larn/io.c

   1 /*      $NetBSD: io.c,v 1.13 2001/11/02 18:27:00 christos 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  * lgetchar()           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 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. * xputchar(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 1.13 2001/11/02 18:27:00 christos Exp $");
  66 #endif /* not lint */
  67
  68 #include "header.h"
  69 #include "extern.h"
  70 #include <string.h>
  71 #include <unistd.h>
  72 #include <stdlib.h>
  73 #include <termcap.h>
  74 #include <fcntl.h>
  75 #include <errno.h>
  76
  77 #ifdef TERMIO
  78 #include <termio.h>
  79 #define sgttyb termio
  80 #define stty(_a,_b) ioctl(_a,TCSETA,_b)
  81 #define gtty(_a,_b) ioctl(_a,TCGETA,_b)
  82 #endif
  83 #ifdef TERMIOS
  84 #include <termios.h>
  85 #define sgttyb termios
  86 #define stty(_a,_b) tcsetattr(_a,TCSADRAIN,_b)
  87 #define gtty(_a,_b) tcgetattr(_a,_b)
  88 #endif
  89
  90 #if defined(TERMIO) || defined(TERMIOS)
  91 static int      rawflg = 0;
  92 static char     saveeof, saveeol;
  93 #define doraw(_a) \
  94         if(!rawflg) { \
  95                 ++rawflg; \
  96                 saveeof = _a.c_cc[VMIN]; \
  97                 saveeol = _a.c_cc[VTIME]; \
  98         } \
  99         _a.c_cc[VMIN] = 1; \
 100         _a.c_cc[VTIME] = 1; \
 101         _a.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL)
 102 #define unraw(_a) \
 103         _a.c_cc[VMIN] = saveeof; \
 104         _a.c_cc[VTIME] = saveeol; \
 105         _a.c_lflag |= ICANON|ECHO|ECHOE|ECHOK|ECHONL
 106
 107 #else   /* not TERMIO or TERMIOS */
 108
 109 #ifndef BSD
 110 #define CBREAK RAW              /* V7 has no CBREAK */
 111 #endif
 112
 113 #define doraw(_a) (_a.sg_flags |= CBREAK,_a.sg_flags &= ~ECHO)
 114 #define unraw(_a) (_a.sg_flags &= ~CBREAK,_a.sg_flags |= ECHO)
 115 #include <sgtty.h>
 116 #endif  /* not TERMIO or TERMIOS */
 117
 118 #ifndef NOVARARGS       /* if we have varargs */
 119 #ifdef __STDC__
 120 #include <stdarg.h>
 121 #else
 122 #include <varargs.h>
 123 #endif
 124 #else   /* NOVARARGS */ /* if we don't have varargs */
 125 typedef char   *va_list;
 126 #define va_dcl int va_alist;
 127 #define va_start(plist) plist = (char *) &va_alist
 128 #define va_end(plist)
 129 #define va_arg(plist,mode) ((mode *)(plist += sizeof(mode)))[-1]
 130 #endif  /* NOVARARGS */
 131
 132 #define LINBUFSIZE 128  /* size of the lgetw() and lgetl() buffer */
 133 int             lfd;    /* output file numbers */
 134 int             fd;     /* input file numbers */
 135 static struct sgttyb ttx;/* storage for the tty modes */
 136 static int      ipoint = MAXIBUF, iepoint = MAXIBUF;    /* input buffering
 137                                                          * pointers    */
 138 static char     lgetwbuf[LINBUFSIZE];   /* get line (word) buffer */
 139
 140 /*
 141  *      setupvt100() Subroutine to set up terminal in correct mode for game
 142  *
 143  *      Attributes off, clear screen, set scrolling region, set tty mode
 144  */
 145 void
 146 setupvt100()
 147 {
 148         clear();
 149         setscroll();
 150         scbr();                 /* system("stty cbreak -echo"); */
 151 }
 152
 153 /*
 154  *      clearvt100()    Subroutine to clean up terminal when the game is over
 155  *
 156  *      Attributes off, clear screen, unset scrolling region, restore tty mode
 157  */
 158 void
 159 clearvt100()
 160 {
 161         resetscroll();
 162         clear();
 163         sncbr();                /* system("stty -cbreak echo"); */
 164 }
 165
 166 /*
 167  *      lgetchar()      Routine to read in one character from the terminal
 168  */
 169 int
 170 lgetchar()
 171 {
 172         char            byt;
 173 #ifdef EXTRA
 174         c[BYTESIN]++;
 175 #endif
 176         lflush();               /* be sure output buffer is flushed */
 177         read(0, &byt, 1);       /* get byte from terminal */
 178         return (byt);
 179 }
 180
 181 /*
 182  *      scbr()          Function to set cbreak -echo for the terminal
 183  *
 184  *      like: system("stty cbreak -echo")
 185  */
 186 void
 187 scbr()
 188 {
 189         gtty(0, &ttx);
 190         doraw(ttx);
 191         stty(0, &ttx);
 192 }
 193
 194 /*
 195  *      sncbr()         Function to set -cbreak echo for the terminal
 196  *
 197  *      like: system("stty -cbreak echo")
 198  */
 199 void
 200 sncbr()
 201 {
 202         gtty(0, &ttx);
 203         unraw(ttx);
 204         stty(0, &ttx);
 205 }
 206
 207 /*
 208  *      newgame()       Subroutine to save the initial time and seed rnd()
 209  */
 210 void
 211 newgame()
 212 {
 213         long  *p, *pe;
 214         for (p = c, pe = c + 100; p < pe; *p++ = 0);
 215         time(&initialtime);
 216         srand(initialtime);
 217         lcreat((char *) 0);     /* open buffering for output to terminal */
 218 }
 219
 220 /*
 221  *      lprintf(format,args . . .)              printf to the output buffer
 222  *              char *format;
 223  *              ??? args . . .
