| 878ddf1f |
1 | /*++\r |
| 2 | \r |
| 3 | Copyright (c) 2004, Intel Corporation \r |
| 4 | All rights reserved. This program and the accompanying materials \r |
| 5 | are licensed and made available under the terms and conditions of the BSD License \r |
| 6 | which accompanies this distribution. The full text of the license may be found at \r |
| 7 | http://opensource.org/licenses/bsd-license.php \r |
| 8 | \r |
| 9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
| 10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
| 11 | \r |
| 12 | Module Name:\r |
| 13 | \r |
| 14 | EfiCompress.c\r |
| 15 | \r |
| 16 | Abstract:\r |
| 17 | \r |
| 18 | Compression routine. The compression algorithm is a mixture of\r |
| 19 | LZ77 and Huffman coding. LZ77 transforms the source data into a\r |
| 20 | sequence of Original Characters and Pointers to repeated strings.\r |
| 21 | This sequence is further divided into Blocks and Huffman codings\r |
| 22 | are applied to each Block.\r |
| 23 | \r |
| 24 | --*/\r |
| 25 | \r |
| 878ddf1f |
26 | #include "EfiCompress.h"\r |
| 27 | \r |
| 28 | //\r |
| 29 | // Macro Definitions\r |
| 30 | //\r |
| 31 | typedef INT32 NODE;\r |
| 32 | #define UINT8_BIT 8\r |
| 33 | #define THRESHOLD 3\r |
| 34 | #define INIT_CRC 0\r |
| 35 | #define WNDBIT 19\r |
| 36 | #define WNDSIZ (1U << WNDBIT)\r |
| 37 | #define MAXMATCH 256\r |
| 38 | #define BLKSIZ (1U << 14) // 16 * 1024U\r |
| 39 | #define PERC_FLAG 0x80000000U\r |
| 40 | #define CODE_BIT 16\r |
| 41 | #define NIL 0\r |
| 42 | #define MAX_HASH_VAL (3 * WNDSIZ + (WNDSIZ / 512 + 1) * UINT8_MAX)\r |
| 43 | #define HASH(p, c) ((p) + ((c) << (WNDBIT - 9)) + WNDSIZ * 2)\r |
| 44 | #define CRCPOLY 0xA001\r |
| 45 | #define UPDATE_CRC(c) mCrc = mCrcTable[(mCrc ^ (c)) & 0xFF] ^ (mCrc >> UINT8_BIT)\r |
| 46 | \r |
| 47 | //\r |
| 48 | // C: the Char&Len Set; P: the Position Set; T: the exTra Set\r |
| 49 | //\r |
| 50 | #define NC (UINT8_MAX + MAXMATCH + 2 - THRESHOLD)\r |
| 51 | #define CBIT 9\r |
| 52 | #define NP (WNDBIT + 1)\r |
| 53 | #define PBIT 5\r |
| 54 | #define NT (CODE_BIT + 3)\r |
| 55 | #define TBIT 5\r |
| 56 | #if NT > NP\r |
| 57 | #define NPT NT\r |
| 58 | #else\r |
| 59 | #define NPT NP\r |
| 60 | #endif\r |
| 61 | //\r |
| 62 | // Function Prototypes\r |
| 63 | //\r |
| 64 | STATIC VOID PutDword(IN UINT32 Data);\r |
| 65 | \r |
| 66 | STATIC\r |
| 67 | EFI_STATUS\r |
| 68 | AllocateMemory (\r |
| 69 | VOID\r |
| 70 | );\r |
| 71 | \r |
| 72 | STATIC\r |
| 73 | VOID\r |
| 74 | FreeMemory (\r |
| 75 | VOID\r |
| 76 | );\r |
| 77 | \r |
| 78 | STATIC\r |
| 79 | VOID\r |
| 80 | InitSlide (\r |
| 81 | VOID\r |
| 82 | );\r |
| 83 | \r |
| 84 | STATIC\r |
| 85 | NODE\r |
| 86 | Child (\r |
| 87 | IN NODE NodeQ,\r |
| 88 | IN UINT8 CharC\r |
| 89 | );\r |
| 90 | \r |
| 91 | STATIC\r |
| 92 | VOID\r |
| 93 | MakeChild (\r |
| 94 | IN NODE NodeQ,\r |
| 95 | IN UINT8 CharC,\r |
| 96 | IN NODE NodeR\r |
| 97 | );\r |
| 98 | \r |
| 99 | STATIC\r |
| 100 | VOID\r |
| 101 | Split (\r |
| 102 | IN NODE Old\r |
| 103 | );\r |
| 104 | \r |
| 105 | STATIC\r |
| 106 | VOID\r |
| 107 | InsertNode (\r |
| 108 | VOID\r |
| 109 | );\r |
| 110 | \r |
| 111 | STATIC\r |
| 112 | VOID\r |
| 113 | DeleteNode (\r |
| 114 | VOID\r |
| 115 | );\r |
| 116 | \r |
| 117 | STATIC\r |
| 118 | VOID\r |
| 119 | GetNextMatch (\r |
| 120 | VOID\r |
| 121 | );\r |
| 122 | \r |
| 123 | STATIC\r |
| 124 | EFI_STATUS\r |
| 125 | Encode (\r |
| 126 | VOID\r |
| 127 | );\r |
| 128 | \r |
| 129 | STATIC\r |
| 130 | VOID\r |
| 131 | CountTFreq (\r |
| 132 | VOID\r |
| 133 | );\r |
| 134 | \r |
| 135 | STATIC\r |
| 136 | VOID\r |
| 137 | WritePTLen (\r |
| 138 | IN INT32 Number,\r |
| 139 | IN INT32 nbit,\r |
| 140 | IN INT32 Special\r |
| 141 | );\r |
| 142 | \r |
| 143 | STATIC\r |
| 144 | VOID\r |
| 145 | WriteCLen (\r |
| 146 | VOID\r |
| 147 | );\r |
| 148 | \r |
| 149 | STATIC\r |
| 150 | VOID\r |
| 151 | EncodeC (\r |
| 152 | IN INT32 Value\r |
| 153 | );\r |
| 154 | \r |
| 155 | STATIC\r |
| 156 | VOID\r |
| 157 | EncodeP (\r |
| 158 | IN UINT32 Value\r |
| 159 | );\r |
| 160 | \r |
| 161 | STATIC\r |
| 162 | VOID\r |
| 163 | SendBlock (\r |
| 164 | VOID\r |
| 165 | );\r |
| 166 | \r |
| 167 | STATIC\r |
| 168 | VOID\r |
| 169 | Output (\r |
| 170 | IN UINT32 c,\r |
| 171 | IN UINT32 p\r |
| 172 | );\r |
| 173 | \r |
| 174 | STATIC\r |
| 175 | VOID\r |
| 176 | HufEncodeStart (\r |
| 177 | VOID\r |
| 178 | );\r |
| 179 | \r |
| 180 | STATIC\r |
| 181 | VOID\r |
| 182 | HufEncodeEnd (\r |
| 183 | VOID\r |
| 184 | );\r |
| 185 | \r |
| 186 | STATIC\r |
| 187 | VOID\r |
| 188 | MakeCrcTable (\r |
| 189 | VOID\r |
| 190 | );\r |
| 191 | \r |
| 192 | STATIC\r |
| 193 | VOID\r |
| 194 | PutBits (\r |
| 195 | IN INT32 Number,\r |
| 196 | IN UINT32 Value\r |
| 197 | );\r |
| 198 | \r |
| 199 | STATIC\r |
| 200 | INT32\r |
| 201 | FreadCrc (\r |
| 202 | OUT UINT8 *Pointer,\r |
| 203 | IN INT32 Number\r |
| 204 | );\r |
| 205 | \r |
| 206 | STATIC\r |
| 207 | VOID\r |
| 208 | InitPutBits (\r |
| 209 | VOID\r |
| 210 | );\r |
| 211 | \r |
| 212 | STATIC\r |
| 213 | VOID\r |
| 214 | CountLen (\r |
| 215 | IN INT32 Index\r |
| 216 | );\r |
| 217 | \r |
| 218 | STATIC\r |
| 219 | VOID\r |
| 220 | MakeLen (\r |
| 221 | IN INT32 Root\r |
| 222 | );\r |
| 223 | \r |
| 224 | STATIC\r |
| 225 | VOID\r |
| 226 | DownHeap (\r |
| 227 | IN INT32 Index\r |
| 228 | );\r |
| 229 | \r |
| 230 | STATIC\r |
| 231 | VOID\r |
| 232 | MakeCode (\r |
| 233 | IN INT32 Number,\r |
| 234 | IN UINT8 Len[ ],\r |
| 235 | OUT UINT16 Code[]\r |
| 236 | );\r |
| 237 | \r |
| 238 | STATIC\r |
| 239 | INT32\r |
| 240 | MakeTree (\r |
| 241 | IN INT32 NParm,\r |
| 242 | IN UINT16 FreqParm[],\r |
| 243 | OUT UINT8 LenParm[ ],\r |
| 244 | OUT UINT16 CodeParm[]\r |
| 245 | );\r |
| 246 | \r |
