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/* go-eface-val-compare.c -- compare an empty interface with a value.
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. */
#include "go-panic.h"
#include "go-type.h"
#include "interface.h"
/* Compare an empty interface with a value. Return 0 for equal, not
zero for not equal (return value is like strcmp). */
int
__go_empty_interface_value_compare (
struct __go_empty_interface left,
const struct __go_type_descriptor *right_descriptor,
const void *val)
{
const struct __go_type_descriptor *left_descriptor;
left_descriptor = left.__type_descriptor;
if (((uintptr_t) left_descriptor & reflectFlags) != 0)
__go_panic_msg ("invalid interface value");
if (left_descriptor == NULL)
return 1;
if (!__go_type_descriptors_equal (left_descriptor, right_descriptor))
return 1;
if (__go_is_pointer_type (left_descriptor))
return left.__object == val ? 0 : 1;
if (!left_descriptor->__equalfn (left.__object, val,
left_descriptor->__size))
return 1;
return 0;
}
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