1161 lines
28 KiB
C
1161 lines
28 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: write.c *
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* Last rev: *
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* mods: *
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* comments: Writing a Prolog Term *
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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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#include <stdlib.h>
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#include <math.h>
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#include "Yap.h"
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#include "Yatom.h"
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#include "YapHeap.h"
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#include "yapio.h"
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#include "clause.h"
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#if COROUTINING
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#include "attvar.h"
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_CTYPE_H
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#include <ctype.h>
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#endif
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/* describe the type of the previous term to have been written */
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typedef enum {
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separator, /* the previous term was a separator like ',', ')', ... */
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alphanum, /* the previous term was an atom or number */
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symbol /* the previous term was a symbol like +, -, *, .... */
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} wtype;
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typedef void *wrf;
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typedef struct union_slots {
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Int old;
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Int ptr;
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} uslots;
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typedef struct union_direct {
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Term old;
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CELL *ptr;
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} udirect;
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typedef struct rewind_term {
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struct rewind_term *parent;
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union {
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struct union_slots s;
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struct union_direct d;
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} u;
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} rwts;
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typedef struct write_globs {
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void *stream;
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int Quote_illegal, Ignore_ops, Handle_vars, Use_portray, Portray_delays;
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int Keep_terms;
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int Write_Loops;
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int Write_strings;
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int last_atom_minus;
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UInt MaxDepth, MaxArgs;
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wtype lw;
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} wglbs;
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#define lastw wglb->lw
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#define last_minus wglb->last_atom_minus
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STATIC_PROTO(void wrputn, (Int, struct write_globs *));
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STATIC_PROTO(void wrputf, (Float, struct write_globs *));
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STATIC_PROTO(void wrputref, (CODEADDR, int, struct write_globs *));
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STATIC_PROTO(int legalAtom, (unsigned char *));
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/*STATIC_PROTO(int LeftOpToProtect, (Atom, int));
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STATIC_PROTO(int RightOpToProtect, (Atom, int));*/
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STATIC_PROTO(wtype AtomIsSymbols, (unsigned char *));
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STATIC_PROTO(void putAtom, (Atom, int, struct write_globs *));
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STATIC_PROTO(void writeTerm, (Term, int, int, int, struct write_globs *, struct rewind_term *));
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#define wrputc(X,WF) Sputcode(X,WF) /* writes a character */
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/*
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protect bracket from merging with previoous character.
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avoid stuff like not (2,3) -> not(2,3) or
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*/
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static void
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wropen_bracket(struct write_globs *wglb, int protect)
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{
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wrf stream = wglb->stream;
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if (lastw != separator && protect)
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wrputc(' ', stream);
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wrputc('(', stream);
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lastw = separator;
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}
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static void
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wrclose_bracket(struct write_globs *wglb, int protect)
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{
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wrf stream = wglb->stream;
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wrputc(')', stream);
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lastw = separator;
