1 | /* |
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2 | * Copyright (c) 2016, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | |
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17 | #include <string.h> |
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18 | |
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19 | #include <rld-buffer.h> |
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20 | #include <rtems-utils.h> |
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21 | |
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22 | namespace rld |
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23 | { |
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24 | namespace buffer |
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25 | { |
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26 | buffer::buffer (const size_t size, bool le) |
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27 | : data (0), |
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28 | size (size), |
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29 | le (le), |
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30 | in (0), |
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31 | out (0), |
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32 | level_ (0) |
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33 | { |
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34 | data = new uint8_t[size]; |
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35 | clear (); |
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36 | } |
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37 | |
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38 | buffer::buffer () |
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39 | : data (0), |
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40 | size (0), |
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41 | le (true), |
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42 | in (0), |
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43 | out (0), |
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44 | level_ (0) |
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45 | { |
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46 | } |
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47 | |
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48 | buffer::buffer (const buffer& orig) |
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49 | : data (0), |
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50 | size (orig.size), |
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51 | le (orig.le), |
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52 | in (orig.in), |
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53 | out (orig.out), |
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54 | level_ (orig.level_) |
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55 | { |
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56 | data = new uint8_t[size]; |
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57 | memcpy (data, orig.data, size); |
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58 | } |
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59 | |
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60 | buffer::~buffer () |
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61 | { |
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62 | if (data) |
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63 | delete [] data; |
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64 | } |
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65 | |
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66 | void |
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67 | buffer::clear () |
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68 | { |
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69 | memset (data, 0, size); |
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70 | out = 0; |
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71 | in = 0; |
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72 | level_ = 0; |
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73 | } |
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74 | |
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75 | void |
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76 | buffer::write (const void* data_, const size_t length) |
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77 | { |
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78 | if ((out + length) > size) |
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79 | throw rld::error ("Buffer overflow", "buffer:write"); |
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80 | memcpy (&data[out], data_, length); |
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81 | out += length; |
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82 | if (out > level_) |
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83 | level_ = out; |
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84 | } |
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85 | |
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86 | void |
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87 | buffer::read (void* data_, const size_t length) |
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88 | { |
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89 | if ((in + length) > level_) |
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90 | throw rld::error ("Buffer underflow", "buffer:read"); |
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91 | memcpy (data_, &data[in], length); |
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92 | in += length; |
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93 | } |
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94 | |
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95 | void |
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96 | buffer::fill (const size_t length, const uint8_t value) |
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97 | { |
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98 | if ((out + length) > size) |
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99 | throw rld::error ("Buffer overflow", "buffer:fill"); |
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100 | memset (&data[out], value, length); |
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101 | out += length; |
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102 | if (out > level_) |
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103 | level_ = out; |
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104 | } |
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105 | |
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106 | void |
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107 | buffer::set (const size_t out_, const uint8_t value) |
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108 | { |
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109 | if (out_ < out) |
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110 | throw rld::error ("Invalid set out", "buffer:set"); |
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111 | fill (out_ - out, value); |
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112 | } |
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113 | |
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114 | size_t |
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115 | buffer::level () const |
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116 | { |
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117 | return level_; |
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118 | } |
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119 | |
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120 | void |
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121 | buffer::write (files::image& img) |
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122 | { |
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123 | if (out > 0) |
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124 | { |
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125 | img.write (data, level_); |
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126 | clear (); |
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127 | } |
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128 | } |
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129 | |
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130 | void |
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131 | buffer::read (files::image& img, size_t length) |
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132 | { |
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133 | if (length > size) |
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134 | throw rld::error ("Invalid length", "buffer:read"); |
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135 | if (length == 0) |
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136 | length = size; |
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137 | img.read (data, length); |
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138 | in = 0; |
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139 | out = 0; |
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140 | level_ = length; |
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141 | } |
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142 | |
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143 | void |
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144 | buffer::dump () |
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145 | { |
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146 | rtems::utils::dump (data, level_, 1); |
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147 | } |
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148 | |
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149 | buffer& operator<< (buffer& buf, const uint64_t value) |
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150 | { |
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151 | write < uint64_t > (buf, value); |
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152 | return buf; |
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153 | } |
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154 | |
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155 | buffer& operator>> (buffer& buf, uint64_t& value) |
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156 | { |
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157 | read < uint64_t > (buf, value); |
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158 | return buf; |
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159 | } |
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160 | |
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161 | buffer& operator<< (buffer& buf, const uint32_t value) |
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162 | { |
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163 | write < uint32_t > (buf, value); |
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164 | return buf; |
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165 | } |
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166 | |
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167 | buffer& operator>> (buffer& buf, uint32_t& value) |
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168 | { |
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169 | read < uint32_t > (buf, value); |
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170 | return buf; |
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171 | } |
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172 | |
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173 | buffer& operator<< (buffer& buf, const uint16_t value) |
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174 | { |
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175 | write < uint16_t > (buf, value); |
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176 | return buf; |
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177 | } |
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178 | |
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179 | buffer& operator>> (buffer& buf, uint16_t& value) |
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180 | { |
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181 | read < uint16_t > (buf, value); |
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182 | return buf; |
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183 | } |
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184 | |
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185 | buffer& operator<< (buffer& buf, const uint8_t value) |
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186 | { |
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187 | buf.write (&value, 1); |
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188 | return buf; |
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189 | } |
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190 | |
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191 | buffer& operator>> (buffer& buf, uint8_t& value) |
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192 | { |
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193 | buf.read (&value, 1); |
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194 | return buf; |
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195 | } |
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196 | |
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197 | buffer& operator<< (buffer& buf, const std::string& str) |
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198 | { |
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199 | buf.write (str.c_str (), str.size ()); |
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200 | return buf; |
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201 | } |
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202 | |
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203 | b_fill fill (const size_t amount, const uint8_t value) |
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204 | { |
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205 | return b_fill (amount, value); |
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206 | } |
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207 | |
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208 | b_set set (const size_t level, const uint8_t value) |
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209 | { |
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210 | return b_set (level, value); |
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211 | } |
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212 | |
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213 | b_skip skip (const size_t amount) |
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214 | { |
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215 | return b_skip (amount); |
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216 | } |
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217 | } |
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218 | } |
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