1921 lines
50 KiB
C
1921 lines
50 KiB
C
|
|
/*************************************************************************
|
|
* *
|
|
* YAP Prolog *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: iopreds.c *
|
|
* Last rev: 5/2/88 *
|
|
* mods: *
|
|
* comments: Input/Output C implemented predicates *
|
|
* *
|
|
*************************************************************************/
|
|
#ifdef SCCS
|
|
static char SccsId[] = "%W% %G%";
|
|
#endif
|
|
|
|
/*
|
|
* This file includes the definition of a miscellania of standard predicates
|
|
* for yap refering to: Files and GLOBAL_Streams, Simple Input/Output,
|
|
*
|
|
*/
|
|
|
|
#include "Yap.h"
|
|
#include "YapEval.h"
|
|
#include "YapFlags.h"
|
|
#include "YapHeap.h"
|
|
#include "YapText.h"
|
|
#include "Yatom.h"
|
|
#include "yapio.h"
|
|
#include <stdlib.h>
|
|
#if HAVE_STDARG_H
|
|
#include <stdarg.h>
|
|
#endif
|
|
#if HAVE_CTYPE_H
|
|
#include <ctype.h>
|
|
#endif
|
|
#if HAVE_WCTYPE_H
|
|
#include <wctype.h>
|
|
#endif
|
|
#if HAVE_SYS_TIME_H
|
|
#include <sys/time.h>
|
|
#endif
|
|
#if HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#if HAVE_SYS_SELECT_H && !_MSC_VER && !defined(__MINGW32__)
|
|
#include <sys/select.h>
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#if HAVE_SIGNAL_H
|
|
#include <signal.h>
|
|
#endif
|
|
#if HAVE_FCNTL_H
|
|
/* for O_BINARY and O_TEXT in WIN32 */
|
|
#include <fcntl.h>
|
|
#endif
|
|
#ifdef _WIN32
|
|
#if HAVE_IO_H
|
|
/* priows */
|
|
#include <io.h>
|
|
#endif
|
|
#endif
|
|
#if !HAVE_STRNCAT
|
|
#define strncat(X, Y, Z) strcat(X, Y)
|
|
#endif
|
|
#if !HAVE_STRNCPY
|
|
#define strncpy(X, Y, Z) strcpy(X, Y)
|
|
#endif
|
|
#if _MSC_VER || defined(__MINGW32__)
|
|
#if HAVE_SOCKET
|
|
#include <winsock2.h>
|
|
#endif
|
|
#include <windows.h>
|
|
#ifndef S_ISDIR
|
|
#define S_ISDIR(x) (((x) & _S_IFDIR) == _S_IFDIR)
|
|
#endif
|
|
#endif
|
|
#include "iopreds.h"
|
|
|
|
#if _MSC_VER || defined(__MINGW32__)
|
|
#define SYSTEM_STAT _stat
|
|
#else
|
|
#define SYSTEM_STAT stat
|
|
#endif
|
|
|
|
static Term syntax_error(TokEntry *errtok, int sno, Term cmod, Int start, bool code, const char *msg);
|
|
|
|
static void clean_vars(VarEntry *p)
|
|
{
|
|
if (p == NULL)
|
|
return;
|
|
p->VarAdr = TermNil;
|
|
clean_vars(p->VarLeft);
|
|
clean_vars(p->VarRight);
|
|
}
|
|
|
|
#undef PAR
|
|
|
|
#ifdef O_QUASIQUOTATIONS
|
|
/** '$qq_open'(+QQRange, -Stream) is det.
|
|
|
|
Opens a quasi-quoted memory range.
|
|
|
|
@arg QQRange is a term '$quasi_quotation'(ReadData, Start, Length)
|
|
@arg Stream is a UTF-8 encoded string, whose position indication
|
|
reflects the location in the real file.
|
|
*/
|
|
|
|
static Int qq_open(USES_REGS1)
|
|
{
|
|
PRED_LD
|
|
|
|
Term t = Deref(ARG1);
|
|
|
|
if (!IsVarTerm(t) && IsApplTerm(t) && FunctorOfTerm(t) =
|
|
FunctorDQuasiQuotation)
|
|
{
|
|
void *ptr;
|
|
char *start;
|
|
size_t l int s;
|
|
Term t0, t1, t2;
|
|
|
|
if (IsPointerTerm((t0 = ArgOfTerm(1, t))) &&
|
|
IsPointerTerm((t1 = ArgOfTerm(2, t))) &&
|
|
IsIntegerTerm((t2 = ArgOfTerm(3, t))))
|
|
{
|
|
ptr = PointerOfTerm(t0);
|
|
start = PointerOfTerm(t1);
|
|
len = IntegerOfTerm(t2);
|
|
if ((s = Yap_open_buf_read_stream(start, len, ENC_UTF8, MEM_BUF_USER)) <
|
|
0)
|
|
return false;
|
|
return Yap_unify(ARG2, Yap_MkStream(s));
|
|
}
|
|
else
|
|
{
|
|
Yap_Error(TYPE_ERROR_READ_CONTEXT, t);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static int parse_quasi_quotations(ReadData _PL_rd ARG_LD)
|
|
{
|
|
if (_PL_rd->qq_tail)
|
|
{
|
|
term_t av;
|
|
int rc;
|
|
|
|
if (!PL_unify_nil(_PL_rd->qq_tail))
|
|
return FALSE;
|
|
|
|
if (!_PL_rd->quasi_quotations)
|
|
{
|
|
if ((av = PL_new_term_refs(2)) && PL_put_term(av + 0, _PL_rd->qq) &&
|
|
#if __YAP_PROLOG__
|
|
PL_put_atom(av + 1, YAP_SWIAtomFromAtom(_PL_rd->module->AtomOfME)) &&
|
|
#else
|
|
PL_put_atom(av + 1, _PL_rd->module->name) &&
|
|
#endif
|
|
PL_cons_functor_v(av, FUNCTOR_dparse_quasi_quotations2, av))
|
|
{
|
|
term_t ex;
|
|
rc = callProlog(MODULE_system, av + 0, PL_Q_CATCH_EXCEPTION, &ex);
|
|
if (rc)
|
|
return TRUE;
|
|
_PL_rd->exception = ex;
|
|
_PL_rd->has_exception = TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
else
|
|
return TRUE;
|
|
}
|
|
else if (_PL_rd->quasi_quotations) /* user option, but no quotes */
|
|
{
|
|
return PL_unify_nil(_PL_rd->quasi_quotations);
|
|
}
|
|
else
|
|
return TRUE;
|
|
}
|
|
|
|
#endif /*O_QUASIQUOTATIONS*/
|
|
|
|
#define READ_DEFS() \
|
|
PAR("comments", list_filler, READ_COMMENTS), \
|
|
PAR("module", isatom, READ_MODULE), \
|
|
PAR("priority", nat, READ_PRIORITY), \
|
|
PAR("output", filler, READ_OUTPUT), \
|
|
PAR("quasi_quotations", filler, READ_QUASI_QUOTATIONS), \
|
|
PAR("term_position", filler, READ_TERM_POSITION), \
|
|
PAR("syntax_errors", isatom, READ_SYNTAX_ERRORS), \
|
|
PAR("singletons", filler, READ_SINGLETONS), \
|
|
PAR("variables", filler, READ_VARIABLES), \
|
|
PAR("variable_names", filler, READ_VARIABLE_NAMES), \
|
|
PAR("character_escapes", booleanFlag, READ_CHARACTER_ESCAPES), \
|
|
PAR("backquoted_string", isatom, READ_BACKQUOTED_STRING), \
|
|
PAR("cycles", ok, READ_CYCLES), PAR(NULL, ok, READ_END)
|
|
|
|
#define PAR(x, y, z) z
|
|
|
|
typedef enum open_enum_choices { READ_DEFS() } read_choices_t;
|
|
|
|
#undef PAR
|
|
|
|
#define PAR(x, y, z) \
|
|
{ x, y, z }
|
|
|
|
static const param_t read_defs[] = { READ_DEFS() };
|
|
#undef PAR
|
|
|
|
static Term add_output(Term t, Term tail)
|
|
{
|
|
Term topt = Yap_MkNewApplTerm(Yap_MkFunctor(AtomOutput, 1), 1);
|
|
|
|
tail = Deref(tail);
|
|
if (IsVarTerm(tail))
|
|
{
|
|
Yap_ThrowError(INSTANTIATION_ERROR, tail, "unbound list of options");
|
|
}
|
|
Yap_unify(t, ArgOfTerm(1, topt));
|
|
if (IsVarTerm(tail))
|
|
{
|
|
Yap_ThrowError(INSTANTIATION_ERROR, tail, "unbound list of options");
|
|
}
|
|
else if (IsPairTerm(tail) || tail == TermNil)
|
|
{
|
|
