1597 lines
34 KiB
C
1597 lines
34 KiB
C
/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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hash.c
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Abstract:
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Replacement routines for the string table functions in setupapi.dll.
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This routines are much more easy to work with.
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Author:
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Jim Schmidt (jimschm) 22-Dec-1998
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Revision History:
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jimschm 23-Nov-1999 Removed setup api compatibility, fixed enum
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to be insertion order
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ovidiut 14-Oct-1999 New coding conventions + Win64 compliance.
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marcw 2-Sep-1999 Moved over from Win9xUpg project.
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--*/
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#include "pch.h"
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//
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// Includes
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//
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// None
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#define DBG_HASH "HashTable"
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//
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// Strings
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//
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#define S_HASHTABLE "HashTable"
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//
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// Constants
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//
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#define BUCKETS 1009
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#define HASHTABLE_SIGNATURE 0x122398ff
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//
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// Macros
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//
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#ifdef DEBUG
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#define ASSERT_TABLE_IS_VALID(table) MYASSERT(pTableIsValid(table))
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#else
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#define ASSERT_TABLE_IS_VALID(table)
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#endif
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//
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// Types
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//
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typedef struct _tagBUCKETITEM {
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struct _tagBUCKETITEM *Next;
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struct _tagBUCKETITEM *NextLink, *PrevLink;
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WORD StringSize;
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// string follows StringSize
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// optional data follows string
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} BUCKETITEM, *PBUCKETITEM;
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typedef struct {
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struct _tagBUCKETITEM *Next;
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struct _tagBUCKETITEM *NextLink, *PrevLink;
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PVOID String;
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// optional data follows struct
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} BUCKETITEM_EXTERN_STR, *PBUCKETITEM_EXTERN_STR;
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typedef struct {
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DWORD Signature;
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BOOL Unicode;
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BOOL ExternalStrings;
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PMHANDLE Pool;
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PBUCKETITEM *Bucket;
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PBUCKETITEM FirstLink;
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PBUCKETITEM LastLink;
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UINT ExtraDataSize;
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UINT MinimumStringBytes;
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UINT MaximumStringBytes;
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UINT Buckets;
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} HASHTABLESTRUCT, *PHASHTABLESTRUCT;
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//
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// Globals
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//
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// None
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//
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// Macro expansion list
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//
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// None
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//
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// Private function prototypes
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//
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// None
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//
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// Macro expansion definition
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//
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// None
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//
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// Code
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//
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#ifdef DEBUG
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BOOL
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pTableIsValid (
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IN HASHTABLE Table
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)
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{
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BOOL b = TRUE;
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if (!Table) {
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return FALSE;
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}
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__try {
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if (((PHASHTABLESTRUCT) Table)->Signature != HASHTABLE_SIGNATURE) {
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b = FALSE;
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}
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}
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__except (TRUE) {
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b = FALSE;
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}
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return b;
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}
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#endif
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/*++
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Routine Description:
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pComputeHashValue adds all the character values of the string, shifting to
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maintain order.
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Arguments:
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String - Specifies the string to compute the hash value for
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Return Value:
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The hash value, within the range of 0 to BUCKETS - 1.
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--*/
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UINT
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pComputeHashValueA (
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IN PCSTR String,
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IN UINT Buckets
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)
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{
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UINT hashValue = 0;
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while (*String) {
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hashValue = _rotl (hashValue, 2);
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hashValue += (UINT) *String;
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String++;
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}
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hashValue %= Buckets;
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return hashValue;
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}
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UINT
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pComputeHashValueW (
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IN PCWSTR String,
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IN UINT Buckets
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)
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{
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UINT hashValue = 0;
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while (*String) {
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hashValue = _rotl (hashValue, 2);
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hashValue += (UINT) *String;
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String++;
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}
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hashValue %= Buckets;
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return hashValue;
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}
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UINT
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pComputePrefixHashValueA (
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IN PCSTR String,
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IN UINT Size,
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IN UINT Buckets
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)
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{
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UINT hashValue = 0;
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PCSTR end;
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end = (PCSTR) ((PBYTE) String + Size);
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while (String < end) {
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hashValue = _rotl (hashValue, 2);
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hashValue += (UINT) *String;
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String++;
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}
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hashValue %= Buckets;
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return hashValue;
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}
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UINT
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pComputePrefixHashValueW (
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IN PCWSTR String,
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IN UINT Size,
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IN UINT Buckets
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)
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{
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UINT hashValue = 0;
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PCWSTR end;
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end = (PCWSTR) ((PBYTE) String + Size);
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while (String < end) {
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hashValue = _rotl (hashValue, 2);
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hashValue += (UINT) *String;
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String++;
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}
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hashValue %= Buckets;
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return hashValue;
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}
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HASHTABLE
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HtAllocExAW (
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IN BOOL Unicode,
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IN BOOL ExternalStrings,
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IN UINT ExtraDataSize,
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IN UINT Buckets
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)
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/*++
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Routine Description:
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AllocateHashTableEx creates a hash table. If ExtraDataSize is non-zero,
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each hash table entry gets an allocation of ExtraDataSize added to it.
