/*
* Forward Visitor
*
* Copyright (C) 2021 Red Hat, Inc.
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qapi/compat-policy.h"
#include "qapi/error.h"
#include "qapi/forward-visitor.h"
#include "qapi/visitor-impl.h"
#include "qemu/queue.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qlist.h"
#include "qapi/qmp/qnull.h"
#include "qapi/qmp/qnum.h"
#include "qapi/qmp/qstring.h"
#include "qemu/cutils.h"
#include "qemu/option.h"
struct ForwardFieldVisitor {
Visitor visitor;
Visitor *target;
char *from;
char *to;
int depth;
};
static ForwardFieldVisitor *to_ffv(Visitor *v)
{
return container_of(v, ForwardFieldVisitor, visitor);
}
static bool forward_field_translate_name(ForwardFieldVisitor *v, const char **name,
Error **errp)
{
if (v->depth) {
return true;
}
if (g_str_equal(*name, v->from)) {
*name = v->to;
return true;
}
error_setg(errp, QERR_MISSING_PARAMETER, *name);
return false;
}
static bool forward_field_check_struct(Visitor *v, Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
return visit_check_struct(ffv->target, errp);
}
static bool forward_field_start_struct(Visitor *v, const char *name, void **obj,
size_t size, Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
if (!visit_start_struct(ffv->target, name, obj, size, errp)) {
return false;
}
ffv->depth++;
return true;
}
static void forward_field_end_struct(Visitor *v, void **obj)
{
ForwardFieldVisitor *ffv = to_ffv(v);
assert(ffv->depth);
ffv->depth--;
visit_end_struct(ffv->target, obj);
}
static bool forward_field_start_list(Visitor *v, const char *name,
GenericList **list, size_t size,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
ffv->depth++;
return visit_start_list(ffv->target, name, list, size, errp);
}
static GenericList *forward_field_next_list(Visitor *v, GenericList *tail,
size_t size)
{
ForwardFieldVisitor *ffv = to_ffv(v);
assert(ffv->depth);
return visit_next_list(ffv->target, tail, size);
}
static bool forward_field_check_list(Visitor *v, Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
assert(ffv->depth);
return visit_check_list(ffv->target, errp);
}
static void forward_field_end_list(Visitor *v, void **obj)
{
ForwardFieldVisitor *ffv = to_ffv(v);
assert(ffv->depth);
ffv->depth--;
visit_end_list(ffv->target, obj);
}
static bool forward_field_start_alternate(Visitor *v, const char *name,
GenericAlternate **obj, size_t size,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
/*
* The name passed to start_alternate is used also in the visit_type_* calls
* that retrieve the alternate's content; so, do not increase depth here.
*/
return visit_start_alternate(ffv->target, name, obj, size, errp);
}
static void forward_field_end_alternate(Visitor *v, void **obj)
{
ForwardFieldVisitor *ffv = to_ffv(v);
visit_end_alternate(ffv->target, obj);
}
static bool forward_field_type_int64(Visitor *v, const char *name, int64_t *obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_int64(ffv->target, name, obj, errp);
}
static bool forward_field_type_uint64(Visitor *v, const char *name,
uint64_t *obj, Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_uint64(ffv->target, name, obj, errp);
}
static bool forward_field_type_bool(Visitor *v, const char *name, bool *obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_bool(ffv->target, name, obj, errp);
}
static bool forward_field_type_str(Visitor *v, const char *name, char **obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_str(ffv->target, name, obj, errp);
}
static bool forward_field_type_size(Visitor *v, const char *name, uint64_t *obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_size(ffv->target, name, obj, errp);
}
static bool forward_field_type_number(Visitor *v, const char *name, double *obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_number(ffv->target, name, obj, errp);
}
static bool forward_field_type_any(Visitor *v, const char *name, QObject **obj,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_any(ffv->target, name, obj, errp);
}
static bool forward_field_type_null(Visitor *v, const char *name,
QNull **obj, Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_type_null(ffv->target, name, obj, errp);
}
static void forward_field_optional(Visitor *v, const char *name, bool *present)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, NULL)) {
*present = false;
return;
}
visit_optional(ffv->target, name, present);
}
static bool forward_field_deprecated_accept(Visitor *v, const char *name,
Error **errp)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, errp)) {
return false;
}
return visit_deprecated_accept(ffv->target, name, errp);
}
static bool forward_field_deprecated(Visitor *v, const char *name)
{
ForwardFieldVisitor *ffv = to_ffv(v);
if (!forward_field_translate_name(ffv, &name, NULL)) {
return false;
}
return visit_deprecated(ffv->target, name);
}
static void forward_field_complete(Visitor *v, void *opaque)
{
/*
* Do nothing, the complete method will be called in due time
* on the target visitor.
*/
}
static void forward_field_free(Visitor *v)
{
ForwardFieldVisitor *ffv = to_ffv(v);
g_free(ffv->from);
g_free(ffv->to);
g_free(ffv);
}
Visitor *visitor_forward_field(Visitor *target, const char *from, const char *to)
{
ForwardFieldVisitor *v = g_new0(ForwardFieldVisitor, 1);
/*
* Clone and dealloc visitors don't use a name for the toplevel
* visit, so they make no sense here.
*/
assert(target->type == VISITOR_OUTPUT || target->type == VISITOR_INPUT);
v->visitor.type = target->type;
v->visitor.start_struct = forward_field_start_struct;
v->visitor.check_struct = forward_field_check_struct;
v->visitor.end_struct = forward_field_end_struct;
v->visitor.start_list = forward_field_start_list;
v->visitor.next_list = forward_field_next_list;
v->visitor.check_list = forward_field_check_list;
v->visitor.end_list = forward_field_end_list;
v->visitor.start_alternate = forward_field_start_alternate;
v->visitor.end_alternate = forward_field_end_alternate;
v->visitor.type_int64 = forward_field_type_int64;
v->visitor.type_uint64 = forward_field_type_uint64;
v->visitor.type_size = forward_field_type_size;
v->visitor.type_bool = forward_field_type_bool;
v->visitor.type_str = forward_field_type_str;
v->visitor.type_number = forward_field_type_number;
v->visitor.type_any = forward_field_type_any;
v->visitor.type_null = forward_field_type_null;
v->visitor.optional = forward_field_optional;
v->visitor.deprecated_accept = forward_field_deprecated_accept;
v->visitor.deprecated = forward_field_deprecated;
v->visitor.complete = forward_field_complete;
v->visitor.free = forward_field_free;
v->target = target;
v->from = g_strdup(from);
v->to = g_strdup(to);
return &v->visitor;
}
