521 lines
13 KiB
C
521 lines
13 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 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: arith1.c *
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* Last rev: *
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* mods: *
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* comments: bignum support through gmp *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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/**
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* @file bignum.c
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* @author VITOR SANTOS COSTA <vsc@VITORs-MBP-2.lan>
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* @date Mon Apr 30 09:34:59 2018
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*
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* @brief BigNums and More
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* @namespace prolog
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*
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*
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*
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*/
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#include "Yap.h"
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#include "Yatom.h"
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#include "YapHeap.h"
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#include "YapText.h"
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#ifdef USE_GMP
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#include "YapEval.h"
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#include "alloc.h"
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Term Yap_MkBigIntTerm(MP_INT *big) {
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CACHE_REGS
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Int nlimbs;
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MP_INT *dst = (MP_INT *)(HR + 2);
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CELL *ret = HR;
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Int bytes;
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if (mpz_fits_slong_p(big)) {
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long int out = mpz_get_si(big);
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return MkIntegerTerm((Int)out);
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}
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// bytes = big->_mp_alloc * sizeof(mp_limb_t);
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// nlimbs = ALIGN_YAPTYPE(bytes,CELL)/CellSize;
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// this works, but it shouldn't need to do this...
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nlimbs = big->_mp_alloc;
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bytes = nlimbs * sizeof(CELL);
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if (nlimbs > (ASP - ret) - 1024) {
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return TermNil;
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}
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HR[0] = (CELL)FunctorBigInt;
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HR[1] = BIG_INT;
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dst->_mp_size = big->_mp_size;
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dst->_mp_alloc = nlimbs * (CellSize / sizeof(mp_limb_t));
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memmove((void *)(dst + 1), (const void *)(big->_mp_d), bytes);
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HR = (CELL *)(dst + 1) + nlimbs;
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HR[0] = EndSpecials;
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HR++;
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return AbsAppl(ret);
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}
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MP_INT *Yap_BigIntOfTerm(Term t) {
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MP_INT *new = (MP_INT *)(RepAppl(t) + 2);
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new->_mp_d = (mp_limb_t *)(new + 1);
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return (new);
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}
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Term Yap_MkBigRatTerm(MP_RAT *big) {
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CACHE_REGS
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Int nlimbs;
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MP_INT *dst = (MP_INT *)(HR + 2);
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MP_INT *num = mpq_numref(big);
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MP_INT *den = mpq_denref(big);
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MP_RAT *rat;
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CELL *ret = HR;
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if (mpz_cmp_si(den, 1) == 0)
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return Yap_MkBigIntTerm(num);
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if ((num->_mp_alloc + den->_mp_alloc) * (sizeof(mp_limb_t) / CellSize) >
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(ASP - ret) - 1024) {
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return TermNil;
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}
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HR[0] = (CELL)FunctorBigInt;
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HR[1] = BIG_RATIONAL;
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dst->_mp_size = 0;
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rat = (MP_RAT *)(dst + 1);
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rat->_mp_num._mp_size = num->_mp_size;
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rat->_mp_num._mp_alloc = num->_mp_alloc;
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nlimbs = (num->_mp_alloc) * (sizeof(mp_limb_t) / CellSize);
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memmove((void *)(rat + 1), (const void *)(num->_mp_d), nlimbs * CellSize);
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rat->_mp_den._mp_size = den->_mp_size;
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rat->_mp_den._mp_alloc = den->_mp_alloc;
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HR = (CELL *)(rat + 1) + nlimbs;
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nlimbs = (den->_mp_alloc) * (sizeof(mp_limb_t) / CellSize);
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memmove((void *)(HR), (const void *)(den->_mp_d), nlimbs * CellSize);
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HR += nlimbs;
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dst->_mp_alloc = (HR - (CELL *)(dst + 1));
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HR[0] = EndSpecials;
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HR++;
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return AbsAppl(ret);
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}
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MP_RAT *Yap_BigRatOfTerm(Term t) {
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MP_RAT *new = (MP_RAT *)(RepAppl(t) + 2 + sizeof(MP_INT) / sizeof(CELL));
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mp_limb_t *nt;
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nt = new->_mp_num._mp_d = (mp_limb_t *)(new + 1);
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nt += new->_mp_num._mp_alloc;
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new->_mp_den._mp_d = nt;
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return new;
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}
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Term Yap_RatTermToApplTerm(Term t) {
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Term ts[2];
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MP_RAT *rat = Yap_BigRatOfTerm(t);
