1 /* Copyright (c) 1981 Regents of the University of California */ 2 /* sccs id: @(#)ex_tty.h 7.3 09/09/81 */ 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 */ 186