os2/cons.handler.os2.c

   1 /* Client interface for General purpose OS/2 console save/restore server.
   2         1997 Alexander Dong <ado@software-ag.de>
   3    Having the same interface as its Linux counterpart:
   4         Copyright (C) 1994 Janne Kukonlehto <jtklehto@stekt.oulu.fi>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 #include <config.h>
  23 #ifndef __os2__
  24 #error This file is for OS/2 operating systems.
  25 #else
  26
  27 #define INCL_BASE
  28 #define INCL_NOPM
  29 #define INCL_VIO
  30 #define INCL_KBD
  31 #define INCL_DOS
  32 #define INCL_SUB
  33 #define INCL_DOSERRORS
  34
  35 #include <os2.h>
  36
  37 #include "tty.h"
  38 #include "util.h"
  39 #include "win.h"
  40 #include "cons.saver.h"
  41
  42 signed char console_flag = 1;
  43 static unsigned char *scr_buffer;
  44 static unsigned char *pointer;
  45
  46 static int GetScrRows();
  47 static int GetScrCols();
  48
  49 static int GetScrRows()
  50 {
  51    VIOMODEINFO pvMode = {80};
  52    unsigned int hVio = 0;
  53    VioGetMode(&pvMode, hVio);
  54    return (pvMode.row ? pvMode.row: 25);
  55 }
  56
  57 static int GetScrCols()
  58 {
  59    VIOMODEINFO pvMode = {80};
  60    unsigned int hVio = 0;
  61    VioGetMode(&pvMode, hVio);
  62    return (pvMode.col ? pvMode.col: 80);
  63 }
  64
  65 void show_console_contents (int starty, unsigned char begin_line, unsigned char end_line)
  66 {
  67    int col = GetScrCols();
  68    int row = GetScrRows();
  69    int n;
  70    register int z;
  71
  72    pointer = scr_buffer;
  73    for (z=0; z<(begin_line * col); z++) {
  74       pointer++; pointer++;
  75    }
  76    n = (end_line - begin_line + 1) * col;
  77    VioWrtCellStr((PCH) pointer, (USHORT) n, begin_line, 0, 0);
  78    return; /* .ado */
  79 }
  80
  81 void handle_console (unsigned char action)
  82 {
  83    static int col;
  84    static int row;
  85    int        n;
  86
  87    switch (action) {
  88    case CONSOLE_INIT:           /* Initialize */
  89       col = GetScrCols();
  90       row = GetScrRows();
  91       scr_buffer = (unsigned char *) malloc(col * row * 2);  /* short values */
  92       n = col * row * 2;
  93       VioReadCellStr((PCH) scr_buffer, (USHORT *) &n, 0, 0, 0); /* Just save it */
  94       break;
  95    case CONSOLE_DONE:
  96       free(scr_buffer);
  97       break;
  98    case CONSOLE_SAVE:           /* Save the screen */
  99       n = col * row * 2;
 100       VioReadCellStr((PCH) scr_buffer, (USHORT *) &n, 0, 0, 0);
 101       break;
 102    case CONSOLE_RESTORE:
 103       n = col * row * 2;
 104       VioWrtCellStr ((PCH) scr_buffer, (USHORT) n, 0, 0, 0); /* Write it back */
 105       break;
 106    default:
 107       /* This is not possible, but if we are here, just save the screen */
 108       handle_console(CONSOLE_SAVE);
 109      break;
 110    }
 111    return; /* .ado */
 112 }
 113
 114 #endif // !__os2__