Type of Visiter class that serves as the inverse of the input visiter: it takes a series of native C types and uses their values to construct a corresponding QObject. The command marshaling/dispatcher functions will use this to convert the output of QMP functions into a QObject that can be sent over the wire.
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com> --- qapi/qmp-output-visiter.c | 180 +++++++++++++++++++++++++++++++++++++++++++++ qapi/qmp-output-visiter.h | 27 +++++++ 2 files changed, 207 insertions(+), 0 deletions(-) create mode 100644 qapi/qmp-output-visiter.c create mode 100644 qapi/qmp-output-visiter.h diff --git a/qapi/qmp-output-visiter.c b/qapi/qmp-output-visiter.c new file mode 100644 index 0000000..4a7cb36 --- /dev/null +++ b/qapi/qmp-output-visiter.c @@ -0,0 +1,180 @@ +#include "qmp-output-visiter.h" +#include "qemu-queue.h" +#include "qemu-common.h" +#include "qemu-objects.h" + +typedef struct QStackEntry +{ + QObject *value; + QTAILQ_ENTRY(QStackEntry) node; +} QStackEntry; + +typedef QTAILQ_HEAD(QStack, QStackEntry) QStack; + +struct QmpOutputVisiter +{ + Visiter visiter; + QStack stack; +}; + +#define qmp_output_add(qov, name, value) qmp_output_add_obj(qov, name, QOBJECT(value)) +#define qmp_output_push(qov, value) qmp_output_push_obj(qov, QOBJECT(value)) + +static QmpOutputVisiter *to_qov(Visiter *v) +{ + return container_of(v, QmpOutputVisiter, visiter); +} + +static void qmp_output_push_obj(QmpOutputVisiter *qov, QObject *value) +{ + QStackEntry *e = qemu_mallocz(sizeof(*e)); + + e->value = value; + QTAILQ_INSERT_HEAD(&qov->stack, e, node); +} + +static QObject *qmp_output_pop(QmpOutputVisiter *qov) +{ + QStackEntry *e = QTAILQ_FIRST(&qov->stack); + QObject *value; + QTAILQ_REMOVE(&qov->stack, e, node); + value = e->value; + qemu_free(e); + return value; +} + +static QObject *qmp_output_first(QmpOutputVisiter *qov) +{ + QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack); + return e->value; +} + +static QObject *qmp_output_last(QmpOutputVisiter *qov) +{ + QStackEntry *e = QTAILQ_FIRST(&qov->stack); + return e->value; +} + +static void qmp_output_add_obj(QmpOutputVisiter *qov, const char *name, QObject *value) +{ + QObject *cur; + + if (QTAILQ_EMPTY(&qov->stack)) { + qmp_output_push_obj(qov, value); + return; + } + + cur = qmp_output_last(qov); + + switch (qobject_type(cur)) { + case QTYPE_QDICT: + qdict_put_obj(qobject_to_qdict(cur), name, value); + break; + case QTYPE_QLIST: + qlist_append_obj(qobject_to_qlist(cur), value); + break; + default: + qobject_decref(qmp_output_pop(qov)); + qmp_output_push_obj(qov, value); + break; + } +} + +static void qmp_output_start_struct(Visiter *v, void **obj, const char *kind, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + QDict *dict = qdict_new(); + + qmp_output_add(qov, name, dict); + qmp_output_push(qov, dict); +} + +static void qmp_output_end_struct(Visiter *v, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_pop(qov); +} + +static void qmp_output_start_list(Visiter *v, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + QList *list = qlist_new(); + + qmp_output_add(qov, name, list); + qmp_output_push(qov, list); +} + +static GenericList *qmp_output_next_list(Visiter *v, GenericList **list, Error **errp) +{ + GenericList *retval = *list; + *list = retval->next; + return retval; +} + +static void qmp_output_end_list(Visiter *v, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_pop(qov); +} + +static void qmp_output_type_int(Visiter *v, int64_t *obj, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_add(qov, name, qint_from_int(*obj)); +} + +static void qmp_output_type_bool(Visiter *v, bool *obj, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_add(qov, name, qbool_from_int(*obj)); +} + +static void qmp_output_type_str(Visiter *v, char **obj, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_add(qov, name, qstring_from_str(*obj)); +} + +static void qmp_output_type_number(Visiter *v, double *obj, const char *name, Error **errp) +{ + QmpOutputVisiter *qov = to_qov(v); + qmp_output_add(qov, name, qfloat_from_double(*obj)); +} + +static void qmp_output_type_enum(Visiter *v, int *obj, const char *kind, const char *name, Error **errp) +{ + int64_t value = *obj; + qmp_output_type_int(v, &value, name, errp); +} + +QObject *qmp_output_get_qobject(QmpOutputVisiter *qov) +{ + return qmp_output_first(qov); +} + +Visiter *qmp_output_get_visiter(QmpOutputVisiter *v) +{ + return &v->visiter; +} + +QmpOutputVisiter *qmp_output_visiter_new(void) +{ + QmpOutputVisiter *v; + + v = qemu_mallocz(sizeof(*v)); + + v->visiter.start_struct = qmp_output_start_struct; + v->visiter.end_struct = qmp_output_end_struct; + v->visiter.start_list = qmp_output_start_list; + v->visiter.next_list = qmp_output_next_list; + v->visiter.end_list = qmp_output_end_list; + v->visiter.type_enum = qmp_output_type_enum; + v->visiter.type_int = qmp_output_type_int; + v->visiter.type_bool = qmp_output_type_bool; + v->visiter.type_str = qmp_output_type_str; + v->visiter.type_number = qmp_output_type_number; + + QTAILQ_INIT(&v->stack); + + return v; +} diff --git a/qapi/qmp-output-visiter.h b/qapi/qmp-output-visiter.h new file mode 100644 index 0000000..b04ab02 --- /dev/null +++ b/qapi/qmp-output-visiter.h @@ -0,0 +1,27 @@ +/* + * Output 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_OUTPUT_VISITER_H +#define QMP_OUTPUT_VISITER_H + +#include "qapi-visit-core.h" +#include "qobject.h" + +typedef struct QmpOutputVisiter QmpOutputVisiter; + +QmpOutputVisiter *qmp_output_visiter_new(void); + +QObject *qmp_output_get_qobject(QmpOutputVisiter *v); +Visiter *qmp_output_get_visiter(QmpOutputVisiter *v); + +#endif -- 1.7.0.4