games/larn/io.c

   1 /* io.c                  Larn is copyrighted 1986 by Noah Morgan.
   2  * $FreeBSD: src/games/larn/io.c,v 1.7 1999/11/16 02:57:22 billf Exp $
   3  *
   4  *      Below are the functions in this file:
   5  *
   6  *      setupvt100()    Subroutine to set up terminal in correct mode for game
   7  *      clearvt100()    Subroutine to clean up terminal when the game is over
   8  *      getchar()               Routine to read in one character from the terminal
   9  *      scbr()                  Function to set cbreak -echo for the terminal
  10  *      sncbr()                 Function to set -cbreak echo for the terminal
  11  *      newgame()               Subroutine to save the initial time and seed rnd()
  12  *
  13  *      FILE OUTPUT ROUTINES
  14  *
  15  *      lprintf(format,args . . .)      printf to the output buffer
  16  *      lprint(integer)                         send binary integer to output buffer
  17  *      lwrite(buf,len)                         write a buffer to the output buffer
  18  *      lprcat(str)                                     sent string to output buffer
  19  *
  20  *      FILE OUTPUT MACROS (in header.h)
  21  *
  22  *      lprc(character)                         put the character into the output buffer
  23  *
  24  *      FILE INPUT ROUTINES
  25  *
  26  *      long lgetc()                            read one character from input buffer
  27  *      long lrint()                            read one integer from input buffer
  28  *      lrfill(address,number)          put input bytes into a buffer
  29  *      char *lgetw()                           get a whitespace ended word from input
  30  *      char *lgetl()                           get a \n or EOF ended line from input
  31  *
  32  *      FILE OPEN / CLOSE ROUTINES
  33  *
  34  *      lcreat(filename)                        create a new file for write
  35  *      lopen(filename)                         open a file for read
  36  *      lappend(filename)                       open for append to an existing file
  37  *      lrclose()                                       close the input file
  38  *      lwclose()                                       close output file
  39  *      lflush()                                        flush the output buffer
  40  *
  41  *      Other Routines
  42  *
  43  *      cursor(x,y)                                     position cursor at [x,y]
  44  *      cursors()                                       position cursor at [1,24] (saves memory)
  45  *  cl_line(x,y)                        Clear line at [1,y] and leave cursor at [x,y]
  46  *  cl_up(x,y)                                  Clear screen from [x,1] to current line.
  47  *  cl_dn(x,y)                                  Clear screen from [1,y] to end of display.
  48  *  standout(str)                               Print the string in standout mode.
  49  *  set_score_output()                  Called when output should be literally printed.
  50  ** putchar(ch)                                 Print one character in decoded output buffer.
  51  ** flush_buf()                                 Flush buffer with decoded output.
  52  ** init_term()                                 Terminal initialization -- setup termcap info
  53  **     char *tmcapcnv(sd,ss)           Routine to convert VT100 \33's to termcap format
  54  *      beep()          Routine to emit a beep if enabled (see no-beep in .larnopts)
  55  *
  56  * Note: ** entries are available only in termcap mode.
  57  */
  58
  59 #include "header.h"
  60
  61 #ifdef SYSV     /* system III or system V */
  62 #include <termio.h>
  63 #define sgttyb termio
  64 #define stty(_a,_b) ioctl(_a,TCSETA,_b)
  65 #define gtty(_a,_b) ioctl(_a,TCGETA,_b)
  66 static int rawflg = 0;
  67 static char saveeof,saveeol;
  68 #define doraw(_a) if(!rawflg){++rawflg;saveeof=_a.c_cc[VMIN];saveeol=_a.c_cc[VTIME];}\
  69     _a.c_cc[VMIN]=1;_a.c_cc[VTIME]=1;_a.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL)
