[3f37835] | 1 | /* |
---|
| 2 | * Copyright (c) 2012, Chris Johns <chrisj@rtems.org> |
---|
| 3 | * |
---|
| 4 | * Permission to use, copy, modify, and/or distribute this software for any |
---|
| 5 | * purpose with or without fee is hereby granted, provided that the above |
---|
| 6 | * copyright notice and this permission notice appear in all copies. |
---|
| 7 | * |
---|
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
---|
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
---|
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
---|
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
---|
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
---|
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
---|
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
---|
| 15 | */ |
---|
| 16 | /** |
---|
| 17 | * @file |
---|
| 18 | * |
---|
| 19 | * @ingroup rtems_ld |
---|
| 20 | * |
---|
| 21 | * @brief RTEMS Linker. |
---|
| 22 | * |
---|
| 23 | */ |
---|
| 24 | |
---|
| 25 | #if HAVE_CONFIG_H |
---|
| 26 | #include "config.h" |
---|
| 27 | #endif |
---|
| 28 | |
---|
| 29 | #include <fstream> |
---|
| 30 | #include <iostream> |
---|
| 31 | |
---|
| 32 | #include <errno.h> |
---|
| 33 | #include <string.h> |
---|
| 34 | |
---|
| 35 | #include <rld.h> |
---|
| 36 | #include <rld-compression.h> |
---|
| 37 | |
---|
| 38 | #include "fastlz.h" |
---|
| 39 | |
---|
| 40 | namespace rld |
---|
| 41 | { |
---|
| 42 | namespace compress |
---|
| 43 | { |
---|
| 44 | compressor::compressor (files::image& image, |
---|
| 45 | size_t size, |
---|
[db216fe] | 46 | bool out, |
---|
[3f37835] | 47 | bool compress) |
---|
| 48 | : image (image), |
---|
| 49 | size (size), |
---|
[db216fe] | 50 | out (out), |
---|
[3f37835] | 51 | compress (compress), |
---|
| 52 | buffer (0), |
---|
| 53 | io (0), |
---|
| 54 | level (0), |
---|
| 55 | total (0), |
---|
| 56 | total_compressed (0) |
---|
| 57 | { |
---|
[93e80d5] | 58 | if (size > 0xffff) |
---|
| 59 | throw rld::error ("Size too big, 16 bits only", "compression"); |
---|
| 60 | |
---|
[3f37835] | 61 | buffer = new uint8_t[size]; |
---|
| 62 | io = new uint8_t[size + (size / 10)]; |
---|
| 63 | } |
---|
| 64 | |
---|
| 65 | compressor::~compressor () |
---|
| 66 | { |
---|
| 67 | flush (); |
---|
| 68 | delete [] buffer; |
---|
| 69 | delete [] io; |
---|
| 70 | } |
---|
| 71 | |
---|
| 72 | void |
---|
| 73 | compressor::write (const void* data_, size_t length) |
---|
| 74 | { |
---|
[db216fe] | 75 | if (!out) |
---|
| 76 | throw rld::error ("Write on read-only", "compression"); |
---|
| 77 | |
---|
[3f37835] | 78 | const uint8_t* data = static_cast <const uint8_t*> (data_); |
---|
| 79 | |
---|
[93e80d5] | 80 | while (length) |
---|
[3f37835] | 81 | { |
---|
[93e80d5] | 82 | size_t appending; |
---|
[3f37835] | 83 | |
---|
[93e80d5] | 84 | if (length > (size - level)) |
---|
| 85 | appending = size - level; |
---|
| 86 | else |
---|
| 87 | appending = length; |
---|
[3f37835] | 88 | |
---|
[93e80d5] | 89 | ::memcpy ((void*) (buffer + level), data, appending); |
---|
[3f37835] | 90 | |
---|
[194160c] | 91 | data += appending; |
---|
[93e80d5] | 92 | level += appending; |
---|
| 93 | length -= appending; |
---|
[194160c] | 94 | total += appending; |
---|
[3f37835] | 95 | |
---|
[93e80d5] | 96 | output (); |
---|
