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#define FILE_TYPE_DISK    0x01
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#define FILE_TYPE_DISK    0x01
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#define FILE_TYPE_CHAR    0x02
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#define FILE_TYPE_CHAR    0x02
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#define FILE_TYPE_PIPE    0x03
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#define FILE_TYPE_PIPE    0x03
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#define FILE_TYPE_REMOTE  0x80
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#define FILE_TYPE_REMOTE  0x80
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/* Returns file type of stdout.
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 * Output, one of predefined values above indicating if
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/* checks if stdout appears to be redirected. returns 0 if not, non-zero otherwise. */
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 *         handle refers to file (FILE_TYPE_DISK), a
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 *         device such as CON (FILE_TYPE_CHAR), a
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 *         pipe (FILE_TYPE_PIPE), or unknown.
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 * On errors or unspecified input, FILE_TYPE_UNKNOWN
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 * is returned. */
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static unsigned char GetStdoutType(void) {
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static unsigned char is_stdout_redirected(void) {
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  union REGS r;
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  union REGS r;
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  r.x.ax = 0x4400;                 /* DOS 2+, IOCTL Get Device Info */
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  r.x.ax = 0x4400;                 /* DOS 2+, IOCTL Get Device Info */
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  r.x.bx = 0x0001;                 /* file handle (stdout) */
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  r.x.bx = 0x0001;                 /* file handle (stdout) */
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  /* We assume hFile is an opened DOS handle, & if invalid call should fail. */
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  intdos(&r, &r);     /* Clib function to invoke DOS int21h call   */
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  intdos(&r, &r);     /* Clib function to invoke DOS int21h call   */
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  /* error? */
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  /* error? */
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  if (r.x.cflag != 0) return(FILE_TYPE_UNKNOWN);
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  if (r.x.cflag != 0) return(FILE_TYPE_UNKNOWN);
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  /* if bit 7 is set it is a char dev */
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  /* if bit 7 is set it is a char dev (not redirected to disk) */
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  if (r.x.dx & 0x80) return(FILE_TYPE_CHAR);
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  if (r.x.dx & 0x80) return(0);
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  /* file is remote */
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  if (r.x.dx & 0x8000) return(FILE_TYPE_REMOTE);
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  /* assume valid file handle */
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  /* assume valid file handle */
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  return(FILE_TYPE_DISK);
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  return(1);
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}
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}
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/* sets rows & cols to size of actual console window
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/* sets rows & cols to size of actual console window
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 * force NOPAUSE if appears output redirected to a file or
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 * force NOPAUSE if appears output redirected to a file or
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 */
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 */
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static void getConsoleSize(void) {
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static void getConsoleSize(void) {
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  unsigned short far *bios_cols = (unsigned short far *)MK_FP(0x40,0x4A);
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  unsigned short far *bios_cols = (unsigned short far *)MK_FP(0x40,0x4A);
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  unsigned short far *bios_size = (unsigned short far *)MK_FP(0x40,0x4C);
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  unsigned short far *bios_size = (unsigned short far *)MK_FP(0x40,0x4C);
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  switch (GetStdoutType()) {
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  if (is_stdout_redirected() != 0) {
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    case FILE_TYPE_DISK: /* e.g. redirected to a file, tree > filelist.txt */
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    /* e.g. redirected to a file, tree > filelist.txt */
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      /* Output to a file or program, so no screen to fill (no max cols or rows) */
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    /* Output to a file or program, so no screen to fill (no max cols or rows) */
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      pause = NOPAUSE;   /* so ignore request to pause */
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      pause = NOPAUSE;   /* so ignore request to pause */
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      break;
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    case FILE_TYPE_CHAR:  /* e.g. the console */
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  } else { /* e.g. the console */
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    case FILE_TYPE_UNKNOWN:  /* else at least attempt to get proper limits */
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    case FILE_TYPE_REMOTE:
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    default:
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      if ((*bios_cols == 0) || (*bios_size == 0)) { /* MDA does not report size */
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    if ((*bios_cols == 0) || (*bios_size == 0)) { /* MDA does not report size */
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        cols = 80;
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      cols = 80;
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        rows = 23;
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      rows = 23;
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      } else {
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    } else {
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        cols = *bios_cols;
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      cols = *bios_cols;
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        rows = *bios_size / cols / 2;
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      rows = *bios_size / cols / 2;
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        if (rows > 2) rows -= 2; /* necessary to keep screen from scrolling */
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      if (rows > 2) rows -= 2; /* necessary to keep screen from scrolling */
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      }
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    }
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      break;
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  }
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  }
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}
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}
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/* when pause == NOPAUSE then identical to printf,
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/* when pause == NOPAUSE then identical to printf,