mirror of
https://github.com/ipxe/ipxe
synced 2025-12-24 06:22:59 +03:00
8406115834
Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <ctype.h>
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#include <console.h>
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#include <ipxe/process.h>
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#include <ipxe/keys.h>
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#include <ipxe/timer.h>
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/** @file
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*
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* Special key interpretation
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*
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*/
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#define GETKEY_TIMEOUT ( TICKS_PER_SEC / 4 )
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/**
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* Read character from console if available within timeout period
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*
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* @v timeout Timeout period, in ticks
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* @ret character Character read from console
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*/
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static int getchar_timeout ( unsigned long timeout ) {
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unsigned long expiry = ( currticks() + timeout );
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while ( currticks() < expiry ) {
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step();
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if ( iskey() )
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return getchar();
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}
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return -1;
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}
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/**
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* Get single keypress
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*
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* @ret key Key pressed
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*
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* The returned key will be an ASCII value or a KEY_XXX special
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* constant. This function differs from getchar() in that getchar()
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* will return "special" keys (e.g. cursor keys) as a series of
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* characters forming an ANSI escape sequence.
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*/
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int getkey ( void ) {
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int character;
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unsigned int n = 0;
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character = getchar();
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if ( character != ESC )
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return character;
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while ( ( character = getchar_timeout ( GETKEY_TIMEOUT ) ) >= 0 ) {
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if ( character == '[' )
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continue;
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if ( isdigit ( character ) ) {
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n = ( ( n * 10 ) + ( character - '0' ) );
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continue;
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}
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if ( character >= 0x40 )
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return KEY_ANSI ( n, character );
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}
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return ESC;
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}
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