Patch #2969 - Doom! Currently only working on the H300.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9312 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 104 insertions, 0 deletions

diff --git a/apps/plugins/doom/m_cheat.c b/apps/plugins/doom/m_cheat.c
new file mode 100644
index 0000000000..afd68e960d
--- /dev/null
+++ b/apps/plugins/doom/m_cheat.c
@@ -0,0 +1,104 @@
+// Emacs style mode select   -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id$
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+//
+// 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.
+//
+// $Log$
+// Revision 1.1  2006/03/28 15:44:01  dave
+// Patch #2969 - Doom!  Currently only working on the H300.
+//
+//
+// DESCRIPTION:
+// Cheat sequence checking.
+//
+//-----------------------------------------------------------------------------
+
+#include "m_cheat.h"
+
+//
+// CHEAT SEQUENCE PACKAGE
+//
+
+static int  firsttime = 1;
+static unsigned char cheat_xlate_table[20];
+
+
+//
+// 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;
+
+}
+
+