 224  *
 225  *      Enter with the format string in "format", as per printf() usage
 226  *              and any needed arguments following it
 227  *      Note: lprintf() only supports %s, %c and %d, with width modifier and left
 228  *              or right justification.
 229  *      No correct checking for output buffer overflow is done, but flushes
 230  *              are done beforehand if needed.
 231  *      Returns nothing of value.
 232  */
 233 #ifdef lint
 234 /* VARARGS */
 235 lprintf(str)
 236         char           *str;
 237 {
 238         char           *str2;
 239         str2 = str;
 240         str = str2;             /* to make lint happy */
 241 }
 242 /* VARARGS */
 243 sprintf(str)
 244         char           *str;
 245 {
 246         char           *str2;
 247         str2 = str;
 248         str = str2;             /* to make lint happy */
 249 }
 250 #else   /* lint */
 251 /* VARARGS */
 252 #ifdef __STDC__
 253 void lprintf(const char *fmt, ...)
 254 #else
 255 void
 256 lprintf(va_alist)
 257 va_dcl
 258 #endif
 259 {
 260         va_list         ap;     /* pointer for variable argument list */
 261         char  *outb, *tmpb;
 262         long   wide, left, cont, n;     /* data for lprintf      */
 263         char            db[12]; /* %d buffer in lprintf  */
 264 #ifndef __STDC__
 265         char  *fmt;
 266
 267         va_start(ap);           /* initialize the var args pointer */
 268         fmt = va_arg(ap, char *);       /* pointer to format string */
 269 #else
 270         va_start(ap, fmt);
 271 #endif
 272         if (lpnt >= lpend)
 273                 lflush();
 274         outb = lpnt;
 275         for (;;) {
 276                 while (*fmt != '%')
 277                         if (*fmt)
 278                                 *outb++ = *fmt++;
 279                         else {
 280                                 lpnt = outb;
 281                                 va_end(ap);
 282                                 return;
 283                         }
 284                 wide = 0;
 285                 left = 1;
 286                 cont = 1;
 287                 while (cont)
 288                         switch (*(++fmt)) {
 289                         case 'd':
 290                                 n = va_arg(ap, long);
 291                                 if (n < 0) {
 292                                         n = -n;
 293                                         *outb++ = '-';
 294                                         if (wide)
 295                                                 --wide;
 296                                 }
 297                                 tmpb = db + 11;
 298                                 *tmpb = (char) (n % 10 + '0');
 299                                 while (n > 9)
 300                                         *(--tmpb) = (char) ((n /= 10) % 10 + '0');
 301                                 if (wide == 0)
 302                                         while (tmpb < db + 12)
 303                                                 *outb++ = *tmpb++;
 304                                 else {
 305                                         wide -= db - tmpb + 12;
 306                                         if (left)
 307                                                 while (wide-- > 0)
 308                                                         *outb++ = ' ';
 309                                         while (tmpb < db + 12)
 310                                                 *outb++ = *tmpb++;
 311                                         if (left == 0)
 312                                                 while (wide-- > 0)
 313                                                         *outb++ = ' ';
 314                                 }
 315                                 cont = 0;
 316                                 break;
 317
 318                         case 's':
 319                                 tmpb = va_arg(ap, char *);
 320                                 if (wide == 0) {
 321                                         while ((*outb++ = *tmpb++) != '\0')
 322                                                 continue;
 323                                         --outb;
 324                                 } else {
 325                                         n = wide - strlen(tmpb);
 326                                         if (left)
 327                                                 while (n-- > 0)
 328                                                         *outb++ = ' ';
 329                                         while ((*outb++ = *tmpb++) != '\0')
 330                                                 continue;
 331                                         --outb;
 332                                         if (left == 0)
 333                                                 while (n-- > 0)
 334                                                         *outb++ = ' ';
 335                                 }
 336                                 cont = 0;
 337                                 break;
 338
 339                         case 'c':
 340                                 *outb++ = va_arg(ap, int);
 341                                 cont = 0;
 342                                 break;
 343
 344                         case '0':
