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/* go-typedesc-equal.c -- return whether two type descriptors are equal.

   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 "go-string.h"

#include "go-type.h"

/* Compare type descriptors for equality.  This is necessary because

   types may have different descriptors in different shared libraries.

   Also, unnamed types may have multiple type descriptors even in a

   single shared library.  */

_Bool

__go_type_descriptors_equal (const struct __go_type_descriptor *td1,

                             const struct __go_type_descriptor *td2)

{

  if (td1 == td2)

    return 1;

  /* In a type switch we can get a NULL descriptor.  */

  if (td1 == NULL || td2 == NULL)

    return 0;

  if (td1->__code != td2->__code || td1->__hash != td2->__hash)

    return 0;

  if (td1->__uncommon != NULL && td1->__uncommon->__name != NULL)

    {

      if (td2->__uncommon == NULL || td2->__uncommon->__name == NULL)

        return 0;

      return (__go_ptr_strings_equal (td1->__uncommon->__name,

                                      td2->__uncommon->__name)

              && __go_ptr_strings_equal (td1->__uncommon->__pkg_path,

                                         td2->__uncommon->__pkg_path));

    }

  if (td2->__uncommon != NULL && td2->__uncommon->__name != NULL)

    return 0;

  return __go_ptr_strings_equal (td1->__reflection, td2->__reflection);

}