apps/zde/kbd.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   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, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23
  24 #include "kbd.h"
  25
  26
  27 unsigned char kbd_us[128] =
  28 {
  29     0,  27, '1', '2', '3', '4', '5', '6', '7', '8',     /* 9 */
  30   '9', '0', '-', '=', '\b',     /* Backspace */
  31   '\t',                 /* Tab */
  32   'q', 'w', 'e', 'r',   /* 19 */
  33   't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', /* Enter key */
  34     0,                  /* 29   - Control */
  35   'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',     /* 39 */
  36  '\'', '`',   0,                /* Left shift */
  37  '\\', 'z', 'x', 'c', 'v', 'b', 'n',                    /* 49 */
  38   'm', ',', '.', '/',   0,                              /* Right shift */
  39   '*',
  40     0,  /* Alt */
  41   ' ',  /* Space bar */
  42     0,  /* Caps lock */
  43     0,  /* 59 - F1 key ... > */
  44     0,   0,   0,   0,   0,   0,   0,   0,
  45     0,  /* < ... F10 */
  46     0,  /* 69 - Num lock*/
  47     0,  /* Scroll Lock */
  48     0,  /* Home key */
  49     0,  /* Up Arrow */
  50     0,  /* Page Up */
  51   '-',
  52     0,  /* Left Arrow */
  53     0,
  54     0,  /* Right Arrow */
  55   '+',
  56     0,  /* 79 - End key*/
  57     0,  /* Down Arrow */
  58     0,  /* Page Down */
  59     0,  /* Insert Key */
  60     0,  /* Delete Key */
  61     0,   0,   0,
  62     0,  /* F11 Key */
  63     0,  /* F12 Key */
  64     0,  /* All other keys are undefined */
  65 };
  66
  67 static char kbd_buffer[KBD_BUFFER_LEN];
  68 static unsigned char kbd_buffer_pos;
  69
  70 unsigned char kbd_getkey ()
  71 {
  72         if (kbd_buffer_pos > 0)
  73                 kbd_buffer_pos --;
  74
  75         unsigned char c = kbd_buffer[kbd_buffer_pos];
  76
  77         kbd_buffer[kbd_buffer_pos] = '\0';
  78
  79         return c;
  80 }
  81
  82 void kbd_update ()
  83 {
  84         int scancode = getkey ();
  85
  86         /*if (scancode == keycode)
  87                 return 1;
  88
  89         if (scancode == keycode+128)
  90                 return 2;
  91         else
  92                 return 0;*/
  93
  94         /* KP_DOWN */
  95         if (scancode >= 128 && kbd_buffer_pos < KBD_BUFFER_LEN) {
  96                 kbd_buffer[kbd_buffer_pos] = kbd_us[scancode - 128];
  97                 kbd_buffer_pos ++;
  98         }
  99 }
 100
 101 int init_kbd ()
 102 {
 103         /* set socket "1" to non-blocking */
 104         /*int oldFlag = fcntl (1, F_GETFL, 0);
 105         if (fcntl (1, F_SETFL, oldFlag | O_NONBLOCK) == -1) {
 106                 printf ("Cant set socket to nonblocking mode\n");
 107                 return -1;
 108         }*/
 109
 110         kbd_buffer_pos = 0;
 111         memset (kbd_buffer, 0, KBD_BUFFER_LEN);
 112
 113         return 0;
 114 }