748 lines
22 KiB
C
748 lines
22 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: iopreds.c *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Input/Output C implemented predicates *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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/*
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* This file includes the definition of a miscellania of standard predicates
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* for yap refering to: Files and GLOBAL_Streams, Simple Input/Output,
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*
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*/
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#include "Yap.h"
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#include "YapHeap.h"
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#include "YapText.h"
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#include "Yatom.h"
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#include "eval.h"
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#include "yapio.h"
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#include <stdlib.h>
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#if HAVE_STDARG_H
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#include <stdarg.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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#if HAVE_WCTYPE_H
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#include <wctype.h>
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#endif
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#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_SYS_SELECT_H && !_MSC_VER && !defined(__MINGW32__)
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#include <sys/select.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.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_SIGNAL_H
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#include <signal.h>
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#endif
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#if HAVE_FCNTL_H
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/* for O_BINARY and O_TEXT in WIN32 */
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#include <fcntl.h>
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#endif
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#ifdef _WIN32
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#if HAVE_IO_H
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/* Windows */
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#include <io.h>
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#endif
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#endif
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#if !HAVE_STRNCAT
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#define strncat(X, Y, Z) strcat(X, Y)
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#endif
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#if !HAVE_STRNCPY
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#define strncpy(X, Y, Z) strcpy(X, Y)
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#endif
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#if _MSC_VER || defined(__MINGW32__)
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#if HAVE_SOCKET
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#include <winsock2.h>
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#endif
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#include <windows.h>
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#ifndef S_ISDIR
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#define S_ISDIR(x) (((x)&_S_IFDIR) == _S_IFDIR)
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#endif
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#endif
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#include "iopreds.h"
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static Term readFromBuffer(const char *s, Term opts) {
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Term rval;
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int sno;
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encoding_t enc = ENC_ISO_UTF8;
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sno = Yap_open_buf_read_stream((char *)s, strlen_utf8((unsigned char *)s),
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&enc, MEM_BUF_USER);
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rval = Yap_read_term(sno, opts, 3);
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Yap_CloseStream(sno);
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return rval;
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}
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#if _MSC_VER || defined(__MINGW32__)
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#define SYSTEM_STAT _stat
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#else
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#define SYSTEM_STAT stat
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#endif
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#undef PAR
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#define WRITE_DEFS() \
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PAR("module", isatom, WRITE_MODULE) \
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, PAR("attributes", isatom, WRITE_ATTRIBUTES), \
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PAR("cycles", booleanFlag, WRITE_CYCLES), \
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PAR("quoted", booleanFlag, WRITE_QUOTED), \
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PAR("ignore_ops", booleanFlag, WRITE_IGNORE_OPS), \
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PAR("max_depth", nat, WRITE_MAX_DEPTH), \
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PAR("numbervars", booleanFlag, WRITE_NUMBERVARS), \
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PAR("portrayed", booleanFlag, WRITE_PORTRAYED), \
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PAR("portray", booleanFlag, WRITE_PORTRAY), \
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PAR("priority", nat, WRITE_PRIORITY), \
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PAR("character_escapes", booleanFlag, WRITE_CHARACTER_ESCAPES), \
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PAR("backquotes", booleanFlag, WRITE_BACKQUOTES), \
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PAR("brace_terms", booleanFlag, WRITE_BRACE_TERMS), \
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PAR("fullstop", booleanFlag, WRITE_FULLSTOP), \
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PAR("nl", booleanFlag, WRITE_NL), \
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PAR("variable_names", ok, WRITE_VARIABLE_NAMES), \
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PAR(NULL, ok, WRITE_END)
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#define PAR(x, y, z) z
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typedef enum open_enum_choices { WRITE_DEFS() } open_choices_t;
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#undef PAR