[3f37835] | 97 | } |
---|
| 98 | } |
---|
| 99 | |
---|
[076d935] | 100 | void |
---|
| 101 | compressor::write (files::image& input, off_t offset, size_t length) |
---|
| 102 | { |
---|
[db216fe] | 103 | if (!out) |
---|
| 104 | throw rld::error ("Write on read-only", "compression"); |
---|
| 105 | |
---|
[076d935] | 106 | input.seek (offset); |
---|
| 107 | |
---|
| 108 | while (length) |
---|
| 109 | { |
---|
| 110 | size_t appending; |
---|
| 111 | |
---|
| 112 | if (length > (size - level)) |
---|
| 113 | appending = size - level; |
---|
| 114 | else |
---|
| 115 | appending = length; |
---|
| 116 | |
---|
| 117 | input.read ((void*) (buffer + level), appending); |
---|
| 118 | |
---|
| 119 | level += appending; |
---|
| 120 | length -= appending; |
---|
[194160c] | 121 | total += appending; |
---|
[076d935] | 122 | |
---|
[93e80d5] | 123 | output (); |
---|
[076d935] | 124 | } |
---|
| 125 | } |
---|
| 126 | |
---|
[4e9b324] | 127 | size_t |
---|
[db216fe] | 128 | compressor::read (void* data_, size_t length) |
---|
| 129 | { |
---|
| 130 | if (out) |
---|
| 131 | throw rld::error ("Read on write-only", "compression"); |
---|
| 132 | |
---|
| 133 | uint8_t* data = static_cast <uint8_t*> (data_); |
---|
| 134 | |
---|
[4e9b324] | 135 | size_t amount = 0; |
---|
| 136 | |
---|
[db216fe] | 137 | while (length) |
---|
| 138 | { |
---|
| 139 | input (); |
---|
| 140 | |
---|
[4e9b324] | 141 | if (level == 0) |
---|
| 142 | break; |
---|
| 143 | |
---|
[db216fe] | 144 | size_t appending; |
---|
| 145 | |
---|
| 146 | if (length > level) |
---|
| 147 | appending = level; |
---|
| 148 | else |
---|
| 149 | appending = length; |
---|
| 150 | |
---|
| 151 | ::memcpy (data, buffer, appending); |
---|
[4e9b324] | 152 | ::memmove (buffer, buffer + appending, level - appending); |
---|
[db216fe] | 153 | |
---|
| 154 | data += appending; |
---|
| 155 | level -= appending; |
---|
| 156 | length -= appending; |
---|
| 157 | total += appending; |
---|
[4e9b324] | 158 | amount += appending; |
---|
[db216fe] | 159 | } |
---|
[4e9b324] | 160 | |
---|
| 161 | return amount; |
---|
[db216fe] | 162 | } |
---|
| 163 | |
---|
[4e9b324] | 164 | size_t |
---|
[db216fe] | 165 | compressor::read (files::image& output_, off_t offset, size_t length) |
---|
| 166 | { |
---|
| 167 | if (out) |
---|
| 168 | throw rld::error ("Read on write-only", "compression"); |
---|
| 169 | |
---|
| 170 | output_.seek (offset); |
---|
| 171 | |
---|
[4e9b324] | 172 | return read (output_, length); |
---|
| 173 | } |
---|
| 174 | |
---|
| 175 | size_t |
---|
| 176 | compressor::read (files::image& output_, size_t length) |
---|
| 177 | { |
---|
| 178 | if (out) |
---|
| 179 | throw rld::error ("Read on write-only", "compression"); |
---|
| 180 | |
---|
| 181 | size_t amount = 0; |
---|
| 182 | |
---|
[db216fe] | 183 | while (length) |
---|
| 184 | { |
---|
| 185 | input (); |
---|
| 186 | |
---|
[4e9b324] | 187 | if (level == 0) |
---|
| 188 | break; |
---|
| 189 | |
---|
[db216fe] | 190 | size_t appending; |
---|
| 191 | |
---|
| 192 | if (length > level) |
---|
| 193 | appending = level; |
---|
| 194 | else |
---|
| 195 | appending = length; |
---|
| 196 | |
---|
| 197 | output_.write (buffer, appending); |
---|
| 198 | |
---|
[4e9b324] | 199 | ::memmove (buffer, buffer + appending, level - appending); |
---|
| 200 | |
