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https://github.com/reactos/reactos.git
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255 lines
8.8 KiB
C
255 lines
8.8 KiB
C
/*
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* Full Pointer Translation Routines
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*
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* Copyright 2006 Robert Shearman
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#define WIN32_NO_STATUS
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#define _INC_WINDOWS
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#include <stdarg.h>
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#include <windef.h>
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#include <winbase.h>
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#include <rpc.h>
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#include <rpcndr.h>
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#include <wine/debug.h>
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WINE_DEFAULT_DEBUG_CHANNEL(rpc);
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PFULL_PTR_XLAT_TABLES WINAPI NdrFullPointerXlatInit(ULONG NumberOfPointers,
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XLAT_SIDE XlatSide)
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{
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ULONG NumberOfBuckets;
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PFULL_PTR_XLAT_TABLES pXlatTables = HeapAlloc(GetProcessHeap(), 0, sizeof(*pXlatTables));
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TRACE("(%d, %d)\n", NumberOfPointers, XlatSide);
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if (!NumberOfPointers) NumberOfPointers = 512;
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NumberOfBuckets = ((NumberOfPointers + 3) & ~3) - 1;
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pXlatTables->RefIdToPointer.XlatTable =
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HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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sizeof(void *) * NumberOfPointers);
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pXlatTables->RefIdToPointer.StateTable =
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HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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sizeof(unsigned char) * NumberOfPointers);
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pXlatTables->RefIdToPointer.NumberOfEntries = NumberOfPointers;
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TRACE("NumberOfBuckets = %d\n", NumberOfBuckets);
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pXlatTables->PointerToRefId.XlatTable =
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HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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sizeof(PFULL_PTR_TO_REFID_ELEMENT) * NumberOfBuckets);
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pXlatTables->PointerToRefId.NumberOfBuckets = NumberOfBuckets;
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pXlatTables->PointerToRefId.HashMask = NumberOfBuckets - 1;
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pXlatTables->NextRefId = 1;
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pXlatTables->XlatSide = XlatSide;
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return pXlatTables;
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}
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void WINAPI NdrFullPointerXlatFree(PFULL_PTR_XLAT_TABLES pXlatTables)
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{
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ULONG i;
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TRACE("(%p)\n", pXlatTables);
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/* free the entries in the table */
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for (i = 0; i < pXlatTables->PointerToRefId.NumberOfBuckets; i++)
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{
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PFULL_PTR_TO_REFID_ELEMENT XlatTableEntry;
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for (XlatTableEntry = pXlatTables->PointerToRefId.XlatTable[i];
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XlatTableEntry; )
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{
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PFULL_PTR_TO_REFID_ELEMENT Next = XlatTableEntry->Next;
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HeapFree(GetProcessHeap(), 0, XlatTableEntry);
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XlatTableEntry = Next;
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}
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}
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HeapFree(GetProcessHeap(), 0, pXlatTables->RefIdToPointer.XlatTable);
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HeapFree(GetProcessHeap(), 0, pXlatTables->RefIdToPointer.StateTable);
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HeapFree(GetProcessHeap(), 0, pXlatTables->PointerToRefId.XlatTable);
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HeapFree(GetProcessHeap(), 0, pXlatTables);
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}
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static void expand_pointer_table_if_necessary(PFULL_PTR_XLAT_TABLES pXlatTables, ULONG RefId)
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{
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if (RefId >= pXlatTables->RefIdToPointer.NumberOfEntries)
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{
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pXlatTables->RefIdToPointer.NumberOfEntries = RefId * 2;
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pXlatTables->RefIdToPointer.XlatTable =
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HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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pXlatTables->RefIdToPointer.XlatTable,
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sizeof(void *) * pXlatTables->RefIdToPointer.NumberOfEntries);
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pXlatTables->RefIdToPointer.StateTable =
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HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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pXlatTables->RefIdToPointer.StateTable,
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sizeof(unsigned char) * pXlatTables->RefIdToPointer.NumberOfEntries);
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if (!pXlatTables->RefIdToPointer.XlatTable || !pXlatTables->RefIdToPointer.StateTable)
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pXlatTables->RefIdToPointer.NumberOfEntries = 0;
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}
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}
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int WINAPI NdrFullPointerQueryPointer(PFULL_PTR_XLAT_TABLES pXlatTables,
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void *pPointer, unsigned char QueryType,
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ULONG *pRefId )
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{
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ULONG Hash = 0;
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unsigned int i;
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PFULL_PTR_TO_REFID_ELEMENT XlatTableEntry;
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TRACE("(%p, %p, %d, %p)\n", pXlatTables, pPointer, QueryType, pRefId);
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if (!pPointer)
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{
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*pRefId = 0;
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return 1;
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}
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/* simple hashing algorithm, don't know whether it matches native */
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for (i = 0; i < sizeof(pPointer); i++)
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Hash = (Hash * 3) ^ ((unsigned char *)&pPointer)[i];
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XlatTableEntry = pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask];
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for (; XlatTableEntry; XlatTableEntry = XlatTableEntry->Next)
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if (pPointer == XlatTableEntry->Pointer)