| 247 | //\r |
| 248 | // Global Variables\r |
| 249 | //\r |
| 250 | static UINT8 *mSrc, *mDst, *mSrcUpperLimit, *mDstUpperLimit;\r |
| 251 | \r |
| 252 | static UINT8 *mLevel, *mText, *mChildCount, *mBuf, mCLen[NC], mPTLen[NPT], *mLen;\r |
| 253 | static INT16 mHeap[NC + 1];\r |
| 254 | static INT32 mRemainder, mMatchLen, mBitCount, mHeapSize, mN;\r |
| 255 | static UINT32 mBufSiz = 0, mOutputPos, mOutputMask, mSubBitBuf, mCrc;\r |
| 256 | static UINT32 mCompSize, mOrigSize;\r |
| 257 | \r |
| 258 | static UINT16 *mFreq, *mSortPtr, mLenCnt[17], mLeft[2 * NC - 1], mRight[2 * NC - 1], mCrcTable[UINT8_MAX + 1],\r |
| 259 | mCFreq[2 * NC - 1], mCTable[4096], mCCode[NC], mPFreq[2 * NP - 1], mPTCode[NPT], mTFreq[2 * NT - 1];\r |
| 260 | \r |
| 261 | static NODE mPos, mMatchPos, mAvail, *mPosition, *mParent, *mPrev, *mNext = NULL;\r |
| 262 | \r |
| 263 | //\r |
| 264 | // functions\r |
| 265 | //\r |
| 266 | EFI_STATUS\r |
| 267 | Compress (\r |
| 268 | IN UINT8 *SrcBuffer,\r |
| 269 | IN UINT32 SrcSize,\r |
| 270 | IN UINT8 *DstBuffer,\r |
| 271 | IN OUT UINT32 *DstSize\r |
| 272 | )\r |
| 273 | /*++\r |
| 274 | \r |
| 275 | Routine Description:\r |
| 276 | \r |
| 277 | The main compression routine.\r |
| 278 | \r |
| 279 | Arguments:\r |
| 280 | \r |
| 281 | SrcBuffer - The buffer storing the source data\r |
| 282 | SrcSize - The size of source data\r |
| 283 | DstBuffer - The buffer to store the compressed data\r |
| 284 | DstSize - On input, the size of DstBuffer; On output,\r |
| 285 | the size of the actual compressed data.\r |
| 286 | \r |
| 287 | Returns:\r |
| 288 | \r |
| 289 | EFI_BUFFER_TOO_SMALL - The DstBuffer is too small. In this case,\r |
| 290 | DstSize contains the size needed.\r |
| 291 | EFI_SUCCESS - Compression is successful.\r |
| 292 | EFI_OUT_OF_RESOURCES - No resource to complete function.\r |
| 293 | \r |
| 294 | --*/\r |
| 295 | {\r |
| 296 | EFI_STATUS Status;\r |
| 297 | \r |
| 298 | //\r |
| 299 | // Initializations\r |
| 300 | //\r |
| 301 | mBufSiz = 0;\r |
| 302 | mBuf = NULL;\r |
| 303 | mText = NULL;\r |
| 304 | mLevel = NULL;\r |
| 305 | mChildCount = NULL;\r |
| 306 | mPosition = NULL;\r |
| 307 | mParent = NULL;\r |
| 308 | mPrev = NULL;\r |
| 309 | mNext = NULL;\r |
| 310 | \r |
| 311 | mSrc = SrcBuffer;\r |
| 312 | mSrcUpperLimit = mSrc + SrcSize;\r |
| 313 | mDst = DstBuffer;\r |
| 314 | mDstUpperLimit = mDst +*DstSize;\r |
| 315 | \r |
| 316 | PutDword (0L);\r |
| 317 | PutDword (0L);\r |
| 318 | \r |
| 319 | MakeCrcTable ();\r |
| 320 | \r |
| 321 | mOrigSize = mCompSize = 0;\r |
| 322 | mCrc = INIT_CRC;\r |
| 323 | \r |
| 324 | //\r |
| 325 | // Compress it\r |
| 326 | //\r |
| 327 | Status = Encode ();\r |
| 328 | if (EFI_ERROR (Status)) {\r |
| 329 | return EFI_OUT_OF_RESOURCES;\r |
| 330 | }\r |
| 331 | //\r |
| 332 | // Null terminate the compressed data\r |
| 333 | //\r |
| 334 | if (mDst < mDstUpperLimit) {\r |
| 335 | *mDst++ = 0;\r |
| 336 | }\r |
| 337 | //\r |
| 338 | // Fill in compressed size and original size\r |
| 339 | //\r |
| 340 | mDst = DstBuffer;\r |
| 341 | PutDword (mCompSize + 1);\r |
| 342 | PutDword (mOrigSize);\r |
| 343 | \r |
| 344 | //\r |
| 345 | // Return\r |
| 346 | //\r |
| 347 | if (mCompSize + 1 + 8 > *DstSize) {\r |
| 348 | *DstSize = mCompSize + 1 + 8;\r |
| 349 | return EFI_BUFFER_TOO_SMALL;\r |
| 350 | } else {\r |
| 351 | *DstSize = mCompSize + 1 + 8;\r |
| 352 | return EFI_SUCCESS;\r |
| 353 | }\r |
| 354 | \r |
| 355 | }\r |
| 356 | \r |
| 357 | STATIC\r |
| 358 | VOID\r |
| 359 | PutDword (\r |
| 360 | IN UINT32 Data\r |
| 361 | )\r |
| 362 | /*++\r |
| 363 | \r |
| 364 | Routine Description:\r |
| 365 | \r |
| 366 | Put a dword to output stream\r |
| 367 | \r |
| 368 | Arguments:\r |
| 369 | \r |
| 370 | Data - the dword to put\r |
| 371 | \r |
| 372 | Returns: (VOID)\r |
| 373 | \r |
| 374 | --*/\r |
| 375 | {\r |
| 376 | if (mDst < mDstUpperLimit) {\r |
| 377 | *mDst++ = (UINT8) (((UINT8) (Data)) & 0xff);\r |
| 378 | }\r |
| 379 | \r |
| 380 | if (mDst < mDstUpperLimit) {\r |
| 381 | *mDst++ = (UINT8) (((UINT8) (Data >> 0x08)) & 0xff);\r |
| 382 | }\r |
| 383 | \r |
| 384 | if (mDst < mDstUpperLimit) {\r |
| 385 | *mDst++ = (UINT8) (((UINT8) (Data >> 0x10)) & 0xff);\r |
| 386 | }\r |
| 387 | \r |
| 388 | if (mDst < mDstUpperLimit) {\r |
| 389 | *mDst++ = (UINT8) (((UINT8) (Data >> 0x18)) & 0xff);\r |
| 390 | }\r |
| 391 | }\r |
| 392 | \r |
| 393 | STATIC\r |
| 394 | EFI_STATUS\r |
| 395 | AllocateMemory (\r |
| 396 | VOID\r |
| 397 | )\r |
| 398 | /*++\r |
| 399 | \r |
| 400 | Routine Description:\r |
| 401 | \r |
| 402 | Allocate memory spaces for data structures used in compression process\r |
| 403 | \r |
| 404 | Argements: \r |
| 405 | VOID\r |
| 406 | \r |
| 407 | Returns:\r |
| 408 | \r |
| 409 | EFI_SUCCESS - Memory is allocated successfully\r |
| 410 | EFI_OUT_OF_RESOURCES - Allocation fails\r |
| 411 | \r |
| 412 | --*/\r |
| 413 | {\r |
| 414 | UINT32 Index;\r |
| 415 | \r |
| 416 | mText = malloc (WNDSIZ * 2 + MAXMATCH);\r |
| 417 | for (Index = 0; Index < WNDSIZ * 2 + MAXMATCH; Index++) {\r |
| 418 | mText[Index] = 0;\r |
| 419 | }\r |
| 420 | \r |
| 421 | mLevel = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mLevel));\r |
| 422 | mChildCount = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mChildCount));\r |
| 423 | mPosition = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mPosition));\r |
| 424 | mParent = malloc (WNDSIZ * 2 * sizeof (*mParent));\r |
| 425 | mPrev = malloc (WNDSIZ * 2 * sizeof (*mPrev));\r |
| 426 | mNext = malloc ((MAX_HASH_VAL + 1) * sizeof (*mNext));\r |
| 427 | \r |
| 428 | mBufSiz = BLKSIZ;\r |
| 429 | mBuf = malloc (mBufSiz);\r |
| 430 | while (mBuf == NULL) {\r |
| 431 | mBufSiz = (mBufSiz / 10U) * 9U;\r |
| 432 | if (mBufSiz < 4 * 1024U) {\r |
