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Diffstat (limited to 'libgo/runtime/go-can-convert-interface.c')
-rw-r--r--libgo/runtime/go-can-convert-interface.c78
1 files changed, 0 insertions, 78 deletions
diff --git a/libgo/runtime/go-can-convert-interface.c b/libgo/runtime/go-can-convert-interface.c
deleted file mode 100644
index aac889d346..0000000000
--- a/libgo/runtime/go-can-convert-interface.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/* go-can-convert-interface.c -- can we convert to an interface?
-
- 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 "runtime.h"
-#include "go-assert.h"
-#include "go-string.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Return whether we can convert from the type in FROM_DESCRIPTOR to
- the interface in TO_DESCRIPTOR. This is used for type
- switches. */
-
-_Bool
-__go_can_convert_to_interface (
- const struct __go_type_descriptor *to_descriptor,
- const struct __go_type_descriptor *from_descriptor)
-{
- const struct __go_interface_type *to_interface;
- int to_method_count;
- const struct __go_interface_method *to_method;
- const struct __go_uncommon_type *from_uncommon;
- int from_method_count;
- const struct __go_method *from_method;
- int i;
-
- /* In a type switch FROM_DESCRIPTOR can be NULL. */
- if (from_descriptor == NULL)
- return 0;
-
- __go_assert ((to_descriptor->__code & GO_CODE_MASK) == GO_INTERFACE);
- to_interface = (const struct __go_interface_type *) to_descriptor;
- to_method_count = to_interface->__methods.__count;
- to_method = ((const struct __go_interface_method *)
- to_interface->__methods.__values);
-
- from_uncommon = from_descriptor->__uncommon;
- if (from_uncommon == NULL)
- {
- from_method_count = 0;
- from_method = NULL;
- }
- else
- {
- from_method_count = from_uncommon->__methods.__count;
- from_method = ((const struct __go_method *)
- from_uncommon->__methods.__values);
- }
-
- for (i = 0; i < to_method_count; ++i)
- {
- while (from_method_count > 0
- && (!__go_ptr_strings_equal (from_method->__name,
- to_method->__name)
- || !__go_ptr_strings_equal (from_method->__pkg_path,
- to_method->__pkg_path)))
- {
- ++from_method;
- --from_method_count;
- }
-
- if (from_method_count == 0)
- return 0;
-
- if (!__go_type_descriptors_equal (from_method->__mtype,
- to_method->__type))
- return 0;
-
- ++to_method;
- ++from_method;
- --from_method_count;
- }
-
- return 1;
-}