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  * $DragonFly: src/games/larn/io.c,v 1.2 2003/06/17 04:25:24 dillon Exp $
   4  *
   5  *      Below are the functions in this file:
   6  *
   7  *      setupvt100()    Subroutine to set up terminal in correct mode for game
   8  *      clearvt100()    Subroutine to clean up terminal when the game is over
   9  *      getchar()               Routine to read in one character from the terminal
  10  *      scbr()                  Function to set cbreak -echo for the terminal
  11  *      sncbr()                 Function to set -cbreak echo for the terminal
  12  *      newgame()               Subroutine to save the initial time and seed rnd()
  13  *
  14  *      FILE OUTPUT ROUTINES
  15  *
  16  *      lprintf(format,args . . .)      printf to the output buffer
  17  *      lprint(integer)                         send binary integer to output buffer
  18  *      lwrite(buf,len)                         write a buffer to the output buffer
  19  *      lprcat(str)                                     sent string to output buffer
  20  *
  21  *      FILE OUTPUT MACROS (in header.h)
  22  *
  23  *      lprc(character)                         put the character into the output buffer
  24  *
  25  *      FILE INPUT ROUTINES
  26  *
  27  *      long lgetc()                            read one character from input buffer
  28  *      long lrint()                            read one integer from input buffer
  29  *      lrfill(address,number)          put input bytes into a buffer
  30  *      char *lgetw()                           get a whitespace ended word from input
  31  *      char *lgetl()                           get a \n or EOF ended line from input
  32  *
  33  *      FILE OPEN / CLOSE ROUTINES
  34  *
  35  *      lcreat(filename)                        create a new file for write
  36  *      lopen(filename)                         open a file for read
  37  *      lappend(filename)                       open for append to an existing file
  38  *      lrclose()                                       close the input file
  39  *      lwclose()                                       close output file
  40  *      lflush()                                        flush the output buffer
  41  *
  42  *      Other Routines
  43  *
  44  *      cursor(x,y)                                     position cursor at [x,y]
  45  *      cursors()                                       position cursor at [1,24] (saves memory)
  46  *  cl_line(x,y)                        Clear line at [1,y] and leave cursor at [x,y]
  47  *  cl_up(x,y)                                  Clear screen from [x,1] to current line.
  48  *  cl_dn(x,y)                                  Clear screen from [1,y] to end of display.
  49  *  standout(str)                               Print the string in standout mode.
  50  *  set_score_output()                  Called when output should be literally printed.
  51  ** putchar(ch)                                 Print one character in decoded output buffer.
  52  ** flush_buf()                                 Flush buffer with decoded output.
  53  ** init_term()                                 Terminal initialization -- setup termcap info
  54  **     char *tmcapcnv(sd,ss)           Routine to convert VT100 \33's to termcap format
  55  *      beep()          Routine to emit a beep if enabled (see no-beep in .larnopts)
  56  *
  57  * Note: ** entries are available only in termcap mode.
  58  */
  59
  60 #include "header.h"
  61
  62 #ifdef SYSV     /* system III or system V */
  63 #include <termio.h>
  64 #define sgttyb termio
  65 #define stty(_a,_b) ioctl(_a,TCSETA,_b)
  66 #define gtty(_a,_b) ioctl(_a,TCGETA,_b)
  67 static int rawflg = 0;
  68 static char saveeof,saveeol;
  69 #define doraw(_a) if(!rawflg){++rawflg;saveeof=_a.c_cc[VMIN];saveeol=_a.c_cc[VTIME];}\
  70     _a.c_cc[VMIN]=1;_a.c_cc[VTIME]=1;_a.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL)
