1016 lines
25 KiB
C
1016 lines
25 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 "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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#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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static wtype lastw;
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typedef int (*wrf) (int, wchar_t);
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typedef struct union_slots {
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long old;
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long 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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wrf writewch;
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int Quote_illegal, Ignore_ops, Handle_vars, Use_portray;
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int keep_terms;
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int Write_Loops;
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UInt MaxDepth, MaxArgs;
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} wglbs;
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STATIC_PROTO(void wrputn, (Int, wrf));
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STATIC_PROTO(void wrputs, (char *, wrf));
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STATIC_PROTO(void wrputf, (Float, wrf));
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STATIC_PROTO(void wrputref, (CODEADDR, int, wrf));
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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, wrf));
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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) ((*WF)(Yap_c_output_stream,X)) /* writes a character */
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static void
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wrputn(Int n, wrf writewch) /* writes an integer */
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{
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char s[256], *s1=s; /* that should be enough for most integers */
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if (n < 0) {
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if (lastw == symbol)
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wrputc(' ', writewch);
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} else {
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if (lastw == alphanum)
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wrputc(' ', writewch);
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}
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#if HAVE_SNPRINTF
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#if SHORT_INTS
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snprintf(s, 256, "%ld", n);
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#else
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snprintf(s, 256, "%d", n);
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#endif
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#else
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#if SHORT_INTS
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sprintf(s, "%ld", n);
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#else
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sprintf(s, "%d", n);
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#endif
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#endif
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while (*s1)
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wrputc(*s1++, writewch);
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lastw = alphanum;
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}
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static void
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wrputs(char *s, wrf writewch) /* writes a string */
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{
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while (*s) {
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wrputc((unsigned char)(*s++), writewch);
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}
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}
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static void
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wrputws(wchar_t *s, wrf writewch) /* writes a string */
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{
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while (*s)
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wrputc(*s++, writewch);
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}
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static void
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wrputf(Float f, wrf writewch) /* writes a float */
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{
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char s[256], *pt = s, ch;
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if (f < 0) {
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if (lastw == symbol)
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wrputc(' ', writewch);
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} else {
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if (lastw == alphanum)
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wrputc(' ', writewch);
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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 == 'i' || *pt == 'n') /* inf or nan */ {
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wrputc('(', writewch);
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wrputc('+', writewch);
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wrputs(pt, writewch);
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wrputc(')', writewch);
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} else {
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wrputs(pt, writewch);
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}
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if (*pt == '-') pt++;
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while ((ch = *pt) != '\0') {
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if (ch < '0' || ch > '9')
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return;
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pt++;
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}
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wrputs(".0", writewch);
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}
