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// +build windows
package gap
import (
"path/filepath"
"sync"
"syscall"
"unsafe"
)
// These are KNOWNFOLDERID constants that are passed to GetKnownFolderPath
var (
initOnce sync.Once
initError error
getKnownFolderPath uintptr
coTaskMemFree uintptr
rfidLocalAppData = syscall.GUID{
0xf1b32785,
0x6fba,
0x4fcf,
[8]byte{0x9d, 0x55, 0x7b, 0x8e, 0x7f, 0x15, 0x70, 0x91},
}
rfidRoamingAppData = syscall.GUID{
0x3eb685db,
0x65f9,
0x4cf6,
[8]byte{0xa0, 0x3a, 0xe3, 0xef, 0x65, 0x72, 0x9f, 0x3d},
}
rfidProgramData = syscall.GUID{
0x62ab5d82,
0xfdc1,
0x4dc3,
[8]byte{0xa9, 0xdd, 0x07, 0x0d, 0x1d, 0x49, 0x5d, 0x97},
}
)
// appendPaths appends the app-name and further variadic parts to a path
func (s *Scope) appendPaths(path string, parts ...string) string {
paths := []string{path}
paths = append(paths, parts...)
return filepath.Join(paths...)
}
// dataDir returns the full path to the data directory.
func (s *Scope) dataDir() (string, error) {
var rfid syscall.GUID
switch s.Type {
case System:
rfid = rfidProgramData
case User:
rfid = rfidLocalAppData
case CustomHome:
return s.CustomHome, nil
default:
return "", ErrInvalidScope
}
path, err := getFolderPath(rfid)
if err != nil {
return "", ErrRetrievingPath
}
if path, err = filepath.Abs(path); err != nil {
return "", ErrRetrievingPath
}
return filepath.Join(path, s.Vendor, s.App), nil
}
// dataDirs returns a priority-sorted slice of data dirs.
func (s *Scope) dataDirs() ([]string, error) {
p, err := s.dataDir()
if err != nil {
return nil, err
}
return []string{p}, nil
}
// configDir returns the full path to the config dir.
func (s *Scope) configDir() (string, error) {
p, err := s.dataDir()
if err != nil {
return p, err
}
return filepath.Join(p, "Config"), nil
}
// configDirs returns a priority-sorted slice of config dirs.
func (s *Scope) configDirs() ([]string, error) {
p, err := s.configDir()
if err != nil {
return nil, err
}
return []string{p}, nil
}
// cacheDir returns the full path to the cache directory.
func (s *Scope) cacheDir() (string, error) {
p, err := s.dataDir()
if err != nil {
return p, err
}
return filepath.Join(p, "Cache"), nil
}
// logDir returns the full path to the log dir.
func (s *Scope) logDir() (string, error) {
p, err := s.dataDir()
if err != nil {
return p, err
}
return filepath.Join(p, "Logs"), nil
}
func getFolderPath(rfid syscall.GUID) (string, error) {
initOnce.Do(initDLL)
if initError != nil {
return "", initError
}
var res uintptr
ret, _, callErr := syscall.Syscall6(
uintptr(getKnownFolderPath),
4,
uintptr(unsafe.Pointer(&rfid)),
0,
0,
uintptr(unsafe.Pointer(&res)),
0,
0,
)
if callErr != 0 && ret != 0 {
return "", callErr
}
defer syscall.Syscall(uintptr(coTaskMemFree), 1, res, 0, 0)
return ucs2PtrToString(res), nil
}
func ucs2PtrToString(p uintptr) string {
ptr := (*[4096]uint16)(unsafe.Pointer(p))
return syscall.UTF16ToString((*ptr)[:])
}
func initDLL() {
shell32, err := syscall.LoadLibrary("shell32.dll")
if err != nil {
initError = err
return
}
getKnownFolderPath, err = syscall.GetProcAddress(shell32, "SHGetKnownFolderPath")
if err != nil {
initError = err
return
}
ole32, err := syscall.LoadLibrary("Ole32.dll")
if err != nil {
initError = err
return
}
coTaskMemFree, err = syscall.GetProcAddress(ole32, "CoTaskMemFree")
if err != nil {
initError = err
return
}
}
|
