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**
** $Id: $
** $Revision: $
**
** $Filename: WriteChunkBytes.S $
** $Author: Christian A. Weber $
** $Release: 21.1 $
** $Date: 92/05/14 22:26:34 $
**
** iff.library/IFFL_WriteChunkBytes
**
** COPYRIGHT (C) 1987-1992 BY CHRISTIAN A. WEBER, BRUGGERWEG 2,
** CH-8037 ZUERICH, SWITZERLAND. ALL RIGHTS RESERVED. NO PART
** OF THIS SOFTWARE MAY BE COPIED, REPRODUCED, OR TRANSMITTED
** IN ANY FORM OR BY ANY MEANS, WITHOUT THE PRIOR WRITTEN PER-
** MISSION OF THE AUTHOR. USE AT YOUR OWN RISK.
**
IDNT IFFL_WriteChunkBytes
SECTION text,CODE
INCLUDE "IffLib.i"
XREF SetError,ClearError
XDEF WriteChunkBytesFunc
******* iff.library/IFFL_WriteChunkBytes ************************************
*
* NAME
* IFFL_WriteChunkBytes -- Write data into the current chunk
*
* SYNOPSIS
* success = IFFL_WriteChunkBytes( iff, buf, size )
* D0 A0 A1 D0
*
* LONG IFFL_WriteChunkBytes( IFFL_HANDLE, APTR, LONG )
*
* FUNCTION
* Writes "size" bytes from the specified buffer into the current chunk.
*
* INPUTS
* iff - IFF file handle, from IFFL_OpenIFF().
* buf - pointer to buffer area with bytes to be written.
* size - number of bytes to write.
*
* RESULT
* number of bytes written if successful or NULL if an error
* occurred. Call IFFL_IFFError() to know what's going on.
*
* SEE ALSO
* IFFL_PushChunk(), IFFL_PopChunk(), IFFL_IFFError()
*
*****************************************************************************
WriteChunkBytesFunc:
movem.l d2-d3/a2/a5-a6,-(SP)
movea.l a6,a5 ; IFFBase für ClearError()
movea.l a0,a2 ; A2 : IFF-Handle
movea.l iffb_DOSBase(a5),a6 ; A6 : DOSBase
*** Daten in Chunk schreiben (Seek-Position ist schon richtig)
move.l ifffh_File(a2),d1
move.l a1,d2 ; Adresse
move.l d0,d3 ; Länge
JSRLIB Write
cmp.l d3,d0
bne.b .WriteError
*** Chunk-Grösse updaten
add.l d3,ifffh_ChunkSize(a2)
*** Okay
bsr ClearError ; Setzt auch D0 auf TRUE
bra.b .End
*** Schreibfehler oder Seekfehler
.SeekError:
.WriteError: moveq.l #IFFL_ERROR_WRITE,d0
bsr SetError ; Setzt auch D0 auf FALSE
*** Routine beenden
.End: movem.l (SP)+,d2-d3/a2/a5-a6
rts
END
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