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#define PAR(x, y, z) \
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{ x, y, z }
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static const param_t write_defs[] = {WRITE_DEFS()};
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#undef PAR
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#ifdef BEAM
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int beam_write(USES_REGS1) {
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Yap_StartSlots();
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Yap_plwrite(ARG1, GLOBAL_Stream + LOCAL_c_output_stream, 0, 0,
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GLOBAL_MaxPriority);
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Yap_CloseSlots();
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Yap_RaiseException();
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return (TRUE);
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}
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#endif
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static bool bind_variable_names(Term t USES_REGS) {
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while (!IsVarTerm(t) && IsPairTerm(t)) {
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Term tl = HeadOfTerm(t);
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Functor f;
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Term tv, t2, t1;
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if (!IsApplTerm(tl))
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return FALSE;
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if ((f = FunctorOfTerm(tl)) != FunctorEq) {
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return FALSE;
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}
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t1 = ArgOfTerm(1, tl);
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if (IsVarTerm(t1)) {
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Yap_Error(INSTANTIATION_ERROR, t1, "variable_names");
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return false;
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}
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t2 = ArgOfTerm(2, tl);
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tv = Yap_MkApplTerm(FunctorDollarVar, 1, &t1);
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if (IsVarTerm(t2)) {
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YapBind(VarOfTerm(t2), tv);
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}
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t = TailOfTerm(t);
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}
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return true;
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}
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static int unbind_variable_names(Term t USES_REGS) {
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while (!IsVarTerm(t) && IsPairTerm(t)) {
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Term tl = HeadOfTerm(t);
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Functor f;
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Term *tp2, t1;
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if (!IsApplTerm(tl))
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return FALSE;
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if ((f = FunctorOfTerm(tl)) != FunctorEq) {
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return FALSE;
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}
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t1 = ArgOfTerm(1, tl);
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tp2 = RepAppl(tl) + 2;
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while (*tp2 != t1) {
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tp2 = (CELL *)*tp2;
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}
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RESET_VARIABLE(tp2);
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t = TailOfTerm(t);
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}
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return TRUE;
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}
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static bool write_term(int output_stream, Term t, xarg *args USES_REGS) {
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bool rc;
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Term cm = CurrentModule;
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int depth, prio, flags = 0;
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if (args[WRITE_MODULE].used) {
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CurrentModule = args[WRITE_MODULE].tvalue;
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}
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if (args[WRITE_VARIABLE_NAMES].used) {
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bind_variable_names(args[WRITE_VARIABLE_NAMES].tvalue PASS_REGS);
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flags |= Handle_vars_f;
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}
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if (args[WRITE_NUMBERVARS].used) {
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if (args[WRITE_NUMBERVARS].tvalue == TermTrue)
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flags |= Handle_vars_f;
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}
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if (args[WRITE_ATTRIBUTES].used) {
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Term ctl = args[WRITE_ATTRIBUTES].tvalue;
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if (ctl == TermWrite) {
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flags |= AttVar_None_f;
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} else if (ctl == TermPortray) {
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flags |= AttVar_None_f | AttVar_Portray_f;
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} else if (ctl == TermDots) {
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flags |= AttVar_Dots_f;
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} else if (ctl != TermIgnore) {
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Yap_Error(
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DOMAIN_ERROR_OUT_OF_RANGE, ctl,
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"write attributes should be one of {dots,ignore,portray,write}");
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rc = false;
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goto end;
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}
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}
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if (args[WRITE_CYCLES].used && args[WRITE_CYCLES].tvalue == TermFalse) {
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flags |= Unfold_cyclics_f;
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}
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if (args[WRITE_QUOTED].used && args[WRITE_QUOTED].tvalue == TermTrue) {
