60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* go-type-eface.c -- hash and equality empty interface functions.
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Copyright 2010 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include "interface.h"
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#include "go-panic.h"
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#include "go-type.h"
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/* A hash function for an empty interface. */
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size_t
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__go_type_hash_empty_interface (const void *vval,
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size_t key_size __attribute__ ((unused)))
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{
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const struct __go_empty_interface *val;
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const struct __go_type_descriptor *descriptor;
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size_t size;
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val = (const struct __go_empty_interface *) vval;
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descriptor = val->__type_descriptor;
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if (descriptor == NULL)
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return 0;
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size = descriptor->__size;
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if (__go_is_pointer_type (descriptor))
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return descriptor->__hashfn (&val->__object, size);
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else
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return descriptor->__hashfn (val->__object, size);
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}
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/* An equality function for an empty interface. */
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_Bool
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__go_type_equal_empty_interface (const void *vv1, const void *vv2,
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size_t key_size __attribute__ ((unused)))
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{
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const struct __go_empty_interface *v1;
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const struct __go_empty_interface *v2;
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const struct __go_type_descriptor* v1_descriptor;
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const struct __go_type_descriptor* v2_descriptor;
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v1 = (const struct __go_empty_interface *) vv1;
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v2 = (const struct __go_empty_interface *) vv2;
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v1_descriptor = v1->__type_descriptor;
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v2_descriptor = v2->__type_descriptor;
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if (((uintptr_t) v1_descriptor & reflectFlags) != 0
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|| ((uintptr_t) v2_descriptor & reflectFlags) != 0)
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__go_panic_msg ("invalid interface value");
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if (v1_descriptor == NULL || v2_descriptor == NULL)
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return v1_descriptor == v2_descriptor;
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if (!__go_type_descriptors_equal (v1_descriptor, v2_descriptor))
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return 0;
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if (__go_is_pointer_type (v1_descriptor))
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return v1->__object == v2->__object;
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else
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return v1_descriptor->__equalfn (v1->__object, v2->__object,
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v1_descriptor->__size);
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}
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