// GetString is a wrapper around g_value_get_string(). GetString()
// returns a non-nil error if g_value_get_string() returned a NULL
// pointer to distinguish between returning a NULL pointer and returning
// an empty string.
func (v *Value) GetString() (string, error) {
c := C.g_value_get_string(v.native())
if c == nil {
return "", errNilPtr
}
return C.GoString((*C.char)(c)), nil
}
func (v *Value) Get() interface{} {
t := Type(v.g().g_type)
switch t {
case TYPE_INVALID:
return nil
case TYPE_STRING:
return C.GoString((*C.char)(C.g_value_get_string(v.g())))
case TYPE_GO_INT:
return int(C.g_value_get_long(v.g()))
case TYPE_GO_UINT:
return uint(C.g_value_get_ulong(v.g()))
case TYPE_CHAR:
return int8(C.g_value_get_schar(v.g()))
case TYPE_UCHAR:
return uint8(C.g_value_get_uchar(v.g()))
case TYPE_GO_INT32:
return int32(C.g_value_get_int(v.g()))
case TYPE_GO_UINT32:
return uint32(C.g_value_get_uint(v.g()))
case TYPE_INT64:
return int64(C.g_value_get_int64(v.g()))
case TYPE_UINT64:
return uint64(C.g_value_get_uint64(v.g()))
case TYPE_BOOLEAN:
return (C.g_value_get_boolean(v.g()) != C.gboolean(0))
case TYPE_FLOAT:
return float32(C.g_value_get_float(v.g()))
case TYPE_DOUBLE:
return float64(C.g_value_get_double(v.g()))
case TYPE_POINTER:
return Pointer(C.g_value_get_pointer(v.g()))
case TYPE_GTYPE:
return Type(C.g_value_get_gtype(v.g()))
}
if t.IsA(TYPE_OBJECT) {
o := new(Object)
o.SetPtr(Pointer(C.g_value_get_object(v.g())))
return o
}
if C.g_value_fits_pointer(v.g()) != 0 {
return Pointer(C.g_value_peek_pointer(v.g()))
}
// Value of unknown type is returned as is
return v
}
func fromGValue(v *C.GValue) (ret interface{}) {
valueType := C.gvalue_get_type(v)
fundamentalType := C.gtype_get_fundamental(valueType)
switch fundamentalType {
case C.G_TYPE_OBJECT:
ret = unsafe.Pointer(C.g_value_get_object(v))
case C.G_TYPE_STRING:
ret = fromGStr(C.g_value_get_string(v))
case C.G_TYPE_UINT:
ret = int(C.g_value_get_uint(v))
case C.G_TYPE_BOXED:
ret = unsafe.Pointer(C.g_value_get_boxed(v))
case C.G_TYPE_BOOLEAN:
ret = C.g_value_get_boolean(v) == C.gboolean(1)
default:
fmt.Printf("from type %s %T\n", fromGStr(C.g_type_name(fundamentalType)), v)
panic("FIXME") //TODO
}
return
}
// GoValue() converts a Value to comparable Go type. GoValue()
// returns a non-nil error if the conversion was unsuccessful. The
// returned interface{} must be type asserted as the actual Go
// representation of the Value.
//
// This function is a wrapper around the many g_value_get_*()
// functions, depending on the type of the Value.
func (v *Value) GoValue() (interface{}, error) {
switch v.GetType() {
case TYPE_INVALID:
return nil, errors.New("Invalid type")
case TYPE_NONE:
return nil, nil
case TYPE_BOOLEAN:
c := C.g_value_get_boolean(v.Native())
return gobool(c), nil
case TYPE_CHAR:
c := C.g_value_get_schar(v.Native())
return int8(c), nil
case TYPE_UCHAR:
c := C.g_value_get_uchar(v.Native())
return uint8(c), nil
case TYPE_INT64:
c := C.g_value_get_int64(v.Native())
return int64(c), nil
case TYPE_INT:
c := C.g_value_get_int(v.Native())
return int(c), nil
case TYPE_UINT64:
c := C.g_value_get_uint64(v.Native())
return uint64(c), nil
case TYPE_UINT:
c := C.g_value_get_uint(v.Native())
return uint(c), nil
case TYPE_FLOAT:
c := C.g_value_get_float(v.Native())
return float32(c), nil
case TYPE_DOUBLE:
c := C.g_value_get_double(v.Native())
return float64(c), nil
case TYPE_STRING:
c := C.g_value_get_string(v.Native())
return C.GoString((*C.char)(c)), nil
default:
return nil, errors.New("Type conversion not supported")
}
}
func (v *GValue) GetString() string {
return C.GoString(C.to_charptr(C.g_value_get_string(&v.Value)))
}
func marshalString(p uintptr) (interface{}, error) {
c := C.g_value_get_string((*C.GValue)(unsafe.Pointer(p)))
return C.GoString((*C.char)(c)), nil
}
// GoValue() converts a Value to comparable Go type. GoValue()
// returns a non-nil error if the conversion was unsuccessful. The
// returned interface{} must be type asserted as the actual Go
// representation of the Value.
