/* 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 (((uintptr_t) right.__type_descriptor & reflectFlags) != 0) runtime_panicstring ("invalid interface value"); 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 (!left_descriptor->__equalfn (left.__object, right.__object, left_descriptor->__size)) return 1; return 0; }