1 | //buffer.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_buffer_new (struct roar_buffer ** buf, size_t len) { |
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38 | void * data; |
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39 | |
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40 | if ((data = malloc(len)) == NULL) { |
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41 | return -1; |
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42 | } |
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43 | |
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44 | if ( roar_buffer_new_no_ma(buf, len, data) == -1 ) { |
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45 | free(data); |
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46 | return -1; |
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47 | } |
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48 | |
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49 | if ( roar_buffer_set_flag(*buf, ROAR_BUFFER_FLAG_NOFREE, ROAR_BUFFER_RESET) == -1 ) { |
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50 | roar_buffer_free(*buf); |
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51 | free(data); |
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52 | return -1; |
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53 | } |
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54 | |
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55 | return 0; |
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56 | } |
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57 | |
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58 | int roar_buffer_new_no_ma(struct roar_buffer ** buf, size_t len, void * data) { // no internal malloc |
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59 | struct roar_buffer * new; |
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60 | |
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61 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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62 | |
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63 | if ( buf == NULL || data == NULL ) |
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64 | return -1; |
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65 | |
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66 | if ((new = malloc(sizeof(struct roar_buffer))) == NULL) { |
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67 | *buf = NULL; |
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68 | return -1; |
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69 | } |
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70 | |
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71 | new->data = data; |
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72 | |
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73 | new->flags = ROAR_BUFFER_FLAG_NONE|ROAR_BUFFER_FLAG_NOFREE; |
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74 | |
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75 | new->user_data = new->data; |
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76 | |
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77 | new->next = NULL; |
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78 | |
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79 | new->len = len; |
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80 | new->user_len = len; |
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81 | *buf = new; |
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82 | |
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83 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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84 | |
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85 | return 0; |
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86 | } |
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87 | |
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88 | int roar_buffer_free (struct roar_buffer * buf) { |
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89 | struct roar_buffer * next; |
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90 | |
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91 | if ( buf == NULL ) |
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92 | return -1; |
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93 | |
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94 | while ((next = buf->next)) { |
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95 | free(buf->data); |
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96 | free(buf); |
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97 | buf = next; |
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98 | } |
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99 | |
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100 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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101 | free(buf->data); |
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102 | |
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103 | free(buf); |
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104 | |
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105 | return 0; |
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106 | } |
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107 | |
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108 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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109 | if ( buf == NULL ) { |
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110 | if ( next != NULL ) |
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111 | *next = NULL; |
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112 | return -1; |
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113 | } |
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114 | |
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115 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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116 | |
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117 | if ( next != NULL ) |
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118 | *next = buf->next; |
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119 | |
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120 | free(buf->data); |
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121 | free(buf); |
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122 | |
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123 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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124 | return 0; |
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125 | } |
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126 | |
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127 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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128 | if ( buf == NULL ) |
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129 | return -1; |
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130 | |
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131 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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132 | |
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133 | while ( buf->next != NULL ) { |
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134 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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135 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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136 | buf = buf->next; |
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137 | } |
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138 | |
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139 | buf->next = next; |
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140 | |
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141 | return 0; |
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142 | } |
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143 | |
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144 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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145 | if ( buf == NULL ) |
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146 | return -1; |
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147 | |
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148 | *next = buf->next; |
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149 | |
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150 | return 0; |
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151 | } |
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152 | |
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153 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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154 | if ( buf == NULL ) |
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155 | return -1; |
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156 | |
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157 | *data = buf->user_data; |
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158 | |
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159 | return 0; |
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160 | } |
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161 | |
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162 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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163 | if ( buf == NULL ) |
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164 | return -1; |
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165 | |
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166 | buf->user_len -= off; |
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167 | buf->user_data += off; |
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168 | |
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169 | return 0; |
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170 | } |
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171 | |
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172 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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173 | size_t todo, cl; |
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174 | struct roar_buffer * cur; |
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175 | void * cd; |
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176 | |
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177 | if ( len == NULL || buf == NULL || data == NULL ) { |
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178 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid input", buf, data, (unsigned long)len); |
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179 | return -1; |
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180 | } |
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181 | |
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182 | if ( *buf == NULL ) { |
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183 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid pointer to buffer ring", buf, data, (unsigned long)len); |
