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-rw-r--r--Source/OpenIFF.S151
1 files changed, 109 insertions, 42 deletions
diff --git a/Source/OpenIFF.S b/Source/OpenIFF.S
index 1fbb470..a6256f6 100644
--- a/Source/OpenIFF.S
+++ b/Source/OpenIFF.S
@@ -1,11 +1,11 @@
**
-** $Id: OpenIFF.S,v 21.3 92/05/17 04:40:45 chris Exp $
-** $Revision: 21.3 $
+** $Id: OpenIFF.S,v 22.1 92/05/26 18:00:52 chris Exp $
+** $Revision: 22.1 $
**
** $Filename: OpenIFF.S $
** $Author: chris $
** $Release: 19.1 $
-** $Date: 92/05/17 04:40:45 $
+** $Date: 92/05/26 18:00:52 $
**
** iff.library/IFFL_OpenIFF
**
@@ -16,12 +16,20 @@
** MISSION OF THE AUTHOR. USE AT YOUR OWN RISK.
**
+DEBUG_DETAIL SET 0
+
+XPK
IDNT IFFL_OpenIFF
SECTION text,CODE
INCLUDE "IFFLib.i"
+ IFD XPK
+ INCLUDE "INCUSR:libraries/xpk.i"
+XPK_MARGIN EQU 256
+ ENDC
+
XREF SetError,ClearError
XDEF OpenIFFFunc,OldOpenIFFFunc,OldNewOpenIFFFunc
@@ -73,11 +81,11 @@
*
*****************************************************************************
-OpenIFFFunc: movem.l d2-d6/a2/a5-a6,-(SP)
+OpenIFFFunc: movem.l d2-d6/a2/a4-a6,-(SP)
moveq.l #MEMF_ANY,d6 ; MemType: egal
tst.l d0 ; IFFL_MODE_READ ?
- beq ReadMode
+ beq.b ReadMode
*****************************************************************************
* Schreib-Modus
@@ -166,7 +174,7 @@ OpenIFFFunc: movem.l d2-d6/a2/a5-a6,-(SP)
*****************************************************************************
OldNewOpenIFFFunc:
- movem.l d2-d6/a2/a5-a6,-(SP)
+ movem.l d2-d6/a2/a4-a6,-(SP)
move.l d0,d6 ; D6 : MemType
bra.b ReadMode
@@ -201,7 +209,7 @@ OldNewOpenIFFFunc:
*
*****************************************************************************
-OldOpenIFFFunc: movem.l d2-d6/a2/a5-a6,-(SP)
+OldOpenIFFFunc: movem.l d2-d6/a2/a4-a6,-(SP)
moveq.l #-1,d6 ; Kein MemType angegeben
;; bra.b ReadMode
@@ -211,6 +219,9 @@ OldOpenIFFFunc: movem.l d2-d6/a2/a5-a6,-(SP)
ReadMode: movea.l a6,a5 ; A5 : IFFBase
lea -12(SP),SP ; Arbeitsspeicher reservieren
moveq.l #0,d5 ; Fehlernummer rücksetzen
+ IFD XPK
+ suba.l a4,a4 ; XpkBase
+ ENDC
*** File öffnen
@@ -221,17 +232,30 @@ ReadMode: movea.l a6,a5 ; A5 : IFFBase
move.l d0,d4 ; D4 := FileHandle
bne.b 1$
moveq #IFFL_ERROR_OPEN,d5
- bra.b .Error2 ; --->
+ bra .Error2 ; --->
1$:
- *** Erste 12 Bytes lesen, testen ob 'FORM'
+ *** Erste 12 Bytes lesen und wieder an den Anfang seeken
move.l d4,d1 ; File
move.l SP,d2 ; Adr
moveq.l #12,d3 ; Len
JSRLIB Read ; erste 3 Longwords lesen
+ cmp.l d3,d0
+ bne .ReadError
+
+ move.l d4,d1 ; File
+ moveq #0,d2 ; Position
+ moveq #OFFSET_BEGINNING,d3
+ JSRLIB Seek ; Zurück an den Fileanfang
+
+ moveq.l #12,d3 ; Remember-Size + 'FORM....'
+
+ *** testen ob 'FORM' steht im ersten LONG
+
cmpi.l #'FORM',(SP)
beq.b .IsIFF
+ IFD XPK
*** Es ist kein IFF. Testen ob's ein xpk-gepacktes IFF ist.
lea XpkName(PC),a1
@@ -239,27 +263,38 @@ ReadMode: movea.l a6,a5 ; A5 : IFFBase
JSRLIB OldOpenLibrary
tst.l d0 ; xpk.library geöffnet ?
beq.b .NotIFF ; nope --->
+ movea.l d0,a4 ; A4 : XpkBase
+
+ PRINTF 10,<"Opened xpk.library">
- movea.l d0,a6 ; XpkBase
lea -xf_SIZEOF(SP),SP ; Platz für FIB
movea.l SP,a0 ; fib für XpkExamine()
clr.l -(SP) ; TAG_DONE
move.l d4,-(SP) ; Filehandle
pea XPK_InFH ; TagItem
movea.l SP,a1 ; Tags
- JSRLIB XpkExamine
+ movea.l a4,a6 ; XpkBase
+ jsr _LVOXpkExamine(a6)
+ movem.l xf_Head+3*4(SP),d1-d3 ; Die 3 ersten LONGs
+ lea xf_SIZEOF+3*4(SP),SP ; Stack aufräumen
+ movem.l d1-d3,(SP) ; Die 3 ersten LONGs
tst.l d0
- bne.b .XpkNotIFF ; Error --->
+ bne.b .NotIFF ; XPKExamine() Error --->
- cmpi.l #'FORM',3*4+xf_Head(SP)
- bne.b .XpkNotIFF
+ PRINTF 10,<"Examine successful">
-.XpkNotIFF:
- moveq #IFFL_ERROR_NOTIFF,d5
- bra.b .XpkError
-.XpkError:
- lea xf_SIZEOF+3*4(SP),SP
+ move.l d4,d1 ; File
+ moveq #0,d2 ; Position
+ moveq #OFFSET_BEGINNING,d3
+ movea.l iffb_DOSBase(a5),a6
+ JSRLIB Seek ; Zurück an den Fileanfang
+
+ moveq.l #(XPK_MARGIN+12)/4,d3 ; Remember-Size + 'FORM....'
