larn/io.c

   1 /*      $NetBSD: io.c,v 1.27 2012/06/19 05:30:43 dholland Exp $ */
   2
   3 /*
   4  * io.c                  Larn is copyrighted 1986 by Noah Morgan.
   5  *
   6  * Below are the functions in this file:
   7  *
   8  * setupvt100()         Subroutine to set up terminal in correct mode for game
   9  * clearvt100()         Subroutine to clean up terminal when the game is over
  10  * ttgetch()            Routine to read in one character from the terminal
  11  * scbr()                       Function to set cbreak -echo for the terminal
  12  * sncbr()                      Function to set -cbreak echo for the terminal
  13  * newgame()            Subroutine to save the initial time and seed rnd()
  14  *
  15  * FILE OUTPUT ROUTINES
  16  *
  17  * lprintf(format,args . . .)   printf to the output buffer lprint(integer)
  18  * end binary integer to output buffer lwrite(buf,len)
  19  * rite a buffer to the output buffer lprcat(str)
  20  * ent string to output buffer
  21  *
  22  * FILE OUTPUT MACROS (in header.h)
  23  *
  24  * lprc(character)                              put the character into the output
  25  * buffer
  26  *
  27  * FILE INPUT ROUTINES
  28  *
  29  * long lgetc()                         read one character from input buffer
  30  * long larn_lrint()                    read one integer from input buffer
  31  * lrfill(address,number)               put input bytes into a buffer char
  32  * *lgetw()                             get a whitespace ended word from
  33  * input char *lgetl()                          get a \n or EOF ended line
  34  * from input
  35  *
  36  * FILE OPEN / CLOSE ROUTINES
  37  *
  38  * lcreat(filename)                     create a new file for write
  39  * lopen(filename)                              open a file for read
  40  * lappend(filename)                    open for append to an existing file
  41  * lrclose()                                    close the input file
  42  * lwclose()                                    close output file lflush()
  43  * lush the output buffer
  44  *
  45  * Other Routines
  46  *
  47  * cursor(x,y)                                  position cursor at [x,y]
  48  * cursors()                                    position cursor at [1,24]
  49  * (saves memory) cl_line(x,y)                  Clear line at [1,y] and leave
  50  * cursor at [x,y] cl_up(x,y)                                   Clear screen
  51  * from [x,1] to current line. cl_dn(x,y)
  52  * lear screen from [1,y] to end of display. standout(str)
  53  * rint the string in standout mode. set_score_output()
  54  * alled when output should be literally printed. * ttputch(ch)
  55  * rint one character in decoded output buffer. * flush_buf()
  56  * lush buffer with decoded output. * init_term()
  57  * erminal initialization -- setup termcap info *       char *tmcapcnv(sd,ss)
  58  * outine to convert VT100 \33's to termcap format beep()
  59  * e to emit a beep if enabled (see no-beep in .larnopts)
  60  *
  61  * Note: ** entries are available only in termcap mode.
  62  */
  63 #include <sys/cdefs.h>
  64 #ifndef lint
  65 __RCSID("$NetBSD: io.c,v 1.27 2012/06/19 05:30:43 dholland Exp $");
  66 #endif /* not lint */
  67
  68 #include "header.h"
  69 #include "extern.h"
  70 #include <string.h>
  71 #include <unistd.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <term.h>
  75 #include <fcntl.h>
  76 #include <errno.h>
  77 #include <ctype.h>
  78
  79 #ifdef TERMIO
  80 #include <termio.h>
  81 #define sgttyb termio
  82 #define stty(_a,_b) ioctl(_a,TCSETA,_b)
  83 #define gtty(_a,_b) ioctl(_a,TCGETA,_b)
  84 #endif
  85 #ifdef TERMIOS
  86 #include <termios.h>
  87 #define sgttyb termios
  88 #define stty(_a,_b) tcsetattr(_a,TCSADRAIN,_b)
  89 #define gtty(_a,_b) tcgetattr(_a,_b)
  90 #endif
  91
  92 #if defined(TERMIO) || defined(TERMIOS)
  93 static int      rawflg = 0;
  94 static char     saveeof, saveeol;
  95 #define doraw(_a) \
  96         if(!rawflg) { \