return MkPairTerm(topt, tail);
|
|
}
|
|
else
|
|
{
|
|
return MkPairTerm(topt, MkPairTerm(tail, TermNil));
|
|
}
|
|
}
|
|
|
|
static Term add_names(Term t, Term tail)
|
|
{
|
|
Term topt = Yap_MkNewApplTerm(Yap_MkFunctor(AtomVariableNames, 1), 1);
|
|
|
|
Yap_unify(t, ArgOfTerm(1, topt));
|
|
if (IsVarTerm(tail))
|
|
{
|
|
Yap_ThrowError(INSTANTIATION_ERROR, tail, "unbound list of options");
|
|
}
|
|
else if (IsPairTerm(tail) || tail == TermNil)
|
|
{
|
|
return MkPairTerm(topt, tail);
|
|
}
|
|
else
|
|
{
|
|
return MkPairTerm(topt, MkPairTerm(tail, TermNil));
|
|
}
|
|
}
|
|
|
|
static Term add_priority(Term t, Term tail)
|
|
{
|
|
Term topt = Yap_MkNewApplTerm(Yap_MkFunctor(AtomPriority, 1), 1);
|
|
|
|
Yap_unify(t, ArgOfTerm(1, topt));
|
|
if (IsVarTerm(tail))
|
|
{
|
|
Yap_ThrowError(INSTANTIATION_ERROR, tail, "unbound list of options");
|
|
}
|
|
else if (IsPairTerm(tail) || tail == TermNil)
|
|
{
|
|
return MkPairTerm(topt, tail);
|
|
}
|
|
else
|
|
{
|
|
return MkPairTerm(topt, MkPairTerm(tail, TermNil));
|
|
}
|
|
}
|
|
|
|
static Term scanToList(TokEntry *tok, TokEntry *errtok)
|
|
{
|
|
TokEntry *tok0 = tok;
|
|
CELL *Hi = HR;
|
|
Term ts[1];
|
|
|
|
ts[0] = TermNil;
|
|
Term *tailp = ts;
|
|
|
|
while (tok)
|
|
{
|
|
if (HR > ASP - 1024)
|
|
{
|
|
Int used = HR - Hi;
|
|
/* for some reason moving this earlier confuses gcc on solaris */
|
|
HR = Hi;
|
|
tok = tok0;
|
|
if (!Yap_gcl(used, 1, ENV, CP))
|
|
{
|
|
return 0;
|
|
}
|
|
continue;
|
|
}
|
|
if (tok == errtok && tok->Tok != Error_tok)
|
|
{
|
|
*tailp = MkPairTerm(MkAtomTerm(AtomError), TermNil);
|
|
tailp = RepPair(*tailp) + 1;
|
|
}
|
|
Term rep = Yap_tokRep(tok);
|
|
*tailp = MkPairTerm(rep, TermNil);
|
|
tailp = RepPair(*tailp) + 1;
|
|
if (tok->TokNext == NULL)
|
|
{
|
|
break;
|
|
}
|
|
tok = tok->TokNext;
|
|
}
|
|
return ts[0];
|
|
}
|
|
|
|
/**
|
|
@pred scan_to_list( +Stream, -Tokens )
|
|
Generate a list of tokens from a scan of the (input) stream, Tokens are of
|
|
the form:
|
|
|
|
+ `atom`(Atom)
|
|
+ `<QQ>`(Text)
|
|
+ `number`(Number)
|
|
+ `var`(VarName)
|
|
+ `string`(String)
|
|
+ 'EOF''
|
|
+ symbols, including `(`, `)`, `,`, `;`
|
|
|
|
*/
|
|
static Int scan_to_list(USES_REGS1)
|
|
{
|
|
int inp_stream;
|
|
Term tpos, tout;
|
|
|
|
/* needs to change LOCAL_output_stream for write */
|
|
inp_stream = Yap_CheckTextStream(ARG1, Input_Stream_f, "read/3");
|
|
if (inp_stream == -1)
|
|
{
|
|
return false;
|
|
}
|
|
TokEntry *tok = LOCAL_tokptr = LOCAL_toktide =
|
|
Yap_tokenizer(GLOBAL_Stream + inp_stream, false, &tpos);
|
|
UNLOCK(GLOBAL_Stream[inp_stream].streamlock);
|
|
tout = scanToList(tok, NULL);
|
|
if (tout == 0)
|
|
return false;
|
|
Yap_clean_tokenizer(tok, LOCAL_VarTable, LOCAL_AnonVarTable);
|
|
|
|
return Yap_unify(ARG2, tout);
|
|
}
|
|
|
|
/**
|
|
* Syntax Error Handler
|
|
*
|
|
* @par tokptr: the sequence of tokens
|
|
* @par sno: the stream numbet
|
|
*
|
|
* Implicit arguments:
|
|
* +
|
|
*/
|
|
static Term syntax_error(TokEntry *errtok, int sno, Term cmod, Int newpos, bool code, const char *msg)
|
|
{
|
|
CACHE_REGS
|
|
Yap_MkErrorRecord(LOCAL_ActiveError, __FILE__, __FUNCTION__, __LINE__, SYNTAX_ERROR, 0, NULL);
|
|
TokEntry *tok = LOCAL_tokptr;
|
|
Int start_line = tok->TokLine;
|
|
Int err_line = errtok->TokLine;
|
|
Int startpos = tok->TokPos;
|
|
Int errpos = errtok->TokPos;
|
|
Int end_line = GetCurInpLine(GLOBAL_Stream + sno);
|
|
Int endpos = GetCurInpPos(GLOBAL_Stream + sno);
|
|
|
|
Yap_local.ActiveError->prologConsulting = Yap_Consulting();
|
|
Yap_local.ActiveError->parserFirstLine = start_line;
|
|
Yap_local.ActiveError->parserLine = err_line;
|
|
Yap_local.ActiveError->parserLastLine = end_line;
|
|
Yap_local.ActiveError->parserFirstPos = startpos;
|
|
Yap_local.ActiveError->parserPos = errpos;
|
|
Yap_local.ActiveError->parserLastPos = endpos;
|
|
Yap_local.ActiveError->parserFile =
|
|
RepAtom(AtomOfTerm((GLOBAL_Stream + sno)->user_name))->StrOfAE;
|
|
Yap_local.ActiveError->parserReadingCode = code;
|
|
|
|
if (GLOBAL_Stream[sno].status & Seekable_Stream_f)
|
|
{
|
|
char *o, *o2;
|
|
if (startpos)
|
|
startpos--;
|
|
#if HAVE_FTELLO
|
|
fseeko(GLOBAL_Stream[sno].file, startpos, SEEK_SET);
|
|
#else
|
|
fseek(GLOBAL_Stream[sno].file, startpos, SEEK_SET);
|
|
#endif
|
|
if (GLOBAL_Stream[sno].status & Seekable_Stream_f)
|
|
{
|
|
err_line = LOCAL_ActiveError->parserLine;
|
|
errpos = LOCAL_ActiveError->parserPos -1;
|
|
if (errpos <= startpos)
|
|
{
|
|
o = malloc(1);
|
|
o[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
Int sza = (errpos - startpos) + 1, tot = sza;
|
|
o = malloc(sza);
|
|
char *p = o;
|
|
{
|
|
ssize_t siz = fread(p, tot - 1, 1, GLOBAL_Stream[sno].file);
|
|
if (siz < 0)
|
|
Yap_Error(EVALUATION_ERROR_READ_STREAM, GLOBAL_Stream[sno].user_name, "%s", strerror(errno));
|
|
o[sza - 1] = '\0';
|
|
}
|
|
Yap_local.ActiveError->parserTextA = o;
|
|
if (endpos <= errpos)
|
|
{
|
|
o2 = malloc(1);
|
|
o2[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
Int sza = (endpos - errpos) + 1, tot = sza;
|
|
o2 = malloc(sza);
|
|
char *p = o2;
|
|
{
|
|
ssize_t siz = fread(p, tot - 1, 1, GLOBAL_Stream[sno].file);
|
|
if (siz < 0)
|
|
Yap_Error(EVALUATION_ERROR_READ_STREAM, GLOBAL_Stream[sno].user_name, "%s", strerror(errno));
|
|
|
|
o2[sza - 1] = '\0';
|
|
}
|
|
Yap_local.ActiveError->parserTextB = o2;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
size_t sz = 1024, e;
|
|
char *o = malloc(1024);
|
|
char *s = o;
|
|
o[0] = '\0';
|
|
while (tok)
|
|
{
|
|
if (tok->Tok == Error_tok || tok == LOCAL_toktide )
|
|
{
|
|
o = realloc(o, strlen(o) + 1);
|
|
Yap_local.ActiveError->parserTextA = o;
|
|
o = malloc(1024);
|
|
sz = 1024;
|
|
err_line = tok->TokLine;
|
|
errpos = tok->TokPos;
|
|
tok = tok->TokNext;
|
|
continue;
|
|
}
|
|
const char *ns = Yap_tokText(tok);
|
|
e = strlen(ns);
|
|
if (ns && ns[0] && e + 1 > sz - 256)
