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Annotation of 43BSD/ucb/tn3270/screen.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *     Copyright 1984, 1985 by the Regents of the University of
        !             3:  *     California and by Gregory Glenn Minshall.
        !             4:  *
        !             5:  *     Permission to use, copy, modify, and distribute these
        !             6:  *     programs and their documentation for any purpose and
        !             7:  *     without fee is hereby granted, provided that this
        !             8:  *     copyright and permission appear on all copies and
        !             9:  *     supporting documentation, the name of the Regents of
        !            10:  *     the University of California not be used in advertising
        !            11:  *     or publicity pertaining to distribution of the programs
        !            12:  *     without specific prior permission, and notice be given in
        !            13:  *     supporting documentation that copying and distribution is
        !            14:  *     by permission of the Regents of the University of California
        !            15:  *     and by Gregory Glenn Minshall.  Neither the Regents of the
        !            16:  *     University of California nor Gregory Glenn Minshall make
        !            17:  *     representations about the suitability of this software
        !            18:  *     for any purpose.  It is provided "as is" without
        !            19:  *     express or implied warranty.
        !            20:  */
        !            21: 
        !            22: 
        !            23: /* defines and defines to describe how to deal with the screen */
        !            24: 
        !            25: #define LINESIZE       80
        !            26: #define NUMBERLINES    24
        !            27: #define SCREENSIZE     (LINESIZE*NUMBERLINES)
        !            28: #define LowestScreen() 0
        !            29: #define HighestScreen()        (SCREENSIZE-1)
        !            30: 
        !            31: #define ScreenLineOffset(x)    ((x)%LINESIZE)
        !            32: #define ScreenLine(x)  ((int)((x)/LINESIZE))
        !            33: #define ScreenInc(x)   (((x)==HighestScreen())? LowestScreen():x+1)
        !            34: #define ScreenDec(x)   (((x)==LowestScreen())? HighestScreen():x-1)
        !            35: #define ScreenUp(x)    (((x)+(SCREENSIZE-LINESIZE))%SCREENSIZE)
        !            36: #define ScreenDown(x)  (((x)+LINESIZE)%SCREENSIZE)
        !            37: #define IsOrder(x)     ((x) && ((x) < 0x40) && (\
        !            38:                            ((x) == ORDER_SF) || \
        !            39:                            ((x) == ORDER_SBA) || \
        !            40:                            ((x) == ORDER_IC) || \
        !            41:                            ((x) == ORDER_PT) || \
        !            42:                            ((x) == ORDER_RA) || \
        !            43:                            ((x) == ORDER_EUA) || \
        !            44:                            ((x) == ORDER_YALE)))
        !            45: #define BAIC(x)                ((x)&0x3f)
        !            46: #define CIAB(x)                (CIABuffer[(x)&0x3f])
        !            47: #define BufferTo3270_0(x)      (CIABuffer[(int)((x)/0x40)])
        !            48: #define BufferTo3270_1(x)      (CIABuffer[(x)&0x3f])
        !            49: #define Addr3270(x,y)  (BAIC(x)*64+BAIC(y))
        !            50: #define SetBufferAddress(x,y)  ((x)*LINESIZE+(y))
        !            51: 
        !            52: /* These know how fields are implemented... */
        !            53: 
        !            54: #define        FieldInc(p)     FieldFind(FieldForward, p, LowestScreen())
        !            55: #define        FieldDec(p)     (HighestScreen() - \
        !            56:                                FieldFind(FieldReverse, \
        !            57:                                        HighestScreen()-p, HighestScreen()))
        !            58: #define WhereAttrByte(p)       (IsStartField(p)? p: FieldDec(p))
        !            59: #define        WhereHighByte(p)        ScreenDec(FieldInc(p))
        !            60: #define WhereLowByte(p)                ScreenInc(WhereAttrByte(p))
        !            61: #define FieldAttributes(x)     (IsStartField(x)? Host[x].field&0xff : \
        !            62:                                    Host[WhereAttrByte(x)].field&0xff)
        !            63: #define TermAttributes(x)      (TermIsStartField(x)? Terminal[x].field&0xff : \
        !            64:                                    Terminal[WhereTermAttrByte(x)].field&0xff)
        !            65: #define TurnOffMdt(x)  (Host[WhereAttrByte(x)].field &= ~ATTR_MDT)
        !            66: #define TurnOnMdt(x)   (Host[WhereAttrByte(x)].field |= ATTR_MDT)
        !            67: #define HasMdt(x)      (Host[x].field&ATTR_MDT)        /* modified tag */
        !            68: 
        !            69: #define IsStartField(x)        (Host[x].field&ATTR_MASK)       /* field starts here */
        !            70: #define TermIsStartField(x)    (Terminal[x].field&ATTR_MASK)
        !            71: #define NewField(p,a)  (Host[p].field = (a)|ATTR_MASK, \