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Arguments:
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Unicode - Specifies TRUE to allocate a UNICODE hash table, or FALSE to
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allocate an ANSI table. None of the routines in this file do any
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sort of UNICODE/ANSI converstion.
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ExternalStrings - Specifies TRUE if the strings belong to memory maintained
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by the caller
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ExtraDataSize - Specifies the size of binary data associated with the
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table item, or 0 for none.
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Return Value:
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A handle to the string table.
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--*/
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{
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PHASHTABLESTRUCT hashTable;
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PMHANDLE pool;
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if (!Buckets) {
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Buckets = BUCKETS;
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}
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pool = PmCreateNamedPool (S_HASHTABLE);
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MYASSERT (pool);
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hashTable = (PHASHTABLESTRUCT) PmGetAlignedMemory (
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pool,
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sizeof (HASHTABLESTRUCT) + (sizeof (PBUCKETITEM) * Buckets)
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);
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MYASSERT (hashTable);
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hashTable->Signature = HASHTABLE_SIGNATURE;
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hashTable->Unicode = Unicode;
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hashTable->ExternalStrings = ExternalStrings;
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hashTable->Pool = pool;
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hashTable->Bucket = (PBUCKETITEM *) ((PBYTE) hashTable + sizeof (HASHTABLESTRUCT));
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hashTable->FirstLink = NULL;
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hashTable->LastLink = NULL;
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hashTable->ExtraDataSize = ExtraDataSize;
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hashTable->MinimumStringBytes = (UINT) -1;
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hashTable->MaximumStringBytes = 0;
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hashTable->Buckets = Buckets;
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//
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// Zero out all of the bucket structures.
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//
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ZeroMemory (hashTable->Bucket, sizeof (PBUCKETITEM) * Buckets);
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return (HASHTABLE) hashTable;
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}
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VOID
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HtFree (
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IN HASHTABLE HashTable
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)
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/*++
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Routine Description:
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HtFree releases all resources associated with a string table.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
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if (table) {
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ASSERT_TABLE_IS_VALID (HashTable);
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PmDestroyPool (table->Pool);
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}
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}
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PBUCKETITEM
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pHtFindStringA (
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IN HASHTABLE HashTable,
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IN PCSTR String,
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OUT PVOID ExtraData, OPTIONAL
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IN BOOL CaseSensitive,
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OUT PUINT OutHashValue
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)
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/*++
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Routine Description:
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pHtFindString implements the hash table lookup routine. It returns the
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pointer to the bucket item or NULL if the item was not found.
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Arguments:
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HashTable - Specifies the handle to the hash table
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String - Specifies the string to find. If this string is
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case-insensitive but has already been lowercased, then make
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sure to pass TRUE in the CaseSensitive argument.
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ExtraData - Specifies the bytes to be copied to the hash table entry.
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CaseSensitive - Specifies TRUE if the hash table is case-sensitive, FALSE
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otherwise.
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OutHashValue - Receives the hash value. This is non optional for
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efficiency.
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Return Value:
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The pointer to the bucket item or NULL if no item was found.
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--*/
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{
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PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
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PSTR dupStr = NULL;
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UINT hashValue;
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PBUCKETITEM item;
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PCSTR p1, p2;
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PCVOID storedDataPtr;
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ASSERT_TABLE_IS_VALID (HashTable);
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if (!CaseSensitive) {
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dupStr = DuplicateTextA (String);
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(void) _mbslwr (dupStr);
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String = dupStr;
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}
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hashValue = pComputeHashValueA (String, table->Buckets);
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item = table->Bucket[hashValue];
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while (item) {
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if (table->ExternalStrings) {
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p1 = (PCSTR) ((PBUCKETITEM_EXTERN_STR) item)->String;
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} else {
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p1 = (PCSTR) ((PBYTE) item + sizeof (BUCKETITEM));
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}
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p2 = String;
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while (*p1) {
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if (*p1 != *p2) {
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break;
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}
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p1++;
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p2++;
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}
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if (*p1 == 0 && *p2 == 0) {
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break;
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}
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item = item->Next;
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}
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if (item && ExtraData) {
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(void) HtGetStringData (HashTable, (HASHITEM)item, &storedDataPtr);
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CopyMemory (
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(PBYTE) ExtraData,
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(PBYTE) storedDataPtr,
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table->ExtraDataSize
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);
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}
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FreeTextA (dupStr);
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*OutHashValue = hashValue;
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return item;
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}
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PBUCKETITEM
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pHtFindStringW (
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IN HASHTABLE HashTable,
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IN PCWSTR String,
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OUT PVOID ExtraData, OPTIONAL
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IN BOOL CaseSensitive,
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OUT PUINT OutHashValue
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)
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{
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PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
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PWSTR dupStr = NULL;
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UINT hashValue;
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PBUCKETITEM item;
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PCWSTR p1, p2;
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PCVOID storedDataPtr;
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ASSERT_TABLE_IS_VALID (HashTable);
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if (!CaseSensitive) {
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dupStr = DuplicateTextW (String);
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(void) _wcslwr (dupStr);
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String = dupStr;
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}
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hashValue = pComputeHashValueW (String, table->Buckets);
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item = table->Bucket[hashValue];
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while (item) {
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if (table->ExternalStrings) {
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p1 = (PCWSTR) ((PBUCKETITEM_EXTERN_STR) item)->String;
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} else {
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p1 = (PCWSTR) ((PBYTE) item + sizeof (BUCKETITEM));
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}
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p2 = String;
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while (*p1) {
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if (*p1 != *p2) {
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break;
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}
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p1++;
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p2++;
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}
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if (*p1 == 0 && *p2 == 0) {
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break;
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}
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item = item->Next;
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}
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if (item && ExtraData) {
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(void) HtGetStringData (HashTable, (HASHITEM)item, &storedDataPtr);
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CopyMemory (
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(PBYTE) ExtraData,
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(PBYTE) storedDataPtr,
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table->ExtraDataSize
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);
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}
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FreeTextW (dupStr);
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*OutHashValue = hashValue;
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return item;
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}
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PBUCKETITEM
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pHtFindPrefixA (
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IN HASHTABLE HashTable,
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IN PCSTR String,
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IN PCSTR BufferEnd,
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OUT PVOID ExtraData, OPTIONAL
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IN BOOL CaseSensitive,
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OUT PUINT OutHashValue
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)
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/*++
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Routine Description:
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pHtFindPrefix implements a hash table lookup routine that tests each hash
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table entry, character-by-character, until a match is found, or until the
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hash table maximum is reached. It returns the pointer to the bucket item or
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NULL if the item was not found.
