3d3eacaecc
By moving the base fields to a QObjectBase_, QObject can be a type which also has a 'base' field. This allows writing a generic QOBJECT() macro that will work with any QObject type, including QObject itself. The container_of() macro ensures that the object to cast has a QObjectBase_ base field, giving some type safety guarantees. QObject must have no members but QObjectBase_ base, or else QOBJECT() breaks. QObjectBase_ is not a typedef and uses a trailing underscore to make it obvious it is not for normal use and to avoid potential abuse. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180419150145.24795-3-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*
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* QDict Module
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*
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* Copyright (C) 2009 Red Hat Inc.
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*
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* Authors:
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* Luiz Capitulino <lcapitulino@redhat.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*/
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#ifndef QDICT_H
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#define QDICT_H
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#include "qapi/qmp/qobject.h"
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#include "qemu/queue.h"
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#define QDICT_BUCKET_MAX 512
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typedef struct QDictEntry {
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char *key;
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QObject *value;
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QLIST_ENTRY(QDictEntry) next;
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} QDictEntry;
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struct QDict {
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struct QObjectBase_ base;
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size_t size;
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QLIST_HEAD(,QDictEntry) table[QDICT_BUCKET_MAX];
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};
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/* Object API */
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QDict *qdict_new(void);
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const char *qdict_entry_key(const QDictEntry *entry);
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QObject *qdict_entry_value(const QDictEntry *entry);
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size_t qdict_size(const QDict *qdict);
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void qdict_put_obj(QDict *qdict, const char *key, QObject *value);
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void qdict_del(QDict *qdict, const char *key);
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int qdict_haskey(const QDict *qdict, const char *key);
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QObject *qdict_get(const QDict *qdict, const char *key);
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bool qdict_is_equal(const QObject *x, const QObject *y);
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void qdict_iter(const QDict *qdict,
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void (*iter)(const char *key, QObject *obj, void *opaque),
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void *opaque);
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const QDictEntry *qdict_first(const QDict *qdict);
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const QDictEntry *qdict_next(const QDict *qdict, const QDictEntry *entry);
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void qdict_destroy_obj(QObject *obj);
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/* Helper to qdict_put_obj(), accepts any object */
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#define qdict_put(qdict, key, obj) \
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qdict_put_obj(qdict, key, QOBJECT(obj))
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void qdict_put_bool(QDict *qdict, const char *key, bool value);
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void qdict_put_int(QDict *qdict, const char *key, int64_t value);
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void qdict_put_null(QDict *qdict, const char *key);
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void qdict_put_str(QDict *qdict, const char *key, const char *value);
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double qdict_get_double(const QDict *qdict, const char *key);
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int64_t qdict_get_int(const QDict *qdict, const char *key);
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bool qdict_get_bool(const QDict *qdict, const char *key);
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QList *qdict_get_qlist(const QDict *qdict, const char *key);
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QDict *qdict_get_qdict(const QDict *qdict, const char *key);
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const char *qdict_get_str(const QDict *qdict, const char *key);
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int64_t qdict_get_try_int(const QDict *qdict, const char *key,
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int64_t def_value);
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bool qdict_get_try_bool(const QDict *qdict, const char *key, bool def_value);
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const char *qdict_get_try_str(const QDict *qdict, const char *key);
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void qdict_copy_default(QDict *dst, QDict *src, const char *key);
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void qdict_set_default_str(QDict *dst, const char *key, const char *val);
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QDict *qdict_clone_shallow(const QDict *src);
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void qdict_flatten(QDict *qdict);
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void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start);
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void qdict_array_split(QDict *src, QList **dst);
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int qdict_array_entries(QDict *src, const char *subqdict);
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QObject *qdict_crumple(const QDict *src, Error **errp);
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void qdict_join(QDict *dest, QDict *src, bool overwrite);
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typedef struct QDictRenames {
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const char *from;
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const char *to;
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} QDictRenames;
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bool qdict_rename_keys(QDict *qdict, const QDictRenames *renames, Error **errp);
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#endif /* QDICT_H */
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