  71 #define unraw(_a) _a.c_cc[VMIN]=saveeof;_a.c_cc[VTIME]=saveeol;_a.c_lflag |= ICANON|ECHO|ECHOE|ECHOK|ECHONL
  72
  73 #else not SYSV
  74
  75 #ifndef BSD
  76 #define CBREAK RAW              /* V7 has no CBREAK */
  77 #endif
  78
  79 #define doraw(_a) (_a.sg_flags |= CBREAK,_a.sg_flags &= ~ECHO)
  80 #define unraw(_a) (_a.sg_flags &= ~CBREAK,_a.sg_flags |= ECHO)
  81 #include <sgtty.h>
  82 #endif not SYSV
  83
  84 #ifndef NOVARARGS       /* if we have varargs */
  85 #include <varargs.h>
  86 #else NOVARARGS /* if we don't have varargs */
  87 typedef char *va_list;
  88 #define va_dcl int va_alist;
  89 #define va_start(plist) plist = (char *) &va_alist
  90 #define va_end(plist)
  91 #define va_arg(plist,mode) ((mode *)(plist += sizeof(mode)))[-1]
  92 #endif NOVARARGS
  93
  94 #define LINBUFSIZE 128          /* size of the lgetw() and lgetl() buffer               */
  95 int lfd;                                        /*  output file numbers                                                 */
  96 int fd;                                         /*  input file numbers                                                  */
  97 static struct sgttyb ttx;       /* storage for the tty modes                                    */
  98 static int ipoint=MAXIBUF,iepoint=MAXIBUF;      /*  input buffering pointers    */
  99 static char lgetwbuf[LINBUFSIZE];       /* get line (word) buffer                               */
 100
 101 /*
 102  *      setupvt100()            Subroutine to set up terminal in correct mode for game
 103  *
 104  *      Attributes off, clear screen, set scrolling region, set tty mode
 105  */
 106 setupvt100()
 107         {
 108         clear();  setscroll();  scbr(); /* system("stty cbreak -echo"); */
 109         }
 110
 111 /*
 112  *      clearvt100()            Subroutine to clean up terminal when the game is over
 113  *
 114  *      Attributes off, clear screen, unset scrolling region, restore tty mode
 115  */
 116 clearvt100()
 117         {
 118         resetscroll();  clear();  sncbr(); /* system("stty -cbreak echo"); */
 119         }
 120
 121 /*
 122  *      getchar()               Routine to read in one character from the terminal
 123  */
 124 getchar()
 125         {
 126         char byt;
 127 #ifdef EXTRA
 128         c[BYTESIN]++;
 129 #endif
 130         lflush();               /* be sure output buffer is flushed */
 131         read(0,&byt,1);         /* get byte from terminal */
 132         return(byt);
 133         }
 134
 135 /*
 136  *      scbr()          Function to set cbreak -echo for the terminal
 137  *
 138  *      like: system("stty cbreak -echo")
 139  */
 140 scbr()
 141         {
 142         gtty(0,&ttx);           doraw(ttx);             stty(0,&ttx);
 143         }
 144
 145 /*
 146  *      sncbr()         Function to set -cbreak echo for the terminal
 147  *
 148  *      like: system("stty -cbreak echo")
 149  */
 150 sncbr()
 151         {
 152         gtty(0,&ttx);           unraw(ttx);             stty(0,&ttx);
 153         }
 154
 155 /*
 156  *      newgame()               Subroutine to save the initial time and seed rnd()
 157  */
 158 newgame()
 159         {
 160         long *p,*pe;
 161         for (p=c,pe=c+100; p<pe; *p++ =0);
 162         time(&initialtime);             srandomdev();
 163         lcreat((char*)0);       /* open buffering for output to terminal */
 164         }
 165
 166 /*
 167  *      lprintf(format,args . . .)              printf to the output buffer
 168  *              char *format;
 169  *              ??? args . . .
 170  *
 171  *      Enter with the format string in "format", as per printf() usage
 172  *              and any needed arguments following it
 173  *      Note: lprintf() only supports %s, %c and %d, with width modifier and left
 174  *              or right justification.
 175  *      No correct checking for output buffer overflow is done, but flushes
 176  *              are done beforehand if needed.
 177  *      Returns nothing of value.