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Arguments:
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HashTable - Specifies the handle to the hash table
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String - Specifies the string to find. If this string is
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case-insensitive but has already been lowercased, then make
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sure to pass TRUE in the CaseSensitive argument.
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BufferEnd - Specifies the end of the string buffer, which may be longer
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than all entries in the hash table, or it may be shorter.
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ExtraData - Specifies the bytes to be copied to the hash table entry.
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CaseSensitive - Specifies TRUE if the hash table is case-sensitive, FALSE
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otherwise.
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OutHashValue - Receives the hash value. This is non optional for
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efficiency. If pHtFindPrefix does not find a match,
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this value will be set to zero.
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Return Value:
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The pointer to the bucket item or NULL if no item was found.
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--*/
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{
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PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
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PSTR dupStr = NULL;
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UINT hashValue = 0;
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PBUCKETITEM item = NULL;
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PCSTR p1, p2;
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PCSTR p1End;
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PCVOID storedDataPtr;
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UINT maxBytes;
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UINT currentBytes;
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PCSTR shortestEnd;
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ASSERT_TABLE_IS_VALID (HashTable);
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maxBytes = (UINT)((PBYTE) BufferEnd - (PBYTE) String);
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maxBytes = min (maxBytes, table->MaximumStringBytes);
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if (!maxBytes || table->MinimumStringBytes == (UINT) -1) {
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return NULL;
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}
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if (!CaseSensitive) {
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dupStr = AllocTextA (maxBytes / sizeof (CHAR));
|
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if (dupStr) {
|
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StringCopyByteCountA (dupStr, String, maxBytes + sizeof (CHAR));
|
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_mbslwr (dupStr);
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String = dupStr;
|
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}
|
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}
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BufferEnd = (PCSTR) ((PBYTE) String + maxBytes);
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shortestEnd = (PCSTR) ((PBYTE) String + table->MinimumStringBytes);
|
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if (shortestEnd == String) {
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shortestEnd = _mbsinc (shortestEnd);
|
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}
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while (BufferEnd >= shortestEnd) {
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currentBytes = (UINT)((PBYTE) BufferEnd - (PBYTE) String);
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hashValue = pComputePrefixHashValueA (String, currentBytes, table->Buckets);
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item = table->Bucket[hashValue];
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while (item) {
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if ((item->StringSize - sizeof (CHAR)) == currentBytes) {
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if (table->ExternalStrings) {
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p1 = (PCSTR) ((PBUCKETITEM_EXTERN_STR) item)->String;
|
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} else {
|
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p1 = (PCSTR) ((PBYTE) item + sizeof (BUCKETITEM));
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}
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p1End = (PCSTR) ((PBYTE) p1 + currentBytes);
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p2 = String;
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while (p1 < p1End) {
