667 lines
13 KiB
C
Executable File
667 lines
13 KiB
C
Executable File
/*************************************************************************
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* *
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* YAP Prolog %W% %G% *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: TermExt.h *
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* mods: *
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* comments: Extensions to standard terms for YAP *
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* version: $Id: TermExt.h,v 1.15 2008-03-25 22:03:13 vsc Exp $ *
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*************************************************************************/
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#ifdef USE_SYSTEM_MALLOC
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#define SF_STORE (&(Yap_heap_regs->funcs))
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#else
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#define SF_STORE ((special_functors *)HEAP_INIT_BASE)
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#endif
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#ifdef USE_OFFSETS
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#define AtomFoundVar ((Atom)(&(((special_functors *)(NULL))->AtFoundVar)))
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#define AtomFreeTerm ((Atom)(&(((special_functors *)(NULL))->AtFreeTerm)))
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#define AtomNil ((Atom)(&(((special_functors *)(NULL))->AtNil)))
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#define AtomDot ((Atom)(&(((special_functors *)(NULL))->AtDot)))
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#elif defined(THREADS)
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#define AtomFoundVar AbsAtom(SF_STORE->AtFoundVar)
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#define AtomFreeTerm AbsAtom(SF_STORE->AtFreeTerm)
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#define AtomNil AbsAtom(SF_STORE->AtNil)
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#define AtomDot AbsAtom(SF_STORE->AtDot)
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#else
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#define AtomFoundVar AbsAtom(&(SF_STORE->AtFoundVar))
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#define AtomFreeTerm AbsAtom(&(SF_STORE->AtFreeTerm))
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#define AtomNil AbsAtom(&(SF_STORE->AtNil))
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#define AtomDot AbsAtom(&(SF_STORE->AtDot))
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#endif
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#define TermFoundVar MkAtomTerm(AtomFoundVar)
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#define TermFreeTerm MkAtomTerm(AtomFreeTerm)
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#define TermNil MkAtomTerm(AtomNil)
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#define TermDot MkAtomTerm(AtomDot)
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typedef enum
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{
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db_ref_e = sizeof (Functor *),
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attvar_e = 2*sizeof (Functor *),
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long_int_e = 3 * sizeof (Functor *),
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big_int_e = 4 * sizeof (Functor *),
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double_e = 5 * sizeof (Functor *)
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}
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blob_type;
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#define FunctorDBRef ((Functor)(db_ref_e))
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#define FunctorAttVar ((Functor)(attvar_e))
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#define FunctorLongInt ((Functor)(long_int_e))
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#define FunctorBigInt ((Functor)(big_int_e))
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#define FunctorDouble ((Functor)(double_e))
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#define EndSpecials (double_e+sizeof(Functor *))
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inline EXTERN int IsAttVar (CELL *pt);
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inline EXTERN int
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IsAttVar (CELL *pt)
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{
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CACHE_REGS
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return (pt)[-1] == (CELL)attvar_e && pt < H;
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}
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inline EXTERN int GlobalIsAttVar (CELL *pt);
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inline EXTERN int
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GlobalIsAttVar (CELL *pt)
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{
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return (pt)[-1] == (CELL)attvar_e;
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}
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typedef enum
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{
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BIG_INT = 0x01,
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BIG_RATIONAL = 0x02,
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BIG_FLOAT = 0x04,
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EMPTY_ARENA = 0x10,
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ARRAY_INT = 0x21,
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ARRAY_FLOAT = 0x22,
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CLAUSE_LIST = 0x40,
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BLOB_STRING = 0x80, /* SWI style strings */
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BLOB_WIDE_STRING = 0x81, /* SWI style strings */
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EXTERNAL_BLOB = 0x100, /* generic data */
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USER_BLOB_START = 0x1000, /* user defined blob */
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USER_BLOB_END = 0x1100 /* end of user defined blob */
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}
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big_blob_type;
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inline EXTERN blob_type BlobOfFunctor (Functor f);
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inline EXTERN blob_type
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BlobOfFunctor (Functor f)
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{
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return (blob_type) (f);
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}
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typedef struct cp_frame {
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CELL *start_cp;
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CELL *end_cp;
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CELL *to;
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#ifdef RATIONAL_TREES
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CELL oldv;
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int ground;
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#endif
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} copy_frame;
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#ifdef COROUTINING
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typedef struct
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{
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/* what to do when someone tries to bind our term to someone else
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in some predefined context */
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void (*bind_op) (Term *, Term CACHE_TYPE);
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/* what to do if someone wants to copy our constraint */
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int (*copy_term_op) (CELL *, struct cp_frame **, CELL * CACHE_TYPE);
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/* copy the constraint into a term and back */
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Term (*to_term_op) (CELL *);
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int (*term_to_op) (Term, Term CACHE_TYPE);
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/* op called to do marking in GC */
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void (*mark_op) (CELL *);
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} ext_op;
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/* known delays */
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typedef enum
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{
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empty_ext = 0 * sizeof (ext_op), /* default op, this should never be called */
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attvars_ext = 1 * sizeof (ext_op) /* support for attributed variables */
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/* add your own extensions here */
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/* keep this one */
