summaryrefslogtreecommitdiff
path: root/gee/bidiriterator.c
blob: ae37adfc6d8267c7b2f9d9a0b9248a163cb462e3 (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
/* bidiriterator.c generated by valac 0.18.0, the Vala compiler
 * generated from bidiriterator.vala, do not modify */

/* bidiriterator.vala
 *
 * Copyright (C) 2009  Didier Villevalois, Maciej Piechotka
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 *
 * Author:
 * 	Maciej Piechotka <uzytkownik2@gmail.com>
 */

#include <glib.h>
#include <glib-object.h>


#define GEE_TYPE_ITERATOR (gee_iterator_get_type ())
#define GEE_ITERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEE_TYPE_ITERATOR, GeeIterator))
#define GEE_IS_ITERATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GEE_TYPE_ITERATOR))
#define GEE_ITERATOR_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GEE_TYPE_ITERATOR, GeeIteratorIface))

typedef struct _GeeIterator GeeIterator;
typedef struct _GeeIteratorIface GeeIteratorIface;

#define GEE_TYPE_BIDIR_ITERATOR (gee_bidir_iterator_get_type ())
#define GEE_BIDIR_ITERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEE_TYPE_BIDIR_ITERATOR, GeeBidirIterator))
#define GEE_IS_BIDIR_ITERATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GEE_TYPE_BIDIR_ITERATOR))
#define GEE_BIDIR_ITERATOR_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GEE_TYPE_BIDIR_ITERATOR, GeeBidirIteratorIface))

typedef struct _GeeBidirIterator GeeBidirIterator;
typedef struct _GeeBidirIteratorIface GeeBidirIteratorIface;

struct _GeeIteratorIface {
	GTypeInterface parent_iface;
	gboolean (*next) (GeeIterator* self);
	gboolean (*has_next) (GeeIterator* self);
	gboolean (*first) (GeeIterator* self);
	gpointer (*get) (GeeIterator* self);
	void (*remove) (GeeIterator* self);
};

struct _GeeBidirIteratorIface {
	GTypeInterface parent_iface;
	gboolean (*previous) (GeeBidirIterator* self);
	gboolean (*has_previous) (GeeBidirIterator* self);
	gboolean (*last) (GeeBidirIterator* self);
};



GType gee_iterator_get_type (void) G_GNUC_CONST;
GType gee_bidir_iterator_get_type (void) G_GNUC_CONST;
gboolean gee_bidir_iterator_previous (GeeBidirIterator* self);
gboolean gee_bidir_iterator_has_previous (GeeBidirIterator* self);
gboolean gee_bidir_iterator_last (GeeBidirIterator* self);


/**
 * Rewinds to the previous element in the iteration.
 *
 * @return ``true`` if the iterator has a previous element
 */
gboolean gee_bidir_iterator_previous (GeeBidirIterator* self) {
	g_return_val_if_fail (self != NULL, FALSE);
	return GEE_BIDIR_ITERATOR_GET_INTERFACE (self)->previous (self);
}


/**
 * Checks whether there is a previous element in the iteration.
 *
 * @return ``true`` if the iterator has a previous element
 */
gboolean gee_bidir_iterator_has_previous (GeeBidirIterator* self) {
	g_return_val_if_fail (self != NULL, FALSE);
	return GEE_BIDIR_ITERATOR_GET_INTERFACE (self)->has_previous (self);
}


/**
 * Advances to the last element in the iteration.
 *
 * @return ``true`` if the iterator has a last element
 */
gboolean gee_bidir_iterator_last (GeeBidirIterator* self) {
	g_return_val_if_fail (self != NULL, FALSE);
	return GEE_BIDIR_ITERATOR_GET_INTERFACE (self)->last (self);
}


static void gee_bidir_iterator_base_init (GeeBidirIteratorIface * iface) {
	static gboolean initialized = FALSE;
	if (!initialized) {
		initialized = TRUE;
	}
}


/**
 * A bi-directional iterator.
 */
GType gee_bidir_iterator_get_type (void) {
	static volatile gsize gee_bidir_iterator_type_id__volatile = 0;
	if (g_once_init_enter (&gee_bidir_iterator_type_id__volatile)) {
		static const GTypeInfo g_define_type_info = { sizeof (GeeBidirIteratorIface), (GBaseInitFunc) gee_bidir_iterator_base_init, (GBaseFinalizeFunc) NULL, (GClassInitFunc) NULL, (GClassFinalizeFunc) NULL, NULL, 0, 0, (GInstanceInitFunc) NULL, NULL };
		GType gee_bidir_iterator_type_id;
		gee_bidir_iterator_type_id = g_type_register_static (G_TYPE_INTERFACE, "GeeBidirIterator", &g_define_type_info, 0);
		g_type_interface_add_prerequisite (gee_bidir_iterator_type_id, GEE_TYPE_ITERATOR);
		g_once_init_leave (&gee_bidir_iterator_type_id__volatile, gee_bidir_iterator_type_id);
	}
	return gee_bidir_iterator_type_id__volatile;
}