 178  */
 179 #ifdef lint
 180 /*VARARGS*/
 181 lprintf(str)
 182         char *str;
 183         {
 184         char *str2;
 185         str2 = str;
 186         str = str2; /* to make lint happy */
 187         }
 188 /*VARARGS*/
 189 sprintf(str)
 190         char *str;
 191         {
 192         char *str2;
 193         str2 = str;
 194         str = str2; /* to make lint happy */
 195         }
 196 #else lint
 197 /*VARARGS*/
 198 lprintf(va_alist)
 199 va_dcl
 200     {
 201         va_list ap;     /* pointer for variable argument list */
 202         char *fmt;
 203         char *outb,*tmpb;
 204         long wide,left,cont,n;          /* data for lprintf     */
 205         char db[12];                    /* %d buffer in lprintf */
 206
 207         va_start(ap);   /* initialize the var args pointer */
 208         fmt = va_arg(ap, char *);       /* pointer to format string */
 209         if (lpnt >= lpend) lflush();
 210         outb = lpnt;
 211         for ( ; ; )
 212                 {
 213                 while (*fmt != '%')
 214                         if (*fmt) *outb++ = *fmt++;  else { lpnt=outb;  return; }
 215                 wide = 0;       left = 1;       cont=1;
 216                 while (cont)
 217                   switch(*(++fmt))
 218                         {
 219                         case 'd':       n = va_arg(ap, long);
 220                                                 if (n<0) { n = -n;  *outb++ = '-';  if (wide) --wide; }
 221                                                 tmpb = db+11;   *tmpb = (char)(n % 10 + '0');
 222                                                 while (n>9)  *(--tmpb) = (char)((n /= 10) % 10 + '0');
 223                                                 if (wide==0)  while (tmpb < db+12) *outb++ = *tmpb++;
 224                                                 else
 225                                                         {
 226                                                         wide -= db-tmpb+12;
 227                                                         if (left)  while (wide-- > 0) *outb++ = ' ';
 228                                                         while (tmpb < db+12) *outb++ = *tmpb++;
 229                                                         if (left==0)  while (wide-- > 0) *outb++ = ' ';
 230                                                         }
 231                                                 cont=0; break;
 232
 233                         case 's':       tmpb = va_arg(ap, char *);
 234                                                 if (wide==0)  { while (*outb++ = *tmpb++);  --outb; }
 235                                                 else
 236                                                         {
 237                                                         n = wide - strlen(tmpb);
 238                                                         if (left)  while (n-- > 0) *outb++ = ' ';
 239                                                         while (*outb++ = *tmpb++);  --outb;
 240                                                         if (left==0)  while (n-- > 0) *outb++ = ' ';
 241                                                         }
 242                                                 cont=0; break;
 243
 244                         case 'c':       *outb++ = va_arg(ap, int);      cont=0;  break;
 245
 246                         case '0':
 247                         case '1':
 248                         case '2':
 249                         case '3':
 250                         case '4':
 251                         case '5':
 252                         case '6':
 253                         case '7':
 254                         case '8':
 255                         case '9':       wide = 10*wide + *fmt - '0';    break;
 256
 257                         case '-':       left = 0;       break;
 258
 259                         default:        *outb++ = *fmt;  cont=0;        break;
 260                         };
 261                 fmt++;
 262                 }
 263         va_end(ap);
 264         }
 265 #endif lint
 266
 267 /*
 268  *      lprint(long-integer)                            send binary integer to output buffer
 269  *              long integer;
 270  *
 271  *              +---------+---------+---------+---------+
 272  *              |       high  |                 |                 |       low   |
 273  *              |  order  |                     |                 |  order      |
 274  *              |   byte  |                     |                 |       byte  |
 275  *              +---------+---------+---------+---------+
 276  *         31  ---  24 23 --- 16 15 ---  8 7  ---   0
 277  *
 278  *      The save order is low order first, to high order (4 bytes total)
 279  *              and is written to be system independent.
 280  *      No checking for output buffer overflow is done, but flushes if needed!
 281  *      Returns nothing of value.
