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#ifndef _CODEGEN_HXX
#define _CODEGEN_HXX

class SbiImage;
class SbiParser;
class SbModule;
#include "opcodes.hxx"
#include "buffer.hxx"

class SbiCodeGen {
    SbiParser* pParser;         // for error messages, line, column etc.
    SbModule& rMod;
    SbiBuffer aCode;
    short  nLine, nCol;         // for stmnt command
    short  nForLevel;           // #29955
    sal_Bool bStmnt;            // sal_True: statement-opcode is pending
public:
    SbiCodeGen( SbModule&, SbiParser*, short );
    SbiParser* GetParser() { return pParser; }
    SbModule& GetModule() { return rMod; }
    sal_uInt32 Gen( SbiOpcode );
    sal_uInt32 Gen( SbiOpcode, sal_uInt32 );
    sal_uInt32 Gen( SbiOpcode, sal_uInt32, sal_uInt32 );
    void Patch( sal_uInt32 o, sal_uInt32 v ){ aCode.Patch( o, v ); }
    void BackChain( sal_uInt32 off )    { aCode.Chain( off );  }
    void Statement();
    void GenStmnt();            // create statement-opcode maybe
    sal_uInt32 GetPC();
    sal_uInt32 GetOffset()              { return GetPC() + 1; }
    void Save();

    // #29955 service for-loop-level
    void IncForLevel( void ) { nForLevel++; }
    void DecForLevel( void ) { nForLevel--; }

    static sal_uInt32 calcNewOffSet( sal_uInt8* pCode, sal_uInt16 nOffset );
    static sal_uInt16 calcLegacyOffSet( sal_uInt8* pCode, sal_uInt32 nOffset );

};

template < class T, class S >
class PCodeBuffConvertor
{
    T m_nSize; //
    sal_uInt8* m_pStart;
    sal_uInt8* m_pCnvtdBuf;
    S m_nCnvtdSize; //

    //  Disable usual copying symantics and bodgy default ctor
    PCodeBuffConvertor();
    PCodeBuffConvertor(const PCodeBuffConvertor& );
    PCodeBuffConvertor& operator = ( const PCodeBuffConvertor& );
public:
    PCodeBuffConvertor( sal_uInt8* pCode, T nSize ): m_nSize( nSize ),  m_pStart( pCode ), m_pCnvtdBuf( NULL ), m_nCnvtdSize( 0 ){ convert(); }
    S GetSize(){ return m_nCnvtdSize; }
    void convert();
    // Caller owns the buffer returned
    sal_uInt8* GetBuffer() { return m_pCnvtdBuf; }
};

// #111897 PARAM_INFO flags start at 0x00010000 to not
// conflict with DefaultId in SbxParamInfo::nUserData
#define PARAM_INFO_PARAMARRAY       0x0010000
#define PARAM_INFO_WITHBRACKETS     0x0020000

#endif

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