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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package reflect
#include "go-type.h"
#include "interface.h"
#define nil NULL
typedef unsigned char byte;
typedef struct __go_interface Iface;
typedef struct __go_empty_interface Eface;
func setiface(typ *byte, x *byte, ret *byte) {
struct __go_interface_type *t;
const struct __go_type_descriptor* xt;
/* FIXME: We should check __type_descriptor to verify that
this is really a type descriptor. */
t = (struct __go_interface_type *)typ;
if(t->__methods.__count == 0) {
// already an empty interface
*(Eface*)ret = *(Eface*)x;
return;
}
xt = ((Eface*)x)->__type_descriptor;
if(xt == nil) {
// can assign nil to any interface
((Iface*)ret)->__methods = nil;
((Iface*)ret)->__object = nil;
return;
}
((Iface*)ret)->__methods = __go_convert_interface(&t->__common, xt);
((Iface*)ret)->__object = ((Eface*)x)->__object;
}
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