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ts[0] = Yap_MkBigIntTerm(mpq_numref(rat));
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ts[1] = Yap_MkBigIntTerm(mpq_denref(rat));
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return Yap_MkApplTerm(FunctorRDiv, 2, ts);
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}
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#endif
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Term Yap_AllocExternalDataInStack(CELL tag, size_t bytes, void *pt) {
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CACHE_REGS
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Int nlimbs;
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MP_INT *dst = (MP_INT *)(HR + 2);
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CELL *ret = HR;
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CELL **blobp;
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nlimbs = ALIGN_BY_TYPE(bytes, CELL) / CellSize;
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if (nlimbs > (ASP - ret) - 1024) {
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return TermNil;
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}
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HR[0] = (CELL)FunctorBigInt;
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HR[1] = tag;
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dst->_mp_size = 0;
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dst->_mp_alloc = nlimbs;
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HR = (CELL *)(dst + 1) + nlimbs;
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HR[0] = EndSpecials;
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HR++;
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blobp = (CELL **)pt;
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*blobp = (CELL *)(dst + 1);
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return AbsAppl(ret);
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}
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int Yap_CleanOpaqueVariable(CELL d) {
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CELL blob_info, blob_tag;
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CELL *pt = RepAppl(HeadOfTerm(d));
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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blob_tag = pt[1];
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if (blob_tag < USER_BLOB_START || blob_tag >= USER_BLOB_END) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, AbsAppl(pt),
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"clean opaque: bad blob with tag " UInt_FORMAT, blob_tag);
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return FALSE;
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}
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blob_info = blob_tag;
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if (!GLOBAL_OpaqueHandlers)
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return false;
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if (!GLOBAL_OpaqueHandlers[blob_info].fail_handler)
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return true;
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return (GLOBAL_OpaqueHandlers[blob_info].fail_handler)(d);
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}
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YAP_Opaque_CallOnWrite Yap_blob_write_handler(Term t) {
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CELL blob_info, blob_tag;
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CELL *pt = RepAppl(t);
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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blob_tag = pt[1];
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if (blob_tag < USER_BLOB_START || blob_tag >= USER_BLOB_END) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, AbsAppl(pt),
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"clean opaque: bad blob with tag " UInt_FORMAT, blob_tag);
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return FALSE;
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}
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blob_info = blob_tag;
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if (!GLOBAL_OpaqueHandlers) {
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return NULL;
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}
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return GLOBAL_OpaqueHandlers[blob_info].write_handler;
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}
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YAP_Opaque_CallOnGCMark Yap_blob_gc_mark_handler(Term t) {
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CELL blob_info, blob_tag;
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CELL *pt = RepAppl(t);
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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blob_tag = pt[1];
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if (blob_tag < USER_BLOB_START || blob_tag >= USER_BLOB_END) {
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return NULL;
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}
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blob_info = blob_tag;
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if (!GLOBAL_OpaqueHandlers)
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return NULL;
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return GLOBAL_OpaqueHandlers[blob_info].mark_handler;
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}
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YAP_Opaque_CallOnGCRelocate Yap_blob_gc_relocate_handler(Term t) {
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CELL blob_info, blob_tag;
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CELL *pt = RepAppl(t);
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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blob_tag = pt[1];
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if (blob_tag < USER_BLOB_START || blob_tag >= USER_BLOB_END) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, AbsAppl(pt),
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"clean opaque: bad blob with tag " UInt_FORMAT, blob_tag);
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return FALSE;
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}
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blob_info = blob_tag;
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if (!GLOBAL_OpaqueHandlers)
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return NULL;
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return GLOBAL_OpaqueHandlers[blob_info].relocate_handler;
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}
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extern Int Yap_blob_tag(Term t) {
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CELL *pt = RepAppl(t);
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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return pt[1];
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}
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void *Yap_blob_info(Term t) {
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MP_INT *blobp;
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CELL *pt = RepAppl(t);
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#ifdef DEBUG
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/* sanity checking */
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if (pt[0] != (CELL)FunctorBigInt) {
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Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "CleanOpaqueVariable bad call");
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return FALSE;
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}
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#endif
