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qapi: New QAPI_CLONE_MEMBERS()

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QAPI_CLONE() returns a newly allocated QAPI object.  Inconvenient when
we want to clone into an existing object.  QAPI_CLONE_MEMBERS() does
exactly that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-4-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2017-04-26 09:36:38 +02:00
parent 0785bd7a7c
commit 4626a19c86
2 changed files with 27 additions and 0 deletions
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13
qapi/qapi-clone-visitor.c
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@ -180,3 +180,16 @@ void *qapi_clone(const void *src, void (*visit_type)(Visitor *, const char *,
visit_free(v);
return dst;
}
void qapi_clone_members(void *dst, const void *src, size_t sz,
void (*visit_type_members)(Visitor *, void *,
Error **))
{
Visitor *v;
v = qapi_clone_visitor_new();
memcpy(dst, src, sz);
to_qcv(v)->depth++;
visit_type_members(v, dst, &error_abort);
visit_free(v);
}