|
|
{
|
|
strcat(s, ns);
|
|
o += e;
|
|
sz -= e;
|
|
}
|
|
if (tok->TokNext && tok->TokNext->TokLine > tok->TokLine)
|
|
{
|
|
strcat(s, "\n")
|
|
; sz--;
|
|
}
|
|
tok = tok->TokNext;
|
|
}
|
|
o = realloc(o, strlen(o) + 1);
|
|
Yap_local.ActiveError->parserTextB = o;
|
|
}
|
|
}
|
|
Yap_local.ActiveError->parserPos = errpos;
|
|
Yap_local.ActiveError->parserLine = err_line;
|
|
/* 0: strat, error, end line */
|
|
/*2 msg */
|
|
/* 1: file */
|
|
Yap_local.ActiveError->culprit =
|
|
(char*)msg;
|
|
if (Yap_local.ActiveError->errorMsg) {
|
|
Yap_local.ActiveError->errorMsg = (char*)msg;
|
|
Yap_local.ActiveError->errorMsgLen = strlen(Yap_local.ActiveError->errorMsg);
|
|
}
|
|
|
|
clean_vars(LOCAL_VarTable);
|
|
clean_vars(LOCAL_AnonVarTable);
|
|
if (Yap_ExecutionMode == YAP_BOOT_MODE)
|
|
{
|
|
fprintf(stderr, "SYNTAX ERROR while booting: ");
|
|
}
|
|
return Yap_MkFullError();
|
|
}
|
|
|
|
Term Yap_syntax_error(TokEntry *errtok, int sno, const char *msg)
|
|
{
|
|
return syntax_error(errtok, sno, CurrentModule, -1, false, msg);
|
|
}
|
|
|
|
typedef struct FEnv {
|
|
Term qq, tp, sp, np, vp, ce;
|
|
Term tpos; /// initial position of the term to be read.
|
|
Term t, t0; /// the output term
|
|
TokEntry *tokstart; /// the token list
|
|
TokEntry *toklast; /// the last token
|
|
CELL *old_H; /// initial H, will be reset on stack overflow.
|
|
tr_fr_ptr old_TR; /// initial TR
|
|
xarg *args; /// input args
|
|
bool reading_clause; /// read_clause
|
|
size_t nargs; /// arity of current procedure
|
|
encoding_t enc; /// encoding of the stream being read
|
|
Term tcomms; /// Access to comments
|
|
Term cmod; /// Access to comments
|
|
char *msg; /// Error Messagge
|
|
} FEnv;
|
|
|
|
typedef struct renv {
|
|
Term bq;
|
|
bool ce, sw;
|
|
Term sy;
|
|
UInt cpos;
|
|
int prio;
|
|
int ungetc_oldc;
|
|
int had_ungetc;
|
|
bool seekable;
|
|
} REnv;
|
|
|
|
static xarg *setClauseReadEnv(Term opts, FEnv *fe, struct renv *re,
|
|
int inp_stream);
|
|
static xarg *setReadEnv(Term opts, FEnv *fe, struct renv *re, int inp_stream)
|
|
{
|
|
CACHE_REGS
|
|
LOCAL_VarTable = NULL;
|
|
|
|
LOCAL_AnonVarTable = NULL;
|
|
fe->enc = GLOBAL_Stream[inp_stream].encoding;
|
|
xarg *args =
|
|
Yap_ArgListToVector(opts, read_defs, READ_END, DOMAIN_ERROR_READ_OPTION);
|
|
if (args == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
re->bq = getReadTermBackQuotesFlag();
|
|
if (args[READ_OUTPUT].used)
|
|
{
|
|
fe->t0 = args[READ_OUTPUT].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->t0 = 0;
|
|
}
|
|
if (args[READ_MODULE].used)
|
|
{
|
|
fe->cmod = args[READ_MODULE].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->cmod = CurrentModule;
|
|
if (fe->cmod == TermProlog)
|
|
fe->cmod = PROLOG_MODULE;
|
|
}
|
|
if (args[READ_BACKQUOTED_STRING].used)
|
|
{
|
|
if (!setReadTermBackQuotesFlag(args[READ_BACKQUOTED_STRING].tvalue))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
if (args[READ_QUASI_QUOTATIONS].used)
|
|
{
|
|
fe->qq = args[READ_QUASI_QUOTATIONS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->qq = 0;
|
|
}
|
|
if (args[READ_COMMENTS].used)
|
|
{
|
|
fe->tcomms = args[READ_COMMENTS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->tcomms = 0;
|
|
}
|
|
if (args[READ_TERM_POSITION].used)
|
|
{
|
|
fe->tp = args[READ_TERM_POSITION].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->tp = 0;
|
|
}
|
|
if (args[READ_SINGLETONS].used)
|
|
{
|
|
fe->sp = args[READ_SINGLETONS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->sp = 0;
|
|
}
|
|
if (args[READ_SYNTAX_ERRORS].used)
|
|
{
|
|
re->sy = args[READ_SYNTAX_ERRORS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
re->sy = TermError; // getYapFlag( MkAtomTerm(AtomSyntaxErrors) );
|
|
}
|
|
if (args[READ_VARIABLES].used)
|
|
{
|
|
fe->vp = args[READ_VARIABLES].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->vp = 0;
|
|
}
|
|
if (args[READ_VARIABLE_NAMES].used)
|
|
{
|
|
fe->np = args[READ_VARIABLE_NAMES].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->np = 0;
|
|
}
|
|
if (args[READ_CHARACTER_ESCAPES].used || Yap_CharacterEscapes(fe->cmod))
|
|
{
|
|
fe->ce = true;
|
|
}
|
|
else
|
|
{
|
|
fe->ce = false;
|
|
}
|
|
re->seekable = (GLOBAL_Stream[inp_stream].status & Seekable_Stream_f) != 0;
|
|
if (re->seekable)
|
|
{
|
|
re->cpos = GLOBAL_Stream[inp_stream].charcount;
|
|
}
|
|
if (args[READ_PRIORITY].used)
|
|
{
|
|
re->prio = IntegerOfTerm(args[READ_PRIORITY].tvalue);
|
|
if (re->prio > GLOBAL_MaxPriority)
|
|
{
|
|
Yap_ThrowError(DOMAIN_ERROR_OPERATOR_PRIORITY, opts,
|
|
"max priority in Prolog is %d, not %ld",
|
|
GLOBAL_MaxPriority, re->prio);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
re->prio = LOCAL_default_priority;
|
|
}
|
|
fe->msg = NULL;
|
|
return args;
|
|
}
|
|
|
|
typedef enum {
|
|
YAP_START_PARSING, /// initialization
|
|
YAP_SCANNING, /// input to list of tokens
|
|
YAP_SCANNING_ERROR, /// serious error (eg oom); trying error handling, followd
|
|
/// by either restart or failure
|
|
YAP_PARSING, /// list of tokens to term
|
|
YAP_PARSING_ERROR, /// oom or syntax error
|
|
YAP_PARSING_FINISHED /// exit parser
|
|
} parser_state_t;
|
|
|
|
Int Yap_FirstLineInParse(void)
|
|
{
|
|
CACHE_REGS
|
|
return LOCAL_StartLineCount;
|
|
}
|
|
|
|
#define PUSHFET(X) *HR++ = fe->X
|
|
#define POPFET(X) fe->X = *--HR
|
|
|
|
static void reset_regs(TokEntry *tokstart, FEnv *fe)
|
|
{
|
|
CACHE_REGS
|
|
|
|
restore_machine_regs();
|
|
|
|
/* restart global */
|
|
PUSHFET(qq);
|
|
PUSHFET(tp);
|
|
PUSHFET(sp);
|
|
PUSHFET(np);
|
|
PUSHFET(vp);
|
|
PUSHFET(tpos);
|
|
PUSHFET(t);
|
|
HR = fe->old_H;
|
|
TR = (tr_fr_ptr)LOCAL_ScannerStack;
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
Yap_growstack_in_parser(&fe->old_TR, &tokstart, &LOCAL_VarTable);
|
|
LOCAL_ScannerStack = (char*)TR;
|
|
TR = fe->old_TR;
|
|
POPFET(t);
|
|
POPFET(tpos);
