770 lines
15 KiB
C
Executable File
770 lines
15 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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/**
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@file TermExt.h
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@page Extensions Extensions to Prolog
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YAP includes a number of extensions over the original Prolog
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language. Next, we discuss support to the most important ones.
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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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double_e = 3 * sizeof (Functor *),
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long_int_e = 4 * sizeof (Functor *),
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big_int_e = 5 * sizeof (Functor *),
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string_e = 6 * 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 FunctorDouble ((Functor)(double_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 FunctorString ((Functor)(string_e))
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#define EndSpecials (string_e+sizeof(Functor *))
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#include "inline-only.h"
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#define IsAttVar(pt) __IsAttVar((pt) PASS_REGS)
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INLINE_ONLY inline EXTERN int __IsAttVar (CELL *pt USES_REGS);
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INLINE_ONLY inline EXTERN int
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__IsAttVar (CELL *pt USES_REGS)
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{
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#ifdef YAP_H
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return (pt)[-1] == (CELL)attvar_e
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&& pt < HR;
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#else
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return (pt)[-1] == (CELL)attvar_e;
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#endif
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}
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INLINE_ONLY inline EXTERN int GlobalIsAttVar (CELL *pt);
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INLINE_ONLY 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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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_ONLY inline EXTERN blob_type BlobOfFunctor (Functor f);
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INLINE_ONLY inline EXTERN blob_type
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BlobOfFunctor (Functor f)
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{
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return (blob_type) ((CELL)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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#ifdef YAP_H
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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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#endif /* YAP_H */
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INLINE_ONLY inline EXTERN Float CpFloatUnaligned(CELL *ptr);
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#define MkFloatTerm(fl) __MkFloatTerm((fl) PASS_REGS)
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INLINE_ONLY inline EXTERN Term __MkFloatTerm (Float USES_REGS);
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INLINE_ONLY inline EXTERN Float FloatOfTerm (Term t);
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#if SIZEOF_DOUBLE == SIZEOF_INT_P
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INLINE_ONLY inline EXTERN Term
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__MkFloatTerm (Float dbl USES_REGS)
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{
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return (Term) ((HR[0] = (CELL) FunctorDouble, *(Float *) (HR + 1) =
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dbl, HR[2] = EndSpecials, HR +=
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3, AbsAppl (HR - 3)));
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}
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INLINE_ONLY 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_ONLY 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_INT_P
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#define DOUBLE_ALIGNED(ADDR) ((CELL)(ADDR) & 0x4)
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INLINE_ONLY EXTERN inline void
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AlignGlobalForDouble( USES_REGS1 );
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INLINE_ONLY EXTERN inline void
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AlignGlobalForDouble( USES_REGS1 )
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{
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/* Force Alignment for floats. Note that garbage collector may
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break the alignment; */
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if (!DOUBLE_ALIGNED(HR)) {
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RESET_VARIABLE(HR);
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HR++;
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}
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}
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#ifdef i386
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INLINE_ONLY 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_ONLY 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_ONLY inline EXTERN Term
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__MkFloatTerm (Float dbl USES_REGS)
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{
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return (Term) ((AlignGlobalForDouble ( PASS_REGS1 ), HR[0] =
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(CELL) FunctorDouble, *(Float *) (HR + 1) = dbl, HR[3] =
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EndSpecials, HR +=
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4, AbsAppl (HR - 4)));
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}
