40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/* go-typedesc-equal.c -- return whether two type descriptors are equal.
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Copyright 2009 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 "runtime.h"
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#include "go-string.h"
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#include "go-type.h"
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/* Compare type descriptors for equality. This is necessary because
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types may have different descriptors in different shared libraries.
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Also, unnamed types may have multiple type descriptors even in a
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single shared library. */
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_Bool
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__go_type_descriptors_equal (const struct __go_type_descriptor *td1,
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const struct __go_type_descriptor *td2)
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{
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if (td1 == td2)
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return 1;
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/* In a type switch we can get a NULL descriptor. */
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if (td1 == NULL || td2 == NULL)
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return 0;
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if (td1->__code != td2->__code || td1->__hash != td2->__hash)
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return 0;
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if (td1->__uncommon != NULL && td1->__uncommon->__name != NULL)
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{
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if (td2->__uncommon == NULL || td2->__uncommon->__name == NULL)
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return 0;
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return (__go_ptr_strings_equal (td1->__uncommon->__name,
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td2->__uncommon->__name)
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&& __go_ptr_strings_equal (td1->__uncommon->__pkg_path,
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td2->__uncommon->__pkg_path));
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}
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if (td2->__uncommon != NULL && td2->__uncommon->__name != NULL)
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return 0;
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return __go_ptr_strings_equal (td1->__reflection, td2->__reflection);
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}
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