blob: 1d367753a1e4bcd3d6a306f09fbed5f15310ef28 [file] [log] [blame]
/* go-interface-compare.c -- compare two interface values.
Copyright 2009 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. */
#include <stddef.h>
#include "runtime.h"
#include "go-type.h"
#include "interface.h"
/* Compare two interface values. Return 0 for equal, not zero for not
equal (return value is like strcmp). */
__go_interface_compare (struct __go_interface left,
struct __go_interface right)
const struct __go_type_descriptor *left_descriptor;
if (left.__methods == NULL && right.__methods == NULL)
return 0;
if (left.__methods == NULL || right.__methods == NULL)
return 1;
left_descriptor = left.__methods[0];
if (!__go_type_descriptors_equal (left_descriptor, right.__methods[0]))
return 1;
if (__go_is_pointer_type (left_descriptor))
return left.__object == right.__object ? 0 : 1;
if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object,
right.__object, left_descriptor->__size))
return 1;
return 0;