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/*
* Clone Visitor
*
* Copyright (C) 2016 Red Hat, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef QAPI_CLONE_VISITOR_H
#define QAPI_CLONE_VISITOR_H
#include "qapi/error.h"
#include "qapi/visitor.h"
/*
* The clone visitor is for direct use only by the QAPI_CLONE() macro;
* it requires that the root visit occur on an object, list, or
* alternate, and is not usable directly on built-in QAPI types.
*/
typedef struct QapiCloneVisitor QapiCloneVisitor;
Visitor *qapi_clone_visitor_new(void);
Visitor *qapi_clone_members_visitor_new(void);
/*
* Deep-clone QAPI object @src of the given @type, and return the result.
*
* Not usable on QAPI scalars (integers, strings, enums), nor on a
* QAPI object that references the 'any' type. Safe when @src is NULL.
*/
#define QAPI_CLONE(type, src) \
({ \
Visitor *v_; \
type *dst_ = (type *) (src); /* Cast away const */ \
\
if (dst_) { \
v_ = qapi_clone_visitor_new(); \
visit_type_ ## type(v_, NULL, &dst_, &error_abort); \
visit_free(v_); \
} \
dst_; \
})
/*
* Copy deep clones of @type members from @src to @dst.
*
* Not usable on QAPI scalars (integers, strings, enums), nor on a
* QAPI object that references the 'any' type.
*/
#define QAPI_CLONE_MEMBERS(type, dst, src) \
({ \
Visitor *v_; \
\
v_ = qapi_clone_members_visitor_new(); \
*(type *)(dst) = *(src); \
visit_type_ ## type ## _members(v_, (type *)(dst), &error_abort); \
visit_free(v_); \
})
#endif
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