        !            72:                            FieldForward[p] = FieldReverse[SCREENSIZE-p-1] = 1)
        !            73: #define TermNewField(p,a)      (Terminal[p].field = (a)|ATTR_MASK)
        !            74: #define DeleteField(p) (Host[p].field = 0, \
        !            75:                            FieldForward[p] = FieldReverse[SCREENSIZE-p-1] = 0)
        !            76: #define TermDeleteField(p)     (Terminal[p].field = 0)
        !            77: #define        DeleteAllFields()       (bzero(FieldForward, sizeof FieldForward), \
        !            78:                                    bzero(FieldReverse, sizeof FieldReverse))
        !            79: 
        !            80: 
        !            81: /* The following are independent of the implementation of fields */
        !            82: #define IsProtectedAttr(p,a)   (IsStartField(p) || ((a)&ATTR_PROT))
        !            83: #define IsProtected(p) IsProtectedAttr(p,FieldAttributes(p))
        !            84: 
        !            85: #define IsUnProtected(x)       (!IsProtected(x))
        !            86: 
        !            87: #define IsAutoSkip(x)  (FieldAttributes(x)&ATTR_AUTO_SKIP)
        !            88: 
        !            89: #define IsNonDisplayAttr(c)    (((c)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY)
        !            90: #define        IsNonDisplay(p) IsNonDisplayAttr(FieldAttributes(p))
        !            91: 
        !            92: #define IsHighlightedAttr(c) \
        !            93:                (((c)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH)
        !            94: #define        IsHighlighted(p) \
        !            95:                (IsHighlightedAttr(FieldAttributes(p)) && !IsStartField(p))
        !            96: 
        !            97: #define TermIsNonDisplay(x)    \
        !            98:                    ((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY)
        !            99: #define TermIsHighlighted(x) \
        !           100:                (((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH) \
        !           101:                                    && !TermIsStartField(x))
        !           102: 
        !           103: #define TerminalCharacterAttr(c,p,a)   (IsNonDisplayAttr(a) ? ' ':c)
        !           104: #define TerminalCharacter(c,p) TerminalCharacterAttr(c,p,FieldAttributes(p))
        !           105: 
        !           106: #define NeedToRedisplayFields(p) ((TermIsNonDisplay(p) != IsNonDisplay(p)) || \
        !           107:                                (TermIsHighlighted(p) != IsHighlighted(p)))
        !           108: #define NeedToRedisplayFieldsAttr(p,c) ( \
        !           109:                        (TermIsNonDisplay(p) != IsNonDisplayAttr(c)) || \
        !           110:                        (TermIsHighlighted(p) != IsHighlightedAttr(c)))
        !           111: 
        !           112: #define NotVisuallyCompatibleAttributes(p,c,d) ( \
        !           113:                        (IsNonDisplayAttr(c) != IsNonDisplayAttr(d)) || \
        !           114:                        (IsHighlightedAttr(c) != IsHighlightedAttr(d)))
        !           115: 
        !           116: #define NeedToRedisplayAttr(c,p,a) \
        !           117:                        ((c != GetTerminal(p)) || NeedToRedisplayFieldsAttr(p,a))
        !           118: #define NeedToRedisplay(c,p)   NeedToRedisplayAttr(c,p,FieldAttributes(p))
        !           119: 
        !           120: #define MAX(x,y)       ((x)<(y)? (y):(x))
        !           121: #define MIN(x,y)       ((x)<(y)? x:(y))
        !           122: 
        !           123: #define GetHost(i)     Host[i].data
        !           124: #define SetHost(i,c)   (Host[i].data = c)
        !           125: 
        !           126: #define GetTerminal(i)         Terminal[i].data
        !           127: #define SetTerminal(i,c)       (Terminal[i].data = c)
        !           128: 
        !           129: struct {
        !           130:     char       data,   /* data at this position */
        !           131:                field;  /* field attributes of this location if ATTR_MASK */
        !           132: }      Host[SCREENSIZE],               /* host view of screen */
        !           133:        Terminal[SCREENSIZE];
        !           134: 
        !           135: char   FieldForward[SCREENSIZE],       /* non-zero for SF, 0..1919 */
        !           136:        FieldReverse[SCREENSIZE];       /* non-zero for SF, 1919..0 */
        !           137: 
        !           138: 
        !           139: int CursorAddress;                     /* where cursor is */
        !           140: int BufferAddress;                     /* where writes are going */
        !           141: 
        !           142: int Lowest, Highest;
        !           143: 
        !           144: /* the Following are globals */
        !           145: 
        !           146: extern char CIABuffer[];
        !           147: 
        !           148: int UnLocked;          /* is the keyboard unlocked */
        !           149: int AidByte;
        !           150: 
        !           151: int Initialized;       /* are we initialized? */

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