 282  */
 283 lprint(x)
 284         long x;
 285         {
 286         if (lpnt >= lpend) lflush();
 287         *lpnt++ =  255 & x;                     *lpnt++ =  255 & (x>>8);
 288         *lpnt++ =  255 & (x>>16);       *lpnt++ =  255 & (x>>24);
 289         }
 290
 291 /*
 292  *      lwrite(buf,len)                                 write a buffer to the output buffer
 293  *              char *buf;
 294  *              int len;
 295  *
 296  *      Enter with the address and number of bytes to write out
 297  *      Returns nothing of value
 298  */
 299 lwrite(buf,len)
 300     char *buf;
 301     int len;
 302     {
 303         char *str;
 304         int num2;
 305         if (len > 399)  /* don't copy data if can just write it */
 306                 {
 307 #ifdef EXTRA
 308                 c[BYTESOUT] += len;
 309 #endif
 310
 311 #ifndef VT100
 312                 for (str=buf;  len>0; --len)
 313                         lprc(*str++);
 314 #else VT100
 315                 lflush();
 316                 write(lfd,buf,len);
 317 #endif VT100
 318                 }
 319         else while (len)
 320                 {
 321                 if (lpnt >= lpend) lflush();    /* if buffer is full flush it   */
 322                 num2 = lpbuf+BUFBIG-lpnt;       /*      # bytes left in output buffer   */
 323                 if (num2 > len) num2=len;
 324                 str = lpnt;  len -= num2;
 325                 while (num2--)  *str++ = *buf++;        /* copy in the bytes */
 326                 lpnt = str;
 327                 }
 328     }
 329
 330 /*
 331  *      long lgetc()                            Read one character from input buffer
 332  *
 333  *  Returns 0 if EOF, otherwise the character
 334  */
 335 long lgetc()
 336     {
 337     int i;
 338     if (ipoint != iepoint)  return(inbuffer[ipoint++]);
 339     if (iepoint!=MAXIBUF)   return(0);
 340     if ((i=read(fd,inbuffer,MAXIBUF))<=0)
 341         {
 342         if (i!=0)  write(1,"error reading from input file\n",30);
 343                 iepoint = ipoint = 0;           return(0);
 344         }
 345     ipoint=1;  iepoint=i;  return(*inbuffer);
 346     }
 347
 348 /*
 349  *      long lrint()                    Read one integer from input buffer
 350  *
 351  *              +---------+---------+---------+---------+
 352  *              |       high  |                 |                 |       low   |
 353  *              |  order  |                     |                 |  order      |
 354  *              |   byte  |                     |                 |       byte  |
 355  *              +---------+---------+---------+---------+
 356  *         31  ---  24 23 --- 16 15 ---  8 7  ---   0
 357  *
 358  *      The save order is low order first, to high order (4 bytes total)
 359  *      Returns the int read
 360  */
 361 long lrint()
 362         {
 363         unsigned long i;
 364         i  = 255 & lgetc();                             i |= (255 & lgetc()) << 8;
 365         i |= (255 & lgetc()) << 16;             i |= (255 & lgetc()) << 24;
 366         return(i);
 367         }
 368
 369 /*
 370  *      lrfill(address,number)                  put input bytes into a buffer
 371  *              char *address;
 372  *              int number;
 373  *
 374  *      Reads "number" bytes into the buffer pointed to by "address".
 375  *      Returns nothing of value
 376  */
 377 lrfill(adr,num)
 378         char *adr;
 379         int num;
 380         {
 381         char *pnt;
 382         int num2;
 383         while (num)
 384                 {
 385                 if (iepoint == ipoint)
 386                         {
 387                         if (num>5) /* fast way */
 388                                 {
 389                                 if (read(fd,adr,num) != num)
 390                                         write(2,"error reading from input file\n",30);
 391                                 num=0;
 392                                 }
 393                         else { *adr++ = lgetc();  --num; }
 394                         }
 395                 else
 396                         {
 397                         num2 = iepoint-ipoint;  /*      # of bytes left in the buffer   */
 398                         if (num2 > num) num2=num;
 399                         pnt = inbuffer+ipoint;  num -= num2;  ipoint += num2;
 400                         while (num2--)  *adr++ = *pnt++;
 401                         }
 402                 }
 403         }
 404
 405 /*
 406  *      char *lgetw()                   Get a whitespace ended word from input
 407  *
 408  *      Returns pointer to a buffer that contains word.  If EOF, returns a NULL
 409  */
 410 char *lgetw()
 411         {
 412         char *lgp,cc;
 413         int n=LINBUFSIZE,quote=0;
 414         lgp = lgetwbuf;
 415         do cc=lgetc();  while ((cc <= 32) && (cc > NULL));  /* eat whitespace */
 416         for ( ; ; --n,cc=lgetc())
 417                 {
 418                 if ((cc==NULL) && (lgp==lgetwbuf))  return(NULL);       /* EOF */
 419                 if ((n<=1) || ((cc<=32) && (quote==0))) { *lgp=NULL; return(lgetwbuf); }
 420                 if (cc != '"') *lgp++ = cc;   else quote ^= 1;
 421                 }
 422         }
 423
 424 /*
 425  *      char *lgetl()           Function to read in a line ended by newline or EOF
 426  *
 427  *      Returns pointer to a buffer that contains the line.  If EOF, returns NULL
 428  */
 429 char *lgetl()
 430         {
 431         int i=LINBUFSIZE,ch;
 432         char *str=lgetwbuf;
 433         for ( ; ; --i)
 434                 {
 435                 if ((*str++ = ch = lgetc()) == NULL)
 436                         {
 437                         if (str == lgetwbuf+1)  return(NULL); /* EOF */
 438                 ot:     *str = NULL;    return(lgetwbuf);       /* line ended by EOF */
 439                         }
 440                 if ((ch=='\n') || (i<=1))  goto ot; /* line ended by \n */
 441                 }
 442         }
 443
 444 /*
 445  *      lcreat(filename)                        Create a new file for write
 446  *              char *filename;
 447  *
 448  *      lcreat((char*)0); means to the terminal
 449  *      Returns -1 if error, otherwise the file descriptor opened.