|
|
POPFET(vp);
|
|
POPFET(np);
|
|
POPFET(sp);
|
|
POPFET(tp);
|
|
POPFET(qq);
|
|
}
|
|
|
|
static Term get_variables(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v;
|
|
|
|
if (fe->vp)
|
|
{
|
|
while (true)
|
|
{
|
|
fe->old_H = HR;
|
|
if (setjmp(LOCAL_IOBotch) == 0)
|
|
{
|
|
if ((v = Yap_Variables(LOCAL_VarTable, TermNil)))
|
|
{
|
|
fe->old_H = HR;
|
|
return v;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
reset_regs(tokstart, fe);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static Term get_varnames(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v;
|
|
|
|
if (fe->np)
|
|
{
|
|
while (true)
|
|
{
|
|
fe->old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0)
|
|
{
|
|
if ((v = Yap_VarNames(LOCAL_VarTable, TermNil)))
|
|
{
|
|
fe->old_H = HR;
|
|
return v;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
reset_regs(tokstart, fe);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static Term get_singletons(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v;
|
|
|
|
if (fe->sp)
|
|
{
|
|
while (TRUE)
|
|
{
|
|
fe->old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0)
|
|
{
|
|
if ((v = Yap_Singletons(LOCAL_VarTable, TermNil)))
|
|
{
|
|
return v;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
reset_regs(tokstart, fe);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void warn_singletons(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v;
|
|
|
|
fe->sp = TermNil;
|
|
v = get_singletons(fe, tokstart);
|
|
if (v && v != TermNil)
|
|
{
|
|
Term singls[4];
|
|
singls[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomSingleton, 1), 1, &v);
|
|
singls[1] = MkIntegerTerm(LOCAL_SourceFileLineno);
|
|
singls[2] = MkAtomTerm(LOCAL_SourceFileName);
|
|
if (fe->t)
|
|
singls[3] = fe->t;
|
|
else
|
|
singls[1] = TermTrue;
|
|
Term t = Yap_MkApplTerm(Yap_MkFunctor(AtomStyleCheck, 4), 4, singls);
|
|
Yap_PrintWarning(t);
|
|
}
|
|
}
|
|
|
|
static Term get_stream_position(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v;
|
|
|
|
if (fe->tp)
|
|
{
|
|
while (true)
|
|
{
|
|
fe->old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0)
|
|
{
|
|
if ((v = CurrentPositionToTerm()))
|
|
{
|
|
return v;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
reset_regs(tokstart, fe);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool complete_processing(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v1, v2, v3, vc, tp;
|
|
|
|
if (fe->t0 && fe->t && !(Yap_unify(fe->t, fe->t0)))
|
|
return false;
|
|
|
|
if (fe->t && fe->vp)
|
|
v1 = get_variables(fe, tokstart);
|
|
else
|
|
v1 = 0L;
|
|
if (fe->t && fe->np)
|
|
v2 = get_varnames(fe, tokstart);
|
|
else
|
|
v2 = 0L;
|
|
if (fe->t && fe->sp)
|
|
v3 = get_singletons(fe, tokstart);
|
|
else
|
|
v3 = 0L;
|
|
if (fe->t && fe->tcomms)
|
|
vc = LOCAL_Comments;
|
|
else
|
|
vc = 0L;
|
|
if (fe->t && fe->tp)
|
|
tp = get_stream_position(fe, tokstart);
|
|
else
|
|
tp = 0L;
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable);
|
|
free(fe->args);
|
|
|
|
// trail must be ok by now.]
|
|
if (fe->t)
|
|
{
|
|
return (!v1 || Yap_unify(v1, fe->vp)) && (!v2 || Yap_unify(v2, fe->np)) &&
|
|
(!v3 || Yap_unify(v3, fe->sp)) && (!tp || Yap_unify(tp, fe->tp)) &&
|
|
(!vc || Yap_unify(vc, fe->tcomms));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool complete_clause_processing(FEnv *fe, TokEntry *tokstart)
|
|
{
|
|
CACHE_REGS
|
|
Term v_vp, v_vnames, v_comments, v_pos;
|
|
|
|
if (fe->t0 && fe->t && !Yap_unify(fe->t, fe->t0))
|
|
return false;
|
|
if (fe->t && fe->vp)
|
|
v_vp = get_variables(fe, tokstart);
|
|
else
|
|
v_vp = 0L;
|
|
if (fe->t && fe->np)
|
|
v_vnames = get_varnames(fe, tokstart);
|
|
else
|
|
v_vnames = 0L;
|
|
if (fe->t && fe->reading_clause && trueGlobalPrologFlag(SINGLE_VAR_WARNINGS_FLAG))
|
|
{
|
|
warn_singletons(fe, tokstart);
|
|
}
|
|
if (fe->t && fe->tcomms)
|
|
v_comments = LOCAL_Comments;
|
|
else
|
|
v_comments = 0L;
|
|
if (fe->t && fe->tp)
|
|
v_pos = get_stream_position(fe, tokstart);
|
|
else
|
|
v_pos = 0L;
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable);
|
|
free(fe->args);
|
|
// trail must be ok by now.]
|
|
if (fe->t)
|
|
{
|
|
return (!v_vp || Yap_unify(v_vp, fe->vp)) &&
|
|
(!v_vnames || Yap_unify(v_vnames, fe->np)) &&
|
|
(!v_pos || Yap_unify(v_pos, fe->tp)) &&
|
|
(!v_comments || Yap_unify(v_comments, fe->tcomms));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static parser_state_t initParser(Term opts, FEnv *fe, REnv *re, int inp_stream,
|
|
bool clause);
|
|
|
|
static parser_state_t parse(REnv *re, FEnv *fe, int inp_stream);
|
|
|
|
static parser_state_t scanError(REnv *re, FEnv *fe, int inp_stream);
|
|
|
|
static parser_state_t scanEOF(FEnv *fe, int inp_stream);
|
|
|
|
static parser_state_t scan(REnv *re, FEnv *fe, int inp_stream);
|
|
|
|
static parser_state_t scanEOF(FEnv *fe, int inp_stream)
|
|
{
|
|
CACHE_REGS
|
|
// bool store_comments = false;
|
|
TokEntry *tokstart = LOCAL_tokptr;
|
|
|
|
// check for an user abort
|
|
if (tokstart != NULL && tokstart->Tok != Ord(eot_tok))
|
|
{
|
|
/* we got the end of file from an abort */
|
|
if (fe->msg && !strcmp(fe->msg, "Abort"))
|
|
{
|
|
fe->t = 0L;
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable);
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
// a :- <eof>
|
|
if (GLOBAL_Stream[inp_stream].status & Past_Eof_Stream_f)
|
|
{
|
|
fe->msg = "parsing stopped at a end-of-file";
|
|
return YAP_PARSING_ERROR;
|
|
}
|
|
/* we need to force the next read to also give end of file.*/
|
|
GLOBAL_Stream[inp_stream].status |= Push_Eof_Stream_f;
|
|
fe->msg = "end of file found before end of term";
|
|
return YAP_PARSING;
|
|
}
|
|
else
|
|
{
|
|
// <eof>
|
|
// return end_of_file
|
|
TR = (tr_fr_ptr)tokstart;
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable);
|
|
fe->t = MkAtomTerm(AtomEof);
|
|
