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1.1 root 1: /* Copyright (c) 1981 Regents of the University of California */
2: /* sccs id: @(#)ex_tty.h 7.3 9/9/81 */
3: /*
4: * Capabilities from termcap
5: *
6: * The description of terminals is a difficult business, and we only
7: * attempt to summarize the capabilities here; for a full description
8: * see the paper describing termcap.
9: *
10: * Capabilities from termcap are of three kinds - string valued options,
11: * numeric valued options, and boolean options. The string valued options
12: * are the most complicated, since they may include padding information,
13: * which we describe now.
14: *
15: * Intelligent terminals often require padding on intelligent operations
16: * at high (and sometimes even low) speed. This is specified by
17: * a number before the string in the capability, and has meaning for the
18: * capabilities which have a P at the front of their comment.
19: * This normally is a number of milliseconds to pad the operation.
20: * In the current system which has no true programmible delays, we
21: * do this by sending a sequence of pad characters (normally nulls, but
22: * specifiable as "pc"). In some cases, the pad is better computed
23: * as some number of milliseconds times the number of affected lines
24: * (to bottom of screen usually, except when terminals have insert modes
25: * which will shift several lines.) This is specified as '12*' e.g.
26: * before the capability to say 12 milliseconds per affected whatever
27: * (currently always line). Capabilities where this makes sense say P*.
28: */
29: var char tspace[256]; /* Space for capability strings */
30: var char *aoftspace; /* Address of tspace for relocation */
31:
32: var char *AL; /* P* Add new blank line */
33: var char *AL_PARM; /* P* Add n new blank lines */
34: extern char *BC; /* Back cursor */
35: var char *BT; /* P Back tab */
36: var char *CD; /* P* Clear to end of display */
37: var char *CE; /* P Clear to end of line */
38: var char *CL; /* P* Clear screen */
39: var char *CM; /* PG Cursor motion */
40: var char *CS; /* PG Change scrolling region (vt100) */
41: var char *xCR; /* P Carriage return */
42: var char *DC; /* P* Delete character */
43: var char *DL; /* P* Delete line sequence */
44: var char *DL_PARM; /* P* Delete n lines */
45: var char *DM; /* Delete mode (enter) */
46: var char *DO; /* Down line sequence */
47: var char *DOWN_PARM; /* Down n lines */
48: var char *ED; /* End delete mode */
49: var char *EI; /* End insert mode */
50: var char *F0,*F1,*F2,*F3,*F4,*F5,*F6,*F7,*F8,*F9;
51: /* Strings sent by various function keys */
52: var char *HO; /* Home cursor */
53: var char *IC; /* P Insert character */
54: var char *IM; /* Insert mode (give as ':im=:' if 'ic' */
55: var char *IP; /* P* Insert pad after char ins'd using IM+IE */
56: var char *KD; /* Keypad down arrow */
57: var char *KE; /* Keypad don't xmit */
58: var char *KH; /* Keypad home key */
59: var char *KL; /* Keypad left arrow */
60: var char *KR; /* Keypad right arrow */
61: var char *KS; /* Keypad start xmitting */
62: var char *KU; /* Keypad up arrow */
63: var char *LEFT_PARM; /* Left n chars */
64: var char *LL; /* Quick to last line, column 0 */
65: var char *ND; /* Non-destructive space */
66: var char *RIGHT_PARM; /* Right n spaces */
67: var char *xNL; /* Line feed (new line) */
68: extern char PC; /* Pad character */
69: var char *RC; /* Restore cursor from last SC */
70: var char *SC; /* Save cursor */
71: var char *SE; /* Standout end (may leave space) */
72: var char *SF; /* P Scroll forwards */
73: var char *SO; /* Stand out begin (may leave space) */
74: var char *SR; /* P Scroll backwards */
75: var char *TA; /* P Tab (other than ^I or with padding) */
76: var char *TE; /* Terminal end sequence */
77: var char *TI; /* Terminal initial sequence */
78: extern char *UP; /* Upline */
79: var char *UP_PARM; /* Up n lines */
80: var char *VB; /* Visible bell */
81: var char *VE; /* Visual end sequence */
82: var char *VS; /* Visual start sequence */
83: var bool AM; /* Automatic margins */
84: var bool BS; /* Backspace works */
85: var bool CA; /* Cursor addressible */
86: var bool DA; /* Display may be retained above */
87: var bool DB; /* Display may be retained below */
88: var bool EO; /* Can erase overstrikes with ' ' */
89: var bool GT; /* Gtty indicates tabs */
90: var bool HC; /* Hard copy terminal */
91: var bool HZ; /* Hazeltine ~ braindamage */
92: var bool IN; /* Insert-null blessing */
93: var bool MI; /* can move in insert mode */
94: var bool NC; /* No Cr - \r snds \r\n then eats \n (dm2500) */
95: var bool NS; /* No scroll - linefeed at bottom won't scroll */
96: var bool OS; /* Overstrike works */
97: var bool UL; /* Underlining works even though !os */
98: var bool XB; /* Beehive (no escape key, simulate with f1) */
99: var bool XN; /* A newline gets eaten after wrap (concept) */
100: var bool XT; /* Tabs are destructive */
101: var bool XX; /* Tektronix 4025 insert line */
102: /* X? is reserved for severely nauseous glitches */
103: /* If there are enough of these we may need bit masks! */
104:
105: /*
106: * From the tty modes...
