mirror of
https://github.com/nillerusr/source-engine.git
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468 lines
13 KiB
C++
468 lines
13 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================
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#ifndef GCRECORD_H
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#define GCRECORD_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "schema.h"
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#include "tier0/memdbgon.h"
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namespace GCSDK
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{
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#pragma pack( push, 1 )
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class CRecordInfo;
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//-----------------------------------------------------------------------------
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// VarFieldBlockInfo_t
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// Tracks a block of memory used to hold all the variable-length
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// fields for a record.
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//-----------------------------------------------------------------------------
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struct VarFieldBlockInfo_t
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{
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union
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{
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// Take up 64-bits of space now even though
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// pointers are still 32 bits
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uint8* m_pubBlock;
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uint64 _unused;
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};
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uint32 m_cubBlock; // how much is in this block?
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uint32 m_cubBlockFree; // how much in this block is free?
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};
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//-----------------------------------------------------------------------------
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// VarField_t
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// Data format for a variable field entry in a DS record
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// For leaf code, is hidden inside a CVarField or CVarCharField
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//-----------------------------------------------------------------------------
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struct VarField_t
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{
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uint32 m_cubField; // Size of the field
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uint32 m_dubOffset; // Offset of the field within the block
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};
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//-----------------------------------------------------------------------------
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// CVarField
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// Defines a class to encompass a variable-length field - opaque
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//-----------------------------------------------------------------------------
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class CVarField : private VarField_t
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{
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public:
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friend class CRecordVar;
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private:
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};
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//-----------------------------------------------------------------------------
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// CVarCharField
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// Defines a class to encompass a variable-length string field - opaque
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//-----------------------------------------------------------------------------
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class CVarCharField : public CVarField
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{
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public:
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friend class CRecordVar;
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};
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//-----------------------------------------------------------------------------
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// CVarCharField
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// Defines a class to encompass a variable-length string field - opaque
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//-----------------------------------------------------------------------------
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class CVarBinaryField : public CVarField
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{
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public:
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friend class CRecordVar;
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};
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//-----------------------------------------------------------------------------
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// CImageField
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// Defines a class to encompass a long variable-length binary field - opaque
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//-----------------------------------------------------------------------------
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class CImageField : public CVarField
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{
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public:
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friend class CRecordVar;
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};
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#pragma pack( pop )
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// fix the size of this just to be safe
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#pragma pack( push, 4 )
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class CSchema;
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//-----------------------------------------------------------------------------
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// CRecordBase
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// Defines a class which arbitrates access to a fixed-length record
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//
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// This is used as a base class for the CSchTable wrapper classes emitted
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// by the schema compiler when the involved table has no variable length data.
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//-----------------------------------------------------------------------------
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class CRecordBase
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{
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public:
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// These both allocate new space and COPY the record data into it
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CRecordBase( const CRecordBase &that );
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CRecordBase &operator=(const CRecordBase &that);
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// Init from general memory
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int InitFromBytes( uint8 *pubRecord );
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virtual ~CRecordBase();
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// Use these when sending records over the wire
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uint32 CubSerialized();
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virtual uint8 *PubRecordFixed();
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const uint8 *PubRecordFixed() const;
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uint32 CubRecordFixed() const;
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virtual uint8 *PubRecordVarBlock();
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virtual const uint8 *PubRecordVarBlock() const;
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uint32 CubRecordVarBlock() const;
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bool BAssureRecordVarStorage( uint32 cVariableBytes );
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// generic data accessors
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bool BGetField( int iField, uint8 **ppubData, uint32 *pcubField ) const;
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virtual bool BSetField( int iField, void * pvData, uint32 cubData );
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virtual void WipeField( int iField );
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// data accessors
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const char * GetStringField( int iField, uint32 *pcubField );
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int GetInt( int iField );
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uint16 GetUint16( int iField );
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uint32 GetUint32( int iField );
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uint64 GetUint64( int iField );
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// variable length data accessors
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// (not implemented by this class)
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virtual const char *ReadVarCharField( const CVarCharField &field ) const;
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virtual const uint8 *ReadVarDataField( const CVarField &field, uint32 *pcubField ) const;
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virtual bool SetVarCharField( CVarCharField &field, const char *pchString, bool bTruncate, int32 iField );
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virtual void SetVarDataField( CVarField &field, const void *pvData, uint32 cubData );
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virtual const CSchema *GetPSchema() const
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{
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return const_cast<CRecordBase*>(this)->GetPSchema();
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}
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virtual CSchema *GetPSchema();