 345                         case '1':
 346                         case '2':
 347                         case '3':
 348                         case '4':
 349                         case '5':
 350                         case '6':
 351                         case '7':
 352                         case '8':
 353                         case '9':
 354                                 wide = 10 * wide + *fmt - '0';
 355                                 break;
 356
 357                         case '-':
 358                                 left = 0;
 359                                 break;
 360
 361                         default:
 362                                 *outb++ = *fmt;
 363                                 cont = 0;
 364                                 break;
 365                         };
 366                 fmt++;
 367         }
 368         va_end(ap);
 369 }
 370 #endif  /* lint */
 371
 372 /*
 373  *      lprint(long-integer)    send binary integer to output buffer
 374  *              long integer;
 375  *
 376  *              +---------+---------+---------+---------+
 377  *              |   high  |         |         |   low   |
 378  *              |  order  |         |         |  order  |
 379  *              |   byte  |         |         |   byte  |
 380  *              +---------+---------+---------+---------+
 381  *              31  ---  24 23 --- 16 15 ---  8 7  ---   0
 382  *
 383  *      The save order is low order first, to high order (4 bytes total)
 384  *      and is written to be system independent.
 385  *      No checking for output buffer overflow is done, but flushes if needed!
 386  *      Returns nothing of value.
 387  */
 388 void
 389 lprint(x)
 390         long   x;
 391 {
 392         if (lpnt >= lpend)
 393                 lflush();
 394         *lpnt++ = 255 & x;
 395         *lpnt++ = 255 & (x >> 8);
 396         *lpnt++ = 255 & (x >> 16);
 397         *lpnt++ = 255 & (x >> 24);
 398 }
 399
 400 /*
 401  *      lwrite(buf,len)         write a buffer to the output buffer
 402  *              char *buf;
 403  *              int len;
 404  *
 405  *      Enter with the address and number of bytes to write out
 406  *      Returns nothing of value
 407  */
 408 void
 409 lwrite(buf, len)
 410         char  *buf;
 411         int             len;
 412 {
 413         char  *str;
 414         int    num2;
 415         if (len > 399) {        /* don't copy data if can just write it */
 416 #ifdef EXTRA
 417                 c[BYTESOUT] += len;
 418 #endif
 419
 420 #ifndef VT100
 421                 for (str = buf; len > 0; --len)
 422                         lprc(*str++);
 423 #else   /* VT100 */
 424                 lflush();
 425                 write(lfd, buf, len);
 426 #endif  /* VT100 */
 427         } else
 428                 while (len) {
 429                         if (lpnt >= lpend)
 430                                 lflush();       /* if buffer is full flush it    */
 431                         num2 = lpbuf + BUFBIG - lpnt;   /* # bytes left in
 432                                                          * output buffer         */
 433                         if (num2 > len)
 434                                 num2 = len;
 435                         str = lpnt;
 436                         len -= num2;
 437                         while (num2--)
 438                                 *str++ = *buf++;        /* copy in the bytes */
 439                         lpnt = str;
 440                 }
 441 }
 442
 443 /*
 444  *      long lgetc()    Read one character from input buffer
 445  *
 446  *  Returns 0 if EOF, otherwise the character
 447  */
 448 long
 449 lgetc()
 450 {
 451         int    i;
 452         if (ipoint != iepoint)
 453                 return (inbuffer[ipoint++]);
 454         if (iepoint != MAXIBUF)
 455                 return (0);
 456         if ((i = read(fd, inbuffer, MAXIBUF)) <= 0) {
 457                 if (i != 0)
 458                         write(1, "error reading from input file\n", 30);
 459                 iepoint = ipoint = 0;
 460                 return (0);
 461         }
 462         ipoint = 1;
 463         iepoint = i;
 464         return (*inbuffer);
 465 }
 466
 467 /*
 468  *      long lrint()    Read one integer from input buffer
 469  *
 470  *              +---------+---------+---------+---------+
 471  *              |   high  |         |         |   low   |
 472  *              |  order  |         |         |  order  |
 473  *              |   byte  |         |         |   byte  |
 474  *              +---------+---------+---------+---------+
 475  *             31  ---  24 23 --- 16 15 ---  8 7  ---   0
 476  *
 477  *      The save order is low order first, to high order (4 bytes total)
 478  *      Returns the int read
 479  */
 480 long
 481 lrint()
 482 {
 483         unsigned long i;
 484         i = 255 & lgetc();
 485         i |= (255 & lgetc()) << 8;
 486         i |= (255 & lgetc()) << 16;
 487         i |= (255 & lgetc()) << 24;
 488         return (i);
 489 }
 490
 491 /*
 492  *      lrfill(address,number)          put input bytes into a buffer
 493  *              char *address;
 494  *              int number;
 495  *
 496  *      Reads "number" bytes into the buffer pointed to by "address".