  70 #define unraw(_a) _a.c_cc[VMIN]=saveeof;_a.c_cc[VTIME]=saveeol;_a.c_lflag |= ICANON|ECHO|ECHOE|ECHOK|ECHONL
  71
  72 #else not SYSV
  73
  74 #ifndef BSD
  75 #define CBREAK RAW              /* V7 has no CBREAK */
  76 #endif
  77
  78 #define doraw(_a) (_a.sg_flags |= CBREAK,_a.sg_flags &= ~ECHO)
  79 #define unraw(_a) (_a.sg_flags &= ~CBREAK,_a.sg_flags |= ECHO)
  80 #include <sgtty.h>
  81 #endif not SYSV
  82
  83 #ifndef NOVARARGS       /* if we have varargs */
  84 #include <varargs.h>
  85 #else NOVARARGS /* if we don't have varargs */
  86 typedef char *va_list;
  87 #define va_dcl int va_alist;
  88 #define va_start(plist) plist = (char *) &va_alist
  89 #define va_end(plist)
  90 #define va_arg(plist,mode) ((mode *)(plist += sizeof(mode)))[-1]
  91 #endif NOVARARGS
  92
  93 #define LINBUFSIZE 128          /* size of the lgetw() and lgetl() buffer               */
  94 int lfd;                                        /*  output file numbers                                                 */
  95 int fd;                                         /*  input file numbers                                                  */
  96 static struct sgttyb ttx;       /* storage for the tty modes                                    */
  97 static int ipoint=MAXIBUF,iepoint=MAXIBUF;      /*  input buffering pointers    */
  98 static char lgetwbuf[LINBUFSIZE];       /* get line (word) buffer                               */
  99
 100 /*
 101  *      setupvt100()            Subroutine to set up terminal in correct mode for game
 102  *
 103  *      Attributes off, clear screen, set scrolling region, set tty mode
 104  */
 105 setupvt100()
 106         {
 107         clear();  setscroll();  scbr(); /* system("stty cbreak -echo"); */
 108         }
 109
 110 /*
 111  *      clearvt100()            Subroutine to clean up terminal when the game is over
 112  *
 113  *      Attributes off, clear screen, unset scrolling region, restore tty mode
 114  */
 115 clearvt100()
 116         {
 117         resetscroll();  clear();  sncbr(); /* system("stty -cbreak echo"); */
 118         }
 119
 120 /*
 121  *      getchar()               Routine to read in one character from the terminal
 122  */
 123 getchar()
 124         {
 125         char byt;
 126 #ifdef EXTRA
 127         c[BYTESIN]++;
 128 #endif
 129         lflush();               /* be sure output buffer is flushed */
 130         read(0,&byt,1);         /* get byte from terminal */
 131         return(byt);
 132         }
 133
 134 /*
 135  *      scbr()          Function to set cbreak -echo for the terminal
 136  *
 137  *      like: system("stty cbreak -echo")
 138  */
 139 scbr()
 140         {
 141         gtty(0,&ttx);           doraw(ttx);             stty(0,&ttx);
 142         }
 143
 144 /*
 145  *      sncbr()         Function to set -cbreak echo for the terminal
 146  *
 147  *      like: system("stty -cbreak echo")
 148  */
 149 sncbr()
 150         {
 151         gtty(0,&ttx);           unraw(ttx);             stty(0,&ttx);
 152         }
 153
 154 /*
 155  *      newgame()               Subroutine to save the initial time and seed rnd()
 156  */
 157 newgame()
 158         {
 159         long *p,*pe;
 160         for (p=c,pe=c+100; p<pe; *p++ =0);
 161         time(&initialtime);             srandomdev();
 162         lcreat((char*)0);       /* open buffering for output to terminal */
 163         }
 164
 165 /*
 166  *      lprintf(format,args . . .)              printf to the output buffer
 167  *              char *format;
 168  *              ??? args . . .
 169  *
 170  *      Enter with the format string in "format", as per printf() usage
 171  *              and any needed arguments following it
 172  *      Note: lprintf() only supports %s, %c and %d, with width modifier and left
 173  *              or right justification.
 174  *      No correct checking for output buffer overflow is done, but flushes
 175  *              are done beforehand if needed.
 176  *      Returns nothing of value.