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if (!GLOBAL_OpaqueHandlers)
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return FALSE;
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blobp = (MP_INT *)(pt + 2);
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return (void *)(blobp + 1);
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}
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Term Yap_MkULLIntTerm(YAP_ULONG_LONG n) {
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#if __GNUC__ && USE_GMP
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mpz_t new;
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char tmp[256];
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Term t;
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#ifdef _WIN32
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snprintf(tmp, 256, "%I64u", n);
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#elif HAVE_SNPRINTF
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snprintf(tmp, 256, "%llu", n);
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#else
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sprintf(tmp, "%llu", n);
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#endif
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/* try to scan it as a bignum */
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mpz_init_set_str(new, tmp, 10);
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if (mpz_fits_slong_p(new)) {
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CACHE_REGS
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return MkIntegerTerm(mpz_get_si(new));
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}
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t = Yap_MkBigIntTerm(new);
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mpz_clear(new);
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return t;
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#else
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CACHE_REGS
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return MkIntegerTerm(n);
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#endif
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}
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CELL *Yap_HeapStoreOpaqueTerm(Term t) {
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CELL *ptr = RepAppl(t);
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size_t sz;
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void *new;
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if (ptr[0] == (CELL)FunctorBigInt) {
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sz = sizeof(MP_INT) + 2 * CellSize +
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((MP_INT *)(ptr + 2))->_mp_alloc * sizeof(mp_limb_t);
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} else { /* string */
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sz = sizeof(CELL) * (2 + ptr[1]);
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}
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new = Yap_AllocCodeSpace(sz);
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if (!new) {
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Yap_Error(RESOURCE_ERROR_HEAP, TermNil,
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"subgoal_search_loop: no space for %s", StringOfTerm(t));
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} else {
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if (ptr[0] == (CELL)FunctorBigInt) {
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MP_INT *new = (MP_INT *)(RepAppl(t) + 2);
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new->_mp_d = (mp_limb_t *)(new + 1);
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}
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memmove(new, ptr, sz);
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}
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return new;
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}
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size_t Yap_OpaqueTermToString(Term t, char *str, size_t max) {
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size_t str_index = 0;
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CELL *li = RepAppl(t);
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unsigned char *ptr = (unsigned char *)StringOfTerm(AbsAppl(li));
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if (li[0] == (CELL)FunctorString) {
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str_index += sprintf(&str[str_index], "\"");
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do {
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utf8proc_int32_t chr;
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ptr += get_utf8(ptr, -1, &chr);
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if (chr == '\0')
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break;
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str_index += sprintf(str + str_index, "%C", chr);
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} while (TRUE);
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str_index += sprintf(str + str_index, "\"");
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} else {
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CELL big_tag = li[1];
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if (big_tag == ARRAY_INT || big_tag == ARRAY_FLOAT) {
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str_index += sprintf(&str[str_index], "{...}");
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#ifdef USE_GMP
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} else if (big_tag == BIG_INT) {
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MP_INT *big = Yap_BigIntOfTerm(AbsAppl(li));
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char *s = mpz_get_str(&str[str_index], 10, big);
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str_index += strlen(&s[str_index]);
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} else if (big_tag == BIG_RATIONAL) {
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MP_RAT *big = Yap_BigRatOfTerm(AbsAppl(li));
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char *s = mpq_get_str(&str[str_index], 10, big);
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str_index += strlen(&s[str_index]);
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#endif
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}
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/*
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else if (big_tag >= USER_BLOB_START && big_tag < USER_BLOB_END) {
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Opaque_CallOnWrite f;
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CELL blob_info;
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blob_info = big_tag - USER_BLOB_START;
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if (GLOBAL_OpaqueHandlers &&
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(f= GLOBAL_OpaqueHandlers[blob_info].write_handler)) {
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(f)(wglb->stream, big_tag, ExternalBlobFromTerm(t), 0);
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return;
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}
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} */
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str_index += sprintf(&str[str_index], "0");
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}
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return str_index;
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}
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static Int p_is_bignum(USES_REGS1) {
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#ifdef USE_GMP
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Term t = Deref(ARG1);