| 433 | return EFI_OUT_OF_RESOURCES;\r |
| 434 | }\r |
| 435 | \r |
| 436 | mBuf = malloc (mBufSiz);\r |
| 437 | }\r |
| 438 | \r |
| 439 | mBuf[0] = 0;\r |
| 440 | \r |
| 441 | return EFI_SUCCESS;\r |
| 442 | }\r |
| 443 | \r |
| 444 | VOID\r |
| 445 | FreeMemory (\r |
| 446 | VOID\r |
| 447 | )\r |
| 448 | /*++\r |
| 449 | \r |
| 450 | Routine Description:\r |
| 451 | \r |
| 452 | Called when compression is completed to free memory previously allocated.\r |
| 453 | \r |
| 454 | Arguments: (VOID)\r |
| 455 | \r |
| 456 | Returns: (VOID)\r |
| 457 | \r |
| 458 | --*/\r |
| 459 | {\r |
| 460 | if (mText != NULL) {\r |
| 461 | free (mText);\r |
| 462 | }\r |
| 463 | \r |
| 464 | if (mLevel != NULL) {\r |
| 465 | free (mLevel);\r |
| 466 | }\r |
| 467 | \r |
| 468 | if (mChildCount != NULL) {\r |
| 469 | free (mChildCount);\r |
| 470 | }\r |
| 471 | \r |
| 472 | if (mPosition != NULL) {\r |
| 473 | free (mPosition);\r |
| 474 | }\r |
| 475 | \r |
| 476 | if (mParent != NULL) {\r |
| 477 | free (mParent);\r |
| 478 | }\r |
| 479 | \r |
| 480 | if (mPrev != NULL) {\r |
| 481 | free (mPrev);\r |
| 482 | }\r |
| 483 | \r |
| 484 | if (mNext != NULL) {\r |
| 485 | free (mNext);\r |
| 486 | }\r |
| 487 | \r |
| 488 | if (mBuf != NULL) {\r |
| 489 | free (mBuf);\r |
| 490 | }\r |
| 491 | \r |
| 492 | return ;\r |
| 493 | }\r |
| 494 | \r |
| 495 | STATIC\r |
| 496 | VOID\r |
| 497 | InitSlide (\r |
| 498 | VOID\r |
| 499 | )\r |
| 500 | /*++\r |
| 501 | \r |
| 502 | Routine Description:\r |
| 503 | \r |
| 504 | Initialize String Info Log data structures\r |
| 505 | \r |
| 506 | Arguments: (VOID)\r |
| 507 | \r |
| 508 | Returns: (VOID)\r |
| 509 | \r |
| 510 | --*/\r |
| 511 | {\r |
| 512 | NODE Index;\r |
| 513 | \r |
| 514 | for (Index = WNDSIZ; Index <= WNDSIZ + UINT8_MAX; Index++) {\r |
| 515 | mLevel[Index] = 1;\r |
| 516 | mPosition[Index] = NIL; /* sentinel */\r |
| 517 | }\r |
| 518 | \r |
| 519 | for (Index = WNDSIZ; Index < WNDSIZ * 2; Index++) {\r |
| 520 | mParent[Index] = NIL;\r |
| 521 | }\r |
| 522 | \r |
| 523 | mAvail = 1;\r |
| 524 | for (Index = 1; Index < WNDSIZ - 1; Index++) {\r |
| 525 | mNext[Index] = (NODE) (Index + 1);\r |
| 526 | }\r |
| 527 | \r |
| 528 | mNext[WNDSIZ - 1] = NIL;\r |
| 529 | for (Index = WNDSIZ * 2; Index <= MAX_HASH_VAL; Index++) {\r |
| 530 | mNext[Index] = NIL;\r |
| 531 | }\r |
| 532 | }\r |
| 533 | \r |
| 534 | STATIC\r |
| 535 | NODE\r |
| 536 | Child (\r |
| 537 | IN NODE NodeQ,\r |
| 538 | IN UINT8 CharC\r |
| 539 | )\r |
| 540 | /*++\r |
| 541 | \r |
| 542 | Routine Description:\r |
| 543 | \r |
| 544 | Find child node given the parent node and the edge character\r |
| 545 | \r |
| 546 | Arguments:\r |
| 547 | \r |
| 548 | NodeQ - the parent node\r |
| 549 | CharC - the edge character\r |
| 550 | \r |
| 551 | Returns:\r |
| 552 | \r |
| 553 | The child node (NIL if not found) \r |
| 554 | \r |
| 555 | --*/\r |
| 556 | {\r |
| 557 | NODE NodeR;\r |
| 558 | \r |
| 559 | NodeR = mNext[HASH (NodeQ, CharC)];\r |
| 560 | //\r |
| 561 | // sentinel\r |
| 562 | //\r |
| 563 | mParent[NIL] = NodeQ;\r |
| 564 | while (mParent[NodeR] != NodeQ) {\r |
| 565 | NodeR = mNext[NodeR];\r |
| 566 | }\r |
| 567 | \r |
| 568 | return NodeR;\r |
| 569 | }\r |
| 570 | \r |
| 571 | STATIC\r |
| 572 | VOID\r |
| 573 | MakeChild (\r |
| 574 | IN NODE Parent,\r |
| 575 | IN UINT8 CharC,\r |
| 576 | IN NODE Child\r |
| 577 | )\r |
| 578 | /*++\r |
| 579 | \r |
| 580 | Routine Description:\r |
| 581 | \r |
| 582 | Create a new child for a given parent node.\r |
| 583 | \r |
| 584 | Arguments:\r |
| 585 | \r |
| 586 | Parent - the parent node\r |
| 587 | CharC - the edge character\r |
| 588 | Child - the child node\r |
| 589 | \r |
| 590 | Returns: (VOID)\r |
| 591 | \r |
| 592 | --*/\r |
| 593 | {\r |
| 594 | NODE Node1;\r |
| 595 | NODE Node2;\r |
| 596 | \r |
| 597 | Node1 = (NODE) HASH (Parent, CharC);\r |
| 598 | Node2 = mNext[Node1];\r |
| 599 | mNext[Node1] = Child;\r |
| 600 | mNext[Child] = Node2;\r |
| 601 | mPrev[Node2] = Child;\r |
| 602 | mPrev[Child] = Node1;\r |
| 603 | mParent[Child] = Parent;\r |
| 604 | mChildCount[Parent]++;\r |
| 605 | }\r |
| 606 | \r |
| 607 | STATIC\r |
| 608 | VOID\r |
| 609 | Split (\r |
| 610 | NODE Old\r |
| 611 | )\r |
| 612 | /*++\r |
| 613 | \r |
| 614 | Routine Description:\r |
| 615 | \r |
| 616 | Split a node.\r |
| 617 | \r |
| 618 | Arguments:\r |
| 619 | \r |
| 620 | Old - the node to split\r |
| 621 | \r |
| 622 | Returns: (VOID)\r |
| 623 | \r |
| 624 | --*/\r |
| 625 | {\r |
| 626 | NODE New;\r |
| 627 | NODE TempNode;\r |
| 628 | \r |
| 629 | New = mAvail;\r |
| 630 | mAvail = mNext[New];\r |
| 631 | mChildCount[New] = 0;\r |
| 632 | TempNode = mPrev[Old];\r |
| 633 | mPrev[New] = TempNode;\r |
| 634 | mNext[TempNode] = New;\r |
| 635 | TempNode = mNext[Old];\r |
| 636 | mNext[New] = TempNode;\r |
| 637 | mPrev[TempNode] = New;\r |
| 638 | mParent[New] = mParent[Old];\r |
| 639 | mLevel[New] = (UINT8) mMatchLen;\r |
| 640 | mPosition[New] = mPos;\r |
| 641 | MakeChild (New, mText[mMatchPos + mMatchLen], Old);\r |
| 642 | MakeChild (New, mText[mPos + mMatchLen], mPos);\r |
| 643 | }\r |
| 644 | \r |
| 645 | STATIC\r |
| 646 | VOID\r |
| 647 | InsertNode (\r |
| 648 | VOID\r |
| 649 | )\r |
| 650 | /*++\r |
| 651 | \r |
| 652 | Routine Description:\r |
| 653 | \r |
| 654 | Insert string info for current position into the String Info Log\r |
| 655 | \r |
| 656 | Arguments: (VOID)\r |
| 657 | \r |
| 658 | Returns: (VOID)\r |
| 659 | \r |
| 660 | --*/\r |
| 661 | {\r |
| 662 | NODE NodeQ;\r |
| 663 | NODE NodeR;\r |
| 664 | NODE Index2;\r |
| 665 | NODE NodeT;\r |
| 666 | UINT8 CharC;\r |
| 667 | UINT8 *t1;\r |
| 668 | UINT8 *t2;\r |
| 669 | \r |
| 670 | if (mMatchLen >= 4) {\r |
| 671 | //\r |
| 672 | // We have just got a long match, the target tree\r |
