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/* * $OpenBSD: screen.h,v 1.3 2003/06/03 02:56:19 millert Exp $*/
/*-
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)screen.h 4.3 (Berkeley) 4/26/91
*/
#define INCLUDED_SCREEN
/* defines and defines to describe how to deal with the screen */
#if !defined(MSDOS)
#define MAXNUMBERLINES 43 /* 3278-4 */
#define MAXNUMBERCOLUMNS 132 /* 3278-5 */
#define MAXSCREENSIZE 3564 /* (27*132) 3278-5 */
#else /* !defined(MSDOS) */ /* MSDOS has memory constraints */
#define MAXNUMBERLINES 25 /* XXX */
#define MAXNUMBERCOLUMNS 80
#define MAXSCREENSIZE (MAXNUMBERLINES*MAXNUMBERCOLUMNS)
#endif /* !defined(MSDOS) */ /* MSDOS has memory constraints */
#define LowestScreen() 0
#define HighestScreen() (ScreenSize-1)
#define ScreenLineOffset(x) ((x)%NumberColumns)
#define ScreenLine(x) ((int)((x)/NumberColumns))
#define ScreenInc(x) (((x)==HighestScreen())? LowestScreen():x+1)
#define ScreenDec(x) (((x)==LowestScreen())? HighestScreen():x-1)
#define ScreenUp(x) (((x)+(ScreenSize-NumberColumns))%ScreenSize)
#define ScreenDown(x) (((x)+NumberColumns)%ScreenSize)
#define IsOrder(x) (Orders[x])
#define BAIC(x) ((x)&0x3f)
#define CIAB(x) (CIABuffer[(x)&0x3f])
#define BufferTo3270_0(x) (CIABuffer[(int)((x)/0x40)])
#define BufferTo3270_1(x) (CIABuffer[(x)&0x3f])
#define Addr3270(x,y) (BAIC(x)*64+BAIC(y))
#define SetBufferAddress(x,y) ((x)*NumberColumns+(y))
/* These know how fields are implemented... */
#define WhereAttrByte(p) (IsStartField(p)? p: FieldDec(p))
#define WhereHighByte(p) ScreenDec(FieldInc(p))
#define WhereLowByte(p) ScreenInc(WhereAttrByte(p))
#define FieldAttributes(x) (IsStartField(x)? GetHost(x) : \
GetHost(WhereAttrByte(x)))
#define FieldAttributesPointer(p) (IsStartFieldPointer(p)? \
GetHostPointer(p): \
GetHost(WhereAttrByte((p)-&Host[0])))
/*
* The MDT functions need to protect against the case where the screen
* is unformatted (sigh).
*/
/* Turn off the Modified Data Tag */
#define TurnOffMdt(x) \
if (HasMdt(WhereAttrByte(x))) { \
ModifyMdt(x, 0); \
}
/* Turn on the Modified Data Tag */
#define TurnOnMdt(x) \
if (!HasMdt(WhereAttrByte(x))) { \
ModifyMdt(x, 1); \
}
/* If this location has the MDT bit turned on (implies start of field) ... */
#define HasMdt(x) \
((GetHost(x)&(ATTR_MDT|ATTR_MASK)) == (ATTR_MDT|ATTR_MASK))
/*
* Is the screen formatted? Some algorithms change depending
* on whether there are any attribute bytes lying around.
*/
#define FormattedScreen() \
((WhereAttrByte(0) != 0) || ((GetHost(0)&ATTR_MASK) == ATTR_MASK))
/* field starts here */
#define IsStartField(x) ((GetHost(x)&ATTR_MASK) == ATTR_MASK)
#define IsStartFieldPointer(p) ((GetHostPointer(p)&ATTR_MASK) == ATTR_MASK)
#define NewField(p,a) SetHost(p, (a)|ATTR_MASK)
#define DeleteField(p) SetHost(p, 0)
#define DeleteAllFields()
/* The following are independent of the implementation of fields */
#define IsProtectedAttr(p,a) (IsStartField(p) || ((a)&ATTR_PROT))
#define IsProtected(p) IsProtectedAttr(p,FieldAttributes(p))
#define IsUnProtected(x) (!IsProtected(x))
#define IsAutoSkip(x) (FieldAttributes(x)&ATTR_AUTO_SKIP)
#define IsNonDisplayAttr(c) (((c)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY)
#define IsNonDisplay(p) IsNonDisplayAttr(FieldAttributes(p))
#define IsHighlightedAttr(c) \
(((c)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH)
#define IsHighlighted(p) \
(IsHighlightedAttr(FieldAttributes(p)) && !IsStartField(p))
typedef unsigned char ScreenImage;
extern int
FieldFind();
extern char
CIABuffer[];
#define GetGeneric(i,h) (h)[i]
#define GetGenericPointer(p) (*(p))
#define SetGeneric(i,c,h) ((h)[i] = (c))
#define ModifyGeneric(i,what,h) {(h)[i] what;}
#define GetHost(i) GetGeneric(i,Host)
#define GetHostPointer(p) GetGenericPointer(p)
#define SetHost(i,c) SetGeneric(i,c,Host)
#define ModifyHost(i,what) ModifyGeneric(i,what,Host)
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