Esempio n. 1
0
func convertCFStringToString(cfStr C.CFStringRef) string {
	cstrPtr := C.CFStringGetCStringPtr(cfStr, C.kCFStringEncodingUTF8)
	if cstrPtr != nil {
		return C.GoString(cstrPtr)
	}
	// quick path doesn't work, so copy the bytes out to a buffer
	length := C.CFStringGetLength(cfStr)
	if length == 0 {
		// short-cut for empty strings
		return ""
	}
	cfRange := C.CFRange{0, length}
	enc := C.CFStringEncoding(C.kCFStringEncodingUTF8)
	// first find the buffer size necessary
	var usedBufLen C.CFIndex
	if C.CFStringGetBytes(cfStr, cfRange, enc, 0, C.false, nil, 0, &usedBufLen) > 0 {
		bytes := make([]byte, usedBufLen)
		buffer := (*C.UInt8)(unsafe.Pointer(&bytes[0]))
		if C.CFStringGetBytes(cfStr, cfRange, enc, 0, C.false, buffer, usedBufLen, nil) > 0 {
			// bytes is now filled up
			// convert it to a string
			header := (*reflect.SliceHeader)(unsafe.Pointer(&bytes))
			strHeader := &reflect.StringHeader{
				Data: header.Data,
				Len:  header.Len,
			}
			return *(*string)(unsafe.Pointer(strHeader))
		}
	}

	// we failed to convert, for some reason. Too bad there's no nil string
	return ""
}
Esempio n. 2
0
func (ke keychainError) Error() string {
	errorMessageCFString := C.SecCopyErrorMessageString(C.OSStatus(ke), nil)
	defer C.CFRelease(C.CFTypeRef(errorMessageCFString))

	errorMessageCString := C.CFStringGetCStringPtr(errorMessageCFString, C.kCFStringEncodingASCII)

	if errorMessageCString != nil {
		return C.GoString(errorMessageCString)
	}

	return fmt.Sprintf("keychainError with unknown error code %d", C.OSStatus(ke))
}
Esempio n. 3
0
func (object Object) getStringProperty(key C.CFStringRef) (propValue string) {
	var result C.CFStringRef

	osStatus := C.MIDIObjectGetStringProperty(object.object, key, &result)

	if osStatus != C.noErr {
		return
	}

	defer C.CFRelease((C.CFTypeRef)(result))

	value := C.CFStringGetCStringPtr(result, C.kCFStringEncodingMacRoman)
	propValue = C.GoString(value)

	return
}
Esempio n. 4
0
// CFStringToString converts a CFStringRef to a string.
func CFStringToString(s C.CFStringRef) string {
	p := C.CFStringGetCStringPtr(s, C.kCFStringEncodingUTF8)
	if p != nil {
		return C.GoString(p)
	}
	length := C.CFStringGetLength(s)
	if length == 0 {
		return ""
	}
	maxBufLen := C.CFStringGetMaximumSizeForEncoding(length, C.kCFStringEncodingUTF8)
	if maxBufLen == 0 {
		return ""
	}
	buf := make([]byte, maxBufLen)
	var usedBufLen C.CFIndex
	_ = C.CFStringGetBytes(s, C.CFRange{0, length}, C.kCFStringEncodingUTF8, C.UInt8(0), C.false, (*C.UInt8)(&buf[0]), maxBufLen, &usedBufLen)
	return string(buf[:usedBufLen])
}
Esempio n. 5
0
// Converts a CGStringRef object to a Go string.
func CFStringToGoString(s C.CFStringRef) string {
	ptr := C.CFStringGetCStringPtr(s, C.kCFStringEncodingUTF8)

	if ptr != nil {
		return C.GoString(ptr)
	}

	n := C.CFStringGetLength(s)
	b := make([]byte, int(4*n))
	C.CFStringGetBytes(
		s,
		C.CFRangeMake(0, n),
		C.kCFStringEncodingUTF8,
		'?',
		0,
		(*C.UInt8)(unsafe.Pointer(&b[0])),
		C.CFIndex(len(b)),
		&n,
	)

	return string(b[:n])
}