An neue Include-Files angepasst, Schreib-Modus implementiert.

1 files changed, 167 insertions, 51 deletions

diff --git a/Source/OpenIFF.S b/Source/OpenIFF.S
index 2b0d026..06ac715 100644
--- a/Source/OpenIFF.S
+++ b/Source/OpenIFF.S
@@ -1,13 +1,13 @@
 **
-**	$Id: $
-**	$Revision: $
+**	$Id: OpenIFF.S,v 1.1 92/05/12 22:26:43 chris Exp $
+**	$Revision: 1.1 $
 **
 **	$Filename: OpenIFF.S $
-**	$Author: Christian A. Weber $
+**	$Author: chris $
 **	$Release: 19.1 $
-**	$Date: 92/05/11 21:11:27 $
+**	$Date: 92/05/12 22:26:43 $
 **
-**	iff.library/IFFLib_OpenIFF
+**	iff.library/IFFL_OpenIFF
 **
 **	COPYRIGHT (C) 1987-1992 BY CHRISTIAN A. WEBER, BRUGGERWEG 2,
 **	CH-8037 ZUERICH, SWITZERLAND.  ALL RIGHTS RESERVED.  NO PART
@@ -17,25 +17,130 @@
 **
 
 
-		IDNT	IFFLib_OpenIFF
+		IDNT	IFFL_OpenIFF
 		SECTION	text,CODE
 
 		INCLUDE	"IFFLib.i"
 
 		XREF	SetError,ClearError
-		XDEF	OpenIFFFunc,NewOpenIFFFunc
+		XDEF	OpenIFFFunc,OldOpenIFFFunc,OldNewOpenIFFFunc
 
 
-******* iff.library/IFFLib_NewOpenIFF ***************************************
+******* iff.library/IFFL_OpenIFF ********************************************
 *
 *   NAME
-*	IFFLib_NewOpenIFF -- allocate memory for an IFF-file and read it
+*	IFFL_OpenIFF -- Open an IFF file for reading or writing
 *
 *   SYNOPSIS
-*	ifffile = IFFLib_NewOpenIFF( filename, memattr )
-*	D0                           A0        D0
+*	iff = IFFL_OpenIFF( filename, mode )
+*	D0                  A0        D0
 *
-*	IFFFILE IFFLib_OpenIFF( char * )
+*	IFFL_HANDLE IFFL_OpenIFF( char *, ULONG )
+*
+*   FUNCTION
+*	If mode == IFFL_MODE_READ:
+*	  This function opens a file on a disk and looks whether it's an IFF
+*	  file or not. If it is an IFF file, memory is allocated and the file
+*	  is read into memory.
+*	  If an error occurs, NULL is returned, and you can call
+*	  dos.library/IoErr() to get the IFFERR_... error number.
+*
+*	If mode == IFFL_MODE_WRITE:
+*	  Initializes an IFF file handle for writing. You may create chunks
+*	  with IFFL_PushChunk() and IFFL_PopChunk(), and you can write data
+*	  using the IFFL_WriteChunkBytes() routine.
+*
+*   INPUTS
+*	filename - Pointer to a null-terminated string
+*	mode     - IFFL_MODE_READ:  Open file for reading
+*	           IFFL_MODE_WRITE: Open file for writing
+*
+*   RESULT
+*	iff - IFF handle. Making assumptions about the internal structure
+*	      of this handle is unwise, and may break in the future.
+*	      If this function fails, NULL will be returned, and you may
+*	      call IFFL_IFFError() to know the reason of the failure.
+*
+*   SEE ALSO
+*	IFFL_CloseIFF(), IFFL_PushChunk(), IFFL_PopChunk(),
+*	IFFL_WriteChunkBytes(), IFFL_IFFError()
+*
+*   BUGS
+*	None known
+*
+*****************************************************************************
+
+OpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
+		moveq.l	#MEMF_ANY,d6		; MemType: egal
+
+		tst.l	d1			; IFFL_MODE_READ ?
+		beq	ReadMode
+
+*****************************************************************************
+* Schreib-Modus
+
+		movea.l	a6,a5			; A5 :  IFFBase
+		move.l	a0,d5			; D5 :  Filename
+
+	*** IFF-Handle allozieren
+
+		moveq.l	#ifffh_SIZEOF,d0
+		moveq.l	#1,d1
+		swap	d1			; MEMF_CLEAR
+		movea.l	iffb_SysBase(a5),a6
+		JSRLIB	AllocMem
+		tst.l	d0
+		bne.b	1$
+		moveq.l	#IFFL_ERROR_NOMEM,d0
+		bra.b	.Error			; Error --->
+1$:
+		movea.l	d0,a2			; A2 :  IFF-Handle
+
+		move.l	#IFFFH_MAGIC,ifffh_Magic(a2)
+
+	*** File zum Schreiben öffnen
+
+		move.l	d5,d1			; Name
+		move.l	#MODE_NEWFILE,d2
+		movea.l	iffb_DOSBase(a5),a6
+		JSRLIB	Open
+		move.l	d0,ifffh_File(a2)
+		bne.b	2$
+		moveq.l	#IFFL_ERROR_OPEN,d0
+.Error:		bsr	SetError
+		bra.b	.End			; ---> Fertig
+2$:
+	*** Header ('FORM\0\0\0\0') schreiben
+
+		move.l	d0,d1			; File
+		lea	IFFHeader(PC),a0
+		move.l	a0,d2
+		moveq.l	#8,d3
+		JSRLIB	Write
+		cmp.l	d3,d0
+		beq.b	3$
+		moveq.l	#IFFL_ERROR_WRITE,d0
+		bra.b	.Error
+3$:
+	*** Alles OK, IFF-Handle zurückgeben
+
+		bsr	ClearError
+		move.l	a2,d0			; IFF-Handle
+.End:		bra	OpenEnd			; ---> Fertig
+
+
+******* iff.library/NewOpenIFF **********************************************
+*
+*   NAME
+*	NewOpenIFF -- allocate memory for an IFF-file and read it
+*
+*   SYNOPSIS
+*	>>> THIS FUNCTION IS OBSOLETE. USE IFFL_OpenIFF() INSTEAD <<<
+*
+*	ifffile = NewOpenIFF( filename, memattr )
+*	D0                    A0        D0
+*
+*	IFFFILE OpenIFF( char * )
 *
 *   FUNCTION
 *	This function opens a file on a disk and looks whether it's an IFF
@@ -43,7 +148,7 @@
 *	is read into memory. The 'memattr' argument is taken to define the
 *	memory type. Normally memattr is set to MEMF_ANY or MEMF_PUBLIC.
 *	If an error occurs, NULL is returned, and you can call
-*	IFFLib_IFFError() to get the error number.
+*	IFFError() to get the error number.
 *
 *   INPUTS
 *	filename - Pointer to a null-terminated string
@@ -53,41 +158,43 @@
 *
 *   RESULT
 *	ifffile - 'FileHandle', points to the beginning of the IFF file
-*	("FORM...."), Zero if unsuccessful. Call IFFLib_IFFError() to get
+*	("FORM...."), Zero if unsuccessful. Call IFFError() to get
 *	the reason of the failure.
 *
 *   SEE ALSO
-*	IFFLib_OpenIFF(), IFFLib_CloseIFF(), IFFLib_IFFError()
+*	OpenIFF(), CloseIFF(), IFFError()
 *
 *   BUGS
 *	None known
 *
 *****************************************************************************
 
-OpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
-		moveq.l	#-1,d6			; Kein MemType angegeben
-		bra.s	DoCont
-
+OldNewOpenIFFFunc:
+		movem.l	d2-d6/a2/a5-a6,-(SP)
+		move.l	d0,d6			; D6 :  MemType
+		bra.b	ReadMode
 
 
-******* iff.library/IFFLib_OpenIFF ******************************************
+******* iff.library/OpenIFF *************************************************
 *
 *    NAME
-*	IFFLib_OpenIFF -- allocate memory for an IFF-file and read it
+*	OpenIFF -- allocate memory for an IFF-file and read it
 *
 *    SYNOPSIS
-*	ifffile = IFFLib_OpenIFF( filename )
-*	D0                        A0
+*	>>> THIS FUNCTION IS OBSOLETE. USE IFFL_OpenIFF() INSTEAD <<<
 *
-*	IFFFILE IFFLib_OpenIFF( char * )
+*	ifffile = OpenIFF( filename )
+*	D0                 A0
+*
+*	IFFFILE OpenIFF( char * )
 *
 *    FUNCTION
-*	This function does the same as the IFFLib_NewOpenIFF() routine
+*	This function does the same as the NewOpenIFF() routine
 *	above, except that you cannot specify the type of memory which is
 *	allocated for the file. Normally the type is 0 which means 'any
 *	memory', but if the IFF file type is '8SVX', the file is ALWAYS
 *	loaded into CHIP memory. If you wish to override these defaults,
-*	use IFFLib_NewOpenIFF() instead of IFFLib_OpenIFF().
+*	use NewOpenIFF() instead of OpenIFF().
 *
 *   INPUTS
 *	filename - Pointer to a null-terminated string
@@ -101,13 +208,18 @@ OpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
 *	None
 *
 *   SEE ALSO
-*	IFFLib_NewOpenIFF(), IFFLib_CloseIFF(), IFFLib_IFFError()
+*	NewOpenIFF(), CloseIFF(), IFFError()
 *
 *****************************************************************************
 
-NewOpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
-		move.l	d0,d6			; D6 :  MemType
-DoCont:		movea.l	a6,a5			; IFFBase
+OldOpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
+		moveq.l	#-1,d6			; Kein MemType angegeben
+;;		bra.b	ReadMode
+
+*****************************************************************************
+* Lese-Modus
+
+ReadMode:	movea.l	a6,a5			; A5 :  IFFBase
 		lea	-12(SP),SP		; Arbeitsspeicher reservieren
 		moveq.l	#0,d5			; Fehlernummer rücksetzen
 
@@ -115,12 +227,12 @@ DoCont:		movea.l	a6,a5			; IFFBase
 
 		move.l	a0,d1			; Name
 		move.l	#MODE_OLDFILE,d2	; accessmode
-		movea.l	ib_DOSBase(a5),a6
+		movea.l	iffb_DOSBase(a5),a6
 		JSRLIB	Open
 		move.l	d0,d4			; D4 := FileHandle
-		bne.s	1$
-		moveq	#IFF_CANTOPENFILE,d5
-		bra.s	.Error2			; --->
+		bne.b	1$
+		moveq	#IFFL_ERROR_OPEN,d5
+		bra.b	.Error2			; --->
 1$:
 	*** Erste 12 Bytes lesen, testen ob 'FORM'
 
@@ -129,17 +241,17 @@ DoCont:		movea.l	a6,a5			; IFFBase
 		moveq.l	#12,d3			; Len
 		JSRLIB	Read			; erste 3 Longwords lesen
 		cmpi.l	#'FORM',(SP)
-		beq.s	2$
-		moveq	#IFF_NOTIFF,d5
-		bra.s	.Error1			; --->
+		beq.b	2$
+		moveq	#IFFL_ERROR_NOTIFF,d5
+		bra.b	.Error1			; --->
 2$:
 	*** Testen ob Chip-Speicher erwünscht (bei 8SVX-Files)
 
 		move.l	d6,d1			; Default-Requirements
-		bpl.s	3$			; sind gültig --->
+		bpl.b	3$			; sind gültig --->
 		moveq.l	#MEMF_PUBLIC,d1
 		cmpi.l	#'8SVX',8(SP)		; 8SVX-File ?
-		bne.s	3$			; nein --->
+		bne.b	3$			; nein --->
 		moveq.l	#MEMF_CHIP|MEMF_PUBLIC,d1 ; sonst CHIP-Memory!
 3$:
 	*** Speicher für File reservieren
@@ -149,13 +261,13 @@ DoCont:		movea.l	a6,a5			; IFFBase
 		add.l	d3,d2			; D2 :  Gesamtlänge
 		subq.l	#4,d3	; FUCK!!! IFF-Typ ist ja schon gelesen!
 		move.l	d2,d0
-		movea.l	ib_SysBase(a5),a6
+		movea.l	iffb_SysBase(a5),a6
 		JSRLIB	AllocMem		; requirements von D1
 		movea.l	d0,a2			; A2 :  IFFFile-Adresse
 		tst.l	d0
-		bne.s	4$			; OK --->
-		moveq	#IFF_NOMEM,d5
-		bra.s	.Error1			; --->
+		bne.b	4$			; OK --->
+		moveq	#IFFL_ERROR_NOMEM,d5
+		bra.b	.Error1			; --->
 4$:
 	*** File einladen
 
@@ -164,30 +276,34 @@ DoCont:		movea.l	a6,a5			; IFFBase
 		move.l	a2,d2			; Adr
 		addq.l	#8,d2			; FORM.... schon gelesen!
 		addq.l	#4,d2			; IFF-Typ schon gelesen
-		movea.l	ib_DOSBase(a5),a6
+		movea.l	iffb_DOSBase(a5),a6
 		JSRLIB	Read			; D3 war schon Länge
 		tst.l	d0
-		bpl.s	5$			; OK --->
-		moveq	#IFF_READERROR,d5
-		bra.s	.Error1
+		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
-		movea.l	ib_DOSBase(a5),a6
+		movea.l	iffb_DOSBase(a5),a6
 		JSRLIB	Close
 
 .Error2:	move.l	d5,d0			; Error ?
-		beq.s	6$			; nein --->
+		beq.b	6$			; nein --->
 		bsr	SetError		; Löscht auch D0
-		bra.s	Ende
+		bra.b	Ende
 6$:
 		bsr	ClearError
 		move.l	a2,d0			; Adresse als Return-Code
 Ende:
 		lea	12(SP),SP		; Lokalen Speicher freigeben
-		movem.l	(SP)+,d2-d6/a2/a5-a6
+
+OpenEnd:	movem.l	(SP)+,d2-d6/a2/a5-a6
 		rts
 
+
+IFFHeader:	dc.b	"FORM",0,0,0,0
+
 		END