4 * Copyright (C) 2021 Red Hat, Inc.
6 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
7 * See the COPYING.LIB file in the top-level directory.
11 #include "qemu/osdep.h"
12 #include "qapi/compat-policy.h"
13 #include "qapi/error.h"
14 #include "qapi/forward-visitor.h"
15 #include "qapi/visitor-impl.h"
16 #include "qemu/queue.h"
17 #include "qapi/qmp/qjson.h"
18 #include "qapi/qmp/qbool.h"
19 #include "qapi/qmp/qdict.h"
20 #include "qapi/qmp/qerror.h"
21 #include "qapi/qmp/qlist.h"
22 #include "qapi/qmp/qnull.h"
23 #include "qapi/qmp/qnum.h"
24 #include "qapi/qmp/qstring.h"
25 #include "qemu/cutils.h"
26 #include "qemu/option.h"
28 struct ForwardFieldVisitor {
38 static ForwardFieldVisitor *to_ffv(Visitor *v)
40 return container_of(v, ForwardFieldVisitor, visitor);
43 static bool forward_field_translate_name(ForwardFieldVisitor *v, const char **name,
49 if (g_str_equal(*name, v->from)) {
53 error_setg(errp, QERR_MISSING_PARAMETER, *name);
57 static bool forward_field_check_struct(Visitor *v, Error **errp)
59 ForwardFieldVisitor *ffv = to_ffv(v);
61 return visit_check_struct(ffv->target, errp);
64 static bool forward_field_start_struct(Visitor *v, const char *name, void **obj,
65 size_t size, Error **errp)
67 ForwardFieldVisitor *ffv = to_ffv(v);
69 if (!forward_field_translate_name(ffv, &name, errp)) {
72 if (!visit_start_struct(ffv->target, name, obj, size, errp)) {
79 static void forward_field_end_struct(Visitor *v, void **obj)
81 ForwardFieldVisitor *ffv = to_ffv(v);
85 visit_end_struct(ffv->target, obj);
88 static bool forward_field_start_list(Visitor *v, const char *name,
89 GenericList **list, size_t size,
92 ForwardFieldVisitor *ffv = to_ffv(v);
94 if (!forward_field_translate_name(ffv, &name, errp)) {
98 return visit_start_list(ffv->target, name, list, size, errp);
101 static GenericList *forward_field_next_list(Visitor *v, GenericList *tail,
104 ForwardFieldVisitor *ffv = to_ffv(v);
107 return visit_next_list(ffv->target, tail, size);
110 static bool forward_field_check_list(Visitor *v, Error **errp)
112 ForwardFieldVisitor *ffv = to_ffv(v);
115 return visit_check_list(ffv->target, errp);
118 static void forward_field_end_list(Visitor *v, void **obj)
120 ForwardFieldVisitor *ffv = to_ffv(v);
124 visit_end_list(ffv->target, obj);
127 static bool forward_field_start_alternate(Visitor *v, const char *name,
128 GenericAlternate **obj, size_t size,
131 ForwardFieldVisitor *ffv = to_ffv(v);
133 if (!forward_field_translate_name(ffv, &name, errp)) {
137 * The name passed to start_alternate is used also in the visit_type_* calls
138 * that retrieve the alternate's content; so, do not increase depth here.