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}
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static int
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protect_open_number(struct write_globs *wglb, int lm, int minus_required)
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{
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wrf stream = wglb->stream;
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if (lastw == symbol && lm && !minus_required) {
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wropen_bracket(wglb, TRUE);
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return TRUE;
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} else if (lastw == alphanum ||
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(lastw == symbol && minus_required)) {
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wrputc(' ', stream);
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}
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return FALSE;
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}
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static void
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protect_close_number(struct write_globs *wglb, int used_bracket)
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{
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if (used_bracket) {
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wrclose_bracket(wglb, TRUE);
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} else {
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lastw = alphanum;
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}
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last_minus = FALSE;
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}
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static void
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wrputn(Int n, struct write_globs *wglb) /* writes an integer */
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{
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wrf stream = wglb->stream;
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char s[256], *s1=s; /* that should be enough for most integers */
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int has_minus = (n < 0);
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int ob;
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ob = protect_open_number(wglb, last_minus, has_minus);
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#if HAVE_SNPRINTF
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snprintf(s, 256, Int_FORMAT, n);
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#else
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sprintf(s, Int_FORMAT, n);
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#endif
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while (*s1)
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wrputc(*s1++, stream);
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protect_close_number(wglb, ob);
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}
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#define wrputs(s, stream) Sfputs(s, stream)
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static void
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wrputws(wchar_t *s, wrf stream) /* writes a string */
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{
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while (*s)
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wrputc(*s++, stream);
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}
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#ifdef USE_GMP
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static char *
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ensure_space(size_t sz) {
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CACHE_REGS
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char *s;
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s = (char *) Yap_PreAllocCodeSpace();
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while (s+sz >= (char *)AuxSp) {
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#if USE_SYSTEM_MALLOC
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/* may require stack expansion */
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if (!Yap_ExpandPreAllocCodeSpace(sz, NULL, TRUE)) {
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s = NULL;
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break;
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}
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s = (char *) Yap_PreAllocCodeSpace();
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#else
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s = NULL;
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#endif
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}
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if (!s) {
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s = (char *)TR;
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while (s+sz >= LOCAL_TrailTop) {
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if (!Yap_growtrail(sz/sizeof(CELL), FALSE)) {
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s = NULL;
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break;
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}
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s = (char *)TR;
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}
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}
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if (!s) {
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s = (char *)H;
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if (s+sz >= (char *)ASP) {
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Yap_Error(OUT_OF_STACK_ERROR,TermNil,"not enough space to write bignum: it requires %d bytes", sz);
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s = NULL;
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}
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}
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return s;
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}
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static void
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write_mpint(MP_INT *big, struct write_globs *wglb) {
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char *s;
