1013 lines
26 KiB
C
1013 lines
26 KiB
C
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/*++
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Copyright (c) 1991-1999, Microsoft Corporation All rights reserved.
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Module Name:
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table.c
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Abstract:
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This file contains functions necessary to manipulate the various
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table structures.
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External Routines in this file:
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ComputeMBSize
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Compute844Size
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ComputeCTMapSize
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Write844Table
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Write844TableMap
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WriteCTMapTable
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WriteWords
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FileWrite
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RemoveDuplicate844Levels
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Revision History:
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06-14-91 JulieB Created.
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--*/
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//
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// Include Files.
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//
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#include "nlstrans.h"
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//
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// Constant Declarations.
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//
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#define HASH_SIZE 65521 // size of hash table (prime #)
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//
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// Typedef Declarations.
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//
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typedef struct hash_object_s
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{
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PVOID pTable; // ptr to table
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struct hash_object_s *pNext; // ptr to next hash node
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} CT_HASH_OBJECT, *PCT_HASH_OBJECT;
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//
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// Forward Declarations.
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//
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void
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RemoveDuplicate844Level2(
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P844_ARRAY pArr,
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int *pBuf2);
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void
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RemoveDuplicate844Level3(
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P844_ARRAY pArr,
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int *pBuf3,
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int Size);
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PVOID
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FindHashTable(
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PVOID pTbl,
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PCT_HASH_OBJECT *pHashTbl,
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int Size);
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DWORD
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GetHashVal(
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PVOID pTbl,
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int Size);
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void
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FreeHashTable(
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PCT_HASH_OBJECT *pHashTbl);
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//-------------------------------------------------------------------------//
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// EXTERNAL ROUTINES //
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//-------------------------------------------------------------------------//
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////////////////////////////////////////////////////////////////////////////
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//
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// ComputeMBSize
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//
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// This routine returns the size (in words) of the MB, Glyph, and DBCS
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// tables.
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//
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// 07-30-91 JulieB Created.
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// 12-10-91 JulieB Modified for new table format.
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////////////////////////////////////////////////////////////////////////////
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int ComputeMBSize(
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PCODEPAGE pCP)
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{
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int TblSize; // size of table
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int Ctr; // loop counter
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register int NumRanges; // number of DBCS ranges
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PDBCS_ARRAY pArray; // ptr to DBCS array
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//
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// Compute static size of table.
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//
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if (pCP->WriteFlags & F_GLYPH)
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{
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TblSize = 1 + MB_TABLE_SIZE + (1 + GLYPH_TABLE_SIZE) + 1;
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}
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else
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{
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TblSize = 1 + MB_TABLE_SIZE + (1) + 1;
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}
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//
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// Compute size with DBCS tables (if any).
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//
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NumRanges = pCP->NumDBCSRanges;
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if ((NumRanges > 0) && (pCP->WriteFlags & F_DBCS))
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{
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TblSize += DBCS_OFFSET_SIZE;
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pArray = pCP->pDBCS;
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for (Ctr = 0; Ctr < NumRanges; Ctr++)
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{
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TblSize += ((pArray[Ctr]->HighRange -
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pArray[Ctr]->LowRange + 1) * DBCS_TABLE_SIZE);
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}
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}
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if (Verbose)
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printf(" Complete MB Table Size = %d\n", TblSize);
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//
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// Return the table size.
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//
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return (TblSize);
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}
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////////////////////////////////////////////////////////////////////////////
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//
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// Compute844Size
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//
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// This routine returns the size (in words) of the 8:4:4 WORD or DWORD
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// table.
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//
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// 07-30-91 JulieB Created.
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////////////////////////////////////////////////////////////////////////////
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int Compute844Size(
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int cbBuf2,
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int cbBuf3,
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int Size)
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{
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int TblSize; // size of table
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//
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// Adjust size of cbBuf2 and cbBuf3 for the two empty levels.
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//
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cbBuf2++;
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cbBuf3++;
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//
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// Compute size of table.