 450  */
 451 lcreat(str)
 452         char *str;
 453         {
 454         lpnt = lpbuf;   lpend = lpbuf+BUFBIG;
 455         if (str==NULL) return(lfd=1);
 456         if ((lfd=creat(str,0644)) < 0)
 457                 {
 458                 lfd=1; lprintf("error creating file <%s>\n",str); lflush(); return(-1);
 459                 }
 460         return(lfd);
 461         }
 462
 463 /*
 464  *      lopen(filename)                 Open a file for read
 465  *              char *filename;
 466  *
 467  *      lopen(0) means from the terminal
 468  *      Returns -1 if error, otherwise the file descriptor opened.
 469  */
 470 lopen(str)
 471         char *str;
 472         {
 473         ipoint = iepoint = MAXIBUF;
 474         if (str==NULL) return(fd=0);
 475         if ((fd=open(str,0)) < 0)
 476                 {
 477                 lwclose(); lfd=1; lpnt=lpbuf; return(-1);
 478                 }
 479         return(fd);
 480         }
 481
 482 /*
 483  *      lappend(filename)               Open for append to an existing file
 484  *              char *filename;
 485  *
 486  *      lappend(0) means to the terminal
 487  *      Returns -1 if error, otherwise the file descriptor opened.
 488  */
 489 lappend(str)
 490         char *str;
 491         {
 492         lpnt = lpbuf;   lpend = lpbuf+BUFBIG;
 493         if (str==NULL) return(lfd=1);
 494         if ((lfd=open(str,2)) < 0)
 495                 {
 496                 lfd=1; return(-1);
 497                 }
 498         lseek(lfd,0,2); /* seek to end of file */
 499         return(lfd);
 500         }
 501
 502 /*
 503  *      lrclose()                                               close the input file
 504  *
 505  *      Returns nothing of value.
 506  */
 507 lrclose()
 508         {
 509         if (fd > 0) close(fd);
 510         }
 511
 512 /*
 513  *      lwclose()                                               close output file flushing if needed
 514  *
 515  *      Returns nothing of value.
 516  */
 517 lwclose()
 518         {
 519         lflush();       if (lfd > 2) close(lfd);
 520         }
 521
 522 /*
 523  *      lprcat(string)                                  append a string to the output buffer
 524  *                                                                  avoids calls to lprintf (time consuming)
 525  */
 526 lprcat(str)
 527     char *str;
 528     {
 529         char *str2;
 530         if (lpnt >= lpend) lflush();
 531         str2 = lpnt;
 532         while (*str2++ = *str++);
 533         lpnt = str2 - 1;
 534     }
 535
 536 #ifdef VT100
 537 /*
 538  *      cursor(x,y)             Subroutine to set the cursor position
 539  *
 540  *      x and y are the cursor coordinates, and lpbuff is the output buffer where
 541  *      escape sequence will be placed.
