A type of Visiter class that is used to walk a qobject's structure and assign each entry to the corresponding native C type. Command marshaling function will use this to pull out QMP command parameters recieved over the wire and pass them as native arguments to the corresponding C functions.
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com> --- qapi/qmp-input-visiter.c | 239 ++++++++++++++++++++++++++++++++++++++++++++++ qapi/qmp-input-visiter.h | 26 +++++ 2 files changed, 265 insertions(+), 0 deletions(-) create mode 100644 qapi/qmp-input-visiter.c create mode 100644 qapi/qmp-input-visiter.h diff --git a/qapi/qmp-input-visiter.c b/qapi/qmp-input-visiter.c new file mode 100644 index 0000000..6767e39 --- /dev/null +++ b/qapi/qmp-input-visiter.c @@ -0,0 +1,239 @@ +#include "qmp-input-visiter.h" +#include "qemu-queue.h" +#include "qemu-common.h" +#include "qemu-objects.h" +#include "qerror.h" + +#define QAPI_OBJECT_SIZE 512 + +#define QIV_STACK_SIZE 1024 + +typedef struct StackObject +{ + QObject *obj; + QListEntry *entry; +} StackObject; + +struct QmpInputVisiter +{ + Visiter visiter; + QObject *obj; + StackObject stack[QIV_STACK_SIZE]; + int nb_stack; +}; + +static QmpInputVisiter *to_qiv(Visiter *v) +{ + return container_of(v, QmpInputVisiter, visiter); +} + +static QObject *qmp_input_get_object(QmpInputVisiter *qiv, const char *name) +{ + QObject *qobj; + + if (qiv->nb_stack == 0) { + qobj = qiv->obj; + } else { + qobj = qiv->stack[qiv->nb_stack - 1].obj; + } + + 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(QmpInputVisiter *qiv, QObject *obj) +{ + 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++; + + assert(qiv->nb_stack < QIV_STACK_SIZE); // FIXME +} + +static void qmp_input_pop(QmpInputVisiter *qiv) +{ + qiv->nb_stack--; + assert(qiv->nb_stack >= 0); // FIXME +} + +static void qmp_input_start_struct(Visiter *v, void **obj, const char *kind, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QDICT) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "object"); + return; + } + + qmp_input_push(qiv, qobj); + + if (obj) { + *obj = qemu_mallocz(QAPI_OBJECT_SIZE); + } +} + +static void qmp_input_end_struct(Visiter *v, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + + qmp_input_pop(qiv); +} + +static void qmp_input_start_list(Visiter *v, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QLIST) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "list"); + return; + } + + qmp_input_push(qiv, qobj); +} + +static GenericList *qmp_input_next_list(Visiter *v, GenericList **list, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + GenericList *entry; + StackObject *so = &qiv->stack[qiv->nb_stack - 1]; + + if (so->entry == NULL) { + return NULL; + } + + entry = qemu_mallocz(sizeof(*entry)); + if (*list) { + so->entry = qlist_next(so->entry); + if (so->entry == NULL) { + qemu_free(entry); + return NULL; + } + (*list)->next = entry; + } + *list = entry; + + + return entry; +} + +static void qmp_input_end_list(Visiter *v, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + + qmp_input_pop(qiv); +} + +static void qmp_input_type_int(Visiter *v, int64_t *obj, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QINT) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "integer"); + return; + } + + *obj = qint_get_int(qobject_to_qint(qobj)); +} + +static void qmp_input_type_bool(Visiter *v, bool *obj, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); + return; + } + + *obj = qbool_get_int(qobject_to_qbool(qobj)); +} + +static void qmp_input_type_str(Visiter *v, char **obj, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); + return; + } + + *obj = qemu_strdup(qstring_get_str(qobject_to_qstring(qobj))); +} + +static void qmp_input_type_number(Visiter *v, double *obj, const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj || qobject_type(qobj) != QTYPE_QFLOAT) { + error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "double"); + return; + } + + *obj = qfloat_get_double(qobject_to_qfloat(qobj)); +} + +static void qmp_input_type_enum(Visiter *v, int *obj, const char *kind, const char *name, Error **errp) +{ + int64_t value; + qmp_input_type_int(v, &value, name, errp); + *obj = value; +} + +static void qmp_input_start_optional(Visiter *v, bool *present, + const char *name, Error **errp) +{ + QmpInputVisiter *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name); + + if (!qobj) { + *present = false; + return; + } + + *present = true; +} + +static void qmp_input_end_optional(Visiter *v, Error **errp) +{ +} + +Visiter *qmp_input_get_visiter(QmpInputVisiter *v) +{ + return &v->visiter; +} + +QmpInputVisiter *qmp_input_visiter_new(QObject *obj) +{ + QmpInputVisiter *v; + + v = qemu_mallocz(sizeof(*v)); + + v->visiter.start_struct = qmp_input_start_struct; + v->visiter.end_struct = qmp_input_end_struct; + v->visiter.start_list = qmp_input_start_list; + v->visiter.next_list = qmp_input_next_list; + v->visiter.end_list = qmp_input_end_list; + v->visiter.type_enum = qmp_input_type_enum; + v->visiter.type_int = qmp_input_type_int; + v->visiter.type_bool = qmp_input_type_bool; + v->visiter.type_str = qmp_input_type_str; + v->visiter.type_number = qmp_input_type_number; + v->visiter.start_optional = qmp_input_start_optional; + v->visiter.end_optional = qmp_input_end_optional; + + v->obj = obj; + + return v; +} diff --git a/qapi/qmp-input-visiter.h b/qapi/qmp-input-visiter.h new file mode 100644 index 0000000..3e4d06f --- /dev/null +++ b/qapi/qmp-input-visiter.h @@ -0,0 +1,26 @@ +/* + * Input Visiter + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Anthony Liguori <aligu...@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. + * + */ + +#ifndef QMP_INPUT_VISITER_H +#define QMP_INPUT_VISITER_H + +#include "qapi-visit-core.h" +#include "qobject.h" + +typedef struct QmpInputVisiter QmpInputVisiter; + +QmpInputVisiter *qmp_input_visiter_new(QObject *obj); + +Visiter *qmp_input_get_visiter(QmpInputVisiter *v); + +#endif -- 1.7.0.4