| 673 | // can be located by MatchPos + 1. Travese the tree\r |
| 674 | // from bottom up to get to a proper starting point.\r |
| 675 | // The usage of PERC_FLAG ensures proper node deletion\r |
| 676 | // in DeleteNode() later.\r |
| 677 | //\r |
| 678 | mMatchLen--;\r |
| 679 | NodeR = (NODE) ((mMatchPos + 1) | WNDSIZ);\r |
| 680 | NodeQ = mParent[NodeR];\r |
| 681 | while (NodeQ == NIL) {\r |
| 682 | NodeR = mNext[NodeR];\r |
| 683 | NodeQ = mParent[NodeR];\r |
| 684 | }\r |
| 685 | \r |
| 686 | while (mLevel[NodeQ] >= mMatchLen) {\r |
| 687 | NodeR = NodeQ;\r |
| 688 | NodeQ = mParent[NodeQ];\r |
| 689 | }\r |
| 690 | \r |
| 691 | NodeT = NodeQ;\r |
| 692 | while (mPosition[NodeT] < 0) {\r |
| 693 | mPosition[NodeT] = mPos;\r |
| 694 | NodeT = mParent[NodeT];\r |
| 695 | }\r |
| 696 | \r |
| 697 | if (NodeT < WNDSIZ) {\r |
| 698 | mPosition[NodeT] = (NODE) (mPos | (UINT32) PERC_FLAG);\r |
| 699 | }\r |
| 700 | } else {\r |
| 701 | //\r |
| 702 | // Locate the target tree\r |
| 703 | //\r |
| 704 | NodeQ = (NODE) (mText[mPos] + WNDSIZ);\r |
| 705 | CharC = mText[mPos + 1];\r |
| 706 | NodeR = Child (NodeQ, CharC);\r |
| 707 | if (NodeR == NIL) {\r |
| 708 | MakeChild (NodeQ, CharC, mPos);\r |
| 709 | mMatchLen = 1;\r |
| 710 | return ;\r |
| 711 | }\r |
| 712 | \r |
| 713 | mMatchLen = 2;\r |
| 714 | }\r |
| 715 | //\r |
| 716 | // Traverse down the tree to find a match.\r |
| 717 | // Update Position value along the route.\r |
| 718 | // Node split or creation is involved.\r |
| 719 | //\r |
| 720 | for (;;) {\r |
| 721 | if (NodeR >= WNDSIZ) {\r |
| 722 | Index2 = MAXMATCH;\r |
| 723 | mMatchPos = NodeR;\r |
| 724 | } else {\r |
| 725 | Index2 = mLevel[NodeR];\r |
| 726 | mMatchPos = (NODE) (mPosition[NodeR] & (UINT32)~PERC_FLAG);\r |
| 727 | }\r |
| 728 | \r |
| 729 | if (mMatchPos >= mPos) {\r |
| 730 | mMatchPos -= WNDSIZ;\r |
| 731 | }\r |
| 732 | \r |
| 733 | t1 = &mText[mPos + mMatchLen];\r |
| 734 | t2 = &mText[mMatchPos + mMatchLen];\r |
| 735 | while (mMatchLen < Index2) {\r |
| 736 | if (*t1 != *t2) {\r |
| 737 | Split (NodeR);\r |
| 738 | return ;\r |
| 739 | }\r |
| 740 | \r |
| 741 | mMatchLen++;\r |
| 742 | t1++;\r |
| 743 | t2++;\r |
| 744 | }\r |
| 745 | \r |
| 746 | if (mMatchLen >= MAXMATCH) {\r |
| 747 | break;\r |
| 748 | }\r |
| 749 | \r |
| 750 | mPosition[NodeR] = mPos;\r |
| 751 | NodeQ = NodeR;\r |
| 752 | NodeR = Child (NodeQ, *t1);\r |
| 753 | if (NodeR == NIL) {\r |
| 754 | MakeChild (NodeQ, *t1, mPos);\r |
| 755 | return ;\r |
| 756 | }\r |
| 757 | \r |
| 758 | mMatchLen++;\r |
| 759 | }\r |
| 760 | \r |
| 761 | NodeT = mPrev[NodeR];\r |
| 762 | mPrev[mPos] = NodeT;\r |
| 763 | mNext[NodeT] = mPos;\r |
| 764 | NodeT = mNext[NodeR];\r |
| 765 | mNext[mPos] = NodeT;\r |
| 766 | mPrev[NodeT] = mPos;\r |
| 767 | mParent[mPos] = NodeQ;\r |
| 768 | mParent[NodeR] = NIL;\r |
| 769 | \r |
| 770 | //\r |
| 771 | // Special usage of 'next'\r |
| 772 | //\r |
| 773 | mNext[NodeR] = mPos;\r |
| 774 | \r |
| 775 | }\r |
| 776 | \r |
| 777 | STATIC\r |
| 778 | VOID\r |
| 779 | DeleteNode (\r |
| 780 | VOID\r |
| 781 | )\r |
| 782 | /*++\r |
| 783 | \r |
| 784 | Routine Description:\r |
| 785 | \r |
| 786 | Delete outdated string info. (The Usage of PERC_FLAG\r |
| 787 | ensures a clean deletion)\r |
| 788 | \r |
| 789 | Arguments: (VOID)\r |
| 790 | \r |
| 791 | Returns: (VOID)\r |
| 792 | \r |
| 793 | --*/\r |
| 794 | {\r |
| 795 | NODE NodeQ;\r |
| 796 | NODE NodeR;\r |
| 797 | NODE NodeS;\r |
| 798 | NODE NodeT;\r |
| 799 | NODE NodeU;\r |
| 800 | \r |
| 801 | if (mParent[mPos] == NIL) {\r |
| 802 | return ;\r |
| 803 | }\r |
| 804 | \r |
| 805 | NodeR = mPrev[mPos];\r |
| 806 | NodeS = mNext[mPos];\r |
| 807 | mNext[NodeR] = NodeS;\r |
| 808 | mPrev[NodeS] = NodeR;\r |
| 809 | NodeR = mParent[mPos];\r |
| 810 | mParent[mPos] = NIL;\r |
| 811 | if (NodeR >= WNDSIZ) {\r |
| 812 | return ;\r |
| 813 | }\r |
| 814 | \r |
| 815 | mChildCount[NodeR]--;\r |
| 816 | if (mChildCount[NodeR] > 1) {\r |
| 817 | return ;\r |
| 818 | }\r |
| 819 | \r |
| 820 | NodeT = (NODE) (mPosition[NodeR] & (UINT32)~PERC_FLAG);\r |
| 821 | if (NodeT >= mPos) {\r |
| 822 | NodeT -= WNDSIZ;\r |
| 823 | }\r |
| 824 | \r |
| 825 | NodeS = NodeT;\r |
| 826 | NodeQ = mParent[NodeR];\r |
| 827 | NodeU = mPosition[NodeQ];\r |
| 828 | while (NodeU & (UINT32) PERC_FLAG) {\r |
| 829 | NodeU &= (UINT32)~PERC_FLAG;\r |
| 830 | if (NodeU >= mPos) {\r |
| 831 | NodeU -= WNDSIZ;\r |
| 832 | }\r |
| 833 | \r |
| 834 | if (NodeU > NodeS) {\r |
| 835 | NodeS = NodeU;\r |
| 836 | }\r |
| 837 | \r |
| 838 | mPosition[NodeQ] = (NODE) (NodeS | WNDSIZ);\r |
| 839 | NodeQ = mParent[NodeQ];\r |
| 840 | NodeU = mPosition[NodeQ];\r |
| 841 | }\r |
| 842 | \r |
| 843 | if (NodeQ < WNDSIZ) {\r |
| 844 | if (NodeU >= mPos) {\r |
| 845 | NodeU -= WNDSIZ;\r |
| 846 | }\r |
| 847 | \r |
| 848 | if (NodeU > NodeS) {\r |
| 849 | NodeS = NodeU;\r |
| 850 | }\r |
| 851 | \r |
| 852 | mPosition[NodeQ] = (NODE) (NodeS | WNDSIZ | (UINT32) PERC_FLAG);\r |
| 853 | }\r |
| 854 | \r |
| 855 | NodeS = Child (NodeR, mText[NodeT + mLevel[NodeR]]);\r |
| 856 | NodeT = mPrev[NodeS];\r |
| 857 | NodeU = mNext[NodeS];\r |
| 858 | mNext[NodeT] = NodeU;\r |
| 859 | mPrev[NodeU] = NodeT;\r |
| 860 | NodeT = mPrev[NodeR];\r |
| 861 | mNext[NodeT] = NodeS;\r |
| 862 | mPrev[NodeS] = NodeT;\r |
| 863 | NodeT = mNext[NodeR];\r |
| 864 | mPrev[NodeT] = NodeS;\r |
| 865 | mNext[NodeS] = NodeT;\r |
| 866 | mParent[NodeS] = mParent[NodeR];\r |
| 867 | mParent[NodeR] = NIL;\r |
| 868 | mNext[NodeR] = mAvail;\r |
| 869 | mAvail = NodeR;\r |
| 870 | }\r |
| 871 | \r |
| 872 | STATIC\r |
| 873 | VOID\r |
| 874 | GetNextMatch (\r |
| 875 | VOID\r |
| 876 | )\r |
| 877 | /*++\r |
| 878 | \r |
| 879 | Routine Description:\r |
| 880 | \r |
