unicorn/qemu/qapi/qmp-input-visitor.c
Eric Blake d544d83348
qobject: Use 'bool' for qbool
We require a C99 compiler, so let's use 'bool' instead of 'int'
when dealing with boolean values. There are few enough clients
to fix them all in one pass.

Backports commit fc48ffc39ed1060856475e4320d5896f26c945e8 from qemu
2018-02-17 15:23:09 -05:00

350 lines
8.9 KiB
C

/*
* Input Visitor
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* 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 "qapi/qmp-input-visitor.h"
#include "qapi/visitor-impl.h"
#include "qemu/queue.h"
#include "qemu-common.h"
#include "qapi/qmp/types.h"
#include "qapi/qmp/qerror.h"
#define QIV_STACK_SIZE 1024
typedef struct StackObject
{
QObject *obj;
const QListEntry *entry;
GHashTable *h;
} StackObject;
struct QmpInputVisitor
{
Visitor visitor;
StackObject stack[QIV_STACK_SIZE];
int nb_stack;
bool strict;
};
static QmpInputVisitor *to_qiv(Visitor *v)
{
return container_of(v, QmpInputVisitor, visitor);
}
static QObject *qmp_input_get_object(QmpInputVisitor *qiv,
const char *name,
bool consume)
{
QObject *qobj = qiv->stack[qiv->nb_stack - 1].obj;
if (qobj) {
if (name && qobject_type(qobj) == QTYPE_QDICT) {
if (qiv->stack[qiv->nb_stack - 1].h && consume) {
g_hash_table_remove(qiv->stack[qiv->nb_stack - 1].h, name);
}
return qdict_get(qobject_to_qdict(qobj), name);
} else if (qiv->stack[qiv->nb_stack - 1].entry) {
return qlist_entry_obj(qiv->stack[qiv->nb_stack - 1].entry);
}
}
return qobj;
}
static void qdict_add_key(const char *key, QObject *obj, void *opaque)
{
GHashTable *h = opaque;
g_hash_table_insert(h, (gpointer) key, NULL);
}
static void qmp_input_push(QmpInputVisitor *qiv, QObject *obj, Error **errp)
{
GHashTable *h;
if (qiv->nb_stack >= QIV_STACK_SIZE) {
error_setg(errp, "An internal buffer overran");
return;
}
qiv->stack[qiv->nb_stack].obj = obj;
qiv->stack[qiv->nb_stack].entry = NULL;
qiv->stack[qiv->nb_stack].h = NULL;
if (qiv->strict && qobject_type(obj) == QTYPE_QDICT) {
h = g_hash_table_new(g_str_hash, g_str_equal);
qdict_iter(qobject_to_qdict(obj), qdict_add_key, h);
qiv->stack[qiv->nb_stack].h = h;
}
qiv->nb_stack++;
}
/** Only for qmp_input_pop. */
static gboolean always_true(gpointer key, gpointer val, gpointer user_pkey)
{
*(const char **)user_pkey = (const char *)key;
return TRUE;
}
static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp)
{
assert(qiv->nb_stack > 0);
if (qiv->strict) {
GHashTable * const top_ht = qiv->stack[qiv->nb_stack - 1].h;
if (top_ht) {
if (g_hash_table_size(top_ht)) {
const char *key;
g_hash_table_find(top_ht, always_true, (gpointer)&key);
error_set(errp, QERR_QMP_EXTRA_MEMBER, key);
}
g_hash_table_unref(top_ht);
}
}
qiv->nb_stack--;
}
static void qmp_input_start_struct(Visitor *v, void **obj, const char *kind,
const char *name, size_t size, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
Error *err = NULL;
if (!qobj || qobject_type(qobj) != QTYPE_QDICT) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"QDict");
return;
}
qmp_input_push(qiv, qobj, &err);
if (err) {
error_propagate(errp, err);
return;
}
if (obj) {
*obj = g_malloc0(size);
}
}
static void qmp_input_end_struct(Visitor *v, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
qmp_input_pop(qiv, errp);
}
static void qmp_input_start_implicit_struct(Visitor *v, void **obj,
size_t size, Error **errp)
{
if (obj) {
*obj = g_malloc0(size);
}
}
static void qmp_input_end_implicit_struct(Visitor *v, Error **errp)
{
}
