/*
 * mzcrypto: crypto library for mzscheme
 * Copyright (C) 2007 Dimitris Vyzovitis <vyzo@media.mit.edu>
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA
 */
#include "escheme.h"

#ifdef MZ_PRECISE_GC
START_XFORM_SKIP;
#endif
static Scheme_Object* offset_ptr( int argc, Scheme_Object** argv ) {
  Scheme_Object* o;
  o = scheme_malloc_tagged( sizeof(Scheme_Simple_Object) );
  o->type = scheme_cpointer_type;
  SCHEME_CPTR_VAL(o) = SCHEME_BYTE_STR_VAL( argv[1] ) + SCHEME_INT_VAL( argv[2] );
  SCHEME_CPTR_TYPE(o) = argv[0];
  return o;
}
#ifdef MZ_PRECISE_GC
END_XFORM_SKIP;
#endif

Scheme_Object* scheme_reload( Scheme_Env* env ) {
  Scheme_Env* module;
  module = scheme_primitive_module( scheme_intern_symbol( "_compat" ), env );
  scheme_add_global( "offset-ptr",
   scheme_make_prim_w_arity( offset_ptr, "offset-ptr", 3, 3 ), module );
  scheme_finish_primitive_module( module );
  return scheme_void;
}

Scheme_Object* scheme_initialize( Scheme_Env* env ) {
  return scheme_reload( env );
}

Scheme_Object* scheme_module_name() {
  return scheme_intern_symbol( "_compat" );
}