  97                 ++rawflg; \
  98                 saveeof = _a.c_cc[VMIN]; \
  99                 saveeol = _a.c_cc[VTIME]; \
 100         } \
 101         _a.c_cc[VMIN] = 1; \
 102         _a.c_cc[VTIME] = 1; \
 103         _a.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL)
 104 #define unraw(_a) \
 105         _a.c_cc[VMIN] = saveeof; \
 106         _a.c_cc[VTIME] = saveeol; \
 107         _a.c_lflag |= ICANON|ECHO|ECHOE|ECHOK|ECHONL
 108
 109 #else   /* not TERMIO or TERMIOS */
 110
 111 #ifndef BSD
 112 #define CBREAK RAW              /* V7 has no CBREAK */
 113 #endif
 114
 115 #define doraw(_a) (_a.sg_flags |= CBREAK,_a.sg_flags &= ~ECHO)
 116 #define unraw(_a) (_a.sg_flags &= ~CBREAK,_a.sg_flags |= ECHO)
 117 #include <sgtty.h>
 118 #endif  /* not TERMIO or TERMIOS */
 119
 120 #ifndef NOVARARGS       /* if we have varargs */
 121 #include <stdarg.h>
 122 #else   /* NOVARARGS */ /* if we don't have varargs */
 123 typedef char   *va_list;
 124 #define va_dcl int va_alist;
 125 #define va_start(plist) plist = (char *) &va_alist
 126 #define va_end(plist)
 127 #define va_arg(plist,mode) ((mode *)(plist += sizeof(mode)))[-1]
 128 #endif  /* NOVARARGS */
 129
 130 static int ttputch(int ch);
 131 static void flush_buf(void);
 132
 133 #define LINBUFSIZE 128  /* size of the lgetw() and lgetl() buffer */
 134 int             io_outfd; /* output file numbers */
 135 int             io_infd; /* input file numbers */
 136 static struct sgttyb ttx;/* storage for the tty modes */
 137 static int      ipoint = MAXIBUF, iepoint = MAXIBUF;    /* input buffering
 138                                                          * pointers    */
 139 static char     lgetwbuf[LINBUFSIZE];   /* get line (word) buffer */
 140
 141 /*
 142  *      setupvt100() Subroutine to set up terminal in correct mode for game
 143  *
 144  *      Attributes off, clear screen, set scrolling region, set tty mode
 145  */
 146 void
 147 setupvt100(void)
 148 {
 149         clear();
 150         setscroll();
 151         scbr();                 /* system("stty cbreak -echo"); */
 152 }
 153
 154 /*
 155  *      clearvt100()    Subroutine to clean up terminal when the game is over
 156  *
 157  *      Attributes off, clear screen, unset scrolling region, restore tty mode
 158  */
 159 void
 160 clearvt100(void)
 161 {
 162         resetscroll();
 163         clear();
 164         sncbr();                /* system("stty -cbreak echo"); */
 165 }
 166
 167 /*
 168  *      ttgetch()       Routine to read in one character from the terminal
 169  */
 170 int
 171 ttgetch(void)
 172 {
 173         char            byt;
 174 #ifdef EXTRA
 175         c[BYTESIN]++;
 176 #endif
 177         lflush();               /* be sure output buffer is flushed */
 178         read(0, &byt, 1);       /* get byte from terminal */
 179         return (byt);
 180 }
 181
 182 /*
 183  *      scbr()          Function to set cbreak -echo for the terminal
 184  *
 185  *      like: system("stty cbreak -echo")
 186  */
 187 void
 188 scbr(void)
 189 {
 190         gtty(0, &ttx);
 191         doraw(ttx);
 192         stty(0, &ttx);
 193 }
 194
 195 /*
 196  *      sncbr()         Function to set -cbreak echo for the terminal
 197  *
 198  *      like: system("stty -cbreak echo")
 199  */
 200 void
 201 sncbr(void)
 202 {
 203         gtty(0, &ttx);
 204         unraw(ttx);
 205         stty(0, &ttx);
 206 }
 207
 208 /*
 209  *      newgame()       Subroutine to save the initial time and seed rnd()
 210  */
 211 void
 212 newgame(void)
 213 {
 214         long  *p, *pe;
 215         for (p = c, pe = c + 100; p < pe; *p++ = 0);
 216         time(&initialtime);
 217         seedrand(initialtime);
 218         srandom(initialtime);
 219         lcreat((char *) 0);     /* open buffering for output to terminal */
 220 }
 221
 222 /*
 223  *      lprintf(format,args . . .)              printf to the output buffer
 224  *              char *format;
 225  *              ??? args . . .
