diff options
Diffstat (limited to 'qemu/roms/ipxe/src/core/getkey.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/getkey.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/qemu/roms/ipxe/src/core/getkey.c b/qemu/roms/ipxe/src/core/getkey.c deleted file mode 100644 index 0f0f8b7c3..000000000 --- a/qemu/roms/ipxe/src/core/getkey.c +++ /dev/null @@ -1,91 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or 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 - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <ctype.h> -#include <ipxe/console.h> -#include <ipxe/process.h> -#include <ipxe/keys.h> -#include <ipxe/timer.h> -#include <ipxe/nap.h> - -/** @file - * - * Special key interpretation - * - */ - -#define GETKEY_TIMEOUT ( TICKS_PER_SEC / 4 ) - -/** - * Read character from console if available within timeout period - * - * @v timeout Timeout period, in ticks (0=indefinite) - * @ret character Character read from console - */ -static int getchar_timeout ( unsigned long timeout ) { - unsigned long start = currticks(); - - while ( ( timeout == 0 ) || ( ( currticks() - start ) < timeout ) ) { - step(); - if ( iskey() ) - return getchar(); - cpu_nap(); - } - - return -1; -} - -/** - * Get single keypress - * - * @v timeout Timeout period, in ticks (0=indefinite) - * @ret key Key pressed - * - * The returned key will be an ASCII value or a KEY_XXX special - * constant. This function differs from getchar() in that getchar() - * will return "special" keys (e.g. cursor keys) as a series of - * characters forming an ANSI escape sequence. - */ -int getkey ( unsigned long timeout ) { - int character; - unsigned int n = 0; - - character = getchar_timeout ( timeout ); - if ( character != ESC ) - return character; - - while ( ( character = getchar_timeout ( GETKEY_TIMEOUT ) ) >= 0 ) { - if ( character == '[' ) - continue; - if ( isdigit ( character ) ) { - n = ( ( n * 10 ) + ( character - '0' ) ); - continue; - } - if ( character >= 0x40 ) - return KEY_ANSI ( n, character ); - } - - return ESC; -} |