/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 2015- *
* *
**************************************************************************
* *
* File: flags.c *
* Last rev: *
* mods: *
* comments: abstract machine definitions *
* *
*************************************************************************/
/** @file flags.c
@ingroup Flags
@{
*/
// this is where we define flags
#define INIT_FLAGS 1
#include "Yap.h"
static bool ro( Term inp );
static bool nat( Term inp );
static bool isatom( Term inp );
static bool boolean( Term inp );
//static bool string( Term inp );
//static bool list_atom( Term inp );
static bool list_option( Term inp );
static bool argv( Term inp );
static bool os_argv( Term inp );
static bool agc_threshold( Term inp );
static bool gc_margin( Term inp );
static bool executable( Term inp );
static bool sys_thread_id(Term inp);
static bool mkprompt(Term inp);
static bool synerr(Term inp);
static bool indexer(Term inp);
static bool getenc(Term inp);
static bool typein( Term inp );
static bool dqf( Term t2 );
static void newFlag( Term fl, Term val );
static Int current_prolog_flag(USES_REGS1);
static Int set_prolog_flag(USES_REGS1);
#include "Yatom.h"
#include "yapio.h"
#include "eval.h"
#define YAP_FLAG( ID, NAME, WRITABLE, DEF, INIT, HELPER ) { NAME, WRITABLE, DEF, INIT, HELPER }
#define GZERO_FLAG { NULL, false, NULL, NULL, NULL }
#define LZERO_FLAG { NULL, false, NULL, NULL, NULL }
static flag_info global_flags_setup[] = {
#include "YapGFlagInfo.h"
GZERO_FLAG
};
static flag_info local_flags_setup[] = {
#include "YapLFlagInfo.h"
LZERO_FLAG
};
static bool indexer( Term inp ) {
if (inp == TermOff ||
inp == TermSingle||
inp == TermCompact||
inp == TermMulti||
inp == TermOn||
inp == TermMax )
return true;
if (IsAtomTerm(inp)) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, inp, "set_prolog_flag index in {off,single,compact,multi,on,max}");
return false;
}
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag in {dec10,error,fail,quiet}");
return false;
}
static bool dqf1( ModEntry *new, Term t2 USES_REGS ) {
new->flags &= ~(DBLQ_CHARS|DBLQ_CODES|DBLQ_ATOM|DBLQ_STRING);
if (IsAtomTerm(t2) ) {
if (t2 == TermString) {
new->flags |= DBLQ_STRING;
return true;
} else if (t2 == TermAtom) {
new->flags |= DBLQ_ATOM;
return true;
} else if (t2 == TermCodes) {
new->flags |= DBLQ_CODES;
return true;
} else if (t2 == TermChars) {
new->flags |= DBLQ_CHARS;
return true;
}
/* bad argument, but still an atom */
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "bad option %s for backquoted string flag, use one string, arom, codes or chars", RepAtom(AtomOfTerm(t2))->StrOfAE);
return false;
} else {
Yap_Error(TYPE_ERROR_ATOM, t2, "set_prolog_flag(double_quotes, %s), should be {string,atom,codes,chars}", RepAtom(AtomOfTerm(t2))->StrOfAE);
return false;
}
}
static bool dqf( Term t2 ) {
CACHE_REGS
ModEntry *new = Yap_GetModuleEntry(CurrentModule);
return dqf1( new, t2 PASS_REGS);
}
static bool bqf1( ModEntry *new, Term t2 USES_REGS ) {
new->flags &= ~(BCKQ_CHARS|BCKQ_CODES|BCKQ_ATOM|BCKQ_STRING);
if (IsAtomTerm(t2)) {
if (t2 == TermString) {
new->flags |= BCKQ_STRING;
return true;