 177  */
 178 #ifdef lint
 179 /*VARARGS*/
 180 lprintf(str)
 181         char *str;
 182         {
 183         char *str2;
 184         str2 = str;
 185         str = str2; /* to make lint happy */
 186         }
 187 /*VARARGS*/
 188 sprintf(str)
 189         char *str;
 190         {
 191         char *str2;
 192         str2 = str;
 193         str = str2; /* to make lint happy */
 194         }
 195 #else lint
 196 /*VARARGS*/
 197 lprintf(va_alist)
 198 va_dcl
 199     {
 200         va_list ap;     /* pointer for variable argument list */
 201         char *fmt;
 202         char *outb,*tmpb;
 203         long wide,left,cont,n;          /* data for lprintf     */
 204         char db[12];                    /* %d buffer in lprintf */
 205
 206         va_start(ap);   /* initialize the var args pointer */
 207         fmt = va_arg(ap, char *);       /* pointer to format string */
 208         if (lpnt >= lpend) lflush();
 209         outb = lpnt;
 210         for ( ; ; )
 211                 {
 212                 while (*fmt != '%')
 213                         if (*fmt) *outb++ = *fmt++;  else { lpnt=outb;  return; }
 214                 wide = 0;       left = 1;       cont=1;
 215                 while (cont)
 216                   switch(*(++fmt))
 217                         {
 218                         case 'd':       n = va_arg(ap, long);
 219                                                 if (n<0) { n = -n;  *outb++ = '-';  if (wide) --wide; }
 220                                                 tmpb = db+11;   *tmpb = (char)(n % 10 + '0');
 221                                                 while (n>9)  *(--tmpb) = (char)((n /= 10) % 10 + '0');
 222                                                 if (wide==0)  while (tmpb < db+12) *outb++ = *tmpb++;
 223                                                 else
 224                                                         {
 225                                                         wide -= db-tmpb+12;
 226                                                         if (left)  while (wide-- > 0) *outb++ = ' ';
 227                                                         while (tmpb < db+12) *outb++ = *tmpb++;
 228                                                         if (left==0)  while (wide-- > 0) *outb++ = ' ';
 229                                                         }
 230                                                 cont=0; break;
 231
 232                         case 's':       tmpb = va_arg(ap, char *);
 233                                                 if (wide==0)  { while (*outb++ = *tmpb++);  --outb; }
 234                                                 else
 235                                                         {
 236                                                         n = wide - strlen(tmpb);
 237                                                         if (left)  while (n-- > 0) *outb++ = ' ';
 238                                                         while (*outb++ = *tmpb++);  --outb;
 239                                                         if (left==0)  while (n-- > 0) *outb++ = ' ';
 240                                                         }
 241                                                 cont=0; break;
 242
 243                         case 'c':       *outb++ = va_arg(ap, int);      cont=0;  break;
 244
 245                         case '0':
 246                         case '1':
 247                         case '2':
 248                         case '3':
 249                         case '4':
 250                         case '5':
 251                         case '6':
 252                         case '7':
 253                         case '8':
 254                         case '9':       wide = 10*wide + *fmt - '0';    break;
 255
 256                         case '-':       left = 0;       break;
 257
 258                         default:        *outb++ = *fmt;  cont=0;        break;
 259                         };
 260                 fmt++;
 261                 }
 262         va_end(ap);
 263         }
 264 #endif lint
 265
 266 /*
 267  *      lprint(long-integer)                            send binary integer to output buffer
 268  *              long integer;
 269  *
 270  *              +---------+---------+---------+---------+
 271  *              |       high  |                 |                 |       low   |
 272  *              |  order  |                     |                 |  order      |
 273  *              |   byte  |                     |                 |       byte  |
 274  *              +---------+---------+---------+---------+
 275  *         31  ---  24 23 --- 16 15 ---  8 7  ---   0
 276  *
 277  *      The save order is low order first, to high order (4 bytes total)
 278  *              and is written to be system independent.
 279  *      No checking for output buffer overflow is done, but flushes if needed!
 280  *      Returns nothing of value.
 281  */
 282 lprint(x)
 283         long x;
 284         {
 285         if (lpnt >= lpend) lflush();
 286         *lpnt++ =  255 & x;                     *lpnt++ =  255 & (x>>8);
 287         *lpnt++ =  255 & (x>>16);       *lpnt++ =  255 & (x>>24);
 288         }
 289
 290 /*
 291  *      lwrite(buf,len)                                 write a buffer to the output buffer
 292  *              char *buf;
 293  *              int len;
 294  *
 295  *      Enter with the address and number of bytes to write out
 296  *      Returns nothing of value
 297  */
 298 lwrite(buf,len)
 299     char *buf;
 300     int len;
 301     {
 302         char *str;
 303         int num2;
 304         if (len > 399)  /* don't copy data if can just write it */
 305                 {
 306 #ifdef EXTRA
 307                 c[BYTESOUT] += len;
 308 #endif
 309
 310 #ifndef VT100
 311                 for (str=buf;  len>0; --len)
 312                         lprc(*str++);
 313 #else VT100
 314                 lflush();
 315                 write(lfd,buf,len);
 316 #endif VT100
 317                 }
 318         else while (len)
 319                 {
 320                 if (lpnt >= lpend) lflush();    /* if buffer is full flush it   */
 321                 num2 = lpbuf+BUFBIG-lpnt;       /*      # bytes left in output buffer   */
 322                 if (num2 > len) num2=len;
 323                 str = lpnt;  len -= num2;
 324                 while (num2--)  *str++ = *buf++;        /* copy in the bytes */
 325                 lpnt = str;
 326                 }
 327     }
 328
 329 /*
 330  *      long lgetc()                            Read one character from input buffer
 331  *
 332  *  Returns 0 if EOF, otherwise the character
 333  */
 334 long lgetc()
 335     {
 336     int i;
 337     if (ipoint != iepoint)  return(inbuffer[ipoint++]);
 338     if (iepoint!=MAXIBUF)   return(0);
 339     if ((i=read(fd,inbuffer,MAXIBUF))<=0)
 340         {
 341         if (i!=0)  write(1,"error reading from input file\n",30);
 342                 iepoint = ipoint = 0;           return(0);
 343         }
 344     ipoint=1;  iepoint=i;  return(*inbuffer);
 345     }
 346
 347 /*
 348  *      long lrint()                    Read one integer from input buffer
 349  *
 350  *              +---------+---------+---------+---------+
 351  *              |       high  |                 |                 |       low   |
 352  *              |  order  |                     |                 |  order      |
 353  *              |   byte  |                     |                 |       byte  |
 354  *              +---------+---------+---------+---------+
 355  *         31  ---  24 23 --- 16 15 ---  8 7  ---   0
 356  *
 357  *      The save order is low order first, to high order (4 bytes total)
 358  *      Returns the int read
 359  */
 360 long lrint()
 361         {
 362         unsigned long i;
 363         i  = 255 & lgetc();                             i |= (255 & lgetc()) << 8;
 364         i |= (255 & lgetc()) << 16;             i |= (255 & lgetc()) << 24;
 365         return(i);
 366         }
 367
 368 /*
 369  *      lrfill(address,number)                  put input bytes into a buffer
 370  *              char *address;
 371  *              int number;
 372  *
 373  *      Reads "number" bytes into the buffer pointed to by "address".
 374  *      Returns nothing of value
 375  */
 376 lrfill(adr,num)
 377         char *adr;
 378         int num;
 379         {
 380         char *pnt;
 381         int num2;
 382         while (num)
 383                 {
 384                 if (iepoint == ipoint)
 385                         {
 386                         if (num>5) /* fast way */
 387                                 {
 388                                 if (read(fd,adr,num) != num)
 389                                         write(2,"error reading from input file\n",30);
 390                                 num=0;
 391                                 }
 392                         else { *adr++ = lgetc();  --num; }
 393                         }
 394                 else
 395                         {
 396                         num2 = iepoint-ipoint;  /*      # of bytes left in the buffer   */
 397                         if (num2 > num) num2=num;
 398                         pnt = inbuffer+ipoint;  num -= num2;  ipoint += num2;
 399                         while (num2--)  *adr++ = *pnt++;
 400                         }
 401                 }
 402         }
 403
 404 /*
 405  *      char *lgetw()                   Get a whitespace ended word from input
 406  *
 407  *      Returns pointer to a buffer that contains word.  If EOF, returns a NULL
 408  */
 409 char *lgetw()
 410         {
 411         char *lgp,cc;
 412         int n=LINBUFSIZE,quote=0;
 413         lgp = lgetwbuf;
 414         do cc=lgetc();  while ((cc <= 32) && (cc > NULL));  /* eat whitespace */
 415         for ( ; ; --n,cc=lgetc())
 416                 {
 417                 if ((cc==NULL) && (lgp==lgetwbuf))  return(NULL);       /* EOF */
 418                 if ((n<=1) || ((cc<=32) && (quote==0))) { *lgp=NULL; return(lgetwbuf); }
 419                 if (cc != '"') *lgp++ = cc;   else quote ^= 1;
 420                 }
 421         }
 422
 423 /*
 424  *      char *lgetl()           Function to read in a line ended by newline or EOF
 425  *
 426  *      Returns pointer to a buffer that contains the line.  If EOF, returns NULL
 427  */
 428 char *lgetl()
 429         {
 430         int i=LINBUFSIZE,ch;
 431         char *str=lgetwbuf;
 432         for ( ; ; --i)
 433                 {
 434                 if ((*str++ = ch = lgetc()) == NULL)
 435                         {
 436                         if (str == lgetwbuf+1)  return(NULL); /* EOF */
 437                 ot:     *str = NULL;    return(lgetwbuf);       /* line ended by EOF */
 438                         }
 439                 if ((ch=='\n') || (i<=1))  goto ot; /* line ended by \n */
 440                 }
 441         }
 442
 443 /*
 444  *      lcreat(filename)                        Create a new file for write
 445  *              char *filename;
 446  *
 447  *      lcreat((char*)0); means to the terminal
 448  *      Returns -1 if error, otherwise the file descriptor opened.