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//
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TblSize = TABLE_SIZE_8 +
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(TABLE_SIZE_4 * cbBuf2) +
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(TABLE_SIZE_4 * cbBuf3 * Size / sizeof(WORD));
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if (Verbose)
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printf(" 844 Table Size = %d\t\tBuf2 = %d\tBuf3 = %d\n",
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TblSize, cbBuf2, cbBuf3);
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//
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// Return the table size.
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//
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return (TblSize);
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}
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////////////////////////////////////////////////////////////////////////////
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//
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// ComputeCTMapSize
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//
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// This routine returns the size of the ctype mapping table.
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//
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////////////////////////////////////////////////////////////////////////////
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DWORD ComputeCTMapSize(
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PCT_MAP pMap)
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{
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DWORD TblSize; // size of table
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//
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// Compute size of table.
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//
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TblSize = sizeof(WORD) + (pMap->Length * sizeof(CT_VALUES));
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if (Verbose)
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printf(" Mapping Table Size = %d\n", TblSize);
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//
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// Return the table size.
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//
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return (TblSize);
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}
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////////////////////////////////////////////////////////////////////////////
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//
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// Write844Table
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//
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// This routine writes the 8:4:4 WORD table to the output file.
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//
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// 07-30-91 JulieB Created.
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////////////////////////////////////////////////////////////////////////////
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int Write844Table(
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FILE *pOutputFile,
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P844_ARRAY pArr,
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int cbBuf2,
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int TblSize,
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int Size)
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{
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WORD EmptyLevel2Offset; // empty level 2 offset
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WORD EmptyLevel3Offset; // empty level 3 offset
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WORD Pos2; // position array 2
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WORD Pos3; // position array 3
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WORD PosTemp2 = TABLE_SIZE_4; // position in pTemp2
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WORD *pTemp; // temporary storage
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PVOID pTemp2; // temporary storage
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DWORD Ctr, Ctr2, Ctr3; // loop counters
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P844_ARRAY ptr2; // ptr to second array
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P844_ARRAY ptr3; // ptr to third array
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//
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// Need to adjust cbBuf2 for the empty level 2 table.
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// TblSize was already adjusted for the empty level tables
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// in Compute844Size.
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//
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cbBuf2++;
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//
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// Set up the position offsets and the empty second and third level
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// table offsets. All Unicode characters that have no mappings will
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// point to the empty tables. Grab the first table in the second
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// level tables (offset TABLE_SIZE_8 in pTemp) and the first table in
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// the third level tables (offset TABLE_SIZE_8 + (cbBuf2 * TABLE_SIZE_4))
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// for the empty tables.
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//
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EmptyLevel2Offset = TABLE_SIZE_8;
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Pos2 = EmptyLevel2Offset + TABLE_SIZE_4;
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EmptyLevel3Offset = TABLE_SIZE_8 + (cbBuf2 * TABLE_SIZE_4);
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Pos3 = EmptyLevel3Offset + (TABLE_SIZE_4 * Size / sizeof(WORD));
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//
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// Allocate temporary storage buffers.
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//
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if (AllocateTemp844( &pTemp,
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EmptyLevel3Offset,
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sizeof(WORD) ))
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{
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return (1);
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}
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if (AllocateTemp844( &pTemp2,
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TblSize - EmptyLevel3Offset,
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Size ))
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{
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return (1);
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}
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//
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// Set up the empty second level table to point to the empty third
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// level table.
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//
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for (Ctr2 = 0; Ctr2 < TABLE_SIZE_4; Ctr2++)
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{
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pTemp[EmptyLevel2Offset + Ctr2] = EmptyLevel3Offset;
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}
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//
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// For each entry in the array, copy the appropriate offsets
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// to the storage buffer.
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//
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for (Ctr = 0; Ctr < TABLE_SIZE_8; Ctr++)
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{
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if ((ptr2 = (P844_ARRAY)(pArr[Ctr])) != NULL)
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{
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pTemp[Ctr] = Pos2;
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for (Ctr2 = 0; Ctr2 < TABLE_SIZE_4; Ctr2++)
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{
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if ((ptr3 = ptr2[Ctr2]) != NULL)
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{
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pTemp[Pos2 + Ctr2] = Pos3;
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for (Ctr3 = 0; Ctr3 < TABLE_SIZE_4; Ctr3++)
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{
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memcpy( ((BYTE *)pTemp2) + ((PosTemp2 + Ctr3) * Size),
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((BYTE *)ptr3) + (Ctr3 * Size),
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Size );
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}
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//
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// When advancing the Pos3 counter, must compensate
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// for the Size (multiply by 2 for DWORD).