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int has_minus = mpz_sgn(big);
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int ob;
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s = ensure_space(3+mpz_sizeinbase(big, 10));
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ob = protect_open_number(wglb, last_minus, has_minus);
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if (!s) {
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s = mpz_get_str(NULL, 10, big);
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if (!s)
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return;
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wrputs(s,wglb->stream);
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free(s);
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} else {
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mpz_get_str(s, 10, big);
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wrputs(s,wglb->stream);
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}
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protect_close_number(wglb, ob);
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}
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#endif
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/* writes a bignum */
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static void
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writebig(Term t, int p, int depth, int rinfixarg, struct write_globs *wglb, struct rewind_term *rwt)
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{
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CELL *pt = RepAppl(t)+1;
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CELL big_tag = pt[0];
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#ifdef USE_GMP
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if (big_tag == BIG_INT)
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{
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MP_INT *big = Yap_BigIntOfTerm(t);
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write_mpint(big, wglb);
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return;
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} else if (big_tag == BIG_RATIONAL) {
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Term trat = Yap_RatTermToApplTerm(t);
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writeTerm(trat, p, depth, rinfixarg, wglb, rwt);
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return;
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}
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#endif
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if (big_tag == BLOB_STRING) {
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if (wglb->Write_strings)
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wrputc('`',wglb->stream);
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else
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wrputc('"',wglb->stream);
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wrputs(Yap_BlobStringOfTerm(t),wglb->stream);
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if (wglb->Write_strings)
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wrputc('`',wglb->stream);
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else
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wrputc('"',wglb->stream);
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return;
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} else if (big_tag == BLOB_WIDE_STRING) {
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wchar_t *s = Yap_BlobWideStringOfTerm(t);
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if (wglb->Write_strings)
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wrputc('`',wglb->stream);
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else
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wrputc('"', wglb->stream);
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while (*s) {
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wrputc(*s++, wglb->stream);
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}
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if (wglb->Write_strings)
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wrputc('`',wglb->stream);
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else
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wrputc('"',wglb->stream);
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return;
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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, (void *)((MP_INT *)(pt+1)), 0);
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}
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}
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wrputs("0",wglb->stream);
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}
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static void
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wrputf(Float f, struct write_globs *wglb) /* writes a float */
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{
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char s[256];
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wrf stream = wglb->stream;
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int sgn;
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int ob;
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#if HAVE_ISNAN || defined(__WIN32)
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if (isnan(f)) {
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wrputs("(nan)", stream);
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lastw = separator;
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return;
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}
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#endif
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sgn = (f < 0.0);
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#if HAVE_ISINF || defined(_WIN32)
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if (isinf(f)) {
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if (sgn) {
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wrputs("(-inf)", stream);
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} else {
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wrputs("(+inf)", stream);
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}
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lastw = separator;