} else if (t2 == TermAtom) {
new->flags |= BCKQ_ATOM;
return true;
} else if (t2 == TermCodes) {
new->flags |= BCKQ_CODES;
return true;
} else if (t2 == TermChars) {
new->flags |= BCKQ_CHARS;
return true;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "bad option %s for backquoted string flag, use one string, arom, codes or chars", RepAtom(AtomOfTerm(t2))->StrOfAE);
return false;
} else {
Yap_Error(TYPE_ERROR_ATOM, t2, "flag %s is not module-scoped", RepAtom(AtomOfTerm(t2))->StrOfAE);
return false;
}
}
static bool isaccess( Term inp ) {
if (inp == TermReadWrite ||
inp == TermReadOnly )
return true;
if (IsAtomTerm(inp)) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, inp, "set_prolog_flag access in {read_write,read_only}");
return false;
}
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag access in {read_write,read_only}");
return false;
}
static bool isground( Term inp ) {
return Yap_IsGroundTerm( inp );
}
static bool flagscope( Term inp ) {
if (inp == TermGlobal ||
inp == TermThread ||
inp == TermModule)
return true;
if (IsAtomTerm(inp)) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, inp, "set_prolog_flag access in {global,module,thread}");
return false;
}
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag access in {global,module,thread}");
return false;
}
static bool mkprompt( Term inp ) {
CACHE_REGS
if (IsVarTerm(inp)) {
return Yap_unify( inp, MkAtomTerm( Yap_LookupAtom( LOCAL_Prompt )) );
}
if (!IsAtomTerm(inp) ) {
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag");
return false;
}
strncpy( LOCAL_Prompt, (const char *)RepAtom( AtomOfTerm( inp ) )->StrOfAE, MAX_PROMPT );
return true;
}
static bool getenc( Term inp ) {
CACHE_REGS
if (IsVarTerm(inp)) {
return Yap_unify( inp, MkAtomTerm( Yap_LookupAtom( enc_name(LOCAL_encoding) )) );
}
if (!IsAtomTerm(inp) ) {
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag");
return false;
}
enc_id( ( char *)RepAtom( AtomOfTerm( inp ) )->StrOfAE );
return true;
}
/*
static bool enablerl( Term inp ) {
CACHE_REGS
if (IsVarTerm(inp)) {
return Yap_unify( inp, MkAtomTerm( Yap_LookupAtom( enc_name(LOCAL_encoding) )) );
}
if (!IsAtomTerm(inp) ) {
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag");
return false;
}
enc_id( RepAtom( AtomOfTerm( inp ) )->StrOfAE );
return true;
}
*/
static bool typein( Term inp ) {
CACHE_REGS
if (IsVarTerm(inp)) {
Term tin = CurrentModule;
if (tin == PROLOG_MODULE)
tin = TermProlog;
return Yap_unify( inp, tin );
}
if (!IsAtomTerm(inp) ) {
Yap_Error(TYPE_ERROR_ATOM, inp, "set_prolog_flag");
return false;
}
CurrentModule = inp;
if (inp == TermProlog) CurrentModule = PROLOG_MODULE;
return true;
}
#if 0
static Int p_has_yap_or(USES_REGS1) {
#ifdef YAPOR
return (TRUE);
#else
return (FALSE);
#endif
}
static Int p_has_eam(USES_REGS1) {
#ifdef BEAM
return (TRUE);
#else
return (FALSE);
#endif
}
static Int p_has_jit(USES_REGS1) {
#ifdef HAS_JIT
return (TRUE);
#else
return (FALSE);
#endif
}
static bool tabling( Term inp ) {
if (value == 0) { /* default */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
TabEnt_mode(tab_ent) = TabEnt_flags(tab_ent);
tab_ent = TabEnt_next(tab_ent);
}
yap_flags[TA BLING_MODE_FLAG] = 0;
