1 | /* |
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2 | * Copyright (c) 2012, 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 | * @file |
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18 | * |
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19 | * @ingroup rtems_ld |
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20 | * |
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21 | * @brief RTEMS Linker. |
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22 | * |
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23 | */ |
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24 | |
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25 | #if HAVE_CONFIG_H |
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26 | #include "config.h" |
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27 | #endif |
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28 | |
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29 | #include <fstream> |
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30 | #include <iostream> |
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31 | |
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32 | #include <errno.h> |
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33 | #include <string.h> |
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34 | |
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35 | #include <rld.h> |
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36 | #include <rld-compression.h> |
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37 | |
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38 | #include "fastlz.h" |
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39 | |
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40 | namespace rld |
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41 | { |
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42 | namespace compress |
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43 | { |
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44 | compressor::compressor (files::image& image, |
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45 | size_t size, |
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46 | bool compress) |
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47 | : image (image), |
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48 | size (size), |
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49 | compress (compress), |
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50 | buffer (0), |
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51 | io (0), |
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52 | level (0), |
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53 | total (0), |
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54 | total_compressed (0) |
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55 | { |
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56 | if (size > 0xffff) |
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57 | throw rld::error ("Size too big, 16 bits only", "compression"); |
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58 | |
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59 | buffer = new uint8_t[size]; |
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60 | io = new uint8_t[size + (size / 10)]; |
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61 | } |
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62 | |
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63 | compressor::~compressor () |
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64 | { |
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65 | flush (); |
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66 | delete [] buffer; |
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67 | delete [] io; |
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68 | } |
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69 | |
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70 | void |
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71 | compressor::write (const void* data_, size_t length) |
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72 | { |
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73 | const uint8_t* data = static_cast <const uint8_t*> (data_); |
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74 | |
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75 | while (length) |
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76 | { |
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77 | size_t appending; |
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78 | |
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79 | if (length > (size - level)) |
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80 | appending = size - level; |
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81 | else |
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82 | appending = length; |
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83 | |
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84 | ::memcpy ((void*) (buffer + level), data, appending); |
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85 | |
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86 | level += appending; |
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87 | length -= appending; |
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88 | |
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89 | output (); |
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90 | } |
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91 | } |
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92 | |
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93 | void |
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94 | compressor::write (files::image& input, off_t offset, size_t length) |
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95 | { |
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96 | input.seek (offset); |
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97 | |
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98 | while (length) |
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99 | { |
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100 | size_t appending; |
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101 | |
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102 | if (length > (size - level)) |
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103 | appending = size - level; |
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104 | else |
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105 | appending = length; |
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106 | |
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107 | input.read ((void*) (buffer + level), appending); |
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108 | |
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109 | level += appending; |
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110 | length -= appending; |
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111 | |
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112 | output (); |
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113 | } |
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114 | } |
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115 | |
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116 | void |
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117 | compressor::flush () |
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118 | { |
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119 | output (true); |
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120 | } |
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121 | |
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122 | size_t |
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123 | compressor::transferred () const |
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124 | { |
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125 | return total; |
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126 | } |
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127 | |
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128 | size_t |
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129 | compressor::compressed () const |
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130 | { |
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131 | return total_compressed; |
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132 | } |
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133 | |
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134 | void |
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135 | compressor::output (bool forced) |
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136 | { |
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137 | if ((forced && level) || (level >= size)) |
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138 | { |
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139 | total += level; |
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140 | |
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141 | if (compress) |
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142 | { |
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143 | int writing = ::fastlz_compress (buffer, level, io); |
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144 | uint8_t header[2]; |
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145 | |
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146 | header[0] = writing >> 8; |
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147 | header[1] = writing; |
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148 | |
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149 | image.write (header, 2); |
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150 | image.write (io, writing); |
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151 | |
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152 | total_compressed += 2 + writing; |
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153 | } |
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154 | else |
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155 | { |
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156 | image.write (buffer, level); |
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157 | } |
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158 | |
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159 | level = 0; |
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160 | } |
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161 | } |
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162 | |
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163 | } |
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164 | } |
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