| 881 | Advance the current position (read in new data if needed).\r |
| 882 | Delete outdated string info. Find a match string for current position.\r |
| 883 | \r |
| 884 | Arguments: (VOID)\r |
| 885 | \r |
| 886 | Returns: (VOID)\r |
| 887 | \r |
| 888 | --*/\r |
| 889 | {\r |
| 890 | INT32 Number;\r |
| 891 | \r |
| 892 | mRemainder--;\r |
| 893 | mPos++;\r |
| 894 | if (mPos == WNDSIZ * 2) {\r |
| 895 | memmove (&mText[0], &mText[WNDSIZ], WNDSIZ + MAXMATCH);\r |
| 896 | Number = FreadCrc (&mText[WNDSIZ + MAXMATCH], WNDSIZ);\r |
| 897 | mRemainder += Number;\r |
| 898 | mPos = WNDSIZ;\r |
| 899 | }\r |
| 900 | \r |
| 901 | DeleteNode ();\r |
| 902 | InsertNode ();\r |
| 903 | }\r |
| 904 | \r |
| 905 | STATIC\r |
| 906 | EFI_STATUS\r |
| 907 | Encode (\r |
| 908 | VOID\r |
| 909 | )\r |
| 910 | /*++\r |
| 911 | \r |
| 912 | Routine Description:\r |
| 913 | \r |
| 914 | The main controlling routine for compression process.\r |
| 915 | \r |
| 916 | Arguments: (VOID)\r |
| 917 | \r |
| 918 | Returns:\r |
| 919 | \r |
| 920 | EFI_SUCCESS - The compression is successful\r |
| 921 | EFI_OUT_0F_RESOURCES - Not enough memory for compression process\r |
| 922 | \r |
| 923 | --*/\r |
| 924 | {\r |
| 925 | EFI_STATUS Status;\r |
| 926 | INT32 LastMatchLen;\r |
| 927 | NODE LastMatchPos;\r |
| 928 | \r |
| 929 | Status = AllocateMemory ();\r |
| 930 | if (EFI_ERROR (Status)) {\r |
| 931 | FreeMemory ();\r |
| 932 | return Status;\r |
| 933 | }\r |
| 934 | \r |
| 935 | InitSlide ();\r |
| 936 | \r |
| 937 | HufEncodeStart ();\r |
| 938 | \r |
| 939 | mRemainder = FreadCrc (&mText[WNDSIZ], WNDSIZ + MAXMATCH);\r |
| 940 | \r |
| 941 | mMatchLen = 0;\r |
| 942 | mPos = WNDSIZ;\r |
| 943 | InsertNode ();\r |
| 944 | if (mMatchLen > mRemainder) {\r |
| 945 | mMatchLen = mRemainder;\r |
| 946 | }\r |
| 947 | \r |
| 948 | while (mRemainder > 0) {\r |
| 949 | LastMatchLen = mMatchLen;\r |
| 950 | LastMatchPos = mMatchPos;\r |
| 951 | GetNextMatch ();\r |
| 952 | if (mMatchLen > mRemainder) {\r |
| 953 | mMatchLen = mRemainder;\r |
| 954 | }\r |
| 955 | \r |
| 956 | if (mMatchLen > LastMatchLen || LastMatchLen < THRESHOLD) {\r |
| 957 | //\r |
| 958 | // Not enough benefits are gained by outputting a pointer,\r |
| 959 | // so just output the original character\r |
| 960 | //\r |
| 961 | Output (mText[mPos - 1], 0);\r |
| 962 | \r |
| 963 | } else {\r |
| 964 | \r |
| 965 | if (LastMatchLen == THRESHOLD) {\r |
| 966 | if (((mPos - LastMatchPos - 2) & (WNDSIZ - 1)) > (1U << 11)) {\r |
| 967 | Output (mText[mPos - 1], 0);\r |
| 968 | continue;\r |
| 969 | }\r |
| 970 | }\r |
| 971 | //\r |
| 972 | // Outputting a pointer is beneficial enough, do it.\r |
| 973 | //\r |
| 974 | Output (\r |
| 975 | LastMatchLen + (UINT8_MAX + 1 - THRESHOLD),\r |
| 976 | (mPos - LastMatchPos - 2) & (WNDSIZ - 1)\r |
| 977 | );\r |
| 978 | LastMatchLen--;\r |
| 979 | while (LastMatchLen > 0) {\r |
| 980 | GetNextMatch ();\r |
| 981 | LastMatchLen--;\r |
| 982 | }\r |
| 983 | \r |
| 984 | if (mMatchLen > mRemainder) {\r |
| 985 | mMatchLen = mRemainder;\r |
| 986 | }\r |
| 987 | }\r |
| 988 | }\r |
| 989 | \r |
| 990 | HufEncodeEnd ();\r |
| 991 | FreeMemory ();\r |
| 992 | return EFI_SUCCESS;\r |
| 993 | }\r |
| 994 | \r |
| 995 | STATIC\r |
| 996 | VOID\r |
| 997 | CountTFreq (\r |
| 998 | VOID\r |
| 999 | )\r |
| 1000 | /*++\r |
| 1001 | \r |
| 1002 | Routine Description:\r |
| 1003 | \r |
| 1004 | Count the frequencies for the Extra Set\r |
| 1005 | \r |
| 1006 | Arguments: (VOID)\r |
| 1007 | \r |
| 1008 | Returns: (VOID)\r |
| 1009 | \r |
| 1010 | --*/\r |
| 1011 | {\r |
| 1012 | INT32 Index;\r |
| 1013 | INT32 Index3;\r |
| 1014 | INT32 Number;\r |
| 1015 | INT32 Count;\r |
| 1016 | \r |
| 1017 | for (Index = 0; Index < NT; Index++) {\r |
| 1018 | mTFreq[Index] = 0;\r |
| 1019 | }\r |
| 1020 | \r |
| 1021 | Number = NC;\r |
| 1022 | while (Number > 0 && mCLen[Number - 1] == 0) {\r |
| 1023 | Number--;\r |
| 1024 | }\r |
| 1025 | \r |
| 1026 | Index = 0;\r |
| 1027 | while (Index < Number) {\r |
| 1028 | Index3 = mCLen[Index++];\r |
| 1029 | if (Index3 == 0) {\r |
| 1030 | Count = 1;\r |
| 1031 | while (Index < Number && mCLen[Index] == 0) {\r |
| 1032 | Index++;\r |
| 1033 | Count++;\r |
| 1034 | }\r |
| 1035 | \r |
| 1036 | if (Count <= 2) {\r |
| 1037 | mTFreq[0] = (UINT16) (mTFreq[0] + Count);\r |
| 1038 | } else if (Count <= 18) {\r |
| 1039 | mTFreq[1]++;\r |
| 1040 | } else if (Count == 19) {\r |
| 1041 | mTFreq[0]++;\r |
| 1042 | mTFreq[1]++;\r |
| 1043 | } else {\r |
| 1044 | mTFreq[2]++;\r |
| 1045 | }\r |
| 1046 | } else {\r |
| 1047 | mTFreq[Index3 + 2]++;\r |
| 1048 | }\r |
| 1049 | }\r |
| 1050 | }\r |
| 1051 | \r |
| 1052 | STATIC\r |
| 1053 | VOID\r |
| 1054 | WritePTLen (\r |
| 1055 | IN INT32 Number,\r |
| 1056 | IN INT32 nbit,\r |
| 1057 | IN INT32 Special\r |
| 1058 | )\r |
| 1059 | /*++\r |
| 1060 | \r |
| 1061 | Routine Description:\r |
| 1062 | \r |
| 1063 | Outputs the code length array for the Extra Set or the Position Set.\r |
| 1064 | \r |
| 1065 | Arguments:\r |
| 1066 | \r |
| 1067 | Number - the number of symbols\r |
| 1068 | nbit - the number of bits needed to represent 'n'\r |
| 1069 | Special - the special symbol that needs to be take care of\r |
| 1070 | \r |
| 1071 | Returns: (VOID)\r |
| 1072 | \r |
| 1073 | --*/\r |
| 1074 | {\r |
| 1075 | INT32 Index;\r |
| 1076 | INT32 Index3;\r |
| 1077 | \r |
| 1078 | while (Number > 0 && mPTLen[Number - 1] == 0) {\r |
| 1079 | Number--;\r |
| 1080 | }\r |
| 1081 | \r |
| 1082 | PutBits (nbit, Number);\r |
| 1083 | Index = 0;\r |
| 1084 | while (Index < Number) {\r |
| 1085 | Index3 = mPTLen[Index++];\r |
| 1086 | if (Index3 <= 6) {\r |
| 1087 | PutBits (3, Index3);\r |
| 1088 | } else {\r |
| 1089 | PutBits (Index3 - 3, (1U << (Index3 - 3)) - 2);\r |
| 1090 | }\r |
| 1091 | \r |
