!=
nil
{
return
n
,
e
...
...
@@ -102,18 +94,18 @@ func (r13 *Rot13Reader) Read(p []byte) (int, *os.Error) {
return
n
,
nil
}
type
Readm
aker
struct
{
type
readM
aker
struct
{
name
string
;
fn
*
([]
byte
)
io
.
Read
;
}
var
read
makers
=
[]
Readm
aker
{
Readmaker
{
"full"
,
func
(
p
[]
byte
)
io
.
Read
{
return
N
ewByteReader
(
p
)
}
},
Readmaker
{
"half"
,
func
(
p
[]
byte
)
io
.
Read
{
return
N
ewHalfByteReader
(
p
)
}
},
var
read
Makers
=
[]
readM
aker
{
readMaker
{
"full"
,
func
(
p
[]
byte
)
io
.
Read
{
return
n
ewByteReader
(
p
)
}
},
readMaker
{
"half"
,
func
(
p
[]
byte
)
io
.
Read
{
return
n
ewHalfByteReader
(
p
)
}
},
}
// Call ReadLineString (which ends up calling everything else)
// to accumulate the text of a file.
func
R
eadLines
(
b
*
BufRead
)
string
{
func
r
eadLines
(
b
*
BufRead
)
string
{
s
:=
""
;
for
{
s1
,
e
:=
b
.
ReadLineString
(
'\n'
,
true
);
...
...
@@ -129,7 +121,7 @@ func ReadLines(b *BufRead) string {
}
// Call ReadByte to accumulate the text of a file
func
R
eadBytes
(
buf
*
BufRead
)
string
{
func
r
eadBytes
(
buf
*
BufRead
)
string
{
var
b
[
1000
]
byte
;
nb
:=
0
;
for
{
...
...
@@ -148,7 +140,7 @@ func ReadBytes(buf *BufRead) string {
}
// Call Read to accumulate the text of a file
func
R
eads
(
buf
*
BufRead
,
m
int
)
string
{
func
r
eads
(
buf
*
BufRead
,
m
int
)
string
{
var
b
[
1000
]
byte
;
nb
:=
0
;
for
{
...
...
@@ -161,19 +153,19 @@ func Reads(buf *BufRead, m int) string {
return
string
(
b
[
0
:
nb
])
}
type
Bufr
eader
struct
{
type
bufR
eader
struct
{
name
string
;
fn
*
(
*
BufRead
)
string
;
}
var
bufreaders
=
[]
Bufr
eader
{
Bufreader
{
"1"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
1
)
}
},
Bufreader
{
"2"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
2
)
}
},
Bufreader
{
"3"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
3
)
}
},
Bufreader
{
"4"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
4
)
}
},
Bufreader
{
"5"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
5
)
}
},
Bufreader
{
"7"
,
func
(
b
*
BufRead
)
string
{
return
R
eads
(
b
,
7
)
}
},
Bufreader
{
"bytes"
,
&
R
eadBytes
},
Bufreader
{
"lines"
,
&
R
eadLines
},
var
bufreaders
=
[]
bufR
eader
{
bufReader
{
"1"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
1
)
}
},
bufReader
{
"2"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
2
)
}
},
bufReader
{
"3"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
3
)
}
},
bufReader
{
"4"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
4
)
}
},
bufReader
{
"5"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
5
)
}
},
bufReader
{
"7"
,
func
(
b
*
BufRead
)
string
{
return
r
eads
(
b
,
7
)
}
},
bufReader
{
"bytes"
,
&
r
eadBytes
},
bufReader
{
"lines"
,
&
r
eadLines
},
}
var
bufsizes
=
[]
int
{
...
...
@@ -182,13 +174,13 @@ var bufsizes = []int {
}
export
func
TestBufReadSimple
(
t
*
testing
.
T
)
{
b
,
e
:=
NewBufRead
(
NewByteReader
(
StringTo
Bytes
(
"hello world"
)));
if
s
:=
R
eadBytes
(
b
);
s
!=
"hello world"
{
b
,
e
:=
NewBufRead
(
newByteReader
(
io
.
String
Bytes
(
"hello world"
)));
if
s
:=
r
eadBytes
(
b
);
s
!=
"hello world"
{
t
.
Errorf
(
"simple hello world test failed: got %q"
,
s
);
}
b
,
e
=
NewBufRead
(
NewRot13Reader
(
NewByteReader
(
StringTo
Bytes
(
"hello world"
))));
if
s
:=
R
eadBytes
(
b
);
s
!=
"uryyb jbeyq"
{
b
,
e
=
NewBufRead
(
newRot13Reader
(
newByteReader
(
io
.
String
Bytes
(
"hello world"
))));
if
s
:=
r
eadBytes
(
b
);
s
!=
"uryyb jbeyq"
{
t
.
Error
(
"rot13 hello world test failed: got %q"
,
s
);
}
}
...
...
