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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: m_cheat.c 162 2005-10-04 21:41:42Z fraggle $
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// 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 (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 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., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// $Log$
// Revision 1.3 2005/10/04 21:41:42 fraggle
// Rewrite cheats code. Add dehacked cheat replacement.
//
// Revision 1.2 2005/07/23 16:44:55 fraggle
// Update copyright to GNU GPL
//
// Revision 1.1.1.1 2005/07/23 16:20:31 fraggle
// Initial import
//
//
// DESCRIPTION:
// Cheat sequence checking.
//
//-----------------------------------------------------------------------------
static const char
rcsid[] = "$Id: m_cheat.c 162 2005-10-04 21:41:42Z fraggle $";
#include <string.h>
#include "doomtype.h"
#include "m_cheat.h"
//
// CHEAT SEQUENCE PACKAGE
//
//
// Called in st_stuff module, which handles the input.
// Returns a 1 if the cheat was successful, 0 if failed.
//
int
cht_CheckCheat
( cheatseq_t* cht,
char key )
{
// if we make a short sequence on a cheat with parameters, this
// will not work in vanilla doom. behave the same.
if (cht->parameter_chars > 0 && strlen(cht->sequence) < cht->sequence_len)
return false;
if (cht->chars_read < strlen(cht->sequence))
{
// still reading characters from the cheat code
// and verifying. reset back to the beginning
// if a key is wrong
if (key == cht->sequence[cht->chars_read])
++cht->chars_read;
else
cht->chars_read = 0;
cht->param_chars_read = 0;
}
else if (cht->param_chars_read < cht->parameter_chars)
{
// we have passed the end of the cheat sequence and are
// entering parameters now
cht->parameter_buf[cht->param_chars_read] = key;
++cht->param_chars_read;
}
if (cht->chars_read >= strlen(cht->sequence)
&& cht->param_chars_read >= cht->parameter_chars)
{
cht->chars_read = cht->param_chars_read = 0;
return true;
}
// cheat not matched yet
return false;
}
void
cht_GetParam
( cheatseq_t* cht,
char* buffer )
{
memcpy(buffer, cht->parameter_buf, cht->parameter_chars);
}
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