} else if (value == 1) { /* batched */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_Batched(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_Batched(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 2) { /* local */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_Local(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_Local(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 3) { /* exec_answers */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_ExecAnswers(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_ExecAnswers(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 4) { /* load_answers */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_LoadAnswers(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_LoadAnswers(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 5) { /* local_trie */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_LocalTrie(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_LocalTrie(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 6) { /* global_trie */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_GlobalTrie(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_GlobalTrie(yap_flags[TABLING_MODE_FLAG]);
} else if (value == 7) { /* CoInductive */
tab_ent_ptr tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
SetMode_CoInductive(TabEnt_mode(tab_ent));
tab_ent = TabEnt_next(tab_ent);
}
SetMode_CoInductive(yap_flags[TABLING_MODE_FLAG]);
}
}
static bool string( Term inp ) {
if (IsVarTerm(inp)) {
Yap_Error(INSTANTIATION_ERROR, inp, "set_prolog_flag in \"...\"");
return false;
}
if (IsStringTerm( inp ))
return true;
Term inp0 = inp;
if (IsPairTerm(inp)) {
Term hd = HeadOfTerm(inp);
if (IsAtomTerm(hd)) {
do {
Term hd = HeadOfTerm(inp);
if (!IsAtomTerm(hd)) {
Yap_Error(TYPE_ERROR_TEXT, inp0, "set_prolog_flag in \"...\"");
return false;
}
} while (IsPairTerm( inp ) );
} else if (IsIntTerm(hd)) {
do {
Term hd = HeadOfTerm(inp);
if (!IsIntTerm(hd)) {
Yap_Error(TYPE_ERROR_TEXT, inp0, "set_prolog_flag in \"...\"");
return false;
}
if (IntOfTerm(hd) < 0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO, inp0, "set_prolog_flag in 0...");
return false;
}
} while (IsPairTerm( inp ) );
} else {
Yap_Error(TYPE_ERROR_TEXT, inp0, "set_prolog_flag in \"...\"");
return false;
}
}
if ( inp != TermNil ) {
Yap_Error(TYPE_ERROR_TEXT, inp0, "set_prolog_flag in \"...\"");
return false;
}
return true;
}
static bool list_atom( Term inp ) {
if (IsVarTerm(inp)) {
Yap_Error(INSTANTIATION_ERROR, inp, "set_prolog_flag in \"...\"");
return false;
}
Term inp0 = inp;
if (IsPairTerm(inp)) {
Term hd = HeadOfTerm(inp);
do {
if (!IsAtomTerm(hd)) {
Yap_Error(TYPE_ERROR_ATOM, inp0, "set_prolog_flag in \"...\"");
return false;
}
} while (IsPairTerm( inp ) );
}
if ( inp != TermNil ) {
Yap_Error(TYPE_ERROR_LIST, inp0, "set_prolog_flag in [...]");
return false;
}
return true;
}
#endif
static bool list_option( Term inp ) {
if (IsVarTerm(inp)) {
Yap_Error(INSTANTIATION_ERROR, inp, "set_prolog_flag in \"...\"");
return false;
}
Term inp0 = inp;
if (IsPairTerm(inp)) {
do {
Term hd = HeadOfTerm(inp);
inp = TailOfTerm(inp);
if (IsAtomTerm(hd)) {
