36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* go-eface-val-compare.c -- compare an empty interface with a value.
|
|
|
|
Copyright 2010 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 "runtime.h"
|
|
#include "go-type.h"
|
|
#include "interface.h"
|
|
|
|
/* Compare an empty interface with a value. Return 0 for equal, not
|
|
zero for not equal (return value is like strcmp). */
|
|
|
|
int
|
|
__go_empty_interface_value_compare (
|
|
struct __go_empty_interface left,
|
|
const struct __go_type_descriptor *right_descriptor,
|
|
const void *val)
|
|
{
|
|
const struct __go_type_descriptor *left_descriptor;
|
|
|
|
left_descriptor = left.__type_descriptor;
|
|
if (((uintptr_t) left_descriptor & reflectFlags) != 0)
|
|
runtime_panicstring ("invalid interface value");
|
|
if (left_descriptor == NULL)
|
|
return 1;
|
|
if (!__go_type_descriptors_equal (left_descriptor, right_descriptor))
|
|
return 1;
|
|
if (__go_is_pointer_type (left_descriptor))
|
|
return left.__object == val ? 0 : 1;
|
|
if (!left_descriptor->__equalfn (left.__object, val,
|
|
left_descriptor->__size))
|
|
return 1;
|
|
return 0;
|
|
}
|