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if (*p1 != *p2) {
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break;
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}
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p1++;
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p2++;
|
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}
|
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if (p1 == p1End) {
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break;
|
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}
|
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}
|
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item = item->Next;
|
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}
|
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|
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if (item) {
|
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break;
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}
|
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BufferEnd = _mbsdec2 (String, BufferEnd);
|
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}
|
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|
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if (item && ExtraData) {
|
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(void) HtGetStringData (HashTable, (HASHITEM)item, &storedDataPtr);
|
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|
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CopyMemory (
|
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(PBYTE) ExtraData,
|
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(PBYTE) storedDataPtr,
|
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table->ExtraDataSize
|
|
);
|
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}
|
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|
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FreeTextA (dupStr);
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*OutHashValue = hashValue;
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return item;
|
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}
|
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|
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|
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PBUCKETITEM
|
|
pHtFindPrefixW (
|
|
IN HASHTABLE HashTable,
|
|
IN PCWSTR String,
|
|
IN PCWSTR BufferEnd,
|
|
OUT PVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive,
|
|
OUT PUINT OutHashValue
|
|
)
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PWSTR dupStr = NULL;
|
|
UINT hashValue = 0;
|
|
PBUCKETITEM item = NULL;
|
|
PCWSTR p1, p2;
|
|
PCWSTR p1End;
|
|
PCVOID storedDataPtr;
|
|
UINT maxBytes;
|
|
PCWSTR shortestEnd;
|
|
UINT currentBytes;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
maxBytes = (UINT)((PBYTE) BufferEnd - (PBYTE) String);
|
|
maxBytes = min (maxBytes, table->MaximumStringBytes);
|
|
|
|
if (!maxBytes || table->MinimumStringBytes == (UINT) -1) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!CaseSensitive) {
|
|
dupStr = AllocTextW (maxBytes / sizeof (WCHAR));
|
|
if (dupStr) {
|
|
StringCopyByteCountW (dupStr, String, maxBytes + sizeof (WCHAR));
|
|
_wcslwr (dupStr);
|
|
String = dupStr;
|
|
}
|
|
}
|
|
|
|
BufferEnd = (PCWSTR) ((PBYTE) String + maxBytes);
|
|
shortestEnd = (PCWSTR) ((PBYTE) String + table->MinimumStringBytes);
|
|
if (shortestEnd == String) {
|
|
shortestEnd++;
|
|
}
|
|
|
|
while (BufferEnd >= shortestEnd) {
|
|
|
|
currentBytes = (UINT)((PBYTE) BufferEnd - (PBYTE) String);
|
|
|
|
hashValue = pComputePrefixHashValueW (String, currentBytes, table->Buckets);
|
|
|
|
item = table->Bucket[hashValue];
|
|
|
|
while (item) {
|
|
|
|
if ((item->StringSize - sizeof (WCHAR)) == currentBytes) {
|
|
|
|
if (table->ExternalStrings) {
|
|
p1 = (PCWSTR) ((PBUCKETITEM_EXTERN_STR) item)->String;
|
|
} else {
|
|
p1 = (PCWSTR) ((PBYTE) item + sizeof (BUCKETITEM));
|
|
}
|
|
|
|
p1End = (PCWSTR) ((PBYTE) p1 + currentBytes);
|
|
p2 = String;
|
|
|
|
while (p1 < p1End) {
|
|
if (*p1 != *p2) {
|
|
break;
|
|
}
|
|
|
|
p1++;
|
|
p2++;
|
|
}
|
|
|
|
if (p1 == p1End) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
item = item->Next;
|
|
}
|
|
|
|
if (item) {
|
|
break;
|
|
}
|
|
|
|
BufferEnd--;
|
|
}
|
|
|
|
if (item && ExtraData) {
|
|
(void) HtGetStringData (HashTable, (HASHITEM)item, &storedDataPtr);
|
|
|
|
CopyMemory (
|
|
(PBYTE) ExtraData,
|
|
(PBYTE) storedDataPtr,
|
|
table->ExtraDataSize
|
|
);
|
|
}
|
|
|
|
FreeTextW (dupStr);
|
|
|
|
*OutHashValue = hashValue;
|
|
|
|
return item;
|
|
}
|
|
|
|
|
|
HASHITEM
|
|
HtAddStringExA (
|
|
IN HASHTABLE HashTable,
|
|
IN PCSTR String,
|
|
IN PCVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtAddStringEx adds a string to the hash table, and copies ExtraData to the
|
|
new hash table entry. If String is already in the hash table, the ExtraData
|
|
is updated.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the handle to the hash table, as returned from
|
|
AllocateHashTable.
|
|
String - Specifies the string to add to the table
|
|
ExtraData - Specifies the source binary data to be copied to the hash
|
|
table entry
|
|
CaseSensitive - Specifies TRUE if the string compares are case-sensitive,
|
|
or FALSE if they are case-insensitive.