| 1092 | if (Index == Special) {\r |
| 1093 | while (Index < 6 && mPTLen[Index] == 0) {\r |
| 1094 | Index++;\r |
| 1095 | }\r |
| 1096 | \r |
| 1097 | PutBits (2, (Index - 3) & 3);\r |
| 1098 | }\r |
| 1099 | }\r |
| 1100 | }\r |
| 1101 | \r |
| 1102 | STATIC\r |
| 1103 | VOID\r |
| 1104 | WriteCLen (\r |
| 1105 | VOID\r |
| 1106 | )\r |
| 1107 | /*++\r |
| 1108 | \r |
| 1109 | Routine Description:\r |
| 1110 | \r |
| 1111 | Outputs the code length array for Char&Length Set\r |
| 1112 | \r |
| 1113 | Arguments: (VOID)\r |
| 1114 | \r |
| 1115 | Returns: (VOID)\r |
| 1116 | \r |
| 1117 | --*/\r |
| 1118 | {\r |
| 1119 | INT32 Index;\r |
| 1120 | INT32 Index3;\r |
| 1121 | INT32 Number;\r |
| 1122 | INT32 Count;\r |
| 1123 | \r |
| 1124 | Number = NC;\r |
| 1125 | while (Number > 0 && mCLen[Number - 1] == 0) {\r |
| 1126 | Number--;\r |
| 1127 | }\r |
| 1128 | \r |
| 1129 | PutBits (CBIT, Number);\r |
| 1130 | Index = 0;\r |
| 1131 | while (Index < Number) {\r |
| 1132 | Index3 = mCLen[Index++];\r |
| 1133 | if (Index3 == 0) {\r |
| 1134 | Count = 1;\r |
| 1135 | while (Index < Number && mCLen[Index] == 0) {\r |
| 1136 | Index++;\r |
| 1137 | Count++;\r |
| 1138 | }\r |
| 1139 | \r |
| 1140 | if (Count <= 2) {\r |
| 1141 | for (Index3 = 0; Index3 < Count; Index3++) {\r |
| 1142 | PutBits (mPTLen[0], mPTCode[0]);\r |
| 1143 | }\r |
| 1144 | } else if (Count <= 18) {\r |
| 1145 | PutBits (mPTLen[1], mPTCode[1]);\r |
| 1146 | PutBits (4, Count - 3);\r |
| 1147 | } else if (Count == 19) {\r |
| 1148 | PutBits (mPTLen[0], mPTCode[0]);\r |
| 1149 | PutBits (mPTLen[1], mPTCode[1]);\r |
| 1150 | PutBits (4, 15);\r |
| 1151 | } else {\r |
| 1152 | PutBits (mPTLen[2], mPTCode[2]);\r |
| 1153 | PutBits (CBIT, Count - 20);\r |
| 1154 | }\r |
| 1155 | } else {\r |
| 1156 | PutBits (mPTLen[Index3 + 2], mPTCode[Index3 + 2]);\r |
| 1157 | }\r |
| 1158 | }\r |
| 1159 | }\r |
| 1160 | \r |
| 1161 | STATIC\r |
| 1162 | VOID\r |
| 1163 | EncodeC (\r |
| 1164 | IN INT32 Value\r |
| 1165 | )\r |
| 1166 | {\r |
| 1167 | PutBits (mCLen[Value], mCCode[Value]);\r |
| 1168 | }\r |
| 1169 | \r |
| 1170 | STATIC\r |
| 1171 | VOID\r |
| 1172 | EncodeP (\r |
| 1173 | IN UINT32 Value\r |
| 1174 | )\r |
| 1175 | {\r |
| 1176 | UINT32 Index;\r |
| 1177 | UINT32 NodeQ;\r |
| 1178 | \r |
| 1179 | Index = 0;\r |
| 1180 | NodeQ = Value;\r |
| 1181 | while (NodeQ) {\r |
| 1182 | NodeQ >>= 1;\r |
| 1183 | Index++;\r |
| 1184 | }\r |
| 1185 | \r |
| 1186 | PutBits (mPTLen[Index], mPTCode[Index]);\r |
| 1187 | if (Index > 1) {\r |
| 1188 | PutBits (Index - 1, Value & (0xFFFFFFFFU >> (32 - Index + 1)));\r |
| 1189 | }\r |
| 1190 | }\r |
| 1191 | \r |
| 1192 | STATIC\r |
| 1193 | VOID\r |
| 1194 | SendBlock (\r |
| 1195 | VOID\r |
| 1196 | )\r |
| 1197 | /*++\r |
| 1198 | \r |
| 1199 | Routine Description:\r |
| 1200 | \r |
| 1201 | Huffman code the block and output it.\r |
| 1202 | \r |
| 1203 | Arguments: \r |
| 1204 | (VOID)\r |
| 1205 | \r |
| 1206 | Returns: \r |
| 1207 | (VOID)\r |
| 1208 | \r |
| 1209 | --*/\r |
| 1210 | {\r |
| 1211 | UINT32 Index;\r |
| 1212 | UINT32 Index2;\r |
| 1213 | UINT32 Index3;\r |
| 1214 | UINT32 Flags;\r |
| 1215 | UINT32 Root;\r |
| 1216 | UINT32 Pos;\r |
| 1217 | UINT32 Size;\r |
| 1218 | Flags = 0;\r |
| 1219 | \r |
| 1220 | Root = MakeTree (NC, mCFreq, mCLen, mCCode);\r |
| 1221 | Size = mCFreq[Root];\r |
| 1222 | PutBits (16, Size);\r |
| 1223 | if (Root >= NC) {\r |
| 1224 | CountTFreq ();\r |
| 1225 | Root = MakeTree (NT, mTFreq, mPTLen, mPTCode);\r |
| 1226 | if (Root >= NT) {\r |
| 1227 | WritePTLen (NT, TBIT, 3);\r |
| 1228 | } else {\r |
| 1229 | PutBits (TBIT, 0);\r |
| 1230 | PutBits (TBIT, Root);\r |
| 1231 | }\r |
| 1232 | \r |
| 1233 | WriteCLen ();\r |
| 1234 | } else {\r |
| 1235 | PutBits (TBIT, 0);\r |
| 1236 | PutBits (TBIT, 0);\r |
| 1237 | PutBits (CBIT, 0);\r |
| 1238 | PutBits (CBIT, Root);\r |
| 1239 | }\r |
| 1240 | \r |
| 1241 | Root = MakeTree (NP, mPFreq, mPTLen, mPTCode);\r |
| 1242 | if (Root >= NP) {\r |
| 1243 | WritePTLen (NP, PBIT, -1);\r |
| 1244 | } else {\r |
| 1245 | PutBits (PBIT, 0);\r |
| 1246 | PutBits (PBIT, Root);\r |
| 1247 | }\r |
| 1248 | \r |
| 1249 | Pos = 0;\r |
| 1250 | for (Index = 0; Index < Size; Index++) {\r |
| 1251 | if (Index % UINT8_BIT == 0) {\r |
| 1252 | Flags = mBuf[Pos++];\r |
| 1253 | } else {\r |
| 1254 | Flags <<= 1;\r |
| 1255 | }\r |
| 1256 | \r |
| 1257 | if (Flags & (1U << (UINT8_BIT - 1))) {\r |
| 1258 | EncodeC (mBuf[Pos++] + (1U << UINT8_BIT));\r |
| 1259 | Index3 = mBuf[Pos++];\r |
| 1260 | for (Index2 = 0; Index2 < 3; Index2++) {\r |
| 1261 | Index3 <<= UINT8_BIT;\r |
| 1262 | Index3 += mBuf[Pos++];\r |
| 1263 | }\r |
| 1264 | \r |
| 1265 | EncodeP (Index3);\r |
| 1266 | } else {\r |
| 1267 | EncodeC (mBuf[Pos++]);\r |
| 1268 | }\r |
| 1269 | }\r |
| 1270 | \r |
| 1271 | for (Index = 0; Index < NC; Index++) {\r |
| 1272 | mCFreq[Index] = 0;\r |
| 1273 | }\r |
| 1274 | \r |
| 1275 | for (Index = 0; Index < NP; Index++) {\r |
| 1276 | mPFreq[Index] = 0;\r |
| 1277 | }\r |
| 1278 | }\r |
| 1279 | \r |
| 1280 | STATIC\r |
| 1281 | VOID\r |
| 1282 | Output (\r |
| 1283 | IN UINT32 CharC,\r |
| 1284 | IN UINT32 Pos\r |
| 1285 | )\r |
| 1286 | /*++\r |
| 1287 | \r |
| 1288 | Routine Description:\r |
| 1289 | \r |
| 1290 | Outputs an Original Character or a Pointer\r |
| 1291 | \r |
| 1292 | Arguments:\r |
| 1293 | \r |
| 1294 | CharC - The original character or the 'String Length' element of a Pointer\r |
| 1295 | Pos - The 'Position' field of a Pointer\r |
| 1296 | \r |
| 1297 | Returns: (VOID)\r |
| 1298 | \r |
| 1299 | --*/\r |
| 1300 | {\r |
| 1301 | static UINT32 CPos;\r |
| 1302 | \r |
| 1303 | if ((mOutputMask >>= 1) == 0) {\r |
| 1304 | mOutputMask = 1U << (UINT8_BIT - 1);\r |
| 1305 | //\r |
| 1306 | // Check the buffer overflow per outputing UINT8_BIT symbols\r |