 226  *
 227  *      Enter with the format string in "format", as per printf() usage
 228  *              and any needed arguments following it
 229  *      Note: lprintf() only supports %s, %c and %d, with width modifier and left
 230  *              or right justification.
 231  *      No correct checking for output buffer overflow is done, but flushes
 232  *              are done beforehand if needed.
 233  *      Returns nothing of value.
 234  */
 235 void
 236 lprintf(const char *fmt, ...)
 237 {
 238         va_list ap;
 239         char buf[BUFBIG/2];
 240
 241         va_start(ap, fmt);
 242         vsnprintf(buf, sizeof(buf), fmt, ap);
 243         va_end(ap);
 244
 245         if (lpnt >= lpend)
 246                 lflush();
 247
 248         lprcat(buf);
 249 }
 250
 251 /*
 252  *      lprint(long-integer)    send binary integer to output buffer
 253  *              long integer;
 254  *
 255  *              +---------+---------+---------+---------+
 256  *              |   high  |         |         |   low   |
 257  *              |  order  |         |         |  order  |
 258  *              |   byte  |         |         |   byte  |
 259  *              +---------+---------+---------+---------+
 260  *              31  ---  24 23 --- 16 15 ---  8 7  ---   0
 261  *
 262  *      The save order is low order first, to high order (4 bytes total)
 263  *      and is written to be system independent.
 264  *      No checking for output buffer overflow is done, but flushes if needed!
 265  *      Returns nothing of value.
 266  */
 267 void
 268 lprint(long x)
 269 {
 270         if (lpnt >= lpend)
 271                 lflush();
 272         *lpnt++ = 255 & x;
 273         *lpnt++ = 255 & (x >> 8);
 274         *lpnt++ = 255 & (x >> 16);
 275         *lpnt++ = 255 & (x >> 24);
 276 }
 277
 278 /*
 279  *      lwrite(buf,len)         write a buffer to the output buffer
 280  *              char *buf;
 281  *              int len;
 282  *
 283  *      Enter with the address and number of bytes to write out
 284  *      Returns nothing of value
 285  */
 286 void
 287 lwrite(char *buf, int len)
 288 {
 289         char *s;
 290         u_char *t;
 291         int num2;
 292
 293         if (len > 399) {        /* don't copy data if can just write it */
 294 #ifdef EXTRA
 295                 c[BYTESOUT] += len;
 296 #endif
 297
 298 #ifndef VT100
 299                 for (s = buf; len > 0; --len)
 300                         lprc(*s++);
 301 #else   /* VT100 */
 302                 lflush();
 303                 write(io_outfd, buf, len);
 304 #endif  /* VT100 */
 305         } else
 306                 while (len) {
 307                         if (lpnt >= lpend)
 308                                 lflush();       /* if buffer is full flush it    */
 309                         num2 = lpbuf + BUFBIG - lpnt;   /* # bytes left in
 310                                                          * output buffer         */
 311                         if (num2 > len)
 312                                 num2 = len;
 313                         t = lpnt;
 314                         len -= num2;
 315                         while (num2--)
 316                                 *t++ = *buf++;  /* copy in the bytes */
 317                         lpnt = t;
 318                 }
 319 }
 320
 321 /*
 322  *      long lgetc()    Read one character from input buffer
 323  *
 324  *  Returns 0 if EOF, otherwise the character
 325  */
 326 long
 327 lgetc(void)
 328 {
 329         int    i;
 330         if (ipoint != iepoint)
 331                 return (inbuffer[ipoint++]);
 332         if (iepoint != MAXIBUF)
 333                 return (0);
 334         if ((i = read(io_infd, inbuffer, MAXIBUF)) <= 0) {
 335                 if (i != 0)
 336                         write(1, "error reading from input file\n", 30);
 337                 iepoint = ipoint = 0;
 338                 return (0);
 339         }
 340         ipoint = 1;
 341         iepoint = i;
 342         return (*inbuffer);
 343 }
 344
 345 /*
 346  *      long lrint()    Read one integer from input buffer
 347  *
 348  *              +---------+---------+---------+---------+
 349  *              |   high  |         |         |   low   |
 350  *              |  order  |         |         |  order  |
 351  *              |   byte  |         |         |   byte  |
 352  *              +---------+---------+---------+---------+
