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1.1 root 1: /*
2: * Copyright (c) 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted
6: * provided that the above copyright notice and this paragraph are
7: * duplicated in all such forms and that any documentation,
8: * advertising materials, and other materials related to such
9: * distribution and use acknowledge that the software was developed
10: * by the University of California, Berkeley. The name of the
11: * University may not be used to endorse or promote products derived
12: * from this software without specific prior written permission.
13: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15: * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16: *
17: * @(#)screen.h 4.2 (Berkeley) 2/6/89
18: */
19:
20: #define INCLUDED_SCREEN
21:
22: /* defines and defines to describe how to deal with the screen */
23:
24: #if !defined(MSDOS)
25: #define MAXNUMBERLINES 43 /* 3278-4 */
26: #define MAXNUMBERCOLUMNS 132 /* 3278-5 */
27: #define MAXSCREENSIZE 3564 /* (27*132) 3278-5 */
28: #else /* !defined(MSDOS) */ /* MSDOS has memory constraints */
29: #define MAXNUMBERLINES 25 /* XXX */
30: #define MAXNUMBERCOLUMNS 80
31: #define MAXSCREENSIZE (MAXNUMBERLINES*MAXNUMBERCOLUMNS)
32: #endif /* !defined(MSDOS) */ /* MSDOS has memory constraints */
33: #define LowestScreen() 0
34: #define HighestScreen() (ScreenSize-1)
35:
36: #define ScreenLineOffset(x) ((x)%NumberColumns)
37: #define ScreenLine(x) ((int)((x)/NumberColumns))
38: #define ScreenInc(x) (((x)==HighestScreen())? LowestScreen():x+1)
39: #define ScreenDec(x) (((x)==LowestScreen())? HighestScreen():x-1)
40: #define ScreenUp(x) (((x)+(ScreenSize-NumberColumns))%ScreenSize)
41: #define ScreenDown(x) (((x)+NumberColumns)%ScreenSize)
42: #define IsOrder(x) (Orders[x])
43: #define BAIC(x) ((x)&0x3f)
44: #define CIAB(x) (CIABuffer[(x)&0x3f])
45: #define BufferTo3270_0(x) (CIABuffer[(int)((x)/0x40)])
46: #define BufferTo3270_1(x) (CIABuffer[(x)&0x3f])
47: #define Addr3270(x,y) (BAIC(x)*64+BAIC(y))
48: #define SetBufferAddress(x,y) ((x)*NumberColumns+(y))
49:
50: /* These know how fields are implemented... */
51:
52: #define WhereAttrByte(p) (IsStartField(p)? p: FieldDec(p))
53: #define WhereHighByte(p) ScreenDec(FieldInc(p))
54: #define WhereLowByte(p) ScreenInc(WhereAttrByte(p))
55: #define FieldAttributes(x) (IsStartField(x)? GetHost(x) : \
56: GetHost(WhereAttrByte(x)))
57: #define FieldAttributesPointer(p) (IsStartFieldPointer(p)? \
58: GetHostPointer(p): \
59: GetHost(WhereAttrByte((p)-&Host[0])))
60:
61: /*
62: * The MDT functions need to protect against the case where the screen
63: * is unformatted (sigh).
64: */
65:
66: /* Turn off the Modified Data Tag */
67: #define TurnOffMdt(x) \
68: if (HasMdt(WhereAttrByte(x))) { \
69: ModifyMdt(x, 0); \
70: }
71:
72: /* Turn on the Modified Data Tag */
73: #define TurnOnMdt(x) \
74: if (!HasMdt(WhereAttrByte(x))) { \
75: ModifyMdt(x, 1); \
76: }
77:
78: /* If this location has the MDT bit turned on (implies start of field) ... */
79: #define HasMdt(x) \
80: ((GetHost(x)&(ATTR_MDT|ATTR_MASK)) == (ATTR_MDT|ATTR_MASK))
81:
82: /*
83: * Is the screen formatted? Some algorithms change depending
84: * on whether there are any attribute bytes lying around.
85: */
86: #define FormattedScreen() \
87: ((WhereAttrByte(0) != 0) || ((GetHost(0)&ATTR_MASK) == ATTR_MASK))
88:
89: /* field starts here */
90: #define IsStartField(x) ((GetHost(x)&ATTR_MASK) == ATTR_MASK)
91: #define IsStartFieldPointer(p) ((GetHostPointer(p)&ATTR_MASK) == ATTR_MASK)
92:
93: #define NewField(p,a) SetHost(p, (a)|ATTR_MASK)
94: #define DeleteField(p) SetHost(p, 0)
95: #define DeleteAllFields()
96:
97: /* The following are independent of the implementation of fields */
98: #define IsProtectedAttr(p,a) (IsStartField(p) || ((a)&ATTR_PROT))
99: #define IsProtected(p) IsProtectedAttr(p,FieldAttributes(p))
100:
101: #define IsUnProtected(x) (!IsProtected(x))
102:
103: #define IsAutoSkip(x) (FieldAttributes(x)&ATTR_AUTO_SKIP)
104:
105: #define IsNonDisplayAttr(c) (((c)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY)
106: #define IsNonDisplay(p) IsNonDisplayAttr(FieldAttributes(p))
107:
108: #define IsHighlightedAttr(c) \
109: (((c)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH)
110: #define IsHighlighted(p) \
111: (IsHighlightedAttr(FieldAttributes(p)) && !IsStartField(p))
112:
113: typedef unsigned char ScreenImage;
114:
115: extern int
116: FieldFind();
117:
118: extern char
119: CIABuffer[];
120:
121: #define GetGeneric(i,h) (h)[i]
122: #define GetGenericPointer(p) (*(p))
123: #define SetGeneric(i,c,h) ((h)[i] = (c))
124: #define ModifyGeneric(i,what,h) {(h)[i] what;}
125:
126: #define GetHost(i) GetGeneric(i,Host)
127: #define GetHostPointer(p) GetGenericPointer(p)
128: #define SetHost(i,c) SetGeneric(i,c,Host)
129: #define ModifyHost(i,what) ModifyGeneric(i,what,Host)
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