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    Length: 5218 (0x1462)
    Types: TextFile
    Names: »fasl.h«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─ ⟦this⟧ »EUUGD11/gnu-31mar87/scheme/microcode/fasl.h« 

TextFile

/*          Hey EMACS, this is -*- C -*- code!                 */

/****************************************************************
*                                                               *
*                         Copyright (c) 1985                    *
*               Massachusetts Institute of Technology           *
*                                                               *
* This material was developed by the Scheme project at the      *
* Massachusetts Institute of Technology, Department of          *
* Electrical Engineering and Computer Science.  Permission to   *
* copy this software, to redistribute it, and to use it for any *
* purpose is granted, subject to the following restrictions and *
* understandings.                                               *
*                                                               *
* 1. Any copy made of this software must include this copyright *
* notice in full.                                               *
*                                                               *
* 2. Users of this software agree to make their best efforts (a)*
* to return to the MIT Scheme project any improvements or       *
* extensions that they make, so that these may be included in   *
* future releases; and (b) to inform MIT of noteworthy uses of  *
* this software.                                                *
*                                                               *
* 3.  All materials developed as a consequence of the use of    *
* this software shall duly acknowledge such use, in accordance  *
* with the usual standards of acknowledging credit in academic  *
* research.                                                     *
*                                                               *
* 4. MIT has made no warrantee or representation that the       *
* operation of this software will be error-free, and MIT is     *
* under no obligation to provide any services, by way of        *
* maintenance, update, or otherwise.                            *
*                                                               *
* 5.  In conjunction with products arising from the use of this *
* material, there shall be no use of the name of the            *
* Massachusetts Institute of Technology nor of any adaptation   *
* thereof in any advertising, promotional, or sales literature  *
* without prior written consent from MIT in each case.          *
*                                                               *
****************************************************************/
\f


/* File: FASL.H
   Contains information relating to the format of FASL files.
   Some information is contained in CONFIG.H.
*/

/* FASL Version */

#define FASL_FILE_MARKER	0XFAFAFAFA
#define FASL_FORMAT_ADDED_STACK	1
#define FASL_FORMAT_VERSION	1
#define FASL_SUBVERSION		5

/* The FASL file has a header which begins as follows: */

#define FASL_HEADER_LENGTH	50	/* Scheme objects in header */
#define FASL_OLD_LENGTH		8	/* Size of header earlier */
#define FASL_Offset_Marker	0	/* Marker to indicate FASL format */
#define FASL_Offset_Heap_Count	1	/* Count of objects in heap */
#define FASL_Offset_Heap_Base	2	/* Address of heap when dumped */
#define FASL_Offset_Dumped_Obj	3	/* Where dumped object was */
#define FASL_Offset_Const_Count	4	/* Count of objects in const. area */
#define FASL_Offset_Const_Base	5	/* Address of const. area at dump */
#define FASL_Offset_Version	6	/* FASL format version info. */ 
#define FASL_Offset_Stack_Top	7	/* Top of stack when dumped */
#define FASL_Offset_Ext_Loc	8	/* Where ext. prims. vector is */

#define FASL_Offset_First_Free	9	/* Used to clear header */

/* Version information encoding */

#define MACHINE_TYPE_LENGTH (POINTER_LENGTH/2)
#define MACHINE_TYPE_MASK ((1<<MACHINE_TYPE_LENGTH)-1)
#define The_Machine_Type(P) ((P) & MACHINE_TYPE_MASK)
#define SUB_VERSION_LENGTH (MACHINE_TYPE_LENGTH-TYPE_CODE_LENGTH)
#define SUB_VERSION_MASK ((1<<SUB_VERSION_LENGTH)-1)
#define The_Sub_Version(P) (((P) >> MACHINE_TYPE_LENGTH) & SUB_VERSION_MASK)
#define The_Version(P) Type_Code(P)
#define Make_Version(V, S, M)					\
  Make_Non_Pointer((V), (((S) << MACHINE_TYPE_LENGTH) | (M)))
\f


#define WRITE_FLAG		"w"
#define OPEN_FLAG		"r"

/* "Memorable" FASL sub-versions -- ones where we modified something
   and want to remain backwards compatible
*/

#define FASL_OLDEST_SUPPORTED	2
#define FASL_LONG_HEADER	3
#define FASL_DENSE_TYPES	4
#define FASL_PADDED_STRINGS	5

/* Old Type Codes -- used for conversion purposes */

#define OLD_TC_CHARACTER			0x40
#define OLD_TC_PCOMB2				0x44
#define OLD_TC_VECTOR				0x46
#define OLD_TC_RETURN_CODE			0x48
#define OLD_TC_COMPILED_PROCEDURE		0x49
#define OLD_TC_ENVIRONMENT			0x4E
#define OLD_TC_FIXNUM				0x50
#define OLD_TC_CONTROL_POINT			0x56
#define OLD_TC_BROKEN_HEART			0x58
#define OLD_TC_COMBINATION			0x5E
#define OLD_TC_MANIFEST_NM_VECTOR		0x60
#define OLD_TC_PCOMB3				0x66
#define OLD_TC_SPECIAL_NM_VECTOR 		0x68
#define OLD_TC_THE_ENVIRONMENT			0x70
#define OLD_TC_VECTOR_1B			0x76
#define OLD_TC_BIT_STRING			0x76
#define OLD_TC_PCOMB0				0x78
#define OLD_TC_VECTOR_16B			0x7E
#define OLD_TC_UNASSIGNED			0x38
#define OLD_TC_SEQUENCE_3			0x3C