 449  */
 450 lcreat(str)
 451         char *str;
 452         {
 453         lpnt = lpbuf;   lpend = lpbuf+BUFBIG;
 454         if (str==NULL) return(lfd=1);
 455         if ((lfd=creat(str,0644)) < 0)
 456                 {
 457                 lfd=1; lprintf("error creating file <%s>\n",str); lflush(); return(-1);
 458                 }
 459         return(lfd);
 460         }
 461
 462 /*
 463  *      lopen(filename)                 Open a file for read
 464  *              char *filename;
 465  *
 466  *      lopen(0) means from the terminal
 467  *      Returns -1 if error, otherwise the file descriptor opened.
 468  */
 469 lopen(str)
 470         char *str;
 471         {
 472         ipoint = iepoint = MAXIBUF;
 473         if (str==NULL) return(fd=0);
 474         if ((fd=open(str,0)) < 0)
 475                 {
 476                 lwclose(); lfd=1; lpnt=lpbuf; return(-1);
 477                 }
 478         return(fd);
 479         }
 480
 481 /*
 482  *      lappend(filename)               Open for append to an existing file
 483  *              char *filename;
 484  *
 485  *      lappend(0) means to the terminal
 486  *      Returns -1 if error, otherwise the file descriptor opened.
 487  */
 488 lappend(str)
 489         char *str;
 490         {
 491         lpnt = lpbuf;   lpend = lpbuf+BUFBIG;
 492         if (str==NULL) return(lfd=1);
 493         if ((lfd=open(str,2)) < 0)
 494                 {
 495                 lfd=1; return(-1);
 496                 }
 497         lseek(lfd,0,2); /* seek to end of file */
 498         return(lfd);
 499         }
 500
 501 /*
 502  *      lrclose()                                               close the input file
 503  *
 504  *      Returns nothing of value.
 505  */
 506 lrclose()
 507         {
 508         if (fd > 0) close(fd);
 509         }
 510
 511 /*
 512  *      lwclose()                                               close output file flushing if needed
 513  *
 514  *      Returns nothing of value.
 515  */
 516 lwclose()
 517         {
 518         lflush();       if (lfd > 2) close(lfd);
 519         }
 520
 521 /*
 522  *      lprcat(string)                                  append a string to the output buffer
 523  *                                                                  avoids calls to lprintf (time consuming)
 524  */
 525 lprcat(str)
 526     char *str;
 527     {
 528         char *str2;
 529         if (lpnt >= lpend) lflush();
 530         str2 = lpnt;
 531         while (*str2++ = *str++);
 532         lpnt = str2 - 1;
 533     }
 534
 535 #ifdef VT100
 536 /*
 537  *      cursor(x,y)             Subroutine to set the cursor position
 538  *
 539  *      x and y are the cursor coordinates, and lpbuff is the output buffer where
 540  *      escape sequence will be placed.