 353  *             31  ---  24 23 --- 16 15 ---  8 7  ---   0
 354  *
 355  *      The save order is low order first, to high order (4 bytes total)
 356  *      Returns the int read
 357  */
 358 long
 359 larn_lrint(void)
 360 {
 361         unsigned long i;
 362         i = 255 & lgetc();
 363         i |= (255 & lgetc()) << 8;
 364         i |= (255 & lgetc()) << 16;
 365         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 void
 378 lrfill(char *adr, int num)
 379 {
 380         u_char  *pnt;
 381         int    num2;
 382
 383         while (num) {
 384                 if (iepoint == ipoint) {
 385                         if (num > 5) {  /* fast way */
 386                                 if (read(io_infd, adr, num) != num)
 387                                         write(2, "error reading from input file\n", 30);
 388                                 num = 0;
 389                         } else {
 390                                 *adr++ = lgetc();
 391                                 --num;
 392                         }
 393                 } else {
 394                         num2 = iepoint - ipoint;        /* # of bytes left in
 395                                                          * the buffer    */
 396                         if (num2 > num)
 397                                 num2 = num;
 398                         pnt = inbuffer + ipoint;
 399                         num -= num2;
 400                         ipoint += num2;
 401                         while (num2--)
 402                                 *adr++ = *pnt++;
 403                 }
 404         }
 405 }
 406
 407 /*
 408  *      char *lgetw()                   Get a whitespace ended word from input
 409  *
 410  *      Returns pointer to a buffer that contains word.  If EOF, returns a NULL
 411  */
 412 char *
 413 lgetw(void)
 414 {
 415         char  *lgp, cc;
 416         int    n = LINBUFSIZE, quote = 0;
 417         lgp = lgetwbuf;
 418         do
 419                 cc = lgetc();
 420         while ((cc <= 32) && (cc > '\0'));      /* eat whitespace */
 421         for (;; --n, cc = lgetc()) {
 422                 if ((cc == '\0') && (lgp == lgetwbuf))
 423                         return (NULL);  /* EOF */
 424                 if ((n <= 1) || ((cc <= 32) && (quote == 0))) {
 425                         *lgp = '\0';
 426                         return (lgetwbuf);
 427                 }
 428                 if (cc != '"')
 429                         *lgp++ = cc;
 430                 else
 431                         quote ^= 1;
 432         }
 433 }
 434
 435 /*
 436  *      char *lgetl()   Function to read in a line ended by newline or EOF
 437  *
 438  * Returns pointer to a buffer that contains the line.  If EOF, returns NULL
 439  */
 440 char *
 441 lgetl(void)
 442 {
 443         int    i = LINBUFSIZE, ch;
 444         char  *str = lgetwbuf;
 445         for (;; --i) {
 446                 if ((*str++ = ch = lgetc()) == '\0') {
 447                         if (str == lgetwbuf + 1)
 448                                 return (NULL);  /* EOF */
 449         ot:             *str = '\0';
 450                         return (lgetwbuf);      /* line ended by EOF */
 451                 }
 452                 if ((ch == '\n') || (i <= 1))
 453                         goto ot;/* line ended by \n */
 454         }
 455 }
 456
 457 /*
 458  *      lcreat(filename)                        Create a new file for write
 459  *              char *filename;
 460  *
 461  *      lcreat((char*)0); means to the terminal
 462  *      Returns -1 if error, otherwise the file descriptor opened.
 463  */
 464 int
 465 lcreat(char *str)
 466 {
 467         lflush();
 468         lpnt = lpbuf;
 469         lpend = lpbuf + BUFBIG;
 470         if (str == NULL)
 471                 return (io_outfd = 1);
 472         if ((io_outfd = creat(str, 0644)) < 0) {
 473                 io_outfd = 1;
 474                 lprintf("error creating file <%s>: %s\n", str,
 475                         strerror(errno));
 476                 lflush();
 477                 return (-1);
 478         }
 479         return (io_outfd);
 480 }
 481
 482 /*
 483  *      lopen(filename)                 Open a file for read
 484  *              char *filename;
 485  *
 486  *      lopen(0) means from the terminal
 487  *      Returns -1 if error, otherwise the file descriptor opened.
