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CU Amiga Super CD-ROM 18
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CU Amiga Magazine's Super CD-ROM 18 (1997)(EMAP Images)(GB)[!][issue 1998-01].iso
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CDsupport
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IDer
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Routines
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GetConfig.s
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1997-02-18
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76 lines
Move.W #CFGOPENERR,_ErrorCode
Lea _ConfigHandle(PC),A4
Move.L _Config(PC),A3
Cmp.L #0,A3
Beq.S .UseDefConfig
Move.L A3,_CfgErr+4
Move.L A3,_CfgErr+4+SIZEOFERR
Move.L A3,_CfgErr+4+(SIZEOFERR*2)
Bra.S .OpenConfig
.UseDefConfig Lea IDerPrefs(PC),A3
Move.L A3,D1
Addq #4,D1 ;try current directory
Move.L #MODE_OLDFILE,D2
CALL Open,DOS
Move.L D0,(A4)
Bne.S .ConfigFound
Move.L A3,D1 ;try ENV:
Move.L #MODE_OLDFILE,D2
CALL Open
Move.L D0,(A4)
Bne.S .ConfigFound
Addq #2,A3
Move.B #'S',(A3) ;try S:
.OpenConfig Move.L A3,D1
Move.L #MODE_OLDFILE,D2
CALL Open,DOS
Move.L D0,(A4)
Beq CloseDown
.ConfigFound Move.L D0,D1
Moveq #0,D2
Moveq #OFFSET_END,D3 ;end of the file
CALL Seek
Move.L (A4),D1
Moveq #0,D2
Moveq #OFFSET_BEGINNING,D3 ;start of the file
CALL Seek
Tst.L D0 ;file size (difference between end and start)
Beq CloseDown
Addq #1,D0 ;we need a blank byte at the end for saftey
Move.L D0,_ConfigSize
Move.W #CFGMEMERR,_ErrorCode
Move.L #MEMF_CLEAR,D1 ;the memory has to be clean for use to use it properly
CALL AllocMem,EXEC
Move.L D0,_ConfigMem
Beq CloseDown
Move.L (A4),D1
Move.L _ConfigMem(PC),D2
Move.L _ConfigSize(PC),D3
CALL Read,DOS
Move.W #CFGREADERR,_ErrorCode
Move.L _ConfigSize(PC),D1
Addq #1,D0 ;make up for the extra byte
Sub.L D0,D1
Bne CloseDown
Move.L (A4),D1
CALL Close
Clr.L (A4) ;the closedown routine would try to close it again if we don't clean up
Move.L _ConfigMem(PC),_ConfigCurPos ;setup the current position indicator of the config file, as we are going to go walking through it
Clr.W _ErrorCode