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
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ClientSubscribe.hxx"
#include "ClientIdle.hxx"
#include "ClientInternal.hxx"
extern "C" {
#include "idle.h"
}
#include <string.h>
G_GNUC_PURE
static GSList *
client_find_subscription(const Client *client, const char *channel)
{
for (GSList *i = client->subscriptions; i != NULL; i = g_slist_next(i))
if (strcmp((const char *)i->data, channel) == 0)
return i;
return NULL;
}
enum client_subscribe_result
client_subscribe(Client *client, const char *channel)
{
assert(client != NULL);
assert(channel != NULL);
if (!client_message_valid_channel_name(channel))
return CLIENT_SUBSCRIBE_INVALID;
if (client_find_subscription(client, channel) != NULL)
return CLIENT_SUBSCRIBE_ALREADY;
if (client->num_subscriptions >= CLIENT_MAX_SUBSCRIPTIONS)
return CLIENT_SUBSCRIBE_FULL;
client->subscriptions = g_slist_prepend(client->subscriptions,
g_strdup(channel));
++client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
return CLIENT_SUBSCRIBE_OK;
}
bool
client_unsubscribe(Client *client, const char *channel)
{
GSList *i = client_find_subscription(client, channel);
if (i == NULL)
return false;
assert(client->num_subscriptions > 0);
client->subscriptions = g_slist_remove(client->subscriptions, i->data);
--client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
assert((client->num_subscriptions == 0) ==
(client->subscriptions == NULL));
return true;
}
void
client_unsubscribe_all(Client *client)
{
for (GSList *i = client->subscriptions; i != NULL; i = g_slist_next(i))
g_free(i->data);
g_slist_free(client->subscriptions);
client->subscriptions = NULL;
client->num_subscriptions = 0;
}
bool
client_push_message(Client *client, const struct client_message *msg)
{
assert(client != NULL);
assert(msg != NULL);
assert(client_message_defined(msg));
if (client->num_messages >= CLIENT_MAX_MESSAGES ||
client_find_subscription(client, msg->channel) == NULL)
return false;
if (client->messages == NULL)
client_idle_add(client, IDLE_MESSAGE);
client->messages = g_slist_prepend(client->messages,
client_message_dup(msg));
++client->num_messages;
return true;
}
GSList *
client_read_messages(Client *client)
{
GSList *messages = g_slist_reverse(client->messages);
client->messages = NULL;
client->num_messages = 0;
return messages;
}
|