 497  *      Returns nothing of value
 498  */
 499 void
 500 lrfill(adr, num)
 501         char  *adr;
 502         int             num;
 503 {
 504         char  *pnt;
 505         int    num2;
 506         while (num) {
 507                 if (iepoint == ipoint) {
 508                         if (num > 5) {  /* fast way */
 509                                 if (read(fd, adr, num) != num)
 510                                         write(2, "error reading from input file\n", 30);
 511                                 num = 0;
 512                         } else {
 513                                 *adr++ = lgetc();
 514                                 --num;
 515                         }
 516                 } else {
 517                         num2 = iepoint - ipoint;        /* # of bytes left in
 518                                                          * the buffer    */
 519                         if (num2 > num)
 520                                 num2 = num;
 521                         pnt = inbuffer + ipoint;
 522                         num -= num2;
 523                         ipoint += num2;
 524                         while (num2--)
 525                                 *adr++ = *pnt++;
 526                 }
 527         }
 528 }
 529
 530 /*
 531  *      char *lgetw()                   Get a whitespace ended word from input
 532  *
 533  *      Returns pointer to a buffer that contains word.  If EOF, returns a NULL
 534  */
 535 char *
 536 lgetw()
 537 {
 538         char  *lgp, cc;
 539         int    n = LINBUFSIZE, quote = 0;
 540         lgp = lgetwbuf;
 541         do
 542                 cc = lgetc();
 543         while ((cc <= 32) && (cc > '\0'));      /* eat whitespace */
 544         for (;; --n, cc = lgetc()) {
 545                 if ((cc == '\0') && (lgp == lgetwbuf))
 546                         return (NULL);  /* EOF */
 547                 if ((n <= 1) || ((cc <= 32) && (quote == 0))) {
 548                         *lgp = '\0';
 549                         return (lgetwbuf);
 550                 }
 551                 if (cc != '"')
 552                         *lgp++ = cc;
 553                 else
 554                         quote ^= 1;
 555         }
 556 }
 557
 558 /*
 559  *      char *lgetl()   Function to read in a line ended by newline or EOF
 560  *
 561  * Returns pointer to a buffer that contains the line.  If EOF, returns NULL
 562  */
 563 char *
 564 lgetl()
 565 {
 566         int    i = LINBUFSIZE, ch;
 567         char  *str = lgetwbuf;
 568         for (;; --i) {
 569                 if ((*str++ = ch = lgetc()) == '\0') {
 570                         if (str == lgetwbuf + 1)
 571                                 return (NULL);  /* EOF */
 572         ot:             *str = '\0';
 573                         return (lgetwbuf);      /* line ended by EOF */
 574                 }
 575                 if ((ch == '\n') || (i <= 1))
 576                         goto ot;/* line ended by \n */
 577         }
 578 }
 579
 580 /*
 581  *      lcreat(filename)                        Create a new file for write
 582  *              char *filename;
 583  *
 584  *      lcreat((char*)0); means to the terminal
 585  *      Returns -1 if error, otherwise the file descriptor opened.
 586  */
 587 int
 588 lcreat(str)
 589         char *str;
 590 {
 591         lpnt = lpbuf;
 592         lpend = lpbuf + BUFBIG;
 593         if (str == NULL)
 594                 return (lfd = 1);
 595         if ((lfd = creat(str, 0644)) < 0) {
 596                 lfd = 1;
 597                 lprintf("error creating file <%s>: %s\n", str,
 598                         strerror(errno));
 599                 lflush();
 600                 return (-1);
 601         }
 602         return (lfd);
 603 }
 604
 605 /*
 606  *      lopen(filename)                 Open a file for read
 607  *              char *filename;
 608  *
 609  *      lopen(0) means from the terminal
 610  *      Returns -1 if error, otherwise the file descriptor opened.