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static void
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wrputref(CODEADDR ref, int Quote_illegal, wrf writewch) /* writes a data base reference */
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{
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char s[256];
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putAtom(AtomDBref, Quote_illegal, writewch);
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#if defined(__linux__) || defined(__APPLE__)
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sprintf(s, "(%p,0)", ref);
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#else
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sprintf(s, "(0x%p,0)", ref);
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#endif
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wrputs(s, writewch);
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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 == ']' && !(*++s));
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else if (ch == '{')
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return (*++s == '}' && !(*++s));
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else if (Yap_chtype[ch] == SL)
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return (!*++s);
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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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while (ch) {
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if (Yap_chtype[ch] != SY)
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return FALSE;
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ch = *++s;
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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 int LeftOpToProtect(Atom at, int p)
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{
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return Yap_IsOpMaxPrio(at) > p;
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}
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static int RightOpToProtect(Atom at, int p)
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{
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return Yap_IsOpMaxPrio(at) > p;
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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 writewch)
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{
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if (yap_flags[CHARACTER_ESCAPE_FLAG] == CPROLOG_CHARACTER_ESCAPES) {
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wrputc(ch, writewch);
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if (ch == '\'')
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wrputc('\'', writewch); /* 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, writewch);
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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('\\', writewch);
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wrputc(ch, writewch);
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break;
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case 7:
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wrputc('\\', writewch);
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wrputc('a', writewch);
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break;
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case '\b':
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wrputc('\\', writewch);
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wrputc('b', writewch);
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break;
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case '\t':
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wrputc('\\', writewch);
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wrputc('t', writewch);
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break;
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case ' ':
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case 160:
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wrputc(' ', writewch);
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break;
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case '\n':
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wrputc('\\', writewch);
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wrputc('n', writewch);
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break;
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case 11:
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wrputc('\\', writewch);
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wrputc('v', writewch);
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break;
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case '\r':
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wrputc('\\', writewch);
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wrputc('r', writewch);
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break;
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case '\f':
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wrputc('\\', writewch);
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wrputc('f', writewch);
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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, writewch);
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}
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}
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}
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}
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static void
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putAtom(Atom atom, int Quote_illegal, wrf writewch) /* writes an atom */
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{
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unsigned char *s = (unsigned char *)RepAtom(atom)->StrOfAE;
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wtype atom_or_symbol = AtomIsSymbols(s);
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/* #define CRYPT_FOR_STEVE 1*/
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#ifdef CRYPT_FOR_STEVE
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if (Yap_GetValue(AtomCryptAtoms) != TermNil && Yap_GetAProp(atom, OpProperty) == NIL) {
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char s[16];
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sprintf(s,"x%x", (CELL)s);
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wrputs(s, writewch);