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return;
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}
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#endif
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ob = protect_open_number(wglb, last_minus, sgn);
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#if THREADS
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/* old style writing */
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int found_dot = FALSE, found_exp = FALSE;
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char *pt = s;
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int ch;
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if (lastw == symbol || lastw == alphanum) {
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wrputc(' ', stream);
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}
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lastw = alphanum;
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// sprintf(s, "%.15g", f);
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sprintf(s, RepAtom(AtomFloatFormat)->StrOfAE, f);
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while (*pt == ' ')
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pt++;
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if (*pt == '-') {
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wrputc('-', stream);
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pt++;
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}
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while ((ch = *pt) != '\0') {
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switch (ch) {
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case '.':
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found_dot = TRUE;
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wrputc('.', stream);
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break;
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case 'e':
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case 'E':
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if (!found_dot) {
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found_dot = TRUE;
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wrputs(".0", stream);
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}
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found_exp = TRUE;
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default:
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wrputc(ch, stream);
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}
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pt++;
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}
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if (!found_dot) {
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wrputs(".0", stream);
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}
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#else
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char *format_float(double f, char *buf);
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char *buf;
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if (lastw == symbol || lastw == alphanum) {
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wrputc(' ', stream);
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}
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/* use SWI's format_float */
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buf = format_float(f, s);
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if (!buf) return;
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wrputs(buf, stream);
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#endif
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protect_close_number(wglb, ob);
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}
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/* writes a data base reference */
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static void
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wrputref(CODEADDR ref, int Quote_illegal, struct write_globs *wglb)
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{
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char s[256];
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wrf stream = wglb->stream;
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putAtom(AtomDBref, Quote_illegal, wglb);
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#if defined(__linux__) || defined(__APPLE__)
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sprintf(s, "(%p," UInt_FORMAT ")", ref, ((LogUpdClause*)ref)->ClRefCount);
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#else
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sprintf(s, "(0x%p," UInt_FORMAT ")", ref, ((LogUpdClause*)ref)->ClRefCount);
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#endif
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wrputs(s, stream);
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lastw = alphanum;
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}
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/* writes a blob (default) */
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static void
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wrputblob(CODEADDR ref, int Quote_illegal, struct write_globs *wglb)
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{
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char s[256];
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wrf stream = wglb->stream;
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putAtom(AtomSWIStream, Quote_illegal, wglb);
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#if defined(__linux__) || defined(__APPLE__)
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sprintf(s, "(%p)", ref);
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#else
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sprintf(s, "(0x%p)", ref);
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#endif
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wrputs(s, stream);
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lastw = alphanum;
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}
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static int
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legalAtom(unsigned char *s) /* Is this a legal atom ? */
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{
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wchar_t ch = *s;
