Subversion Repositories openrisc

/* 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);

}