blob: 395fb7baf9017ceff1c5cdf9112bf7ea9512ab0d (
plain)
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
|
package diff
import (
"bufio"
"io"
)
// readLine is a helper that mimics the functionality of calling bufio.Scanner.Scan() and
// bufio.Scanner.Bytes(), but without the token size limitation. It will read and return
// the next line in the Reader with the trailing newline stripped. It will return an
// io.EOF error when there is nothing left to read (at the start of the function call). It
// will return any other errors it receives from the underlying call to ReadBytes.
func readLine(r *bufio.Reader) ([]byte, error) {
line_, err := r.ReadBytes('\n')
if err == io.EOF {
if len(line_) == 0 {
return nil, io.EOF
}
// ReadBytes returned io.EOF, because it didn't find another newline, but there is
// still the remainder of the file to return as a line.
line := line_
return line, nil
} else if err != nil {
return nil, err
}
line := line_[0 : len(line_)-1]
return dropCR(line), nil
}
// dropCR drops a terminal \r from the data.
func dropCR(data []byte) []byte {
if len(data) > 0 && data[len(data)-1] == '\r' {
return data[0 : len(data)-1]
}
return data
}
|
