source: roaraudio/libroar/vio_misc.c @ 5393:f50243718494

Last change on this file since 5393:f50243718494 was 5388:e5cc8e03a3e1, checked in by phi, 12 years ago

Added support for refcount based VIOs as well as dynamically allocated VIOs (non-stack or global VIOs) (Closes: #127)

File size: 5.5 KB
Line 
1//vio_misc.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#include "libroar.h"
37
38static ssize_t roar_vio_misc_read    (struct roar_vio_calls * vio, void *buf, size_t count) {
39 struct roar_vio_misc * self = vio->inst;
40
41 if ( self->read == NULL )
42  return -1;
43
44 return self->read(buf, count, vio, self);
45}
46
47static ssize_t roar_vio_misc_write   (struct roar_vio_calls * vio, void *buf, size_t count) {
48 struct roar_vio_misc * self = vio->inst;
49
50 if ( self->write == NULL )
51  return -1;
52
53 return self->write(buf, count, vio, self);
54}
55
56static roar_off_t   roar_vio_misc_lseek   (struct roar_vio_calls * vio, roar_off_t offset, int whence) {
57 (void)vio, (void)offset, (void)whence;
58 return 0;
59}
60
61static int     roar_vio_misc_sync    (struct roar_vio_calls * vio) {
62 (void)vio;
63 return 0;
64}
65
66static int     roar_vio_misc_ctl     (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) {
67 struct roar_vio_misc * self = vio->inst;
68
69 if ( vio == NULL || cmd == -1 )
70  return -1;
71
72 switch (cmd) {
73  case ROAR_VIO_CTL_GET_NAME:
74    if ( data == NULL )
75     return -1;
76
77    *(const char**)data = self->name;
78    return 0;
79   break;
80  case ROAR_VIO_CTL_SET_NOSYNC:
81    vio->sync = NULL;
82    return 0;
83   break;
84  case ROAR_VIO_CTL_NONBLOCK:
85    if ( self->support_nonblocking )
86     return 0;
87
88    if ( *(int*)data == ROAR_SOCKET_BLOCK )
89     return 0;
90
91    return -1;
92   break;
93 }
94
95 return -1;
96}
97
98static int     roar_vio_misc_close   (struct roar_vio_calls * vio) {
99 (void)vio;
100 return 0;
101}
102
103int     roar_vio_open_misc    (struct roar_vio_calls * calls, const struct roar_vio_misc * callbacks) {
104 if ( calls == NULL || callbacks == NULL )
105  return -1;
106
107 memset(calls, 0, sizeof(struct roar_vio_calls));
108 calls->flags    = ROAR_VIO_FLAGS_NONE;
109 calls->refc     = 1;
110 calls->read     = roar_vio_misc_read;
111 calls->write    = roar_vio_misc_write;
112 calls->lseek    = roar_vio_misc_lseek;
113 calls->sync     = roar_vio_misc_sync;
114 calls->ctl      = roar_vio_misc_ctl;
115 calls->close    = roar_vio_misc_close;
116 calls->inst     = (void*)callbacks;
117
118 return 0;
119}
120
121static ssize_t roar_vio_misc_op_return_len (void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
122 (void)buf, (void)vio, (void)callbacks;
123 return len;
124}
125
126static ssize_t roar_vio_misc_op_return_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
127 (void)buf, (void)len, (void)vio, (void)callbacks;
128 return 0;
129}
130
131static ssize_t roar_vio_misc_op_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
132 (void)vio, (void)callbacks;
133 memset(buf, 0, len);
134 return len;
135}
136
137static ssize_t roar_vio_misc_op_full(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks)
138{
139 (void)buf, (void)len, (void)vio, (void)callbacks;
140 roar_err_set(ROAR_ERROR_NOSPC);
141 return -1;
142}
143
144static ssize_t roar_vio_misc_op_random_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
145 (void)vio, (void)callbacks;
146
147 if ( roar_random_gen_nonce(buf, len) == -1 )
148  return -1;
149
150 return len;
151}
152
153static ssize_t roar_vio_misc_op_random_salt_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
154 (void)vio, (void)callbacks;
155
156 if ( roar_random_salt_nonce(buf, len) == -1 )
157  return -1;
158
159 return len;
160}
161
162static const struct roar_vio_misc libroar_vio_miscs[] = {
163 {.name = "null", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_return_len},
164 {.name = "full", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_full},
165 {.name = "zero", .support_nonblocking = 1, .read = roar_vio_misc_op_zero,        .write = roar_vio_misc_op_return_len},
166 {.name = "nrandom", .support_nonblocking = 1,
167  .read = roar_vio_misc_op_random_nonce, .write = roar_vio_misc_op_random_salt_nonce}
168};
169
170int     roar_vio_open_misc_by_name(struct roar_vio_calls * calls, const char * name) {
171 size_t i;
172
173 if ( calls == NULL || name == NULL )
174  return -1;
175
176 for (i = 0; i < (sizeof(libroar_vio_miscs)/sizeof(*libroar_vio_miscs)); i++)
177  if ( !strcasecmp(name, libroar_vio_miscs[i].name) )
178   return roar_vio_open_misc(calls, &(libroar_vio_miscs[i]));
179
180 return -1;
181}
182
183//ll
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