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/*
* $XConsortium: hftQueue.h,v 1.2 91/07/16 13:02:35 jap Exp $
*
* Copyright IBM Corporation 1987,1988,1989,1990,1991
*
* All Rights Reserved
*
* License to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of IBM not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS, AND
* NONINFRINGEMENT OF THIRD PARTY RIGHTS, IN NO EVENT SHALL
* IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
*/
#ifndef HFTQUEUE_H
#define HFTQUEUE_H
/*
* Dispatches events from the hft queue to handlers appropriate
* to the various devices.
*
* int
* hftInitQueue()
* Initializes the hft queue.
* returns TRUE for success, FALSE on failure (queue
* already initialized or can't open HFT).
*
* hftTermQueue()
* Terminates the hft queue.
*
* hftInterruptAlways()
* causes the queue to interrupt every time an event
* arrives present.
*
* hftInterruptOnFirst()
* causes the queue to interrupt only when an event
* is added to an empty queue.
*
* hftEvHandler
* hftInstallHandler(evType,pHandler)
* int evType;
* hftEvHandler pHandler;
* Installs handler for events of type 'evType.'
* evType should be one of HFT_LOCATOR, HFT_TABLET,
* HFT_KEYBOARD,HFT_LPFK,HFT_DIAL,HFT_ADAPT, HFT_GRANTED,
* HFT_RETRACTED, HFT_BEFORE_EVENTS, HFT_AFTER_EVENTS,
* HFT_EVENT_ARRIVED. Each handler receives an
* hftEvent. To remove a handler, specify HFT_IGNORE.
* hftInstallDevice returns the previous handler, or
* HFT_ERROR if an error occured (queue not initialized,
* bad argument).
*
* void
* hftAddTimeout(pHandler,length)
* Installs a timeout handler. pHandler will be called
* after 'length' iterations through hftDispatchEvents.
*
* void
* hftDispatchEvents()
* Dispatches events from hft queue until queue is
* exhausted or one of the translator functions
* returns FALSE. An event is dispatched to it's
* device specific handler if one is defined, or to the
* handler for HFT_ANY if it exists. If neither handler
* is defined, the event is ignored.
*
* int
* hftFD()
* File descriptor (if any) which may be selected
* to determine if input is available on the hft
* queue.
*/
#define HFT_KEYBOARD 0
#define HFT_LOCATOR 1
#define HFT_ADAPT 2
#define HFT_TABLET 3
#define HFT_LPFK 4
#define HFT_DIAL 5
#define HFT_GRANTED 6
#define HFT_RETRACTED 7
#define HFT_EVENT_ARRIVED 8
#define HFT_BEFORE_EVENTS 9
#define HFT_AFTER_EVENTS 10
#define HFT_NEVENTS 11
#define HFT_IGNORE ((hftEvHandler)0)
#define HFT_ERROR ((hftEvHandler)-1)
/* THIS STRUCTURE SHOULD MATCH "struct hfunxlate" IN "sys/hft.h" */
typedef struct _HFTKEYEV {
char kePos;
char keScan;
char keStatus[2];
#ifdef AIXV3
char keSeconds[3];
char keSixtyths;
#endif
} hftKeyEv;
/* MUST BE THE SAME AS /usr/include/sys/hft.h */
#ifdef AIXV3 /* HACK ALERT */
# define HFT_LBUTTON 0x80
# define HFT_RBUTTON 0x20
# define HFT_MBUTTON 0x40
#else
# define HFT_LBUTTON 0x80
# define HFT_RBUTTON 0x40
# define HFT_MBUTTON 0x20
#endif
#define HFT_BUTTONS (HFT_LBUTTON|HFT_RBUTTON)
#define HFT_BUTTON1 0x80
#define HFT_BUTTON2 0x40
#define HFT_BUTTON3 0x20
#define HFT_BUTTON4 0x10
#define HFT_TABLET_BUTTONS (HFT_BUTTON1|HFT_BUTTON2|HFT_BUTTON3|HFT_BUTTON4)
#define HF_SHORT(f) ((signed short)((f)[0]<<8|(f)[1]))
#define HF_SETSHORT(f,v) (((f)[1]=(v)&0xff),(f[0]=(v)>>8))
typedef struct _HFTLOCEV {
short leDeltaX;
short leDeltaY;
char leSeconds[3];
char leSixtieths;
char leButtons;
char leStype;
} hftLocEv;
typedef struct _HFTLPFKEV {
short lpfkeKeyNo;
short lpfkeReserved;
char lpfkeSeconds[3];
char lpfkeSixtieths;
char lpfkeButtons;
char lpfkeStype;
} hftLPFKEv;
typedef struct _HFTDIALEV {
short deDialNo;
short deDelta;
char deSeconds[3];
char deSixtieths;
char deButtons;
char deStype;
} hftDialEv;
typedef struct _HFTADPEV {
char aeQueue;
char aeData[20];
} hftAdaptEv;
typedef struct {
int hftEvType;
union {
hftKeyEv hftKey;
hftLocEv hftLoc;
hftAdaptEv hftAdapt;
hftDialEv hftDial;
hftLPFKEv hftLpfk;
} hftEv;
} hftEvent;
#ifdef AIXV3
typedef void (*hftEvHandler)();
#else
typedef int (*hftEvHandler)();
#endif
extern int hftQFD;
extern volatile unsigned hftPending;
extern volatile unsigned hftGrantPending;
extern volatile unsigned hftRetractPending;
extern void hftInterruptAlways();
extern void hftInterruptOnFirst();
extern int hftInitQueue();
extern void hftTermQueue();
extern void hftAddTimeout();
extern hftEvHandler hftInstallHandler();
extern void hftDispatchEvents();
extern int hftFD();
#endif /* HFTQUEUE_H */
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