xref: /openbmc/qemu/include/qapi/opts-visitor.h (revision c09124dc)
1 /*
2  * Options Visitor
3  *
4  * Copyright Red Hat, Inc. 2012
5  *
6  * Author: Laszlo Ersek <lersek@redhat.com>
7  *
8  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
9  * See the COPYING.LIB file in the top-level directory.
10  *
11  */
12 
13 #ifndef OPTS_VISITOR_H
14 #define OPTS_VISITOR_H
15 
16 #include "qapi/visitor.h"
17 
18 /* Inclusive upper bound on the size of any flattened range. This is a safety
19  * (= anti-annoyance) measure; wrong ranges should not cause long startup
20  * delays nor exhaust virtual memory.
21  */
22 #define OPTS_VISITOR_RANGE_MAX 65536
23 
24 typedef struct OptsVisitor OptsVisitor;
25 
26 /* Contrarily to qemu-option.c::parse_option_number(), OptsVisitor's "int"
27  * parser relies on strtoll() instead of strtoull(). Consequences:
28  * - string representations of negative numbers yield negative values,
29  * - values below INT64_MIN or LLONG_MIN are rejected,
30  * - values above INT64_MAX or LLONG_MAX are rejected.
31  *
32  * The Opts input visitor does not implement support for visiting QAPI
33  * alternates, numbers (other than integers), null, or arbitrary
34  * QTypes.  It also requires a non-null list argument to
35  * visit_start_list().
36  */
37 Visitor *opts_visitor_new(const QemuOpts *opts);
38 
39 #endif
40