source: roaraudio/libroar/vio_misc.c @ 6029:c25f9d9f78a6

Last change on this file since 6029:c25f9d9f78a6 was 6029:c25f9d9f78a6, checked in by phi, 10 years ago

some smaller improvements in error handling

File size: 5.8 KB
Line 
1//vio_misc.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2014
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  roar_err_set(ROAR_ERROR_NOSYS);
43  return -1;
44 }
45
46 return self->read(buf, count, vio, self);
47}
48
49static ssize_t roar_vio_misc_write   (struct roar_vio_calls * vio, void *buf, size_t count) {
50 struct roar_vio_misc * self = vio->inst;
51
52 if ( self->write == NULL ) {
53  roar_err_set(ROAR_ERROR_RO);
54  return -1;
55 }
56
57 return self->write(buf, count, vio, self);
58}
59
60static roar_off_t   roar_vio_misc_lseek   (struct roar_vio_calls * vio, roar_off_t offset, int whence) {
61 (void)vio, (void)offset, (void)whence;
62 return 0;
63}
64
65static int     roar_vio_misc_sync    (struct roar_vio_calls * vio) {
66 (void)vio;
67 return 0;
68}
69
70static int     roar_vio_misc_ctl     (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) {
71 struct roar_vio_misc * self;
72
73 if ( vio == NULL || cmd == -1 )
74  return -1;
75
76 self = vio->inst;
77
78 switch (cmd) {
79  case ROAR_VIO_CTL_GET_NAME:
80    if ( data == NULL ) {
81     roar_err_set(ROAR_ERROR_FAULT);
82     return -1;
83    }
84
85    *(const char**)data = self->name;
86    return 0;
87   break;
88  case ROAR_VIO_CTL_SET_NOSYNC:
89    vio->sync = NULL;
90    return 0;
91   break;
92  case ROAR_VIO_CTL_NONBLOCK:
93    if ( self->support_nonblocking )
94     return 0;
95
96    if ( *(int*)data == ROAR_SOCKET_BLOCK )
97     return 0;
98
99    roar_err_set(ROAR_ERROR_NOSYS);
100    return -1;
101   break;
102 }
103
104 roar_err_set(ROAR_ERROR_BADRQC);
105 return -1;
106}
107
108static int     roar_vio_misc_close   (struct roar_vio_calls * vio) {
109 (void)vio;
110 return 0;
111}
112
113int     roar_vio_open_misc    (struct roar_vio_calls * calls, const struct roar_vio_misc * callbacks) {
114 if ( calls == NULL || callbacks == NULL ) {
115  roar_err_set(ROAR_ERROR_FAULT);
116  return -1;
117 }
118
119 memset(calls, 0, sizeof(struct roar_vio_calls));
120 calls->flags    = ROAR_VIO_FLAGS_NONE;
121 calls->refc     = 1;
122 calls->read     = roar_vio_misc_read;
123 calls->write    = roar_vio_misc_write;
124 calls->lseek    = roar_vio_misc_lseek;
125 calls->sync     = roar_vio_misc_sync;
126 calls->ctl      = roar_vio_misc_ctl;
127 calls->close    = roar_vio_misc_close;
128 calls->inst     = (void*)callbacks;
129
130 return 0;
131}
132
133static ssize_t roar_vio_misc_op_return_len (void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
134 (void)buf, (void)vio, (void)callbacks;
135 return len;
136}
137
138static ssize_t roar_vio_misc_op_return_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
139 (void)buf, (void)len, (void)vio, (void)callbacks;
140 return 0;
141}
142
143static ssize_t roar_vio_misc_op_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
144 (void)vio, (void)callbacks;
145 memset(buf, 0, len);
146 return len;
147}
148
149static ssize_t roar_vio_misc_op_full(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks)
150{
151 (void)buf, (void)len, (void)vio, (void)callbacks;
152 roar_err_set(ROAR_ERROR_NOSPC);
153 return -1;
154}
155
156static ssize_t roar_vio_misc_op_random_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
157 (void)vio, (void)callbacks;
158
159 if ( roar_random_gen_nonce(buf, len) == -1 )
160  return -1;
161
162 return len;
163}
164
165static ssize_t roar_vio_misc_op_random_salt_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) {
166 (void)vio, (void)callbacks;
167
168 if ( roar_random_salt_nonce(buf, len) == -1 )
169  return -1;
170
171 return len;
172}
173
174static const struct roar_vio_misc libroar_vio_miscs[] = {
175 {.name = "null", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_return_len},
176 {.name = "full", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_full},
177 {.name = "zero", .support_nonblocking = 1, .read = roar_vio_misc_op_zero,        .write = roar_vio_misc_op_return_len},
178 {.name = "nrandom", .support_nonblocking = 1,
179  .read = roar_vio_misc_op_random_nonce, .write = roar_vio_misc_op_random_salt_nonce}
180};
181
182int     roar_vio_open_misc_by_name(struct roar_vio_calls * calls, const char * name) {
183 size_t i;
184
185 if ( calls == NULL || name == NULL ) {
186  roar_err_set(ROAR_ERROR_FAULT);
187  return -1;
188 }
189
190 for (i = 0; i < (sizeof(libroar_vio_miscs)/sizeof(*libroar_vio_miscs)); i++)
191  if ( !strcasecmp(name, libroar_vio_miscs[i].name) )
192   return roar_vio_open_misc(calls, &(libroar_vio_miscs[i]));
193
194 roar_err_set(ROAR_ERROR_NOENT);
195 return -1;
196}
197
198//ll
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