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// +build windows
package windowsbase
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var (
shell32 = windows.NewLazyDLL("Shell32.dll")
ole32 = windows.NewLazyDLL("Ole32.dll")
procSHGetKnownFolderPath = shell32.NewProc("SHGetKnownFolderPath")
procCoTaskMemFree = ole32.NewProc("CoTaskMemFree")
)
func knownFolderDir(fid *FolderID) (string, error) {
var path uintptr
err := shGetKnownFolderPath(fid, 0, 0, &path)
if err != nil {
return "", err
}
defer coTaskMemFree(path)
dir := syscall.UTF16ToString((*[1 << 16]uint16)(unsafe.Pointer(path))[:])
return dir, nil
}
func shGetKnownFolderPath(fid *FolderID, dwFlags uint32, hToken syscall.Handle, pszPath *uintptr) (retval error) {
r0, _, _ := procSHGetKnownFolderPath.Call(uintptr(unsafe.Pointer(fid)), uintptr(dwFlags), uintptr(hToken), uintptr(unsafe.Pointer(pszPath)), 0, 0)
if r0 != 0 {
return syscall.Errno(r0)
}
return nil
}
func coTaskMemFree(pv uintptr) {
procCoTaskMemFree.Call(uintptr(pv), 0, 0)
}
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