nel/samples/net/chat/kbhit.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This source file has been modified by the following contributors:
   5 // Copyright (C) 2014  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
   6 //
   7 // This program is free software: you can redistribute it and/or modify
   8 // it under the terms of the GNU Affero General Public License as
   9 // published by the Free Software Foundation, either version 3 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU Affero General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU Affero General Public License
  18 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 #include "nel/misc/types_nl.h"
  21
  22 #ifndef NL_OS_WINDOWS
  23 #include "kbhit.h"
  24 #include <termios.h>
  25 #include <unistd.h>   // for read()
  26 #include <stdio.h>
  27
  28 static struct termios initial_settings, new_settings;
  29 static int peek_character = -1;
  30
  31 void init_keyboard()
  32 {
  33         tcgetattr(STDIN_FILENO,&initial_settings);
  34         new_settings = initial_settings;
  35         new_settings.c_lflag &= ~ICANON;
  36         new_settings.c_lflag &= ~ECHO;
  37         new_settings.c_lflag &= ~ISIG;
  38         new_settings.c_cc[VMIN] = 1;
  39         new_settings.c_cc[VTIME] = 0;
  40         tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
  41 }
  42
  43 void close_keyboard()
  44 {
  45         tcsetattr(STDIN_FILENO, TCSANOW, &initial_settings);
  46 }
  47
  48 int kbhit()
  49 {
  50         unsigned char ch;
  51         int nread;
  52
  53         if (peek_character != -1) return 1;
  54
  55         new_settings.c_cc[VMIN]=0;
  56         tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
  57         nread = read(STDIN_FILENO,&ch,1);
  58         new_settings.c_cc[VMIN]=1;
  59         tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
  60
  61         if(nread == 1)
  62         {
  63                 peek_character = ch;
  64                 return 1;
  65         }
  66         return 0;
  67 }
  68
  69 int getch()
  70 {
  71         char ch;
  72
  73         if(peek_character != -1)
  74         {
  75                 ch = peek_character;
  76                 peek_character = -1;
  77                 return ch;
  78         }
  79         if (read(STDIN_FILENO,&ch,1) != 1) return ' ';
  80
  81         return ch;
  82 }
  83
  84 #endif // __GNUC__