 611  */
 612 int
 613 lopen(str)
 614         char           *str;
 615 {
 616         ipoint = iepoint = MAXIBUF;
 617         if (str == NULL)
 618                 return (fd = 0);
 619         if ((fd = open(str, 0)) < 0) {
 620                 lwclose();
 621                 lfd = 1;
 622                 lpnt = lpbuf;
 623                 return (-1);
 624         }
 625         return (fd);
 626 }
 627
 628 /*
 629  *      lappend(filename)               Open for append to an existing file
 630  *              char *filename;
 631  *
 632  *      lappend(0) means to the terminal
 633  *      Returns -1 if error, otherwise the file descriptor opened.
 634  */
 635 int
 636 lappend(str)
 637         char           *str;
 638 {
 639         lpnt = lpbuf;
 640         lpend = lpbuf + BUFBIG;
 641         if (str == NULL)
 642                 return (lfd = 1);
 643         if ((lfd = open(str, 2)) < 0) {
 644                 lfd = 1;
 645                 return (-1);
 646         }
 647         lseek(lfd, 0, 2);       /* seek to end of file */
 648         return (lfd);
 649 }
 650
 651 /*
 652  *      lrclose() close the input file
 653  *
 654  *      Returns nothing of value.
 655  */
 656 void
 657 lrclose()
 658 {
 659         if (fd > 0)
 660                 close(fd);
 661 }
 662
 663 /*
 664  *      lwclose() close output file flushing if needed
 665  *
 666  *      Returns nothing of value.
 667  */
 668 void
 669 lwclose()
 670 {
 671         lflush();
 672         if (lfd > 2)
 673                 close(lfd);
 674 }
 675
 676 /*
 677  *      lprcat(string)  append a string to the output buffer
 678  *                              avoids calls to lprintf (time consuming)
 679  */
 680 void
 681 lprcat(str)
 682         char  *str;
 683 {
 684         char  *str2;
 685         if (lpnt >= lpend)
 686                 lflush();
 687         str2 = lpnt;
 688         while ((*str2++ = *str++) != '\0')
 689                 continue;
 690         lpnt = str2 - 1;
 691 }
 692
 693 #ifdef VT100
 694 /*
 695  *      cursor(x,y)             Subroutine to set the cursor position
 696  *
 697  *      x and y are the cursor coordinates, and lpbuff is the output buffer where
 698  *      escape sequence will be placed.
 699  */
 700 static char    *y_num[] = {
 701 "\33[", "\33[", "\33[2", "\33[3", "\33[4", "\33[5", "\33[6",
 702 "\33[7", "\33[8", "\33[9", "\33[10", "\33[11", "\33[12", "\33[13", "\33[14",
 703 "\33[15", "\33[16", "\33[17", "\33[18", "\33[19", "\33[20", "\33[21", "\33[22",
 704 "\33[23", "\33[24"};
 705
 706 static char    *x_num[] = {
 707 "H", "H", ";2H", ";3H", ";4H", ";5H", ";6H", ";7H", ";8H", ";9H",
 708 ";10H", ";11H", ";12H", ";13H", ";14H", ";15H", ";16H", ";17H", ";18H", ";19H",
 709 ";20H", ";21H", ";22H", ";23H", ";24H", ";25H", ";26H", ";27H", ";28H", ";29H",
 710 ";30H", ";31H", ";32H", ";33H", ";34H", ";35H", ";36H", ";37H", ";38H", ";39H",
 711 ";40H", ";41H", ";42H", ";43H", ";44H", ";45H", ";46H", ";47H", ";48H", ";49H",
 712 ";50H", ";51H", ";52H", ";53H", ";54H", ";55H", ";56H", ";57H", ";58H", ";59H",
 713 ";60H", ";61H", ";62H", ";63H", ";64H", ";65H", ";66H", ";67H", ";68H", ";69H",
 714 ";70H", ";71H", ";72H", ";73H", ";74H", ";75H", ";76H", ";77H", ";78H", ";79H",
 715 ";80H"};
 716
 717 void
 718 cursor(x, y)
 719         int             x, y;
 720 {
 721         char  *p;
 722         if (lpnt >= lpend)
 723                 lflush();
 724
 725         p = y_num[y];           /* get the string to print */
 726         while (*p)
 727                 *lpnt++ = *p++; /* print the string */
 728
 729         p = x_num[x];           /* get the string to print */
 730         while (*p)
 731                 *lpnt++ = *p++; /* print the string */
 732 }
 733 #else   /* VT100 */
 734 /*
 735  * cursor(x,y)    Put cursor at specified coordinates staring at [1,1] (termcap)
 736  */
 737 void
 738 cursor(x, y)
 739         int             x, y;
 740 {
 741         if (lpnt >= lpend)
 742                 lflush();
 743
 744         *lpnt++ = CURSOR;
 745         *lpnt++ = x;
 746         *lpnt++ = y;
 747 }
 748 #endif  /* VT100 */
 749
 750 /*
 751  *      Routine to position cursor at beginning of 24th line
 752  */
 753 void
 754 cursors()
 755 {
 756         cursor(1, 24);
 757 }
 758
 759 #ifndef VT100
 760 /*
 761  * Warning: ringing the bell is control code 7. Don't use in defines.
