1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2: /* hack.termcap.c - version 1.0.3 */
   3: 
   4: #include <stdio.h>
   5: #include "config.h" /* for ROWNO and COLNO */
   6: #include "def.flag.h"   /* for flags.nonull */
   7: extern char *tgetstr(), *tgoto(), *getenv();
   8: extern long *alloc();
   9: 
  10: #ifndef lint
  11: extern          /* it is defined in libtermlib (libtermcap) */
  12: #endif lint
  13:     short ospeed;       /* terminal baudrate; used by tputs */
  14: static char tbuf[512];
  15: static char *HO, *CL, *CE, *UP, *CM, *ND, *XD, *BC, *SO, *SE, *TI, *TE;
  16: static char *VS, *VE;
  17: static int SG;
  18: static char PC = '\0';
  19: char *CD;       /* tested in pri.c: docorner() */
  20: int CO, LI;     /* used in pri.c and whatis.c */
  21: 
  22: startup()
  23: {
  24:     register char *term;
  25:     register char *tptr;
  26:     char *tbufptr, *pc;
  27: 
  28:     tptr = (char *) alloc(1024);
  29: 
  30:     tbufptr = tbuf;
  31:     if(!(term = getenv("TERM")))
  32:         error("Can't get TERM.");
  33:     if(!strncmp(term, "5620", 4))
  34:         flags.nonull = 1;   /* this should be a termcap flag */
  35:     if(tgetent(tptr, term) < 1)
  36:         error("Unknown terminal type: %s.", term);
  37:     if(pc = tgetstr("pc", &tbufptr))
  38:         PC = *pc;
  39:     if(!(BC = tgetstr("bc", &tbufptr))) {
  40:         if(!tgetflag("bs"))
  41:             error("Terminal must backspace.");
  42:         BC = tbufptr;
  43:         tbufptr += 2;
  44:         *BC = '\b';
  45:     }
  46:     HO = tgetstr("ho", &tbufptr);
  47:     CO = tgetnum("co");
  48:     LI = tgetnum("li");
  49:     if(CO < COLNO || LI < ROWNO+2)
  50:         setclipped();
  51:     if(!(CL = tgetstr("cl", &tbufptr)))
  52:         error("Hack needs CL.");
  53:     ND = tgetstr("nd", &tbufptr);
  54:     if(tgetflag("os"))
  55:         error("Hack can't have OS.");
  56:     CE = tgetstr("ce", &tbufptr);
  57:     UP = tgetstr("up", &tbufptr);
  58:     /* It seems that xd is no longer supported, and we should use
  59: 	   a linefeed instead; unfortunately this requires resetting
  60: 	   CRMOD, and many output routines will have to be modified
  61: 	   slightly. Let's leave that till the next release. */
  62:     XD = tgetstr("xd", &tbufptr);
  63: /* not: 		XD = tgetstr("do", &tbufptr); */
  64:     if(!(CM = tgetstr("cm", &tbufptr))) {
  65:         if(!UP && !HO)
  66:             error("Hack needs CM or UP or HO.");
  67:         printf("Playing hack on terminals without cm is suspect...\n");
  68:         getret();
  69:     }
  70:     SO = tgetstr("so", &tbufptr);
  71:     SE = tgetstr("se", &tbufptr);
  72:     SG = tgetnum("sg"); /* -1: not fnd; else # of spaces left by so */
  73:     if(!SO || !SE || (SG > 0)) SO = SE = 0;
  74:     CD = tgetstr("cd", &tbufptr);
  75:     set_whole_screen();     /* uses LI and CD */
  76:     if(tbufptr-tbuf > sizeof(tbuf)) error("TERMCAP entry too big...\n");
  77:     free(tptr);
  78: }
  79: 
  80: start_screen()
  81: {
  82:     xputs(TI);
  83:     xputs(VS);
  84: }
  85: 
  86: end_screen()
  87: {
  88:     xputs(VE);
  89:     xputs(TE);
  90: }
  91: 
  92: /* Cursor movements */
  93: extern xchar curx, cury;
  94: 
  95: curs(x, y)
  96: register int x, y;  /* not xchar: perhaps xchar is unsigned and
  97: 			   curx-x would be unsigned as well */
  98: {
  99: 
 100:     if (y == cury && x == curx)
 101:         return;
 102:     if(!ND && (curx != x || x <= 3)) {  /* Extremely primitive */
 103:         cmov(x, y);         /* bunker!wtm */
 104:         return;
 105:     }
 106:     if(abs(cury-y) <= 3 && abs(curx-x) <= 3)
 107:         nocmov(x, y);
 108:     else if((x <= 3 && abs(cury-y)<= 3) || (!CM && x<abs(curx-x))) {
 109:         (void) putchar('\r');
 110:         curx = 1;
 111:         nocmov(x, y);
 112:     } else if(!CM) {
 113:         nocmov(x, y);
 114:     } else
 115:         cmov(x, y);
 116: }
 117: 
 118: nocmov(x, y)
 119: {
 120:     if (cury > y) {
 121:         if(UP) {
 122:             while (cury > y) {  /* Go up. */
 123:                 xputs(UP);
 124:                 cury--;
 125:             }
 126:         } else if(CM) {
 127:             cmov(x, y);
 128:         } else if(HO) {
 129:             home();
 130:             curs(x, y);
 131:         } /* else impossible("..."); */
 132:     } else if (cury < y) {
 133:         if(XD) {
 134:             while(cury < y) {
 135:                 xputs(XD);
 136:                 cury++;
 137:             }
 138:         } else if(CM) {
 139:             cmov(x, y);
 140:         } else {
 141:             while(cury < y) {
 142:                 xputc('\n');
 143:                 curx = 1;
 144:                 cury++;
 145:             }
 146:         }
 147:     }
 148:     if (curx < x) {     /* Go to the right. */
 149:         if(!ND) cmov(x, y); else    /* bah */
 150:             /* should instead print what is there already */
 151:         while (curx < x) {
 152:             xputs(ND);
 153:             curx++;
 154:         }
 155:     } else if (curx > x) {
 156:         while (curx > x) {  /* Go to the left. */
 157:             xputs(BC);
 158:             curx--;
 159:         }
 160:     }
 161: }
 162: 
 163: cmov(x, y)
 164: register x, y;
 165: {
 166:     xputs(tgoto(CM, x-1, y-1));
 167:     cury = y;
 168:     curx = x;
 169: }
 170: 
 171: xputc(c) char c; {
 172:     (void) fputc(c, stdout);
 173: }
 174: 
 175: xputs(s) char *s; {
 176:     tputs(s, 1, xputc);
 177: }
 178: 
 179: cl_end() {
 180:     if(CE)
 181:         xputs(CE);
 182:     else {  /* no-CE fix - free after Harold Rynes */
 183:         /* this looks terrible, especially on a slow terminal
 184: 		   but is better than nothing */
 185:         register cx = curx, cy = cury;
 186: 
 187:         while(curx < COLNO) {
 188:             xputc(' ');
 189:             curx++;
 190:         }
 191:         curs(cx, cy);
 192:     }
 193: }
 194: 
 195: clear_screen() {
 196:     xputs(CL);
 197:     curx = cury = 1;
 198: }
 199: 
 200: home()
 201: {
 202:     if(HO)
 203:         xputs(HO);
 204:     else if(CM)
 205:         xputs(tgoto(CM, 0, 0));
 206:     else
 207:         curs(1, 1); /* using UP ... */
 208:     curx = cury = 1;
 209: }
 210: 
 211: standoutbeg()
 212: {
 213:     if(SO) xputs(SO);
 214: }
 215: 
 216: standoutend()
 217: {
 218:     if(SE) xputs(SE);
 219: }
 220: 
 221: backsp()
 222: {
 223:     xputs(BC);
 224:     curx--;
 225: }
 226: 
 227: bell()
 228: {
 229:     (void) putchar('\007');     /* curx does not change */
 230:     (void) fflush(stdout);
 231: }
 232: 
 233: static short tmspc10[] = {      /* from termcap */
 234:     0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
 235: };
 236: 
 237: delay_output() {
 238:     /* delay 50 ms - could also use a 'nap'-system call */
 239:     /* BUG: if the padding character is visible, as it is on the 5620
 240: 	   then this looks terrible. */
 241:     if(!flags.nonull)
 242:         tputs("50", 1, xputc);
 243: 
 244:         /* cbosgd!cbcephus!pds for SYS V R2 */
 245:         /* is this terminfo, or what? */
 246:         /* tputs("$<50>", 1, xputc); */
 247: 
 248:     else if(ospeed > 0 || ospeed < SIZE(tmspc10)) if(CM) {
 249:         /* delay by sending cm(here) an appropriate number of times */
 250:         register int cmlen = strlen(tgoto(CM, curx-1, cury-1));
 251:         register int i = 500 + tmspc10[ospeed]/2;
 252: 
 253:         while(i > 0) {
 254:             cmov(curx, cury);
 255:             i -= cmlen*tmspc10[ospeed];
 256:         }
 257:     }
 258: }
 259: 
 260: cl_eos()            /* free after Robert Viduya */
 261: {               /* must only be called with curx = 1 */
 262: 
 263:     if(CD)
 264:         xputs(CD);
 265:     else {
 266:         register int cx = curx, cy = cury;
 267:         while(cury <= LI-2) {
 268:             cl_end();
 269:             xputc('\n');
 270:             curx = 1;
 271:             cury++;
 272:         }
 273:         cl_end();
 274:         curs(cx, cy);
 275:     }
 276: }

