/* fmtdy.h: DYLAN OBJECT FORMAT
 *
 * $Id$
 * Copyright (c) 2001 Ravenbrook Limited.  See end of file for license.
 */

#ifndef fmtdy_h
#define fmtdy_h

#include "mps.h"

/* Low-level routines, exposed here so that the with-header format
 * can use common code. */
extern mps_res_t dylan_scan1(mps_ss_t, mps_addr_t *);
extern mps_res_t dylan_scan1_weak(mps_ss_t, mps_addr_t *);

/* Format */
extern mps_fmt_A_s *dylan_fmt_A(void);
extern mps_fmt_A_s *dylan_fmt_A_weak(void);
extern mps_fmt_B_s *dylan_fmt_B(void);
extern mps_fmt_B_s *dylan_fmt_B_weak(void);
extern mps_res_t dylan_fmt(mps_fmt_t *, mps_arena_t);
extern mps_res_t dylan_fmt_weak(mps_fmt_t *, mps_arena_t);

extern mps_addr_t dylan_weak_dependent(mps_addr_t);

extern void dylan_pad(mps_addr_t addr, size_t size);
extern int dylan_wrapper_check(mps_word_t *w);

/* Constants describing wrappers. Used only for debugging / testing */
#define WW 0    /* offset of Wrapper-Wrapper */
#define WC 1    /* offset of Class pointer*/
#define WM 2    /* offset of subtype Mask */
#define WF 3    /* offset of Fixed part descriptor */
#define WV 4    /* offset of Vector part descriptor */
#define WS 5    /* offset of Size field for pattern vector */
#define WP 6    /* offset of Pattern 0, if present */

#define BASIC_WRAPPER_SIZE (WS + 1) /* size of wrapper with no patterns */

#define ALIGN sizeof(mps_word_t)    /* alignment for Dylan format */

#endif /* fmtdy_h */


/* C. COPYRIGHT AND LICENSE
 *
 * Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
 * All rights reserved.  This is an open source license.  Contact
 * Ravenbrook for commercial licensing options.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * 3. Redistributions in any form must be accompanied by information on how
 * to obtain complete source code for this software and any accompanying
 * software that uses this software.  The source code must either be
 * included in the distribution or be available for no more than the cost
 * of distribution plus a nominal fee, and must be freely redistributable
 * under reasonable conditions.  For an executable file, complete source
 * code means the source code for all modules it contains. It does not
 * include source code for modules or files that typically accompany the
 * major components of the operating system on which the executable file
 * runs.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */