40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* go-eface-compare.c -- compare two empty values.
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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 "runtime.h"
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#include "go-type.h"
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#include "interface.h"
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/* Compare two interface values. Return 0 for equal, not zero for not
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equal (return value is like strcmp). */
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intgo
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__go_empty_interface_compare (struct __go_empty_interface left,
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struct __go_empty_interface right)
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{
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const struct __go_type_descriptor *left_descriptor;
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left_descriptor = left.__type_descriptor;
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if (((uintptr_t) left_descriptor & reflectFlags) != 0
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|| ((uintptr_t) right.__type_descriptor & reflectFlags) != 0)
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runtime_panicstring ("invalid interface value");
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if (left_descriptor == NULL && right.__type_descriptor == NULL)
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return 0;
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if (left_descriptor == NULL || right.__type_descriptor == NULL)
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return 1;
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if (!__go_type_descriptors_equal (left_descriptor,
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right.__type_descriptor))
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return 1;
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if (__go_is_pointer_type (left_descriptor))
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return left.__object == right.__object ? 0 : 1;
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if (!left_descriptor->__equalfn (left.__object, right.__object,
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left_descriptor->__size))
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return 1;
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return 0;
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}
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