102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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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 1985-2014 *
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* *
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*************************************************************************/
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/**
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@file swi.h
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@defgroup swi-c-interface SWI-Prolog Foreign Language Interface
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*
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* @tableofcontents
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*
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* A reimplementation of Jan Wielemaker's SWI-Prolog C-language interface, it supports
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* most of the functionality in the original implementation. It allows for:
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*
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* - Term Construction, Access, and Unification
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* - Manipulation of Atoms, Strings, Lists of Codes and Lists of Atoms
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* - Query evaluation
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* - Thread and Prolog engine management
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* - Data-Base Access
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*
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* In this interface, all Prolog data known by C is referenced through term references (term_t), hence
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* Prolog has all the information necessary to perform its memory management without special precautions
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* from the C programmer.
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@{
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*/
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void Yap_swi_install(void);
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void Yap_install_blobs(void);
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typedef struct open_query_struct {
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int q_open;
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int q_state;
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YAP_Term *q_g;
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PredEntry *q_pe;
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yamop *q_p, *q_cp;
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jmp_buf q_env;
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int q_flags;
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YAP_dogoalinfo q_h;
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struct open_query_struct *oq;
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} open_query;
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#define addr_hash(V) (((CELL) (V)) >> 4 & (N_SWI_HASH-1))
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static inline void
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add_to_hash(Int i, ADDR key)
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{
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UInt h = addr_hash(key);
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while (SWI_ReverseHash[h].key) {
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h = (h+1)%N_SWI_HASH;
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}
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SWI_ReverseHash[h].key = key;
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SWI_ReverseHash[h].pos = i;
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}
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static atom_t
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in_hash(ADDR key)
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{
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UInt h = addr_hash(key);
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while (SWI_ReverseHash[h].key) {
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if (SWI_ReverseHash[h].key == key)
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return SWI_ReverseHash[h].pos;
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h = (h+1)%N_SWI_HASH;
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}
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return 0;
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}
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static inline Term
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SWIModuleToModule(module_t m)
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{
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CACHE_REGS
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if (m)
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return MkAtomTerm(m->AtomOfME);
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if (CurrentModule)
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return CurrentModule;
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return USER_MODULE;
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}
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static inline functor_t
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FunctorToSWIFunctor(Functor at)
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{
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atom_t ats;
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if ((ats = in_hash((ADDR)at)))
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return (functor_t)((CELL)ats*4+2);
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return (functor_t)at;
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}
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#define isDefinedProcedure(pred) TRUE // TBD
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/**
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@}
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*/
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