1 | //vio_stack.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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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_open_stack (struct roar_vio_calls * calls) { |
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38 | struct roar_vio_stack * self; |
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39 | |
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40 | if ( calls == NULL ) |
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41 | return -1; |
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42 | |
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43 | if ( (self = malloc(sizeof(struct roar_vio_stack))) == NULL ) |
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44 | return -1; |
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45 | |
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46 | memset(self, 0, sizeof(struct roar_vio_stack)); |
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47 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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48 | |
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49 | calls->inst = self; |
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50 | calls->close = roar_vio_stack_close; |
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51 | calls->ctl = roar_vio_stack_ctl; |
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52 | calls->read = roar_vio_stack_read; |
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53 | calls->write = roar_vio_stack_write; |
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54 | calls->lseek = roar_vio_stack_lseek; |
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55 | calls->nonblock = roar_vio_stack_nonblock; |
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56 | calls->sync = roar_vio_stack_sync; |
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57 | |
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58 | return 0; |
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59 | } |
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60 | |
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61 | int roar_vio_stack_add (struct roar_vio_calls * calls, struct roar_vio_calls * vio) { |
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62 | struct roar_vio_stack * self; |
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63 | |
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64 | if ( calls == NULL || vio == NULL ) |
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65 | return -1; |
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66 | |
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67 | if ( (self = calls->inst) == NULL ) |
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68 | return -1; |
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69 | |
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70 | if ( self->next == ROAR_VIO_STACK_MAX ) |
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71 | return -1; |
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72 | |
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73 | self->cur = self->calls[self->next++] = vio; |
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74 | |
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75 | return 0; |
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76 | } |
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77 | |
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78 | int roar_vio_stack_close (struct roar_vio_calls * vio) { |
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79 | struct roar_vio_stack * self; |
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80 | int i; |
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81 | |
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82 | if ( vio == NULL ) |
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83 | return -1; |
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84 | |
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85 | if ( (self = vio->inst) == NULL ) |
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86 | return -1; |
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87 | |
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88 | if ( self->cur != NULL ) { |
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89 | if ( roar_vio_close(self->cur) == -1 ) |
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90 | return -1; |
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91 | |
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92 | for (i = 0; i < self->next; i++) |
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93 | free(self->calls[i]); |
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94 | } |
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95 | |
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96 | free(self); |
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97 | |
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98 | return 0; |
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99 | } |
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100 | |
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101 | int roar_vio_stack_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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102 | if (vio == NULL || cmd == -1) |
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103 | return -1; |
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104 | |
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105 | switch (cmd) { |
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106 | case ROAR_VIO_CTL_GET_FH: |
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107 | case ROAR_VIO_CTL_GET_READ_FH: |
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108 | case ROAR_VIO_CTL_GET_WRITE_FH: |
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109 | case ROAR_VIO_CTL_SELECT: |
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110 | return roar_vio_ctl(((struct roar_vio_stack*)(vio->inst))->cur, cmd, data); |
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111 | break; |
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112 | } |
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113 | |
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114 | return -1; |
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115 | } |
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116 | |
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117 | |
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118 | ssize_t roar_vio_stack_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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119 | if ( vio == NULL ) |
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120 | return -1; |
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121 | |
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122 | if ( vio->inst == NULL ) |
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123 | return -1; |
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124 | |
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125 | if ( ((struct roar_vio_stack*)(vio->inst))->cur == NULL ) |
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126 | return -1; |
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127 | |
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128 | return roar_vio_read(((struct roar_vio_stack*)(vio->inst))->cur, buf, count); |
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129 | } |
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130 | |
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131 | ssize_t roar_vio_stack_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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132 | if ( vio == NULL ) |
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133 | return -1; |
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134 | |
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135 | if ( vio->inst == NULL ) |
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136 | return -1; |
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137 | |
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138 | if ( ((struct roar_vio_stack*)(vio->inst))->cur == NULL ) |
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139 | return -1; |
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140 | |
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141 | return roar_vio_write(((struct roar_vio_stack*)(vio->inst))->cur, buf, count); |
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142 | } |
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143 | |
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144 | off_t roar_vio_stack_lseek (struct roar_vio_calls * vio, off_t offset, int whence) { |
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145 | if ( vio == NULL ) |
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146 | return -1; |
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147 | |
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148 | if ( vio->inst == NULL ) |
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149 | return -1; |
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150 | |
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151 | if ( ((struct roar_vio_stack*)(vio->inst))->cur == NULL ) |
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152 | return -1; |
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153 | |
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154 | return roar_vio_lseek(((struct roar_vio_stack*)(vio->inst))->cur, offset, whence); |
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155 | } |
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156 | |
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157 | int roar_vio_stack_nonblock(struct roar_vio_calls * vio, int state) { |
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158 | if ( vio == NULL ) |
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159 | return -1; |
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160 | |
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161 | if ( vio->inst == NULL ) |
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162 | return -1; |
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163 | |
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164 | if ( ((struct roar_vio_stack*)(vio->inst))->cur == NULL ) |
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165 | return -1; |
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166 | |
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167 | return roar_vio_nonblock(((struct roar_vio_stack*)(vio->inst))->cur, state); |
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168 | } |
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169 | |
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170 | int roar_vio_stack_sync (struct roar_vio_calls * vio) { |
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171 | if ( vio == NULL ) |
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172 | return -1; |
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173 | |
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174 | if ( vio->inst == NULL ) |
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175 | return -1; |
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176 | |
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177 | if ( ((struct roar_vio_stack*)(vio->inst))->cur == NULL ) |
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178 | return -1; |
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179 | |
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180 | return roar_vio_sync(((struct roar_vio_stack*)(vio->inst))->cur); |
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181 | } |
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182 | |
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183 | //ll |
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