1 | //vio.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | * NOTE for everyone want's to change something and send patches: |
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24 | * read README and HACKING! There a addition information on |
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25 | * the license of this document you need to read before you send |
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26 | * any patches. |
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27 | * |
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28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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29 | * or libpulse*: |
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30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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31 | * and are therefore GPL. Because of this it may be illigal to use |
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32 | * them with any software that uses libesd, libartsc or libpulse*. |
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33 | */ |
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34 | |
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35 | #include "libroar.h" |
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36 | |
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37 | int roar_vio_init_calls (struct roar_vio_calls * calls) { |
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38 | if ( calls == NULL ) |
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39 | return -1; |
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40 | |
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41 | memset((void*)calls, 0, sizeof(struct roar_vio_calls)); |
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42 | |
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43 | /* |
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44 | calls->read = (ssize_t (*)(int fd, void *buf, size_t count, void * inst))read; |
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45 | calls->write = (ssize_t (*)(int fd, void *buf, size_t count, void * inst))write; |
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46 | calls->lseek = (off_t (*)(int fildes, off_t offset, int whence, void * inst))lseek; |
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47 | */ |
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48 | |
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49 | calls->read = roar_vio_basic_read; |
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50 | calls->write = roar_vio_basic_write; |
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51 | calls->lseek = roar_vio_basic_lseek; |
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52 | calls->nonblock = roar_vio_basic_nonblock; |
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53 | calls->sync = roar_vio_basic_sync; |
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54 | calls->close = roar_vio_basic_close; |
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55 | |
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56 | return 0; |
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57 | } |
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58 | |
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59 | int roar_vio_set_inst (struct roar_vio_calls * vio, void * inst) { |
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60 | if ( vio == NULL ) |
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61 | return -1; |
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62 | |
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63 | vio->inst = inst; |
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64 | |
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65 | return 0; |
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66 | } |
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67 | |
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68 | int roar_vio_set_fh (struct roar_vio_calls * vio, int fh) { |
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69 | return roar_vio_set_inst(vio, (void*)(ROAR_INSTINT)(fh + 1)); |
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70 | } |
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71 | |
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72 | int roar_vio_get_fh (struct roar_vio_calls * vio) { |
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73 | if ( vio == NULL ) |
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74 | return -1; |
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75 | |
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76 | return ((int)(ROAR_INSTINT)vio->inst) - 1; |
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77 | } |
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78 | |
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79 | |
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80 | ssize_t roar_vio_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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81 | if ( vio == NULL ) |
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82 | return -1; |
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83 | |
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84 | if ( vio->read == NULL ) |
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85 | return -1; |
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86 | |
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87 | return vio->read(vio, buf, count); |
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88 | } |
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89 | |
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90 | ssize_t roar_vio_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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91 | if ( vio == NULL ) |
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92 | return -1; |
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93 | |
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94 | if ( vio->write == NULL ) |
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95 | return -1; |
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96 | |
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97 | return vio->write(vio, buf, count); |
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98 | } |
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99 | |
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100 | off_t roar_vio_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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101 | if ( vio == NULL ) |
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102 | return -1; |
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103 | |
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104 | if ( vio->lseek == NULL ) |
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105 | return -1; |
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106 | |
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107 | return vio->lseek(vio, offset, whence); |
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108 | } |
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109 | |
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110 | int roar_vio_nonblock(struct roar_vio_calls * vio, int state) { |
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111 | if ( vio == NULL ) |
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112 | return -1; |
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113 | |
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114 | if ( vio->nonblock == NULL ) |
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115 | return -1; |
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116 | |
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117 | return vio->nonblock(vio, state); |
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118 | } |
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119 | |
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120 | int roar_vio_sync (struct roar_vio_calls * vio) { |
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121 | if ( vio == NULL ) |
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122 | return -1; |
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123 | |
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124 | if ( vio->sync == NULL ) |
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125 | return -1; |
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126 | |
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127 | return vio->sync(vio); |
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128 | } |
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129 | |
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130 | int roar_vio_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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131 | if ( vio == NULL ) |
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132 | return -1; |
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133 | |
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134 | if ( vio->ctl == NULL ) |
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135 | return -1; |
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136 | |
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137 | return vio->ctl(vio, cmd, data); |
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138 | } |
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139 | |
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140 | int roar_vio_close (struct roar_vio_calls * vio) { |
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141 | if ( vio == NULL ) |
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142 | return -1; |
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143 | |
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144 | if ( vio->sync == NULL ) |
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145 | return -1; |
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146 | |
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147 | return vio->close(vio); |
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148 | } |
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149 | |
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150 | // VIOs: |
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151 | |
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152 | // basic |
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153 | ssize_t roar_vio_basic_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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154 | return read(roar_vio_get_fh(vio), buf, count); |
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155 | } |
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156 | |
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157 | ssize_t roar_vio_basic_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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158 | return write(roar_vio_get_fh(vio), buf, count); |
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159 | } |
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160 | |
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161 | off_t roar_vio_basic_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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162 | return lseek(roar_vio_get_fh(vio), offset, whence); |
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163 | } |
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164 | |
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165 | int roar_vio_basic_nonblock(struct roar_vio_calls * vio, int state) { |
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166 | if ( roar_socket_nonblock(roar_vio_get_fh(vio), state) == -1 ) |
