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
|
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package filepath
import (
"syscall"
)
func toShort(path string) (string, error) {
p, err := syscall.UTF16FromString(path)
if err != nil {
return "", err
}
b := p // GetShortPathName says we can reuse buffer
n := uint32(len(b))
for {
n, err = syscall.GetShortPathName(&p[0], &b[0], uint32(len(b)))
if err != nil {
return "", err
}
if n <= uint32(len(b)) {
return syscall.UTF16ToString(b[:n]), nil
}
b = make([]uint16, n)
}
}
func toLong(path string) (string, error) {
p, err := syscall.UTF16FromString(path)
if err != nil {
return "", err
}
b := p // GetLongPathName says we can reuse buffer
n := uint32(len(b))
for {
n, err = syscall.GetLongPathName(&p[0], &b[0], uint32(len(b)))
if err != nil {
return "", err
}
if n <= uint32(len(b)) {
return syscall.UTF16ToString(b[:n]), nil
}
b = make([]uint16, n)
}
}
func evalSymlinks(path string) (string, error) {
path, err := walkSymlinks(path)
if err != nil {
return "", err
}
p, err := toShort(path)
if err != nil {
return "", err
}
p, err = toLong(p)
if err != nil {
return "", err
}
// syscall.GetLongPathName does not change the case of the drive letter,
// but the result of EvalSymlinks must be unique, so we have
// EvalSymlinks(`c:\a`) == EvalSymlinks(`C:\a`).
// Make drive letter upper case.
if len(p) >= 2 && p[1] == ':' && 'a' <= p[0] && p[0] <= 'z' {
p = string(p[0]+'A'-'a') + p[1:]
}
return Clean(p), nil
}
|
