-
Notifications
You must be signed in to change notification settings - Fork 6
/
impl.go
108 lines (103 loc) · 2.02 KB
/
impl.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
package uncommenter
import (
"bufio"
"io"
)
func newUncommenter(reader io.Reader, commentTypes uint64) io.Reader {
if commentTypes == 0 {
return reader
}
if bReader, ok := reader.(bufferedReader); ok {
return &uncommenter{
commentTypes: commentTypes,
reader: bReader,
}
}
return &uncommenter{
commentTypes: commentTypes,
reader: bufio.NewReader(reader),
}
}
func readUntilNewline(reader bufferedReader) error {
for {
b, err := reader.ReadByte()
if err != nil {
return err
}
if b == '\n' {
return nil
}
}
}
func (u *uncommenter) read(p []byte) (int, error) {
if len(p) < 1 {
return 0, u.error
}
if len(p) < 2 {
return u.reader.Read(p)
}
for {
if n, err := u.readOnce(p); n > 0 || err != nil {
return n, err
}
}
}
func (u *uncommenter) readOnce(p []byte) (int, error) {
if u.error != nil {
return 0, u.error
}
if u.waitingForNewline {
for count := range p {
b, err := u.reader.ReadByte()
if err != nil {
u.error = err
return count, err
}
p[count] = b
if b == '\n' {
u.waitingForNewline = false
return count + 1, nil
}
u.waitingForNewline = true
}
return len(p), nil
}
// Start of file/line: read until first non-whitespace.
var nRead int
for nRead < len(p) {
p[nRead], u.error = u.reader.ReadByte()
if u.error != nil {
return nRead, u.error
}
nRead++
if p[nRead-1] == ' ' {
continue
}
if p[nRead-1] == '\t' {
continue
}
break
}
if p[nRead-1] == '#' && u.commentTypes&CommentTypeHash != 0 {
u.error = readUntilNewline(u.reader)
return 0, u.error
}
if p[nRead-1] == '/' && u.commentTypes&CommentTypeSlashSlash != 0 &&
nRead < len(p) {
p[nRead], u.error = u.reader.ReadByte()
if u.error != nil {
return nRead - 1, u.error
}
nRead++
if p[nRead-1] == '/' {
u.error = readUntilNewline(u.reader)
return 0, u.error
}
}
if p[nRead-1] == '!' && u.commentTypes&CommentTypeBang != 0 {
u.error = readUntilNewline(u.reader)
return 0, u.error
}
u.waitingForNewline = true
return nRead, nil
}