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167 | return -1; |
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168 | |
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169 | if ( state == ROAR_SOCKET_NONBLOCK ) |
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170 | return 0; |
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171 | |
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172 | roar_vio_sync(vio); |
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173 | |
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174 | return 0; |
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175 | } |
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176 | |
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177 | int roar_vio_basic_sync (struct roar_vio_calls * vio) { |
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178 | return ROAR_FDATASYNC(roar_vio_get_fh(vio)); |
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179 | } |
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180 | |
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181 | int roar_vio_basic_close (struct roar_vio_calls * vio) { |
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182 | return close(roar_vio_get_fh(vio)); |
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183 | } |
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184 | |
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185 | // null |
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186 | ssize_t roar_vio_null_rw (struct roar_vio_calls * vio, void *buf, size_t count) { |
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187 | if ( vio == NULL || buf == NULL ) |
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188 | return -1; |
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189 | |
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190 | return 0; |
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191 | } |
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192 | |
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193 | // pass |
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194 | int roar_vio_open_pass (struct roar_vio_calls * calls, struct roar_vio_calls * dst) { |
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195 | if ( calls == NULL ) |
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196 | return -1; |
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197 | |
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198 | memset((void*)calls, 0, sizeof(struct roar_vio_calls)); |
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199 | |
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200 | calls->read = roar_vio_pass_read; |
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201 | calls->write = roar_vio_pass_write; |
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202 | calls->lseek = roar_vio_pass_lseek; |
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203 | calls->nonblock = roar_vio_pass_nonblock; |
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204 | calls->sync = roar_vio_pass_sync; |
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205 | calls->close = roar_vio_pass_close; |
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206 | |
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207 | calls->inst = dst; |
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208 | |
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209 | return 0; |
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210 | } |
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211 | |
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212 | ssize_t roar_vio_pass_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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213 | return roar_vio_read((struct roar_vio_calls *) vio->inst, buf, count); |
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214 | } |
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215 | |
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216 | ssize_t roar_vio_pass_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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217 | return roar_vio_write((struct roar_vio_calls *) vio->inst, buf, count); |
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218 | } |
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219 | |
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220 | off_t roar_vio_pass_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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221 | return roar_vio_lseek((struct roar_vio_calls *) vio->inst, offset, whence); |
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222 | } |
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223 | |
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224 | int roar_vio_pass_nonblock(struct roar_vio_calls * vio, int state) { |
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225 | return roar_vio_nonblock((struct roar_vio_calls *) vio->inst, state); |
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226 | } |
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227 | |
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228 | int roar_vio_pass_sync (struct roar_vio_calls * vio) { |
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229 | return roar_vio_sync((struct roar_vio_calls *) vio->inst); |
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230 | } |
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231 | |
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232 | int roar_vio_pass_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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233 | return roar_vio_ctl((struct roar_vio_calls *) vio->inst, cmd, data); |
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234 | } |
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235 | |
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236 | int roar_vio_pass_close (struct roar_vio_calls * vio) { |
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237 | return roar_vio_close((struct roar_vio_calls *) vio->inst); |
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238 | } |
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239 | |
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240 | |
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241 | // re |
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242 | int roar_vio_open_re (struct roar_vio_calls * calls, struct roar_vio_calls * dst) { |
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243 | if ( roar_vio_open_pass(calls, dst) == -1 ) |
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244 | return -1; |
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245 | |
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246 | calls->read = roar_vio_re_read; |
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247 | calls->write = roar_vio_re_write; |
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248 | calls->lseek = roar_vio_re_lseek; |
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249 | |
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250 | return 0; |
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251 | } |
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252 | ssize_t roar_vio_re_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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253 | size_t len = 0; |
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254 | ssize_t r = -1; |
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255 | |
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256 | if ( vio == NULL ) |
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257 | return -1; |
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258 | |
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259 | if ( vio->inst == NULL ) |
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260 | return -1; |
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261 | |
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262 | errno = 0; |
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263 | |
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264 | while ( (r = roar_vio_read((struct roar_vio_calls *) vio->inst, buf, count)) > 0 ) { |
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265 | len += r; |
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266 | buf += r; |
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267 | count -= r; |
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268 | if ( count == 0 ) |
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269 | break; |
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270 | } |
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271 | |
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272 | if ( len == 0 && r == -1 ) |
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273 | return -1; |
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274 | |
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275 | return len; |
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276 | } |
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277 | |
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278 | ssize_t roar_vio_re_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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279 | size_t len = 0; |
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280 | ssize_t r = -1; |
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281 | |
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282 | if ( vio == NULL ) |
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283 | return -1; |
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284 | |
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285 | if ( vio->inst == NULL ) |
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286 | return -1; |
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287 | |
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288 | errno = 0; |
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289 | |
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290 | while ( (r = roar_vio_write((struct roar_vio_calls *) vio->inst, buf, count)) > 0 ) { |
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291 | len += r; |
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292 | buf += r; |
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293 | count -= r; |
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294 | if ( count == 0 ) |
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295 | break; |
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296 | } |
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297 | |
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298 | if ( len == 0 && r == -1 ) |
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299 | return -1; |
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300 | |
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301 | return len; |
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302 | } |
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303 | |
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304 | // TODO: we should do a some more intelgent thing here. |
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305 | off_t roar_vio_re_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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306 | return roar_vio_lseek((struct roar_vio_calls *) vio->inst, offset, whence); |
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307 | } |
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308 | |
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309 | |
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310 | //ll |
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