 542  */
 543 static char *y_num[]= { "\33[","\33[","\33[2","\33[3","\33[4","\33[5","\33[6",
 544         "\33[7","\33[8","\33[9","\33[10","\33[11","\33[12","\33[13","\33[14",
 545         "\33[15","\33[16","\33[17","\33[18","\33[19","\33[20","\33[21","\33[22",
 546         "\33[23","\33[24" };
 547
 548 static char *x_num[]= { "H","H",";2H",";3H",";4H",";5H",";6H",";7H",";8H",";9H",
 549         ";10H",";11H",";12H",";13H",";14H",";15H",";16H",";17H",";18H",";19H",
 550         ";20H",";21H",";22H",";23H",";24H",";25H",";26H",";27H",";28H",";29H",
 551         ";30H",";31H",";32H",";33H",";34H",";35H",";36H",";37H",";38H",";39H",
 552         ";40H",";41H",";42H",";43H",";44H",";45H",";46H",";47H",";48H",";49H",
 553         ";50H",";51H",";52H",";53H",";54H",";55H",";56H",";57H",";58H",";59H",
 554         ";60H",";61H",";62H",";63H",";64H",";65H",";66H",";67H",";68H",";69H",
 555         ";70H",";71H",";72H",";73H",";74H",";75H",";76H",";77H",";78H",";79H",
 556         ";80H" };
 557
 558 cursor(x,y)
 559         int x,y;
 560         {
 561         char *p;
 562         if (lpnt >= lpend) lflush();
 563
 564         p = y_num[y];   /* get the string to print */
 565         while (*p) *lpnt++ = *p++;      /* print the string */
 566
 567         p = x_num[x];   /* get the string to print */
 568         while (*p) *lpnt++ = *p++;      /* print the string */
 569         }
 570 #else VT100
 571 /*
 572  * cursor(x,y)    Put cursor at specified coordinates staring at [1,1] (termcap)
 573  */
 574 cursor (x,y)
 575         int x,y;
 576         {
 577         if (lpnt >= lpend) lflush ();
 578
 579         *lpnt++ = CURSOR;               *lpnt++ = x;            *lpnt++ = y;
 580         }
 581 #endif VT100
 582
 583 /*
 584  *      Routine to position cursor at beginning of 24th line
 585  */
 586 cursors()
 587         {
 588         cursor(1,24);
 589         }
 590
 591 #ifndef VT100
 592 /*
 593  * Warning: ringing the bell is control code 7. Don't use in defines.
 594  * Don't change the order of these defines.
 595  * Also used in helpfiles. Codes used in helpfiles should be \E[1 to \E[7 with
 596  * obvious meanings.
 597  */
 598
 599 static char cap[256];
 600 char *CM, *CE, *CD, *CL, *SO, *SE, *AL, *DL;/* Termcap capabilities */
 601 static char *outbuf=0;  /* translated output buffer */
 602
 603 int putchar ();
 604
 605 /*
 606  * init_term()          Terminal initialization -- setup termcap info
 607  */
 608 init_term()
 609         {
 610         char termbuf[1024];
 611         char *capptr = cap+10;
 612         char *term;
 613         struct sgttyb tt;
 614
 615         switch (tgetent(termbuf, term = getenv("TERM")))
 616                 {
 617                 case -1:
 618                         write(2, "Cannot open termcap file.\n", 26); exit(1);
 619                 case 0:
 620                         write(2, "Cannot find entry of ", 21);
 621                         write(2, term, strlen (term));
 622                         write(2, " in termcap\n", 12);
 623                         exit(1);
 624                 };
 625
 626         if (gtty(0, &tt) == 0)
 627                 /* ospeed = tt.sg_ospeed */ ;
 628
 629         CM = tgetstr("cm", &capptr);  /* Cursor motion */
 630         CE = tgetstr("ce", &capptr);  /* Clear to eoln */
 631         CL = tgetstr("cl", &capptr);  /* Clear screen */
 632
 633 /* OPTIONAL */
 634         AL = tgetstr("al", &capptr);  /* Insert line */
 635         DL = tgetstr("dl", &capptr);  /* Delete line */
 636         SO = tgetstr("so", &capptr);  /* Begin standout mode */
 637         SE = tgetstr("se", &capptr);  /* End standout mode */
 638         CD = tgetstr("cd", &capptr);  /* Clear to end of display */
 639
 640         if (!CM)        /* can't find cursor motion entry */
 641                 {
 642                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 643                 write(2, ", I can't find the cursor motion entry in termcap\n",50);
 644                 exit(1);
 645                 }
 646         if (!CE)        /* can't find clear to end of line entry */
 647                 {
 648                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 649                 write(2,", I can't find the clear to end of line entry in termcap\n",57);
 650                 exit(1);
 651                 }
 652         if (!CL)        /* can't find clear entire screen entry */
 653                 {
 654                 write(2, "Sorry, for a ",13);           write(2, term, strlen(term));
 655                 write(2, ", I can't find the clear entire screen entry in termcap\n",56);
 656                 exit(1);
 657                 }
 658         if ((outbuf=malloc(BUFBIG+16))==0) /* get memory for decoded output buffer*/
 659                 {
 660                 write(2,"Error malloc'ing memory for decoded output buffer\n",50);
 661                 died(-285);     /* malloc() failure */
 662                 }
 663         }
 664 #endif VT100
 665
 666 /*
 667  * cl_line(x,y)  Clear the whole line indicated by 'y' and leave cursor at [x,y]
 668  */
 669 cl_line(x,y)
