146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*************************************************************************
|
|
* *
|
|
* YAP Prolog %W% %G%
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: Atoms.h.m4 *
|
|
* Last rev: 19/2/88 *
|
|
* mods: *
|
|
* comments: atom properties header file for YAP *
|
|
* *
|
|
*************************************************************************/
|
|
|
|
#ifndef ATOMS_H
|
|
#define ATOMS_H 1
|
|
|
|
#ifndef EXTERN
|
|
#ifndef ADTDEFS_C
|
|
#define EXTERN static
|
|
#else
|
|
#define EXTERN
|
|
#endif
|
|
#endif
|
|
|
|
#include <wchar.h>
|
|
|
|
typedef struct atom_blob {
|
|
size_t length;
|
|
char data[MIN_ARRAY];
|
|
} atom_blob_t;
|
|
|
|
/********* operations for atoms ****************************************/
|
|
|
|
/* Atoms are assumed to be uniquely represented by an OFFSET and to have
|
|
associated with them a struct of type AtomEntry
|
|
The two functions
|
|
RepAtom : Atom -> *AtomEntry
|
|
AbsAtom : *AtomEntry -> Atom
|
|
are used to encapsulate the implementation of atoms
|
|
*/
|
|
|
|
typedef struct AtomEntryStruct *Atom;
|
|
typedef struct PropEntryStruct *Prop;
|
|
|
|
|
|
/* I can only define the structure after I define the actual atoms */
|
|
|
|
/* atom structure */
|
|
typedef struct AtomEntryStruct
|
|
{
|
|
Atom NextOfAE; /* used to build hash chains */
|
|
Prop PropsOfAE; /* property list for this atom */
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
rwlock_t ARWLock;
|
|
#endif
|
|
|
|
union {
|
|
char uStrOfAE[MIN_ARRAY]; /* representation of atom as a string */
|
|
wchar_t uWStrOfAE[MIN_ARRAY]; /* representation of atom as a string */
|
|
struct atom_blob blob[MIN_ARRAY];
|
|
} rep;
|
|
}
|
|
AtomEntry;
|
|
|
|
// compatible with C and C++;
|
|
typedef struct ExtraAtomEntryStruct
|
|
{
|
|
Atom NextOfAE; /* used to build hash chains */
|
|
Prop PropsOfAE; /* property list for this atom */
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
rwlock_t ARWLock;
|
|
#endif
|
|
|
|
union {
|
|
char uStrOfAE[4]; /* representation of atom as a string */
|
|
wchar_t uWStrOfAE[2]; /* representation of atom as a string */
|
|
struct atom_blob blob[2];
|
|
} rep;
|
|
}
|
|
ExtraAtomEntry;
|
|
|
|
#define StrOfAE rep.uStrOfAE
|
|
#define WStrOfAE rep.uWStrOfAE
|
|
|
|
|
|
/* Props and Atoms are stored in chains, ending with a NIL */
|
|
#ifdef USE_OFFSETS
|
|
# define EndOfPAEntr(P) ( Addr(P) == AtomBase)
|
|
#else
|
|
# define EndOfPAEntr(P) ( Addr(P) == NIL )
|
|
#endif
|
|
|
|
|
|
/* ********************** Properties **********************************/
|
|
|
|
#if defined(USE_OFFSETS)
|
|
#define USE_OFFSETS_IN_PROPS 1
|
|
#else
|
|
#define USE_OFFSETS_IN_PROPS 0
|
|
#endif
|
|
|
|
typedef SFLAGS PropFlags;
|
|
|
|
/* basic property entry structure */
|
|
typedef struct PropEntryStruct
|
|
{
|
|
Prop NextOfPE; /* used to chain properties */
|
|
PropFlags KindOfPE; /* kind of property */
|
|
} PropEntry;
|
|
|
|
/* ************************* Functors **********************************/
|
|
|
|
/* Functor data type
|
|
abstype Functor = atom # int
|
|
with MkFunctor(a,n) = ...
|
|
and NameOfFunctor(f) = ...
|
|
and ArityOfFunctor(f) = ... */
|
|
|
|
#define MaxArity 255
|
|
|
|
typedef CELL arity_t;
|
|
|
|
#define FunctorProperty ((PropFlags)(0xbb00))
|
|
|
|
/* functor property */
|
|
typedef struct FunctorEntryStruct
|
|
{
|
|
Prop NextOfPE; /* used to chain properties */
|
|
PropFlags KindOfPE; /* kind of property */
|
|
arity_t ArityOfFE; /* arity of functor */
|
|
Atom NameOfFE; /* back pointer to owner atom */
|
|
Prop PropsOfFE; /* pointer to list of properties for this functor */
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
rwlock_t FRWLock;
|
|
#endif
|
|
} FunctorEntry;
|
|
|
|
typedef FunctorEntry *Functor;
|
|
|
|
|
|
#endif /* ATOMS_H */
|