continue;
}
if(IsApplTerm(hd)) {
Functor f = FunctorOfTerm(hd);
if (!IsExtensionFunctor(f) &&
ArityOfFunctor(f) == 1 &&
Yap_IsGroundTerm(hd)) {
continue;
}
if (!Yap_IsGroundTerm(hd))
Yap_Error(INSTANTIATION_ERROR, hd, "set_prolog_flag in \"...\"");
return false;
}
} while (IsPairTerm( inp ) );
if ( inp == TermNil ) {
return true;
}
Yap_Error(TYPE_ERROR_LIST, inp0, "set_prolog_flag in [...]");
return false;
} else /* lone option */ {
if (IsAtomTerm(inp)) {
return true;
} else if(IsApplTerm(inp)) {
Functor f = FunctorOfTerm(inp);
if (!IsExtensionFunctor(f) &&
ArityOfFunctor(f) == 1 &&
Yap_IsGroundTerm(ArgOfTerm(1, inp))) {
return true;
}
}
}
return false;
}
static bool agc_threshold( Term t ) {
t = Deref(t);
if (IsVarTerm(t)) {
CACHE_REGS
return Yap_unify(t, MkIntegerTerm(GLOBAL_AGcThreshold));
} else if (!IsIntegerTerm(t)) {
Yap_Error(TYPE_ERROR_INTEGER,t,"prolog_flag/2 agc_margin");
return FALSE;
} else {
Int i = IntegerOfTerm(t);
if (i<0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,t,"prolog_flag/2 agc_margin");
return FALSE;
} else {
GLOBAL_AGcThreshold = i;
return TRUE;
}
}
}
static bool gc_margin( Term t ) {
t = Deref(t);
if (IsVarTerm(t)) {
return Yap_unify(t, Yap_GetValue(AtomGcMargin));
} else if (!IsIntegerTerm(t)) {
Yap_Error(TYPE_ERROR_INTEGER,t,"prolog_flag/2 agc_margin");
return FALSE;
} else {
Int i = IntegerOfTerm(t);
if (i<0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,t,"prolog_flag/2 gc_margin");
return FALSE;
} else {
CACHE_REGS
Yap_PutValue(AtomGcMargin, MkIntegerTerm( i ));
return TRUE;
}
}
}
static Term mk_argc_list(USES_REGS1) {
int i = 1;
Term t = TermNil;
while (i < GLOBAL_argc) {
char *arg = GLOBAL_argv[i];
/* check for -L -- */
if (arg[0] == '-' && arg[1] == 'L') {
arg += 2;
while (*arg != '\0' && (*arg == ' ' || *arg == '\t'))
arg++;
if (*arg == '-' && arg[1] == '-' && arg[2] == '\0') {
/* we found the separator */
int j;
for (j = GLOBAL_argc - 1; j > i + 1; --j) {
t = MkPairTerm(MkAtomTerm(Yap_LookupAtom(GLOBAL_argv[j])), t);
}
return t;
} else if (GLOBAL_argv[i + 1] && GLOBAL_argv[i + 1][0] == '-' &&
GLOBAL_argv[i + 1][1] == '-' &&
GLOBAL_argv[i + 1][2] == '\0') {
/* we found the separator */
int j;
for (j = GLOBAL_argc - 1; j > i + 2; --j) {
t = MkPairTerm(MkAtomTerm(Yap_LookupAtom(GLOBAL_argv[j])), t);
}
return t;
}
}
if (arg[0] == '-' && arg[1] == '-' && arg[2] == '\0') {
/* we found the separator */
int j;
for (j = GLOBAL_argc - 1; j > i; --j) {
t = MkPairTerm(MkAtomTerm(Yap_LookupAtom(GLOBAL_argv[j])), t);
}
return (t);
}
i++;
}
return (t);
}
static Term mk_os_argc_list(USES_REGS1) {
int i = 0;
Term t = TermNil;
for (i = 0; i < GLOBAL_argc; i++) {
char *arg = GLOBAL_argv[i];
t = MkPairTerm(MkAtomTerm(Yap_LookupAtom(arg)), t);
}
return (t);
}
static bool argv(Term inp) {
CACHE_REGS
Term t = mk_argc_list(PASS_REGS1);
if (IsAtomOrIntTerm(t))
GLOBAL_Flags[ARGV_FLAG].at = t;
else {
GLOBAL_Flags[ARGV_FLAG].DBT = Yap_StoreTermInDB(t, 2);
}
return false;
}
static bool os_argv(Term inp) {
CACHE_REGS
Term t = mk_os_argc_list(PASS_REGS1);
if (IsAtomOrIntTerm(t))
GLOBAL_Flags[OS_ARGV_FLAG].at = t;
else {
GLOBAL_Flags[OS_ARGV_FLAG].DBT = Yap_StoreTermInDB(t, 2);
