func (hr HResult) Error() string {
buf := make([]uint16, 300)
n, err := syscall.FormatMessage(syscall.FORMAT_MESSAGE_FROM_SYSTEM|syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY|syscall.FORMAT_MESSAGE_IGNORE_INSERTS,
0, uint32(hr), 0, buf, nil)
if err != nil {
return fmt.Sprintf("COM error %08x", uint32(hr))
}
return strings.TrimSpace(string(utf16.Decode(buf[:n])))
}
func (hr hresult) Error() string {
i := uint32(hr)
if 1 < i {
flags := uint32(syscall.FORMAT_MESSAGE_FROM_SYSTEM | syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY | syscall.FORMAT_MESSAGE_IGNORE_INSERTS)
b := make([]uint16, 300)
if _, err := syscall.FormatMessage(flags, 0, i, 0, b, nil); err == nil {
return strings.TrimSpace(syscall.UTF16ToString(b))
}
}
return fmt.Sprintf("0x%08x", i)
}
func errstr(errno int) string {
// ask windows for the remaining errors
var flags uint32 = syscall.FORMAT_MESSAGE_FROM_SYSTEM | syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY | syscall.FORMAT_MESSAGE_IGNORE_INSERTS
b := make([]uint16, 300)
n, err := syscall.FormatMessage(flags, 0, uint32(errno), 0, b, nil)
if err != nil {
return fmt.Sprintf("error %d (FormatMessage failed with: %v)", errno, err)
}
// trim terminating \r and \n
for ; n > 0 && (b[n-1] == '\n' || b[n-1] == '\r'); n-- {
}
return string(utf16.Decode(b[:n]))
}
func (hr HResult) String() string {
var name string
switch hr {
case S_OK:
name = "S_OK"
case S_FALSE:
name = "S_FALSE"
case E_NOTIMPL:
name = "E_NOTIMPL"
case E_NOINTERFACE:
name = "E_NOINTERFACE"
case E_POINTER:
name = "E_POINTER"
case CO_E_NOTINITIALIZED:
name = "CO_E_NOTINITIALIZED"
default:
name = fmt.Sprintf("0x%08X", uint32(hr))
}
var flags uint32 = syscall.FORMAT_MESSAGE_FROM_SYSTEM | syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY | syscall.FORMAT_MESSAGE_IGNORE_INSERTS
buf := make([]uint16, 320)
n, err := syscall.FormatMessage(flags, 0, uint32(hr), 0, buf, nil)
if n > 0 && err == nil {
// trim trailing newline
for n > 0 && (buf[n-1] == '\n' || buf[n-1] == '\r') {
n--
}
msg := string(utf16.Decode(buf[:n]))
return fmt.Sprintf("%s: %s", name, msg)
}
return name
}