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return;
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}
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#endif
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if (IsWideAtom(atom)) {
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wchar_t *ws = (wchar_t *)s;
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if (Quote_illegal) {
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wrputc('\'', writewch);
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while (*ws) {
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wchar_t ch = *ws++;
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write_quoted(ch, '\'', writewch);
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}
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wrputc('\'', writewch);
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} else {
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wrputws(ws, writewch);
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}
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return;
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}
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if (lastw == atom_or_symbol && atom_or_symbol != separator /* solo */)
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wrputc(' ', writewch);
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lastw = atom_or_symbol;
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if (!legalAtom(s) && Quote_illegal) {
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wrputc('\'', writewch);
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while (*s) {
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wchar_t ch = *s++;
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write_quoted(ch, '\'', writewch);
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}
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wrputc('\'', writewch);
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} else {
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wrputs((char *)s, writewch);
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}
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}
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static int
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IsStringTerm(Term string) /* checks whether this is a string */
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{
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if (IsVarTerm(string))
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return FALSE;
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do {
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Term hd;
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int ch;
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if (!IsPairTerm(string)) return(FALSE);
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hd = HeadOfTerm(string);
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if (IsVarTerm(hd)) return(FALSE);
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if (!IsIntTerm(hd)) return(FALSE);
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ch = IntOfTerm(HeadOfTerm(string));
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if ((ch < ' ' || ch > MAX_ISO_LATIN1) && ch != '\n' && ch != '\t')
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return(FALSE);
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string = TailOfTerm(string);
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if (IsVarTerm(string)) return(FALSE);
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} while (string != TermNil);
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return(TRUE);
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}
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static void
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putString(Term string, wrf writewch) /* writes a string */
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{
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wrputc('"', writewch);
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while (string != TermNil) {
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int ch = IntOfTerm(HeadOfTerm(string));
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write_quoted(ch, '"', writewch);
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string = TailOfTerm(string);
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}
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wrputc('"', writewch);
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lastw = alphanum;
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}
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static void
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putUnquotedString(Term string, wrf writewch) /* writes a string */
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{
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while (string != TermNil) {
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int ch = IntOfTerm(HeadOfTerm(string));
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wrputc(ch, writewch);
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string = TailOfTerm(string);
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}
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lastw = alphanum;
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}
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static void
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write_var(CELL *t, struct write_globs *wglb, struct rewind_term *rwt)
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{
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if (lastw == alphanum) {
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wrputc(' ', wglb->writewch);
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}
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wrputc('_', wglb->writewch);
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/* make sure we don't get no creepy spaces where they shouldn't be */
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lastw = separator;
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if (CellPtr(t) < H0) {
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Int vcount = (H0-t);
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#if COROUTINING
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#if DEBUG
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if (Yap_Portray_delays) {
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exts ext = ExtFromCell(t);