}
return false;
}
static FlagEntry *
GetFlagProp(Atom a )
{ /* look property list of atom a for kind */
AtomEntry *ae = RepAtom(a);
FlagEntry *pp;
READ_LOCK(ae->ARWLock);
pp = RepFlagProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp) && pp->KindOfPE != FlagProperty)
pp = RepFlagProp(pp->NextOfPE);
READ_UNLOCK(ae->ARWLock);
return pp;
}
static void
initFlag(flag_info *f, int fnum, bool global)
{
Atom name = Yap_LookupAtom( f->name );
AtomEntry *ae = RepAtom(name);
WRITE_LOCK(ae->ARWLock);
FlagEntry * fprop = RepFlagProp(Yap_GetAPropHavingLock( name, FlagProperty ) );
if (fprop == NULL) {
fprop = (FlagEntry *) Yap_AllocAtomSpace(sizeof(FlagEntry));
if (fprop == NULL) {
WRITE_UNLOCK(ae->ARWLock);
Yap_Error(RESOURCE_ERROR_HEAP,TermNil,"not enough space for new Flag %s", ae->StrOfAE); return;
}
fprop->KindOfPE = FlagProperty;
fprop->FlagOfVE = fnum;
fprop->rw = f->writable;
fprop->global = global;
fprop->type = f->def;
fprop->helper = f->helper;
AddPropToAtom(ae, AbsFlagProp(fprop));
}
WRITE_UNLOCK(ae->ARWLock);
}
static bool executable(Term inp) {
CACHE_REGS
if (GLOBAL_argv && GLOBAL_argv[0])
Yap_TrueFileName(GLOBAL_argv[0], LOCAL_FileNameBuf, FALSE);
else
strncpy(LOCAL_FileNameBuf, Yap_FindExecutable(), YAP_FILENAME_MAX - 1);
return Yap_unify(MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf)), inp);
}
static bool sys_thread_id(Term inp)
{
CACHE_REGS
int pid;
#ifdef HAVE_GETTID_SYSCALL
pid = syscall(__NR_gettid);
#elif defined(HAVE_GETTID_MACRO)
pid = gettid();
#elif defined(__WINDOWS__)
pid = GetCurrentThreadId();
#else
pid = 0;
#endif
return Yap_unify(MkIntegerTerm(pid), inp);
}
static bool setYapFlagInModule( Term tflag, Term t2, Term mod )
{
CACHE_REGS
FlagEntry *fv;
ModEntry *new = Yap_GetModuleEntry(mod);
if (!new)
return false;
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (!fv && !fv->global) {
Yap_Error(DOMAIN_ERROR_PROLOG_FLAG, tflag, "trying to set unknown module flag");
return false;
}
if (mod == USER_MODULE && !setYapFlag( tflag, t2) )
return false;
// module specific stuff now
if (fv->FlagOfVE == UNKNOWN_FLAG) {
if (t2 == TermError) {
new->flags &= ~(UNKNOWN_FAIL|UNKNOWN_WARNING);
new->flags |= (UNKNOWN_ERROR);
return true;
} else if (t2 == TermFail) {
new->flags &= ~(UNKNOWN_ERROR|UNKNOWN_WARNING);
new->flags |= (UNKNOWN_FAIL);
return true;
} else if (t2 == TermWarning) {
new->flags &= ~(UNKNOWN_ERROR|UNKNOWN_FAIL);
new->flags |= (UNKNOWN_WARNING);
return true;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "bad option %s for unknown flag, use one of error, fail or warning.", RepAtom(AtomOfTerm(tflag))->StrOfAE);
return false;
} else if (fv->FlagOfVE == DOUBLE_QUOTES_FLAG) {
return dqf1( new, t2 PASS_REGS );
} else if (fv->FlagOfVE == CHARACTER_ESCAPES_FLAG) {
if (t2 == TermTrue) {
new->flags |= M_CHARESCAPE;
return true;
} else if (t2 == TermFalse) {
new->flags &= ~(M_CHARESCAPE);
return true;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "bad option %s for character_escapes flag, use true or false", RepAtom(AtomOfTerm(tflag))->StrOfAE);
return false;
} else if (fv->FlagOfVE == BACKQUOTED_STRING_FLAG) {
return bqf1( new, t2 PASS_REGS );;
}
// bad key?