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184 | return -1; |
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185 | } |
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186 | |
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187 | todo = *len; |
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188 | cur = *buf; |
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189 | |
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190 | *len = 0; |
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191 | |
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192 | while (todo) { |
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193 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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194 | |
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195 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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196 | return -1; |
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197 | |
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198 | if ( cl > todo ) { |
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199 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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200 | return -1; |
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201 | |
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202 | cl = todo; |
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203 | |
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204 | memcpy(data, cd, cl); |
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205 | todo -= cl; |
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206 | data += cl; |
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207 | *len += cl; |
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208 | |
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209 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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210 | return -1; |
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211 | } else { |
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212 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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213 | return -1; |
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214 | |
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215 | memcpy(data, cd, cl); |
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216 | todo -= cl; |
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217 | data += cl; |
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218 | *len += cl; |
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219 | |
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220 | if ( roar_buffer_next(&cur) == -1 ) |
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221 | return -1; |
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222 | } |
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223 | |
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224 | /* |
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225 | if ( cur == NULL ) |
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226 | break; |
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227 | */ |
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228 | } |
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229 | |
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230 | *buf = cur; |
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231 | |
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232 | return 0; |
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233 | } |
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234 | |
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235 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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236 | if ( buf == NULL ) |
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237 | return -1; |
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238 | |
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239 | buf->meta = meta; |
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240 | |
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241 | return 0; |
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242 | } |
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243 | |
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244 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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245 | if ( buf == NULL ) |
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246 | return -1; |
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247 | |
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248 | *meta = buf->meta; |
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249 | |
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250 | return 0; |
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251 | } |
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252 | |
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253 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
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254 | if ( buf == NULL ) |
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255 | return -1; |
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256 | |
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257 | buf->user_len = len; |
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258 | |
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259 | return 0; |
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260 | } |
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261 | |
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262 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
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263 | if ( buf == NULL ) |
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264 | return -1; |
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265 | |
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266 | *len = buf->user_len; |
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267 | |
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268 | return 0; |
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269 | } |
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270 | |
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271 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
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272 | if ( buf == NULL ) |
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273 | return -1; |
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274 | |
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275 | buf->flags |= flag; |
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276 | |
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277 | if ( reset ) |
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278 | buf->flags -= flag; |
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279 | |
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280 | return 0; |
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281 | } |
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282 | |
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283 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
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284 | if ( buf == NULL ) |
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285 | return -1; |
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286 | |
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287 | return buf->flags & flag; |
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288 | } |
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289 | |
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290 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
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291 | struct roar_buffer * cur = buf; |
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292 | struct roar_buffer * new; |
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293 | void * od, * nd; |
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294 | |
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295 | *copy = NULL; |
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296 | |
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297 | while (cur) { |
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298 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
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299 | roar_buffer_free(*copy); |
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300 | return -1; |
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301 | } |
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302 | |
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303 | if ( *copy == NULL ) |
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304 | *copy = new; |
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305 | |
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306 | roar_buffer_get_data(cur, &od); |
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307 | roar_buffer_get_data(new, &nd); |
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308 | memcpy(nd, od, cur->user_len); |
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309 | |
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310 | roar_buffer_add(*copy, new); |
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311 | |
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312 | cur = cur->next; |
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313 | } |
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314 | return 0; |
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315 | } |
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316 | |
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317 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
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318 | if ( buf == NULL ) |
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319 | return -1; |
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320 | |
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321 | stats->parts = 0; |
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322 | stats->bytes = 0; |
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323 | stats->memory_usage = 0; |
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324 | |
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325 | while (buf) { |
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326 | stats->parts++; |
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327 | stats->bytes += buf->user_len; |
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328 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
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329 | buf = buf->next; |
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330 | } |
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331 | |
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332 | return 0; |
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333 | } |
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334 | |
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335 | //ll |
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