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{
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*pRefId = XlatTableEntry->RefId;
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if (XlatTableEntry->State & QueryType)
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return 1;
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XlatTableEntry->State |= QueryType;
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return 0;
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}
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XlatTableEntry = HeapAlloc(GetProcessHeap(), 0, sizeof(*XlatTableEntry));
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XlatTableEntry->Next = pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask];
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XlatTableEntry->Pointer = pPointer;
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XlatTableEntry->RefId = *pRefId = pXlatTables->NextRefId++;
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XlatTableEntry->State = QueryType;
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pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask] = XlatTableEntry;
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/* insert pointer into mapping table */
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expand_pointer_table_if_necessary(pXlatTables, XlatTableEntry->RefId);
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if (pXlatTables->RefIdToPointer.NumberOfEntries > XlatTableEntry->RefId)
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{
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pXlatTables->RefIdToPointer.XlatTable[XlatTableEntry->RefId] = pPointer;
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pXlatTables->RefIdToPointer.StateTable[XlatTableEntry->RefId] = QueryType;
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}
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return 0;
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}
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int WINAPI NdrFullPointerQueryRefId(PFULL_PTR_XLAT_TABLES pXlatTables,
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ULONG RefId, unsigned char QueryType,
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void **ppPointer)
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{
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TRACE("(%p, 0x%x, %d, %p)\n", pXlatTables, RefId, QueryType, ppPointer);
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if (!RefId)
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return 1;
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expand_pointer_table_if_necessary(pXlatTables, RefId);
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pXlatTables->NextRefId = max(RefId + 1, pXlatTables->NextRefId);
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if (pXlatTables->RefIdToPointer.NumberOfEntries > RefId)
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{
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*ppPointer = pXlatTables->RefIdToPointer.XlatTable[RefId];
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if (QueryType)
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{
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if (pXlatTables->RefIdToPointer.StateTable[RefId] & QueryType)
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return 1;
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pXlatTables->RefIdToPointer.StateTable[RefId] |= QueryType;
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return 0;
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}
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else
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return 0;
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}
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*ppPointer = NULL;
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return 0;
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}
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void WINAPI NdrFullPointerInsertRefId(PFULL_PTR_XLAT_TABLES pXlatTables,
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ULONG RefId, void *pPointer)
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{
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ULONG Hash = 0;
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unsigned int i;
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PFULL_PTR_TO_REFID_ELEMENT XlatTableEntry;
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TRACE("(%p, 0x%x, %p)\n", pXlatTables, RefId, pPointer);
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/* simple hashing algorithm, don't know whether it matches native */
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for (i = 0; i < sizeof(pPointer); i++)
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Hash = (Hash * 3) ^ ((unsigned char *)&pPointer)[i];
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XlatTableEntry = HeapAlloc(GetProcessHeap(), 0, sizeof(*XlatTableEntry));
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XlatTableEntry->Next = pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask];
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XlatTableEntry->Pointer = pPointer;
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XlatTableEntry->RefId = RefId;
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XlatTableEntry->State = 0;
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pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask] = XlatTableEntry;
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/* insert pointer into mapping table */
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expand_pointer_table_if_necessary(pXlatTables, RefId);
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if (pXlatTables->RefIdToPointer.NumberOfEntries > RefId)
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pXlatTables->RefIdToPointer.XlatTable[XlatTableEntry->RefId] = pPointer;
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}
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int WINAPI NdrFullPointerFree(PFULL_PTR_XLAT_TABLES pXlatTables, void *Pointer)
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{
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ULONG Hash = 0;
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unsigned int i;
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PFULL_PTR_TO_REFID_ELEMENT XlatTableEntry;
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ULONG RefId = 0;
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TRACE("(%p, %p)\n", pXlatTables, Pointer);
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if (!Pointer)
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return 1;
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/* simple hashing algorithm, don't know whether it matches native */
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for (i = 0; i < sizeof(Pointer); i++)
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Hash = (Hash * 3) ^ ((unsigned char *)&Pointer)[i];
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XlatTableEntry = pXlatTables->PointerToRefId.XlatTable[Hash & pXlatTables->PointerToRefId.HashMask];
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for (; XlatTableEntry; XlatTableEntry = XlatTableEntry->Next)
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if (Pointer == XlatTableEntry->Pointer)
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{
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if (XlatTableEntry->State & 0x20)
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return 0;
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XlatTableEntry->State |= 0x20;
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RefId = XlatTableEntry->RefId;
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break;
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}
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if (!XlatTableEntry)
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return 0;
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if (pXlatTables->RefIdToPointer.NumberOfEntries > RefId)
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{
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pXlatTables->RefIdToPointer.StateTable[RefId] |= 0x20;
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return 1;
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}
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return 0;
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}
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