return false;
}
static Term getYapFlagInModule( Term tflag, Term mod )
{
FlagEntry *fv;
ModEntry *new = Yap_GetModuleEntry(mod);
if (!mod)
return false;
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (!fv && !fv->global) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, tflag, "trying to set unknown flag");
return 0L;
}
// module specific stuff now
if (fv->FlagOfVE == UNKNOWN_FLAG) {
if (new->flags & UNKNOWN_ERROR)
return TermError;
if (new->flags & UNKNOWN_WARNING)
return TermWarning;
return TermFail;
} else if (fv->FlagOfVE == CHARACTER_ESCAPES_FLAG) {
if (new->flags & M_CHARESCAPE)
return TermTrue;
} else if (fv->FlagOfVE == BACKQUOTED_STRING_FLAG) {
if (new->flags & BCKQ_CHARS)
return TermChars;
if (new->flags & BCKQ_CODES)
return TermCodes;
if (new->flags & BCKQ_ATOM)
return TermAtom;
return TermString;
} else if (fv->FlagOfVE == DOUBLE_QUOTES_FLAG) {
if (new->flags & DBLQ_CHARS)
return TermChars;
if (new->flags & DBLQ_CODES)
return TermCodes;
if (new->flags & DBLQ_ATOM)
return TermAtom;
return TermString;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, tflag, "flag %s is not module-scoped", RepAtom(AtomOfTerm(tflag))->StrOfAE);
return 0L;
}
static Int cont_yap_flag( USES_REGS1) {
int i = IntOfTerm (EXTRA_CBACK_ARG (2, 1));
int gmax = GLOBAL_flagCount;
int lmax = LOCAL_flagCount;
Term tflag = Deref(ARG1);
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (i+1);
if (IsApplTerm( tflag ) && FunctorOfTerm(tflag) == FunctorModule) {
Term modt = CurrentModule;
tflag = Yap_StripModule( tflag, &modt );
while (i != gmax &&
i != UNKNOWN_FLAG &&
i != CHARACTER_ESCAPES_FLAG &&
i != BACKQUOTED_STRING_FLAG) i++;
if (i == gmax) cut_fail();
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (i+1);
{
Term lab = MkAtomTerm( Yap_LookupAtom( global_flags_setup[i].name ) ) ;
Term val = Deref(ARG2);
if (! Yap_unify(tflag, lab) )
return false;
if (IsVarTerm(val)) {
Term oval = getYapFlagInModule( lab, modt );
if (oval == 0)
return false;
return Yap_unify( oval, val );
} else {
return setYapFlagInModule( tflag, val, modt );
}
}
return false;
}
if (i >= gmax ) {
Yap_unify( ARG1, MkAtomTerm( Yap_LookupAtom(local_flags_setup[i-gmax].name ) ) );
if (i == gmax+lmax-1)
do_cut(0);
} else {
Yap_unify( ARG1, MkAtomTerm( Yap_LookupAtom( global_flags_setup[i].name ) ) );
}
Term flag = getYapFlag( Deref(ARG1) );
return Yap_unify( flag, ARG2 );
}
static Int yap_flag(USES_REGS1) {
Term tflag = Deref(ARG1);
if (IsVarTerm( tflag ) ) {
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (0);
return cont_yap_flag( PASS_REGS1 );
}
if (IsApplTerm( tflag ) && FunctorOfTerm(tflag) == FunctorModule) {
Term modt;
tflag = Yap_StripModule( tflag, &modt );
if (IsVarTerm(tflag)) {
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (0);
return cont_yap_flag( PASS_REGS1 );
}
do_cut( 0 );
if (!isatom(tflag)) return false;
if (!isatom(modt)) return false;
if (IsVarTerm(Deref(ARG2))) {
Term flag = getYapFlagInModule( tflag, modt );
if (flag == 0)
return false;
return Yap_unify( flag, ARG2 );
} else {
return setYapFlagInModule( tflag, Deref(ARG2), modt );
}
}
do_cut( 0 );
if (IsVarTerm(Deref(ARG2))) {
Term flag = getYapFlag( Deref(ARG1) );
if (flag == 0)
return false;
return Yap_unify( flag, ARG2 );
}
return set_prolog_flag( PASS_REGS1 );
}
static Int cont_prolog_flag(USES_REGS1) {
int i = IntOfTerm (EXTRA_CBACK_ARG (3, 1));
while (i < GLOBAL_flagCount+LOCAL_flagCount) {
int gmax = GLOBAL_flagCount;
int lmax = LOCAL_flagCount;
Term flag, f;
if (i >= gmax+lmax) {
cut_fail();
} else if (i >= gmax) {
Yap_unify( ARG1, ( f = MkAtomTerm( Yap_LookupAtom(local_flags_setup[i-gmax].name ) ) ));
} else {
Yap_unify( ARG1, (f = MkAtomTerm( Yap_LookupAtom( global_flags_setup[i].name ) ) ) );
}
EXTRA_CBACK_ARG (3, 1) = MkIntTerm (++i);
flag = getYapFlag( f );
if (! Yap_unify( f, ARG2 ) )
return false;
return setYapFlag( f, Deref(ARG3) );
}
cut_fail();
}
/** @pred prolog_flag(? _Flag_,- _OldValue_,+ _NewValue_)
Obtain the value for a YAP Prolog flag and then set it to a new
value. Equivalent to first calling current_prolog_flag/2 with the
second argument _OldValue_ unbound and then calling
set_prolog_flag/2 with the third argument _NewValue_.
