1 | //vio_misc.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | static ssize_t roar_vio_misc_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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39 | struct roar_vio_misc * self = vio->inst; |
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40 | |
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41 | if ( self->read == NULL ) |
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42 | return -1; |
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43 | |
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44 | return self->read(buf, count, vio, self); |
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45 | } |
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46 | |
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47 | static ssize_t roar_vio_misc_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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48 | struct roar_vio_misc * self = vio->inst; |
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49 | |
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50 | if ( self->write == NULL ) |
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51 | return -1; |
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52 | |
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53 | return self->write(buf, count, vio, self); |
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54 | } |
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55 | |
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56 | static roar_off_t roar_vio_misc_lseek (struct roar_vio_calls * vio, roar_off_t offset, int whence) { |
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57 | (void)vio, (void)offset, (void)whence; |
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58 | return 0; |
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59 | } |
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60 | |
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61 | static int roar_vio_misc_sync (struct roar_vio_calls * vio) { |
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62 | (void)vio; |
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63 | return 0; |
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64 | } |
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65 | |
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66 | static int roar_vio_misc_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) { |
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67 | struct roar_vio_misc * self; |
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68 | |
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69 | if ( vio == NULL || cmd == -1 ) |
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70 | return -1; |
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71 | |
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72 | self = vio->inst; |
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73 | |
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74 | switch (cmd) { |
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75 | case ROAR_VIO_CTL_GET_NAME: |
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76 | if ( data == NULL ) |
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77 | return -1; |
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78 | |
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79 | *(const char**)data = self->name; |
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80 | return 0; |
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81 | break; |
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82 | case ROAR_VIO_CTL_SET_NOSYNC: |
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83 | vio->sync = NULL; |
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84 | return 0; |
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85 | break; |
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86 | case ROAR_VIO_CTL_NONBLOCK: |
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87 | if ( self->support_nonblocking ) |
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88 | return 0; |
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89 | |
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90 | if ( *(int*)data == ROAR_SOCKET_BLOCK ) |
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91 | return 0; |
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92 | |
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93 | return -1; |
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94 | break; |
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95 | } |
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96 | |
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97 | return -1; |
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98 | } |
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99 | |
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100 | static int roar_vio_misc_close (struct roar_vio_calls * vio) { |
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101 | (void)vio; |
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102 | return 0; |
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103 | } |
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104 | |
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105 | int roar_vio_open_misc (struct roar_vio_calls * calls, const struct roar_vio_misc * callbacks) { |
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106 | if ( calls == NULL || callbacks == NULL ) |
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107 | return -1; |
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108 | |
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109 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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110 | calls->flags = ROAR_VIO_FLAGS_NONE; |
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111 | calls->refc = 1; |
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112 | calls->read = roar_vio_misc_read; |
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113 | calls->write = roar_vio_misc_write; |
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114 | calls->lseek = roar_vio_misc_lseek; |
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115 | calls->sync = roar_vio_misc_sync; |
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116 | calls->ctl = roar_vio_misc_ctl; |
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117 | calls->close = roar_vio_misc_close; |
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118 | calls->inst = (void*)callbacks; |
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119 | |
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120 | return 0; |
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121 | } |
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122 | |
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123 | static ssize_t roar_vio_misc_op_return_len (void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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124 | (void)buf, (void)vio, (void)callbacks; |
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125 | return len; |
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126 | } |
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127 | |
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128 | static ssize_t roar_vio_misc_op_return_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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129 | (void)buf, (void)len, (void)vio, (void)callbacks; |
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130 | return 0; |
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131 | } |
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132 | |
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133 | static ssize_t roar_vio_misc_op_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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134 | (void)vio, (void)callbacks; |
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135 | memset(buf, 0, len); |
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136 | return len; |
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137 | } |
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138 | |
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139 | static ssize_t roar_vio_misc_op_full(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) |
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140 | { |
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141 | (void)buf, (void)len, (void)vio, (void)callbacks; |
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142 | roar_err_set(ROAR_ERROR_NOSPC); |
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143 | return -1; |
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144 | } |
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145 | |
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146 | static ssize_t roar_vio_misc_op_random_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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147 | (void)vio, (void)callbacks; |
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148 | |
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149 | if ( roar_random_gen_nonce(buf, len) == -1 ) |
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150 | return -1; |
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151 | |
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152 | return len; |
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153 | } |
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154 | |
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155 | static ssize_t roar_vio_misc_op_random_salt_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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156 | (void)vio, (void)callbacks; |
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157 | |
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158 | if ( roar_random_salt_nonce(buf, len) == -1 ) |
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159 | return -1; |
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160 | |
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161 | return len; |
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162 | } |
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163 | |
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164 | static const struct roar_vio_misc libroar_vio_miscs[] = { |
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165 | {.name = "null", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_return_len}, |
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166 | {.name = "full", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_full}, |
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167 | {.name = "zero", .support_nonblocking = 1, .read = roar_vio_misc_op_zero, .write = roar_vio_misc_op_return_len}, |
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168 | {.name = "nrandom", .support_nonblocking = 1, |
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169 | .read = roar_vio_misc_op_random_nonce, .write = roar_vio_misc_op_random_salt_nonce} |
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170 | }; |
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171 | |
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172 | int roar_vio_open_misc_by_name(struct roar_vio_calls * calls, const char * name) { |
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173 | size_t i; |
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174 | |
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175 | if ( calls == NULL || name == NULL ) |
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176 | return -1; |
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177 | |
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178 | for (i = 0; i < (sizeof(libroar_vio_miscs)/sizeof(*libroar_vio_miscs)); i++) |
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179 | if ( !strcasecmp(name, libroar_vio_miscs[i].name) ) |
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180 | return roar_vio_open_misc(calls, &(libroar_vio_miscs[i])); |
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181 | |
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182 | return -1; |
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183 | } |
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184 | |
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185 | //ll |
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