anykey.c

   1 /*
   2  * This file is part of the sigrok-cli project.
   3  *
   4  * Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "sigrok-cli.h"
  21 #include <stdio.h>
  22 #ifdef _WIN32
  23 #include <windows.h>
  24 #else
  25 #include <termios.h>
  26 #endif
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <glib.h>
  30
  31 #ifdef _WIN32
  32 static HANDLE stdin_handle;
  33 static DWORD stdin_mode;
  34 #else
  35 static struct termios term_orig;
  36 #endif
  37
  38 static int received_anykey(int fd, int revents, void *cb_data)
  39 {
  40         struct sr_session *session;
  41         (void)fd;
  42         (void)revents;
  43
  44         session = cb_data;
  45         sr_session_source_remove(session, STDIN_FILENO);
  46         sr_session_stop(session);
  47
  48         return TRUE;
  49 }
  50
  51 /* Turn off buffering on stdin. */
  52 void add_anykey(struct sr_session *session)
  53 {
  54 #ifdef _WIN32
  55         stdin_handle = GetStdHandle(STD_INPUT_HANDLE);
  56
  57         if (!GetConsoleMode(stdin_handle, &stdin_mode)) {
  58                 /* TODO: Error handling. */
  59         }
  60
  61         SetConsoleMode(stdin_handle, 0);
  62 #else
  63         struct termios term;
  64
  65         tcgetattr(STDIN_FILENO, &term);
  66         memcpy(&term_orig, &term, sizeof(struct termios));
  67         term.c_lflag &= ~(ECHO | ICANON | ISIG);
  68         tcsetattr(STDIN_FILENO, TCSADRAIN, &term);
  69 #endif
  70
  71         sr_session_source_add(session, STDIN_FILENO, G_IO_IN, -1,
  72                         received_anykey, session);
  73
  74         g_message("Press any key to stop acquisition.");
  75 }
  76
  77 /* Restore stdin attributes. */
  78 void clear_anykey(void)
  79 {
  80 #ifdef _WIN32
  81         SetConsoleMode(stdin_handle, stdin_mode);
  82 #else
  83         tcflush(STDIN_FILENO, TCIFLUSH);
  84         tcsetattr(STDIN_FILENO, TCSANOW, &term_orig);
  85 #endif
  86 }