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}
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exts;
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#endif
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/* make sure that these data structures are the first thing to be allocated
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in the heap when we start the system */
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#ifdef THREADS
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typedef struct special_functors_struct
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{
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AtomEntry *AtFoundVar;
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AtomEntry *AtFreeTerm;
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AtomEntry *AtNil;
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AtomEntry *AtDot;
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} special_functors;
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#else
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typedef struct special_functors_struct
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{
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AtomEntry AtFoundVar;
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char AtFoundVarChars[8];
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AtomEntry AtFreeTerm;
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char AtFreeTermChars[8];
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AtomEntry AtNil;
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char AtNilChars[8];
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AtomEntry AtDot;
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char AtDotChars[8];
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}
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special_functors;
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#endif
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inline EXTERN Float STD_PROTO (CpFloatUnaligned, (CELL *));
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#if SIZEOF_DOUBLE == SIZEOF_LONG_INT
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inline EXTERN Term MkFloatTerm (Float);
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inline EXTERN Term
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MkFloatTerm (Float dbl)
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{
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CACHE_REGS
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return (Term) ((H[0] = (CELL) FunctorDouble, *(Float *) (H + 1) =
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dbl, H[2] = EndSpecials, H +=
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3, AbsAppl (H - 3)));
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}
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inline EXTERN Float FloatOfTerm (Term t);
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inline EXTERN Float
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FloatOfTerm (Term t)
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{
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return (Float) (*(Float *) (RepAppl (t) + 1));
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}
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#define InitUnalignedFloat()
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inline extern Float
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CpFloatUnaligned(CELL *ptr)
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{
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return *((Float *)ptr);
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}
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#else
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#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
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inline EXTERN void STD_PROTO (AlignGlobalForDouble, ( USES_REGS1 ));
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#define DOUBLE_ALIGNED(ADDR) ((CELL)(ADDR) & 0x4)
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#ifdef i386
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inline EXTERN Float
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CpFloatUnaligned (CELL * ptr)
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{
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return *((Float *) (ptr + 1));
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}
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#else
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/* first, need to address the alignment problem */
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inline EXTERN Float
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CpFloatUnaligned (CELL * ptr)
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{
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union
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{
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Float f;
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CELL d[2];
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} u;
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u.d[0] = ptr[1];
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u.d[1] = ptr[2];
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return (u.f);
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}
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#endif
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inline EXTERN Term MkFloatTerm (Float);
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inline EXTERN Term
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MkFloatTerm (Float dbl)
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{
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CACHE_REGS
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return (Term) ((AlignGlobalForDouble ( PASS_REGS1 ), H[0] =
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(CELL) FunctorDouble, *(Float *) (H + 1) = dbl, H[3] =
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EndSpecials, H +=
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4, AbsAppl (H - 4)));
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}
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inline EXTERN Float FloatOfTerm (Term t);
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inline EXTERN Float
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FloatOfTerm (Term t)
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{
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return (Float) ((DOUBLE_ALIGNED (RepAppl (t)) ? *(Float *) (RepAppl (t) + 1)
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: CpFloatUnaligned (RepAppl (t))));
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}
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/* no alignment problems for 64 bit machines */
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#else
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/* OOPS, YAP only understands Floats that are as large as cells or that
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take two cells!!! */
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#endif
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#endif
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inline EXTERN int IsFloatTerm (Term);
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inline EXTERN int
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IsFloatTerm (Term t)
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{
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return (int) (IsApplTerm (t) && FunctorOfTerm (t) == FunctorDouble);
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}
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/* extern Functor FunctorLongInt; */
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inline EXTERN Term MkLongIntTerm (Int);
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inline EXTERN Term
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MkLongIntTerm (Int i)
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{
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CACHE_REGS
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H[0] = (CELL) FunctorLongInt;
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H[1] = (CELL) (i);
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H[2] = EndSpecials;
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H += 3;
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return AbsAppl(H - 3);
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}
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inline EXTERN Int LongIntOfTerm (Term t);
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inline EXTERN Int
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LongIntOfTerm (Term t)
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{
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return (Int) (RepAppl (t)[1]);
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}
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inline EXTERN int IsLongIntTerm (Term);
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inline EXTERN int
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IsLongIntTerm (Term t)
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{
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return (int) (IsApplTerm (t) && FunctorOfTerm (t) == FunctorLongInt);