 541  */
 542 static char *y_num[]= { "\33[","\33[","\33[2","\33[3","\33[4","\33[5","\33[6",
 543         "\33[7","\33[8","\33[9","\33[10","\33[11","\33[12","\33[13","\33[14",
 544         "\33[15","\33[16","\33[17","\33[18","\33[19","\33[20","\33[21","\33[22",
 545         "\33[23","\33[24" };
 546
 547 static char *x_num[]= { "H","H",";2H",";3H",";4H",";5H",";6H",";7H",";8H",";9H",
 548         ";10H",";11H",";12H",";13H",";14H",";15H",";16H",";17H",";18H",";19H",
 549         ";20H",";21H",";22H",";23H",";24H",";25H",";26H",";27H",";28H",";29H",
 550         ";30H",";31H",";32H",";33H",";34H",";35H",";36H",";37H",";38H",";39H",
 551         ";40H",";41H",";42H",";43H",";44H",";45H",";46H",";47H",";48H",";49H",
 552         ";50H",";51H",";52H",";53H",";54H",";55H",";56H",";57H",";58H",";59H",
 553         ";60H",";61H",";62H",";63H",";64H",";65H",";66H",";67H",";68H",";69H",
 554         ";70H",";71H",";72H",";73H",";74H",";75H",";76H",";77H",";78H",";79H",
 555         ";80H" };
 556
 557 cursor(x,y)
 558         int x,y;
 559         {
 560         char *p;
 561         if (lpnt >= lpend) lflush();
 562
 563         p = y_num[y];   /* get the string to print */
 564         while (*p) *lpnt++ = *p++;      /* print the string */
 565
 566         p = x_num[x];   /* get the string to print */
 567         while (*p) *lpnt++ = *p++;      /* print the string */
 568         }
 569 #else VT100
 570 /*
 571  * cursor(x,y)    Put cursor at specified coordinates staring at [1,1] (termcap)
 572  */
 573 cursor (x,y)
 574         int x,y;
 575         {
 576         if (lpnt >= lpend) lflush ();
 577
 578         *lpnt++ = CURSOR;               *lpnt++ = x;            *lpnt++ = y;
 579         }
 580 #endif VT100
 581
 582 /*
 583  *      Routine to position cursor at beginning of 24th line
 584  */
 585 cursors()
 586         {
 587         cursor(1,24);
 588         }
 589
 590 #ifndef VT100
 591 /*
 592  * Warning: ringing the bell is control code 7. Don't use in defines.
 593  * Don't change the order of these defines.
 594  * Also used in helpfiles. Codes used in helpfiles should be \E[1 to \E[7 with
 595  * obvious meanings.
 596  */
 597
 598 static char cap[256];
 599 char *CM, *CE, *CD, *CL, *SO, *SE, *AL, *DL;/* Termcap capabilities */
 600 static char *outbuf=0;  /* translated output buffer */
 601
 602 int putchar ();
 603
 604 /*
 605  * init_term()          Terminal initialization -- setup termcap info
 606  */
 607 init_term()
 608         {
 609         char termbuf[1024];
 610         char *capptr = cap+10;
 611         char *term;
 612         struct sgttyb tt;
 613
 614         switch (tgetent(termbuf, term = getenv("TERM")))
 615                 {
 616                 case -1:
 617                         write(2, "Cannot open termcap file.\n", 26); exit(1);
 618                 case 0:
 619                         write(2, "Cannot find entry of ", 21);
 620                         write(2, term, strlen (term));
 621                         write(2, " in termcap\n", 12);
 622                         exit(1);
 623                 };
 624
 625         if (gtty(0, &tt) == 0)
 626                 /* ospeed = tt.sg_ospeed */ ;
 627
 628         CM = tgetstr("cm", &capptr);  /* Cursor motion */
 629         CE = tgetstr("ce", &capptr);  /* Clear to eoln */
 630         CL = tgetstr("cl", &capptr);  /* Clear screen */
 631
 632 /* OPTIONAL */
 633         AL = tgetstr("al", &capptr);  /* Insert line */
 634         DL = tgetstr("dl", &capptr);  /* Delete line */
 635         SO = tgetstr("so", &capptr);  /* Begin standout mode */
 636         SE = tgetstr("se", &capptr);  /* End standout mode */
 637         CD = tgetstr("cd", &capptr);  /* Clear to end of display */
 638
 639         if (!CM)        /* can't find cursor motion entry */
 640                 {
 641                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 642                 write(2, ", I can't find the cursor motion entry in termcap\n",50);
 643                 exit(1);
 644                 }
 645         if (!CE)        /* can't find clear to end of line entry */
 646                 {
 647                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 648                 write(2,", I can't find the clear to end of line entry in termcap\n",57);
 649                 exit(1);
 650                 }
 651         if (!CL)        /* can't find clear entire screen entry */
 652                 {
 653                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 654                 write(2, ", I can't find the clear entire screen entry in termcap\n",56);
 655                 exit(1);
 656                 }
 657         if ((outbuf=malloc(BUFBIG+16))==0) /* get memory for decoded output buffer*/
 658                 {
 659                 write(2,"Error malloc'ing memory for decoded output buffer\n",50);
 660                 died(-285);     /* malloc() failure */
 661                 }
 662         }
 663 #endif VT100
 664
 665 /*
 666  * cl_line(x,y)  Clear the whole line indicated by 'y' and leave cursor at [x,y]
 667  */
 668 cl_line(x,y)
 669         int x,y;