|
|
|
|
Return Value:
|
|
|
|
Returns the pointer to the bucket item allocated or update.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PBUCKETITEM item;
|
|
PBUCKETITEM_EXTERN_STR externItem;
|
|
PBUCKETITEM existingItem;
|
|
PSTR dupStr = NULL;
|
|
HASHITEM rc = NULL;
|
|
UINT size;
|
|
UINT hashValue;
|
|
UINT strSize;
|
|
PCVOID storedDataPtr;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (table->Unicode) {
|
|
DEBUGMSG ((DBG_WHOOPS, "Cannot add ANSI string to UNICODE table"));
|
|
return 0;
|
|
}
|
|
|
|
if (!CaseSensitive) {
|
|
dupStr = DuplicateTextA (String);
|
|
_mbslwr (dupStr);
|
|
String = dupStr;
|
|
}
|
|
|
|
existingItem = pHtFindStringA (HashTable, String, NULL, TRUE, &hashValue);
|
|
|
|
if (existingItem) {
|
|
|
|
rc = (HASHITEM) existingItem;
|
|
|
|
} else {
|
|
|
|
//
|
|
// item does not exist, add it now
|
|
//
|
|
|
|
strSize = SizeOfStringA (String);
|
|
|
|
if (table->ExternalStrings) {
|
|
|
|
size = sizeof (BUCKETITEM_EXTERN_STR) + table->ExtraDataSize;
|
|
|
|
externItem = (PBUCKETITEM_EXTERN_STR) PmGetAlignedMemory (table->Pool, size);
|
|
MYASSERT (externItem);
|
|
|
|
externItem->Next = table->Bucket[hashValue];
|
|
table->Bucket[hashValue] = (PBUCKETITEM) externItem;
|
|
|
|
if (table->LastLink) {
|
|
table->LastLink->NextLink = (PBUCKETITEM) externItem;
|
|
}
|
|
externItem->PrevLink = table->LastLink;
|
|
table->LastLink = (PBUCKETITEM) externItem;
|
|
externItem->NextLink = NULL;
|
|
|
|
if (!table->FirstLink) {
|
|
table->FirstLink = (PBUCKETITEM) externItem;
|
|
}
|
|
rc = (HASHITEM) externItem;
|
|
|
|
} else {
|
|
|
|
size = sizeof (BUCKETITEM) + strSize + table->ExtraDataSize;
|
|
|
|
item = (PBUCKETITEM) PmGetAlignedMemory (table->Pool, size);
|
|
MYASSERT (item);
|
|
|
|
item->Next = table->Bucket[hashValue];
|
|
table->Bucket[hashValue] = item;
|
|
|
|
item->StringSize = (WORD) strSize;
|
|
CopyMemory ((PBYTE) item + sizeof (BUCKETITEM), String, strSize);
|
|
|
|
if (table->LastLink) {
|
|
table->LastLink->NextLink = item;
|
|
}
|
|
item->PrevLink = table->LastLink;
|
|
table->LastLink = item;
|
|
item->NextLink = NULL;
|
|
|
|
if (!table->FirstLink) {
|
|
table->FirstLink = item;
|
|
}
|
|
|
|
rc = (HASHITEM) item;
|
|
}
|
|
|
|
strSize -= sizeof (CHAR);
|
|
table->MaximumStringBytes = max (table->MaximumStringBytes, strSize);
|
|
table->MinimumStringBytes = min (table->MinimumStringBytes, strSize);
|
|
}
|
|
|
|
MYASSERT (rc);
|
|
(void) HtGetStringData (HashTable, rc, &storedDataPtr);
|
|
|
|
if (ExtraData) {
|
|
|
|
CopyMemory (
|
|
(PBYTE) storedDataPtr,
|
|
(PBYTE) ExtraData,
|
|
table->ExtraDataSize
|
|
);
|
|
|
|
} else if (!existingItem) {
|
|
|
|
ZeroMemory (
|
|
(PBYTE) storedDataPtr,
|
|
table->ExtraDataSize
|
|
);
|
|
}
|
|
|
|
FreeTextA (dupStr);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
HASHITEM
|
|
HtAddStringExW (
|
|
IN HASHTABLE HashTable,
|
|
IN PCWSTR String,
|
|
IN PCVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PBUCKETITEM item;
|
|
PBUCKETITEM_EXTERN_STR externItem;
|
|
PBUCKETITEM existingItem;
|
|
PWSTR dupStr = NULL;
|
|
HASHITEM rc = NULL;
|
|
UINT size;
|
|
UINT hashValue;
|
|
UINT strSize;
|
|
PCVOID storedDataPtr;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (!table->Unicode) {
|
|
DEBUGMSG ((DBG_WHOOPS, "Cannot add ANSI string to UNICODE table"));
|
|
return 0;
|
|
}
|
|
|
|
if (!CaseSensitive) {
|
|
dupStr = DuplicateTextW (String);
|
|
_wcslwr (dupStr);
|
|
String = dupStr;
|
|
}
|
|
|
|
existingItem = pHtFindStringW (HashTable, String, NULL, TRUE, &hashValue);
|
|
|
|
if (existingItem) {
|
|
|
|
rc = (HASHITEM) existingItem;
|
|
|
|
} else {
|
|
|
|
//
|
|
// item does not exist, add it now
|
|
//
|
|
|
|
strSize = SizeOfStringW (String);
|
|
|
|
if (table->ExternalStrings) {
|
|
|
|
size = sizeof (BUCKETITEM_EXTERN_STR) + table->ExtraDataSize;
|
|
|
|
externItem = (PBUCKETITEM_EXTERN_STR) PmGetAlignedMemory (table->Pool, size);
|
|
MYASSERT (externItem);
|
|
|
|
externItem->Next = table->Bucket[hashValue];
|
|
table->Bucket[hashValue] = (PBUCKETITEM) externItem;
|
|
|
|
if (table->LastLink) {
|
|
table->LastLink->NextLink = (PBUCKETITEM) externItem;
|
|
}
|
|
externItem->PrevLink = table->LastLink;
|
|
table->LastLink = (PBUCKETITEM) externItem;
|
|
externItem->NextLink = NULL;
|
|
|
|
if (!table->FirstLink) {
|
|
table->FirstLink = (PBUCKETITEM) externItem;
|
|
}
|
|
|
|