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//
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Pos3 += (TABLE_SIZE_4 * Size / sizeof(WORD));
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PosTemp2 += TABLE_SIZE_4;
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}
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else
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{
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pTemp[Pos2 + Ctr2] = EmptyLevel3Offset;
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}
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}
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Pos2 += TABLE_SIZE_4;
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}
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else
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{
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pTemp[Ctr] = EmptyLevel2Offset;
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}
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}
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//
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// Write temp storage buffers to output file.
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//
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if (FileWrite( pOutputFile,
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pTemp,
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sizeof(WORD),
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Pos2,
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"8:4:4 buffer" ))
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{
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return (1);
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}
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if (FileWrite( pOutputFile,
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pTemp2,
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Size,
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PosTemp2,
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"8:4:4 buffer" ))
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{
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return (1);
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}
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//
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// Return success.
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//
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return (0);
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}
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////////////////////////////////////////////////////////////////////////////
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//
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// Write844TableMap
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//
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// This routine writes the 8:4:4 BYTE "mapped" table to the output file.
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//
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// 10-29-93 JulieB Created.
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////////////////////////////////////////////////////////////////////////////
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int Write844TableMap(
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FILE *pOutputFile,
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P844_ARRAY pArr,
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WORD TblSize)
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{
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WORD EmptyLevel2Offset; // empty level 2 offset
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WORD EmptyLevel3Offset; // empty level 3 offset
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WORD Pos; // position level 2 & 3
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WORD *pTemp2; // temporary storage - level 2
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BYTE *pTempTbl; // temporary storage - entire table
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DWORD Ctr, Ctr2, Ctr3; // loop counters
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P844_ARRAY ptr2; // ptr to second array
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PCT_MAP_VALUE ptr3; // ptr to third array
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//
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// Set up the second and third level empty tables.
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//
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EmptyLevel3Offset = (TABLE_SIZE_8 * sizeof(WORD));
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EmptyLevel2Offset = EmptyLevel3Offset + (TABLE_SIZE_4 * sizeof(BYTE));
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//
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// Set up position offset for the regular second and third level
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// tables.
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//
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Pos = EmptyLevel2Offset + (TABLE_SIZE_4 * sizeof(WORD));
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//
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// Allocate temporary storage buffers.
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//
|
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if (AllocateTemp844( &pTemp2,
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TABLE_SIZE_4,
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sizeof(WORD) ))
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|
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{
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return (1);
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}
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||
|
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if (AllocateTemp844( &pTempTbl,
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TblSize,
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sizeof(BYTE) ))
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||
|
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{
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||
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return (1);
|
||
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}
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||
|
|
|
||
|
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//
|
||
|
|
// Set up the empty second level table to point to the empty third
|
||
|
|
// level table.
|
||
|
|
//
|
||
|
|
for (Ctr = 0; Ctr < TABLE_SIZE_4; Ctr++)
|
||
|
|
{
|
||
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pTemp2[Ctr] = EmptyLevel3Offset;
|
||
|
|
}
|
||
|
|
memcpy( &pTempTbl[EmptyLevel2Offset],
|
||
|
|
pTemp2,
|
||
|
|
TABLE_SIZE_4 * sizeof(WORD) );
|
||
|
|
|
||
|
|
//
|
||
|
|
// For each entry in the array, copy the appropriate offsets
|
||
|
|
// to the storage buffers.
|
||
|
|
//
|
||
|
|
for (Ctr = 0; Ctr < TABLE_SIZE_8; Ctr++)
|
||
|
|
{
|
||
|
|
if ((ptr2 = (P844_ARRAY)(pArr[Ctr])) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// See if the table is a duplicate.