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return (IsNonVarTerm(t) && IsApplTerm(t) &&
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FunctorOfTerm(t) == FunctorBigInt && RepAppl(t)[1] == BIG_INT);
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#else
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return FALSE;
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#endif
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}
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static Int p_is_string(USES_REGS1) {
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Term t = Deref(ARG1);
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return (IsNonVarTerm(t) && IsApplTerm(t) &&
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FunctorOfTerm(t) == FunctorString);
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}
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static Int p_nb_set_bit(USES_REGS1) {
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#ifdef USE_GMP
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Term t = Deref(ARG1);
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Term ti = Deref(ARG2);
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Int i;
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if (!(IsNonVarTerm(t) && IsApplTerm(t) && FunctorOfTerm(t) == FunctorBigInt &&
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RepAppl(t)[1] == BIG_INT))
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return FALSE;
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if (!IsIntegerTerm(ti)) {
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return FALSE;
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}
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if (!IsIntegerTerm(ti)) {
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return FALSE;
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}
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i = IntegerOfTerm(ti);
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if (i < 0) {
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return FALSE;
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}
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Yap_gmp_set_bit(i, t);
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return TRUE;
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#else
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return FALSE;
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#endif
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}
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static Int p_has_bignums(USES_REGS1) {
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#ifdef USE_GMP
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return TRUE;
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#else
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return FALSE;
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#endif
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}
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static Int p_is_opaque(USES_REGS1) {
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Term t = Deref(ARG1);
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if (IsVarTerm(t))
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return FALSE;
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if (IsApplTerm(t)) {
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Functor f = FunctorOfTerm(t);
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CELL *pt;
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if (f != FunctorBigInt)
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return FALSE;
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pt = RepAppl(t);
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return (pt[1] != BIG_RATIONAL || pt[1] != BIG_INT);
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}
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return FALSE;
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}
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/** @pred rational( ?:T )
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Checks whether _T_ is a rational number.
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*/
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static Int p_is_rational(USES_REGS1) {
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Term t = Deref(ARG1);
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if (IsVarTerm(t))
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return FALSE;
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if (IsIntTerm(t))
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return TRUE;
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if (IsApplTerm(t)) {
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Functor f = FunctorOfTerm(t);
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CELL *pt;
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if (f == FunctorLongInt)
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return TRUE;
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if (f != FunctorBigInt)
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return FALSE;
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pt = RepAppl(t);
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return (pt[1] == BIG_RATIONAL || pt[1] == BIG_INT);
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}
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return FALSE;
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}
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static Int p_rational(USES_REGS1) {
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#ifdef USE_GMP
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Term t = Deref(ARG1);
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Functor f;
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CELL *pt;
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MP_RAT *rat;
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Term t1, t2;
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if (IsVarTerm(t))
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return FALSE;
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if (!IsApplTerm(t))
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return FALSE;
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f = FunctorOfTerm(t);
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if (f != FunctorBigInt)
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return FALSE;
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pt = RepAppl(t);
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if (pt[1] != BIG_RATIONAL)
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return FALSE;
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rat = Yap_BigRatOfTerm(t);
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while ((t1 = Yap_MkBigIntTerm(mpq_numref(rat))) == TermNil ||
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(t2 = Yap_MkBigIntTerm(mpq_denref(rat))) == TermNil) {
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UInt size = (mpq_numref(rat)->_mp_alloc) * (sizeof(mp_limb_t) / CellSize) +
|
|
(mpq_denref(rat)->_mp_alloc) * (sizeof(mp_limb_t) / CellSize);
|
|
if (!Yap_gcl(size, 3, ENV, P)) {
|
|
Yap_Error(RESOURCE_ERROR_STACK, t, LOCAL_ErrorMessage);
|
|
return FALSE;
|
|
}
|
|
}
|
|
return Yap_unify(ARG2, t1) && Yap_unify(ARG3, t2);
|
|
#else
|
|
return FALSE;
|
|
#endif
|
|
}
|
|
|
|
void Yap_InitBigNums(void) {
|
|
Yap_InitCPred("$has_bignums", 0, p_has_bignums, SafePredFlag);
|
|
Yap_InitCPred("$bignum", 1, p_is_bignum, SafePredFlag);
|
|
Yap_InitCPred("rational", 3, p_rational, 0);
|
|
Yap_InitCPred("rational", 1, p_is_rational, SafePredFlag);
|
|
Yap_InitCPred("string", 1, p_is_string, SafePredFlag);
|
|
Yap_InitCPred("opaque", 1, p_is_opaque, SafePredFlag);
|
|
Yap_InitCPred("nb_set_bit", 2, p_nb_set_bit, SafePredFlag);
|
|
}
|