 762  * Don't change the order of these defines.
 763  * Also used in helpfiles. Codes used in helpfiles should be \E[1 to \E[7 with
 764  * obvious meanings.
 765  */
 766
 767 struct tinfo   *info;
 768 char           *CM, *CE, *CD, *CL, *SO, *SE, *AL, *DL;  /* Termcap capabilities */
 769 static char    *outbuf = 0;     /* translated output buffer */
 770
 771 /*
 772  * init_term()          Terminal initialization -- setup termcap info
 773  */
 774 void
 775 init_term()
 776 {
 777         char           *term;
 778
 779         switch (t_getent(&info, term = getenv("TERM"))) {
 780         case -1:
 781                 write(2, "Cannot open termcap file.\n", 26);
 782                 exit(1);
 783         case 0:
 784                 write(2, "Cannot find entry of ", 21);
 785                 write(2, term, strlen(term));
 786                 write(2, " in termcap\n", 12);
 787                 exit(1);
 788         };
 789
 790         CM = t_agetstr(info, "cm");     /* Cursor motion */
 791         CE = t_agetstr(info, "ce");     /* Clear to eoln */
 792         CL = t_agetstr(info, "cl");     /* Clear screen */
 793
 794         /* OPTIONAL */
 795         AL = t_agetstr(info, "al");     /* Insert line */
 796         DL = t_agetstr(info, "dl");     /* Delete line */
 797         SO = t_agetstr(info, "so");     /* Begin standout mode */
 798         SE = t_agetstr(info, "se");     /* End standout mode */
 799         CD = t_agetstr(info, "cd");     /* Clear to end of display */
 800
 801         if (!CM) {              /* can't find cursor motion entry */
 802                 write(2, "Sorry, for a ", 13);
 803                 write(2, term, strlen(term));
 804                 write(2, ", I can't find the cursor motion entry in termcap\n", 50);
 805                 exit(1);
 806         }
 807         if (!CE) {              /* can't find clear to end of line entry */
 808                 write(2, "Sorry, for a ", 13);
 809                 write(2, term, strlen(term));
 810                 write(2, ", I can't find the clear to end of line entry in termcap\n", 57);
 811                 exit(1);
 812         }
 813         if (!CL) {              /* can't find clear entire screen entry */
 814                 write(2, "Sorry, for a ", 13);
 815                 write(2, term, strlen(term));
 816                 write(2, ", I can't find the clear entire screen entry in termcap\n", 56);
 817                 exit(1);
 818         }
 819         if ((outbuf = malloc(BUFBIG + 16)) == 0) {      /* get memory for
 820                                                          * decoded output buffer */
 821                 write(2, "Error malloc'ing memory for decoded output buffer\n", 50);
 822                 died(-285);     /* malloc() failure */
 823         }
 824 }
 825 #endif  /* VT100 */
 826
 827 /*
 828  * cl_line(x,y)  Clear the whole line indicated by 'y' and leave cursor at [x,y]
 829  */
 830 void
 831 cl_line(x, y)
 832         int             x, y;
 833 {
 834 #ifdef VT100
 835         cursor(x, y);
 836         lprcat("\33[2K");
 837 #else   /* VT100 */
 838         cursor(1, y);
 839         *lpnt++ = CL_LINE;
 840         cursor(x, y);
 841 #endif  /* VT100 */
 842 }
 843
 844 /*
 845  * cl_up(x,y) Clear screen from [x,1] to current position. Leave cursor at [x,y]
 846  */
 847 void
 848 cl_up(x, y)
 849         int    x, y;
 850 {
 851 #ifdef VT100
 852         cursor(x, y);
 853         lprcat("\33[1J\33[2K");
 854 #else   /* VT100 */
 855         int    i;
 856         cursor(1, 1);
 857         for (i = 1; i <= y; i++) {
 858                 *lpnt++ = CL_LINE;
 859                 *lpnt++ = '\n';
 860         }
 861         cursor(x, y);
 862 #endif  /* VT100 */
 863 }
 864
 865 /*
 866  * cl_dn(x,y)   Clear screen from [1,y] to end of display. Leave cursor at [x,y]
 867  */
 868 void
 869 cl_dn(x, y)
 870         int    x, y;
 871 {
 872 #ifdef VT100
 873         cursor(x, y);
 874         lprcat("\33[J\33[2K");
 875 #else   /* VT100 */
 876         int    i;
 877         cursor(1, y);
 878         if (!CD) {
 879                 *lpnt++ = CL_LINE;
 880                 for (i = y; i <= 24; i++) {
 881                         *lpnt++ = CL_LINE;
 882                         if (i != 24)
 883                                 *lpnt++ = '\n';
 884                 }
 885                 cursor(x, y);
 886         } else
 887                 *lpnt++ = CL_DOWN;
 888         cursor(x, y);
 889 #endif  /* VT100 */
 890 }
 891
 892 /*
 893  * standout(str)        Print the argument string in inverse video (standout mode).