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INLINE_ONLY 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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OOPS
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#endif
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#endif
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#ifndef YAP_H
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#include <stddef.h>
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#endif
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INLINE_ONLY inline EXTERN int IsFloatTerm (Term);
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INLINE_ONLY 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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#define MkLongIntTerm(i) __MkLongIntTerm((i) PASS_REGS)
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INLINE_ONLY inline EXTERN Term __MkLongIntTerm (Int USES_REGS);
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INLINE_ONLY inline EXTERN Term
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__MkLongIntTerm (Int i USES_REGS)
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{
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HR[0] = (CELL) FunctorLongInt;
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HR[1] = (CELL) (i);
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HR[2] = EndSpecials;
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HR += 3;
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return AbsAppl(HR - 3);
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}
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INLINE_ONLY inline EXTERN Int LongIntOfTerm (Term t);
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INLINE_ONLY 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_ONLY inline EXTERN int IsLongIntTerm (Term);
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INLINE_ONLY 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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/****************************************************/
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/*********** strings, coded as UTF-8 ****************/
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#include <string.h>
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/* extern Functor FunctorString; */
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#define MkStringTerm(i) __MkStringTerm((i) PASS_REGS)
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INLINE_ONLY inline EXTERN Term __MkStringTerm (const char *s USES_REGS);
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INLINE_ONLY inline EXTERN Term
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__MkStringTerm (const char *s USES_REGS)
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{
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Term t = AbsAppl(HR);
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size_t sz = ALIGN_BY_TYPE(strlen(s)+1,CELL);
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HR[0] = (CELL) FunctorString;
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HR[1] = (CELL) sz;
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strcpy((char *)(HR+2), s);
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HR[2+sz] = EndSpecials;
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HR += 3+sz;
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return t;
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}
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INLINE_ONLY inline EXTERN const char *StringOfTerm (Term t);
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INLINE_ONLY inline EXTERN const char *
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StringOfTerm (Term t)
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{
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return (const char *) (RepAppl (t)+2);
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}
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INLINE_ONLY inline EXTERN int IsStringTerm (Term);
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INLINE_ONLY inline EXTERN int
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IsStringTerm (Term t)
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{
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return (int) (IsApplTerm (t) && FunctorOfTerm (t) == FunctorString);
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}
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/****************************************************/
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#ifdef USE_GMP
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#include <stdio.h>
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#ifdef __cplusplus
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#include <gmpxx.h>
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#else
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#include <gmp.h>
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#endif
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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_ONLY inline EXTERN int IsBigIntTerm (Term);
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INLINE_ONLY 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 Yap_MkBigIntTerm(MP_INT *);
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MP_INT *Yap_BigIntOfTerm(Term);
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Term Yap_MkBigRatTerm(MP_RAT *);
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MP_RAT *Yap_BigRatOfTerm(Term);
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INLINE_ONLY inline EXTERN void MPZ_SET (mpz_t, MP_INT *);
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INLINE_ONLY 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_ONLY inline EXTERN int IsLargeIntTerm (Term);
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INLINE_ONLY 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_ONLY inline EXTERN UInt Yap_SizeOfBigInt (Term);
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INLINE_ONLY 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_ONLY inline EXTERN int IsLargeIntTerm (Term);
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INLINE_ONLY 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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/* extern Functor FunctorLongInt; */
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INLINE_ONLY inline EXTERN int IsLargeNumTerm (Term);