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}
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#ifdef USE_GMP
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#include <stdio.h>
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#include <gmp.h>
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#else
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typedef UInt mp_limb_t;
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typedef struct {
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Int _mp_size, _mp_alloc;
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mp_limb_t *_mp_d;
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} MP_INT;
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typedef struct {
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MP_INT _mp_num;
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MP_INT _mp_den;
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} MP_RAT;
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#endif
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inline EXTERN int IsBigIntTerm (Term);
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inline EXTERN int
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IsBigIntTerm (Term t)
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{
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return (int) (IsApplTerm (t) && FunctorOfTerm (t) == FunctorBigInt);
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}
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#ifdef USE_GMP
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Term STD_PROTO (Yap_MkBigIntTerm, (MP_INT *));
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MP_INT *STD_PROTO (Yap_BigIntOfTerm, (Term));
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Term STD_PROTO (Yap_MkBigRatTerm, (MP_RAT *));
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MP_RAT *STD_PROTO (Yap_BigRatOfTerm, (Term));
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inline EXTERN void MPZ_SET (mpz_t, MP_INT *);
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inline EXTERN void
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MPZ_SET (mpz_t dest, MP_INT *src)
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{
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dest->_mp_size = src->_mp_size;
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dest->_mp_alloc = src->_mp_alloc;
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dest->_mp_d = src->_mp_d;
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}
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inline EXTERN int IsLargeIntTerm (Term);
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inline EXTERN int
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IsLargeIntTerm (Term t)
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{
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return (int) (IsApplTerm (t)
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&& ((FunctorOfTerm (t) <= FunctorBigInt)
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&& (FunctorOfTerm (t) >= FunctorLongInt)));
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}
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inline EXTERN UInt Yap_SizeOfBigInt (Term);
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inline EXTERN UInt
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Yap_SizeOfBigInt (Term t)
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{
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CELL *pt = RepAppl(t)+1;
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return 2+(sizeof(MP_INT)+
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(((MP_INT *)pt)->_mp_alloc*sizeof(mp_limb_t)))/sizeof(CELL);
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}
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#else
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inline EXTERN int IsLargeIntTerm (Term);
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inline EXTERN int
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IsLargeIntTerm (Term t)
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{
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return (int) (IsApplTerm (t) && FunctorOfTerm (t) == FunctorLongInt);
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}
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#endif
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typedef struct string_struct {
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UInt len;
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} blob_string_t;
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Term STD_PROTO (Yap_MkBlobStringTerm, (const char *, size_t len));
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Term STD_PROTO (Yap_MkBlobWideStringTerm, (const wchar_t *, size_t len));
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char *STD_PROTO (Yap_BlobStringOfTerm, (Term));
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wchar_t *STD_PROTO (Yap_BlobWideStringOfTerm, (Term));
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char *STD_PROTO (Yap_BlobStringOfTermAndLength, (Term, size_t *));
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inline EXTERN int IsBlobStringTerm (Term);
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inline EXTERN int
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IsBlobStringTerm (Term t)
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{
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return (int) (IsApplTerm (t) &&
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FunctorOfTerm (t) == FunctorBigInt &&
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(RepAppl(t)[1] & BLOB_STRING) == BLOB_STRING);
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}
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inline EXTERN int IsWideBlobStringTerm (Term);
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inline EXTERN int
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IsWideBlobStringTerm (Term t)
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{
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return (int) (IsApplTerm (t) &&
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FunctorOfTerm (t) == FunctorBigInt &&
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RepAppl(t)[1] == BLOB_WIDE_STRING);
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}
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/* extern Functor FunctorLongInt; */
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inline EXTERN int IsLargeNumTerm (Term);
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inline EXTERN int
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IsLargeNumTerm (Term t)
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{
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return (int) (IsApplTerm (t)
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&& ((FunctorOfTerm (t) <= FunctorDouble)
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&& (FunctorOfTerm (t) >= FunctorLongInt)));
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}
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inline EXTERN int IsExternalBlobTerm (Term, CELL);
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inline EXTERN int
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IsExternalBlobTerm (Term t, CELL tag)
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{
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return (int) (IsApplTerm (t) &&
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FunctorOfTerm (t) == FunctorBigInt &&
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RepAppl(t)[1] == tag);
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}
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inline EXTERN void *ExternalBlobFromTerm (Term);
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inline EXTERN void *
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ExternalBlobFromTerm (Term t)
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{
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MP_INT *base = (MP_INT *)(RepAppl(t)+2);
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return (void *) (base+1);
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}
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inline EXTERN int IsNumTerm (Term);
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inline EXTERN int
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IsNumTerm (Term t)
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{
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return (int) ((IsIntTerm (t) || IsLargeNumTerm (t)));
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}
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inline EXTERN Int IsAtomicTerm (Term);
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inline EXTERN Int
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IsAtomicTerm (Term t)
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{
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return (Int) (IsAtomOrIntTerm (t) || IsLargeNumTerm (t));
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}
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inline EXTERN Int IsExtensionFunctor (Functor);
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inline EXTERN Int
