36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* go-eface-val-compare.c -- compare an empty interface with a value.
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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 "go-panic.h"
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#include "go-type.h"
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#include "interface.h"
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/* Compare an empty interface with a value. Return 0 for equal, not
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zero for not equal (return value is like strcmp). */
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int
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__go_empty_interface_value_compare (
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struct __go_empty_interface left,
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const struct __go_type_descriptor *right_descriptor,
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const void *val)
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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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__go_panic_msg ("invalid interface value");
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if (left_descriptor == NULL)
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return 1;
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if (!__go_type_descriptors_equal (left_descriptor, right_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 == val ? 0 : 1;
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if (!left_descriptor->__equalfn (left.__object, val,
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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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