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INLINE_ONLY 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) <= FunctorBigInt)
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&& (FunctorOfTerm (t) >= FunctorDouble)));
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}
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INLINE_ONLY inline EXTERN int IsExternalBlobTerm (Term, CELL);
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INLINE_ONLY 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_ONLY inline EXTERN void *ExternalBlobFromTerm (Term);
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INLINE_ONLY 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_ONLY inline EXTERN int IsNumTerm (Term);
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INLINE_ONLY 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_ONLY inline EXTERN Int IsAtomicTerm (Term);
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INLINE_ONLY 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_ONLY inline EXTERN Int IsExtensionFunctor (Functor);
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INLINE_ONLY inline EXTERN Int
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IsExtensionFunctor (Functor f)
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{
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return (Int) (f <= FunctorString);
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}
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INLINE_ONLY inline EXTERN Int IsBlobFunctor (Functor);
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INLINE_ONLY inline EXTERN Int
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IsBlobFunctor (Functor f)
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{
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return (Int) ((f <= FunctorString && f >= FunctorDBRef));
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}
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INLINE_ONLY inline EXTERN Int IsPrimitiveTerm (Term);
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INLINE_ONLY 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_ONLY inline EXTERN Int IsAttachFunc (Functor);
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INLINE_ONLY inline EXTERN Int
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IsAttachFunc (Functor f)
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{
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return (Int) (FALSE);
|
|
}
|
|
|
|
|
|
|
|
#define IsAttachedTerm(t) __IsAttachedTerm(t PASS_REGS)
|
|
|
|
INLINE_ONLY inline EXTERN Int __IsAttachedTerm (Term USES_REGS);
|
|
|
|
INLINE_ONLY inline EXTERN Int
|
|
__IsAttachedTerm (Term t USES_REGS)
|
|
{
|
|
return (Int) ((IsVarTerm (t) && IsAttVar(VarOfTerm(t))));
|
|
}
|
|
|
|
INLINE_ONLY inline EXTERN Int GlobalIsAttachedTerm (Term);
|
|
|
|
INLINE_ONLY inline EXTERN Int
|
|
GlobalIsAttachedTerm (Term t)
|
|
{
|
|
return (Int) ((IsVarTerm (t) && GlobalIsAttVar(VarOfTerm(t))));
|
|
}
|
|
|
|
#define SafeIsAttachedTerm(t) __SafeIsAttachedTerm((t) PASS_REGS)
|
|
|
|
INLINE_ONLY inline EXTERN Int __SafeIsAttachedTerm (Term USES_REGS);
|
|
|
|
INLINE_ONLY inline EXTERN Int
|
|
__SafeIsAttachedTerm (Term t USES_REGS)
|
|
{
|
|
return (Int) (IsVarTerm (t) && IsAttVar(VarOfTerm(t)));
|
|
}
|
|
|
|
INLINE_ONLY inline EXTERN exts ExtFromCell (CELL *);
|
|
|
|
INLINE_ONLY inline EXTERN exts
|
|
ExtFromCell (CELL * pt)
|
|
{
|
|
return attvars_ext;
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
INLINE_ONLY inline EXTERN Int IsAttachFunc (Functor);
|
|
|
|
INLINE_ONLY inline EXTERN Int
|
|
IsAttachFunc (Functor f)
|
|
{
|
|
return (Int) (FALSE);
|
|
}
|
|
|
|
|
|
|
|
|
|
INLINE_ONLY inline EXTERN Int IsAttachedTerm (Term);
|
|
|
|
INLINE_ONLY inline EXTERN Int
|
|
IsAttachedTerm (Term t)
|
|
{
|
|
return (Int) (FALSE);
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
INLINE_ONLY inline EXTERN Int Yap_BlobTag(Term t);
|
|
|
|
INLINE_ONLY inline EXTERN Int Yap_BlobTag(Term t)
|
|
{
|
|
CELL *pt = RepAppl(t);
|
|
|
|
return pt[1];
|
|
}
|
|
|
|
|
|
INLINE_ONLY inline EXTERN void *Yap_BlobInfo(Term t);
|
|
|
|
INLINE_ONLY inline EXTERN void *Yap_BlobInfo(Term t)
|
|
{
|
|
MP_INT *blobp;
|
|
CELL *pt = RepAppl(t);
|
|
|
|
blobp = (MP_INT *)(pt+2);
|
|
return (void *)(blobp+1);
|
|
}
|
|
|
|
#ifdef YAP_H
|
|
|
|
INLINE_ONLY inline EXTERN int unify_extension(Functor, CELL, CELL *, CELL);
|
|
|
|
EXTERN int unify_extension(Functor, CELL, CELL *, CELL);
|
|
|
|
int Yap_gmp_tcmp_big_big(Term, Term);
|
|
|
|
INLINE_ONLY inline EXTERN int
|
|
unify_extension (Functor f, CELL d0, CELL * pt0, CELL d1)
|
|
{
|
|
switch (BlobOfFunctor (f))
|
|
{
|
|
case db_ref_e:
|
|
return (d0 == d1);
|
|
case attvar_e:
|
|
return (d0 == d1);
|
|
case long_int_e:
|
|
return (pt0[1] == RepAppl (d1)[1]);
|
|
case string_e:
|
|
return strcmp( (char *)(pt0+2), (char *)(RepAppl (d1)+2) ) == 0;
|
|
case big_int_e:
|
|
#ifdef USE_GMP
|
|
return (Yap_gmp_tcmp_big_big(d0,d1) == 0);
|
|
#else
|
|
return d0 == d1;
|
|
#endif /* USE_GMP */
|
|
case double_e:
|
|
{
|
|
CELL *pt1 = RepAppl (d1);
|
|
return (pt0[1] == pt1[1]
|
|
#if SIZEOF_DOUBLE == 2*SIZEOF_INT_P
|
|
&& pt0[2] == pt1[2]
|
|
#endif
|
|
);
|
|
}
|
|
}
|
|
return (FALSE);
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_IntP_key(CELL *pt)
|
|
{
|
|
#ifdef USE_GMP
|
|
if (((Functor)pt[-1] == FunctorBigInt)) {
|
|
MP_INT *b1 = Yap_BigIntOfTerm(AbsAppl(pt-1));
|
|
/* first cell in program */
|
|
CELL val = ((CELL *)(b1+1))[0];
|
|
return MkIntTerm(val & (MAX_ABS_INT-1));
|
|
}
|
|
#endif
|
|
return MkIntTerm(pt[0] & (MAX_ABS_INT-1));
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_Int_key(Term t)
|
|
{
|
|
return Yap_IntP_key(RepAppl(t)+1);
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_DoubleP_key(CELL *pt)
|
|
{
|
|
#if SIZEOF_DOUBLE1 == 2*SIZEOF_INT_P
|
|
CELL val = pt[0]^pt[1];
|
|
#else
|
|
CELL val = pt[0];
|
|
#endif
|
|
return MkIntTerm(val & (MAX_ABS_INT-1));
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_Double_key(Term t)
|
|
{
|
|
return Yap_DoubleP_key(RepAppl(t)+1);
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_StringP_key(CELL *pt)
|
|
{
|
|
UInt n = pt[1], i;
|
|
CELL val = pt[2];
|
|
for (i=1; i<n; i++) {
|
|
val ^= pt[i+1];
|
|
}
|
|
return MkIntTerm(val & (MAX_ABS_INT-1));
|
|
}
|
|
|
|
static inline
|
|
CELL Yap_String_key(Term t)
|
|
{
|
|
return Yap_StringP_key(RepAppl(t)+1);
|
|
}
|
|
|
|
#endif
|