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if (ch == '\0')
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return FALSE;
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if (Yap_chtype[ch] != LC) {
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if (ch == '[') {
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return (s[1] == ']' && !s[2]);
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} else if (ch == '{') {
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return (s[1] == '}' && !s[2]);
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} else if (Yap_chtype[ch] == SL) {
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return (!s[1]);
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} else if ((ch == ',' || ch == '.') && !s[1]) {
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return FALSE;
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} else {
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if (ch == '/') {
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if (s[1] == '*') return FALSE;
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}
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while (ch) {
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if (Yap_chtype[ch] != SY) {
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return FALSE;
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}
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ch = *++s;
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}
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}
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return TRUE;
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} else
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while ((ch = *++s) != 0)
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if (Yap_chtype[ch] > NU)
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return FALSE;
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return (TRUE);
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}
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static wtype
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AtomIsSymbols(unsigned char *s) /* Is this atom just formed by symbols ? */
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{
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int ch;
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if (Yap_chtype[(int)s[0]] == SL && s[1] == '\0')
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return(separator);
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while ((ch = *s++) != '\0') {
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if (Yap_chtype[ch] != SY)
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return alphanum;
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}
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return symbol;
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}
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static void
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write_quoted(int ch, int quote, wrf stream)
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{
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if (yap_flags[CHARACTER_ESCAPE_FLAG] == CPROLOG_CHARACTER_ESCAPES) {
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wrputc(ch, stream);
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if (ch == '\'')
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wrputc('\'', stream); /* be careful about quotes */
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return;
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}
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if (!(ch < 0xff && chtype(ch) == BS) && ch != '\'' && ch != '\\') {
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wrputc(ch, stream);
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} else {
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switch (ch) {
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case '\\':
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case '\'':
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wrputc('\\', stream);
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wrputc(ch, stream);
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break;
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case 7:
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wrputc('\\', stream);
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wrputc('a', stream);
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break;
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case '\b':
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wrputc('\\', stream);
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wrputc('b', stream);
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break;
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case '\t':
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wrputc('\\', stream);
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wrputc('t', stream);
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break;
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case ' ':
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case 160:
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wrputc(' ', stream);
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break;
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case '\n':
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wrputc('\\', stream);
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wrputc('n', stream);
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break;
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case 11:
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wrputc('\\', stream);
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wrputc('v', stream);
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break;
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case '\r':
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wrputc('\\', stream);
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wrputc('r', stream);
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break;
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case '\f':
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wrputc('\\', stream);
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wrputc('f', stream);
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break;
