| /* |
| * 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 "qmp-input-visitor.h" |
| #include "qemu-queue.h" |
| #include "qemu-common.h" |
| #include "qemu-objects.h" |
| #include "qerror.h" |
| |
| #define QIV_STACK_SIZE 1024 |
| |
| typedef struct StackObject |
| { |
| const QObject *obj; |
| const QListEntry *entry; |
| } StackObject; |
| |
| struct QmpInputVisitor |
| { |
| Visitor visitor; |
| QObject *obj; |
| StackObject stack[QIV_STACK_SIZE]; |
| int nb_stack; |
| }; |
| |
| static QmpInputVisitor *to_qiv(Visitor *v) |
| { |
| return container_of(v, QmpInputVisitor, visitor); |
| } |
| |
| static const QObject *qmp_input_get_object(QmpInputVisitor *qiv, |
| const char *name) |
| { |
| const QObject *qobj; |
| |
| if (qiv->nb_stack == 0) { |
| qobj = qiv->obj; |
| } else { |
| qobj = qiv->stack[qiv->nb_stack - 1].obj; |
| } |
| |
| if (qobj) { |
| if (name && qobject_type(qobj) == QTYPE_QDICT) { |
| return qdict_get(qobject_to_qdict(qobj), name); |
| } else if (qiv->nb_stack > 0 && qobject_type(qobj) == QTYPE_QLIST) { |
| return qlist_entry_obj(qiv->stack[qiv->nb_stack - 1].entry); |
| } |
| } |
| |
| return qobj; |
| } |
| |
| static void qmp_input_push(QmpInputVisitor *qiv, const QObject *obj, Error **errp) |
| { |
| qiv->stack[qiv->nb_stack].obj = obj; |
| if (qobject_type(obj) == QTYPE_QLIST) { |
| qiv->stack[qiv->nb_stack].entry = qlist_first(qobject_to_qlist(obj)); |
| } |
| qiv->nb_stack++; |
| |
| if (qiv->nb_stack >= QIV_STACK_SIZE) { |
| error_set(errp, QERR_BUFFER_OVERRUN); |
| return; |
| } |
| } |
| |
| static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp) |
| { |
| qiv->nb_stack--; |
| if (qiv->nb_stack < 0) { |
| error_set(errp, QERR_BUFFER_OVERRUN); |
| return; |
| } |
| } |
| |
| 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); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| if (!qobj || qobject_type(qobj) != QTYPE_QDICT) { |
| error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", |
| "QDict"); |
| return; |
| } |
| |
| qmp_input_push(qiv, qobj, errp); |
| if (error_is_set(errp)) { |
| 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_list(Visitor *v, const char *name, Error **errp) |
| { |
| QmpInputVisitor *qiv = to_qiv(v); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| 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]; |
| |
| if (so->entry == NULL) { |
| return NULL; |
| } |
| |
| entry = g_malloc0(sizeof(*entry)); |
| if (*list) { |
| so->entry = qlist_next(so->entry); |
| if (so->entry == NULL) { |
| g_free(entry); |
| return NULL; |
| } |
| (*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_type_int(Visitor *v, int64_t *obj, const char *name, |
| Error **errp) |
| { |
| QmpInputVisitor *qiv = to_qiv(v); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| 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); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { |
| error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", |
| "boolean"); |
| return; |
| } |
| |
| *obj = qbool_get_int(qobject_to_qbool(qobj)); |
| } |
| |
| static void qmp_input_type_str(Visitor *v, char **obj, const char *name, |
| Error **errp) |
| { |
| QmpInputVisitor *qiv = to_qiv(v); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| 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); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| if (!qobj || qobject_type(qobj) != QTYPE_QFLOAT) { |
| error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", |
| "double"); |
| return; |
| } |
| |
| *obj = qfloat_get_double(qobject_to_qfloat(qobj)); |
| } |
| |
| static void qmp_input_type_enum(Visitor *v, int *obj, const char *strings[], |
| const char *kind, const char *name, |
| Error **errp) |
| { |
| int64_t value = 0; |
| char *enum_str; |
| |
| assert(strings); |
| |
| qmp_input_type_str(v, &enum_str, name, errp); |
| if (error_is_set(errp)) { |
| return; |
| } |
| |
| while (strings[value] != NULL) { |
| if (strcmp(strings[value], enum_str) == 0) { |
| break; |
| } |
| value++; |
| } |
| |
| if (strings[value] == NULL) { |
| error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null"); |
| g_free(enum_str); |
| return; |
| } |
| |
| g_free(enum_str); |
| *obj = value; |
| } |
| |
| static void qmp_input_start_optional(Visitor *v, bool *present, |
| const char *name, Error **errp) |
| { |
| QmpInputVisitor *qiv = to_qiv(v); |
| const QObject *qobj = qmp_input_get_object(qiv, name); |
| |
| if (!qobj) { |
| *present = false; |
| return; |
| } |
| |
| *present = true; |
| } |
| |
| static void qmp_input_end_optional(Visitor *v, Error **errp) |
| { |
| } |
| |
| Visitor *qmp_input_get_visitor(QmpInputVisitor *v) |
| { |
| return &v->visitor; |
| } |
| |
| void qmp_input_visitor_cleanup(QmpInputVisitor *v) |
| { |
| qobject_decref(v->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_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 = qmp_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.start_optional = qmp_input_start_optional; |
| v->visitor.end_optional = qmp_input_end_optional; |
| |
| v->obj = obj; |
| qobject_incref(v->obj); |
| |
| return v; |
| } |