ref: 2e941b777d32cdfc5d023f5e127da580edabadc3
dir: /src/m_cheat.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // $Id: m_cheat.c 8 2005-07-23 16:44:57Z 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 1.2 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 8 2005-07-23 16:44:57Z fraggle $"; #include "m_cheat.h" // // CHEAT SEQUENCE PACKAGE // static int firsttime = 1; static unsigned char cheat_xlate_table[256]; // // 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 ) { int i; int rc = 0; if (firsttime) { firsttime = 0; for (i=0;i<256;i++) cheat_xlate_table[i] = SCRAMBLE(i); } if (!cht->p) cht->p = cht->sequence; // initialize if first time if (*cht->p == 0) *(cht->p++) = key; else if (cheat_xlate_table[(unsigned char)key] == *cht->p) cht->p++; else cht->p = cht->sequence; if (*cht->p == 1) cht->p++; else if (*cht->p == 0xff) // end of sequence character { cht->p = cht->sequence; rc = 1; } return rc; } void cht_GetParam ( cheatseq_t* cht, char* buffer ) { unsigned char *p, c; p = cht->sequence; while (*(p++) != 1); do { c = *p; *(buffer++) = c; *(p++) = 0; } while (c && *p!=0xff ); if (*p==0xff) *buffer = 0; }