rc = (HASHITEM) externItem;
|
|
|
|
} else {
|
|
|
|
size = sizeof (BUCKETITEM) + strSize + table->ExtraDataSize;
|
|
|
|
item = (PBUCKETITEM) PmGetAlignedMemory (table->Pool, size);
|
|
MYASSERT (item);
|
|
|
|
item->Next = table->Bucket[hashValue];
|
|
table->Bucket[hashValue] = item;
|
|
|
|
item->StringSize = (WORD) strSize;
|
|
CopyMemory ((PBYTE) item + sizeof (BUCKETITEM), String, strSize);
|
|
|
|
if (table->LastLink) {
|
|
table->LastLink->NextLink = item;
|
|
}
|
|
item->PrevLink = table->LastLink;
|
|
table->LastLink = item;
|
|
item->NextLink = NULL;
|
|
|
|
if (!table->FirstLink) {
|
|
table->FirstLink = item;
|
|
}
|
|
|
|
rc = (HASHITEM) item;
|
|
}
|
|
|
|
strSize -= sizeof (WCHAR);
|
|
table->MaximumStringBytes = max (table->MaximumStringBytes, strSize);
|
|
table->MinimumStringBytes = min (table->MinimumStringBytes, strSize);
|
|
}
|
|
|
|
MYASSERT (rc);
|
|
(void) HtGetStringData (HashTable, rc, &storedDataPtr);
|
|
|
|
if (ExtraData) {
|
|
|
|
CopyMemory (
|
|
(PBYTE) storedDataPtr,
|
|
(PBYTE) ExtraData,
|
|
table->ExtraDataSize
|
|
);
|
|
|
|
} else if (!existingItem) {
|
|
|
|
ZeroMemory (
|
|
(PBYTE) storedDataPtr,
|
|
table->ExtraDataSize
|
|
);
|
|
}
|
|
|
|
FreeTextW (dupStr);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtFindStringEx is the external entry point for pHtFindString.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the hash table handle, as returned by
|
|
AllocateHashTable.
|
|
String - Specifies the string to find
|
|
ExtraData - Receives the extra data associated with the found item
|
|
CaseSensitive - Specifies TRUE if the find should be case-sensitive, FALSE
|
|
if it should be case-insensitive.
|
|
|
|
Return Value:
|
|
|
|
A pointer to the bucket item or NULL if the string was not found.
|
|
|
|
--*/
|
|
|
|
HASHITEM
|
|
HtFindStringExA (
|
|
IN HASHTABLE HashTable,
|
|
IN PCSTR String,
|
|
OUT PVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
{
|
|
UINT dontCare;
|
|
|
|
return (HASHITEM) pHtFindStringA (HashTable, String, ExtraData, CaseSensitive, &dontCare);
|
|
}
|
|
|
|
|
|
HASHITEM
|
|
HtFindStringExW (
|
|
IN HASHTABLE HashTable,
|
|
IN PCWSTR String,
|
|
OUT PVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
{
|
|
UINT dontCare;
|
|
|
|
return (HASHITEM) pHtFindStringW (HashTable, String, ExtraData, CaseSensitive, &dontCare);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtFindStringEx is the external entry point for pHtFindString.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the hash table handle, as returned by
|
|
AllocateHashTable.
|
|
String - Specifies the string to find
|
|
BufferEnd - Specifies the end of the buffer for String
|
|
ExtraData - Receives the extra data associated with the found item
|
|
CaseSensitive - Specifies TRUE if the find should be case-sensitive, FALSE
|
|
if it should be case-insensitive.
|
|
|
|
Return Value:
|
|
|
|
A pointer to the bucket item or NULL if the string was not found.
|
|
|
|
--*/
|
|
|
|
HASHITEM
|
|
HtFindPrefixExA (
|
|
IN HASHTABLE HashTable,
|
|
IN PCSTR String,
|
|
IN PCSTR BufferEnd,
|
|
OUT PVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
{
|
|
UINT dontCare;
|
|
|
|
return (HASHITEM) pHtFindPrefixA (
|
|
HashTable,
|
|
String,
|
|
BufferEnd,
|
|
ExtraData,
|
|
CaseSensitive,
|
|
&dontCare
|
|
);
|
|
}
|
|
|
|
|
|
HASHITEM
|
|
HtFindPrefixExW (
|
|
IN HASHTABLE HashTable,
|
|
IN PCWSTR String,
|
|
IN PCWSTR BufferEnd,
|
|
OUT PVOID ExtraData, OPTIONAL
|
|
IN BOOL CaseSensitive
|
|
)
|
|
{
|
|
UINT dontCare;
|
|
|
|
return (HASHITEM) pHtFindPrefixW (
|
|
HashTable,
|
|
String,
|
|
BufferEnd,
|
|
ExtraData,
|
|
CaseSensitive,
|
|
&dontCare
|
|
);
|
|
}
|
|
|
|
|
|
BOOL
|
|
HtGetStringData (
|
|
IN HASHTABLE HashTable,
|
|
IN HASHITEM Index,
|
|
OUT PCVOID *ExtraData
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtGetStringData gets the extra data associated with a bucket item.
|
|
The caller must supply the ID as returned from HtFindStringEx or
|
|
HtAddStringEx. This routine is useful when ExtraData is large, and
|
|
the normal find routine would be slow because of the CopyMemory code path.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the handle to the hash table
|
|
Index - Specifies the offset as returned from HtFindStringEx or
|
|
HtAddStringEx
|
|
ExtraData - Receives the extra data pointer (it does NOT copy the data to
|
|
the buffer).
