196 lines
6.8 KiB
C
196 lines
6.8 KiB
C
/******************************************************************************
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Copyright (c) 1992, 1995, 1996 Xerox Corporation. All rights reserved.
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Portions of this code were written by Stephen White, aka ghond.
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Use and copying of this software and preparation of derivative works based
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upon this software are permitted. Any distribution of this software or
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derivative works must comply with all applicable United States export
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control laws. This software is made available AS IS, and Xerox Corporation
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makes no warranty about the software, its performance or its conformity to
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any specification. Any person obtaining a copy of this software is requested
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to send their name and post office or electronic mail address to:
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Pavel Curtis
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Xerox PARC
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3333 Coyote Hill Rd.
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Palo Alto, CA 94304
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Pavel@Xerox.Com
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*****************************************************************************/
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#ifndef Structures_h
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#define Structures_h 1
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#include <stdio.h>
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#include <math.h>
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#include <float.h>
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#include "pconfig.h"
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typedef int32 Objid;
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typedef unsigned char Byte;
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#define IS_REAL(x) (-DBL_MAX <= (x) && (x) <= DBL_MAX)
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#define addref(X) (++((int *)(X))[-1])
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#define delref(X) (--((int *)(X))[-1])
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#define refcount(X) (((int *)(X))[-1])
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/*
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* Special Objid's
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*/
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#define SYSTEM_OBJECT 0
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#define NOTHING -1
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#define AMBIGUOUS -2
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#define FAILED_MATCH -3
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/* Do not reorder or otherwise modify this list, except to add new elements at
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* the end, since the order here defines the numeric equivalents of the error
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* values, and those equivalents are both DB-accessible knowledge and stored in
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* raw form in the DB.
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*/
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enum error {
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E_NONE, E_TYPE, E_DIV, E_PERM, E_PROPNF, E_VERBNF, E_VARNF, E_INVIND,
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E_RECMOVE, E_MAXREC, E_RANGE, E_ARGS, E_NACC, E_INVARG, E_QUOTA, E_FLOAT
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};
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/* Do not reorder or otherwise modify this list, except to add new elements at
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* the end, since the order here defines the numeric equivalents of the type
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* values, and those equivalents are both DB-accessible knowledge and stored in
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* raw form in the DB.
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*/
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typedef enum {
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TYPE_INT, TYPE_OBJ, _TYPE_STR, TYPE_ERR, _TYPE_LIST, /* user-visible */
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TYPE_CLEAR, /* in clear properties' value slot */
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TYPE_NONE, /* in uninitialized MOO variables */
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TYPE_CATCH, /* on-stack marker for an exception handler */
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TYPE_FINALLY, /* on-stack marker for a TRY-FINALLY clause */
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_TYPE_FLOAT /* floating-point number; user-visible */
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} var_type;
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/* Types which have external data should be marked with the TYPE_COMPLEX_FLAG
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* so that free_var/var_ref/var_dup can recognize them easily. This flag is
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* only set in memory. The original _TYPE values are used in the database
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* file and returned to verbs calling typeof(). This allows the inlines to
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* be extremely cheap (both in space and time) for simple types like oids
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* and ints.
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*/
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#define TYPE_DB_MASK 0x7f
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#define TYPE_COMPLEX_FLAG 0x80
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#define TYPE_STR (_TYPE_STR | TYPE_COMPLEX_FLAG)
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#define TYPE_FLOAT (_TYPE_FLOAT | TYPE_COMPLEX_FLAG)
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#define TYPE_LIST (_TYPE_LIST | TYPE_COMPLEX_FLAG)
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#define TYPE_ANY ((var_type) -1) /* wildcard for use in declaring built-ins */
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#define TYPE_NUMERIC ((var_type) -2) /* wildcard for (integer or float) */
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typedef struct Var Var;
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/* Experimental. On the Alpha, DEC cc allows us to specify certain
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* pointers to be 32 bits, but only if we compile and link with "-taso
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* -xtaso" in CFLAGS, which limits us to a 31-bit address space. This
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* could be a win if your server is thrashing. Running JHM's db, SIZE
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* went from 50M to 42M. No doubt these pragmas could be applied
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* elsewhere as well, but I know this at least manages to load and run
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* a non-trivial db.