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flags |= Quote_illegal_f;
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}
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if (args[WRITE_IGNORE_OPS].used &&
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args[WRITE_IGNORE_OPS].tvalue == TermTrue) {
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flags |= Ignore_ops_f;
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}
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if (args[WRITE_PORTRAY].used && args[WRITE_IGNORE_OPS].tvalue == TermTrue) {
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flags |= Ignore_ops_f;
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}
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if (args[WRITE_PORTRAYED].used && args[WRITE_PORTRAYED].tvalue == TermTrue) {
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flags |= Use_portray_f;
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}
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if (args[WRITE_CHARACTER_ESCAPES].used &&
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args[WRITE_CHARACTER_ESCAPES].tvalue == TermFalse) {
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flags |= No_Escapes_f;
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}
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if (args[WRITE_BACKQUOTES].used &&
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args[WRITE_BACKQUOTES].tvalue == TermTrue) {
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flags |= BackQuote_String_f;
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}
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if (args[WRITE_BRACE_TERMS].used &&
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args[WRITE_BRACE_TERMS].tvalue == TermFalse) {
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flags |= No_Brace_Terms_f;
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}
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if (args[WRITE_FULLSTOP].used && args[WRITE_FULLSTOP].tvalue == TermTrue) {
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flags |= Fullstop_f;
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}
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if (args[WRITE_NL].used && args[WRITE_NL].tvalue == TermTrue) {
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flags |= New_Line_f;
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}
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if (args[WRITE_MAX_DEPTH].used) {
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depth = IntegerOfTerm(args[WRITE_MAX_DEPTH].tvalue);
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} else
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depth = LOCAL_max_depth;
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if (args[WRITE_PRIORITY].used) {
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prio = IntegerOfTerm(args[WRITE_PRIORITY].tvalue);
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} else {
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prio = GLOBAL_MaxPriority;
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}
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Yap_plwrite(t, GLOBAL_Stream + output_stream, depth, flags, prio);
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UNLOCK(GLOBAL_Stream[output_stream].streamlock);
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rc = true;
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end:
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if (args[WRITE_VARIABLE_NAMES].used) {
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unbind_variable_names(args[WRITE_VARIABLE_NAMES].tvalue PASS_REGS);
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}
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CurrentModule = cm;
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return rc;
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}
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/**
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*
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*/
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bool Yap_WriteTerm( int output_stream, Term t, Term opts USES_REGS)
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{
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xarg *args = Yap_ArgListToVector( opts, write_defs, WRITE_END);
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if (args == NULL) {
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if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
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LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
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if (LOCAL_Error_TYPE)
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Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
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return false;
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}
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yhandle_t mySlots = Yap_StartSlots();
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LOCK(GLOBAL_Stream[output_stream].streamlock);
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write_term(output_stream, t, args PASS_REGS);
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UNLOCK(GLOBAL_Stream[output_stream].streamlock);
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free( args );
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Yap_CloseSlots(mySlots);
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Yap_RaiseException();
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return (TRUE);
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}
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static Int write_term2(USES_REGS1) {
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/* '$write'(+Flags,?Term) */
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/* notice: we must have ASP well set when using portray, otherwise
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we cannot make recursive Prolog calls */
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return Yap_WriteTerm( LOCAL_c_output_stream, ARG1, ARG2 PASS_REGS);
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}
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static Int write_term3(USES_REGS1) {
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int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "write/2");
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if (output_stream < 0) {
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return false;
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}
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return Yap_WriteTerm( output_stream, ARG2, ARG3 PASS_REGS);
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}
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static Int write2(USES_REGS1) {
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/* notice: we must have ASP well set when using portray, otherwise