@@ -206,11 +198,11 @@ export func TestBufRead(t *testing.T) {
for
h
:=
0
;
h
<
len
(
texts
);
h
++
{
text
:=
texts
[
h
];
textbytes
:=
StringTo
Bytes
(
text
);
for
i
:=
0
;
i
<
len
(
read
m
akers
);
i
++
{
textbytes
:=
io
.
String
Bytes
(
text
);
for
i
:=
0
;
i
<
len
(
read
M
akers
);
i
++
{
for
j
:=
0
;
j
<
len
(
bufreaders
);
j
++
{
for
k
:=
0
;
k
<
len
(
bufsizes
);
k
++
{
readmaker
:=
read
m
akers
[
i
];
readmaker
:=
read
M
akers
[
i
];
bufreader
:=
bufreaders
[
j
];
bufsize
:=
bufsizes
[
k
];
read
:=
readmaker
.
fn
(
textbytes
);
...
...
@@ -226,72 +218,72 @@ export func TestBufRead(t *testing.T) {
}
}
type
W
riteBuffer
interface
{
type
w
riteBuffer
interface
{
Write
(
p
[]
byte
)
(
int
,
*
os
.
Error
);
GetBytes
()
[]
byte
}
// Accumulates bytes into a byte array.
type
B
yteWriter
struct
{
type
b
yteWriter
struct
{
p
[]
byte
;
n
int
}
func
NewByteWriter
()
W
riteBuffer
{
return
new
(
B
yteWriter
)
func
newByteWriter
()
w
riteBuffer
{
return
new
(
b
yteWriter
)
}
func
(
w
*
B
yteWriter
)
Write
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
func
(
w
*
b
yteWriter
)
Write
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
if
w
.
p
==
nil
{
w
.
p
=
make
([]
byte
,
len
(
p
)
+
100
)
}
else
if
w
.
n
+
len
(
p
)
>=
len
(
w
.
p
)
{
newp
:=
make
([]
byte
,
len
(
w
.
p
)
*
2
+
len
(
p
));
C
opy
(
newp
[
0
:
w
.
n
],
w
.
p
[
0
:
w
.
n
]);
c
opy
(
newp
[
0
:
w
.
n
],
w
.
p
[
0
:
w
.
n
]);
w
.
p
=
newp
}
C
opy
(
w
.
p
[
w
.
n
:
w
.
n
+
len
(
p
)],
p
);
c
opy
(
w
.
p
[
w
.
n
:
w
.
n
+
len
(
p
)],
p
);
w
.
n
+=
len
(
p
);
return
len
(
p
),
nil
}
func
(
w
*
B
yteWriter
)
GetBytes
()
[]
byte
{
func
(
w
*
b
yteWriter
)
GetBytes
()
[]
byte
{
return
w
.
p
[
0
:
w
.
n
]
}
// Accumulates bytes written into a byte array
// but Write only takes half of what you give it.
// TODO: Could toss this -- Write() is not supposed to do that.
type
H
alfByteWriter
struct
{
bw
W
riteBuffer
type
h
alfByteWriter
struct
{
bw
w
riteBuffer
}
func
NewHalfByteWriter
()
W
riteBuffer
{
w
:=
new
(
H
alfByteWriter
);
w
.
bw
=
N
ewByteWriter
();
func
newHalfByteWriter
()
w
riteBuffer
{
w
:=
new
(
h
alfByteWriter
);
w
.
bw
=
n
ewByteWriter
();
return
w
}
func
(
w
*
H
alfByteWriter
)
Write
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
func
(
w
*
h
alfByteWriter
)
Write
(
p
[]
byte
)
(
int
,
*
os
.
Error
)
{
n
:=
(
len
(
p
)
+
1
)
/
2
;
// BUG return w.bw.Write(p[0:n])
r
,
e
:=
w
.
bw
.
Write
(
p
[
0
:
n
]);
return
r
,
e
}
func
(
w
*
H
alfByteWriter
)
GetBytes
()
[]
byte
{
func
(
w
*
h
alfByteWriter
)
GetBytes
()
[]
byte
{
return
w
.
bw
.
GetBytes
()
}
type
Writem
aker
struct
{
type
writeM
aker
struct
{
name
string
;
fn
*
()
W
riteBuffer
;
fn
*
()
w
riteBuffer
;
}
export
func
TestBufWrite
(
t
*
testing
.
T
)
{
var
data
[
8192
]
byte
;
var
writers
=
[]
Writem
aker
{
Writemaker
{
"full"
,
&
N
ewByteWriter
},
Writemaker
{
"half"
,
&
N
ewHalfByteWriter
},
var
writers
=
[]
writeM
aker
{
writeMaker
{
"full"
,
&
n
ewByteWriter
},
writeMaker
{
"half"
,
&
n
ewHalfByteWriter
},
};
for
i
:=
0
;
i
<
len
(
data
);
i
++
{
...
...
Write
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