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Yap_Portray_delays = FALSE;
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if (ext == attvars_ext) {
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attvar_record *attv = (attvar_record *)t;
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long sl = 0;
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Term l = attv->Atts;
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wrputs("$AT(",wglb->writewch);
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write_var(t, wglb, rwt);
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wrputc(',', wglb->writewch);
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if (wglb->keep_terms) {
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/* garbage collection may be called */
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sl = Yap_InitSlot((CELL)attv);
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}
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writeTerm((Term)&(attv->Value), 999, 1, FALSE, wglb, rwt);
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wrputc(',', wglb->writewch);
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writeTerm(l, 999, 1, FALSE, wglb, rwt);
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if (wglb->keep_terms) {
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attv = (attvar_record *)Yap_GetFromSlot(sl);
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Yap_RecoverSlots(1);
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}
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wrputc(')', wglb->writewch);
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}
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Yap_Portray_delays = TRUE;
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return;
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}
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#endif
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wrputc('D', wglb->writewch);
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wrputn(vcount,wglb->writewch);
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#endif
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} else {
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wrputn(((Int) (t- H0)),wglb->writewch);
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}
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}
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static Term
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from_pointer(CELL *ptr, struct rewind_term *rwt, struct write_globs *wglb)
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{
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Term t;
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while (IsVarTerm(*ptr) && !IsUnboundVar(ptr))
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ptr = (CELL *)*ptr;
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t = *ptr;
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if (!IsVarTerm(t)) {
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if (wglb->keep_terms) {
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rwt->u.s.old = Yap_InitSlot(t);
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rwt->u.s.ptr = Yap_InitSlot((CELL)ptr);
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} else {
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rwt->u.d.old = t;
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rwt->u.d.ptr = ptr;
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}
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*ptr = TermFoundVar;
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}
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return t;
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}
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static void
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restore_from_write(struct rewind_term *rwt, struct write_globs *wglb)
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{
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Term t;
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if (rwt->u.s.ptr) {
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CELL *ptr;
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if (wglb->keep_terms) {
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ptr = (CELL *)Yap_GetPtrFromSlot(rwt->u.s.ptr);
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t = Yap_GetPtrFromSlot(rwt->u.s.old);
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Yap_RecoverSlots(2);
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} else {
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ptr = rwt->u.d.ptr;
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t = rwt->u.d.old;
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}
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*ptr = t;
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}
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rwt->u.s.ptr = 0;
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}
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static void
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write_list(Term t, int direction, int depth, struct write_globs *wglb, struct rewind_term *rwt)
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{
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Term ti;
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struct rewind_term nrwt;
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nrwt.parent = rwt;
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nrwt.u.s.ptr = 0;
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while (1) {
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long sl= 0;
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int ndirection;
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int do_jump;
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if (wglb->keep_terms) {
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/* garbage collection may be called */
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sl = Yap_InitSlot(t);
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}
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writeTerm(from_pointer(RepPair(t), &nrwt, wglb), 999, depth+1, FALSE, wglb, &nrwt);
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restore_from_write(&nrwt, wglb);
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if (wglb->keep_terms) {
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t = Yap_GetFromSlot(sl);
