| 527 | } |
| 528 | |
| 529 | STATIC |
| 530 | UINT16 |
| 531 | DecodeC ( |
| 532 | SCRATCH_DATA *Sd |
| 533 | ) |
| 534 | /*++ |
| 535 | |
| 536 | Routine Description: |
| 537 | |
| 538 | Decode a character/length value. |
| 539 | |
| 540 | Arguments: |
| 541 | |
| 542 | Sd - The global scratch data. |
| 543 | |
| 544 | Returns: |
| 545 | |
| 546 | The value decoded. |
| 547 | |
| 548 | --*/ |
| 549 | { |
| 550 | UINT16 Index2; |
| 551 | UINT32 Mask; |
| 552 | |
| 553 | if (Sd->mBlockSize == 0) { |
| 554 | // |
| 555 | // Starting a new block |
| 556 | // |
| 557 | Sd->mBlockSize = (UINT16) GetBits (Sd, 16); |
| 558 | Sd->mBadTableFlag = ReadPTLen (Sd, NT, TBIT, 3); |
| 559 | if (Sd->mBadTableFlag != 0) { |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | ReadCLen (Sd); |
| 564 | |
| 565 | Sd->mBadTableFlag = ReadPTLen (Sd, MAXNP, mPbit, (UINT16) (-1)); |
| 566 | if (Sd->mBadTableFlag != 0) { |
| 567 | return 0; |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | Sd->mBlockSize--; |
| 572 | Index2 = Sd->mCTable[Sd->mBitBuf >> (BITBUFSIZ - 12)]; |
| 573 | |
| 574 | if (Index2 >= NC) { |
| 575 | Mask = 1U << (BITBUFSIZ - 1 - 12); |
| 576 | |
| 577 | do { |
| 578 | if (Sd->mBitBuf & Mask) { |
| 579 | Index2 = Sd->mRight[Index2]; |
| 580 | } else { |
| 581 | Index2 = Sd->mLeft[Index2]; |
| 582 | } |
| 583 | |
| 584 | Mask >>= 1; |
| 585 | } while (Index2 >= NC); |
| 586 | } |