1 | //buffer.c: |
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2 | |
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3 | #include "libroar.h" |
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4 | |
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5 | int roar_buffer_new (struct roar_buffer ** buf, size_t len) { |
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6 | struct roar_buffer * new; |
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7 | |
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8 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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9 | |
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10 | if ((new = malloc(sizeof(struct roar_buffer))) == NULL) { |
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11 | *buf = NULL; |
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12 | return -1; |
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13 | } |
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14 | |
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15 | if ((new->data = malloc(len)) == NULL) { |
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16 | free(new); |
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17 | *buf = NULL; |
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18 | return -1; |
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19 | } |
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20 | |
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21 | new->user_data = new->data; |
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22 | |
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23 | new->next = NULL; |
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24 | |
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25 | new->len = len; |
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26 | new->user_len = len; |
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27 | *buf = new; |
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28 | |
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29 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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30 | |
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31 | return 0; |
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32 | } |
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33 | |
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34 | int roar_buffer_free (struct roar_buffer * buf) { |
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35 | struct roar_buffer * next; |
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36 | |
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37 | if ( buf == NULL ) |
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38 | return -1; |
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39 | |
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40 | while ((next = buf->next)) { |
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41 | free(buf->data); |
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42 | free(buf); |
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43 | buf = next; |
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44 | } |
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45 | |
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46 | free(buf->data); |
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47 | free(buf); |
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48 | |
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49 | return 0; |
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50 | } |
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51 | |
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52 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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53 | if ( buf == NULL ) { |
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54 | if ( next != NULL ) |
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55 | *next = NULL; |
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56 | return -1; |
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57 | } |
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58 | |
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59 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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60 | |
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61 | if ( next != NULL ) |
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62 | *next = buf->next; |
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63 | |
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64 | free(buf->data); |
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65 | free(buf); |
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66 | |
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67 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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68 | return 0; |
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69 | } |
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70 | |
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71 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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72 | if ( buf == NULL ) |
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73 | return -1; |
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74 | |
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75 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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76 | |
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77 | while ( buf->next != NULL ) { |
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78 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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79 | buf = buf->next; |
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80 | } |
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81 | |
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82 | buf->next = next; |
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83 | |
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84 | return 0; |
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85 | } |
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86 | |
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87 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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88 | if ( buf == NULL ) |
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89 | return -1; |
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90 | |
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91 | *next = buf->next; |
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92 | |
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93 | return 0; |
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94 | } |
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95 | |
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96 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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97 | if ( buf == NULL ) |
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98 | return -1; |
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99 | |
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100 | *data = buf->user_data; |
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101 | |
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102 | return 0; |
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103 | } |
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104 | |
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105 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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106 | if ( buf == NULL ) |
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107 | return -1; |
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108 | |
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109 | buf->user_len -= off; |
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110 | buf->user_data += off; |
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111 | |
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112 | return 0; |
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113 | } |
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114 | |
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115 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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116 | if ( buf == NULL ) |
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117 | return -1; |
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118 | |
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119 | buf->meta = meta; |
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120 | |
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121 | return 0; |
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122 | } |
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123 | |
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124 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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125 | if ( buf == NULL ) |
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126 | return -1; |
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127 | |
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128 | *meta = buf->meta; |
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129 | |
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130 | return 0; |
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131 | } |
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132 | |
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133 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
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134 | if ( buf == NULL ) |
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135 | return -1; |
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136 | |
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137 | buf->user_len = len; |
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138 | |
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139 | return 0; |
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140 | } |
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141 | |
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142 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
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143 | if ( buf == NULL ) |
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144 | return -1; |
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145 | |
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146 | *len = buf->user_len; |
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147 | |
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148 | return 0; |
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149 | } |
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150 | |
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151 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
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152 | struct roar_buffer * cur = buf; |
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153 | struct roar_buffer * new; |
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154 | void * od, * nd; |
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155 | |
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156 | *copy = NULL; |
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157 | |
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158 | while (cur) { |
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159 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
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160 | roar_buffer_free(*copy); |
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161 | return -1; |
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162 | } |
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163 | |
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164 | if ( *copy == NULL ) |
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165 | *copy = new; |
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166 | |
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167 | roar_buffer_get_data(cur, &od); |
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168 | roar_buffer_get_data(new, &nd); |
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169 | memcpy(nd, od, cur->user_len); |
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170 | |
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171 | roar_buffer_add(*copy, new); |
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172 | |
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173 | cur = cur->next; |
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174 | } |
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175 | return 0; |
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176 | } |
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177 | |
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178 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
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179 | if ( buf == NULL ) |
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180 | return -1; |
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181 | |
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182 | stats->parts = 0; |
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183 | stats->bytes = 0; |
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184 | stats->memory_usage = 0; |
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185 | |
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186 | while (buf) { |
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187 | stats->parts++; |
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188 | stats->bytes += buf->user_len; |
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189 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
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190 | buf = buf->next; |
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191 | } |
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192 | |
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193 | return 0; |
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194 | } |
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195 | |
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196 | //ll |
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