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/* go-type-eface.c -- hash and equality empty interface functions.
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 "runtime.h"
#include "interface.h"
#include "go-type.h"
/* A hash function for an empty interface. */
uintptr_t
__go_type_hash_empty_interface (const void *vval,
uintptr_t key_size __attribute__ ((unused)))
{
const struct __go_empty_interface *val;
const struct __go_type_descriptor *descriptor;
uintptr_t size;
val = (const struct __go_empty_interface *) vval;
descriptor = val->__type_descriptor;
if (descriptor == NULL)
return 0;
size = descriptor->__size;
if (__go_is_pointer_type (descriptor))
return descriptor->__hashfn (&val->__object, size);
else
return descriptor->__hashfn (val->__object, size);
}
/* An equality function for an empty interface. */
_Bool
__go_type_equal_empty_interface (const void *vv1, const void *vv2,
uintptr_t key_size __attribute__ ((unused)))
{
const struct __go_empty_interface *v1;
const struct __go_empty_interface *v2;
const struct __go_type_descriptor* v1_descriptor;
const struct __go_type_descriptor* v2_descriptor;
v1 = (const struct __go_empty_interface *) vv1;
v2 = (const struct __go_empty_interface *) vv2;
v1_descriptor = v1->__type_descriptor;
v2_descriptor = v2->__type_descriptor;
if (((uintptr_t) v1_descriptor & reflectFlags) != 0
|| ((uintptr_t) v2_descriptor & reflectFlags) != 0)
runtime_panicstring ("invalid interface value");
if (v1_descriptor == NULL || v2_descriptor == NULL)
return v1_descriptor == v2_descriptor;
if (!__go_type_descriptors_equal (v1_descriptor, v2_descriptor))
return 0;
if (__go_is_pointer_type (v1_descriptor))
return v1->__object == v2->__object;
else
return v1_descriptor->__equalfn (v1->__object, v2->__object,
v1_descriptor->__size);
}
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