if (fe->np && !Yap_unify(TermNil, fe->np))
|
|
fe->t = 0;
|
|
if (fe->sp && !Yap_unify(TermNil, fe->sp))
|
|
fe->t = 0;
|
|
if (fe->vp && !Yap_unify(TermNil, fe->vp))
|
|
fe->t = 0;
|
|
if (fe->tp && !Yap_unify(fe->tp, fe->tpos))
|
|
fe->t = 0;
|
|
#if DEBUG
|
|
if (GLOBAL_Option['p' - 'a' + 1])
|
|
{
|
|
fprintf(stderr, "[ end_of_file %p ]\n", GLOBAL_Stream[inp_stream].name);
|
|
}
|
|
#endif
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
}
|
|
|
|
static parser_state_t initParser(Term opts, FEnv *fe, REnv *re, int inp_stream,
|
|
bool clause)
|
|
{
|
|
LOCAL_ErrorMessage = NULL;
|
|
fe->old_TR = TR;
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
LOCAL_SourceFileName = GLOBAL_Stream[inp_stream].name;
|
|
LOCAL_eot_before_eof = false;
|
|
fe->tpos = StreamPosition(inp_stream);
|
|
fe->reading_clause = clause;
|
|
if (clause)
|
|
{
|
|
fe->args = setClauseReadEnv(opts, fe, re, inp_stream);
|
|
}
|
|
else
|
|
{
|
|
fe->args = setReadEnv(opts, fe, re, inp_stream);
|
|
}
|
|
if (fe->args == NULL)
|
|
{
|
|
if (LOCAL_Error_TYPE == DOMAIN_ERROR_OUT_OF_RANGE)
|
|
LOCAL_Error_TYPE = DOMAIN_ERROR_READ_OPTION;
|
|
if (LOCAL_Error_TYPE)
|
|
Yap_Error(LOCAL_Error_TYPE, opts, NULL);
|
|
fe->t = 0;
|
|
return YAP_PARSING_FINISHED;
|
|
;
|
|
}
|
|
if (GLOBAL_Stream[inp_stream].status & Push_Eof_Stream_f)
|
|
{
|
|
fe->t = MkAtomTerm(AtomEof);
|
|
GLOBAL_Stream[inp_stream].status &= ~Push_Eof_Stream_f;
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
if (!fe->args)
|
|
{
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
return YAP_SCANNING;
|
|
}
|
|
|
|
static parser_state_t scan(REnv *re, FEnv *fe, int sno)
|
|
{
|
|
CACHE_REGS
|
|
/* preserve value of H after scanning: otherwise we may lose strings
|
|
and floats */
|
|
LOCAL_tokptr = LOCAL_toktide =
|
|
|
|
Yap_tokenizer(GLOBAL_Stream + sno, false, &fe->tpos);
|
|
|
|
#if DEBUG
|
|
if (GLOBAL_Option[2])
|
|
{
|
|
TokEntry *t = LOCAL_tokptr;
|
|
int n = 0;
|
|
while (t)
|
|
{
|
|
fprintf(stderr, "[Token %d %s %d]", Ord(t->Tok), Yap_tokText(t), n++);
|
|
t = t->TokNext;
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
#endif
|
|
if (LOCAL_ErrorMessage)
|
|
return YAP_SCANNING_ERROR;
|
|
if (LOCAL_tokptr->Tok != Ord(eot_tok))
|
|
{
|
|
// next step
|
|
return YAP_PARSING;
|
|
}
|
|
if (LOCAL_tokptr->Tok == eot_tok && LOCAL_tokptr->TokInfo == TermNl)
|
|
{
|
|
LOCAL_ErrorMessage = ". is end-of-term?";
|
|
return YAP_PARSING_ERROR;
|
|
}
|
|
return scanEOF(fe, sno);
|
|
}
|
|
|
|
static parser_state_t scanError(REnv *re, FEnv *fe, int inp_stream)
|
|
{
|
|
CACHE_REGS
|
|
fe->t = 0;
|
|
|
|
// running out of memory
|
|
if (LOCAL_Error_TYPE == RESOURCE_ERROR_TRAIL)
|
|
{
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_growtrail(sizeof(CELL) * K16, FALSE))
|
|
{
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
}
|
|
else if (LOCAL_Error_TYPE == RESOURCE_ERROR_AUXILIARY_STACK)
|
|
{
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_ExpandPreAllocCodeSpace(0, NULL, TRUE))
|
|
{
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
}
|
|
else if (LOCAL_Error_TYPE == RESOURCE_ERROR_HEAP)
|
|
{
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_growheap(FALSE, 0, NULL))
|
|
{
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
}
|
|
else if (LOCAL_Error_TYPE == RESOURCE_ERROR_STACK)
|
|
{
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_gcl(LOCAL_Error_Size, fe->nargs, ENV, CP))
|
|
{
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
}
|
|
// go back to the start
|
|
if (LOCAL_Error_TYPE == SYNTAX_ERROR)
|
|
{
|
|
return YAP_PARSING_ERROR;
|
|
}
|
|
if (re->seekable)
|
|
{
|
|
if (GLOBAL_Stream[inp_stream].status & InMemory_Stream_f)
|
|
{
|
|
GLOBAL_Stream[inp_stream].u.mem_string.pos = re->cpos;
|
|
}
|
|
else if (GLOBAL_Stream[inp_stream].status)
|
|
{
|
|
#if HAVE_FTELLO
|
|
fseeko(GLOBAL_Stream[inp_stream].file, re->cpos, 0L);
|
|
#else
|
|
fseek(GLOBAL_Stream[inp_stream].file, re->cpos, 0L);
|
|
#endif
|
|
}
|
|
}
|
|
return YAP_SCANNING;
|
|
}
|
|
|
|
static parser_state_t parseError(REnv *re, FEnv *fe, int inp_stream)
|
|
{
|
|
CACHE_REGS
|
|
fe->t = 0;
|
|
|
|
if (LOCAL_Error_TYPE != SYNTAX_ERROR && LOCAL_Error_TYPE != YAP_NO_ERROR)
|
|
{
|
|
return YAP_SCANNING_ERROR;
|
|
}
|
|
Term ParserErrorStyle = re->sy;
|
|
if (ParserErrorStyle == TermQuiet || LOCAL_Error_TYPE == YAP_NO_ERROR)
|
|
{
|
|
/* just fail */
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
Term t = syntax_error(fe->toklast, inp_stream, fe->cmod, re->cpos, fe->reading_clause, fe->msg);
|
|
if (ParserErrorStyle == TermException)
|
|
{
|
|
if (LOCAL_RestartEnv && !LOCAL_delay)
|
|
{
|
|
Yap_RestartYap(5);
|
|
}
|
|
Yap_exit(5);
|
|
}
|
|
if (re->seekable)
|
|
{
|
|
re->cpos = GLOBAL_Stream[inp_stream].charcount;
|
|
}
|
|
LOCAL_Error_TYPE = WARNING_SYNTAX_ERROR;
|
|
Yap_PrintWarning(0);
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (ParserErrorStyle == TermDec10)
|
|
{
|
|
return YAP_SCANNING;
|
|
}
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
|
|
static parser_state_t parse(REnv *re, FEnv *fe, int inp_stream)
|
|
{
|
|
CACHE_REGS
|
|
TokEntry *tokstart = LOCAL_tokptr;
|
|
|
|
fe->t = Yap_Parse(re->prio, fe->enc, fe->cmod);
|
|
fe->toklast = LOCAL_tokptr;
|
|
LOCAL_tokptr = tokstart;
|
|
TR = (tr_fr_ptr)tokstart;
|
|
#if EMACS
|
|
first_char = tokstart->TokPos;
|
|
#endif /* EMACS */
|
|
if (LOCAL_Error_TYPE != YAP_NO_ERROR || fe->t == 0)
|
|
return YAP_PARSING_ERROR;
|
|
return YAP_PARSING_FINISHED;
|
|
}
|
|
|
|
/**
|
|
* @brief generic routine to read terms from a stream
|
|
*
|
|
*
|
|
* @arg inp_stream: where we read from
|
|
* @arg: opts, a list with options
|
|
* @arg: if called from read_term, arity
|
|
* called from read_clause, -arity
|
|
*
|
|
* @return the term or 0 in case of error.
|
|
*
|
|
* Implementation uses a state machine: default is init, scan, parse, complete.