 670         int x,y;
 671         {
 672 #ifdef VT100
 673         cursor(x,y);            lprcat("\33[2K");
 674 #else VT100
 675         cursor(1,y);            *lpnt++ = CL_LINE;              cursor(x,y);
 676 #endif VT100
 677         }
 678
 679 /*
 680  * cl_up(x,y) Clear screen from [x,1] to current position. Leave cursor at [x,y]
 681  */
 682 cl_up(x,y)
 683         int x,y;
 684         {
 685 #ifdef VT100
 686         cursor(x,y);  lprcat("\33[1J\33[2K");
 687 #else VT100
 688         int i;
 689         cursor(1,1);
 690         for (i=1; i<=y; i++)   { *lpnt++ = CL_LINE;  *lpnt++ = '\n'; }
 691         cursor(x,y);
 692 #endif VT100
 693         }
 694
 695 /*
 696  * cl_dn(x,y)   Clear screen from [1,y] to end of display. Leave cursor at [x,y]
 697  */
 698 cl_dn(x,y)
 699         int x,y;
 700         {
 701 #ifdef VT100
 702         cursor(x,y); lprcat("\33[J\33[2K");
 703 #else VT100
 704         int i;
 705         cursor(1,y);
 706         if (!CD)
 707                 {
 708                 *lpnt++ = CL_LINE;
 709                 for (i=y; i<=24; i++) { *lpnt++ = CL_LINE;  if (i!=24) *lpnt++ = '\n'; }
 710                 cursor(x,y);
 711                 }
 712         else
 713                 *lpnt++ = CL_DOWN;
 714         cursor(x,y);
 715 #endif VT100
 716         }
 717
 718 /*
 719  * standout(str)        Print the argument string in inverse video (standout mode).
 720  */
 721 standout(str)
 722         char *str;
 723         {
 724 #ifdef VT100
 725         setbold();
 726         while (*str)
 727                 *lpnt++ = *str++;
 728         resetbold();
 729 #else VT100
 730         *lpnt++ = ST_START;
 731         while (*str)
 732                 *lpnt++ = *str++;
 733         *lpnt++ = ST_END;
 734 #endif VT100
 735         }
 736
 737 /*
 738  * set_score_output()   Called when output should be literally printed.
 739  */
 740 set_score_output()
 741         {
 742         enable_scroll = -1;
 743         }
 744
 745 /*
 746  *      lflush()                                                Flush the output buffer
 747  *
 748  *      Returns nothing of value.
 749  *      for termcap version: Flush output in output buffer according to output
 750  *                                                      status as indicated by `enable_scroll'
 751  */
 752 #ifndef VT100
 753 static int scrline=18; /* line # for wraparound instead of scrolling if no DL */
 754 lflush ()
 755         {
 756         int lpoint;
 757         char *str;
 758         static int curx = 0;
 759         static int cury = 0;
 760
 761         if ((lpoint = lpnt - lpbuf) > 0)
 762                 {
 763 #ifdef EXTRA
 764                 c[BYTESOUT] += lpoint;
 765 #endif
 766                 if (enable_scroll <= -1)
 767                         {
 768                         flush_buf();
 769                 if (write(lfd,lpbuf,lpoint) != lpoint)
 770                                 write(2,"error writing to output file\n",29);
 771                         lpnt = lpbuf;   /* point back to beginning of buffer */
 772                         return;
 773                         }
 774                 for (str = lpbuf; str < lpnt; str++)
 775                         {
 776                         if (*str>=32)   { putchar (*str); curx++; }
 777                         else switch (*str)
 778                                 {
 779                                 case CLEAR:             tputs (CL, 0, putchar);         curx = cury = 0;
 780                                                                 break;
 781
 782                                 case CL_LINE:   tputs (CE, 0, putchar);
 783                                                                 break;
 784
 785                                 case CL_DOWN:   tputs (CD, 0, putchar);
 786                                                                 break;
 787
 788                                 case ST_START:  tputs (SO, 0, putchar);
 789                                                                 break;
 790
 791                                 case ST_END:    tputs (SE, 0, putchar);
 792                                                                 break;
 793
 794                                 case CURSOR:    curx = *++str - 1;              cury = *++str - 1;
 795                                                                 tputs (tgoto (CM, curx, cury), 0, putchar);
 796                                                                 break;
 797
 798                                 case '\n':              if ((cury == 23) && enable_scroll)
 799                                                                   {
 800                                                                   if (!DL || !AL) /* wraparound or scroll? */
 801                                                                         {
 802                                                                         if (++scrline > 23) scrline=19;
 803
 804                                                                         if (++scrline > 23) scrline=19;