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const CRecordInfo *GetPRecordInfo() const;
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// implemented by CSch-something derivatives
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virtual int GetITable() const = 0;
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void RenderField( uint32 unColumn, int cchBuffer, char *pchBuffer ) const;
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#ifdef DBGFLAG_VALIDATE
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void Validate( CValidator &validator, const char *pchName ); // Validate our internal structures
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static void ValidateStatics( CValidator &validator, const char *pchName );
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#endif // DBGFLAG_VALIDATE
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protected:
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// copies the contents of the record. The assignement operator uses this internally
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virtual void Copy( const CRecordBase & that );
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CSchema *GetPSchemaImpl();
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void Cleanup();
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bool BSetField( int iField, void *pvData, uint32 cubData, bool *pbRealloced );
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// ctor for derived classes, CSch*
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CRecordBase( ) { }
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};
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//-----------------------------------------------------------------------------
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// CRecordVar
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// Defines a class which arbitrates access to a variable-length record
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//
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// This is used as a base class for the CSchTable wrapper classes emitted
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// by the schema compiler when the involved table *does* have variable-length data
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//-----------------------------------------------------------------------------
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class CRecordVar : public CRecordBase
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{
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public:
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CRecordVar( )
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{
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m_pSchema = NULL;
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m_nFlags = 0;
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}
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virtual ~CRecordVar()
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{
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Cleanup();
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}
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virtual uint8* PubRecordFixed();
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const uint8 *PubRecordFixed() const;
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virtual CSchema *GetPSchema()
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{
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return m_pSchema;
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}
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virtual const CSchema *GetPSchema() const
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{
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return m_pSchema;
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}
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// Init from general memory
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int InitFromBytes( uint8 *pubRecord );
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// generic data accessors
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virtual bool BSetField( int iField, void * pvData, uint32 cubData );
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virtual void WipeField( int iField );
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// variable-length data accessors
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virtual const char *ReadVarCharField( const CVarCharField &field ) const;
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virtual const uint8 *ReadVarDataField( const CVarField &field, uint32 *pcubField ) const;
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virtual bool SetVarCharField( CVarCharField &field, const char *pchString, bool bTruncate, int32 iField );
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virtual void SetVarDataField( CVarField &field, const void *pvData, uint32 cubData );
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// allocated fixed means we've got our own memory for the fixed record
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// allocated var block means we've allocated a block for the variable part of this record
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enum EFlags { k_EAllocatedFixed = 0x1, k_EAllocatedVarBlock = 0x2 };
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bool BFlagSet( int eFlag ) const;
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#ifdef DBGFLAG_VALIDATE
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void Validate( CValidator &validator, const char *pchName ); // Validate our internal structures
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#endif // DBGFLAG_VALIDATE
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protected:
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// copies the contents of the record. The assignement operator uses this internally
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virtual void Copy( const CRecordBase & that );
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// initialization helper
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void DoInit()
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{
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m_pSchema = CRecordBase::GetPSchema();
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}
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void SetFlag( int eFlag, bool bSet );
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void Cleanup();
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CSchema *m_pSchema; // Corresponding Schema
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int m_nFlags; // Flags about the record memory allocations / location
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};
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//-----------------------------------------------------------------------------
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// CRecordExternal
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// Defines a class which arbitrates access to a variable-length record
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//
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// This is used as an accessor for a polymorphic record. It can be used to
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// read CSchTable records when the type is unknown, manipulate stats records,
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// or touch data that isn't preallocated. Its use is relatively rare.
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//-----------------------------------------------------------------------------
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class CRecordExternal : public CRecordVar
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{
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public:
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CRecordExternal()
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{
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m_pubRecordFixedExternal = NULL;
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m_nFlags = 0;
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}
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virtual ~CRecordExternal()
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{
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Cleanup();
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}
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virtual uint8* PubRecordFixed();
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const uint8 *PubRecordFixed() const;
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void DeSerialize( uint8 *pubData );
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int GetITable() const
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{
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return -1;
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}
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void Init( CSchema *pSchema );
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int Init( CSchema *pSchema, uint8 *pubRecord, bool bTakeOwnership );
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// test helpers
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void InitRecordRandom( uint32 unPrimaryIndex );
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void SetFieldRandom( int iField );
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#ifdef DBGFLAG_VALIDATE
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void Validate( CValidator &validator, const char *pchName ); // Validate our internal structures
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#endif // DBGFLAG_VALIDATE
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protected:
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// copies the contents of the record. The assignement operator uses this internally
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virtual void Copy( const CRecordBase & that );
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void Cleanup();
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void DoInit()
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{
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m_pSchema = CRecordBase::GetPSchema();
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}
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uint8 *m_pubRecordFixedExternal; // If the fixed record is not a part of this object,
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// this points to where it is
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CSchema *GetPSchemaImpl();
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};
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//-----------------------------------------------------------------------------
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// Accessors for variable length character data.