|
||
|
|
//
|
||
|
|
if (ptr2[DUPLICATE_OFFSET] != 0)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Table IS a duplicate, so just save the offset.
|
||
|
|
//
|
||
|
|
((WORD *)pTempTbl)[Ctr] = (WORD)(ptr2[DUPLICATE_OFFSET]);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set the duplicate pointer to null in the previous level,
|
||
|
|
// so that freeing of the 844 table is simpler.
|
||
|
|
//
|
||
|
|
pArr[Ctr] = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Table is NOT a duplicate.
|
||
|
|
// Copy it and save the position for use later if
|
||
|
|
// it's a duplicate.
|
||
|
|
//
|
||
|
|
for (Ctr2 = 0; Ctr2 < TABLE_SIZE_4; Ctr2++)
|
||
|
|
{
|
||
|
|
if ((ptr3 = ptr2[Ctr2]) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// See if the table is a duplicate.
|
||
|
|
//
|
||
|
|
if (*(WORD *)(ptr3 + DUPLICATE_OFFSET) != 0)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Table IS a duplicate, so just save the
|
||
|
|
// offset.
|
||
|
|
//
|
||
|
|
pTemp2[Ctr2] = *(WORD *)(ptr3 + DUPLICATE_OFFSET);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set the duplicate pointer to null in the
|
||
|
|
// previous level, so that freeing of the
|
||
|
|
// 844 table is simpler.
|
||
|
|
//
|
||
|
|
ptr2[Ctr2] = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Table is NOT yet a duplicate.
|
||
|
|
// Save the position in case this third
|
||
|
|
// level table is used again.
|
||
|
|
//
|
||
|
|
*(WORD *)(ptr3 + DUPLICATE_OFFSET) = Pos;
|
||
|
|
pTemp2[Ctr2] = Pos;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Copy the third level table to the buffer
|
||
|
|
// and update the position counter.
|
||
|
|
//
|
||
|
|
for (Ctr3 = 0; Ctr3 < TABLE_SIZE_4; Ctr3++)
|
||
|
|
{
|
||
|
|
pTempTbl[Pos + Ctr3] = ptr3[Ctr3];
|
||
|
|
}
|
||
|
|
|
||
|
|
Pos += TABLE_SIZE_4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pTemp2[Ctr2] = EmptyLevel3Offset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Save the position in case this second level table is
|
||
|
|
// used again.
|
||
|
|
//
|
||
|
|
(WORD)ptr2[DUPLICATE_OFFSET] = Pos;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Copy the second level table to the buffer,
|
||
|
|
// update the first level table with the position of
|
||
|
|
// the second level table, and update the position
|
||
|
|
// counter.
|
||
|
|
//
|
||
|
|
memcpy( &pTempTbl[Pos],
|
||
|
|
pTemp2,
|
||
|
|
TABLE_SIZE_4 * sizeof(WORD) );
|
||
|
|
|
||
|
|
((WORD *)pTempTbl)[Ctr] = Pos;
|
||
|
|
|
||
|
|
Pos += (TABLE_SIZE_4 * sizeof(WORD));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
((WORD *)pTempTbl)[Ctr] = EmptyLevel2Offset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Write temp storage buffers to output file.
|
||
|
|
//
|
||
|
|
if (FileWrite( pOutputFile,
|
||
|
|
pTempTbl,
|
||
|
|
sizeof(BYTE),
|
||
|
|
TblSize,
|
||
|
|
"8:4:4 buffer" ))
|
||
|
|
{
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return success.
|
||
|
|
//
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// WriteCTMapTable
|
||
|
|
//
|
||
|
|
// This routine writes the ctype mapping table to the output file.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
int WriteCTMapTable(
|
||
|
|
FILE *pOutputFile,
|
||
|
|
PCT_MAP pMap,
|
||
|
|
WORD MapSize)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Write the size of the mapping table.
|
||
|
|
//
|
||
|
|
if (FileWrite( pOutputFile,
|
||
|
|
&MapSize,
|
||
|
|
sizeof(WORD),
|
||
|
|
1,
|
||
|
|
"Mapping Table size" ))
|
||
|
|
{
|
||
|
|
fclose(pOutputFile);
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Write mapping table to output file.