 488  */
 489 int
 490 lopen(char *str)
 491 {
 492         ipoint = iepoint = MAXIBUF;
 493         if (str == NULL)
 494                 return (io_infd = 0);
 495         if ((io_infd = open(str, O_RDONLY)) < 0) {
 496                 lwclose();
 497                 io_outfd = 1;
 498                 lpnt = lpbuf;
 499                 return (-1);
 500         }
 501         return (io_infd);
 502 }
 503
 504 /*
 505  *      lappend(filename)               Open for append to an existing file
 506  *              char *filename;
 507  *
 508  *      lappend(0) means to the terminal
 509  *      Returns -1 if error, otherwise the file descriptor opened.
 510  */
 511 int
 512 lappend(char *str)
 513 {
 514         lpnt = lpbuf;
 515         lpend = lpbuf + BUFBIG;
 516         if (str == NULL)
 517                 return (io_outfd = 1);
 518         if ((io_outfd = open(str, 2)) < 0) {
 519                 io_outfd = 1;
 520                 return (-1);
 521         }
 522         lseek(io_outfd, 0, SEEK_END);   /* seek to end of file */
 523         return (io_outfd);
 524 }
 525
 526 /*
 527  *      lrclose() close the input file
 528  *
 529  *      Returns nothing of value.
 530  */
 531 void
 532 lrclose(void)
 533 {
 534         if (io_infd > 0) {
 535                 close(io_infd);
 536                 io_infd = 0;
 537         }
 538 }
 539
 540 /*
 541  *      lwclose() close output file flushing if needed
 542  *
 543  *      Returns nothing of value.
 544  */
 545 void
 546 lwclose(void)
 547 {
 548         lflush();
 549         if (io_outfd > 2) {
 550                 close(io_outfd);
 551                 io_outfd = 1;
 552         }
 553 }
 554
 555 /*
 556  *      lprcat(string)  append a string to the output buffer
 557  *                              avoids calls to lprintf (time consuming)
 558  */
 559 void
 560 lprcat(const char *str)
 561 {
 562         u_char  *str2;
 563         if (lpnt >= lpend)
 564                 lflush();
 565         str2 = lpnt;
 566         while ((*str2++ = *str++) != '\0')
 567                 continue;
 568         lpnt = str2 - 1;
 569 }
 570
 571 #ifdef VT100
 572 /*
 573  *      cursor(x,y)             Subroutine to set the cursor position
 574  *
 575  *      x and y are the cursor coordinates, and lpbuff is the output buffer where
 576  *      escape sequence will be placed.
 577  */
 578 static char    *y_num[] = {
 579 "\33[", "\33[", "\33[2", "\33[3", "\33[4", "\33[5", "\33[6",
 580 "\33[7", "\33[8", "\33[9", "\33[10", "\33[11", "\33[12", "\33[13", "\33[14",
 581 "\33[15", "\33[16", "\33[17", "\33[18", "\33[19", "\33[20", "\33[21", "\33[22",
 582 "\33[23", "\33[24"};
 583
 584 static char    *x_num[] = {
 585 "H", "H", ";2H", ";3H", ";4H", ";5H", ";6H", ";7H", ";8H", ";9H",
 586 ";10H", ";11H", ";12H", ";13H", ";14H", ";15H", ";16H", ";17H", ";18H", ";19H",
 587 ";20H", ";21H", ";22H", ";23H", ";24H", ";25H", ";26H", ";27H", ";28H", ";29H",
 588 ";30H", ";31H", ";32H", ";33H", ";34H", ";35H", ";36H", ";37H", ";38H", ";39H",
 589 ";40H", ";41H", ";42H", ";43H", ";44H", ";45H", ";46H", ";47H", ";48H", ";49H",
 590 ";50H", ";51H", ";52H", ";53H", ";54H", ";55H", ";56H", ";57H", ";58H", ";59H",
 591 ";60H", ";61H", ";62H", ";63H", ";64H", ";65H", ";66H", ";67H", ";68H", ";69H",
 592 ";70H", ";71H", ";72H", ";73H", ";74H", ";75H", ";76H", ";77H", ";78H", ";79H",
 593 ";80H"};
 594
 595 void
 596 cursor(x, y)
 597         int             x, y;
 598 {
 599         char  *p;
 600         if (lpnt >= lpend)
 601                 lflush();
 602
 603         p = y_num[y];           /* get the string to print */
 604         while (*p)
 605                 *lpnt++ = *p++; /* print the string */
 606