140 return visit_start_alternate(ffv->target, name, obj, size, errp);
143 static void forward_field_end_alternate(Visitor *v, void **obj)
145 ForwardFieldVisitor *ffv = to_ffv(v);
147 visit_end_alternate(ffv->target, obj);
150 static bool forward_field_type_int64(Visitor *v, const char *name, int64_t *obj,
153 ForwardFieldVisitor *ffv = to_ffv(v);
155 if (!forward_field_translate_name(ffv, &name, errp)) {
158 return visit_type_int64(ffv->target, name, obj, errp);
161 static bool forward_field_type_uint64(Visitor *v, const char *name,
162 uint64_t *obj, Error **errp)
164 ForwardFieldVisitor *ffv = to_ffv(v);
166 if (!forward_field_translate_name(ffv, &name, errp)) {
169 return visit_type_uint64(ffv->target, name, obj, errp);
172 static bool forward_field_type_bool(Visitor *v, const char *name, bool *obj,
175 ForwardFieldVisitor *ffv = to_ffv(v);
177 if (!forward_field_translate_name(ffv, &name, errp)) {
180 return visit_type_bool(ffv->target, name, obj, errp);
183 static bool forward_field_type_str(Visitor *v, const char *name, char **obj,
186 ForwardFieldVisitor *ffv = to_ffv(v);
188 if (!forward_field_translate_name(ffv, &name, errp)) {
191 return visit_type_str(ffv->target, name, obj, errp);
194 static bool forward_field_type_size(Visitor *v, const char *name, uint64_t *obj,
197 ForwardFieldVisitor *ffv = to_ffv(v);
199 if (!forward_field_translate_name(ffv, &name, errp)) {
202 return visit_type_size(ffv->target, name, obj, errp);
205 static bool forward_field_type_number(Visitor *v, const char *name, double *obj,
208 ForwardFieldVisitor *ffv = to_ffv(v);
210 if (!forward_field_translate_name(ffv, &name, errp)) {
213 return visit_type_number(ffv->target, name, obj, errp);
216 static bool forward_field_type_any(Visitor *v, const char *name, QObject **obj,
219 ForwardFieldVisitor *ffv = to_ffv(v);
221 if (!forward_field_translate_name(ffv, &name, errp)) {
224 return visit_type_any(ffv->target, name, obj, errp);
227 static bool forward_field_type_null(Visitor *v, const char *name,
228 QNull **obj, Error **errp)
230 ForwardFieldVisitor *ffv = to_ffv(v);
232 if (!forward_field_translate_name(ffv, &name, errp)) {
235 return visit_type_null(ffv->target, name, obj, errp);
238 static void forward_field_optional(Visitor *v, const char *name, bool *present)
240 ForwardFieldVisitor *ffv = to_ffv(v);
242 if (!forward_field_translate_name(ffv, &name, NULL)) {
246 visit_optional(ffv->target, name, present);
249 static bool forward_field_deprecated_accept(Visitor *v, const char *name,
252 ForwardFieldVisitor *ffv = to_ffv(v);
254 if (!forward_field_translate_name(ffv, &name, errp)) {
257 return visit_deprecated_accept(ffv->target, name, errp);
260 static bool forward_field_deprecated(Visitor *v, const char *name)
262 ForwardFieldVisitor *ffv = to_ffv(v);
264 if (!forward_field_translate_name(ffv, &name, NULL)) {
267 return visit_deprecated(ffv->target, name);
270 static void forward_field_complete(Visitor *v, void *opaque)
273 * Do nothing, the complete method will be called in due time
274 * on the target visitor.
278 static void forward_field_free(Visitor *v)
280 ForwardFieldVisitor *ffv = to_ffv(v);
287 Visitor *visitor_forward_field(Visitor *target, const char *from, const char *to)
289 ForwardFieldVisitor *v = g_new0(ForwardFieldVisitor, 1);
292 * Clone and dealloc visitors don't use a name for the toplevel
293 * visit, so they make no sense here.
295 assert(target->type == VISITOR_OUTPUT || target->type == VISITOR_INPUT);
297 v->visitor.type = target->type;
298 v->visitor.start_struct = forward_field_start_struct;
299 v->visitor.check_struct = forward_field_check_struct;
300 v->visitor.end_struct = forward_field_end_struct;
301 v->visitor.start_list = forward_field_start_list;
302 v->visitor.next_list = forward_field_next_list;
303 v->visitor.check_list = forward_field_check_list;
304 v->visitor.end_list = forward_field_end_list;
305 v->visitor.start_alternate = forward_field_start_alternate;
306 v->visitor.end_alternate = forward_field_end_alternate;
307 v->visitor.type_int64 = forward_field_type_int64;
308 v->visitor.type_uint64 = forward_field_type_uint64;
309 v->visitor.type_size = forward_field_type_size;
310 v->visitor.type_bool = forward_field_type_bool;
311 v->visitor.type_str = forward_field_type_str;
312 v->visitor.type_number = forward_field_type_number;
313 v->visitor.type_any = forward_field_type_any;
314 v->visitor.type_null = forward_field_type_null;
315 v->visitor.optional = forward_field_optional;
316 v->visitor.deprecated_accept = forward_field_deprecated_accept;
317 v->visitor.deprecated = forward_field_deprecated;
318 v->visitor.complete = forward_field_complete;
319 v->visitor.free = forward_field_free;
322 v->from = g_strdup(from);
323 v->to = g_strdup(to);