784 lines
21 KiB
C
784 lines
21 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 "Yatom.h"
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#include "YapHeap.h"
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#include "yapio.h"
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#include "eval.h"
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#include "YapText.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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#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
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{
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WRITE_DEFS()
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} open_choices_t;
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#undef PAR
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#define PAR(x,y,z) { x , y, z }
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static const param_t write_defs[] =
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{
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WRITE_DEFS()
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};
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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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{
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Yap_StartSlots();
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Yap_plwrite (ARG1, GLOBAL_Stream+LOCAL_c_output_stream, 0, 0, GLOBAL_MaxPriority);
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Yap_CloseSlots();
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if (EX != 0L) {
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Term ball = Yap_PopTermFromDB(EX);
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EX = 0L;
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Yap_JumpToEnv(ball);
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return(FALSE);
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}
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return (TRUE);
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}
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#endif
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static bool
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bind_variable_names(Term t USES_REGS)
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{
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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)) 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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Bind(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
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unbind_variable_names(Term t USES_REGS)
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{
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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)) 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
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write_term ( int output_stream, Term t, xarg *args USES_REGS )
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{
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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(DOMAIN_ERROR_OUT_OF_RANGE, ctl, "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 &&
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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 &&
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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 &&
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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_PORTRAYED].used &&
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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 &&
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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 &&
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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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static Int
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write_term2 ( USES_REGS1 )
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{
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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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xarg * args = Yap_ArgListToVector ( ARG2, 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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int output_stream = LOCAL_c_output_stream;
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if (output_stream == -1) output_stream = 1;
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LOCK(GLOBAL_Stream[output_stream].streamlock);
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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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Yap_CloseSlots( mySlots );
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if (EX != 0L) {
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Term ball = Yap_PopTermFromDB(EX);
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EX = NULL;
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Yap_JumpToEnv(ball);
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return(FALSE);
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}
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return (TRUE);
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}
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static Int
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write_term3 ( USES_REGS1 )
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{
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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 = Yap_ArgListToVector ( ARG3, 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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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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yhandle_t mySlots = Yap_StartSlots();
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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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Yap_CloseSlots( mySlots );
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if (EX != 0L) {
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Term ball = Yap_PopTermFromDB(EX);
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EX = NULL;
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Yap_JumpToEnv(ball);
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return(FALSE);
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}
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return (TRUE);
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}
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|
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static Int
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write2 ( USES_REGS1 )
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{
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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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Yap_CloseSlots( mySlots );
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if (EX != 0L) {
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Term ball = Yap_PopTermFromDB(EX);
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EX = NULL;
|
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Yap_JumpToEnv(ball);
|
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return(FALSE);
|
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}
|
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return (TRUE);
|
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}
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|
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static Int
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write1 ( USES_REGS1 )
|
|
{
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|
|
|
/* notice: we must have ASP well set when using portray, otherwise
|
|
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) output_stream = 1;
|
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xarg * args = Yap_ArgListToVector ( TermNil, write_defs, WRITE_END );
|
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if (args == NULL) {
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, LOCAL_Error_Term, NULL);
|
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return false;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
args[WRITE_NUMBERVARS].used = true;
|
|
args[WRITE_NUMBERVARS].tvalue = TermTrue;
|
|
LOCK(GLOBAL_Stream[output_stream].streamlock);
|
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write_term( output_stream, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
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return(FALSE);
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int
|
|
write_canonical1 ( 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_IGNORE_OPS].used = true;
|
|
args[WRITE_IGNORE_OPS].tvalue = TermTrue;
|
|
args[WRITE_QUOTED].used = true;
|
|
args[WRITE_QUOTED].tvalue = TermTrue;
|
|
LOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
write_term( output_stream, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int
|
|
write_canonical ( 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, "write/2");
|
|
if (output_stream < 0 )
|
|
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);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int
|
|
writeq1 ( 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;
|
|
}
|
|
yhandle_t mySlots = Yap_StartSlots();
|
|
int output_stream = LOCAL_c_output_stream;
|
|
if (output_stream == -1) 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);
|
|
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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)
|
|
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 )
|
|
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);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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)
|
|
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) 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);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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)
|
|
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 )
|
|
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);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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)
|
|
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, ARG1, args PASS_REGS);
|
|
UNLOCK(GLOBAL_Stream[output_stream].streamlock);
|
|
Yap_CloseSlots( mySlots );
|
|
if (EX != 0L) {
|
|
Term ball = Yap_PopTermFromDB(EX);
|
|
EX = NULL;
|
|
Yap_JumpToEnv(ball);
|
|
return(FALSE);
|
|
}
|
|
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);
|
|
}
|
|
|
|
|
|
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 ("$VAR", 2, dollar_var, SafePredFlag);
|
|
;
|
|
}
|