|
||
|
|
//
|
||
|
|
if (FileWrite( pOutputFile,
|
||
|
|
pMap->pCTValues,
|
||
|
|
MapSize - sizeof(WORD),
|
||
|
|
1,
|
||
|
|
"Mapping Table buffer" ))
|
||
|
|
{
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return success.
|
||
|
|
//
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// WriteWords
|
||
|
|
//
|
||
|
|
// This routine writes multiple words of the same value to the output file.
|
||
|
|
// The number of values written is determined by the Num parameter.
|
||
|
|
//
|
||
|
|
// 07-30-91 JulieB Created.
|
||
|
|
// 12-10-91 JulieB Modified for new table format.
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
int WriteWords(
|
||
|
|
FILE *pOutputFile,
|
||
|
|
WORD Value,
|
||
|
|
int Num)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Write the given 'Value' as a WORD 'Num' times to the output file.
|
||
|
|
//
|
||
|
|
if (FileWrite( pOutputFile,
|
||
|
|
&Value,
|
||
|
|
sizeof(WORD),
|
||
|
|
Num,
|
||
|
|
"WRITE WORDS" ))
|
||
|
|
{
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return success.
|
||
|
|
//
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// FileWrite
|
||
|
|
//
|
||
|
|
// This routine writes the given buffer to the output file. If an error is
|
||
|
|
// encountered, then it is returned.
|
||
|
|
//
|
||
|
|
// 07-30-91 JulieB Created.
|
||
|
|
// 12-10-91 JulieB Modified for new table format.
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
int FileWrite(
|
||
|
|
FILE *pOutputFile,
|
||
|
|
void *Buffer,
|
||
|
|
int Size,
|
||
|
|
int Count,
|
||
|
|
char *ErrStr)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Write information to output file.
|
||
|
|
//
|
||
|
|
if (fwrite( Buffer,
|
||
|
|
Size,
|
||
|
|
Count,
|
||
|
|
pOutputFile ) != (unsigned int)Count)
|
||
|
|
{
|
||
|
|
printf("Write Error: Can't write %s to file.\n", ErrStr);
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return success.
|
||
|
|
//
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// RemoveDuplicate844Levels
|
||
|
|
//
|
||
|
|
// This routine removes all duplicate second levels and all duplicate
|
||
|
|
// third levels from an 8:4:4 table.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void RemoveDuplicate844Levels(
|
||
|
|
P844_ARRAY pArr,
|
||
|
|
int *pBuf2,
|
||
|
|
int *pBuf3,
|
||
|
|
int Size)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Remove the duplicates from the third level of the 8:4:4 table
|
||
|
|
// first.
|
||
|
|
//
|
||
|
|
RemoveDuplicate844Level3( pArr,
|
||
|
|
pBuf3,
|
||
|
|
Size );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Remove the duplicates from the second level of the 8:4:4 table.
|
||
|
|
//
|
||
|
|
RemoveDuplicate844Level2( pArr,
|
||
|
|
pBuf2 );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------------------//
|
||
|
|
// INTERNAL ROUTINES //
|
||
|
|
//-------------------------------------------------------------------------//
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// RemoveDuplicate844Level2
|
||
|
|
//
|
||
|
|
// This routine removes all duplicate second levels from the given 8:4:4
|
||
|
|
// table.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void RemoveDuplicate844Level2(
|
||
|
|
P844_ARRAY pArr,
|
||
|
|
int *pBuf2)
|
||
|
|
{
|
||
|
|
P844_ARRAY pTbl2; // ptr to second array
|
||
|
|
P844_ARRAY pCmp; // ptr to second array to compare
|
||
|
|
int Ctr, Ctr2, Ctr3; // loop counters
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Search through all second level tables. If there is a duplicate,
|
||
|
|
// fix the affected pointers in the first level table and free the
|
||
|
|
// duplicate table.