---|
[db216fe] | 201 | level -= appending; |
---|
| 202 | length -= appending; |
---|
| 203 | total += appending; |
---|
[4e9b324] | 204 | amount += appending; |
---|
[db216fe] | 205 | } |
---|
[4e9b324] | 206 | |
---|
| 207 | return amount; |
---|
[db216fe] | 208 | } |
---|
| 209 | |
---|
[3f37835] | 210 | void |
---|
| 211 | compressor::flush () |
---|
| 212 | { |
---|
[93e80d5] | 213 | output (true); |
---|
[3f37835] | 214 | } |
---|
| 215 | |
---|
| 216 | size_t |
---|
| 217 | compressor::transferred () const |
---|
| 218 | { |
---|
| 219 | return total; |
---|
| 220 | } |
---|
| 221 | |
---|
| 222 | size_t |
---|
| 223 | compressor::compressed () const |
---|
| 224 | { |
---|
| 225 | return total_compressed; |
---|
| 226 | } |
---|
| 227 | |
---|
[4e9b324] | 228 | off_t |
---|
| 229 | compressor::offset () const |
---|
| 230 | { |
---|
| 231 | return total; |
---|
| 232 | } |
---|
| 233 | |
---|
[93e80d5] | 234 | void |
---|
| 235 | compressor::output (bool forced) |
---|
| 236 | { |
---|
[db216fe] | 237 | if (out && ((forced && level) || (level >= size))) |
---|
[93e80d5] | 238 | { |
---|
| 239 | if (compress) |
---|
| 240 | { |
---|
| 241 | int writing = ::fastlz_compress (buffer, level, io); |
---|
| 242 | uint8_t header[2]; |
---|
| 243 | |
---|
[194160c] | 244 | if (rld::verbose () >= RLD_VERBOSE_FULL_DEBUG) |
---|
| 245 | std::cout << "rtl: comp: offset=" << total_compressed |
---|
| 246 | << " block-size=" << writing << std::endl; |
---|
| 247 | |
---|
[93e80d5] | 248 | header[0] = writing >> 8; |
---|
| 249 | header[1] = writing; |
---|
| 250 | |
---|
| 251 | image.write (header, 2); |
---|
| 252 | image.write (io, writing); |
---|
| 253 | |
---|
| 254 | total_compressed += 2 + writing; |
---|
| 255 | } |
---|
| 256 | else |
---|
| 257 | { |
---|
| 258 | image.write (buffer, level); |
---|
| 259 | } |
---|
| 260 | |
---|
| 261 | level = 0; |
---|
| 262 | } |
---|
| 263 | } |
---|
| 264 | |
---|
[db216fe] | 265 | void |
---|
| 266 | compressor::input () |
---|
| 267 | { |
---|
| 268 | if (!out && (level == 0)) |
---|
| 269 | { |
---|
| 270 | if (compress) |
---|
| 271 | { |
---|
| 272 | uint8_t header[2]; |
---|
| 273 | |
---|
[4e9b324] | 274 | if (image.read (header, 2) == 2) |
---|
| 275 | { |
---|
[875c071] | 276 | ssize_t block_size = |
---|
| 277 | (((ssize_t) header[0]) << 8) | (ssize_t) header[1]; |
---|
[db216fe] | 278 | |
---|
[4e9b324] | 279 | if (block_size == 0) |
---|
| 280 | throw rld::error ("Block size is invalid (0)", "compression"); |
---|
[db216fe] | 281 | |
---|
[4e9b324] | 282 | total_compressed += 2 + block_size; |
---|
[db216fe] | 283 | |
---|
[4e9b324] | 284 | if (rld::verbose () >= RLD_VERBOSE_FULL_DEBUG) |
---|
| 285 | std::cout << "rtl: decomp: block-size=" << block_size |
---|
| 286 | << std::endl; |
---|
[db216fe] | 287 | |
---|
[4e9b324] | 288 | if (image.read (io, block_size) != block_size) |
---|
| 289 | throw rld::error ("Read past end", "compression"); |
---|
[db216fe] | 290 | |
---|
[4e9b324] | 291 | level = ::fastlz_decompress (io, block_size, buffer, size); |
---|
| 292 | } |
---|
[db216fe] | 293 | } |
---|
| 294 | else |
---|
| 295 | { |
---|
| 296 | image.read (buffer, size); |
---|
| 297 | level = size; |
---|
| 298 | } |
---|
| 299 | } |
---|
| 300 | } |
---|
| 301 | |
---|
[3f37835] | 302 | } |
---|
| 303 | } |
---|