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// These goofy little macros implement some syntax sugar
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//-----------------------------------------------------------------------------
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#define READ_VAR_CHAR_FIELD( record, field )\
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(record).ReadVarCharField( (record).field )
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#define WRITE_VAR_CHAR_FIELD( record, field, text )\
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(record).SetVarCharField( (record).m_##field, text, false, (record).k_iField_##field )
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#define WRITE_VAR_CHAR_FIELD_TRUNC( record, field, text )\
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(record).SetVarCharField( (record).m_##field, text, true, (record).k_iField_##field )
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#pragma pack( pop )
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//-----------------------------------------------------------------------------
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// Template classes that get a LessFunc that sorts CRecordBases by a field
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// within them
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//-----------------------------------------------------------------------------
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template <class T, int I, typename F>
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class CDefSchOps
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{
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public:
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static bool LessFunc( const T &lhs, const T &rhs )
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{
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// Check that the field number is valid
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COMPILE_TIME_ASSERT( I >= 0 && I < T::k_iFieldMax );
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// Check to make sure this is a fixed field
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const Field_t &fieldInfo = lhs.GetPSchema()->GetField( I );
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Assert( !fieldInfo.BIsStringType() && !fieldInfo.BIsVariableLength() );
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if ( fieldInfo.BIsStringType() || fieldInfo.BIsVariableLength() )
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return false;
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// Read the data and make sure the sizes are correct for the field type we expect
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uint8 *pubLhs;
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uint8 *pubRhs;
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bool bRet;
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uint32 cubRead;
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bRet = lhs.BGetField( I, &pubLhs, &cubRead );
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Assert( bRet && cubRead == sizeof( F ) );
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if ( !bRet || cubRead != sizeof( F ) )
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return false;
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bRet = rhs.BGetField( I, &pubRhs, &cubRead );
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Assert( bRet && cubRead == sizeof( F ) );
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if ( !bRet || cubRead != sizeof( F ) )
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return false;
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// Finally do the comparison
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return ( *( (F *)pubLhs ) ) < ( *( (F *)pubRhs ) );
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}
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static bool LessFuncCtx( const T &lhs, const T &rhs, void *pCtx )
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{
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return LessFunc( lhs, rhs );
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}
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};
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#define DefSchLessFunc( RecordType, FieldIndex, FieldType ) CDefSchOps<RecordType, FieldIndex, FieldType>::LessFunc
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#define DefSchLessFuncCtx( RecordType, FieldIndex, FieldType ) CDefSchOps<RecordType, FieldIndex, FieldType>::LessFuncCtx
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//-----------------------------------------------------------------------------
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// Specializations for string fields
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//-----------------------------------------------------------------------------
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template <class T, int I>
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class CDefSchOps<T, I, char *>
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{
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public:
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static bool LessFunc( const T &lhs, const T &rhs )
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{
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// Check that the field number is valid
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COMPILE_TIME_ASSERT( I >= 0 && I < T::k_iFieldMax );
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// Check to make sure this is indeed a string field
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Field_t &fieldInfo = lhs.GetPSchema()->GetField( I );
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Assert( fieldInfo.BIsStringType() );
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if ( !fieldInfo.BIsStringType() )
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return false;
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// Read the data
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uint32 cubRead;
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const char *pchLhs = lhs.GetStringField( I, &cubRead );
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const char *pchRhs = rhs.GetStringField( I, &cubRead );
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// Finally do the comparison
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return CDefOps<const char *>::LessFunc( lhs, rhs );
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}
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static bool LessFuncCtx( const T &lhs, const T &rhs, void *pCtx )
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{
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return LessFunc( lhs, rhs );
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}
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};
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template <class T, int I>
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class CDefSchOps<T, I, const char *>
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{
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public:
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static bool LessFunc( const T &lhs, const T &rhs )
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{
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return CDefSchOps<T, I, char *>::LessFunc( lhs, rhs );
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}
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static bool LessFuncCtx( const T &lhs, const T &rhs, void *pCtx )
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{
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return LessFunc( lhs, rhs );
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}
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};
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//-----------------------------------------------------------------------------
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// Purpose: Provide a convenient object to pass around to represent a type
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// of record
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//-----------------------------------------------------------------------------
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class CRecordType
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{
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public:
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virtual int GetITable() const = 0;
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virtual CRecordBase *Create() const = 0;
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CSchema *GetSchema() const;
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CRecordInfo *GetRecordInfo() const;
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protected:
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private:
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};
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template <typename TRecord>
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class CRecordTypeConcrete: public CRecordType
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{
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public:
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virtual int GetITable() const { return TRecord::k_iTable; }
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virtual CRecordBase *Create() const { return new TRecord(); }
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};
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#define RTYPE( recordClass ) CRecordTypeConcrete<recordClass>()
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} // namespace GCSDK
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#include "tier0/memdbgoff.h"
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#endif // GCRECORD_H
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