107: */
108: var bool NONL; /* Terminal can't hack linefeeds doing a CR */
109: var bool UPPERCASE; /* Ick! */
110: extern short LINES; /* Number of lines on screen */
111: extern short COLUMNS;
112: var short OCOLUMNS; /* Save COLUMNS for a hack in open mode */
113:
114: var short outcol; /* Where the cursor is */
115: var short outline;
116:
117: var short destcol; /* Where the cursor should be */
118: var short destline;
119:
120: /*
121: * There are several kinds of tty drivers to contend with. These include:
122: * (1) V6: no CBREAK, no ioctl. (Include PWB V1 here).
123: * (2) V7 research: has CBREAK, has ioctl, and has the tchars (TIOCSETC)
124: * business to change start, stop, etc. chars.
125: * (3) USG V2: Basically like V6 but RAW mode is like V7 RAW.
126: * (We treat it as V6.)
127: * (4) USG V3: equivalent to V7 but totally incompatible.
128: * (5) Berkeley: has ltchars in addition to all of V7.
129: *
130: * The following attempts to decide what we are on, and declare
131: * some variables in the appropriate format. The wierd looking one (ttymode)
132: * is the thing we pass to sTTY and family to turn "RAW" mode on or off
133: * when we go into or out of visual mode. In V7/V6 it's just the flags word
134: * to stty. In USG V3 it's the whole tty structure.
135: */
136: #ifdef USG3TTY /* USG V3 */
137: var struct termio tty; /* Use this one structure to change modes */
138: typedef struct termio ttymode; /* Mode to contain tty flags */
139:
140: #else /* All others */
141: var struct sgttyb tty; /* Always stty/gtty using this one structure */
142: typedef int ttymode; /* Mode to contain tty flags */
143: # ifdef TIOCSETC /* V7 */
144: var struct tchars ottyc, nttyc; /* For V7 character masking */
145: # endif
146: # ifdef TIOCLGET /* Berkeley */
147: var struct ltchars olttyc, nlttyc; /* More of tchars style stuff */
148: # endif
149:
150: #endif
151:
152: var ttymode normf; /* Restore tty flags to this (someday) */
153: var bool normtty; /* Have to restore normal mode from normf */
154:
155: ttymode ostart(), setty(), unixex();
156:
157: var short costCM; /* # chars to output a typical CM, with padding etc. */
158: var short costSR; /* likewise for scroll reverse */
159: var short costAL; /* likewise for insert line */
160: var short costDP; /* likewise for DOWN_PARM */
161: var short costLP; /* likewise for LEFT_PARM */
162: var short costRP; /* likewise for RIGHT_PARM */
163:
164: #ifdef VMUNIX
165: # define MAXNOMACS 128 /* max number of macros of each kind */
166: # define MAXCHARMACS 2048 /* max # of chars total in macros */
167: #else
168: # define MAXNOMACS 32 /* max number of macros of each kind */
169: # define MAXCHARMACS 512 /* max # of chars total in macros */
170: #endif
171: struct maps {
172: char *cap; /* pressing button that sends this.. */
173: char *mapto; /* .. maps to this string */
174: char *descr; /* legible description of key */
175: };
176: var struct maps arrows[MAXNOMACS]; /* macro defs - 1st 5 built in */
177: var struct maps immacs[MAXNOMACS]; /* for while in insert mode */
178: var struct maps abbrevs[MAXNOMACS]; /* for word abbreviations */
179: var int ldisc; /* line discipline for ucb tty driver */
180: var char mapspace[MAXCHARMACS];
181: var char *msnext; /* next free location in mapspace */
182: var int maphopcnt; /* check for infinite mapping loops */
183: var bool anyabbrs; /* true if abbr or unabbr has been done */
184: var char ttynbuf[20]; /* result of ttyname() */
185: var int ttymesg; /* original mode of users tty */
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