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130 lines
4.0 KiB
130 lines
4.0 KiB
//============== DAE: OS/2 Database Access Engine ===================
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//============== recint.h: Record Manager Internals ===================
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#define cbLVIntrinsicMost 1024
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#define cbRECRecordMost cbNodeMost - cbNullKeyData - JET_cbKeyMost
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// 4044 - 8 - 255 = 3781
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#define fidFixedLeast 1
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#define fidVarLeast 128
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#define fidTaggedLeast 256
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#define fidTaggedMost (0x7fff)
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#define fidFixedMost (fidVarLeast-1)
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#define fidVarMost (fidTaggedLeast-1)
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#define FFixedFid(fid) ((fid)<=fidFixedMost && (fid)>=fidFixedLeast)
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#define FVarFid(fid) ((fid)<=fidVarMost && (fid)>=fidVarLeast)
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#define FTaggedFid(fid) ((fid)<=fidTaggedMost && (fid)>=fidTaggedLeast)
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// Used to get offset from 2-byte VarOffset which includes null-bit
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#define ibVarOffset(ibVarOffs) ( (ibVarOffs) & 0x0fff)
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#define FVarNullBit(ibVarOffs) ( (ibVarOffs) & 0x8000)
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#define SetNullBit(ibVarOffs) ( (ibVarOffs) |= 0x8000)
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#define ResetNullBit(ibVarOffs) ( (ibVarOffs) &= 0x7fff)
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// Used to flip highest bit of signed fields when transforming.
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#define maskByteHighBit (1 << (sizeof(BYTE)*8-1))
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#define maskWordHighBit (1 << (sizeof(WORD)*8-1))
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#define maskDWordHighBit (1L << (sizeof(ULONG)*8-1))
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#define bFlipHighBit(b) ((BYTE)((b) ^ maskByteHighBit))
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#define wFlipHighBit(w) ((WORD)((w) ^ maskWordHighBit))
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#define ulFlipHighBit(ul) ((ULONG)((ul) ^ maskDWordHighBit))
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/* The following are disk structures -- so pack 'em
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/**/
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#pragma pack(1)
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/* long column id is big-endian long
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/**/
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typedef LONG LID;
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/* long value column in record format
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/**/
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typedef struct
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{
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BYTE fSeparated;
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union
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{
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LID lid;
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BYTE rgb[];
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};
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} LV;
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/* long value root data format
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/**/
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typedef struct
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{
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ULONG ulReference;
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ULONG ulSize;
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} LVROOT;
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#pragma pack()
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#define fIntrinsic (BYTE)0
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#define fSeparate (BYTE)1
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#define FFieldIsSLong( pb ) ( ((LV *)(pb))->fSeparated )
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#define LidOfLV( pb ) ( ((LV *)(pb))->lid )
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#define FlagIntrinsic( pb ) ( ((LV *)(pb))->fSeparated = fIntrinsic )
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#define FlagSeparate( pb ) ( ((LV *)(pb))->fSeparated = fSeparate )
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#define fLVReference 0
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#define fLVDereference 1
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#define ErrRECResetSLongValue( pfucb, plid ) \
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ErrRECAffectSeparateLV( pfucb, plid, fLVDereference )
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#define ErrRECReferenceLongValue( pfucb, plid ) \
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ErrRECAffectSeparateLV( pfucb, plid, fLVReference )
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#define ErrRECDereferenceLongValue( pfucb, plid ) \
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ErrRECAffectSeparateLV( pfucb, plid, fLVDereference )
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/* The following are disk structures -- so pack 'em
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/**/
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#pragma pack(1)
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// Record header (beginning of every data record)
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typedef struct _rechdr
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{
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BYTE fidFixedLastInRec; // highest fixed fid represented in record
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BYTE fidVarLastInRec; // highest var fid represented in record
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} RECHDR;
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// Structure imposed upon a tagged field occurance in a record
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typedef struct _tagfld
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{
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FID fid; // field id of occurance
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WORD cb; // length of following data
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BYTE rgb[]; // data (extends off the end of the structure)
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} TAGFLD;
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#pragma pack()
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ULONG UlChecksum( BYTE *pb, ULONG cb );
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ERR ErrRECChangeIndex( FUCB *pfucb, CHAR *szIndex );
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BOOL FRECIIllegalNulls( FDB *pfdb, LINE *plineRec );
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ERR ErrRECIRetrieve( FUCB *pfucb, FID *pfid, ULONG itagSequence, LINE *plineField, ULONG grbit );
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BOOL FOnCopyBuffer( FUCB *pfucb );
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ERR ErrRECIModifyField( FUCB *pfucb, FID fid, ULONG itagSequence, LINE *plineField );
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ERR ErrRECSetLongField(
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FUCB *pfucb,
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FID fid,
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ULONG itagSequence,
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LINE *plineField,
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JET_GRBIT grbit,
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LONG ibOffset,
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ULONG ulMax );
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ERR ErrRECRetrieveSLongField(
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FUCB *pfucb,
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LID lid,
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ULONG ibGraphic,
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BYTE *pb,
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ULONG cbMax,
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ULONG *pcbActual );
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ERR ErrRECDeleteLongFields( FUCB *pfucb, LINE *plineRecord );
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ERR ErrRECAffectLongFields( FUCB *pfucb, LINE *plineRecord, INT fAll );
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#define fSeparateAll (INT)0
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#define fReference (INT)1
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#define fDereference (INT)2
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#define fDereferenceRemoved (INT)3
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#define fDereferenceAdded (INT)4
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