|
|
|
|
Return Value:
|
|
|
|
TRUE if ExtraData was set, FALSE otherwise.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PBUCKETITEM item;
|
|
PBUCKETITEM_EXTERN_STR externStrItem;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (!Index) {
|
|
return FALSE;
|
|
}
|
|
|
|
if (table->ExternalStrings) {
|
|
|
|
externStrItem = (PBUCKETITEM_EXTERN_STR) Index;
|
|
*ExtraData = (PCVOID) ((PBYTE) externStrItem + sizeof (PBUCKETITEM_EXTERN_STR));
|
|
|
|
} else {
|
|
|
|
item = (PBUCKETITEM) Index;
|
|
*ExtraData = (PCVOID) ((PBYTE) item + sizeof (BUCKETITEM) + item->StringSize);
|
|
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
HtCopyStringData (
|
|
IN HASHTABLE HashTable,
|
|
IN HASHITEM Index,
|
|
OUT PVOID ExtraData
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtCopyStringData gets the extra data associated with a bucket item
|
|
and copies it to the caller's buffer.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the handle to the hash table
|
|
Index - Specifies the offset as returned from HtFindStringEx or
|
|
HtAddStringEx
|
|
ExtraData - Receives the extra data
|
|
|
|
Return Value:
|
|
|
|
TRUE if ExtraData was copied, FALSE otherwise.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PCVOID storedDataPtr;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (!HtGetStringData (HashTable, Index, &storedDataPtr)) {
|
|
return FALSE;
|
|
}
|
|
|
|
CopyMemory (
|
|
(PBYTE) ExtraData,
|
|
(PBYTE) storedDataPtr,
|
|
table->ExtraDataSize
|
|
);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
HtSetStringData (
|
|
IN HASHTABLE HashTable,
|
|
IN HASHITEM Index,
|
|
IN PCVOID ExtraData
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
HtSetStringData copies new extra data to the specified hash table entry.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the handle to the hash table
|
|
Index - Specifies the offset as returned from HtFindStringEx or
|
|
HtAddStringEx
|
|
ExtraData - Specifies the extra data
|
|
|
|
Return Value:
|
|
|
|
TRUE if the item was updated, FALSE otherwise.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
PCVOID storedDataPtr;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (!HtGetStringData (HashTable, Index, &storedDataPtr)) {
|
|
return FALSE;
|
|
}
|
|
|
|
CopyMemory (
|
|
(PBYTE) storedDataPtr,
|
|
(PBYTE) ExtraData,
|
|
table->ExtraDataSize
|
|
);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumFirstHashTableStringA (
|
|
OUT PHASHTABLE_ENUMA EnumPtr,
|
|
IN HASHTABLE HashTable
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
EnumFirstHashTableString begins an enumeration of the hash table structure.
|
|
The return order is random. Also, do not modify the hash table while an
|
|
enumeration is active.
|
|
|
|
Arguments:
|
|
|
|
EnumPtr - Receives the string, extra data and offset for the first item
|
|
in the hash table.
|
|
HashTable - Specifies the handle of the hash table to enumerate.
|
|
|
|
Return Value:
|
|
|
|
TRUE if an item was enumerated, FALSE otherwise.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (table->Unicode) {
|
|
DEBUGMSG ((DBG_WHOOPS, "Cannot enum UNICODE table with ANSI wrapper"));
|
|
return FALSE;
|
|
}
|
|
|
|
ZeroMemory (EnumPtr, sizeof (HASHTABLE_ENUMA));
|
|
|
|
EnumPtr->Internal = (HASHTABLE) table;
|
|
|
|
return EnumNextHashTableStringA (EnumPtr);
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumFirstHashTableStringW (
|
|
OUT PHASHTABLE_ENUMW EnumPtr,
|
|
IN HASHTABLE HashTable
|
|
)
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (!table->Unicode) {
|
|
DEBUGMSG ((DBG_WHOOPS, "Cannot enum ANSI table with UNICODE wrapper"));
|
|
return FALSE;
|
|
}
|
|
|
|
ZeroMemory (EnumPtr, sizeof (HASHTABLE_ENUMW));
|
|
|
|
EnumPtr->Internal = (HASHTABLE) table;
|
|
|
|
return EnumNextHashTableStringW (EnumPtr);
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumNextHashTableStringA (
|
|
IN OUT PHASHTABLE_ENUMA EnumPtr
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
EnumNextHashTableString continues an enumeration started by
|
|
EnumFirstHashTableString. Call the routine until it returns FALSE.
|
|
|
|
Arguments:
|
|
|
|
EnumPtr - Specifies the structure of an active enumeration. Receives
|
|
updated string, extra data and offset members.