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default:
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if ( ch <= 0xff ) {
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char esc[8];
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if (yap_flags[CHARACTER_ESCAPE_FLAG] == SICSTUS_CHARACTER_ESCAPES) {
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sprintf(esc, "\\%03o", ch);
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} else {
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/* last backslash in ISO mode */
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sprintf(esc, "\\%03o\\", ch);
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}
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wrputs(esc, stream);
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}
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}
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}
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}
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/* writes an atom */
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static void
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putAtom(Atom atom, int Quote_illegal, struct write_globs *wglb)
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{
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unsigned char *s;
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wtype atom_or_symbol;
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wrf stream = wglb->stream;
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|
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if (IsBlob(atom)) {
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wrputblob((CODEADDR)RepAtom(atom),wglb->Quote_illegal,wglb);
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return;
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}
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if (IsWideAtom(atom)) {
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wchar_t *ws = RepAtom(atom)->WStrOfAE;
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|
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if (Quote_illegal) {
|
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wrputc('\'', stream);
|
|
while (*ws) {
|
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wchar_t ch = *ws++;
|
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write_quoted(ch, '\'', stream);
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}
|
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wrputc('\'', stream);
|
|
} else {
|
|
wrputws(ws, stream);
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}
|
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return;
|
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}
|
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s = (unsigned char *)RepAtom(atom)->StrOfAE;
|
|
/* #define CRYPT_FOR_STEVE 1*/
|
|
#ifdef CRYPT_FOR_STEVE
|
|
if (Yap_GetValue(AtomCryptAtoms) != TermNil && Yap_GetAProp(atom, OpProperty) == NIL) {
|
|
char s[16];
|
|
sprintf(s,"x%x", (CELL)s);
|
|
wrputs(s, stream);
|
|
return;
|
|
}
|
|
#endif
|
|
/* if symbol then last_minus is important */
|
|
last_minus = FALSE;
|
|
atom_or_symbol = AtomIsSymbols(s);
|
|
if (lastw == atom_or_symbol && atom_or_symbol != separator /* solo */)
|
|
wrputc(' ', stream);
|
|
lastw = atom_or_symbol;
|
|
if (Quote_illegal && !legalAtom(s)) {
|
|
wrputc('\'', stream);
|
|
while (*s) {
|
|
wchar_t ch = *s++;
|
|
write_quoted(ch, '\'', stream);
|
|
}
|
|
wrputc('\'', stream);
|
|
} else {
|
|
wrputs((char *)s, stream);
|
|
}
|
|
}
|
|
|
|
static int
|
|
IsStringTerm(Term string) /* checks whether this is a string */
|
|
{
|
|
if (IsVarTerm(string))
|
|
return FALSE;
|
|
do {
|
|
Term hd;
|
|
int ch;
|
|
|
|
if (!IsPairTerm(string)) return(FALSE);
|
|
hd = HeadOfTerm(string);
|
|
if (IsVarTerm(hd)) return(FALSE);
|
|
if (!IsIntTerm(hd)) return(FALSE);
|
|
ch = IntOfTerm(HeadOfTerm(string));
|
|
if ((ch < ' ' || ch > MAX_ISO_LATIN1) && ch != '\n' && ch != '\t')
|
|
return(FALSE);
|
|
string = TailOfTerm(string);
|
|
if (IsVarTerm(string)) return(FALSE);
|
|
} while (string != TermNil);
|
|
return(TRUE);
|
|
}
|
|
|
|
/* writes a string */
|
|
static void
|
|
putString(Term string, struct write_globs *wglb)
|
|
|
|
{
|
|
wrf stream = wglb->stream;
|
|
wrputc('"', stream);
|
|
while (string != TermNil) {
|
|
int ch = IntOfTerm(HeadOfTerm(string));
|
|
write_quoted(ch, '"', stream);
|
|
string = TailOfTerm(string);
|
|
}
|
|
wrputc('"', stream);
|
|
lastw = alphanum;
|
|
}
|
|
|
|
/* writes a string */
|
|
static void
|
|
putUnquotedString(Term string, struct write_globs *wglb)
|
|
|
|
{
|
|
wrf stream = wglb->stream;
|
|
while (string != TermNil) {
|
|
int ch = IntOfTerm(HeadOfTerm(string));
|
|
wrputc(ch, stream);
|
|
string = TailOfTerm(string);
|
|
}
|
|
lastw = alphanum;
|
|
}
|
|
|
|
|
|
static Term
|
|
from_pointer(CELL *ptr0, struct rewind_term *rwt, struct write_globs *wglb)
|
|
{
|
|
CACHE_REGS
|
|
Term t;
|
|
CELL *ptr = ptr0;
|
|
|
|
while (IsVarTerm(*ptr) && !IsUnboundVar(ptr))
|
|
ptr = (CELL *)*ptr;
|
|
t = *ptr;
|
|
if (wglb->Keep_terms) {
|
|
struct rewind_term *x = rwt->parent;
|
|
|
|
rwt->u.s.old = Yap_InitSlot(t PASS_REGS);
|
|
rwt->u.s.ptr = Yap_InitSlot((CELL)ptr0 PASS_REGS);
|
|
if (!IsAtomicTerm(t) && !IsVarTerm(t)) {
|
|
while (x) {
|
|
if (Yap_GetDerefedFromSlot(x->u.s.old PASS_REGS) == t)
|
|
return TermFoundVar;
|
|
x = x->parent;
|
|
}
|
|
}
|
|
} else {
|
|
rwt->u.d.old = t;
|
|
rwt->u.d.ptr = ptr0;
|
|
if (!IsAtomicTerm(t) && !IsVarTerm(t)) {
|
|
struct rewind_term *x = rwt->parent;
|
|
|
|
while (x) {
|
|
if (x->u.d.old == t)
|
|
return TermFoundVar;
|
|
x = x->parent;
|
|
}
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
static CELL *
|
|
restore_from_write(struct rewind_term *rwt, struct write_globs *wglb)
|
|
{
|
|
CACHE_REGS
|
|
CELL *ptr;
|
|
|
|
if (wglb->Keep_terms) {
|
|
ptr = (CELL*)Yap_GetPtrFromSlot(rwt->u.s.ptr PASS_REGS);
|
|
Yap_RecoverSlots(2 PASS_REGS);
|
|
} else {
|
|
ptr = rwt->u.d.ptr;
|
|
}
|
|
rwt->u.s.ptr = 0;
|
|
return ptr;
|
|
}
|
|
|
|
/* writes an unbound variable */
|
|
static void
|
|
write_var(CELL *t, struct write_globs *wglb, struct rewind_term *rwt)
|
|
{
|
|
CACHE_REGS
|
|
if (lastw == alphanum) {
|
|
wrputc(' ', wglb->stream);
|
|
}
|
|
wrputc('_', wglb->stream);
|
|
/* make sure we don't get no creepy spaces where they shouldn't be */
|
|
lastw = separator;
|
|
if (IsAttVar(t)) {
