payloads/libpayload/curses/PDCurses/dos/pdcgetsc.c

   1 /* Public Domain Curses */
   2
   3 #include "pdcdos.h"
   4
   5 RCSID("$Id: pdcgetsc.c,v 1.42 2008/07/13 16:08:17 wmcbrine Exp $")
   6
   7 #include <stdlib.h>
   8
   9 /* return width of screen/viewport */
  10
  11 int PDC_get_columns(void)
  12 {
  13     PDCREGS regs;
  14     int cols;
  15     const char *env_cols;
  16
  17     PDC_LOG(("PDC_get_columns() - called\n"));
  18
  19     /* use the value from COLS environment variable, if set. MH 10-Jun-92 */
  20     /* and use the minimum of COLS and return from int10h    MH 18-Jun-92 */
  21
  22     regs.h.ah = 0x0f;
  23     PDCINT(0x10, regs);
  24     cols = (int)regs.h.ah;
  25
  26     env_cols = getenv("COLS");
  27
  28     if (env_cols)
  29         cols = min(atoi(env_cols), cols);
  30
  31     PDC_LOG(("PDC_get_columns() - returned: cols %d\n", cols));
  32
  33     return cols;
  34 }
  35
  36 /* get the cursor size/shape */
  37
  38 int PDC_get_cursor_mode(void)
  39 {
  40     PDC_LOG(("PDC_get_cursor_mode() - called\n"));
  41
  42     return getdosmemword(0x460);
  43 }
  44
  45 /* return number of screen rows */
  46
  47 int PDC_get_rows(void)
  48 {
  49     const char *env_rows;
  50     int rows;
  51
  52     PDC_LOG(("PDC_get_rows() - called\n"));
  53
  54     /* use the value from LINES environment variable, if set. MH 10-Jun-92 */
  55     /* and use the minimum of LINES and *ROWS.                MH 18-Jun-92 */
  56
  57     rows = getdosmembyte(0x484) + 1;
  58     env_rows = getenv("LINES");
  59
  60     if (env_rows)
  61         rows = min(atoi(env_rows), rows);
  62
  63     if (rows == 1 && pdc_adapter == _MDS_GENIUS)
  64         rows = 66;
  65     if (rows == 1 && pdc_adapter == _MDA)
  66         rows = 25;
  67
  68     if (rows == 1)
  69     {
  70         rows = 25;
  71         pdc_direct_video = FALSE;
  72     }
  73
  74     switch (pdc_adapter)
  75     {
  76     case _EGACOLOR:
  77     case _EGAMONO:
  78         switch (rows)
  79         {
  80         case 25:
  81         case 43:
  82             break;
  83         default:
  84             rows = 25;
  85         }
  86         break;
  87
  88     case _VGACOLOR:
  89     case _VGAMONO:
  90         break;
  91
  92     default:
  93         rows = 25;
  94         break;
  95     }
  96
  97     PDC_LOG(("PDC_get_rows() - returned: rows %d\n", rows));
  98
  99     return rows;
 100 }