|
|
*
|
|
*
|
|
*/
|
|
Term Yap_read_term(int sno, Term opts, bool clause)
|
|
{
|
|
FEnv fe;
|
|
REnv re;
|
|
|
|
#if EMACS
|
|
int emacs_cares = FALSE;
|
|
#endif
|
|
|
|
yap_error_descriptor_t *new = malloc(sizeof *new);
|
|
bool err = Yap_pushErrorContext(true, new);
|
|
int lvl = push_text_stack();
|
|
parser_state_t state = YAP_START_PARSING;
|
|
while (true)
|
|
{
|
|
switch (state)
|
|
{
|
|
case YAP_START_PARSING:
|
|
state = initParser(opts, &fe, &re, sno, clause);
|
|
if (state == YAP_PARSING_FINISHED)
|
|
{
|
|
pop_text_stack(lvl);
|
|
Yap_popErrorContext(err, true);
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
case YAP_SCANNING:
|
|
state = scan(&re, &fe, sno);
|
|
break;
|
|
|
|
case YAP_SCANNING_ERROR:
|
|
state = scanError(&re, &fe, sno);
|
|
break;
|
|
|
|
case YAP_PARSING:
|
|
state = parse(&re, &fe, sno);
|
|
break;
|
|
|
|
case YAP_PARSING_ERROR:
|
|
state = parseError(&re, &fe, sno);
|
|
break;
|
|
|
|
case YAP_PARSING_FINISHED: {
|
|
CACHE_REGS
|
|
bool done;
|
|
if (fe.reading_clause)
|
|
done = complete_clause_processing(&fe, LOCAL_tokptr);
|
|
else
|
|
done = complete_processing(&fe, LOCAL_tokptr);
|
|
if (!done)
|
|
{
|
|
state = YAP_PARSING_ERROR;
|
|
fe.t = 0;
|
|
break;
|
|
}
|
|
#if EMACS
|
|
first_char = tokstart->TokPos;
|
|
#endif /* EMACS */
|
|
pop_text_stack(lvl);
|
|
Yap_popErrorContext(err, true);
|
|
return fe.t;
|
|
}
|
|
}
|
|
}
|
|
Yap_popErrorContext(err, true);
|
|
pop_text_stack(lvl);
|
|
return 0;
|
|
}
|
|
|
|
static Int
|
|
read_term2(USES_REGS1) /* '$read'(+Flag,?Term,?Module,?Vars,-Pos,-Err) */
|
|
{
|
|
return Yap_read_term(LOCAL_c_input_stream, add_output(ARG1, ARG2), false) !=
|
|
0;
|
|
}
|
|
|
|
static Int read_term(
|
|
USES_REGS1) /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */
|
|
{
|
|
int sno;
|
|
Term out;
|
|
|
|
/* needs to change LOCAL_output_stream for write */
|
|
|
|
sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "read/3");
|
|
if (sno == -1)
|
|
{
|
|
return(FALSE);
|
|
}
|
|
out = Yap_read_term(sno, add_output(ARG2, ARG3), false);
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return out != 0L;
|
|
}
|
|
|
|
#define READ_CLAUSE_DEFS() \
|
|
PAR("comments", list_filler, READ_CLAUSE_COMMENTS) \
|
|
, PAR("module", isatom, READ_CLAUSE_MODULE), \
|
|
PAR("variable_names", filler, READ_CLAUSE_VARIABLE_NAMES), \
|
|
PAR("variables", filler, READ_CLAUSE_VARIABLES), \
|
|
PAR("term_position", filler, READ_CLAUSE_TERM_POSITION), \
|
|
PAR("syntax_errors", isatom, READ_CLAUSE_SYNTAX_ERRORS), \
|
|
PAR("output", isatom, READ_CLAUSE_OUTPUT), \
|
|
PAR(NULL, ok, READ_CLAUSE_END)
|
|
|
|
#define PAR(x, y, z) z
|
|
|
|
typedef enum read_clause_enum_choices {
|
|
READ_CLAUSE_DEFS()
|
|
} read_clause_choices_t;
|
|
|
|
#undef PAR
|
|
|
|
#define PAR(x, y, z) \
|
|
{ x, y, z }
|
|
|
|
static const param_t read_clause_defs[] = { READ_CLAUSE_DEFS() };
|
|
#undef PAR
|
|
|
|
static xarg *setClauseReadEnv(Term opts, FEnv *fe, struct renv *re, int sno)
|
|
{
|
|
CACHE_REGS
|
|
|
|
xarg *args = Yap_ArgListToVector(opts, read_clause_defs, READ_CLAUSE_END,
|
|
DOMAIN_ERROR_READ_OPTION);
|
|
|
|
if (args == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
if (args[READ_CLAUSE_OUTPUT].used)
|
|
{
|
|
fe->t0 = args[READ_CLAUSE_OUTPUT].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->t0 = 0;
|
|
}
|
|
if (args[READ_CLAUSE_MODULE].used)
|
|
{
|
|
fe->cmod = args[READ_CLAUSE_MODULE].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->cmod = LOCAL_SourceModule;
|
|
if (fe->cmod == TermProlog)
|
|
fe->cmod = PROLOG_MODULE;
|
|
}
|
|
re->bq = getReadTermBackQuotesFlag();
|
|
fe->enc = GLOBAL_Stream[sno].encoding;
|
|
fe->sp = 0;
|
|
fe->qq = 0;
|
|
if (args[READ_CLAUSE_OUTPUT].used)
|
|
{
|
|
fe->t0 = args[READ_CLAUSE_OUTPUT].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->t0 = 0;
|
|
}
|
|
if (args[READ_CLAUSE_TERM_POSITION].used)
|
|
{
|
|
fe->tp = args[READ_CLAUSE_TERM_POSITION].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->tp = 0;
|
|
}
|
|
fe->sp = 0;
|
|
if (args[READ_CLAUSE_COMMENTS].used)
|
|
{
|
|
fe->tcomms = args[READ_CLAUSE_COMMENTS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->tcomms = 0L;
|
|
}
|
|
if (args[READ_CLAUSE_SYNTAX_ERRORS].used)
|
|
{
|
|
re->sy = args[READ_CLAUSE_SYNTAX_ERRORS].tvalue;
|
|
}
|
|
else
|
|
{
|
|
re->sy = TermDec10;
|
|
}
|
|
fe->vp = 0;
|
|
if (args[READ_CLAUSE_VARIABLE_NAMES].used)
|
|
{
|
|
fe->np = args[READ_CLAUSE_VARIABLE_NAMES].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->np = 0;
|
|
}
|
|
if (args[READ_CLAUSE_VARIABLES].used)
|
|
{
|
|
fe->vp = args[READ_CLAUSE_VARIABLES].tvalue;
|
|
}
|
|
else
|
|
{
|
|
fe->vp = 0;
|
|
}
|
|
fe->ce = Yap_CharacterEscapes(fe->cmod);
|
|
re->seekable = (GLOBAL_Stream[sno].status & Seekable_Stream_f) != 0;
|
|
if (re->seekable)
|
|
{
|
|
re->cpos = GLOBAL_Stream[sno].charcount;
|
|
}
|
|
re->prio = LOCAL_default_priority;
|
|
fe->msg = NULL;
|
|
return args;
|
|
}
|
|
|
|
/**
|
|
* @pred read_clause( +Stream, -Clause, ?Opts) is det
|
|
*
|
|
* Same as read_clause/3, but from the standard input stream.
|
|
*
|
|
*/
|
|
static Int read_clause2(USES_REGS1)
|
|
{
|
|
Term ctl = add_output(ARG1, ARG2);
|
|
|
|
return Yap_read_term(LOCAL_c_input_stream, ctl, true);
|
|
}
|
|
|
|
/**
|
|
* @pred read_clause( +Stream, -Clause, ?Opts) is det
|
|
*
|
|
* This predicate receives a set of options _OPts_ based on read_term/3, but
|
|
* specific
|
|
* to readin clauses. The following options are considered:
|
|
*
|
|
* + The `comments` option unifies its argument with the comments in the
|
|
* term,
|
|
* represented as strings
|
|
* + The `process_comments` option calls a hook, it is current ignored by
|
|
* YAP.
|
|
* + The `term_position` unifies its argument with a term describing the
|
|
* position of the term.
|
|
* + The `syntax_errors` flag controls response to syntactic errors, the
|
|
* default is `dec10`.
|
|
*
|
|
* The next two options are called implicitly:
|
|
*
|
|
* + The `module` option is initialized to the current source module, by
|
|
* default.
|
|
* + The `singletons` option is set from the single var flag
|
|
*/
|
|
static Int read_clause(
|
|
USES_REGS1) /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */
|
|
{
|
|
int sno;
|
|
Term out;
|
|
|
|
/* needs to change LOCAL_output_stream for write */
|
|
sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "read/3");
|
|
if (sno < 0)
|
|
return false;
|
|
out = Yap_read_term(sno, add_output(ARG2, ARG3), true);
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return out != 0;
|
|
}
|
|
|
|
/**
|
|
* start input for a meta-clause. Should obtain:
|
|
* - predicate name
|
|
* - predicate arity
|
|
* - address for 256 cluses.