|
|
Int vcount = (t-H0);
|
|
if (wglb->Portray_delays) {
|
|
exts ext = ExtFromCell(t);
|
|
struct rewind_term nrwt;
|
|
nrwt.parent = rwt;
|
|
nrwt.u.s.ptr = 0;
|
|
|
|
wglb->Portray_delays = FALSE;
|
|
if (ext == attvars_ext) {
|
|
attvar_record *attv = RepAttVar(t);
|
|
CELL *l = &attv->Value; /* dirty low-level hack, check atts.h */
|
|
|
|
wrputs("$AT(",wglb->stream);
|
|
write_var(t, wglb, rwt);
|
|
wrputc(',', wglb->stream);
|
|
writeTerm(from_pointer(l, &nrwt, wglb), 999, 1, FALSE, wglb, &nrwt);
|
|
l = restore_from_write(&nrwt, wglb);
|
|
wrputc(',', wglb->stream);
|
|
l ++;
|
|
writeTerm(from_pointer(l, &nrwt, wglb), 999, 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
wglb->Portray_delays = TRUE;
|
|
return;
|
|
}
|
|
wrputc('D', wglb->stream);
|
|
wrputn(vcount,wglb);
|
|
} else {
|
|
wrputn(((Int) (t- H0)),wglb);
|
|
}
|
|
}
|
|
|
|
static Term
|
|
check_infinite_loop(Term t, struct rewind_term *x, struct write_globs *wglb)
|
|
{
|
|
CACHE_REGS
|
|
if (wglb->Keep_terms) {
|
|
while (x) {
|
|
if (Yap_GetFromSlot(x->u.s.old PASS_REGS) == t)
|
|
return TermFoundVar;
|
|
x = x->parent;
|
|
}
|
|
} else {
|
|
while (x) {
|
|
if (x->u.d.old == t)
|
|
return TermFoundVar;
|
|
x = x->parent;
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
static void
|
|
write_list(Term t, int direction, int depth, struct write_globs *wglb, struct rewind_term *rwt)
|
|
{
|
|
CACHE_REGS
|
|
Term ti;
|
|
struct rewind_term nrwt;
|
|
nrwt.parent = rwt;
|
|
nrwt.u.s.ptr = 0;
|
|
|
|
while (1) {
|
|
int ndirection;
|
|
int do_jump;
|
|
|
|
writeTerm(from_pointer(RepPair(t), &nrwt, wglb), 999, depth+1, FALSE, wglb, &nrwt);
|
|
t = AbsPair(restore_from_write(&nrwt, wglb));
|
|
ti = TailOfTerm(t);
|
|
if (IsVarTerm(ti))
|
|
break;
|
|
if (!IsPairTerm(ti) ||
|
|
!IsPairTerm((ti = check_infinite_loop(ti, rwt, wglb))))
|
|
break;
|
|
ndirection = RepPair(ti)-RepPair(t);
|
|
/* make sure we're not trapped in loops */
|
|
if (ndirection > 0) {
|
|
do_jump = (direction <= 0);
|
|
} else if (ndirection == 0) {
|
|
wrputc(',', wglb->stream);
|
|
putAtom(AtomFoundVar, wglb->Quote_illegal, wglb);
|
|
lastw = separator;
|
|
return;
|
|
} else {
|
|
do_jump = (direction >= 0);
|
|
}
|
|
if (wglb->MaxDepth != 0 && depth > wglb->MaxDepth) {
|
|
wrputc('|', wglb->stream);
|
|
putAtom(Atom3Dots, wglb->Quote_illegal, wglb);
|
|
return;
|
|
}
|
|
lastw = separator;
|
|
direction = ndirection;
|
|
depth++;
|
|
if (do_jump)
|
|
break;
|
|
wrputc(',', wglb->stream);
|
|
t = ti;
|
|
}
|
|
if (IsPairTerm(ti)) {
|
|
Term nt = from_pointer(RepPair(t)+1, &nrwt, wglb);
|
|
/* we found an infinite loop */
|
|
if (IsAtomTerm(nt)) {
|
|
wrputc('|', wglb->stream);
|
|
writeTerm(nt, 999, depth, FALSE, wglb, rwt);
|
|
} else {
|
|
/* keep going on the list */
|
|
wrputc(',', wglb->stream);
|
|
write_list(nt, direction, depth, wglb, &nrwt);
|
|
}
|
|
restore_from_write(&nrwt, wglb);
|
|
} else if (ti != MkAtomTerm(AtomNil)) {
|
|
wrputc('|', wglb->stream);
|
|
lastw = separator;
|
|
writeTerm(from_pointer(RepPair(t)+1, &nrwt, wglb), 999, depth, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
writeTerm(Term t, int p, int depth, int rinfixarg, struct write_globs *wglb, struct rewind_term *rwt)
|
|
/* term to write */
|
|
/* context priority */
|
|
|
|
{
|
|
CACHE_REGS
|
|
struct rewind_term nrwt;
|
|
nrwt.parent = rwt;
|
|
nrwt.u.s.ptr = 0;
|
|
|
|
if (wglb->MaxDepth != 0 && depth > wglb->MaxDepth) {
|
|
putAtom(Atom3Dots, wglb->Quote_illegal, wglb);
|
|
return;
|
|
}
|
|
if (EX)
|
|
return;
|
|
t = Deref(t);
|
|
if (IsVarTerm(t)) {
|
|
write_var((CELL *)t, wglb, &nrwt);
|
|
} else if (IsIntTerm(t)) {
|
|
wrputn((Int) IntOfTerm(t),wglb);
|
|
} else if (IsAtomTerm(t)) {
|
|
putAtom(AtomOfTerm(t), wglb->Quote_illegal, wglb);
|
|
} else if (IsPairTerm(t)) {
|
|
if (wglb->Ignore_ops) {
|
|
wrputs("'.'(",wglb->stream);
|
|
lastw = separator;
|
|
writeTerm(from_pointer(RepPair(t), &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
t = AbsPair(restore_from_write(&nrwt, wglb));
|
|
wrputs(",",wglb->stream);
|
|
writeTerm(from_pointer(RepPair(t)+1, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrclose_bracket(wglb, TRUE);
|
|
return;
|
|
}
|
|
if (wglb->Use_portray) {
|
|
Term targs[1];
|
|
struct DB_TERM *old_EX = NULL;
|
|
Int sl = 0;
|
|
|
|
targs[0] = t;
|
|
Yap_PutValue(AtomPortray, MkAtomTerm(AtomNil));
|
|
if (EX) old_EX = EX;
|
|
sl = Yap_InitSlot(t PASS_REGS);
|
|
Yap_execute_goal(Yap_MkApplTerm(FunctorPortray, 1, targs), 0, 1);
|
|
t = Yap_GetFromSlot(sl PASS_REGS);
|
|
Yap_RecoverSlots(1 PASS_REGS);
|
|
if (old_EX != NULL) EX = old_EX;
|
|
if (Yap_GetValue(AtomPortray) == MkAtomTerm(AtomTrue))
|
|
return;
|
|
}
|
|
if (yap_flags[WRITE_QUOTED_STRING_FLAG] && IsStringTerm(t)) {
|
|
putString(t, wglb);
|
|
} else {
|
|
wrputc('[', wglb->stream);
|
|
lastw = separator;
|
|
/* we assume t was already saved in the stack */
|
|
write_list(t, 0, depth, wglb, rwt);
|
|
wrputc(']', wglb->stream);
|
|
lastw = separator;
|
|
}
|
|
} else { /* compound term */
|
|
Functor functor = FunctorOfTerm(t);
|
|
int Arity;
|
|
Atom atom;
|
|
int op, lp, rp;
|
|
|
|
if (IsExtensionFunctor(functor)) {
|
|
switch((CELL)functor) {
|
|
case (CELL)FunctorDouble:
|
|
wrputf(FloatOfTerm(t),wglb);
|
|
return;
|
|
case (CELL)FunctorAttVar:
|
|
write_var(RepAppl(t)+1, wglb, &nrwt);
|
|
return;
|
|
case (CELL)FunctorDBRef:
|
|
wrputref(RefOfTerm(t), wglb->Quote_illegal, wglb);
|
|
return;
|
|
case (CELL)FunctorLongInt:
|
|
wrputn(LongIntOfTerm(t),wglb);
|
|
return;
|
|
/* case (CELL)FunctorBigInt: */
|
|
default:
|
|
writebig(t, p, depth, rinfixarg, wglb, rwt);
|
|
return;
|
|
}
|
|
}
|
|
Arity = ArityOfFunctor(functor);
|
|
atom = NameOfFunctor(functor);
|
|
#ifdef SFUNC
|
|
if (Arity == SFArity) {
|
|
int argno = 1;
|
|
CELL *p = ArgsOfSFTerm(t);
|
|
putAtom(atom, wglb->Quote_illegal, wglb);
|
|
wropen_bracket(wglb, FALSE);
|
|
lastw = separator;
|
|
while (*p) {
|
|
Int sl = 0;
|
|
|
|
while (argno < *p) {
|
|
wrputc('_', wglb->stream), wrputc(',', wglb->stream);
|
|
++argno;
|
|
}
|
|
*p++;
|
|
lastw = separator;
|
|
/* cannot use the term directly with the SBA */
|
|
writeTerm(from_pointer(p, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
p = restore_from_write(&nrwt, wglb)+1;
|
|
if (*p)
|
|
wrputc(',', wglb->stream);
|
|
argno++;
|
|
}
|
|
wrclose_bracket(wglb, TRUE);
|
|
return;
|
|
}
|
|
#endif
|
|
if (wglb->Use_portray) {
|
|
Term targs[1];
|
|
struct DB_TERM *old_EX = NULL;
|
|
Int sl = 0;
|
|
|
|
targs[0] = t;