static void qmp_input_start_list(Visitor *v, const char *name, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj || qobject_type(qobj) != QTYPE_QLIST) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"list");
return;
}
qmp_input_push(qiv, qobj, errp);
}
static GenericList *qmp_input_next_list(Visitor *v, GenericList **list,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
GenericList *entry;
StackObject *so = &qiv->stack[qiv->nb_stack - 1];
bool first;
if (so->entry == NULL) {
so->entry = qlist_first(qobject_to_qlist(so->obj));
first = true;
} else {
so->entry = qlist_next(so->entry);
first = false;
}
if (so->entry == NULL) {
return NULL;
}
entry = g_malloc0(sizeof(*entry));
if (first) {
*list = entry;
} else {
(*list)->next = entry;
}
return entry;
}
static void qmp_input_end_list(Visitor *v, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
qmp_input_pop(qiv, errp);
}
static void qmp_input_get_next_type(Visitor *v, int *kind, const int *qobjects,
const char *name, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, false);
if (!qobj) {
error_set(errp, QERR_MISSING_PARAMETER, name ? name : "null");
return;
}
*kind = qobjects[qobject_type(qobj)];
}
static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj || qobject_type(qobj) != QTYPE_QINT) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"integer");
return;
}
*obj = qint_get_int(qobject_to_qint(qobj));
}
static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"boolean");
return;
}
*obj = qbool_get_bool(qobject_to_qbool(qobj));
}
static void qmp_input_type_str(Visitor *v, char **obj, const char *name,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"string");
return;
}
*obj = g_strdup(qstring_get_str(qobject_to_qstring(qobj)));
}
static void qmp_input_type_number(Visitor *v, double *obj, const char *name,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj || (qobject_type(qobj) != QTYPE_QFLOAT &&
qobject_type(qobj) != QTYPE_QINT)) {
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"number");
return;
}
if (qobject_type(qobj) == QTYPE_QINT) {
*obj = (double)qint_get_int(qobject_to_qint(qobj));
} else {
*obj = qfloat_get_double(qobject_to_qfloat(qobj));
}
}
static void qmp_input_optional(Visitor *v, bool *present, const char *name,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
if (!qobj) {
*present = false;
return;
}
*present = true;
}
Visitor *qmp_input_get_visitor(QmpInputVisitor *v)
{
return &v->visitor;
}
void qmp_input_visitor_cleanup(QmpInputVisitor *v)
{
qobject_decref(v->stack[0].obj);
g_free(v);
}
QmpInputVisitor *qmp_input_visitor_new(QObject *obj)
{
QmpInputVisitor *v;
v = g_malloc0(sizeof(*v));
v->visitor.start_struct = qmp_input_start_struct;
v->visitor.end_struct = qmp_input_end_struct;
v->visitor.start_implicit_struct = qmp_input_start_implicit_struct;
v->visitor.end_implicit_struct = qmp_input_end_implicit_struct;
v->visitor.start_list = qmp_input_start_list;
v->visitor.next_list = qmp_input_next_list;
v->visitor.end_list = qmp_input_end_list;
v->visitor.type_enum = input_type_enum;
v->visitor.type_int = qmp_input_type_int;
v->visitor.type_bool = qmp_input_type_bool;
v->visitor.type_str = qmp_input_type_str;
v->visitor.type_number = qmp_input_type_number;
v->visitor.optional = qmp_input_optional;
v->visitor.get_next_type = qmp_input_get_next_type;
qmp_input_push(v, obj, NULL);
qobject_incref(obj);
return v;
}
QmpInputVisitor *qmp_input_visitor_new_strict(QObject *obj)
{
QmpInputVisitor *v;
v = qmp_input_visitor_new(obj);
v->strict = true;
return v;
}