| 1307 | // which is an Original Character or a Pointer. The biggest\r |
| 1308 | // symbol is a Pointer which occupies 5 bytes.\r |
| 1309 | //\r |
| 1310 | if (mOutputPos >= mBufSiz - 5 * UINT8_BIT) {\r |
| 1311 | SendBlock ();\r |
| 1312 | mOutputPos = 0;\r |
| 1313 | }\r |
| 1314 | \r |
| 1315 | CPos = mOutputPos++;\r |
| 1316 | mBuf[CPos] = 0;\r |
| 1317 | }\r |
| 1318 | \r |
| 1319 | mBuf[mOutputPos++] = (UINT8) CharC;\r |
| 1320 | mCFreq[CharC]++;\r |
| 1321 | if (CharC >= (1U << UINT8_BIT)) {\r |
| 1322 | mBuf[CPos] |= mOutputMask;\r |
| 1323 | mBuf[mOutputPos++] = (UINT8) (Pos >> 24);\r |
| 1324 | mBuf[mOutputPos++] = (UINT8) (Pos >> 16);\r |
| 1325 | mBuf[mOutputPos++] = (UINT8) (Pos >> (UINT8_BIT));\r |
| 1326 | mBuf[mOutputPos++] = (UINT8) Pos;\r |
| 1327 | CharC = 0;\r |
| 1328 | while (Pos) {\r |
| 1329 | Pos >>= 1;\r |
| 1330 | CharC++;\r |
| 1331 | }\r |
| 1332 | \r |
| 1333 | mPFreq[CharC]++;\r |
| 1334 | }\r |
| 1335 | }\r |
| 1336 | \r |
| 1337 | STATIC\r |
| 1338 | VOID\r |
| 1339 | HufEncodeStart (\r |
| 1340 | VOID\r |
| 1341 | )\r |
| 1342 | {\r |
| 1343 | INT32 Index;\r |
| 1344 | \r |
| 1345 | for (Index = 0; Index < NC; Index++) {\r |
| 1346 | mCFreq[Index] = 0;\r |
| 1347 | }\r |
| 1348 | \r |
| 1349 | for (Index = 0; Index < NP; Index++) {\r |
| 1350 | mPFreq[Index] = 0;\r |
| 1351 | }\r |
| 1352 | \r |
| 1353 | mOutputPos = mOutputMask = 0;\r |
| 1354 | InitPutBits ();\r |
| 1355 | return ;\r |
| 1356 | }\r |
| 1357 | \r |
| 1358 | STATIC\r |
| 1359 | VOID\r |
| 1360 | HufEncodeEnd (\r |
| 1361 | VOID\r |
| 1362 | )\r |
| 1363 | {\r |
| 1364 | SendBlock ();\r |
| 1365 | \r |
| 1366 | //\r |
| 1367 | // Flush remaining bits\r |
| 1368 | //\r |
| 1369 | PutBits (UINT8_BIT - 1, 0);\r |
| 1370 | \r |
| 1371 | return ;\r |
| 1372 | }\r |
| 1373 | \r |
| 1374 | STATIC\r |
| 1375 | VOID\r |
| 1376 | MakeCrcTable (\r |
| 1377 | VOID\r |
| 1378 | )\r |
| 1379 | {\r |
| 1380 | UINT32 Index;\r |
| 1381 | UINT32 Index2;\r |
| 1382 | UINT32 Temp;\r |
| 1383 | \r |
| 1384 | for (Index = 0; Index <= UINT8_MAX; Index++) {\r |
| 1385 | Temp = Index;\r |
| 1386 | for (Index2 = 0; Index2 < UINT8_BIT; Index2++) {\r |
| 1387 | if (Temp & 1) {\r |
| 1388 | Temp = (Temp >> 1) ^ CRCPOLY;\r |
| 1389 | } else {\r |
| 1390 | Temp >>= 1;\r |
| 1391 | }\r |
| 1392 | }\r |
| 1393 | \r |
| 1394 | mCrcTable[Index] = (UINT16) Temp;\r |
| 1395 | }\r |
| 1396 | }\r |
| 1397 | \r |
| 1398 | STATIC\r |
| 1399 | VOID\r |
| 1400 | PutBits (\r |
| 1401 | IN INT32 Number,\r |
| 1402 | IN UINT32 Value\r |
| 1403 | )\r |
| 1404 | /*++\r |
| 1405 | \r |
| 1406 | Routine Description:\r |
| 1407 | \r |
| 1408 | Outputs rightmost n bits of x\r |
| 1409 | \r |
| 1410 | Arguments:\r |
| 1411 | \r |
| 1412 | Number - the rightmost n bits of the data is used\r |
| 1413 | x - the data \r |
| 1414 | \r |
| 1415 | Returns: (VOID)\r |
| 1416 | \r |
| 1417 | --*/\r |
| 1418 | {\r |
| 1419 | UINT8 Temp;\r |
| 1420 | \r |
| 1421 | while (Number >= mBitCount) {\r |
| 1422 | //\r |
| 1423 | // Number -= mBitCount should never equal to 32\r |
| 1424 | //\r |
| 1425 | Temp = (UINT8) (mSubBitBuf | (Value >> (Number -= mBitCount)));\r |
| 1426 | if (mDst < mDstUpperLimit) {\r |
| 1427 | *mDst++ = Temp;\r |
| 1428 | }\r |
| 1429 | \r |
| 1430 | mCompSize++;\r |
| 1431 | mSubBitBuf = 0;\r |
| 1432 | mBitCount = UINT8_BIT;\r |
| 1433 | }\r |
| 1434 | \r |
| 1435 | mSubBitBuf |= Value << (mBitCount -= Number);\r |
| 1436 | }\r |
| 1437 | \r |
| 1438 | STATIC\r |
| 1439 | INT32\r |
| 1440 | FreadCrc (\r |
| 1441 | OUT UINT8 *Pointer,\r |
| 1442 | IN INT32 Number\r |
| 1443 | )\r |
| 1444 | /*++\r |
| 1445 | \r |
| 1446 | Routine Description:\r |
| 1447 | \r |
| 1448 | Read in source data\r |
| 1449 | \r |
| 1450 | Arguments:\r |
| 1451 | \r |
| 1452 | Pointer - the buffer to hold the data\r |
| 1453 | Number - number of bytes to read\r |
| 1454 | \r |
| 1455 | Returns:\r |
| 1456 | \r |
| 1457 | number of bytes actually read\r |
| 1458 | \r |
| 1459 | --*/\r |
| 1460 | {\r |
| 1461 | INT32 Index;\r |
| 1462 | \r |
| 1463 | for (Index = 0; mSrc < mSrcUpperLimit && Index < Number; Index++) {\r |
| 1464 | *Pointer++ = *mSrc++;\r |
| 1465 | }\r |
| 1466 | \r |
| 1467 | Number = Index;\r |
| 1468 | \r |
| 1469 | Pointer -= Number;\r |
| 1470 | mOrigSize += Number;\r |
| 1471 | Index--;\r |
| 1472 | while (Index >= 0) {\r |
| 1473 | UPDATE_CRC (*Pointer++);\r |
| 1474 | Index--;\r |
| 1475 | }\r |
| 1476 | \r |
| 1477 | return Number;\r |
| 1478 | }\r |
| 1479 | \r |
| 1480 | STATIC\r |
| 1481 | VOID\r |
| 1482 | InitPutBits (\r |
| 1483 | VOID\r |
| 1484 | )\r |
| 1485 | {\r |
| 1486 | mBitCount = UINT8_BIT;\r |
| 1487 | mSubBitBuf = 0;\r |
| 1488 | }\r |
| 1489 | \r |
| 1490 | STATIC\r |
| 1491 | VOID\r |
| 1492 | CountLen (\r |
| 1493 | IN INT32 Index\r |
| 1494 | )\r |
| 1495 | /*++\r |
| 1496 | \r |
| 1497 | Routine Description:\r |
| 1498 | \r |
| 1499 | Count the number of each code length for a Huffman tree.\r |
| 1500 | \r |
| 1501 | Arguments:\r |
| 1502 | \r |
| 1503 | Index - the top node\r |
| 1504 | \r |
| 1505 | Returns: (VOID)\r |
| 1506 | \r |
| 1507 | --*/\r |
| 1508 | {\r |
| 1509 | static INT32 Depth = 0;\r |
| 1510 | \r |
| 1511 | if (Index < mN) {\r |
| 1512 | mLenCnt[(Depth < 16) ? Depth : 16]++;\r |
| 1513 | } else {\r |
| 1514 | Depth++;\r |
| 1515 | CountLen (mLeft[Index]);\r |
| 1516 | CountLen (mRight[Index]);\r |
| 1517 | Depth--;\r |
| 1518 | }\r |
| 1519 | }\r |
| 1520 | \r |
| 1521 | STATIC\r |
| 1522 | VOID\r |
| 1523 | MakeLen (\r |
| 1524 | IN INT32 Root\r |
| 1525 | )\r |
| 1526 | /*++\r |
| 1527 | \r |
| 1528 | Routine Description:\r |
| 1529 | \r |
| 1530 | Create code length array for a Huffman tree\r |
| 1531 | \r |
| 1532 | Arguments:\r |
| 1533 | \r |
| 1534 | Root - the root of the tree\r |
