khanat-opennel-code/code/nel/samples/net/chat/kbhit.cpp

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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifdef __GNUC__
#include "kbhit.h"
#include <termios.h>
#include <unistd.h> // for read()
#include <stdio.h>
static struct termios initial_settings, new_settings;
static int peek_character = -1;
void init_keyboard()
{
tcgetattr(STDIN_FILENO,&initial_settings);
new_settings = initial_settings;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
new_settings.c_lflag &= ~ISIG;
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
}
void close_keyboard()
{
tcsetattr(STDIN_FILENO, TCSANOW, &initial_settings);
}
int kbhit()
{
unsigned char ch;
int nread;
if (peek_character != -1) return 1;
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new_settings.c_cc[VMIN]=0;
tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
nread = read(STDIN_FILENO,&ch,1);
new_settings.c_cc[VMIN]=1;
tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
if(nread == 1)
{
peek_character = ch;
return 1;
}
return 0;
}
int getch()
{
char ch;
if(peek_character != -1)
{
ch = peek_character;
peek_character = -1;
return ch;
}
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if (read(STDIN_FILENO,&ch,1) != 1) return ' ';
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return ch;
}
#endif // __GNUC__