//
// This function is a wrapper around the many g_value_get_*()
// functions, depending on the type of the Value.
func (v *Value) GoValue() (interface{}, error) {
_, fundamental, err := v.Type()
if err != nil {
return nil, err
}
// TODO: verify that all of these cases are indeed fundamental types
switch fundamental {
case TYPE_INVALID:
return nil, errors.New("invalid type")
case TYPE_NONE:
return nil, nil
case TYPE_INTERFACE:
return nil, errors.New("interface conversion not yet implemented")
case TYPE_CHAR:
c := C.g_value_get_schar(v.Native())
return int8(c), nil
case TYPE_UCHAR:
c := C.g_value_get_uchar(v.Native())
return uint8(c), nil
case TYPE_BOOLEAN:
c := C.g_value_get_boolean(v.Native())
return gobool(c), nil
// TODO: TYPE_INT should probably be a Go int32.
case TYPE_INT, TYPE_LONG, TYPE_ENUM:
c := C.g_value_get_int(v.Native())
return int(c), nil
case TYPE_INT64:
c := C.g_value_get_int64(v.Native())
return int64(c), nil
// TODO: TYPE_UINT should probably be a Go uint32.
case TYPE_UINT, TYPE_ULONG, TYPE_FLAGS:
c := C.g_value_get_uint(v.Native())
return uint(c), nil
case TYPE_UINT64:
c := C.g_value_get_uint64(v.Native())
return uint64(c), nil
case TYPE_FLOAT:
c := C.g_value_get_float(v.Native())
return float32(c), nil
case TYPE_DOUBLE:
c := C.g_value_get_double(v.Native())
return float64(c), nil
case TYPE_STRING:
c := C.g_value_get_string(v.Native())
return C.GoString((*C.char)(c)), nil
case TYPE_POINTER:
c := C.g_value_get_pointer(v.Native())
return unsafe.Pointer(c), nil
case TYPE_OBJECT:
c := C.g_value_get_object(v.Native())
// TODO: need to try and return an actual pointer to the correct object type
// this may require an additional cast()-like method for each module
return ObjectNew(unsafe.Pointer(c)), nil
case TYPE_VARIANT:
return nil, errors.New("variant conversion not yet implemented")
default:
return nil, errors.New("type conversion not supported")
}
}
func (v *GValue) GetString() string {
cstr := C.g_value_get_string(&v.Value)
defer C.free_string(C.to_charptr(cstr))
return C.GoString(C.to_charptr(cstr))
}
func (self GValue) GetPtr() unsafe.Pointer {
switch self.gtype {
case G_TYPE_STRING:
return unsafe.Pointer(C.g_value_get_string(self.value))
case G_TYPE_BOOLEAN:
b := C.g_value_get_boolean(self.value)
return unsafe.Pointer(&b)
case G_TYPE_CHAR:
c := C.g_value_get_char(self.value)
return unsafe.Pointer(&c)
case G_TYPE_INT:
i := C.g_value_get_int(self.value)
return unsafe.Pointer(&i)
case G_TYPE_LONG:
l := C.g_value_get_long(self.value)
return unsafe.Pointer(&l)
case G_TYPE_INT64:
i := C.g_value_get_int64(self.value)
return unsafe.Pointer(&i)
case G_TYPE_UCHAR:
c := C.g_value_get_uchar(self.value)
return unsafe.Pointer(&c)
case G_TYPE_UINT:
i := C.g_value_get_uint(self.value)
return unsafe.Pointer(&i)
case G_TYPE_ULONG:
l := C.g_value_get_ulong(self.value)
return unsafe.Pointer(&l)
case G_TYPE_UINT64:
i := C.g_value_get_uint64(self.value)
return unsafe.Pointer(&i)
case G_TYPE_FLOAT:
f := C.g_value_get_float(self.value)
return unsafe.Pointer(&f)
case G_TYPE_DOUBLE:
d := C.g_value_get_double(self.value)
return unsafe.Pointer(&d)
}
// Now things get tricky
// We know the type, but how is it stored?
// Is it pointer?
isIt := C.pointer_in_gvalue(self.value)
if GoBool(unsafe.Pointer(&isIt)) {
val := C.g_value_get_pointer(self.value)
return unsafe.Pointer(val)
}
// Is it object?
isIt = C.object_in_gvalue(self.value)
if GoBool(unsafe.Pointer(&isIt)) {
o := C.g_value_get_object(self.value)
return unsafe.Pointer(o)
}
//Hmmm....
ptr := C.g_value_peek_pointer(self.value)
if ptr != nil {
return unsafe.Pointer(ptr)
}
return nil
}
// g_value_get_string
func (this *Value) GetString() string {
return C.GoString((*C.char)(C.g_value_get_string(this.asC())))
}