36 lines
1010 B
Plaintext
36 lines
1010 B
Plaintext
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package reflect
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#include "go-type.h"
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#include "interface.h"
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#define nil NULL
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typedef unsigned char byte;
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typedef struct __go_interface Iface;
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typedef struct __go_empty_interface Eface;
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func setiface(typ *byte, x *byte, ret *byte) {
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struct __go_interface_type *t;
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const struct __go_type_descriptor* xt;
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/* FIXME: We should check __type_descriptor to verify that
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this is really a type descriptor. */
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t = (struct __go_interface_type *)typ;
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if(t->__methods.__count == 0) {
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// already an empty interface
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*(Eface*)ret = *(Eface*)x;
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return;
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}
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xt = ((Eface*)x)->__type_descriptor;
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if(xt == nil) {
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// can assign nil to any interface
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((Iface*)ret)->__methods = nil;
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((Iface*)ret)->__object = nil;
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return;
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}
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((Iface*)ret)->__methods = __go_convert_interface(&t->__common, xt);
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((Iface*)ret)->__object = ((Eface*)x)->__object;
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}
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