1 /* go-eface-val-compare.c -- compare an empty interface with a value. 2 3 Copyright 2010 The Go Authors. All rights reserved. 4 Use of this source code is governed by a BSD-style 5 license that can be found in the LICENSE file. */ 6 7 #include "runtime.h" 8 #include "go-type.h" 9 #include "interface.h" 10 11 /* Compare an empty interface with a value. Return 0 for equal, not 12 zero for not equal (return value is like strcmp). */ 13 14 intgo __go_empty_interface_value_compare(struct __go_empty_interface left,const struct __go_type_descriptor * right_descriptor,const void * val)15__go_empty_interface_value_compare ( 16 struct __go_empty_interface left, 17 const struct __go_type_descriptor *right_descriptor, 18 const void *val) 19 { 20 const struct __go_type_descriptor *left_descriptor; 21 22 left_descriptor = left.__type_descriptor; 23 if (left_descriptor == NULL) 24 return 1; 25 if (!__go_type_descriptors_equal (left_descriptor, right_descriptor)) 26 return 1; 27 if (__go_is_pointer_type (left_descriptor)) 28 return left.__object == val ? 0 : 1; 29 if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object, val, 30 left_descriptor->__size)) 31 return 1; 32 return 0; 33 } 34