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fileinfo.go
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fileinfo.go
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package rwvfs
import (
"encoding/json"
"os"
"path"
"time"
)
func newDirInfo(name string) os.FileInfo {
return fileInfo{name: path.Base(name), dir: true}
}
func newSymlinkInfo(name string) os.FileInfo {
return fileInfo{name: path.Base(name), symlink: true}
}
func newFileInfo(name, contents string) os.FileInfo {
return fileInfo{name: path.Base(name), size: int64(len(contents))}
}
// fileInfo implements os.FileInfo.
type fileInfo struct {
name string
size int64
dir bool
modTime time.Time
symlink bool
}
func (fi fileInfo) IsDir() bool { return fi.dir }
func (fi fileInfo) ModTime() time.Time { return fi.modTime }
func (fi fileInfo) Mode() os.FileMode {
if fi.IsDir() {
return 0755 | os.ModeDir
}
if fi.symlink {
return 0755 | os.ModeSymlink
}
return 0444
}
func (fi fileInfo) Name() string { return path.Base(fi.name) }
func (fi fileInfo) Size() int64 { return fi.size }
func (fi fileInfo) Sys() interface{} { return nil }
type fileInfoJSON struct{ os.FileInfo }
func (fi fileInfoJSON) MarshalJSON() ([]byte, error) {
return json.Marshal(map[string]interface{}{
"name": fi.Name(),
"size": fi.Size(),
"dir": fi.Mode().IsDir(),
"modTime": fi.ModTime(),
"symlink": fi.Mode()&os.ModeSymlink > 0,
})
}
func (fi *fileInfoJSON) UnmarshalJSON(b []byte) error {
var fi2 struct {
Name string `json:"name"`
Size int64 `json:"size"`
Dir bool `json:"dir"`
ModTime time.Time `json:"modTime"`
Symlink bool `json:"symlink"`
}
if err := json.Unmarshal(b, &fi2); err != nil {
return err
}
*fi = fileInfoJSON{
fileInfo{
name: fi2.Name,
size: fi2.Size,
dir: fi2.Dir,
modTime: fi2.ModTime,
symlink: fi2.Symlink,
},
}
return nil
}