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GuruMeditation
Docs » Include » rexx » rexxio.h / .i
#ifndef REXX_REXXIO_H
#define REXX_REXXIO_H
/*
**	$VER: rexxio.h 1.4 (8.11.1991)
**	Includes Release 45.1
**
**	Header file for ARexx Input/Output related structures
**
**	(C) Copyright 1986,1987,1988,1989,1990 William S. Hawes
**	(C) Copyright 1990-2001 Amiga, Inc.
**		All Rights Reserved
*/

#ifndef REXX_STORAGE_H
#include <rexx/storage.h>
#endif

#define RXBUFFSZ  204		       /* buffer length		*/

/*
 * The IoBuff is a resource node used to maintain the File List.  Nodes
 * are allocated and linked into the list whenever a file is opened.
 */
struct IoBuff {
   struct RexxRsrc iobNode;	       /* structure for files/strings	*/
   APTR     iobRpt;		       /* read/write pointer		*/
   LONG     iobRct;		       /* character count		*/
   LONG     iobDFH;		       /* DOS filehandle		*/
   APTR     iobLock;		       /* DOS lock			*/
   LONG     iobBct;		       /* buffer length		*/
   BYTE     iobArea[RXBUFFSZ];	       /* buffer area			*/
   };				       /* size: 256 bytes		*/

/* Access mode definitions						*/
#define RXIO_EXIST   -1	       /* an external filehandle	*/
#define RXIO_STRF    0		       /* a "string file"		*/
#define RXIO_READ    1		       /* read-only access		*/
#define RXIO_WRITE   2		       /* write mode			*/
#define RXIO_APPEND  3		       /* append mode (existing file)	*/

/*
 * Offset anchors for SeekF()
 */
#define RXIO_BEGIN   -1L	       /* relative to start		*/
#define RXIO_CURR    0L	       /* relative to current position	*/
#define RXIO_END     1L	       /* relative to end		*/

/* The Library List contains just plain resource nodes.		*/

#define LLOFFSET(rrp) (rrp->rr_Arg1)   /* "Query" offset		*/
#define LLVERS(rrp)   (rrp->rr_Arg2)   /* library version		*/

/*
 * The RexxClipNode structure is used to maintain the Clip List.  The value
 * string is stored as an argstring in the rr_Arg1 field.
 */
#define CLVALUE(rrp) ((STRPTR) rrp->rr_Arg1)

/*
 * A message port structure, maintained as a resource node.  The ReplyList
 * holds packets that have been received but haven't been replied.
 */
struct RexxMsgPort {
   struct RexxRsrc rmp_Node;	       /* linkage node			*/
   struct MsgPort  rmp_Port;	       /* the message port		*/
   struct List	   rmp_ReplyList;      /* messages awaiting reply	*/
   };

/*
 * DOS Device types
 */
#define DT_DEV	  0L		       /* a device			*/
#define DT_DIR	  1L		       /* an ASSIGNed directory	*/
#define DT_VOL	  2L		       /* a volume			*/

/*
 * Private DOS packet types
 */
#define ACTION_STACK 2002L	       /* stack a line			*/
#define ACTION_QUEUE 2003L	       /* queue a line			*/

#endif

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