|
|
Yap_PutValue(AtomPortray, MkAtomTerm(AtomNil));
|
|
if (EX) old_EX = EX;
|
|
sl = Yap_InitSlot(t PASS_REGS);
|
|
Yap_execute_goal(Yap_MkApplTerm(FunctorPortray, 1, targs),0, 1);
|
|
t = Yap_GetFromSlot(sl PASS_REGS);
|
|
Yap_RecoverSlots(1 PASS_REGS);
|
|
if (old_EX) EX = old_EX;
|
|
if (Yap_GetValue(AtomPortray) == MkAtomTerm(AtomTrue) || EX)
|
|
return;
|
|
}
|
|
if (!wglb->Ignore_ops &&
|
|
Arity == 1 &&
|
|
Yap_IsPrefixOp(atom, &op, &rp)
|
|
) {
|
|
Term tright = ArgOfTerm(1, t);
|
|
int bracket_right =
|
|
!IsVarTerm(tright) && IsAtomTerm(tright) &&
|
|
Yap_IsOp(AtomOfTerm(tright));
|
|
if (op > p) {
|
|
wropen_bracket(wglb, TRUE);
|
|
}
|
|
putAtom(atom, wglb->Quote_illegal, wglb);
|
|
if (bracket_right) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
wropen_bracket(wglb, TRUE);
|
|
} else if (atom == AtomMinus) {
|
|
last_minus = TRUE;
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), rp, depth + 1, TRUE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (bracket_right) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
if (op > p) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
} else if (!wglb->Ignore_ops &&
|
|
Arity == 1 &&
|
|
Yap_IsPosfixOp(atom, &op, &lp)) {
|
|
Term tleft = ArgOfTerm(1, t);
|
|
|
|
int bracket_left =
|
|
!IsVarTerm(tleft) &&
|
|
IsAtomTerm(tleft) &&
|
|
Yap_IsOp(AtomOfTerm(tleft));
|
|
if (op > p) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
wropen_bracket(wglb, TRUE);
|
|
}
|
|
if (bracket_left) {
|
|
wropen_bracket(wglb, TRUE);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), lp, depth + 1, rinfixarg, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (bracket_left) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
putAtom(atom, wglb->Quote_illegal, wglb);
|
|
if (op > p) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
} else if (!wglb->Ignore_ops &&
|
|
Arity == 2 && Yap_IsInfixOp(atom, &op, &lp,
|
|
&rp) ) {
|
|
Term tleft = ArgOfTerm(1, t);
|
|
Term tright = ArgOfTerm(2, t);
|
|
int bracket_left =
|
|
!IsVarTerm(tleft) && IsAtomTerm(tleft) &&
|
|
Yap_IsOp(AtomOfTerm(tleft));
|
|
int bracket_right =
|
|
!IsVarTerm(tright) && IsAtomTerm(tright) &&
|
|
Yap_IsOp(AtomOfTerm(tright));
|
|
|
|
if (op > p) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
wropen_bracket(wglb, TRUE);
|
|
lastw = separator;
|
|
}
|
|
if (bracket_left) {
|
|
wropen_bracket(wglb, TRUE);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), lp, depth + 1, rinfixarg, wglb, &nrwt);
|
|
t = AbsAppl(restore_from_write(&nrwt, wglb)-1);
|
|
if (bracket_left) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
/* avoid quoting commas and bars */
|
|
if (!strcmp(RepAtom(atom)->StrOfAE,",")) {
|
|
wrputc(',', wglb->stream);
|
|
lastw = separator;
|
|
} else if (!strcmp(RepAtom(atom)->StrOfAE,"|")) {
|
|
wrputc('|', wglb->stream);
|
|
lastw = separator;
|
|
} else
|
|
putAtom(atom, wglb->Quote_illegal, wglb);
|
|
if (bracket_right) {
|
|
wropen_bracket(wglb, TRUE);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+2, &nrwt, wglb), rp, depth + 1, TRUE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (bracket_right) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
if (op > p) {
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
} else if (wglb->Handle_vars && functor == LOCAL_FunctorVar) {
|
|
Term ti = ArgOfTerm(1, t);
|
|
if (lastw == alphanum) {
|
|
wrputc(' ', wglb->stream);
|
|
}
|
|
if (!IsVarTerm(ti) && (IsIntTerm(ti) || IsStringTerm(ti) || IsAtomTerm(ti))) {
|
|
if (IsIntTerm(ti)) {
|
|
Int k = IntOfTerm(ti);
|
|
if (k == -1) {
|
|
wrputc('_', wglb->stream);
|
|
lastw = alphanum;
|
|
return;
|
|
} else {
|
|
wrputc((k % 26) + 'A', wglb->stream);
|
|
if (k >= 26) {
|
|
/* make sure we don't get confused about our context */
|
|
lastw = separator;
|
|
wrputn( k / 26 ,wglb);
|
|
} else
|
|
lastw = alphanum;
|
|
}
|
|
} else if (IsAtomTerm(ti)) {
|
|
putAtom(AtomOfTerm(ti), FALSE, wglb);
|
|
} else {
|
|
putUnquotedString(ti, wglb);
|
|
}
|
|
} else {
|
|
wrputs("'$VAR'(",wglb->stream);
|
|
lastw = separator;
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
} else if (!wglb->Ignore_ops && functor == FunctorBraces) {
|
|
wrputc('{', wglb->stream);
|
|
lastw = separator;
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), 1200, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrputc('}', wglb->stream);
|
|
lastw = separator;
|
|
} else if (atom == AtomArray) {
|
|
wrputc('{', wglb->stream);
|
|
lastw = separator;
|
|
for (op = 1; op <= Arity; ++op) {
|
|
if (op == wglb->MaxArgs) {
|
|
wrputs("...", wglb->stream);
|
|
break;
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+op, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
t = AbsAppl(restore_from_write(&nrwt, wglb)-op);
|
|
if (op != Arity) {
|
|
wrputc(',', wglb->stream);
|
|
lastw = separator;
|
|
}
|
|
}
|
|
wrputc('}', wglb->stream);
|
|
lastw = separator;
|
|
} else {
|
|
putAtom(atom, wglb->Quote_illegal, wglb);
|
|
lastw = separator;
|
|
wropen_bracket(wglb, FALSE);
|
|
for (op = 1; op <= Arity; ++op) {
|
|
if (op == wglb->MaxArgs) {
|
|
wrputc('.', wglb->stream);
|
|
wrputc('.', wglb->stream);
|
|
wrputc('.', wglb->stream);
|
|
break;
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+op, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (op != Arity) {
|
|
wrputc(',', wglb->stream);
|
|
lastw = separator;
|
|
}
|
|
}
|
|
wrclose_bracket(wglb, TRUE);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
Yap_plwrite(Term t, void *mywrite, int max_depth, int flags, int priority)
|
|
/* term to be written */
|
|
/* consumer */
|
|
/* write options */
|
|
{
|
|
struct write_globs wglb;
|
|
struct rewind_term rwt;
|
|
|
|
if (!mywrite)
|
|
wglb.stream = Serror;
|
|
else
|
|
wglb.stream = mywrite;
|
|
|
|
wglb.lw = separator;
|
|
wglb.last_atom_minus = FALSE;
|
|
wglb.Quote_illegal = flags & Quote_illegal_f;
|
|
wglb.Handle_vars = flags & Handle_vars_f;
|
|
wglb.Use_portray = flags & Use_portray_f;
|
|
wglb.Portray_delays = flags & AttVar_Portray_f;
|
|
wglb.MaxDepth = max_depth;
|
|
wglb.MaxArgs = max_depth;
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
wglb.Keep_terms = (flags & (Use_portray_f|To_heap_f));
|
|
/* initialise wglb */
|
|
rwt.parent = NULL;
|
|
wglb.Ignore_ops = flags & Ignore_ops_f;
|
|
wglb.Write_strings = flags & BackQuote_String_f;
|
|
/* protect slots for portray */
|
|
writeTerm(from_pointer(&t, &rwt, &wglb), priority, 1, FALSE, &wglb, &rwt);
|
|
restore_from_write(&rwt, &wglb);
|
|
}
|
|
|