+ lsl.l #2,d3 ; Spart 2 Bytes :)
+ cmpi.l #'FORM',(SP) ; Ist's jetzt ein IFF ?
+ beq.b .IsIFF ; yup!!
+ ENDC
.NotIFF:
moveq #IFFL_ERROR_NOTIFF,d5
bra.b .Error1 ; --->
@@ -275,11 +310,8 @@ ReadMode: movea.l a6,a5 ; A5 : IFFBase
3$:
*** Speicher für File reservieren
- moveq.l #12,d2 ; 'Remember' + FORM....
- move.l 4(SP),d3 ; D3 : FORM-Länge
- add.l d3,d2 ; D2 : Gesamtlänge
- subq.l #4,d3 ; FUCK!!! IFF-Typ ist ja schon gelesen!
- move.l d2,d0
+ add.l 4(SP),d3 ; D3 : Länge total
+ move.l d3,d0
movea.l iffb_SysBase(a5),a6
JSRLIB AllocMem ; requirements von D1
movea.l d0,a2 ; A2 : IFFFile-Adresse
@@ -287,42 +319,77 @@ ReadMode: movea.l a6,a5 ; A5 : IFFBase
bne.b 4$ ; OK --->
moveq #IFFL_ERROR_NOMEM,d5
bra.b .Error1 ; --->
-4$:
- *** File einladen
+4$: move.l d3,(a2)+ ; Länge eintragen (Remember)
+ subq.l #4,d3 ; Remember-Size wieder wegzählen
+
+ *** Je nachdem XPK-gepacktes File laden
+ IFD XPK
+ move.l a4,d0 ; XpkBase
+ beq.b .NoXpkRead ; Kein Xpk-File --->
+
+ clr.l -(SP) ; TAG_DONE
+
+ move.l d3,-(SP) ; Länge
+ pea XPK_OutBufLen
+
+ move.l a2,-(SP) ; OutBuf
+ pea XPK_OutBuf
+
+ move.l d4,-(SP) ; File
+ pea XPK_InFH
+
+ movea.l SP,a0 ; Tags
+ movea.l a4,a6 ; XpkBase
+ jsr _LVOXpkUnpack(a6)
+ lea 7*4(SP),SP
+ tst.l d0 ; OK ?
+ bra.b .ReadCont ; ---> dort weitermachen :)
+.NoXpkRead:
+ ENDC
+ *** Nicht-XPK-gepacktes IFF-File laden
- move.l d2,(a2)+ ; Länge des reserv. Bereichs
move.l d4,d1 ; File
move.l a2,d2 ; Adr
- addq.l #8,d2 ; FORM.... schon gelesen!
- addq.l #4,d2 ; IFF-Typ schon gelesen
movea.l iffb_DOSBase(a5),a6
JSRLIB Read ; D3 war schon Länge
- tst.l d0
- bpl.b 5$ ; OK --->
- moveq #IFFL_ERROR_READ,d5
- bra.b .Error1
-5$:
- movem.l (SP),d0-d2 ; FORM, Länge und Type
- movem.l d0-d2,(a2) ; IFF-Filetyp
-
-.Error1: move.l d4,d1 ; File
+ cmp.l d3,d0 ; Soviel gelesen ?
+.ReadCont: beq.b .ReadOK ; Yep ---> OK
+.ReadError: moveq #IFFL_ERROR_READ,d5
+.ReadOK:
+.Error1:
+ move.l d4,d1 ; File
movea.l iffb_DOSBase(a5),a6
JSRLIB Close
+.Error2:
-.Error2: move.l d5,d0 ; Error ?
+ *** Cleanup & quit
+
+ IFD XPK
+ move.l a4,d0 ; Xpk library offen ?
+ beq.b .XpkNotOpen ; noe --->
+ movea.l a4,a1 ; XpkBase
+ movea.l iffb_SysBase(a5),a6
+ JSRLIB CloseLibrary
+.XpkNotOpen:
+ ENDC
+ move.l d5,d0 ; Error ?
beq.b 6$ ; nein --->
bsr SetError ; Löscht auch D0
- bra.b Ende
+ bra.b .Ende
6$:
bsr ClearError
move.l a2,d0 ; Adresse als Return-Code
-Ende:
+.Ende:
lea 12(SP),SP ; Lokalen Speicher freigeben
-OpenEnd: movem.l (SP)+,d2-d6/a2/a5-a6
+OpenEnd: movem.l (SP)+,d2-d6/a2/a4-a6
rts
IFFHeader: dc.b "FORM",0,0,0,0
+ IFD XPK
+XpkName: dc.b "xpkmaster.library",0
+ ENDC
+
END
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 21:40:21 +0000