 607         p = x_num[x];           /* get the string to print */
 608         while (*p)
 609                 *lpnt++ = *p++; /* print the string */
 610 }
 611 #else   /* VT100 */
 612 /*
 613  * cursor(x,y)    Put cursor at specified coordinates staring at [1,1] (termcap)
 614  */
 615 void
 616 cursor(int x, int y)
 617 {
 618         if (lpnt >= lpend)
 619                 lflush();
 620
 621         *lpnt++ = CURSOR;
 622         *lpnt++ = x;
 623         *lpnt++ = y;
 624 }
 625 #endif  /* VT100 */
 626
 627 /*
 628  *      Routine to position cursor at beginning of 24th line
 629  */
 630 void
 631 cursors(void)
 632 {
 633         cursor(1, 24);
 634 }
 635
 636 #ifndef VT100
 637 /*
 638  * Warning: ringing the bell is control code 7. Don't use in defines.
 639  * Don't change the order of these defines.
 640  * Also used in helpfiles. Codes used in helpfiles should be \E[1 to \E[7 with
 641  * obvious meanings.
 642  */
 643
 644 static char    *outbuf = 0;     /* translated output buffer */
 645 /*
 646  * init_term()          Terminal initialization -- setup termcap info
 647  */
 648 void
 649 init_term(void)
 650 {
 651         setupterm(NULL, 0, NULL); /* will exit if invalid term */
 652         if (!cursor_address) {
 653                 fprintf(stderr, "term does not have cursor_address.\n");
 654                 exit(1);
 655         }
 656         if (!clr_eol) {
 657                 fprintf(stderr, "term does not have clr_eol.\n");
 658                 exit(1);
 659         }
 660         if (!clear_screen) {
 661                 fprintf(stderr, "term does not have clear_screen.\n");
 662                 exit(1);
 663         }
 664         if ((outbuf = malloc(BUFBIG + 16)) == 0) {      /* get memory for
 665                                                          * decoded output buffer */
 666             fprintf(stderr, "Error malloc'ing memory for decoded output buffer\n");
 667             died(-285);     /* malloc() failure */
 668         }
 669
 670 }
 671 #endif  /* VT100 */
 672
 673 /*
 674  * cl_line(x,y)  Clear the whole line indicated by 'y' and leave cursor at [x,y]
 675  */
 676 void
 677 cl_line(int x, int y)
 678 {
 679 #ifdef VT100
 680         cursor(x, y);
 681         lprcat("\33[2K");
 682 #else   /* VT100 */
 683         cursor(1, y);
 684         *lpnt++ = CL_LINE;
 685         cursor(x, y);
 686 #endif  /* VT100 */
 687 }
 688
 689 /*
 690  * cl_up(x,y) Clear screen from [x,1] to current position. Leave cursor at [x,y]
 691  */
 692 void
 693 cl_up(int x, int y)
 694 {
 695 #ifdef VT100
 696         cursor(x, y);
 697         lprcat("\33[1J\33[2K");
 698 #else   /* VT100 */
 699         int    i;
 700         cursor(1, 1);
 701         for (i = 1; i <= y; i++) {
 702                 *lpnt++ = CL_LINE;
 703                 *lpnt++ = '\n';
 704         }
 705         cursor(x, y);
 706 #endif  /* VT100 */
 707 }
 708
 709 /*
 710  * cl_dn(x,y)   Clear screen from [1,y] to end of display. Leave cursor at [x,y]
 711  */
 712 void
 713 cl_dn(int x, int y)
 714 {
 715 #ifdef VT100
 716         cursor(x, y);
 717         lprcat("\33[J\33[2K");
 718 #else   /* VT100 */
 719         int    i;
 720         cursor(1, y);
 721         if (!clr_eos) {
 722                 *lpnt++ = CL_LINE;
 723                 for (i = y; i <= 24; i++) {
 724                         *lpnt++ = CL_LINE;
 725                         if (i != 24)
 726                                 *lpnt++ = '\n';
 727                 }
 728                 cursor(x, y);
 729         } else
 730                 *lpnt++ = CL_DOWN;
 731         cursor(x, y);
 732 #endif  /* VT100 */
 733 }
 734
 735 /*
 736  * standout(str)        Print the argument string in inverse video (standout mode).