 894  */
 895 void
 896 standout(str)
 897         char  *str;
 898 {
 899 #ifdef VT100
 900         setbold();
 901         while (*str)
 902                 *lpnt++ = *str++;
 903         resetbold();
 904 #else   /* VT100 */
 905         *lpnt++ = ST_START;
 906         while (*str)
 907                 *lpnt++ = *str++;
 908         *lpnt++ = ST_END;
 909 #endif  /* VT100 */
 910 }
 911
 912 /*
 913  * set_score_output()   Called when output should be literally printed.
 914  */
 915 void
 916 set_score_output()
 917 {
 918         enable_scroll = -1;
 919 }
 920
 921 /*
 922  *      lflush()        Flush the output buffer
 923  *
 924  *      Returns nothing of value.
 925  *      for termcap version: Flush output in output buffer according to output
 926  *      status as indicated by `enable_scroll'
 927  */
 928 #ifndef VT100
 929 static int      scrline = 18;   /* line # for wraparound instead of scrolling
 930                                  * if no DL */
 931 void
 932 lflush()
 933 {
 934         int    lpoint;
 935         u_char  *str;
 936         static int      curx = 0;
 937         static int      cury = 0;
 938         char tgoto_buf[256];
 939
 940         if ((lpoint = lpnt - lpbuf) > 0) {
 941 #ifdef EXTRA
 942                 c[BYTESOUT] += lpoint;
 943 #endif
 944                 if (enable_scroll <= -1) {
 945                         flush_buf();
 946                         if (write(lfd, lpbuf, lpoint) != lpoint)
 947                                 write(2, "error writing to output file\n", 29);
 948                         lpnt = lpbuf;   /* point back to beginning of buffer */
 949                         return;
 950                 }
 951                 for (str = lpbuf; str < lpnt; str++) {
 952                         if (*str >= 32) {
 953                                 xputchar(*str);
 954                                 curx++;
 955                         } else
 956                                 switch (*str) {
 957                                 case CLEAR:
 958                                         tputs(CL, 0, xputchar);
 959                                         curx = cury = 0;
 960                                         break;
 961
 962                                 case CL_LINE:
 963                                         tputs(CE, 0, xputchar);
 964                                         break;
 965
 966                                 case CL_DOWN:
 967                                         tputs(CD, 0, xputchar);
 968                                         break;
 969
 970                                 case ST_START:
 971                                         tputs(SO, 0, xputchar);
 972                                         break;
 973
 974                                 case ST_END:
 975                                         tputs(SE, 0, xputchar);
 976                                         break;
 977
 978                                 case CURSOR:
 979                                         curx = *++str - 1;
 980                                         cury = *++str - 1;
 981                                         if (t_goto(info, CM, curx, cury,
 982                                                    tgoto_buf, 255) == 0)
 983                                                 tputs(tgoto_buf, 0, xputchar);
 984                                         break;
 985
 986                                 case '\n':
 987                                         if ((cury == 23) && enable_scroll) {
 988                                                 if (!DL || !AL) {       /* wraparound or scroll? */
 989                                                         if (++scrline > 23)
 990                                                                 scrline = 19;
 991
 992                                                         if (++scrline > 23)
 993                                                                 scrline = 19;
 994                                                         if (t_goto(info, CM, 0,
 995                                                                    scrline,
 996                                                                    tgoto_buf,
 997                                                                    255) == 0)
 998                                                                 tputs(tgoto_buf,
 999                                                                       0,
1000                                                                       xputchar);
1001                                                         tputs(CE, 0, xputchar);
1002
1003                                                         if (--scrline < 19)
1004                                                                 scrline = 23;
1005                                                         if (t_goto(info, CM, 0,
1006                                                                    scrline,
1007                                                                    tgoto_buf,
1008                                                                    255) == 0)
1009                                                                 tputs(tgoto_buf,
1010                                                                       0,
1011                                                                       xputchar);
1012                                                         tputs(CE, 0, xputchar);
1013                                                 } else {
1014                                                         if (t_goto(info, CM, 0,