|
||
|
|
//
|
||
|
|
for (Ctr = 1; Ctr < TABLE_SIZE_8; Ctr++)
|
||
|
|
{
|
||
|
|
if ((pTbl2 = (P844_ARRAY)(pArr[Ctr])) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// See if any of the previous second level tables are the
|
||
|
|
// same as the current one.
|
||
|
|
//
|
||
|
|
for (Ctr2 = Ctr - 1; Ctr2 >= 0; Ctr2--)
|
||
|
|
{
|
||
|
|
if ((pCmp = (P844_ARRAY)(pArr[Ctr2])) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Compare each entry in both tables to see if
|
||
|
|
// the tables are the same.
|
||
|
|
//
|
||
|
|
for (Ctr3 = 0; Ctr3 < TABLE_SIZE_4; Ctr3++)
|
||
|
|
{
|
||
|
|
if (pTbl2[Ctr3] != pCmp[Ctr3])
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (Ctr3 == TABLE_SIZE_4)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Tables are the same. Fix the pointer
|
||
|
|
// in the first level table.
|
||
|
|
//
|
||
|
|
pArr[Ctr] = pCmp;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Free the duplicate second level table.
|
||
|
|
//
|
||
|
|
free(pTbl2);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Decrement the number of second level tables.
|
||
|
|
//
|
||
|
|
(*pBuf2)--;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Found the duplicate, so break out of the
|
||
|
|
// comparison loop.
|
||
|
|
//
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// RemoveDuplicate844Level3
|
||
|
|
//
|
||
|
|
// This routine removes all duplicate third levels from the given 8:4:4
|
||
|
|
// table.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void RemoveDuplicate844Level3(
|
||
|
|
P844_ARRAY pArr,
|
||
|
|
int *pBuf3,
|
||
|
|
int Size)
|
||
|
|
{
|
||
|
|
P844_ARRAY pTbl2; // ptr to second array
|
||
|
|
PVOID pTbl3; // ptr to third array
|
||
|
|
PVOID pCmp; // ptr to third array to compare
|
||
|
|
PCT_HASH_OBJECT *pHashTbl; // hash table
|
||
|
|
int Ctr, Ctr2; // loop counters
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Allocate the hash table.
|
||
|
|
//
|
||
|
|
pHashTbl = (PCT_HASH_OBJECT *)malloc(HASH_SIZE * sizeof(PCT_HASH_OBJECT));
|
||
|
|
memset( pHashTbl,
|
||
|
|
0,
|
||
|
|
(HASH_SIZE * sizeof(PCT_HASH_OBJECT)) );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Search through all third level tables. If there is a duplicate,
|
||
|
|
// fix the affected pointers in the second level tables and free the
|
||
|
|
// duplicate table.
|
||
|
|
//
|
||
|
|
for (Ctr = 0; Ctr < TABLE_SIZE_8; Ctr++)
|
||
|
|
{
|
||
|
|
if ((pTbl2 = (P844_ARRAY)(pArr[Ctr])) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// See if any of the previous third level tables are the
|
||
|
|
// same as the current one.
|
||
|
|
//
|
||
|
|
for (Ctr2 = 0; Ctr2 < TABLE_SIZE_4; Ctr2++)
|
||
|
|
{
|
||
|
|
if ((pTbl3 = pTbl2[Ctr2]) != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Compare each entry in the table to see if
|
||
|
|
// the table is the same as any of the previous
|
||
|
|
// tables.
|
||
|
|
//
|
||
|
|
pCmp = FindHashTable( pTbl3,
|
||
|
|
pHashTbl,
|
||
|
|
Size );
|
||
|
|
|
||
|
|
if (pCmp != NULL)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Tables are the same. Fix the pointer
|
||
|
|
// in the second level table.
|
||
|
|
//
|
||
|
|
pTbl2[Ctr2] = pCmp;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Free the duplicate third level table.
|
||
|
|
//
|
||
|
|
free(pTbl3);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Decrement the number of second level tables.
|
||
|
|
//
|
||
|
|
(*pBuf3)--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Free the hash table.
|
||
|
|
//
|
||
|
|
FreeHashTable(pHashTbl);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// FindHashTable
|
||
|
|
//
|
||
|
|
// This routine searches the hash table for the given third level table.