 737  */
 738 void
 739 standout(const char *str)
 740 {
 741 #ifdef VT100
 742         setbold();
 743         while (*str)
 744                 *lpnt++ = *str++;
 745         resetbold();
 746 #else   /* VT100 */
 747         *lpnt++ = ST_START;
 748         while (*str)
 749                 *lpnt++ = *str++;
 750         *lpnt++ = ST_END;
 751 #endif  /* VT100 */
 752 }
 753
 754 /*
 755  * set_score_output()   Called when output should be literally printed.
 756  */
 757 void
 758 set_score_output(void)
 759 {
 760         enable_scroll = -1;
 761 }
 762
 763 /*
 764  *      lflush()        Flush the output buffer
 765  *
 766  *      Returns nothing of value.
 767  *      for termcap version: Flush output in output buffer according to output
 768  *      status as indicated by `enable_scroll'
 769  */
 770 #ifndef VT100
 771 static int      scrline = 18;   /* line # for wraparound instead of scrolling
 772                                  * if no DL */
 773 void
 774 lflush(void)
 775 {
 776         int    lpoint;
 777         u_char  *str;
 778         static int      curx = 0;
 779         static int      cury = 0;
 780
 781         if ((lpoint = lpnt - lpbuf) > 0) {
 782 #ifdef EXTRA
 783                 c[BYTESOUT] += lpoint;
 784 #endif
 785                 if (enable_scroll <= -1) {
 786                         flush_buf();
 787                         if (write(io_outfd, lpbuf, lpoint) != lpoint)
 788                                 write(2, "error writing to output file\n", 29);
 789                         lpnt = lpbuf;   /* point back to beginning of buffer */
 790                         return;
 791                 }
 792                 for (str = lpbuf; str < lpnt; str++) {
 793                         if (*str >= 32) {
 794                                 ttputch(*str);
 795                                 curx++;
 796                         } else
 797                                 switch (*str) {
 798                                 case CLEAR:
 799                                         tputs(clear_screen, 0, ttputch);
 800                                         curx = cury = 0;
 801                                         break;
 802
 803                                 case CL_LINE:
 804                                         tputs(clr_eol, 0, ttputch);
 805                                         break;
 806
 807                                 case CL_DOWN:
 808                                         tputs(clr_eos, 0, ttputch);
 809                                         break;
 810
 811                                 case ST_START:
 812                                         tputs(enter_standout_mode, 0, ttputch);
 813                                         break;
 814
 815                                 case ST_END:
 816                                         tputs(exit_standout_mode, 0, ttputch);
 817                                         break;
 818
 819                                 case CURSOR:
 820                                         curx = *++str - 1;
 821                                         cury = *++str - 1;
 822                                         tputs(tiparm(cursor_address,
 823                                                     cury, curx), 0, ttputch);
 824                                         break;
 825
 826                                 case '\n':
 827                                         if ((cury == 23) && enable_scroll) {
 828                                                 if (!delete_line ||
 829                                                     !insert_line)
 830                                                 {       /* wraparound or scroll? */
 831                                                         if (++scrline > 23)
 832                                                                 scrline = 19;
 833
 834                                                         if (++scrline > 23)
 835                                                                 scrline = 19;
 836                                                         tputs(tiparm(
 837                                                             cursor_address,
 838                                                             scrline, 0),
 839                                                             0, ttputch);
 840                                                         tputs(clr_eol, 0,
 841                                                             ttputch);
 842
 843                                                         if (--scrline < 19)
 844                                                                 scrline = 23;
 845                                                         tputs(tiparm(
 846                                                             cursor_address,
 847                                                             scrline, 0),
 848                                                             0, ttputch);
 849                                                         tputs(clr_eol, 0,
 850                                                             ttputch);
 851                                                 } else {
 852                                                         tputs(tiparm(
 853                                                             cursor_address,
 854                                                             19, 0),
 855                                                             0, ttputch);
 856                                                         tputs(delete_line, 0,
 857                                                             ttputch);
 858                                                         tputs(tiparm(
 859                                                             cursor_address,
 860                                                             23, 0),
 861                                                             0, ttputch);
 862                                                         /*
 863                                                          * tputs (AL, 0,
 864                                                          * ttputch);
 865                                                          */
 866                                                 }
 867                                         } else {
 868                                                 ttputch('\n');
 869                                                 cury++;
 870                                         }
 871                                         curx = 0;
 872                                         break;
 873
 874                                 default:
 875                                         ttputch(*str);
 876                                         curx++;
 877                                 };
 878                 }
 879         }
 880         lpnt = lpbuf;
 881         flush_buf();            /* flush real output buffer now */
 882 }
 883 #else   /* VT100 */
 884 /*
 885  *      lflush()                flush the output buffer
 886  *
 887  *      Returns nothing of value.
