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Diffstat (limited to 'libgo/runtime/go-interface-val-compare.c')
-rw-r--r-- | libgo/runtime/go-interface-val-compare.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libgo/runtime/go-interface-val-compare.c b/libgo/runtime/go-interface-val-compare.c new file mode 100644 index 0000000000..15898924ac --- /dev/null +++ b/libgo/runtime/go-interface-val-compare.c @@ -0,0 +1,32 @@ +/* go-interface-val-compare.c -- compare an interface to a value. + + Copyright 2009 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 "go-type.h" +#include "interface.h" + +/* Compare two interface values. Return 0 for equal, not zero for not + equal (return value is like strcmp). */ + +int +__go_interface_value_compare ( + struct __go_interface left, + const struct __go_type_descriptor *right_descriptor, + const void *val) +{ + const struct __go_type_descriptor *left_descriptor; + + if (left.__methods == NULL) + return 1; + left_descriptor = left.__methods[0]; + 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; +} |