|
||
|
|
// If a matching table is found, the pointer to the table is returned.
|
||
|
|
// Otherwise, it returns NULL.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
PVOID FindHashTable(
|
||
|
|
PVOID pTbl,
|
||
|
|
PCT_HASH_OBJECT *pHashTbl,
|
||
|
|
int Size)
|
||
|
|
{
|
||
|
|
DWORD HashVal; // hash value
|
||
|
|
PCT_HASH_OBJECT pHashN; // ptr to hash node
|
||
|
|
PCT_HASH_OBJECT pNewHash; // ptr to new hash node
|
||
|
|
int Ctr; // loop counter
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get hash value of the given table.
|
||
|
|
//
|
||
|
|
HashVal = GetHashVal(pTbl, Size);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Search through all hash tables.
|
||
|
|
//
|
||
|
|
for (pHashN = pHashTbl[HashVal]; pHashN != NULL; pHashN = pHashN->pNext)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// See if the two tables are the same. If they are, return the
|
||
|
|
// pointer to the table.
|
||
|
|
//
|
||
|
|
for (Ctr = 0; Ctr < TABLE_SIZE_4; Ctr++)
|
||
|
|
{
|
||
|
|
if (memcmp( ((BYTE *)(pHashN->pTable)) + (Ctr * Size),
|
||
|
|
((BYTE *)pTbl) + (Ctr * Size),
|
||
|
|
Size ))
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (Ctr == TABLE_SIZE_4)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Tables are the same. Return the pointer to the table.
|
||
|
|
//
|
||
|
|
return (pHashN->pTable);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Could not find a table that matched the given table.
|
||
|
|
// Create a new hash node and insert it in the hash table.
|
||
|
|
//
|
||
|
|
pNewHash = (PCT_HASH_OBJECT)malloc(sizeof(CT_HASH_OBJECT));
|
||
|
|
pNewHash->pTable = pTbl;
|
||
|
|
pNewHash->pNext = pHashTbl[HashVal];
|
||
|
|
pHashTbl[HashVal] = pNewHash;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return NULL to indicate that an identical table could not be found.
|
||
|
|
//
|
||
|
|
return (NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// GetHashVal
|
||
|
|
//
|
||
|
|
// This routine calculates the hash value of a table.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
DWORD GetHashVal(
|
||
|
|
PVOID pTbl,
|
||
|
|
int Size)
|
||
|
|
{
|
||
|
|
DWORD HashVal = 0; // hash value
|
||
|
|
DWORD Multiplier = 1; // multiplier for each entry
|
||
|
|
int Ctr; // loop counter
|
||
|
|
|
||
|
|
|
||
|
|
for (Ctr = 0; Ctr < TABLE_SIZE_4; Ctr++)
|
||
|
|
{
|
||
|
|
HashVal += ((*(((BYTE *)pTbl) + (Ctr * Size))) * Multiplier);
|
||
|
|
Multiplier *= 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ((DWORD)(HashVal / HASH_SIZE));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// FreeHashTable
|
||
|
|
//
|
||
|
|
// This routine frees the hash table.
|
||
|
|
//
|
||
|
|
////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void FreeHashTable(
|
||
|
|
PCT_HASH_OBJECT *pHashTbl)
|
||
|
|
{
|
||
|
|
PCT_HASH_OBJECT pHashN; // ptr to hash node
|
||
|
|
PCT_HASH_OBJECT pNext; // ptr to next hash node
|
||
|
|
int Ctr = 0; // loop counter
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Search through each entry in the hash table and free each node.
|
||
|
|
//
|
||
|
|
for (Ctr = 0; Ctr < HASH_SIZE; Ctr++)
|
||
|
|
{
|
||
|
|
pHashN = pHashTbl[Ctr];
|
||
|
|
while (pHashN != NULL)
|
||
|
|
{
|
||
|
|
pNext = pHashN->pNext;
|
||
|
|
free(pHashN);
|
||
|
|
pHashN = pNext;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Free the hash table array.
|
||
|
|
//
|
||
|
|
free(pHashTbl);
|
||
|
|
}
|