 888  */
 889 void
 890 lflush()
 891 {
 892         int    lpoint;
 893         if ((lpoint = lpnt - lpbuf) > 0) {
 894 #ifdef EXTRA
 895                 c[BYTESOUT] += lpoint;
 896 #endif
 897                 if (write(io_outfd, lpbuf, lpoint) != lpoint)
 898                         write(2, "error writing to output file\n", 29);
 899         }
 900         lpnt = lpbuf;           /* point back to beginning of buffer */
 901 }
 902 #endif  /* VT100 */
 903
 904 #ifndef VT100
 905 static int      vindex = 0;
 906 /*
 907  * ttputch(ch)          Print one character in decoded output buffer.
 908  */
 909 static int
 910 ttputch(int ch)
 911 {
 912         outbuf[vindex++] = ch;
 913         if (vindex >= BUFBIG)
 914                 flush_buf();
 915         return (0);
 916 }
 917
 918 /*
 919  * flush_buf()                  Flush buffer with decoded output.
 920  */
 921 static void
 922 flush_buf(void)
 923 {
 924         if (vindex)
 925                 write(io_outfd, outbuf, vindex);
 926         vindex = 0;
 927 }
 928
 929 /*
 930  *      char *tmcapcnv(sd,ss)  Routine to convert VT100 escapes to termcap
 931  *      format
 932  *      Processes only the \33[#m sequence (converts . files for termcap use
 933  */
 934 char *
 935 tmcapcnv(char *sd, char *ss)
 936 {
 937         int    tmstate = 0;     /* 0=normal, 1=\33 2=[ 3=# */
 938         char            tmdigit = 0;    /* the # in \33[#m */
 939         while (*ss) {
 940                 switch (tmstate) {
 941                 case 0:
 942                         if (*ss == '\33') {
 943                                 tmstate++;
 944                                 break;
 945                         }
 946         ign:            *sd++ = *ss;
 947         ign2:           tmstate = 0;
 948                         break;
 949                 case 1:
 950                         if (*ss != '[')
 951                                 goto ign;
 952                         tmstate++;
 953                         break;
 954                 case 2:
 955                         if (isdigit((u_char)*ss)) {
 956                                 tmdigit = *ss - '0';
 957                                 tmstate++;
 958                                 break;
 959                         }
 960                         if (*ss == 'm') {
 961                                 *sd++ = ST_END;
 962                                 goto ign2;
 963                         }
 964                         goto ign;
 965                 case 3:
 966                         if (*ss == 'm') {
 967                                 if (tmdigit)
 968                                         *sd++ = ST_START;
 969                                 else
 970                                         *sd++ = ST_END;
 971                                 goto ign2;
 972                         }
 973                 default:
 974                         goto ign;
 975                 };
 976                 ss++;
 977         }
 978         *sd = 0;                /* NULL terminator */
 979         return (sd);
 980 }
 981 #endif  /* VT100 */
 982
 983 /*
 984  *      beep()  Routine to emit a beep if enabled (see no-beep in .larnopts)
 985  */
 986 void
 987 beep(void)
 988 {
 989         if (!nobeep)
 990                 *lpnt++ = '\7';
 991 }