/*
* Input Visitor
*
+ * Copyright (C) 2012-2016 Red Hat, Inc.
* Copyright IBM, Corp. 2011
*
* Authors:
*
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qapi/qmp-input-visitor.h"
#include "qapi/visitor-impl.h"
#include "qemu/queue.h"
typedef struct StackObject
{
- QObject *obj;
- const QListEntry *entry;
- GHashTable *h;
+ QObject *obj; /* Object being visited */
+
+ GHashTable *h; /* If obj is dict: unvisited keys */
+ const QListEntry *entry; /* If obj is list: unvisited tail */
+ bool first; /* If obj is list: next_list() not yet called? */
} StackObject;
struct QmpInputVisitor
{
Visitor visitor;
+
+ /* Root of visit at visitor creation. */
+ QObject *root;
+
+ /* Stack of objects being visited (all entries will be either
+ * QDict or QList). */
StackObject stack[QIV_STACK_SIZE];
int nb_stack;
+
+ /* True to reject parse in visit_end_struct() if unvisited keys remain. */
bool strict;
};
const char *name,
bool consume)
{
- QObject *qobj = qiv->stack[qiv->nb_stack - 1].obj;
+ StackObject *tos;
+ QObject *qobj;
+ QObject *ret;
- 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);
+ if (!qiv->nb_stack) {
+ /* Starting at root, name is ignored. */
+ return qiv->root;
+ }
+
+ /* We are in a container; find the next element. */
+ tos = &qiv->stack[qiv->nb_stack - 1];
+ qobj = tos->obj;
+ assert(qobj);
+
+ if (qobject_type(qobj) == QTYPE_QDICT) {
+ assert(name);
+ ret = qdict_get(qobject_to_qdict(qobj), name);
+ if (tos->h && consume && ret) {
+ bool removed = g_hash_table_remove(tos->h, name);
+ assert(removed);
+ }
+ } else {
+ assert(qobject_type(qobj) == QTYPE_QLIST);
+ assert(!name);
+ assert(!tos->first);
+ ret = qlist_entry_obj(tos->entry);
+ if (consume) {
+ tos->entry = qlist_next(tos->entry);
}
}
- return qobj;
+ return ret;
}
static void qdict_add_key(const char *key, QObject *obj, void *opaque)
static void qmp_input_push(QmpInputVisitor *qiv, QObject *obj, Error **errp)
{
GHashTable *h;
+ StackObject *tos = &qiv->stack[qiv->nb_stack];
+ assert(obj);
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;
+ tos->obj = obj;
+ assert(!tos->h);
+ assert(!tos->entry);
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;
+ tos->h = h;
+ } else if (qobject_type(obj) == QTYPE_QLIST) {
+ tos->entry = qlist_first(qobject_to_qlist(obj));
+ tos->first = true;
}
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)
{
+ StackObject *tos = &qiv->stack[qiv->nb_stack - 1];
assert(qiv->nb_stack > 0);
if (qiv->strict) {
- GHashTable * const top_ht = qiv->stack[qiv->nb_stack - 1].h;
+ GHashTable *const top_ht = tos->h;
if (top_ht) {
- if (g_hash_table_size(top_ht)) {
- const char *key;
- g_hash_table_find(top_ht, always_true, &key);
- error_set(errp, QERR_QMP_EXTRA_MEMBER, key);
+ GHashTableIter iter;
+ const char *key;
+
+ g_hash_table_iter_init(&iter, top_ht);
+ if (g_hash_table_iter_next(&iter, (void **)&key, NULL)) {
+ error_setg(errp, QERR_QMP_EXTRA_MEMBER, key);
}
g_hash_table_unref(top_ht);
}
+ tos->h = NULL;
}
qiv->nb_stack--;
}
-static void qmp_input_start_struct(Visitor *v, void **obj, const char *kind,
- const char *name, size_t size, Error **errp)
+static void qmp_input_start_struct(Visitor *v, const char *name, void **obj,
+ size_t size, Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
Error *err = NULL;
+ if (obj) {
+ *obj = NULL;
+ }
if (!qobj || qobject_type(qobj) != QTYPE_QDICT) {
- error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
- "QDict");
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "QDict");
return;
}
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");
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "list");
return;
}
}
static GenericList *qmp_input_next_list(Visitor *v, GenericList **list,
- Error **errp)
+ size_t size)
{
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) {
+ if (!so->entry) {
return NULL;
}
- entry = g_malloc0(sizeof(*entry));
- if (first) {
+ entry = g_malloc0(size);
+ if (so->first) {
*list = entry;
+ so->first = false;
} else {
(*list)->next = entry;
}
return entry;
}
-static void qmp_input_end_list(Visitor *v, Error **errp)
+static void qmp_input_end_list(Visitor *v)
{
QmpInputVisitor *qiv = to_qiv(v);
- qmp_input_pop(qiv, errp);
+ qmp_input_pop(qiv, &error_abort);
}
-static void qmp_input_get_next_type(Visitor *v, int *kind, const int *qobjects,
- const char *name, Error **errp)
+static void qmp_input_start_alternate(Visitor *v, const char *name,
+ GenericAlternate **obj, size_t size,
+ bool promote_int, 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");