 670         {
 671 #ifdef VT100
 672         cursor(x,y);            lprcat("\33[2K");
 673 #else VT100
 674         cursor(1,y);            *lpnt++ = CL_LINE;              cursor(x,y);
 675 #endif VT100
 676         }
 677
 678 /*
 679  * cl_up(x,y) Clear screen from [x,1] to current position. Leave cursor at [x,y]
 680  */
 681 cl_up(x,y)
 682         int x,y;
 683         {
 684 #ifdef VT100
 685         cursor(x,y);  lprcat("\33[1J\33[2K");
 686 #else VT100
 687         int i;
 688         cursor(1,1);
 689         for (i=1; i<=y; i++)   { *lpnt++ = CL_LINE;  *lpnt++ = '\n'; }
 690         cursor(x,y);
 691 #endif VT100
 692         }
 693
 694 /*
 695  * cl_dn(x,y)   Clear screen from [1,y] to end of display. Leave cursor at [x,y]
 696  */
 697 cl_dn(x,y)
 698         int x,y;
 699         {
 700 #ifdef VT100
 701         cursor(x,y); lprcat("\33[J\33[2K");
 702 #else VT100
 703         int i;
 704         cursor(1,y);
 705         if (!CD)
 706                 {
 707                 *lpnt++ = CL_LINE;
 708                 for (i=y; i<=24; i++) { *lpnt++ = CL_LINE;  if (i!=24) *lpnt++ = '\n'; }
 709                 cursor(x,y);
 710                 }
 711         else
 712                 *lpnt++ = CL_DOWN;
 713         cursor(x,y);
 714 #endif VT100
 715         }
 716
 717 /*
 718  * standout(str)        Print the argument string in inverse video (standout mode).
 719  */
 720 standout(str)
 721         char *str;
 722         {
 723 #ifdef VT100
 724         setbold();
 725         while (*str)
 726                 *lpnt++ = *str++;
 727         resetbold();
 728 #else VT100
 729         *lpnt++ = ST_START;
 730         while (*str)
 731                 *lpnt++ = *str++;
 732         *lpnt++ = ST_END;
 733 #endif VT100
 734         }
 735
 736 /*
 737  * set_score_output()   Called when output should be literally printed.
 738  */
 739 set_score_output()
 740         {
 741         enable_scroll = -1;
 742         }
 743
 744 /*
 745  *      lflush()                                                Flush the output buffer
 746  *
 747  *      Returns nothing of value.
 748  *      for termcap version: Flush output in output buffer according to output
 749  *                                                      status as indicated by `enable_scroll'
 750  */
 751 #ifndef VT100
 752 static int scrline=18; /* line # for wraparound instead of scrolling if no DL */
 753 lflush ()
 754         {
 755         int lpoint;
 756         char *str;
 757         static int curx = 0;
 758         static int cury = 0;
 759
 760         if ((lpoint = lpnt - lpbuf) > 0)
 761                 {
 762 #ifdef EXTRA
 763                 c[BYTESOUT] += lpoint;
 764 #endif
 765                 if (enable_scroll <= -1)
 766                         {
 767                         flush_buf();
 768                 if (write(lfd,lpbuf,lpoint) != lpoint)
 769                                 write(2,"error writing to output file\n",29);
 770                         lpnt = lpbuf;   /* point back to beginning of buffer */
 771                         return;
 772                         }
 773                 for (str = lpbuf; str < lpnt; str++)
 774                         {
 775                         if (*str>=32)   { putchar (*str); curx++; }
 776                         else switch (*str)
 777                                 {
 778                                 case CLEAR:             tputs (CL, 0, putchar);         curx = cury = 0;
 779                                                                 break;
 780
 781                                 case CL_LINE:   tputs (CE, 0, putchar);
 782                                                                 break;
 783
 784                                 case CL_DOWN:   tputs (CD, 0, putchar);
 785                                                                 break;
 786
 787                                 case ST_START:  tputs (SO, 0, putchar);
 788                                                                 break;
 789
 790                                 case ST_END:    tputs (SE, 0, putchar);
 791                                                                 break;
 792
 793                                 case CURSOR:    curx = *++str - 1;              cury = *++str - 1;
 794                                                                 tputs (tgoto (CM, curx, cury), 0, putchar);
 795                                                                 break;
 796
 797                                 case '\n':              if ((cury == 23) && enable_scroll)
 798                                                                   {
 799                                                                   if (!DL || !AL) /* wraparound or scroll? */
 800                                                                         {
 801                                                                         if (++scrline > 23) scrline=19;
 802
 803                                                                         if (++scrline > 23) scrline=19;
 804                                                                         tputs (tgoto (CM, 0, scrline), 0, putchar);
