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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1985,1997-1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* This file is used by the code of a virtual user input device
* (vuid) state maintainence package (see ../sundev/vuid_event.h for a
* description of what vuid is) and is private to that implementation.
* It implements the interface defined by ../sunwindowdev/vuid_state.h.
*/
#ifndef _SYS_VUID_STORE_H
#define _SYS_VUID_STORE_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* The typical struct vuid_seg state list contains 2 segments:
*
* First, the VKEY_FIRST segment with four values in its list,
* LOC_*_ABSOLUTE and LOC_*_DELTA. The rest of the values are
* booleans. The vuid storage package know to update the
* LOC_*_ABSOLUTE value when its gets a LOC_*_DELTA and visa
* versa.
* The ascii/meta segment has all booleans.
*
* The implementation is skewed to optimize the space usage but
* still be efficient in terms of accessing short vuid_value lists
* (e.g., during high volume mouse tracking) and gang requests
* about the state of shift buttons.
*/
/*
* A component of virutal user input device (vuid) state storage.
* A struct vuid_value holds a single non-boolean value.
*/
typedef struct vuid_value {
struct vuid_value *next; /* Next node in list */
ushort_t offset; /* Offset of value from seg addr */
int value; /* Value */
} Vuid_value;
#define VUID_VALUE_NULL ((Vuid_value *)0)
#define BITSPERBYTE 8
#define VUID_BIT_ARRAY_SIZE (VUID_SEG_SIZE/((sizeof (char))*BITSPERBYTE))
/*
* A component of virutal user input device (vuid) state storage.
* A struct vuid_seg contains all the values for a vuid segment.
* Neither the vuid_seg list or the vuid_value list will be sorted
* unless a performance problem is identified. As a new event is
* sent to vuid_set_value, so the lists grow.
*/
typedef struct vuid_seg {
struct vuid_seg *next; /* Next state segment in list */
ushort_t addr; /* Starting address of segment */
char booleans[VUID_BIT_ARRAY_SIZE];
/* Up/down value of boolean codes */
char ints[VUID_BIT_ARRAY_SIZE];
/* In/not in list */
struct vuid_value *list; /* Linked list of values of */
/* non-boolean codes. If a code is */
/* in this list, the boolean value is */
/* ignored and the corresponding bit */
/* in values is on. */
} Vuid_seg;
#define VUID_SEG_NULL ((Vuid_seg *)0)
#define vuid_cstate_to_state(cstate) ((Vuid_seg *)cstate)
#define vuid_set_boolean_bit(seg, offset) \
(seg)->booleans[(offset)/BITSPERBYTE] |= \
(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE)))
#define vuid_clear_boolean_bit(seg, offset) \
(seg)->booleans[(offset)/BITSPERBYTE] &= \
(~(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE))))
#define vuid_get_boolean_bit(seg, offset) \
((seg)->booleans[(offset)/BITSPERBYTE] & \
(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE))))
#define vuid_set_int_bit(seg, offset) \
(seg)->ints[(offset)/BITSPERBYTE] |= \
(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE)))
#define vuid_clear_int_bit(seg, offset) \
(seg)->ints[(offset)/BITSPERBYTE] &= \
(~(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE))))
#define vuid_get_int_bit(seg, offset) \
((seg)->ints[(offset)/BITSPERBYTE] & \
(1<<((BITSPERBYTE-1)-((offset)%BITSPERBYTE))))
#ifdef __cplusplus
}
#endif
#endif /* _SYS_VUID_STORE_H */
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