games/hack/hack.termcap.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.termcap.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.termcap.c,v 1.10 1999/11/16 10:26:38 marcel Exp $ */
   4 /* $DragonFly: src/games/hack/hack.termcap.c,v 1.5 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include <termcap.h>
   7 #include "hack.h"
   8
   9 static char tbuf[512];
  10 static char *HO, *CL, *CE, *tcUP, *CM, *ND, *XD, *tcBC, *SO, *SE, *TI, *TE;
  11 static char *VS, *VE;
  12 static int SG;
  13 static char tcPC = '\0';
  14 char *CD;               /* tested in pri.c: docorner() */
  15 int CO, LI;             /* used in pri.c and whatis.c */
  16
  17 static void     nocmov(int, int);
  18 static void     cmov(int, int);
  19 static int      xputc(int);
  20 static int      xputs(char *);
  21
  22 void
  23 startup(void)
  24 {
  25         char *term;
  26         char *tptr;
  27         char *tbufptr, *pc;
  28
  29         tptr = (char *) alloc(1024);
  30
  31         tbufptr = tbuf;
  32         if(!(term = getenv("TERM")))
  33                 error("Can't get TERM.");
  34         if(tgetent(tptr, term) < 1)
  35                 error("Unknown terminal type: %s.", term);
  36         if (tgetflag(__DECONST(char *, "NP")) ||
  37             tgetflag(__DECONST(char *, "nx")))
  38                 flags.nonull = 1;
  39         if((pc = tgetstr(__DECONST(char *, "pc"), &tbufptr)))
  40                 tcPC = *pc;
  41         if(!(tcBC = tgetstr(__DECONST(char *, "bc"), &tbufptr))
  42             &&!(tcBC = tgetstr(__DECONST(char *, "le"), &tbufptr))) {
  43                 if(!tgetflag(__DECONST(char *, "bs")))
  44                         error("Terminal must backspace.");
  45                 tcBC = tbufptr;
  46                 tbufptr += 2;
  47                 *tcBC = '\b';
  48         }
  49         HO = tgetstr(__DECONST(char *, "ho"), &tbufptr);
  50         CO = tgetnum(__DECONST(char *, "co"));
  51         LI = tgetnum(__DECONST(char *, "li"));
  52         if(CO < COLNO || LI < ROWNO+2)
  53                 setclipped();
  54         if(!(CL = tgetstr(__DECONST(char *, "cl"), &tbufptr)))
  55                 error("Hack needs CL.");
  56         ND = tgetstr(__DECONST(char *, "nd"), &tbufptr);
  57         if(tgetflag(__DECONST(char *, "os")))
  58                 error("Hack can't have OS.");
  59         CE = tgetstr(__DECONST(char *, "ce"), &tbufptr);
  60         tcUP = tgetstr(__DECONST(char *, "up"), &tbufptr);
  61         /* It seems that xd is no longer supported, and we should use
  62            a linefeed instead; unfortunately this requires resetting
  63            CRMOD, and many output routines will have to be modified
  64            slightly. Let's leave that till the next release. */
  65         XD = tgetstr(__DECONST(char *, "xd"), &tbufptr);
  66 /* not:                 XD = tgetstr("do", &tbufptr); */
  67         if(!(CM = tgetstr(__DECONST(char *, "cm"), &tbufptr))) {
  68                 if(!tcUP && !HO)
  69                         error("Hack needs CM or UP or HO.");
  70                 printf("Playing hack on terminals without cm is suspect...\n");
  71                 getret();
  72         }
  73         SO = tgetstr(__DECONST(char *, "so"), &tbufptr);
  74         SE = tgetstr(__DECONST(char *, "se"), &tbufptr);
  75         SG = tgetnum(__DECONST(char *, "sg"));
  76         if(!SO || !SE || (SG > 0)) SO = SE = 0;
  77         CD = tgetstr(__DECONST(char *, "cd"), &tbufptr);
  78         set_whole_screen();             /* uses LI and CD */
  79         if(tbufptr-tbuf > (int)sizeof(tbuf)) error("TERMCAP entry too big...\n");
  80         free(tptr);
  81 }
  82
  83 void
  84 start_screen(void)
  85 {
  86         xputs(TI);
  87         xputs(VS);
  88 }
  89
  90 void
  91 end_screen(void)
  92 {
  93         xputs(VE);
  94         xputs(TE);
  95 }
  96
  97 /* not xchar: perhaps xchar is unsigned and curx-x would be unsigned as well */
  98 void
  99 curs(int x, int y)
 100 {
 101
 102         if (y == cury && x == curx)
 103                 return;
 104         if(!ND && (curx != x || x <= 3)) {      /* Extremely primitive */
 105                 cmov(x, y);                     /* bunker!wtm */
 106                 return;
 107         }
 108         if(abs(cury-y) <= 3 && abs(curx-x) <= 3)