|
|
|
|
Return Value:
|
|
|
|
TRUE if another item was enumerated, FALSE if no items remain.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) EnumPtr->Internal;
|
|
PBUCKETITEM item;
|
|
PBUCKETITEM_EXTERN_STR externItem;
|
|
|
|
if (!EnumPtr->Internal) {
|
|
return FALSE;
|
|
}
|
|
|
|
ASSERT_TABLE_IS_VALID (EnumPtr->Internal);
|
|
|
|
if (!EnumPtr->Index) {
|
|
item = table->FirstLink;
|
|
} else {
|
|
item = (PBUCKETITEM) EnumPtr->Index;
|
|
item = item->NextLink;
|
|
}
|
|
|
|
if (item) {
|
|
//
|
|
// Return a valid item
|
|
//
|
|
|
|
EnumPtr->Index = (HASHITEM) item;
|
|
|
|
if (table->ExternalStrings) {
|
|
externItem = (PBUCKETITEM_EXTERN_STR) item;
|
|
EnumPtr->String = (PCSTR) (externItem->String);
|
|
} else {
|
|
EnumPtr->String = (PCSTR) ((PBYTE) item + sizeof (BUCKETITEM));
|
|
}
|
|
|
|
if (table->ExtraDataSize) {
|
|
MYASSERT (EnumPtr->Index);
|
|
(void) HtGetStringData (EnumPtr->Internal, EnumPtr->Index, &EnumPtr->ExtraData);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
EnumPtr->Internal = 0;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumNextHashTableStringW (
|
|
IN OUT PHASHTABLE_ENUMW EnumPtr
|
|
)
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) EnumPtr->Internal;
|
|
PBUCKETITEM item;
|
|
PBUCKETITEM_EXTERN_STR externItem;
|
|
|
|
if (!EnumPtr->Internal) {
|
|
return FALSE;
|
|
}
|
|
|
|
ASSERT_TABLE_IS_VALID (EnumPtr->Internal);
|
|
|
|
if (!EnumPtr->Index) {
|
|
item = table->FirstLink;
|
|
} else {
|
|
item = (PBUCKETITEM) EnumPtr->Index;
|
|
item = item->NextLink;
|
|
}
|
|
|
|
if (item) {
|
|
//
|
|
// Return a valid item
|
|
//
|
|
|
|
EnumPtr->Index = (HASHITEM) item;
|
|
|
|
if (table->ExternalStrings) {
|
|
externItem = (PBUCKETITEM_EXTERN_STR) item;
|
|
EnumPtr->String = (PCWSTR) (externItem->String);
|
|
} else {
|
|
EnumPtr->String = (PCWSTR) ((PBYTE) item + sizeof (BUCKETITEM));
|
|
}
|
|
|
|
if (table->ExtraDataSize) {
|
|
MYASSERT (EnumPtr->Index);
|
|
(void) HtGetStringData (EnumPtr->Internal, EnumPtr->Index, &EnumPtr->ExtraData);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
EnumPtr->Internal = 0;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumHashTableWithCallbackA (
|
|
IN HASHTABLE HashTable,
|
|
IN PHASHTABLE_CALLBACK_ROUTINEA Proc,
|
|
IN LPARAM lParam
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
EnumHashTableWithCallback implements a setupapi-style enumerator. The
|
|
callback routine is called for each item in the string table, and if the
|
|
callback routine returns FALSE, the enumeration ends.
|
|
|
|
Arguments:
|
|
|
|
HashTable - Specifies the handle to the table to enumerate
|
|
Proc - Specifies the callback procedure address
|
|
lParam - Specifies a value to pass to the callback, and is intended only
|
|
for use by the caller.
|
|
|
|
Return Value:
|
|
|
|
Always TRUE.
|
|
|
|
--*/
|
|
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
HASHTABLE_ENUMA e;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (EnumFirstHashTableStringA (&e, HashTable)) {
|
|
do {
|
|
if (!Proc (HashTable, e.Index, e.String, (PVOID) e.ExtraData, table->ExtraDataSize, lParam)) {
|
|
break;
|
|
}
|
|
} while (EnumNextHashTableStringA (&e));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL
|
|
EnumHashTableWithCallbackW (
|
|
IN HASHTABLE HashTable,
|
|
IN PHASHTABLE_CALLBACK_ROUTINEW Proc,
|
|
IN LPARAM lParam
|
|
)
|
|
{
|
|
PHASHTABLESTRUCT table = (PHASHTABLESTRUCT) HashTable;
|
|
HASHTABLE_ENUMW e;
|
|
|
|
ASSERT_TABLE_IS_VALID (HashTable);
|
|
|
|
if (EnumFirstHashTableStringW (&e, HashTable)) {
|
|
do {
|
|
if (!Proc (HashTable, e.Index, e.String, (PVOID) e.ExtraData, table->ExtraDataSize, lParam)) {
|
|
break;
|
|
}
|
|
} while (EnumNextHashTableStringW (&e));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
PCSTR
|
|
HtGetStringFromItemA (
|
|
IN HASHITEM Item
|
|
)
|
|
{
|
|
if (!Item) {
|
|
return NULL;
|
|
}
|
|
|
|
return (PCSTR) ((PBYTE) Item + sizeof (BUCKETITEM));
|
|
}
|
|
|
|
|
|
PCWSTR
|
|
HtGetStringFromItemW (
|
|
IN HASHITEM Item
|
|
)
|
|
{
|
|
if (!Item) {
|
|
return NULL;
|
|
}
|
|
|
|
return (PCWSTR) ((PBYTE) Item + sizeof (BUCKETITEM));
|
|
}
|
|
|