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241 lines
6.4 KiB
Plaintext
241 lines
6.4 KiB
Plaintext
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; File: DataAccessMgr.a
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;
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; Contains: Data Access Manager (codename SnarfMan) dispatch table, plus
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; other misc. assembly routines.
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;
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; Written by: Jeff Miller
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;
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; Copyright: © 1989-1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <10> 3/13/92 JSM Renamed this file DataAccessMgr.a from SnarfMan.a, keeping all
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; the old revisions.
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; <9> 6/12/91 JSM Completely delete about box code, which hasn't been used since
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; revision 6 anyway.
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; <8> 3/4/91 dba dty: get rid of extraneous forROM and SysVers stuff and turn off
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; debugging symbols
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; <7> 4/25/90 JSM Unimplement QuitDBPack.
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; <6> 4/2/90 JSM Use DBRA in mymemclear, remove pstrcpy (replaced by a macro), no
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; more about box.
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; <5> 3/13/90 JSM Bump version in header, change names of ResultsHandler routines
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; to ResultHandler.
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; <4> 3/12/90 JSM Move SnarfManCR to SnarfCompletion.a.
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; <3> 2/26/90 JSM Get rid of SnarfDispatch, now use PACKHelper, bump version in
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; header.
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; <2> 12/20/89 JSM Update to use public includes.
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; <2.4> 11/7/89 JSM Bumped version expected on InitDBPack.
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; <2.3> 11/6/89 JSM Fixed a bug cleaning up the stack for a bad selector or when the
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; package was not inited.
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; <2.2> 10/6/89 JSM Updated to make SnarfMan a PACK.
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; <2.1> 9/18/89 JSM General cleanup.
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; <2.0> 8/29/89 JSM Updated for new version 2 API.
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; <1.8> 8/7/89 JSM Added kill and results-to-text stuff to jump table.
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; <1.7> 7/19/89 JSM Changed 'type' to 'dataType' in several places.
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; <1.6> 7/15/89 JSM Async stuff works now.
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; <1.5> 6/22/89 JSM Updated async stuff.
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; <1.4> 6/9/89 JSM Added more stuff to support async, not quite working yet.
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; <1.3> 5/31/89 JSM Added GetGlobals, pstrcpy, and mymemclear routines.
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; <1.2> 5/18/89 JSM Now use EMT's jump table technique.
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; <1.1> 4/28/89 JSM Changed DBDisposQuery to DBDisposeQuery.
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; <1.0> 4/11/89 JSM Added to EASE for the first time.
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;
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TITLE 'DataAccessMgr.a'
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STRING ASIS
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CASE OBJ
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;
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; Define DataAccessDebug to get MacsBug labels
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;
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; IF &TYPE('DataAccessDebug')='UNDEFINED' THEN
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DataAccessDebug EQU 0
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; ENDIF
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; Includes
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PRINT OFF
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LOAD 'StandardEqu.d'
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INCLUDE 'DatabaseAccess.a'
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PRINT ON
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;
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; Macro to put in debug symbols for MacsBug
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;
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IF DataAccessDebug THEN
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MACRO
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DoDebugSymbols &name
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DC.B $80 + &LEN(&name), '&name'
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DC.W $0000
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ENDM
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ENDIF
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;===============================================================================
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;
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; PROCEDURE DataAccessPackEntry(); - entry point for the Data Access Mgr
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;
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;===============================================================================
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DataAccessPackEntry PROC EXPORT
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DC.W $A9FF ; package entry point (unused now)
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DC.B 'PACK'
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DC.W 13 ; package number
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DC.W 4 ; version
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;
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; DispatchTable for DispatchHelper
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;
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MyDispatchTable
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DC.W 0 ; dispatchFlags (always 0)
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DC.B $FF ; first selector (-1 for DBIdle)
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DC.B $16 ; last selector (22 for DBGetResultsHandler)
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;
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; macro to build jump table
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;
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MACRO
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JT &entry
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IMPORT &entry
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DC.W &entry - MyDispatchTable
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ENDM
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CASE OFF ; following are Pascal routines
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JT SMIdle ; private routines
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JT SMInitDBPack ; public routines
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;
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; The following entry used to be SMQuitDBPack, which is no longer implemented.
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; DispatchHelper will return paramErr when it sees the DispatchTable entry is
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; now 0.
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;
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DC.W 0
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JT SMInit
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JT SMEnd
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JT SMGetConnInfo
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JT SMGetSessionNum
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JT SMSend
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JT SMSendItem
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JT SMExec
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JT SMState
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JT SMGetErr
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JT SMBreak
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JT SMGetItem
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JT SMUnGetItem
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JT SMKill
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JT SMGetNewQuery
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JT SMDisposeQuery
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JT SMStartQuery
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JT SMGetQueryResults
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JT SMResultsToText
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JT SMInstallResultHandler
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JT SMRemoveResultHandler
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JT SMGetResultHandler
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CASE OBJ
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;===============================================================================
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;
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; snarfGlobPtr GetGlobals() - Return Data Access Mgr globals.
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;
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;===============================================================================
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GetGlobals PROC EXPORT
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WITH ExpandMemRec ; for referencing globals
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MOVE.L ExpandMem, A0 ; get expanded memory area
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MOVE.L emSnarfGlobals(A0), D0 ; return globals
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ENDWITH ; ExpandMemRec
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RTS
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IF DataAccessDebug THEN
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DoDebugSymbols GetGlobals ; label for MacsBug
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ENDIF
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ENDPROC ;end of GetGlobals
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;===============================================================================
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;
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; Ptr GetGlobalsPtr(); - Return a pointer to the emSnarfGlobals field
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; in the ExpandMem record.
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;
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;===============================================================================
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GetGlobalsPtr PROC EXPORT
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WITH ExpandMemRec ; for referencing globals
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MOVE.L ExpandMem, D0 ; get expanded memory area
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ADD.L #emSnarfGlobals, D0 ; get pointer to global pointer
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ENDWITH ; ExpandMemRec
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RTS
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IF DataAccessDebug THEN
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DoDebugSymbols GetGlobalsPtr ; label for MacsBug
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ENDIF
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ENDPROC ; end of GetGlobalsPtr
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;===============================================================================
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;
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; void mymemclear(char *s, long size); - Clears memory.
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;
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; Assumes size is greater than 0.
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;
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;===============================================================================
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mymemclear PROC EXPORT
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MOVE.L 4(A7), A0 ; A0 = src
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MOVE.L 8(A7), D0 ; D0 = size
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SUBQ #1, D0 ; D0 = D0 - 1 for DBRA
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lLoop
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MOVE.B #0, (A0)+ ; zero byte, increment pointer
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DBRA D0, lLoop ; continue until done
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RTS
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IF DataAccessDebug THEN
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DoDebugSymbols mymemclear ; label for MacsBug
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ENDIF
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ENDPROC ; end of mymemclear
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;===============================================================================
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;
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; void CallCompletion(DBAsyncParmBlkPtr pb); - Calls completion routine.
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;
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;===============================================================================
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CallCompletion PROC EXPORT
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MOVE.L 4(A7), A0 ; A0 = pb
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WITH DBAsyncParamBlockRec
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MOVE.L completionProc(A0), A1 ; A1 = completion routine
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ENDWITH ; DBAsyncParamBlockRec
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JSR (A1) ; call completion routine
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RTS
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IF DataAccessDebug THEN
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DoDebugSymbols CallCompletion ; label for MacsBug
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ENDIF
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ENDPROC ; end of CallCompletion
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END
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