00001 #include "keyboard.h"
00002 #include <termios.h>
00003 #include <unistd.h>
00004
00005 static struct termios initial_settings, new_settings;
00006 static int peek_character = -1;
00007
00008 void init_keyboard()
00009 {
00010 tcgetattr(0,&initial_settings);
00011 new_settings = initial_settings;
00012 new_settings.c_lflag &= ~ICANON;
00013 new_settings.c_lflag &= ~ECHO;
00014 new_settings.c_lflag &= ~ISIG;
00015 new_settings.c_cc[VMIN] = 1;
00016 new_settings.c_cc[VTIME] = 0;
00017 tcsetattr(0, TCSANOW, &new_settings);
00018 }
00019
00020 void close_keyboard()
00021 {
00022 tcsetattr(0, TCSANOW, &initial_settings);
00023 }
00024
00025 int kbhit()
00026 {
00027 unsigned char ch;
00028 int nread;
00029
00030 if (peek_character != -1) return 1;
00031 new_settings.c_cc[VMIN]=0;
00032 tcsetattr(0, TCSANOW, &new_settings);
00033 nread = read(0,&ch,1);
00034 new_settings.c_cc[VMIN]=1;
00035 tcsetattr(0, TCSANOW, &new_settings);
00036 if(nread == 1)
00037 {
00038 peek_character = ch;
00039 return 1;
00040 }
00041 return 0;
00042 }
00043
00044 int readch()
00045 {
00046 char ch;
00047
00048 if(peek_character != -1)
00049 {
00050 ch = peek_character;
00051 peek_character = -1;
00052 return ch;
00053 }
00054 read(0,&ch,1);
00055 return ch;
00056 }
00057
00058 int _getch() {
00059 init_keyboard();
00060 kbhit();
00061 char c = readch();
00062 close_keyboard();
00063 return c;
00064 }