Defined functions

backsp defined in line 221; used 1 times
cl_end defined in line 179; used 11 times
cl_eos defined in line 260; used 3 times
cmov defined in line 163; used 6 times
delay_output defined in line 237; used 2 times
end_screen defined in line 86; used 1 times
nocmov defined in line 118; used 3 times
standoutbeg defined in line 211; never used
standoutend defined in line 216; never used
start_screen defined in line 80; used 1 times
startup defined in line 22; used 1 times
xputc defined in line 171; used 5 times
xputs defined in line 175; used 17 times

Defined variables

BC defined in line 15; used 5 times
CD defined in line 19; used 6 times
CE defined in line 15; used 3 times
CL defined in line 15; used 2 times
CM defined in line 15; used 10 times
CO defined in line 20; used 14 times
HO defined in line 15; used 5 times
LI defined in line 20; used 7 times
ND defined in line 15; used 4 times
PC defined in line 18; used 1 times
  • in line 38
SE defined in line 15; used 5 times
SG defined in line 17; used 2 times
SO defined in line 15; used 5 times
TE defined in line 15; used 1 times
  • in line 89
TI defined in line 15; used 1 times
  • in line 82
UP defined in line 15; used 4 times
VE defined in line 16; used 1 times
  • in line 88
VS defined in line 16; used 1 times
  • in line 83
XD defined in line 15; used 3 times
tbuf defined in line 14; used 3 times
tmspc10 defined in line 233; used 3 times
Last modified: 1985-10-14
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