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Yap_RecoverSlots(1);
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}
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ti = TailOfTerm(t);
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if (IsVarTerm(ti))
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break;
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if (!IsPairTerm(ti))
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break;
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ndirection = RepPair(ti)-RepPair(t);
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/* make sure we're not trapped in loops */
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if (ndirection > 0) {
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do_jump = (direction < 0);
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} else if (ndirection == 0) {
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wrputc(',', wglb->writewch);
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putAtom(AtomFoundVar, wglb->Quote_illegal, wglb->writewch);
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lastw = separator;
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return;
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} else {
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do_jump = (direction > 0);
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}
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if (wglb->MaxDepth != 0 && depth > wglb->MaxDepth) {
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wrputc('|', wglb->writewch);
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putAtom(Atom3Dots, wglb->Quote_illegal, wglb->writewch);
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return;
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}
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wrputc(',', wglb->writewch);
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lastw = separator;
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direction = ndirection;
|
|
depth++;
|
|
if (do_jump)
|
|
break;
|
|
t = ti;
|
|
}
|
|
if (IsPairTerm(ti)) {
|
|
write_list(from_pointer(RepPair(t)+1, &nrwt, wglb), direction, depth, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
} else if (ti != MkAtomTerm(AtomNil)) {
|
|
wrputc('|', wglb->writewch);
|
|
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 */
|
|
|
|
{
|
|
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->writewch);
|
|
return;
|
|
}
|
|
if (EX != 0)
|
|
return;
|
|
t = Deref(t);
|
|
if (IsVarTerm(t)) {
|
|
write_var((CELL *)t, wglb, &nrwt);
|
|
} else if (IsIntTerm(t)) {
|
|
wrputn((Int) IntOfTerm(t),wglb->writewch);
|
|
} else if (IsAtomTerm(t)) {
|
|
putAtom(AtomOfTerm(t), wglb->Quote_illegal, wglb->writewch);
|
|
} else if (IsPairTerm(t)) {
|
|
if (wglb->Use_portray) {
|
|
Term targs[1];
|
|
Term old_EX = 0L;
|
|
long sl = 0;
|
|
|
|
targs[0] = t;
|
|
Yap_PutValue(AtomPortray, MkAtomTerm(AtomNil));
|
|
if (EX != 0L) old_EX = EX;
|
|
sl = Yap_InitSlot(t);
|
|
Yap_execute_goal(Yap_MkApplTerm(FunctorPortray, 1, targs), 0, 1);
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
if (old_EX != 0L) EX = old_EX;
|
|
if (Yap_GetValue(AtomPortray) == MkAtomTerm(AtomTrue))
|
|
return;
|
|
}
|
|
if (yap_flags[WRITE_QUOTED_STRING_FLAG] && IsStringTerm(t)) {
|
|
putString(t, wglb->writewch);
|
|
} else {
|
|
Term ls = t;
|
|
wrputc('[', wglb->writewch);
|
|
lastw = separator;
|
|
write_list(from_pointer(&ls, &nrwt, wglb), 0, depth, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrputc(']', wglb->writewch);
|
|
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->writewch);
|
|
return;
|
|
case (CELL)FunctorDBRef:
|
|
wrputref(RefOfTerm(t), wglb->Quote_illegal, wglb->writewch);
|
|
return;
|
|
case (CELL)FunctorLongInt:
|
|
wrputn(LongIntOfTerm(t),wglb->writewch);
|
|
return;
|
|
case (CELL)FunctorBigInt:
|
|
#ifdef USE_GMP
|
|
{
|
|
MP_INT *big = Yap_BigIntOfTerm(t);
|
|
char *s;
|
|
s = (char *) Yap_PreAllocCodeSpace();
|
|
while (s+3+mpz_sizeinbase(big, 10) >= (char *)AuxSp) {
|
|
#if USE_SYSTEM_MALLOC
|
|
/* may require stack expansion */
|
|
if (!Yap_ExpandPreAllocCodeSpace(3+mpz_sizeinbase(big, 10), NULL, TRUE)) {
|
|
s = NULL;
|
|
break;
|
|
}
|
|
s = (char *) Yap_PreAllocCodeSpace();
|
|
#else
|
|
s = NULL;
|
|
#endif
|
|
}
|
|
if (!s) {
|
|
s = (char *)TR;
|
|
while (s+3+mpz_sizeinbase(big, 10) >= Yap_TrailTop) {
|
|
if (!Yap_growtrail((3+mpz_sizeinbase(big, 10))/sizeof(CELL), FALSE)) {
|
|
s = NULL;
|
|
break;
|
|
}
|
|
s = (char *)TR;
|
|
}
|
|
}
|
|
if (!s) {
|
|
s = (char *)H;
|
|
if (s+3+mpz_sizeinbase(big, 10) >= (char *)ASP) {
|
|
Yap_Error(OUT_OF_STACK_ERROR,TermNil,"not enough space to write bignum: it requires %d bytes", 3+mpz_sizeinbase(big, 10));
|
|
s = NULL;
|
|
}
|
|
}
|
|
if (mpz_sgn(big) < 0) {
|
|
if (lastw == symbol)
|
|
wrputc(' ', wglb->writewch);
|
|
} else {
|
|
if (lastw == alphanum)
|
|
wrputc(' ', wglb->writewch);
|
|
}
|
|
if (!s) {
|
|
s = mpz_get_str(NULL, 10, big);
|
|
if (!s)
|
|
return;
|
|
wrputs(s,wglb->writewch);
|
|
free(s);
|
|
} else {
|
|
mpz_get_str(s, 10, big);
|
|
wrputs(s,wglb->writewch);
|
|
}
|
|
}
|
|
#else
|
|
{
|
|
wrputs("0",wglb->writewch);
|
|
}
|
|
#endif
|
|
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->writewch);
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
while (*p) {
|
|
long sl = 0;
|
|
|
|
while (argno < *p) {
|
|
wrputc('_', wglb->writewch), wrputc(',', wglb->writewch);
|
|
++argno;
|
|
}
|
|
*p++;
|
|
lastw = separator;
|
|
/* cannot use the term directly with the SBA */
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot((CELL)p);
|
|
}
|
|
writeTerm(from_pointer(p++, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
p = (CELL *)Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
if (*p)
|
|
wrputc(',', wglb->writewch);
|
|
argno++;
|
|
}
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
return;
|
|
}
|
|
#endif
|
|
if (wglb->Use_portray) {
|
|
Term targs[1];
|
|
Term old_EX = 0L;
|
|
long sl = 0;
|
|
|
|
targs[0] = t;
|
|
Yap_PutValue(AtomPortray, MkAtomTerm(AtomNil));
|
|
if (EX != 0L) old_EX = EX;
|
|
sl = Yap_InitSlot(t);
|
|
Yap_execute_goal(Yap_MkApplTerm(FunctorPortray, 1, targs),0, 1);
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
if (old_EX != 0L) EX = old_EX;
|
|
if (Yap_GetValue(AtomPortray) == MkAtomTerm(AtomTrue) || EX != 0L)
|
|
return;
|
|
}
|
|
if (!wglb->Ignore_ops &&
|
|
Arity == 1 && Yap_IsPrefixOp(atom, &op, &rp)
|
|
#ifdef DO_NOT_WRITE_PLUS_AND_MINUS_AS_PREFIX
|
|
&&
|
|