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we cannot make recursive Prolog calls */
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xarg *args;
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yhandle_t mySlots;
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int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "write/2");
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if (output_stream < 0)
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return false;
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args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
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if (args == NULL) {
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if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
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LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
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if (LOCAL_Error_TYPE)
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Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
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return false;
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}
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mySlots = Yap_StartSlots();
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args[WRITE_NUMBERVARS].used = true;
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args[WRITE_NUMBERVARS].tvalue = TermTrue;
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write_term(output_stream, ARG2, args PASS_REGS);
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UNLOCK(GLOBAL_Stream[output_stream].streamlock);
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free( args );
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Yap_CloseSlots(mySlots);
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Yap_RaiseException();
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return (TRUE);
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}
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static Int write1(USES_REGS1) {
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/* notice: we must have ASP well set when using portray, otherwise
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we cannot make recursive Prolog calls */
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int output_stream = LOCAL_c_output_stream;
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if (output_stream == -1)
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output_stream = 1;
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xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
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if (args == NULL) {
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if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
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LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
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if (LOCAL_Error_TYPE)
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Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
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return false;
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}
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yhandle_t mySlots = Yap_StartSlots();
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args[WRITE_NUMBERVARS].used = true;
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args[WRITE_NUMBERVARS].tvalue = TermTrue;
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LOCK(GLOBAL_Stream[output_stream].streamlock);
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write_term(output_stream, ARG1, args PASS_REGS);
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UNLOCK(GLOBAL_Stream[output_stream].streamlock);
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free( args );
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Yap_CloseSlots(mySlots);
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Yap_RaiseException();
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return (TRUE);
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}
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|
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static Int write_canonical1(USES_REGS1) {
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/* notice: we must have ASP well set when using portray, otherwise
|
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we cannot make recursive Prolog calls */
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int output_stream = LOCAL_c_output_stream;
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if (output_stream == -1)
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output_stream = 1;
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xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
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if (args == NULL) {
|
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if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
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LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
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if (LOCAL_Error_TYPE)
|
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Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
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return false;
|
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}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
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args[WRITE_IGNORE_OPS].used = true;
|
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args[WRITE_IGNORE_OPS].tvalue = TermTrue;
|
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args[WRITE_QUOTED].used = true;
|
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args[WRITE_QUOTED].tvalue = TermTrue;
|
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LOCK(GLOBAL_Stream[output_stream].streamlock);
|
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write_term(output_stream, ARG1, args PASS_REGS);
|
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UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
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free( args );
|
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Yap_CloseSlots(mySlots);
|
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Yap_RaiseException();
|
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return (TRUE);
|
|
}
|
|
|
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static Int write_canonical(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
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xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "write/2");
|
|
if (output_stream < 0) {
|
|
free( args );
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_IGNORE_OPS].used = true;
|
|
args[WRITE_IGNORE_OPS].tvalue = TermTrue;
|
|
args[WRITE_QUOTED].used = true;
|
|
args[WRITE_QUOTED].tvalue = TermTrue;
|
|
write_term(output_stream, ARG2, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int writeq1(USES_REGS1) {