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IsExtensionFunctor (Functor f)
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{
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return (Int) (f <= FunctorDouble);
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}
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inline EXTERN Int IsBlobFunctor (Functor);
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inline EXTERN Int
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IsBlobFunctor (Functor f)
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{
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return (Int) ((f <= FunctorDouble && f >= FunctorDBRef));
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}
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inline EXTERN Int IsPrimitiveTerm (Term);
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inline EXTERN Int
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IsPrimitiveTerm (Term t)
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{
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return (Int) ((IsAtomOrIntTerm (t)
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|| (IsApplTerm (t) && IsBlobFunctor (FunctorOfTerm (t)))));
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}
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#ifdef TERM_EXTENSIONS
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inline EXTERN Int IsAttachFunc (Functor);
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inline EXTERN Int
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IsAttachFunc (Functor f)
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{
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return (Int) (FALSE);
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}
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inline EXTERN Int IsAttachedTerm (Term);
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inline EXTERN Int
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IsAttachedTerm (Term t)
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{
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return (Int) ((IsVarTerm (t) && IsAttVar(VarOfTerm(t))));
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}
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inline EXTERN Int GlobalIsAttachedTerm (Term);
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inline EXTERN Int
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GlobalIsAttachedTerm (Term t)
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{
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return (Int) ((IsVarTerm (t) && GlobalIsAttVar(VarOfTerm(t))));
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}
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inline EXTERN Int SafeIsAttachedTerm (Term);
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inline EXTERN Int
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SafeIsAttachedTerm (Term t)
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{
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return (Int) (IsVarTerm (t) && IsAttVar(VarOfTerm(t)));
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}
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inline EXTERN exts ExtFromCell (CELL *);
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inline EXTERN exts
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ExtFromCell (CELL * pt)
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{
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return attvars_ext;
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}
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#else
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inline EXTERN Int IsAttachFunc (Functor);
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inline EXTERN Int
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IsAttachFunc (Functor f)
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{
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return (Int) (FALSE);
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}
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inline EXTERN Int IsAttachedTerm (Term);
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inline EXTERN Int
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IsAttachedTerm (Term t)
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{
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return (Int) (FALSE);
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}
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#endif
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inline EXTERN int STD_PROTO (unify_extension, (Functor, CELL, CELL *, CELL));
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EXTERN int STD_PROTO (unify_extension, (Functor, CELL, CELL *, CELL));
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int STD_PROTO(Yap_gmp_tcmp_big_big,(Term, Term));
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inline EXTERN int
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unify_extension (Functor f, CELL d0, CELL * pt0, CELL d1)
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{
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switch (BlobOfFunctor (f))
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{
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case db_ref_e:
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return (d0 == d1);
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case attvar_e:
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return (d0 == d1);
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case long_int_e:
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return (pt0[1] == RepAppl (d1)[1]);
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case big_int_e:
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#ifdef USE_GMP
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return (Yap_gmp_tcmp_big_big(d0,d1) == 0);
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#else
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return d0 == d1;
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#endif /* USE_GMP */
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case double_e:
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{
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CELL *pt1 = RepAppl (d1);
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return (pt0[1] == pt1[1]
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#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
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&& pt0[2] == pt1[2]
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#endif
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);
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}
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}
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return (FALSE);
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}
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static inline
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CELL Yap_IntP_key(CELL *pt)
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{
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#ifdef USE_GMP
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if (((Functor)pt[-1] == FunctorBigInt)) {
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MP_INT *b1 = Yap_BigIntOfTerm(AbsAppl(pt-1));
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/* first cell in program */
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CELL val = ((CELL *)(b1+1))[0];
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return MkIntTerm(val & (MAX_ABS_INT-1));
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}
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#endif
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return MkIntTerm(pt[0] & (MAX_ABS_INT-1));
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}
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static inline
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CELL Yap_Int_key(Term t)
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{
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return Yap_IntP_key(RepAppl(t)+1);
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}
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static inline
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CELL Yap_DoubleP_key(CELL *pt)
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{
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#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
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CELL val = pt[0]^pt[1];
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#else
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CELL val = pt[0];
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#endif
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return MkIntTerm(val & (MAX_ABS_INT-1));
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}
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static inline
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CELL Yap_Double_key(Term t)
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{
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return Yap_DoubleP_key(RepAppl(t)+1);
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}
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