+ *obj = NULL;
+ error_setg(errp, QERR_MISSING_PARAMETER, name ? name : "null");
return;
}
- *kind = qobjects[qobject_type(qobj)];
+ *obj = g_malloc0(size);
+ (*obj)->type = qobject_type(qobj);
+ if (promote_int && (*obj)->type == QTYPE_QINT) {
+ (*obj)->type = QTYPE_QFLOAT;
+ }
}
-static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name,
- Error **errp)
+static void qmp_input_type_int64(Visitor *v, const char *name, int64_t *obj,
+ Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
- QObject *qobj = qmp_input_get_object(qiv, name, true);
+ QInt *qint = qobject_to_qint(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");
+ if (!qint) {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "integer");
return;
}
- *obj = qint_get_int(qobject_to_qint(qobj));
+ *obj = qint_get_int(qint);
}
-static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name,
+static void qmp_input_type_uint64(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp)
+{
+ /* FIXME: qobject_to_qint mishandles values over INT64_MAX */
+ QmpInputVisitor *qiv = to_qiv(v);
+ QInt *qint = qobject_to_qint(qmp_input_get_object(qiv, name, true));
+
+ if (!qint) {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "integer");
+ return;
+ }
+
+ *obj = qint_get_int(qint);
+}
+
+static void qmp_input_type_bool(Visitor *v, const char *name, bool *obj,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
- QObject *qobj = qmp_input_get_object(qiv, name, true);
+ QBool *qbool = qobject_to_qbool(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");
+ if (!qbool) {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "boolean");
return;
}
- *obj = qbool_get_int(qobject_to_qbool(qobj));
+ *obj = qbool_get_bool(qbool);
}
-static void qmp_input_type_str(Visitor *v, char **obj, const char *name,
+static void qmp_input_type_str(Visitor *v, const char *name, char **obj,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
- QObject *qobj = qmp_input_get_object(qiv, name, true);
+ QString *qstr = qobject_to_qstring(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");
+ if (!qstr) {
+ *obj = NULL;
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "string");
return;
}
- *obj = g_strdup(qstring_get_str(qobject_to_qstring(qobj)));
+ *obj = g_strdup(qstring_get_str(qstr));
}
-static void qmp_input_type_number(Visitor *v, double *obj, const char *name,
+static void qmp_input_type_number(Visitor *v, const char *name, double *obj,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
+ QInt *qint;
+ QFloat *qfloat;
- if (!qobj || (qobject_type(qobj) != QTYPE_QFLOAT &&
- qobject_type(qobj) != QTYPE_QINT)) {
- error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
- "number");
+ qint = qobject_to_qint(qobj);
+ if (qint) {
+ *obj = qint_get_int(qobject_to_qint(qobj));
return;
}
- if (qobject_type(qobj) == QTYPE_QINT) {
- *obj = qint_get_int(qobject_to_qint(qobj));
- } else {
+ qfloat = qobject_to_qfloat(qobj);
+ if (qfloat) {
*obj = qfloat_get_double(qobject_to_qfloat(qobj));
+ return;
}
+
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "number");
}
-static void qmp_input_optional(Visitor *v, bool *present, const char *name,
+static void qmp_input_type_any(Visitor *v, const char *name, QObject **obj,
Error **errp)
{
QmpInputVisitor *qiv = to_qiv(v);
QObject *qobj = qmp_input_get_object(qiv, name, true);
+ qobject_incref(qobj);
+ *obj = qobj;
+}
+
+static void qmp_input_optional(Visitor *v, const char *name, bool *present)
+{
+ QmpInputVisitor *qiv = to_qiv(v);
+ QObject *qobj = qmp_input_get_object(qiv, name, false);
+
if (!qobj) {
*present = false;
return;
void qmp_input_visitor_cleanup(QmpInputVisitor *v)
{
- qobject_decref(v->stack[0].obj);
+ qobject_decref(v->root);
g_free(v);
}
-QmpInputVisitor *qmp_input_visitor_new(QObject *obj)
+QmpInputVisitor *qmp_input_visitor_new(QObject *obj, bool strict)
{
QmpInputVisitor *v;
v = g_malloc0(sizeof(*v));
+ v->visitor.type = VISITOR_INPUT;
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.start_alternate = qmp_input_start_alternate;
+ v->visitor.type_int64 = qmp_input_type_int64;
+ v->visitor.type_uint64 = qmp_input_type_uint64;
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.type_any = qmp_input_type_any;
v->visitor.optional = qmp_input_optional;
- v->visitor.get_next_type = qmp_input_get_next_type;
+ v->strict = strict;
- qmp_input_push(v, obj, NULL);
+ v->root = obj;
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;
-}
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