| 1535 | \r |
| 1536 | Returns:\r |
| 1537 | \r |
| 1538 | VOID\r |
| 1539 | \r |
| 1540 | --*/\r |
| 1541 | {\r |
| 1542 | INT32 Index;\r |
| 1543 | INT32 Index3;\r |
| 1544 | UINT32 Cum;\r |
| 1545 | \r |
| 1546 | for (Index = 0; Index <= 16; Index++) {\r |
| 1547 | mLenCnt[Index] = 0;\r |
| 1548 | }\r |
| 1549 | \r |
| 1550 | CountLen (Root);\r |
| 1551 | \r |
| 1552 | //\r |
| 1553 | // Adjust the length count array so that\r |
| 1554 | // no code will be generated longer than its designated length\r |
| 1555 | //\r |
| 1556 | Cum = 0;\r |
| 1557 | for (Index = 16; Index > 0; Index--) {\r |
| 1558 | Cum += mLenCnt[Index] << (16 - Index);\r |
| 1559 | }\r |
| 1560 | \r |
| 1561 | while (Cum != (1U << 16)) {\r |
| 1562 | mLenCnt[16]--;\r |
| 1563 | for (Index = 15; Index > 0; Index--) {\r |
| 1564 | if (mLenCnt[Index] != 0) {\r |
| 1565 | mLenCnt[Index]--;\r |
| 1566 | mLenCnt[Index + 1] += 2;\r |
| 1567 | break;\r |
| 1568 | }\r |
| 1569 | }\r |
| 1570 | \r |
| 1571 | Cum--;\r |
| 1572 | }\r |
| 1573 | \r |
| 1574 | for (Index = 16; Index > 0; Index--) {\r |
| 1575 | Index3 = mLenCnt[Index];\r |
| 1576 | Index3--;\r |
| 1577 | while (Index3 >= 0) {\r |
| 1578 | mLen[*mSortPtr++] = (UINT8) Index;\r |
| 1579 | Index3--;\r |
| 1580 | }\r |
| 1581 | }\r |
| 1582 | }\r |
| 1583 | \r |
| 1584 | STATIC\r |
| 1585 | VOID\r |
| 1586 | DownHeap (\r |
| 1587 | IN INT32 Index\r |
| 1588 | )\r |
| 1589 | {\r |
| 1590 | INT32 Index2;\r |
| 1591 | INT32 Index3;\r |
| 1592 | \r |
| 1593 | //\r |
| 1594 | // priority queue: send Index-th entry down heap\r |
| 1595 | //\r |
| 1596 | Index3 = mHeap[Index];\r |
| 1597 | Index2 = 2 * Index;\r |
| 1598 | while (Index2 <= mHeapSize) {\r |
| 1599 | if (Index2 < mHeapSize && mFreq[mHeap[Index2]] > mFreq[mHeap[Index2 + 1]]) {\r |
| 1600 | Index2++;\r |
| 1601 | }\r |
| 1602 | \r |
| 1603 | if (mFreq[Index3] <= mFreq[mHeap[Index2]]) {\r |
| 1604 | break;\r |
| 1605 | }\r |
| 1606 | \r |
| 1607 | mHeap[Index] = mHeap[Index2];\r |
| 1608 | Index = Index2;\r |
| 1609 | Index2 = 2 * Index;\r |
| 1610 | }\r |
| 1611 | \r |
| 1612 | mHeap[Index] = (INT16) Index3;\r |
| 1613 | }\r |
| 1614 | \r |
| 1615 | STATIC\r |
| 1616 | VOID\r |
| 1617 | MakeCode (\r |
| 1618 | IN INT32 Number,\r |
| 1619 | IN UINT8 Len[ ],\r |
| 1620 | OUT UINT16 Code[]\r |
| 1621 | )\r |
| 1622 | /*++\r |
| 1623 | \r |
| 1624 | Routine Description:\r |
| 1625 | \r |
| 1626 | Assign code to each symbol based on the code length array\r |
| 1627 | \r |
| 1628 | Arguments:\r |
| 1629 | \r |
| 1630 | Number - number of symbols\r |
| 1631 | Len - the code length array\r |
| 1632 | Code - stores codes for each symbol\r |
| 1633 | \r |
| 1634 | Returns: (VOID)\r |
| 1635 | \r |
| 1636 | --*/\r |
| 1637 | {\r |
| 1638 | INT32 Index;\r |
| 1639 | UINT16 Start[18];\r |
| 1640 | \r |
| 1641 | Start[1] = 0;\r |
| 1642 | for (Index = 1; Index <= 16; Index++) {\r |
| 1643 | Start[Index + 1] = (UINT16) ((Start[Index] + mLenCnt[Index]) << 1);\r |
| 1644 | }\r |
| 1645 | \r |
| 1646 | for (Index = 0; Index < Number; Index++) {\r |
| 1647 | Code[Index] = Start[Len[Index]]++;\r |
| 1648 | }\r |
| 1649 | }\r |
| 1650 | \r |
| 1651 | STATIC\r |
| 1652 | INT32\r |
| 1653 | MakeTree (\r |
| 1654 | IN INT32 NParm,\r |
| 1655 | IN UINT16 FreqParm[],\r |
| 1656 | OUT UINT8 LenParm[ ],\r |
| 1657 | OUT UINT16 CodeParm[]\r |
| 1658 | )\r |
| 1659 | /*++\r |
| 1660 | \r |
| 1661 | Routine Description:\r |
| 1662 | \r |
| 1663 | Generates Huffman codes given a frequency distribution of symbols\r |
| 1664 | \r |
| 1665 | Arguments:\r |
| 1666 | \r |
| 1667 | NParm - number of symbols\r |
| 1668 | FreqParm - frequency of each symbol\r |
| 1669 | LenParm - code length for each symbol\r |
| 1670 | CodeParm - code for each symbol\r |
| 1671 | \r |
| 1672 | Returns:\r |
| 1673 | \r |
| 1674 | Root of the Huffman tree.\r |
| 1675 | \r |
| 1676 | --*/\r |
| 1677 | {\r |
| 1678 | INT32 Index;\r |
| 1679 | INT32 Index2;\r |
| 1680 | INT32 Index3;\r |
| 1681 | INT32 Avail;\r |
| 1682 | \r |
| 1683 | //\r |
| 1684 | // make tree, calculate len[], return root\r |
| 1685 | //\r |
| 1686 | mN = NParm;\r |
| 1687 | mFreq = FreqParm;\r |
| 1688 | mLen = LenParm;\r |
| 1689 | Avail = mN;\r |
| 1690 | mHeapSize = 0;\r |
| 1691 | mHeap[1] = 0;\r |
| 1692 | for (Index = 0; Index < mN; Index++) {\r |
| 1693 | mLen[Index] = 0;\r |
| 1694 | if (mFreq[Index]) {\r |
| 1695 | mHeapSize++;\r |
| 1696 | mHeap[mHeapSize] = (INT16) Index;\r |
| 1697 | }\r |
| 1698 | }\r |
| 1699 | \r |
| 1700 | if (mHeapSize < 2) {\r |
| 1701 | CodeParm[mHeap[1]] = 0;\r |
| 1702 | return mHeap[1];\r |
| 1703 | }\r |
| 1704 | \r |
| 1705 | for (Index = mHeapSize / 2; Index >= 1; Index--) {\r |
| 1706 | //\r |
| 1707 | // make priority queue\r |
| 1708 | //\r |
| 1709 | DownHeap (Index);\r |
| 1710 | }\r |
| 1711 | \r |
| 1712 | mSortPtr = CodeParm;\r |
| 1713 | do {\r |
| 1714 | Index = mHeap[1];\r |
| 1715 | if (Index < mN) {\r |
| 1716 | *mSortPtr++ = (UINT16) Index;\r |
| 1717 | }\r |
| 1718 | \r |
| 1719 | mHeap[1] = mHeap[mHeapSize--];\r |
| 1720 | DownHeap (1);\r |
| 1721 | Index2 = mHeap[1];\r |
| 1722 | if (Index2 < mN) {\r |
| 1723 | *mSortPtr++ = (UINT16) Index2;\r |
| 1724 | }\r |
| 1725 | \r |
| 1726 | Index3 = Avail++;\r |
| 1727 | mFreq[Index3] = (UINT16) (mFreq[Index] + mFreq[Index2]);\r |
| 1728 | mHeap[1] = (INT16) Index3;\r |
| 1729 | DownHeap (1);\r |
| 1730 | mLeft[Index3] = (UINT16) Index;\r |
| 1731 | mRight[Index3] = (UINT16) Index2;\r |
| 1732 | } while (mHeapSize > 1);\r |
| 1733 | \r |
| 1734 | mSortPtr = CodeParm;\r |
| 1735 | MakeLen (Index3);\r |
| 1736 | MakeCode (NParm, LenParm, CodeParm);\r |
| 1737 | \r |
| 1738 | //\r |
| 1739 | // return root\r |
| 1740 | //\r |
| 1741 | return Index3;\r |
| 1742 | }\r |
projects / mirror_edk2.git / blame