menu/libmenu/com32io.h

   1 /* -*- c -*- ------------------------------------------------------------- *
   2  *
   3  *   Copyright 2004-2005 Murali Krishnan Ganapathy - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 #ifndef __COM32IO_H__
  14 #define __COM32IO_H__
  15
  16 #include <com32.h>
  17
  18 #ifndef NULL
  19 #define NULL ((void *)0)
  20 #endif
  21
  22 /* BIOS Assisted output routines */
  23
  24 void cswprint(const char *str, char attr, char left);
  25 // Print a C str (NUL-terminated) respecting the left edge of window
  26 // i.e. \n in str will move cursor to column left
  27 // Print a C str (NUL-terminated)
  28
  29 static inline void csprint(const char *str, char attr)
  30 {
  31   cswprint(str,attr,0);
  32 }
  33
  34 void cprint(char chr,char attr,unsigned int times, char disppage); // Print a char
  35
  36 void setdisppage(char num); // Set the display page to specified number
  37
  38 char getdisppage(); // Get current display page
  39
  40 void gotoxy(char row,char col, char page);
  41
  42 void getpos(char * row, char * col, char page);
  43
  44 char inputc(char * scancode); // Return ASCII char by val, and scancode by reference
  45
  46 static inline void putch(char x, char attr, char page)
  47 {
  48    cprint(x,attr,1,page);
  49 }
  50
  51 void setcursorshape(char start,char end); // Set cursor shape
  52 void getcursorshape(char *start,char *end); // Get shape for current page
  53
  54 // Get char displayed at current position in specified page
  55 unsigned char getcharat(char page);
  56
  57 static inline void cursoroff(void) /* Turns off cursor */
  58 {
  59    setcursorshape(32,33);
  60 }
  61
  62 static inline void cursoron(void) /* Turns on cursor */
  63 {
  64    setcursorshape(6,7);
  65 }
  66
  67 static inline unsigned char readbiosb(unsigned int ofs)
  68 {
  69    return *((unsigned char *)MK_PTR(0,ofs));
  70 }
  71
  72 static inline char getnumrows()
  73 {
  74     return readbiosb(0x484); // Actually numrows - 1
  75 }
  76
  77 static inline char getnumcols(void)
  78 {
  79     return readbiosb(0x44a); // Actually numcols
  80 }
  81
  82 static inline char getshiftflags(void)
  83 {
  84     return readbiosb(0x417);
  85 }
  86
  87 void scrollupwindow(char top, char left, char bot,char right,char attr,char numlines); //Scroll up given window
  88
  89 static inline void scrollup(void) //Scroll up display screen by one line
  90 {
  91    scrollupwindow(0,0,getnumrows(),getnumcols(),0x07,1);
  92 }
  93
  94 void setvideomode(char mode); // Set the video mode.
  95
  96 static inline char getvideomode(void)  // Get the current video mode
  97 {
  98    return readbiosb(0x449);
  99 }
 100
 101 unsigned char sleep(unsigned int msec); // Sleep for specified time
 102
 103 void beep(); // A Bell
 104
 105 unsigned char checkkbdbuf(); // Check to see if there is kbd buffer is non-empty?
 106
 107 static inline void clearkbdbuf()   // Clear the kbd buffer (how many chars removed?)
 108 {
 109    while (checkkbdbuf()) inputc(NULL);
 110 }
 111
 112 #endif