|
|
*
|
|
* @param ARG1 input stream
|
|
* @param ARG2 Adress of predicate.
|
|
* @param ARG3 Term read.
|
|
* @return [description]
|
|
*/
|
|
#if 0
|
|
static Int start_mega(USES_REGS1)
|
|
{
|
|
int sno;
|
|
Term out;
|
|
Term t3 = Deref(ARG3);
|
|
yhandle_t h = Yap_InitSlot(ARG2);
|
|
TokENtry *tok;
|
|
arity_t srity = 0;
|
|
|
|
/* needs to change LOCAL_output_stream for write */
|
|
sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "read_exo/3");
|
|
if (sno < 0)
|
|
return false;
|
|
/* preserve value of H after scanning: otherwise we may lose strings
|
|
and floats */
|
|
LOCAL_tokptr = LOCAL_toktide =
|
|
x Yap_tokenizer(GLOBAL_Stream + sno, false, &tpos);
|
|
if (tokptr->Tok == Name_tok && (next = tokptr->TokNext) != NULL &&
|
|
next->Tok == Ponctuation_tok && next->TokInfo == TermOpenBracket)
|
|
{
|
|
bool start = true;
|
|
while ((tokptr = next->TokNext))
|
|
{
|
|
if (IsAtomOrIntTerm(t = *tp))
|
|
{
|
|
ip->opc = Yap_opcode(get_atom);
|
|
ip->y_u.x_c.c = t.
|
|
ip->y_u.x_c.x = tp++; / ()c * /
|
|
}
|
|
else if (IsAtomOrIntTerm(t = *tp))
|
|
{
|
|
(IsAtom(tok->Tokt) || IsIntTerm(XREGS + (i + 1)))extra[arity]
|
|
]
|
|
}
|
|
#endif
|
|
/**
|
|
* @pred source_location( - _File_ , _Line_ )
|
|
*
|
|
* unify _File_ and _Line_ wuth the position of the last term read, if the
|
|
* term
|
|
* comes from a stream created by opening a file-system path with open/3 and
|
|
* friends.>position
|
|
* It ignores user_input or
|
|
* sockets.
|
|
*
|
|
* @param - _File_
|
|
* @param - _Line_
|
|
*
|
|
*
|
|
*
|
|
* @note SWI-Prolog built-in.
|
|
*/
|
|
static Int source_location(USES_REGS1)
|
|
{
|
|
return Yap_unify(ARG1, MkAtomTerm(LOCAL_SourceFileName)) &&
|
|
Yap_unify(ARG2, MkIntegerTerm(LOCAL_SourceFileLineno));
|
|
}
|
|
|
|
/**
|
|
* @pred read(+ Stream, -Term ) is iso
|
|
*
|
|
* Reads term _T_ from the stream _S_ instead of from the current input
|
|
* stream.
|
|
*
|
|
* @param - _Stream_
|
|
* @param - _Term_
|
|
*
|
|
*/
|
|
static Int read2(
|
|
USES_REGS1) /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */
|
|
{
|
|
int sno;
|
|
Int out;
|
|
|
|
/* needs to change LOCAL_output_stream for write */
|
|
sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "read/3");
|
|
if (sno == -1)
|
|
{
|
|
return(FALSE);
|
|
}
|
|
out = Yap_read_term(sno, add_output(ARG2, TermNil), false);
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return out;
|
|
}
|
|
|
|
/** @pred read(- T) is iso
|
|
|
|
Reads the next term from the current input stream, and unifies it with
|
|
_T_. The term must be followed by a dot (`.`) and any blank-character
|
|
as previously defined. The syntax of the term must match the current
|
|
declarations for operators (see op). If the end-of-stream is reached,
|
|
_T_ is unified with the atom `end_of_file`. Further reads from of
|
|
the same stream may cause an error failure (see open/3).
|
|
|
|
*/
|
|
static Int read1(
|
|
USES_REGS1) /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */
|
|
{
|
|
Term out = Yap_read_term(LOCAL_c_input_stream, add_output(ARG1, TermNil), 1);
|
|
|
|
return out;
|
|
}
|
|
|
|
/** @pred fileerrors
|
|
|
|
Switches on the file_errors flag so that in certain error conditions
|
|
Input/Output predicates will produce an appropriated message and abort.
|
|
|
|
*/
|
|
static Int fileerrors(USES_REGS1)
|
|
{
|
|
return setYapFlag(TermFileErrors, TermTrue);
|
|
}
|
|
|
|
/**
|
|
@pred nofileerrors
|
|
|
|
Switches off the `file_errors` flag, so that the predicates see/1,
|
|
tell/1, open/3 and close/1 just fail, instead of producing
|
|
an error message and aborting whenever the specified file cannot be
|
|
opened or closed.
|
|
|
|
*/
|
|
static Int nofileerrors(
|
|
USES_REGS1) /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */
|
|
{
|
|
return setYapFlag(TermFileerrors, TermFalse);
|
|
}
|
|
|
|
static Int style_checker(USES_REGS1)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
|
|
if (IsVarTerm(t))
|
|
{
|
|
Term t = TermNil;
|
|
if (getYapFlag(MkAtomTerm(AtomSingleVarWarnings)) == TermTrue)
|
|
{
|
|
t = MkPairTerm(MkAtomTerm(AtomSingleVarWarnings), t);
|
|
}
|
|
if (getYapFlag(MkAtomTerm(AtomDiscontiguousWarnings)) == TermTrue)
|
|
{
|
|
t = MkPairTerm(MkAtomTerm(AtomDiscontiguousWarnings), t);
|
|
}
|
|
if (getYapFlag(MkAtomTerm(AtomRedefineWarnings)) == TermTrue)
|
|
{
|
|
t = MkPairTerm(MkAtomTerm(AtomRedefineWarnings), t);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (IsPairTerm(t))
|
|
{
|
|
Term h = HeadOfTerm(t);
|
|
t = TailOfTerm(t);
|
|
|
|
if (IsVarTerm(h))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t, "style_check/1");
|
|
return(FALSE);
|
|
}
|
|
else if (IsAtomTerm(h))
|
|
{
|
|
Atom at = AtomOfTerm(h);
|
|
if (at == AtomSingleVarWarnings)
|
|
setYapFlag(MkAtomTerm(AtomSingleVarWarnings), TermTrue);
|
|
else if (at == AtomDiscontiguousWarnings)
|
|
setYapFlag(MkAtomTerm(AtomDiscontiguousWarnings), TermTrue);
|
|
else if (at == AtomRedefineWarnings)
|
|
setYapFlag(MkAtomTerm(AtomRedefineWarnings), TermTrue);
|
|
}
|
|
else
|
|
{
|
|
Atom at = AtomOfTerm(ArgOfTerm(1, h));
|
|
if (at == AtomSingleVarWarnings)
|
|
setYapFlag(MkAtomTerm(AtomSingleVarWarnings), TermFalse);
|
|
else if (at == AtomDiscontiguousWarnings)
|
|
setYapFlag(MkAtomTerm(AtomDiscontiguousWarnings), TermFalse);
|
|
else if (at == AtomRedefineWarnings)
|
|
setYapFlag(MkAtomTerm(AtomRedefineWarnings), TermFalse);
|
|
}
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
Term Yap_BufferToTerm(const char *s, Term opts)
|
|
{
|
|
Term rval;
|
|
int sno;
|
|
encoding_t l = ENC_ISO_UTF8;
|
|
|
|
sno =
|
|
Yap_open_buf_read_stream((char*)s, strlen(s) + 1, &l, MEM_BUF_USER,
|
|
Yap_LookupAtom(Yap_StrPrefix(s, 16)), TermNone);
|
|
|
|
GLOBAL_Stream[sno].status |= CloseOnException_Stream_f;
|
|
rval = Yap_read_term(sno, opts, false);
|
|
Yap_CloseStream(sno);
|
|
return rval;
|
|
}
|
|
|
|
Term Yap_UBufferToTerm(const unsigned char *s, Term opts)
|
|
{
|
|
Term rval;
|
|
int sno;
|
|
encoding_t l = ENC_ISO_UTF8;
|
|
|
|
sno = Yap_open_buf_read_stream(
|
|
(char*)s, strlen((const char*)s), &l, MEM_BUF_USER,
|
|
Yap_LookupAtom(Yap_StrPrefix((char*)s, 16)), TermNone);
|
|
GLOBAL_Stream[sno].status |= CloseOnException_Stream_f;
|
|
rval = Yap_read_term(sno, opts, false);
|
|
Yap_CloseStream(sno);
|
|
return rval;
|
|
}
|
|
|
|
X_API Term Yap_BufferToTermWithPrioBindings(const char *s, Term opts,
|
|
Term bindings, size_t len,
|
|
int prio)
|
|
{
|
|
CACHE_REGS
|
|
Term ctl;
|
|
|
|
ctl = opts;
|
|
if (bindings)
|
|
{
|
|
ctl = add_names(bindings, TermNil);
|
|
}
|
|
if (prio != 1200)
|
|
{
|
|
ctl = add_priority(bindings, ctl);
|
|
}
|
|
return Yap_BufferToTerm(s, ctl);
|
|
}
|
|
|
|
/**
|
|
* @pred read_term_from_atom( +Atom , -T , +Options )
|
|
*
|
|
* read a term _T_ stored in constant _Atom_ according to _Options_
|
|
*
|
|
* @param _Atom_ the source _Atom_
|
|
* @param _T_ the output term _T_, may be any term
|
|
* @param _Options_ read_term/3 options.