 805                                                                         tputs (CE, 0, putchar);
 806
 807                                                                         if (--scrline < 19) scrline=23;
 808                                                                         tputs (tgoto (CM, 0, scrline), 0, putchar);
 809                                                                         tputs (CE, 0, putchar);
 810                                                                         }
 811                                                                   else
 812                                                                         {
 813                                                                         tputs (tgoto (CM, 0, 19), 0, putchar);
 814                                                                         tputs (DL, 0, putchar);
 815                                                                         tputs (tgoto (CM, 0, 23), 0, putchar);
 816                                                                 /*      tputs (AL, 0, putchar); */
 817                                                                         }
 818                                                                   }
 819                                                                 else
 820                                                                   {
 821                                                                   putchar ('\n');               cury++;
 822                                                                   }
 823                                                                 curx = 0;
 824                                                                 break;
 825
 826                                 default:                putchar (*str); curx++;
 827                                 };
 828                         }
 829                 }
 830         lpnt = lpbuf;
 831         flush_buf();    /* flush real output buffer now */
 832         }
 833 #else VT100
 834 /*
 835  *      lflush()                                                flush the output buffer
 836  *
 837  *      Returns nothing of value.
 838  */
 839 lflush()
 840     {
 841         int lpoint;
 842         if ((lpoint = lpnt - lpbuf) > 0)
 843         {
 844 #ifdef EXTRA
 845                 c[BYTESOUT] += lpoint;
 846 #endif
 847         if (write(lfd,lpbuf,lpoint) != lpoint)
 848                         write(2,"error writing to output file\n",29);
 849         }
 850         lpnt = lpbuf;   /* point back to beginning of buffer */
 851     }
 852 #endif VT100
 853
 854 #ifndef VT100
 855 static int pindex=0;
 856 /*
 857  * putchar(ch)          Print one character in decoded output buffer.
 858  */
 859 int putchar(c)
 860 int c;
 861         {
 862         outbuf[pindex++] = c;
 863         if (pindex >= BUFBIG)  flush_buf();
 864         }
 865
 866 /*
 867  * flush_buf()                  Flush buffer with decoded output.
 868  */
 869 flush_buf()
 870         {
 871         if (pindex) write(lfd, outbuf, pindex);
 872         pindex = 0;
 873         }
 874
 875 /*
 876  *      char *tmcapcnv(sd,ss)  Routine to convert VT100 escapes to termcap format
 877  *
 878  *      Processes only the \33[#m sequence (converts . files for termcap use
 879  */
 880 char *tmcapcnv(sd,ss)
 881         char *sd,*ss;
 882         {
 883         int tmstate=0;  /* 0=normal, 1=\33 2=[ 3=# */
 884         char tmdigit=0; /* the # in \33[#m */
 885         while (*ss)
 886                 {
 887                 switch(tmstate)
 888                         {
 889                         case 0: if (*ss=='\33')  { tmstate++; break; }
 890                           ign:  *sd++ = *ss;
 891                           ign2: tmstate = 0;
 892                                         break;
 893                         case 1: if (*ss!='[') goto ign;
 894                                         tmstate++;
 895                                         break;
 896                         case 2: if (isdigit(*ss)) { tmdigit= *ss-'0'; tmstate++; break; }
 897                                         if (*ss == 'm') { *sd++ = ST_END; goto ign2; }
 898                                         goto ign;
 899                         case 3: if (*ss == 'm')
 900                                                 {
 901                                                 if (tmdigit) *sd++ = ST_START;
 902                                                         else *sd++ = ST_END;
 903                                                 goto ign2;
 904                                                 }
 905                         default: goto ign;
 906                         };
 907                 ss++;
 908                 }
 909         *sd=0; /* NULL terminator */
 910         return(sd);
 911         }
 912 #endif VT100
 913
 914 /*
 915  *      beep()          Routine to emit a beep if enabled (see no-beep in .larnopts)
 916  */
 917 beep()
 918         {
 919         if (!nobeep) *lpnt++ = '\7';
 920         }