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105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
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* PROJECT: registry manipulation library
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* LICENSE: GPL - See COPYING in the top level directory
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* COPYRIGHT: Copyright 2005 Filip Navara <navaraf@reactos.org>
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* Copyright 2005 Hartmut Birr
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* Copyright 2001 - 2005 Eric Kohl
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*/
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#include "cmlib.h"
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PHBIN CMAPI
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HvpAddBin(
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PHHIVE RegistryHive,
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ULONG Size,
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HSTORAGE_TYPE Storage)
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{
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PHMAP_ENTRY BlockList;
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PHBIN Bin;
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SIZE_T BinSize;
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ULONG i;
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ULONG BitmapSize;
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ULONG BlockCount;
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ULONG OldBlockListSize;
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PHCELL Block;
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BinSize = ROUND_UP(Size + sizeof(HBIN), HV_BLOCK_SIZE);
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BlockCount = (ULONG)(BinSize / HV_BLOCK_SIZE);
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Bin = RegistryHive->Allocate(BinSize, TRUE, TAG_CM);
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if (Bin == NULL)
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return NULL;
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RtlZeroMemory(Bin, BinSize);
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Bin->Signature = HV_BIN_SIGNATURE;
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Bin->FileOffset = RegistryHive->Storage[Storage].Length *
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HV_BLOCK_SIZE;
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Bin->Size = (ULONG)BinSize;
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/* Allocate new block list */
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OldBlockListSize = RegistryHive->Storage[Storage].Length;
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BlockList = RegistryHive->Allocate(sizeof(HMAP_ENTRY) *
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(OldBlockListSize + BlockCount),
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TRUE,
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TAG_CM);
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if (BlockList == NULL)
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{
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RegistryHive->Free(Bin, 0);
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return NULL;
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}
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if (OldBlockListSize > 0)
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{
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RtlCopyMemory(BlockList, RegistryHive->Storage[Storage].BlockList,
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OldBlockListSize * sizeof(HMAP_ENTRY));
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RegistryHive->Free(RegistryHive->Storage[Storage].BlockList, 0);
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}
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RegistryHive->Storage[Storage].BlockList = BlockList;
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RegistryHive->Storage[Storage].Length += BlockCount;
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for (i = 0; i < BlockCount; i++)
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{
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RegistryHive->Storage[Storage].BlockList[OldBlockListSize + i].BlockAddress =
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((ULONG_PTR)Bin + (i * HV_BLOCK_SIZE));
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RegistryHive->Storage[Storage].BlockList[OldBlockListSize + i].BinAddress = (ULONG_PTR)Bin;
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}
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/* Initialize a free block in this heap. */
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Block = (PHCELL)(Bin + 1);
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Block->Size = (LONG)(BinSize - sizeof(HBIN));
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if (Storage == Stable)
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{
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/* Calculate bitmap size in bytes (always a multiple of 32 bits). */
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BitmapSize = ROUND_UP(RegistryHive->Storage[Stable].Length,
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sizeof(ULONG) * 8) / 8;
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/* Grow bitmap if necessary. */
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if (BitmapSize > RegistryHive->DirtyVector.SizeOfBitMap / 8)
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{
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PULONG BitmapBuffer;
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BitmapBuffer = RegistryHive->Allocate(BitmapSize, TRUE, TAG_CM);
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RtlZeroMemory(BitmapBuffer, BitmapSize);
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if (RegistryHive->DirtyVector.SizeOfBitMap > 0)
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{
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ASSERT(RegistryHive->DirtyVector.Buffer);
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RtlCopyMemory(BitmapBuffer,
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RegistryHive->DirtyVector.Buffer,
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RegistryHive->DirtyVector.SizeOfBitMap / 8);
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RegistryHive->Free(RegistryHive->DirtyVector.Buffer, 0);
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}
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RtlInitializeBitMap(&RegistryHive->DirtyVector, BitmapBuffer,
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BitmapSize * 8);
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}
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/* Mark new bin dirty. */
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RtlSetBits(&RegistryHive->DirtyVector,
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Bin->FileOffset / HV_BLOCK_SIZE,
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BlockCount);
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}
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return Bin;
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}
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