1015                                                                    19,
1016                                                                    tgoto_buf,
1017                                                                    255) == 0)
1018                                                                 tputs(tgoto_buf,
1019                                                                       0,
1020                                                                       xputchar);
1021                                                         tputs(DL, 0, xputchar);
1022                                                         if (t_goto(info, CM, 0,
1023                                                                    23,
1024                                                                    tgoto_buf,
1025                                                                    255) == 0)
1026                                                                 tputs(tgoto_buf,
1027                                                                       0,
1028                                                                       xputchar);
1029                                                         /*
1030                                                          * tputs (AL, 0,
1031                                                          * xputchar);
1032                                                          */
1033                                                 }
1034                                         } else {
1035                                                 xputchar('\n');
1036                                                 cury++;
1037                                         }
1038                                         curx = 0;
1039                                         break;
1040
1041                                 default:
1042                                         xputchar(*str);
1043                                         curx++;
1044                                 };
1045                 }
1046         }
1047         lpnt = lpbuf;
1048         flush_buf();            /* flush real output buffer now */
1049 }
1050 #else   /* VT100 */
1051 /*
1052  *      lflush()                flush the output buffer
1053  *
1054  *      Returns nothing of value.
1055  */
1056 void
1057 lflush()
1058 {
1059         int    lpoint;
1060         if ((lpoint = lpnt - lpbuf) > 0) {
1061 #ifdef EXTRA
1062                 c[BYTESOUT] += lpoint;
1063 #endif
1064                 if (write(lfd, lpbuf, lpoint) != lpoint)
1065                         write(2, "error writing to output file\n", 29);
1066         }
1067         lpnt = lpbuf;           /* point back to beginning of buffer */
1068 }
1069 #endif  /* VT100 */
1070
1071 #ifndef VT100
1072 static int      vindex = 0;
1073 /*
1074  * xputchar(ch)         Print one character in decoded output buffer.
1075  */
1076 int
1077 xputchar(c)
1078         int             c;
1079 {
1080         outbuf[vindex++] = c;
1081         if (vindex >= BUFBIG)
1082                 flush_buf();
1083         return (0);
1084 }
1085
1086 /*
1087  * flush_buf()                  Flush buffer with decoded output.
1088  */
1089 void
1090 flush_buf()
1091 {
1092         if (vindex)
1093                 write(lfd, outbuf, vindex);
1094         vindex = 0;
1095 }
1096
1097 /*
1098  *      char *tmcapcnv(sd,ss)  Routine to convert VT100 escapes to termcap
1099  *      format
1100  *      Processes only the \33[#m sequence (converts . files for termcap use
1101  */
1102 char *
1103 tmcapcnv(sd, ss)
1104         char  *sd, *ss;
1105 {
1106         int    tmstate = 0;     /* 0=normal, 1=\33 2=[ 3=# */
1107         char            tmdigit = 0;    /* the # in \33[#m */
1108         while (*ss) {
1109                 switch (tmstate) {
1110                 case 0:
1111                         if (*ss == '\33') {
1112                                 tmstate++;
1113                                 break;
1114                         }
1115         ign:            *sd++ = *ss;
1116         ign2:           tmstate = 0;
1117                         break;
1118                 case 1:
1119                         if (*ss != '[')
1120                                 goto ign;
1121                         tmstate++;
1122                         break;
1123                 case 2:
1124                         if (isdigit((u_char)*ss)) {
1125                                 tmdigit = *ss - '0';
1126                                 tmstate++;
1127                                 break;
1128                         }
1129                         if (*ss == 'm') {
1130                                 *sd++ = ST_END;
1131                                 goto ign2;
1132                         }
1133                         goto ign;
1134                 case 3:
1135                         if (*ss == 'm') {
1136                                 if (tmdigit)
1137                                         *sd++ = ST_START;
1138                                 else
1139                                         *sd++ = ST_END;
1140                                 goto ign2;
1141                         }
1142                 default:
1143                         goto ign;
1144                 };
1145                 ss++;
1146         }
1147         *sd = 0;                /* NULL terminator */
1148         return (sd);
1149 }
1150 #endif  /* VT100 */
1151
1152 /*
1153  *      beep()  Routine to emit a beep if enabled (see no-beep in .larnopts)
1154  */
1155 void
1156 beep()
1157 {
1158         if (!nobeep)
1159                 *lpnt++ = '\7';
1160 }