|
|
*
|
|
* @note Originally from SWI-Prolog, in YAP only works with internalised
|
|
* atoms
|
|
* Check read_term_from_atomic/3 for the general version. Also, the built-in
|
|
* is
|
|
* supposed to
|
|
* use YAP's internal encoding, so please avoid the encoding/1 option.
|
|
*/
|
|
static Int read_term_from_atom(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1);
|
|
Atom at;
|
|
const unsigned char *s;
|
|
|
|
if (IsVarTerm(t1))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t1, "style_check/1");
|
|
return false;
|
|
}
|
|
else if (!IsAtomTerm(t1))
|
|
{
|
|
Yap_Error(TYPE_ERROR_ATOM, t1, "style_check/1");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
at = AtomOfTerm(t1);
|
|
s = at->UStrOfAE;
|
|
}
|
|
Term ctl = add_output(ARG2, ARG3);
|
|
|
|
return Yap_UBufferToTerm(s, ctl);
|
|
}
|
|
|
|
/**
|
|
* @pred read_term_from_atomic( +Atomic , - T , +Options )
|
|
*
|
|
* read a term _T_ stored in text _Atomic_ according to _Options_
|
|
*
|
|
* @param _Atomic_ the source may be an atom, string, list of codes, or list
|
|
* of
|
|
* chars.
|
|
* @param _T_ the output term _T_, may be any term
|
|
* @param _Options_ read_term/3 options.
|
|
*
|
|
* @notes Idea originally from SWI-Prolog, but in YAP we separate atomic and
|
|
* atom.
|
|
* Encoding is fixed in atoms and strings.
|
|
*/
|
|
static Int read_term_from_atomic(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1);
|
|
const unsigned char *s;
|
|
|
|
if (IsVarTerm(t1))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t1, "read_term_from_atomic/3");
|
|
return(FALSE);
|
|
}
|
|
else if (!IsAtomicTerm(t1))
|
|
{
|
|
Yap_Error(TYPE_ERROR_ATOMIC, t1, "read_term_from_atomic/3");
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
Term t = Yap_AtomicToString(t1 PASS_REGS);
|
|
s = UStringOfTerm(t);
|
|
}
|
|
Term ctl = add_output(ARG2, ARG3);
|
|
|
|
return Yap_UBufferToTerm(s, ctl);
|
|
}
|
|
|
|
/**
|
|
* @pred read_term_from_string( +String , - T , + Options )
|
|
*
|
|
* read a term _T_ stored in constant _String_ according to _Options_
|
|
*
|
|
* @param _String_ the source _String_
|
|
* @param _T_ the output term _T_, may be any term
|
|
* @param _Options_ read_term/3 options.
|
|
*
|
|
* Idea from SWI-Prolog, in YAP only works with strings
|
|
* Check read_term_from_atomic/3 for the general version.
|
|
*/
|
|
static Int read_term_from_string(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1), rc;
|
|
const unsigned char *s;
|
|
size_t len;
|
|
|
|
BACKUP_H()
|
|
if (IsVarTerm(t1))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t1, "read_term_from_string/3");
|
|
return(FALSE);
|
|
}
|
|
else if (!IsStringTerm(t1))
|
|
{
|
|
Yap_Error(TYPE_ERROR_STRING, t1, "read_term_from_string/3");
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
s = UStringOfTerm(t1);
|
|
len = strlen_utf8(s);
|
|
}
|
|
char *ss = (char*)s;
|
|
encoding_t enc = ENC_ISO_UTF8;
|
|
int sno = Yap_open_buf_read_stream(ss, len, &enc, MEM_BUF_USER,
|
|
Yap_LookupAtom(Yap_StrPrefix(ss, 16)),
|
|
TermString);
|
|
GLOBAL_Stream[sno].status |= CloseOnException_Stream_f;
|
|
rc = Yap_read_term(sno, Deref(ARG3), 3);
|
|
Yap_CloseStream(sno);
|
|
RECOVER_H();
|
|
if (!rc)
|
|
return false;
|
|
return Yap_unify(rc, ARG2);
|
|
}
|
|
|
|
static Int atomic_to_term(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1);
|
|
int l = push_text_stack();
|
|
const unsigned char *s = Yap_TextToUTF8Buffer(t1 PASS_REGS);
|
|
Int rc = Yap_UBufferToTerm(s, add_output(ARG2, add_names(ARG3, TermNil)));
|
|
|
|
pop_text_stack(l);
|
|
return rc;
|
|
}
|
|
|
|
static Int atom_to_term(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1);
|
|
|
|
if (IsVarTerm(t1))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t1, "read_term_from_string/3");
|
|
return(FALSE);
|
|
}
|
|
else if (!IsAtomTerm(t1))
|
|
{
|
|
Yap_Error(TYPE_ERROR_ATOM, t1, "read_term_from_atomic/3");
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
Term t = Yap_AtomicToString(t1 PASS_REGS);
|
|
const unsigned char *us = UStringOfTerm(t);
|
|
return Yap_UBufferToTerm(us, add_output(ARG2, add_names(ARG3, TermNil)));
|
|
}
|
|
}
|
|
|
|
static Int string_to_term(USES_REGS1)
|
|
{
|
|
Term t1 = Deref(ARG1);
|
|
|
|
if (IsVarTerm(t1))
|
|
{
|
|
Yap_Error(INSTANTIATION_ERROR, t1, "read_term_from_string/3");
|
|
return(FALSE);
|
|
}
|
|
else if (!IsStringTerm(t1))
|
|
{
|
|
Yap_Error(TYPE_ERROR_STRING, t1, "read_term_from_string/3");
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
const unsigned char *us = UStringOfTerm(t1);
|
|
return Yap_UBufferToTerm(us, add_output(ARG2, add_names(ARG3, TermNil)));
|
|
}
|
|
}
|
|
|
|
void Yap_InitReadTPreds(void)
|
|
{
|
|
Yap_InitCPred("read_term", 2, read_term2, SyncPredFlag);
|
|
Yap_InitCPred("read_term", 3, read_term, SyncPredFlag);
|
|
|
|
Yap_InitCPred("scan_to_list", 2, scan_to_list, SyncPredFlag);
|
|
Yap_InitCPred("read", 1, read1, SyncPredFlag);
|
|
Yap_InitCPred("read", 2, read2, SyncPredFlag);
|
|
Yap_InitCPred("read_clause", 2, read_clause2, SyncPredFlag);
|
|
Yap_InitCPred("read_clause", 3, read_clause, 0);
|
|
Yap_InitCPred("read_term_from_atom", 3, read_term_from_atom, 0);
|
|
Yap_InitCPred("read_term_from_atomic", 3, read_term_from_atomic, 0);
|
|
Yap_InitCPred("read_term_from_string", 3, read_term_from_string, 0);
|
|
Yap_InitCPred("atom_to_term", 3, atom_to_term, 0);
|
|
Yap_InitCPred("atomic_to_term", 3, atomic_to_term, 0);
|
|
Yap_InitCPred("string_to_term", 3, string_to_term, 0);
|
|
|
|
Yap_InitCPred("fileerrors", 0, fileerrors, SyncPredFlag);
|
|
Yap_InitCPred("nofileeleerrors", 0, nofileerrors, SyncPredFlag);
|
|
Yap_InitCPred("source_location", 2, source_location, SyncPredFlag);
|
|
Yap_InitCPred("$style_checker", 1, style_checker,
|
|
SyncPredFlag | HiddenPredFlag);
|
|
}
|