/* never write '+' and '-' as infix
|
|
operators */
|
|
( (RepAtom(atom)->StrOfAE[0] != '+' &&
|
|
RepAtom(atom)->StrOfAE[0] != '-') ||
|
|
RepAtom(atom)->StrOfAE[1] )
|
|
#endif /* DO_NOT_WRITE_PLUS_AND_MINUS_AS_PREFIX */
|
|
) {
|
|
Term tright = ArgOfTerm(1, t);
|
|
int bracket_right =
|
|
!IsVarTerm(tright) && IsAtomTerm(tright) &&
|
|
RightOpToProtect(AtomOfTerm(tright), rp);
|
|
if (op > p) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
if (lastw != separator && !rinfixarg)
|
|
wrputc(' ', wglb->writewch);
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
putAtom(atom, wglb->Quote_illegal, wglb->writewch);
|
|
if (bracket_right) {
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), rp, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (bracket_right) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (op > p) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
} else if (!wglb->Ignore_ops &&
|
|
Arity == 1 &&
|
|
Yap_IsPosfixOp(atom, &op, &lp)) {
|
|
Term tleft = ArgOfTerm(1, t);
|
|
long sl = 0;
|
|
int bracket_left =
|
|
!IsVarTerm(tleft) && IsAtomTerm(tleft) &&
|
|
LeftOpToProtect(AtomOfTerm(tleft), lp);
|
|
if (op > p) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
if (lastw != separator && !rinfixarg)
|
|
wrputc(' ', wglb->writewch);
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (bracket_left) {
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot(t);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), lp, depth + 1, rinfixarg, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
if (bracket_left) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
putAtom(atom, wglb->Quote_illegal, wglb->writewch);
|
|
if (op > p) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
} else if (!wglb->Ignore_ops &&
|
|
Arity == 2 && Yap_IsInfixOp(atom, &op, &lp,
|
|
&rp) ) {
|
|
Term tleft = ArgOfTerm(1, t);
|
|
Term tright = ArgOfTerm(2, t);
|
|
long sl = 0;
|
|
int bracket_left =
|
|
!IsVarTerm(tleft) && IsAtomTerm(tleft) &&
|
|
LeftOpToProtect(AtomOfTerm(tleft), lp);
|
|
int bracket_right =
|
|
!IsVarTerm(tright) && IsAtomTerm(tright) &&
|
|
RightOpToProtect(AtomOfTerm(tright), rp);
|
|
|
|
if (op > p) {
|
|
/* avoid stuff such as \+ (a,b) being written as \+(a,b) */
|
|
if (lastw != separator && !rinfixarg)
|
|
wrputc(' ', wglb->writewch);
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (bracket_left) {
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot(t);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), lp, depth + 1, rinfixarg, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
if (bracket_left) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
/* avoid quoting commas */
|
|
if (strcmp(RepAtom(atom)->StrOfAE,","))
|
|
putAtom(atom, wglb->Quote_illegal, wglb->writewch);
|
|
else {
|
|
wrputc(',', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (bracket_right) {
|
|
wrputc('(', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+2, &nrwt, wglb), rp, depth + 1, TRUE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (bracket_right) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
if (op > p) {
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
} else if (wglb->Handle_vars && functor == FunctorVar) {
|
|
Term ti = ArgOfTerm(1, t);
|
|
if (lastw == alphanum) {
|
|
wrputc(' ', wglb->writewch);
|
|
}
|
|
if (!IsVarTerm(ti) && (IsIntTerm(ti) || IsStringTerm(ti))) {
|
|
if (IsIntTerm(ti)) {
|
|
Int k = IntOfTerm(ti);
|
|
if (k == -1) {
|
|
wrputc('_', wglb->writewch);
|
|
lastw = alphanum;
|
|
return;
|
|
} else {
|
|
wrputc((k % 26) + 'A', wglb->writewch);
|
|
if (k >= 26) {
|
|
/* make sure we don't get confused about our context */
|
|
lastw = separator;
|
|
wrputn( k / 26 ,wglb->writewch);
|
|
} else
|
|
lastw = alphanum;
|
|
}
|
|
} else {
|
|
putUnquotedString(ti, wglb->writewch);
|
|
}
|
|
} else {
|
|
long sl = 0;
|
|
|
|
wrputs("'$VAR'(",wglb->writewch);
|
|
lastw = separator;
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot(t);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
} else if (!wglb->Ignore_ops && functor == FunctorBraces) {
|
|
wrputc('{', wglb->writewch);
|
|
lastw = separator;
|
|
writeTerm(from_pointer(RepAppl(t)+1, &nrwt, wglb), 1200, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
wrputc('}', wglb->writewch);
|
|
lastw = separator;
|
|
} else if (atom == AtomArray) {
|
|
long sl = 0;
|
|
|
|
wrputc('{', wglb->writewch);
|
|
lastw = separator;
|
|
for (op = 1; op <= Arity; ++op) {
|
|
if (op == wglb->MaxArgs) {
|
|
wrputc('.', wglb->writewch);
|
|
wrputc('.', wglb->writewch);
|
|
wrputc('.', wglb->writewch);
|
|
break;
|
|
}
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot(t);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+op, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
if (op != Arity) {
|
|
wrputc(',', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
}
|
|
wrputc('}', wglb->writewch);
|
|
lastw = separator;
|
|
} else {
|
|
putAtom(atom, wglb->Quote_illegal, wglb->writewch);
|
|
lastw = separator;
|
|
wrputc('(', wglb->writewch);
|
|
for (op = 1; op <= Arity; ++op) {
|
|
long sl = 0;
|
|
|
|
if (op == wglb->MaxArgs) {
|
|
wrputc('.', wglb->writewch);
|
|
wrputc('.', wglb->writewch);
|
|
wrputc('.', wglb->writewch);
|
|
break;
|
|
}
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
sl = Yap_InitSlot(t);
|
|
}
|
|
writeTerm(from_pointer(RepAppl(t)+op, &nrwt, wglb), 999, depth + 1, FALSE, wglb, &nrwt);
|
|
restore_from_write(&nrwt, wglb);
|
|
if (wglb->keep_terms) {
|
|
/* garbage collection may be called */
|
|
t = Yap_GetFromSlot(sl);
|
|
Yap_RecoverSlots(1);
|
|
}
|
|
if (op != Arity) {
|
|
wrputc(',', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
}
|
|
wrputc(')', wglb->writewch);
|
|
lastw = separator;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
Yap_plwrite(Term t, int (*mywrite) (int, wchar_t), int flags, int priority)
|
|
/* term to be written */
|
|
/* consumer */
|
|
/* write options */
|
|
{
|
|
struct write_globs wglb;
|
|
struct rewind_term rwt;
|
|
rwt.parent = NULL;
|
|
rwt.u.s.ptr = 0;
|
|
|
|
wglb.writewch = mywrite;
|
|
lastw = separator;
|
|
wglb.Quote_illegal = flags & Quote_illegal_f;
|
|
wglb.Handle_vars = flags & Handle_vars_f;
|
|
wglb.Use_portray = flags & Use_portray_f;
|
|
wglb.MaxDepth = max_depth;
|
|
wglb.MaxArgs = max_write_args;
|
|
/* 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));
|
|
wglb.Ignore_ops = flags & Ignore_ops_f;
|
|
/* protect slots for portray */
|
|
writeTerm(from_pointer(&t, &rwt, &wglb), priority, 1, FALSE, &wglb, &rwt);
|
|
restore_from_write(&rwt, &wglb);
|
|
}
|
|
|