1 /***
2 This file is part of PulseAudio.
3
4 Copyright 2004-2006 Lennart Poettering
5
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
10
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <stdlib.h>
25 #include <string.h>
26 #include <string.h>
27 #include <stdio.h>
28
29 #include <pulse/xmalloc.h>
30
31 #include <pulsecore/source.h>
32 #include <pulsecore/sink.h>
33 #include <pulsecore/core-subscribe.h>
34 #include <pulsecore/core-util.h>
35 #include <pulsecore/macro.h>
36
37 #include "namereg.h"
38
39 struct namereg_entry {
40 pa_namereg_type_t type;
41 char *name;
42 void *data;
43 };
44
is_valid_char(char c)45 static bool is_valid_char(char c) {
46 return
47 (c >= 'a' && c <= 'z') ||
48 (c >= 'A' && c <= 'Z') ||
49 (c >= '0' && c <= '9') ||
50 c == '.' ||
51 c == '-' ||
52 c == '_';
53 }
54
pa_namereg_is_valid_name(const char * name)55 bool pa_namereg_is_valid_name(const char *name) {
56 const char *c;
57
58 pa_assert(name);
59
60 if (*name == 0)
61 return false;
62
63 for (c = name; *c && (c-name < PA_NAME_MAX); c++)
64 if (!is_valid_char(*c))
65 return false;
66
67 if (*c)
68 return false;
69
70 return true;
71 }
72
pa_namereg_is_valid_name_or_wildcard(const char * name,pa_namereg_type_t type)73 bool pa_namereg_is_valid_name_or_wildcard(const char *name, pa_namereg_type_t type) {
74
75 pa_assert(name);
76
77 if (pa_namereg_is_valid_name(name))
78 return true;
79
80 if (type == PA_NAMEREG_SINK &&
81 pa_streq(name, "@DEFAULT_SINK@"))
82 return true;
83
84 if (type == PA_NAMEREG_SOURCE &&
85 (pa_streq(name, "@DEFAULT_SOURCE@") ||
86 pa_streq(name, "@DEFAULT_MONITOR@")))
87 return true;
88
89 return false;
90 }
91
pa_namereg_make_valid_name(const char * name)92 char* pa_namereg_make_valid_name(const char *name) {
93 const char *a;
94 char *b, *n;
95
96 if (*name == 0)
97 return NULL;
98
99 n = pa_xnew(char, strlen(name)+1);
100
101 for (a = name, b = n; *a && (a-name < PA_NAME_MAX); a++, b++)
102 *b = (char) (is_valid_char(*a) ? *a : '_');
103
104 *b = 0;
105
106 return n;
107 }
108
pa_namereg_register(pa_core * c,const char * name,pa_namereg_type_t type,void * data,bool fail)109 const char *pa_namereg_register(pa_core *c, const char *name, pa_namereg_type_t type, void *data, bool fail) {
110 struct namereg_entry *e;
111 char *n = NULL;
112
113 pa_assert(c);
114 pa_assert(name);
115 pa_assert(data);
116
117 if (!*name)
118 return NULL;
119
120 if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE || type == PA_NAMEREG_CARD) &&
121 !pa_namereg_is_valid_name(name)) {
122
123 if (fail)
124 return NULL;
125
126 if (!(name = n = pa_namereg_make_valid_name(name)))
127 return NULL;
128 }
129
130 if ((e = pa_hashmap_get(c->namereg, name)) && fail) {
131 pa_xfree(n);
132 return NULL;
133 }
134
135 if (e) {
136 unsigned i;
137 size_t l = strlen(name);
138 char *k;
139
140 if (l+4 > PA_NAME_MAX) {
141 pa_xfree(n);
142 return NULL;
143 }
144
145 k = pa_xmalloc(l+4);
146
147 for (i = 2; i <= 99; i++) {
148 pa_snprintf(k, l+4, "%s.%u", name, i);
149
150 if (!(e = pa_hashmap_get(c->namereg, k)))
151 break;
152 }
153
154 if (e) {
155 pa_xfree(n);
156 pa_xfree(k);
157 return NULL;
158 }
159
160 pa_xfree(n);
161 n = k;
162 }
163
164 e = pa_xnew(struct namereg_entry, 1);
165 e->type = type;
166 e->name = n ? n : pa_xstrdup(name);
167 e->data = data;
168
169 pa_assert_se(pa_hashmap_put(c->namereg, e->name, e) >= 0);
170
171 return e->name;
172 }
173
pa_namereg_unregister(pa_core * c,const char * name)174 void pa_namereg_unregister(pa_core *c, const char *name) {
175 struct namereg_entry *e;
176
177 pa_assert(c);
178 pa_assert(name);
179
180 pa_assert_se(e = pa_hashmap_remove(c->namereg, name));
181 pa_xfree(e->name);
182 pa_xfree(e);
183 }
184
pa_namereg_get(pa_core * c,const char * name,pa_namereg_type_t type)185 void* pa_namereg_get(pa_core *c, const char *name, pa_namereg_type_t type) {
186 struct namereg_entry *e;
187 uint32_t idx;
188 pa_assert(c);
189
190 if (type == PA_NAMEREG_SOURCE && (!name || pa_streq(name, "@DEFAULT_SOURCE@"))) {
191 return c->default_source;
192
193 } else if (type == PA_NAMEREG_SINK && (!name || pa_streq(name, "@DEFAULT_SINK@"))) {
194 return c->default_sink;
195
196 } else if (type == PA_NAMEREG_SOURCE && name && pa_streq(name, "@DEFAULT_MONITOR@")) {
197 if (c->default_sink)
198 return c->default_sink->monitor_source;
199 else
200 return NULL;
201 }
202
203 if (!name)
204 return NULL;
205
206 if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE || type == PA_NAMEREG_CARD) &&
207 !pa_namereg_is_valid_name(name))
208 return NULL;
209
210 if ((e = pa_hashmap_get(c->namereg, name)))
211 if (e->type == type)
212 return e->data;
213
214 if (pa_atou(name, &idx) < 0)
215 return NULL;
216
217 if (type == PA_NAMEREG_SINK)
218 return pa_idxset_get_by_index(c->sinks, idx);
219 else if (type == PA_NAMEREG_SOURCE)
220 return pa_idxset_get_by_index(c->sources, idx);
221 else if (type == PA_NAMEREG_SAMPLE && c->scache)
222 return pa_idxset_get_by_index(c->scache, idx);
223 else if (type == PA_NAMEREG_CARD)
224 return pa_idxset_get_by_index(c->cards, idx);
225
226 return NULL;
227 }
228