| /* go-interface-eface-compare.c -- compare non-empty and empty interface. |
| |
| Copyright 2011 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 a non-empty interface value with an empty interface value. |
| Return 0 for equal, not zero for not equal (return value is like |
| strcmp). */ |
| |
| intgo |
| __go_interface_empty_compare (struct __go_interface left, |
| struct __go_empty_interface right) |
| { |
| const struct __go_type_descriptor *left_descriptor; |
| |
| if (left.__methods == NULL && right.__type_descriptor == NULL) |
| return 0; |
| if (left.__methods == NULL || right.__type_descriptor == NULL) |
| return 1; |
| left_descriptor = left.__methods[0]; |
| if (!__go_type_descriptors_equal (left_descriptor, right.__type_descriptor)) |
| return 1; |
| if (__go_is_pointer_type (left_descriptor)) |
| return left.__object == right.__object ? 0 : 1; |
| if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object, |
| right.__object, left_descriptor->__size)) |
| return 1; |
| return 0; |
| } |