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|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
int output_stream = LOCAL_c_output_stream;
|
|
if (output_stream == -1) {
|
|
free( args );
|
|
output_stream = 1;
|
|
}
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
args[WRITE_QUOTED].used = true;
|
|
args[WRITE_QUOTED].tvalue = TermTrue;
|
|
write_term(output_stream, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int writeq(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "write/2");
|
|
if (output_stream < 0) {
|
|
free( args );
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
args[WRITE_QUOTED].used = true;
|
|
args[WRITE_QUOTED].tvalue = TermTrue;
|
|
write_term(output_stream, ARG2, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int print1(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
int output_stream = LOCAL_c_output_stream;
|
|
if (output_stream == -1) {
|
|
free( args );
|
|
output_stream = 1;
|
|
}
|
|
args[WRITE_PORTRAY].used = true;
|
|
args[WRITE_PORTRAY].tvalue = TermTrue;
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
LOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
write_term(output_stream, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int print(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_WRITE_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "write/2");
|
|
if (output_stream < 0) {
|
|
free( args );
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_PORTRAY].used = true;
|
|
args[WRITE_PORTRAY].tvalue = TermTrue;
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
write_term(output_stream, ARG2, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int writeln1(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
int output_stream = LOCAL_c_output_stream;
|
|
if (output_stream == -1)
|
|
output_stream = 1;
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_NL].used = true;
|
|
args[WRITE_NL].tvalue = TermTrue;
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
LOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
write_term(output_stream, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int writeln(USES_REGS1) {
|
|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
we cannot make recursive Prolog calls */
|
|
xarg *args = Yap_ArgListToVector(TermNil, write_defs, WRITE_END);
|
|
if (args == NULL) {
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
|
return false;
|
|
}
|
|
int output_stream = Yap_CheckTextStream(ARG1, Output_Stream_f, "writeln/2");
|
|
if (output_stream < 0) {
|
|
free( args );
|
|
return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_NL].used = true;
|
|
args[WRITE_NL].tvalue = TermTrue;
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
write_term(output_stream, ARG2, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
free( args );
|
|
Yap_CloseSlots(mySlots);
|
|
Yap_RaiseException();
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int p_write_depth(USES_REGS1) { /* write_depth(Old,New) */
|
|
Term t1 = Deref(ARG1);
|
|
Term t2 = Deref(ARG2);
|
|
Term t3 = Deref(ARG3);
|
|
|
|
if (!IsVarTerm(t1) && !IsIntegerTerm(t1)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t1, "write_depth/3");
|
|
return FALSE;
|
|
}
|
|
if (!IsVarTerm(t2) && !IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t2, "write_depth/3");
|
|
return FALSE;
|
|
}
|
|
if (!IsVarTerm(t3) && !IsIntegerTerm(t3)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t3, "write_depth/3");
|
|
return FALSE;
|
|
}
|
|
if (IsVarTerm(t1)) {
|
|
Term t = MkIntegerTerm(LOCAL_max_depth);
|
|
if (!Yap_unify_constant(t1, t))
|
|
return FALSE;
|
|
} else
|
|
LOCAL_max_depth = IntegerOfTerm(t1);
|
|
if (IsVarTerm(t2)) {
|
|
Term t = MkIntegerTerm(LOCAL_max_list);
|
|
if (!Yap_unify_constant(t2, t))
|
|
return FALSE;
|
|
} else
|
|
LOCAL_max_list = IntegerOfTerm(t2);
|
|
if (IsVarTerm(t3)) {
|
|
Term t = MkIntegerTerm(LOCAL_max_write_args);
|
|
if (!Yap_unify_constant(t3, t))
|
|
return FALSE;
|
|
} else
|
|
LOCAL_max_write_args = IntegerOfTerm(t3);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int dollar_var(USES_REGS1) {
|
|
Term in = Deref(ARG1);
|
|
if (IsVarTerm(in)) {
|
|
Term t2;
|
|
if (!IsVarTerm(t2 = Deref(ARG2))) {
|
|
if (IsApplTerm(t2) && FunctorOfTerm(t2) == FunctorDollarVar) {
|
|
return Yap_unify(ArgOfTerm(1, t2), ARG1);
|
|
}
|
|
Yap_Error(TYPE_ERROR_COMPOUND, ARG2, "");
|
|
return false;
|
|
} else {
|
|
Yap_Error(INSTANTIATION_ERROR, ARG2, "");
|
|
}
|
|
}
|
|
Term t2 = Yap_unify(MkVarTerm(), ARG1);
|
|
Term tv = Yap_MkApplTerm(FunctorDollarVar, 1, &t2);
|
|
return Yap_unify(tv, ARG2);
|
|
}
|
|
|
|
|
|
static Int term_to_string(USES_REGS1) {
|
|
Term t2 = Deref(ARG2), rc = false, t1 = Deref(ARG1);
|
|
const char *s;
|
|
if (IsVarTerm(t2)) {
|
|
size_t length;
|
|
s = Yap_TermToString(ARG1, &length, LOCAL_encoding,
|
|
Quote_illegal_f | Handle_vars_f);
|
|
if (!s || !MkStringTerm(s)) {
|
|
Yap_Error(RESOURCE_ERROR_HEAP, t1,
|
|
"Could not get memory from the operating system");
|
|
return false;
|
|
}
|
|
return Yap_unify(ARG2, MkStringTerm(s));
|
|
} else if (!IsStringTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_STRING, t2, "string_to_ter®m/2");
|
|
return false;
|
|
} else {
|
|
s = StringOfTerm(t2);
|
|
}
|
|
return (rc = readFromBuffer(s, TermNil)) != 0L && Yap_unify(rc, ARG1);
|
|
}
|
|
|
|
static Int term_to_atom(USES_REGS1) {
|
|
Term t2 = Deref(ARG2), ctl, rc = false;
|
|
Atom at;
|
|
if (IsVarTerm(t2)) {
|
|
size_t length;
|
|
const char *s = Yap_TermToString(Deref(ARG1), &length, LOCAL_encoding,
|
|
Quote_illegal_f | Handle_vars_f);
|
|
if (!s || !(at = Yap_UTF8ToAtom((const unsigned char *)s))) {
|
|
Yap_Error(RESOURCE_ERROR_HEAP, t2,
|
|
"Could not get memory from the operating system");
|
|
return false;
|
|
}
|
|
return Yap_unify(ARG2, MkAtomTerm(at));
|
|
} else if (!IsAtomTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_ATOM, t2, "atom_to_term/2");
|
|
return (FALSE);
|
|
} else {
|
|
at = AtomOfTerm(t2);
|
|
}
|
|
ctl = TermNil;
|
|
return Yap_AtomToTerm(at, ctl) == 0L && Yap_unify(rc, ARG1);
|
|
}
|
|
|
|
void Yap_InitWriteTPreds(void) {
|
|
Yap_InitCPred("write_term", 2, write_term2, SyncPredFlag);
|
|
Yap_InitCPred("write_term", 3, write_term3, SyncPredFlag);
|
|
Yap_InitCPred("write", 1, write1, SyncPredFlag);
|
|
Yap_InitCPred("write", 2, write2, SyncPredFlag);
|
|
Yap_InitCPred("writeq", 1, writeq1, SyncPredFlag);
|
|
Yap_InitCPred("writeq", 2, writeq, SyncPredFlag);
|
|
Yap_InitCPred("writeln", 1, writeln1, SyncPredFlag);
|
|
Yap_InitCPred("writeln", 2, writeln, SyncPredFlag);
|
|
Yap_InitCPred("write_canonical", 1, write_canonical1, SyncPredFlag);
|
|
Yap_InitCPred("write_canonical", 2, write_canonical, SyncPredFlag);
|
|
Yap_InitCPred("print", 1, print1, SyncPredFlag);
|
|
Yap_InitCPred("print", 2, print, SyncPredFlag);
|
|
Yap_InitCPred("write_depth", 3, p_write_depth, SafePredFlag | SyncPredFlag);
|
|
;
|
|
|
|
Yap_InitCPred("term_to_string", 3, term_to_string, 0);
|
|
Yap_InitCPred("term_to_atom", 3, term_to_atom, 0);
|
|
Yap_InitCPred("write_depth", 3, p_write_depth, SafePredFlag | SyncPredFlag);
|
|
;
|
|
Yap_InitCPred("$VAR", 2, dollar_var, SafePredFlag);
|
|
;
|
|
}
|