 109                 nocmov(x, y);
 110         else if((x <= 3 && abs(cury-y)<= 3) || (!CM && x<abs(curx-x))) {
 111                 putchar('\r');
 112                 curx = 1;
 113                 nocmov(x, y);
 114         } else if(!CM) {
 115                 nocmov(x, y);
 116         } else
 117                 cmov(x, y);
 118 }
 119
 120 static void
 121 nocmov(int x, int y)
 122 {
 123         if (cury > y) {
 124                 if(tcUP) {
 125                         while (cury > y) {      /* Go up. */
 126                                 xputs(tcUP);
 127                                 cury--;
 128                         }
 129                 } else if(CM) {
 130                         cmov(x, y);
 131                 } else if(HO) {
 132                         home();
 133                         curs(x, y);
 134                 } /* else impossible("..."); */
 135         } else if (cury < y) {
 136                 if(XD) {
 137                         while(cury < y) {
 138                                 xputs(XD);
 139                                 cury++;
 140                         }
 141                 } else if(CM) {
 142                         cmov(x, y);
 143                 } else {
 144                         while(cury < y) {
 145                                 xputc('\n');
 146                                 curx = 1;
 147                                 cury++;
 148                         }
 149                 }
 150         }
 151         if (curx < x) {         /* Go to the right. */
 152                 if(!ND) cmov(x, y); else        /* bah */
 153                         /* should instead print what is there already */
 154                 while (curx < x) {
 155                         xputs(ND);
 156                         curx++;
 157                 }
 158         } else if (curx > x) {
 159                 while (curx > x) {      /* Go to the left. */
 160                         xputs(tcBC);
 161                         curx--;
 162                 }
 163         }
 164 }
 165
 166 static void
 167 cmov(int x, int y)
 168 {
 169         xputs(tgoto(CM, x-1, y-1));
 170         cury = y;
 171         curx = x;
 172 }
 173
 174 static int
 175 xputc(int c)
 176 {
 177         return(fputc(c, stdout));
 178 }
 179
 180 static int
 181 xputs(char *s)
 182 {
 183         return(tputs(s, 1, xputc));
 184 }
 185
 186 void
 187 cl_end(void)
 188 {
 189         if(CE)
 190                 xputs(CE);
 191         else {  /* no-CE fix - free after Harold Rynes */
 192                 /* this looks terrible, especially on a slow terminal
 193                    but is better than nothing */
 194                 int cx = curx, cy = cury;
 195
 196                 while(curx < COLNO) {
 197                         xputc(' ');
 198                         curx++;
 199                 }
 200                 curs(cx, cy);
 201         }
 202 }
 203
 204 void
 205 clear_screen(void)
 206 {
 207         xputs(CL);
 208         curx = cury = 1;
 209 }
 210
 211 void
 212 home(void)
 213 {
 214         if(HO)
 215                 xputs(HO);
 216         else if(CM)
 217                 xputs(tgoto(CM, 0, 0));
 218         else
 219                 curs(1, 1);     /* using tcUP ... */
 220         curx = cury = 1;
 221 }
 222
 223 void
 224 standoutbeg(void)
 225 {
 226         if(SO) xputs(SO);
 227 }
 228
 229 void
 230 standoutend(void)
 231 {
 232         if(SE) xputs(SE);
 233 }
 234
 235 void
 236 backsp(void)
 237 {
 238         xputs(tcBC);
 239         curx--;
 240 }
 241
 242 void
 243 bell(void)
 244 {
 245         putchar('\007');                /* curx does not change */
 246         fflush(stdout);
 247 }
 248
 249 void
 250 cl_eos(void)                    /* free after Robert Viduya */
 251 {                               /* must only be called with curx = 1 */
 252
 253         if(CD)
 254                 xputs(CD);
 255         else {
 256                 int cx = curx, cy = cury;
 257                 while(cury <= LI-2) {
 258                         cl_end();
 259                         xputc('\n');
 260                         curx = 1;
 261                         cury++;
 262                 }
 263                 cl_end();
 264                 curs(cx, cy);
 265         }
 266 }