summaryrefslogtreecommitdiff
path: root/qobject/qlist.c
blob: 60562a1f52690a1c12056089c71a92ec74772c95 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/*
 * QList Module
 *
 * Copyright (C) 2009 Red Hat Inc.
 *
 * Authors:
 *  Luiz Capitulino <lcapitulino@redhat.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 "qemu/osdep.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qlist.h"
#include "qapi/qmp/qnull.h"
#include "qapi/qmp/qnum.h"
#include "qapi/qmp/qstring.h"
#include "qemu/queue.h"
#include "qobject-internal.h"

/**
 * qlist_new(): Create a new QList
 *
 * Return strong reference.
 */
QList *qlist_new(void)
{
    QList *qlist;

    qlist = g_malloc(sizeof(*qlist));
    qobject_init(QOBJECT(qlist), QTYPE_QLIST);
    QTAILQ_INIT(&qlist->head);

    return qlist;
}

QList *qlist_copy(QList *src)
{
    QList *dst = qlist_new();
    QListEntry *entry;
    QObject *elt;

    QLIST_FOREACH_ENTRY(src, entry) {
        elt = qlist_entry_obj(entry);
        qobject_ref(elt);
        qlist_append_obj(dst, elt);
    }
    return dst;
}

/**
 * qlist_append_obj(): Append an QObject into QList
 *
 * NOTE: ownership of 'value' is transferred to the QList
 */
void qlist_append_obj(QList *qlist, QObject *value)
{
    QListEntry *entry;

    entry = g_malloc(sizeof(*entry));
    entry->value = value;

    QTAILQ_INSERT_TAIL(&qlist->head, entry, next);
}

void qlist_append_int(QList *qlist, int64_t value)
{
    qlist_append(qlist, qnum_from_int(value));
}

void qlist_append_bool(QList *qlist, bool value)
{
    qlist_append(qlist, qbool_from_bool(value));
}

void qlist_append_str(QList *qlist, const char *value)
{
    qlist_append(qlist, qstring_from_str(value));
}

void qlist_append_null(QList *qlist)
{
    qlist_append(qlist, qnull());
}

QObject *qlist_pop(QList *qlist)
{
    QListEntry *entry;
    QObject *ret;

    if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) {
        return NULL;
    }

    entry = QTAILQ_FIRST(&qlist->head);
    QTAILQ_REMOVE(&qlist->head, entry, next);

    ret = entry->value;
    g_free(entry);

    return ret;
}

QObject *qlist_peek(QList *qlist)
{
    QListEntry *entry;

    if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) {
        return NULL;
    }

    entry = QTAILQ_FIRST(&qlist->head);

    return entry->value;
}

int qlist_empty(const QList *qlist)
{
    return QTAILQ_EMPTY(&qlist->head);
}

size_t qlist_size(const QList *qlist)
{
    size_t count = 0;
    QListEntry *entry;

    QLIST_FOREACH_ENTRY(qlist, entry) {
        count++;
    }
    return count;
}

/**
 * qlist_is_equal(): Test whether the two QLists are equal
 *
 * In order to be considered equal, the respective two objects at each
 * index of the two lists have to compare equal (regarding
 * qobject_is_equal()), and both lists have to have the same number of
 * elements.
 * That means both lists have to contain equal objects in equal order.
 */
bool qlist_is_equal(const QObject *x, const QObject *y)
{
    const QList *list_x = qobject_to(QList, x);
    const QList *list_y = qobject_to(QList, y);
    const QListEntry *entry_x, *entry_y;

    entry_x = qlist_first(list_x);
    entry_y = qlist_first(list_y);

    while (entry_x && entry_y) {
        if (!qobject_is_equal(qlist_entry_obj(entry_x),
                              qlist_entry_obj(entry_y)))
        {
            return false;
        }

        entry_x = qlist_next(entry_x);
        entry_y = qlist_next(entry_y);
    }

    return !entry_x && !entry_y;
}

/**
 * qlist_destroy_obj(): Free all the memory allocated by a QList
 */
void qlist_destroy_obj(QObject *obj)
{
    QList *qlist;
    QListEntry *entry, *next_entry;

    assert(obj != NULL);
    qlist = qobject_to(QList, obj);

    QTAILQ_FOREACH_SAFE(entry, &qlist->head, next, next_entry) {
        QTAILQ_REMOVE(&qlist->head, entry, next);
        qobject_unref(entry->value);
        g_free(entry);
    }

    g_free(qlist);
}