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table.h
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table.h
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//
// File: Table.h
//
//
// Class code:MetaData::Table represents a MetaData table.
//
// ======================================================================================
#pragma once
#include "external.h"
namespace MetaData
{
// --------------------------------------------------------------------------------------
//
// This class represents a read-only MetaData table (a continuous chunk of data).
//
class TableRO
{
friend class TableRW;
private:
//
// Private data
//
BYTE *m_pData;
public:
//
// Initialization
//
__checkReturn
inline HRESULT Initialize(
__range(2, UINT32_MAX) UINT32 cbRecordSize,
DataBlob sourceData,
BOOL fCopyData)
{
_ASSERTE(!fCopyData);
_ASSERTE((cbRecordSize == 0) || (sourceData.GetSize() % cbRecordSize == 0));
m_pData = sourceData.GetDataPointer();
return S_OK;
}
// Destroys the table and all its allocated data. Can run on uninitialized table.
inline void Delete()
{
m_pData = NULL;
}
public:
//
// Getters
//
__checkReturn
inline HRESULT GetRecord(
UINT32 nRowIndex,
_Outptr_opt_ BYTE **ppRecord,
UINT32 cbRecordSize,
UINT32 cRecordCount,
UINT32 nTableIndex)
{
if ((nRowIndex == 0) || (nRowIndex > cRecordCount))
{
Debug_ReportError("Invalid record index.");
*ppRecord = NULL;
return CLDB_E_INDEX_NOTFOUND;
}
*ppRecord = m_pData + (nRowIndex - 1) * cbRecordSize;
return S_OK;
} // TableRO::GetRecord
}; // class TableRO
// --------------------------------------------------------------------------------------
//
// This class represents a read-write MetaData table.
//
class TableRW
{
private:
//
// Private data
//
// The storage of table records.
RecordPool m_RecordStorage;
public:
//
// Initialization
//
// Initializes (empty) table of record size (cbRecordSize) with new allocated data for cRecordCount
// records.
__checkReturn
inline HRESULT InitializeEmpty_WithRecordCount(
__range(2, UINT32_MAX) UINT32 cbRecordSize,
__range(0, UINT32_MAX) UINT32 cRecordCount
COMMA_INDEBUG_MD( BOOL debug_fIsReadWrite))
{
return m_RecordStorage.InitNew(cbRecordSize, cRecordCount);
}
__checkReturn
inline HRESULT Initialize(
__range(2, UINT32_MAX) UINT32 cbRecordSize,
DataBlob sourceData,
BOOL fCopyData)
{
return m_RecordStorage.InitOnMem(cbRecordSize, sourceData.GetDataPointer(), sourceData.GetSize(), !fCopyData);
}
__checkReturn
inline HRESULT InitializeFromTable(
const TableRO *pSourceTable,
UINT32 cbRecordSize,
UINT32 cRecordCount,
BOOL fCopyData)
{
return m_RecordStorage.InitOnMem(cbRecordSize, pSourceTable->m_pData, cbRecordSize * cRecordCount, !fCopyData);
}
__checkReturn
inline HRESULT InitializeFromTable(
const TableRW *pSourceTable,
BOOL fCopyData)
{
_ASSERTE(fCopyData);
return m_RecordStorage.ReplaceContents(const_cast<RecordPool *>(&pSourceTable->m_RecordStorage));
}
// Destroys the table and all its allocated data. Can run on uninitialized table.
inline void Delete()
{
return m_RecordStorage.Uninit();
}
public:
//
// Getters
//
inline UINT32 GetRecordCount() const
{
return const_cast<RecordPool &>(m_RecordStorage).Count();
}
inline HRESULT GetRecordsDataSize(UINT32 *pcbSize) const
{
return m_RecordStorage.GetSaveSize(pcbSize);
}
__checkReturn
inline HRESULT GetRecord(
UINT32 nIndex,
_Outptr_opt_ BYTE **ppRecord)
{
return m_RecordStorage.GetRecord(nIndex, ppRecord);
}
__checkReturn
inline HRESULT SaveToStream(
IStream *pStream) const
{
return const_cast<RecordPool &>(m_RecordStorage).PersistToStream(pStream);
}
public:
//
// Setters
//
__checkReturn
inline HRESULT AddRecord(
_Out_ BYTE **ppbRecord,
_Out_ UINT32 *pnIndex)
{
return m_RecordStorage.AddRecord(ppbRecord, pnIndex);
}
__checkReturn
inline HRESULT InsertRecord(
UINT32 nIndex,
BYTE **ppbRecord)
{
return m_RecordStorage.InsertRecord(nIndex, ppbRecord);
}
// Makes table data writable, i.e. copies them into newly allocated chunk of memory. The caller
// guarantees that the table is not writable yet (otherwise this method asserts).
//
// Returns S_OK (even if the table is empty).
// Returns METADATA_E_INTERNAL_ERROR error code if the table has more segments.
__checkReturn
inline HRESULT MakeWritable()
{
return m_RecordStorage.ConvertToRW();
}
#ifdef _DEBUG_METADATA
// Sets table information for debugging.
void Debug_SetTableInfo(const char *szTableName, UINT32 nTableIndex)
{
}
#endif //_DEBUG_METADATA
}; // class TableRW
}; // namespace MetaData