From e51b49e22660432064600b2062915a9a02df442b Mon Sep 17 00:00:00 2001
From: "Christian A. Weber" <chris@gna.ch>
Date: Tue, 26 May 1992 18:00:52 +0000
Subject: =?UTF-8?q?xpk=20eingebaut=20(l=C3=A4uft=20noch=20nicht...)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Source/OpenIFF.S | 69 ++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 45 insertions(+), 24 deletions(-)

diff --git a/Source/OpenIFF.S b/Source/OpenIFF.S
index 16e4137..1fbb470 100644
--- a/Source/OpenIFF.S
+++ b/Source/OpenIFF.S
@@ -1,11 +1,11 @@
 **
-**	$Id: OpenIFF.S,v 21.2 92/05/17 03:27:14 chris Exp $
-**	$Revision: 21.2 $
+**	$Id: OpenIFF.S,v 21.3 92/05/17 04:40:45 chris Exp $
+**	$Revision: 21.3 $
 **
 **	$Filename: OpenIFF.S $
 **	$Author: chris $
 **	$Release: 19.1 $
-**	$Date: 92/05/17 03:27:14 $
+**	$Date: 92/05/17 04:40:45 $
 **
 **	iff.library/IFFL_OpenIFF
 **
@@ -43,6 +43,11 @@
 *	  file or not. If it is an IFF file, memory is allocated and the file
 *	  is read into memory.
 *
+*         New for V22:
+*         If xpkmaster.library is installed in your system, IFFL_OpenIFF()
+*         will be able to read and decompress compressed IFF files, if they
+*         use one of the xpk standard compression schemes.
+*
 *	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
@@ -133,20 +138,13 @@ OpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
 *	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 THIS FUNCTION IS OBSOLETE.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
-*	file or not. If it is an IFF file, memory is allocated and the file
-*	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
-*	IFFError() to get the error number.
+*	THIS FUNCTION IS OBSOLETE. USE IFFL_OpenIFF() INSTEAD.
 *
 *   INPUTS
 *	filename - Pointer to a null-terminated string
@@ -160,7 +158,7 @@ OpenIFFFunc:	movem.l	d2-d6/a2/a5-a6,-(SP)
 *	the reason of the failure.
 *
 *   SEE ALSO
-*	OpenIFF(), CloseIFF(), IFFError()
+*	IFFL_OpenIFF(), IFFL_CloseIFF(), IFFL_IFFError()
 *
 *   BUGS
 *	None known
@@ -179,20 +177,13 @@ OldNewOpenIFFFunc:
 *	OpenIFF -- allocate memory for an IFF-file and read it
 *
 *    SYNOPSIS
-*	>>> THIS FUNCTION IS OBSOLETE. USE IFFL_OpenIFF() INSTEAD <<<
-*
 *	ifffile = OpenIFF( filename )
 *	D0                 A0
 *
 *	IFFFILE OpenIFF( char * )
 *
 *    FUNCTION
-*	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 NewOpenIFF() instead of OpenIFF().
+*	THIS FUNCTION IS OBSOLETE. USE IFFL_OpenIFF() INSTEAD.
 *
 *   INPUTS
 *	filename - Pointer to a null-terminated string
@@ -206,7 +197,7 @@ OldNewOpenIFFFunc:
 *	None
 *
 *   SEE ALSO
-*	NewOpenIFF(), CloseIFF(), IFFError()
+*	IFFL_OpenIFF(), IFFL_CloseIFF(), IFFL_IFFError()
 *
 *****************************************************************************
 
@@ -239,10 +230,40 @@ ReadMode:	movea.l	a6,a5			; A5 :  IFFBase
 		moveq.l	#12,d3			; Len
 		JSRLIB	Read			; erste 3 Longwords lesen
 		cmpi.l	#'FORM',(SP)
-		beq.b	2$
+		beq.b	.IsIFF
+
+	*** Es ist kein IFF. Testen ob's ein xpk-gepacktes IFF ist.
+
+		lea	XpkName(PC),a1
+		movea.l	iffb_SysBase(a5),a6
+		JSRLIB	OldOpenLibrary
+		tst.l	d0			; xpk.library geöffnet ?
+		beq.b	.NotIFF			; nope --->
+
+		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
+		tst.l	d0
+		bne.b	.XpkNotIFF		; Error --->
+
+		cmpi.l	#'FORM',3*4+xf_Head(SP)
+		bne.b	.XpkNotIFF
+
+.XpkNotIFF:
+		moveq	#IFFL_ERROR_NOTIFF,d5
+		bra.b	.XpkError
+.XpkError:
+		lea	xf_SIZEOF+3*4(SP),SP
+
+.NotIFF:
 		moveq	#IFFL_ERROR_NOTIFF,d5
 		bra.b	.Error1			; --->
-2$:
+.IsIFF:
 	*** Testen ob Chip-Speicher erwünscht (bei 8SVX-Files)
 
 		move.l	d6,d1			; Default-Requirements
@@ -257,7 +278,7 @@ ReadMode:	movea.l	a6,a5			; A5 :  IFFBase
 		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!
+		subq.l	#4,d3		; FUCK!!! IFF-Typ ist ja schon gelesen!
 		move.l	d2,d0
 		movea.l	iffb_SysBase(a5),a6
 		JSRLIB	AllocMem		; requirements von D1
-- 
cgit v1.2.3