 805                                                                         tputs (tgoto (CM, 0, scrline), 0, putchar);
 806                                                                         tputs (CE, 0, putchar);
 807
 808                                                                         if (--scrline < 19) scrline=23;
 809                                                                         tputs (tgoto (CM, 0, scrline), 0, putchar);
 810                                                                         tputs (CE, 0, putchar);
 811                                                                         }
 812                                                                   else
 813                                                                         {
 814                                                                         tputs (tgoto (CM, 0, 19), 0, putchar);
 815                                                                         tputs (DL, 0, putchar);
 816                                                                         tputs (tgoto (CM, 0, 23), 0, putchar);
 817                                                                 /*      tputs (AL, 0, putchar); */
 818                                                                         }
 819                                                                   }
 820                                                                 else
 821                                                                   {
 822                                                                   putchar ('\n');               cury++;
 823                                                                   }
 824                                                                 curx = 0;
 825                                                                 break;
 826
 827                                 default:                putchar (*str); curx++;
 828                                 };
 829                         }
 830                 }
 831         lpnt = lpbuf;
 832         flush_buf();    /* flush real output buffer now */
 833         }
 834 #else VT100
 835 /*
 836  *      lflush()                                                flush the output buffer
 837  *
 838  *      Returns nothing of value.
 839  */
 840 lflush()
 841     {
 842         int lpoint;
 843         if ((lpoint = lpnt - lpbuf) > 0)
 844         {
 845 #ifdef EXTRA
 846                 c[BYTESOUT] += lpoint;
 847 #endif
 848         if (write(lfd,lpbuf,lpoint) != lpoint)
 849                         write(2,"error writing to output file\n",29);
 850         }
 851         lpnt = lpbuf;   /* point back to beginning of buffer */
 852     }
 853 #endif VT100
 854
 855 #ifndef VT100
 856 static int pindex=0;
 857 /*
 858  * putchar(ch)          Print one character in decoded output buffer.
 859  */
 860 int putchar(c)
 861 int c;
 862         {
 863         outbuf[pindex++] = c;
 864         if (pindex >= BUFBIG)  flush_buf();
 865         }
 866
 867 /*
 868  * flush_buf()                  Flush buffer with decoded output.
 869  */
 870 flush_buf()
 871         {
 872         if (pindex) write(lfd, outbuf, pindex);
 873         pindex = 0;
 874         }
 875
 876 /*
 877  *      char *tmcapcnv(sd,ss)  Routine to convert VT100 escapes to termcap format
 878  *
 879  *      Processes only the \33[#m sequence (converts . files for termcap use
 880  */
 881 char *tmcapcnv(sd,ss)
 882         char *sd,*ss;
 883         {
 884         int tmstate=0;  /* 0=normal, 1=\33 2=[ 3=# */
 885         char tmdigit=0; /* the # in \33[#m */
 886         while (*ss)
 887                 {
 888                 switch(tmstate)
 889                         {
 890                         case 0: if (*ss=='\33')  { tmstate++; break; }
 891                           ign:  *sd++ = *ss;
 892                           ign2: tmstate = 0;
 893                                         break;
 894                         case 1: if (*ss!='[') goto ign;
 895                                         tmstate++;
 896                                         break;
 897                         case 2: if (isdigit(*ss)) { tmdigit= *ss-'0'; tmstate++; break; }
 898                                         if (*ss == 'm') { *sd++ = ST_END; goto ign2; }
 899                                         goto ign;
 900                         case 3: if (*ss == 'm')
 901                                                 {
 902                                                 if (tmdigit) *sd++ = ST_START;
 903                                                         else *sd++ = ST_END;
 904                                                 goto ign2;
 905                                                 }
 906                         default: goto ign;
 907                         };
 908                 ss++;
 909                 }
 910         *sd=0; /* NULL terminator */
 911         return(sd);
 912         }
 913 #endif VT100
 914
 915 /*
 916  *      beep()          Routine to emit a beep if enabled (see no-beep in .larnopts)
 917  */
 918 beep()
 919         {
 920         if (!nobeep) *lpnt++ = '\7';
 921         }