--- /dev/null
+/*
+ * 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, &key);
+ error_setg(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_setg(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_setg(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_setg(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_setg(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_setg(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_setg(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_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "number");
+ return;
+ }
+
+ if (qobject_type(qobj) == QTYPE_QINT) {
+ *obj = 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;
+}
Code Review / kvmfornfv.git / blobdiff