X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fqapi%2Fqmp-input-visitor.c;fp=qemu%2Fqapi%2Fqmp-input-visitor.c;h=e97b8a42825b5bd42c3a086c242ad35e5ed4bdf7;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/qapi/qmp-input-visitor.c b/qemu/qapi/qmp-input-visitor.c
new file mode 100644
index 000000000..e97b8a428
--- /dev/null
+++ b/qemu/qapi/qmp-input-visitor.c
@@ -0,0 +1,349 @@
+/*
+ * 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;
+}