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*/
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/* #define SHORT_ALPHA_VAR_POINTERS 1 */
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#ifdef SHORT_ALPHA_VAR_POINTERS
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#pragma pointer_size save
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#pragma pointer_size short
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#endif
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struct Var {
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union {
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const char *str; /* STR */
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int32 num; /* NUM, CATCH, FINALLY */
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Objid obj; /* OBJ */
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enum error err; /* ERR */
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Var *list; /* LIST */
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double *fnum; /* FLOAT */
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} v;
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var_type type;
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};
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#ifdef SHORT_ALPHA_VAR_POINTERS
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#pragma pointer_size restore
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#endif
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extern Var zero; /* useful constant */
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#endif /* !Structures_h */
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/*
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* $Log: structures.h,v $
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* Revision 1.1.1.1 2004/02/26 13:14:00 jesse
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* Initial import into CVS
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*
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* Revision 1.4 1998/12/14 13:19:04 nop
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* Merge UNSAFE_OPTS (ref fixups); fix Log tag placement to fit CVS whims
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*
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* Revision 1.3 1997/07/07 03:24:55 nop
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* Merge UNSAFE_OPTS (r5) after extensive testing.
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*
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* Revision 1.2.2.2 1997/05/23 07:01:30 nop
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* Added experimental support for 32-bit pointer model on Alpha with DEC cc.
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*
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* Revision 1.2.2.1 1997/03/20 18:07:52 bjj
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* Add a flag to the in-memory type identifier so that inlines can cheaply
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* identify Vars that need actual work done to ref/free/dup them. Add the
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* appropriate inlines to utils.h and replace old functions in utils.c with
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* complex_* functions which only handle the types with external storage.
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*
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* Revision 1.2 1997/03/03 04:19:29 nop
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* GNU Indent normalization
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*
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* Revision 1.1.1.1 1997/03/03 03:45:04 nop
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* LambdaMOO 1.8.0p5
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*
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* Revision 2.1 1996/02/08 06:12:21 pavel
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* Added E_FLOAT, TYPE_FLOAT, and TYPE_NUMERIC. Renamed TYPE_NUM to TYPE_INT.
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* Updated copyright notice for 1996. Release 1.8.0beta1.
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*
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* Revision 2.0 1995/11/30 04:55:46 pavel
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* New baseline version, corresponding to release 1.8.0alpha1.
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*
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* Revision 1.12 1992/10/23 23:03:47 pavel
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* Added copyright notice.
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*
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* Revision 1.11 1992/10/21 03:02:35 pavel
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* Converted to use new automatic configuration system.
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*
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* Revision 1.10 1992/09/14 17:40:51 pjames
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* Moved db_modification code to db modules.
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*
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* Revision 1.9 1992/09/04 01:17:29 pavel
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* Added support for the `f' (for `fertile') bit on objects.
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*
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* Revision 1.8 1992/09/03 16:25:12 pjames
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* Added TYPE_CLEAR for Var.
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* Changed Property definition lists to be arrays instead of linked lists.
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*
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* Revision 1.7 1992/08/31 22:25:04 pjames
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* Changed some `char *'s to `const char *'
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*
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* Revision 1.6 1992/08/14 00:00:36 pavel
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* Converted to a typedef of `var_type' = `enum var_type'.
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*
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* Revision 1.5 1992/08/10 16:52:00 pjames
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* Moved several types/procedure declarations to storage.h
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*
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* Revision 1.4 1992/07/30 21:24:31 pjames
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* Added M_COND_ARM_STACK and M_STMT_STACK for vector.c
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*
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* Revision 1.3 1992/07/28 17:18:48 pjames
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* Added M_COND_ARM_STACK for unparse.c
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*
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* Revision 1.2 1992/07/27 18:21:34 pjames
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* Changed name of ct_env to var_names, const_env to literals and
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* f_vectors to fork_vectors, removed M_CT_ENV, M_LOCAL_ENV, and
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* M_LABEL_MAPS, changed M_CONST_ENV to M_LITERALS, M_IM_STACK to
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* M_EXPR_STACK, M_F_VECTORS to M_FORK_VECTORS, M_ID_LIST to M_VL_LIST
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* and M_ID_VALUE to M_VL_VALUE.
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*
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* Revision 1.1 1992/07/20 23:23:12 pavel
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* Initial RCS-controlled version.
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*/
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