*/
static Int prolog_flag(USES_REGS1) {
if (IsVarTerm( Deref(ARG1) ) ) {
EXTRA_CBACK_ARG (3, 1) = MkIntTerm (0);
return cont_prolog_flag( PASS_REGS1 );
}
do_cut( 0 );
if (IsVarTerm( Deref(ARG2) ) ) {
Term flag = getYapFlag( Deref(ARG1) );
if (flag == 0)
return false;
return Yap_unify( flag, ARG2 ) ;
}
return setYapFlag( Deref(ARG1), Deref(ARG3) );
}
/** @pred current_prolog_flag(? _Flag_,- _Value_) is iso
Obtain the value for a YAP Prolog flag. Equivalent to calling
yap_flag/2 with the second argument unbound, and unifying the
returned second argument with _Value_.
*/
static Int current_prolog_flag( USES_REGS1 ) {
Term tflag = Deref(ARG1);
Term tout = 0;
FlagEntry *fv;
flag_term *tarr;
if (IsVarTerm(tflag)) {
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (0);
return cont_yap_flag( PASS_REGS1 );
}
do_cut( 0 );
if (!IsAtomTerm(tflag)) {
Yap_Error(TYPE_ERROR_ATOM, tflag, "current_prolog_flag/3");
return (FALSE);
}
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (!fv) {
// should itself depend on a flag
return FALSE;
}
if (fv->global)
tarr = GLOBAL_Flags;
else
tarr = LOCAL_Flags;
tout = tarr[fv->FlagOfVE].at;
if (IsVarTerm(tout))
tout = Yap_FetchTermFromDB(tarr[fv->FlagOfVE].DBT);
return (Yap_unify(ARG2, tout));
}
void Yap_setModuleFlags(ModEntry *new, ModEntry *cme)
{
CACHE_REGS
Atom at = new->AtomOfME;
if (at == AtomProlog || CurrentModule == PROLOG_MODULE) {
new->flags = M_SYSTEM | UNKNOWN_ERROR |M_CHARESCAPE | DBLQ_CODES | BCKQ_STRING;
if (at == AtomUser)
new->flags = UNKNOWN_ERROR |M_CHARESCAPE | DBLQ_CODES | BCKQ_STRING;
} else if (cme &&
cme->flags && cme != new) {
new->flags = cme->flags;
} else {
new->flags = ( UNKNOWN_ERROR | M_CHARESCAPE | DBLQ_CODES | BCKQ_STRING
);
}
//printf("cme=%s new=%s flags=%x\n",cme,at->StrOfAE,new->flags);
}
bool setYapFlag( Term tflag, Term t2 )
{
FlagEntry *fv;
flag_term *tarr;
if (IsVarTerm(tflag)) {
Yap_Error(INSTANTIATION_ERROR, tflag, "yap_flag/2");
return (FALSE);
}
if (IsApplTerm( tflag ) && FunctorOfTerm(tflag) == FunctorModule) {
Term modt;
tflag = Yap_StripModule( tflag, &modt );
if (!isatom(tflag)) return false;
if (!isatom(modt)) return false;
return setYapFlagInModule( tflag, t2, modt );
}
if (!IsAtomTerm(tflag)) {
Yap_Error(TYPE_ERROR_ATOM, tflag, "yap_flag/2");
return (FALSE);
}
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (!fv) {
Term fl = GLOBAL_Flags[USER_FLAGS_FLAG].at;
if (fl == TermSilent) {
CACHE_REGS
Term t2 = Deref(ARG2);
newFlag( tflag, t2);
} else if (fl == TermWarning) {
Yap_Warning("Flag %s does not exist", RepAtom(AtomOfTerm(fl))->StrOfAE);
} else {
Yap_Error(DOMAIN_ERROR_PROLOG_FLAG, fl, "trying to set unknown flag ~s", AtomName(AtomOfTerm(fl)));
}
return FALSE;
}
if (fv->global)
tarr = GLOBAL_Flags;
else {
CACHE_REGS
tarr = LOCAL_Flags;
}
if (!(fv->type(t2)))
return false;
if (fv->helper && !(fv->helper(t2)))
return false;
Term tout = tarr[fv->FlagOfVE].at;
if (IsVarTerm(tout))
Yap_PopTermFromDB( tarr[fv->FlagOfVE].DBT );
if (IsAtomOrIntTerm(t2))
tarr[fv->FlagOfVE].at = t2;
else {
tarr[fv->FlagOfVE].DBT = Yap_StoreTermInDB(t2, 2);
}
return true;
}
Term getYapFlag( Term tflag )
{
FlagEntry *fv;
flag_term *tarr;
if (IsVarTerm(tflag)) {
Yap_Error(INSTANTIATION_ERROR, tflag, "yap_flag/2");
return (FALSE);
}
if (IsApplTerm( tflag ) && FunctorOfTerm(tflag) == FunctorModule) {
Term modt;
tflag = Yap_StripModule( tflag, &modt );
if (!isatom(tflag)) return false;
if (!isatom(modt)) return false;
return getYapFlagInModule( tflag, modt );
}
if (!IsAtomTerm(tflag)) {
Yap_Error(TYPE_ERROR_ATOM, tflag, "yap_flag/2");
return (FALSE);
}
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (!fv) {
Term fl = GLOBAL_Flags[USER_FLAGS_FLAG].at;
if (fl == TermSilent) {
return false;
} else if (fl == TermWarning) {
Yap_Warning("Flag ~s does not exist", RepAtom(AtomOfTerm(fl))->StrOfAE);
} else {
Yap_Error(DOMAIN_ERROR_PROLOG_FLAG, fl, "trying to read unknown flag %s",
RepAtom(AtomOfTerm(fl))->StrOfAE);
}
return FALSE;
}
if (fv->global)
tarr = GLOBAL_Flags;
else {
CACHE_REGS
tarr = LOCAL_Flags;
}
Term tout = tarr[fv->FlagOfVE].at;
if (IsVarTerm(tout))
return Yap_FetchTermFromDB( tarr[fv->FlagOfVE].DBT );
else
return tout;
}
/** @pred set_prolog_flag(+ _Flag_,+ _Value_) is iso
Set the value for YAP Prolog flag `Flag`. Equivalent to
calling yap_flag/2 with both arguments bound.
*/
static Int set_prolog_flag(USES_REGS1) {
Term tflag = Deref(ARG1), t2 = Deref(ARG2);
return setYapFlag( tflag, t2 );
}
/** @pred source
After executing this goal, YAP keeps information on the source
of the predicates that will be consulted. This enables the use of
[listing/0](@ref listing), `listing/1` and [clause/2](@ref clause) for those
clauses.
The same as `source_mode(_,on)` or as declaring all newly defined
static procedures as `public`.
*/
static Int source(USES_REGS1) {
setBooleanGlobalPrologFlag(SOURCE_FLAG, true);
return true;
}
/** @pred no_source
The opposite to `source`.
The same as `source_mode(_,off)`.
*/
static Int no_source(USES_REGS1) {
setBooleanGlobalPrologFlag(SOURCE_FLAG, false);
return true;
}
/**
@pred source_mode(- _O_,+ _N_)
The state of source mode can either be on or off. When the source mode
is on, all clauses are kept both as compiled code and in a "hidden"
database. _O_ is unified with the previous state and the mode is set
according to _N_.
*/
static Int
source_mode( USES_REGS1 )
{
Term targ;
bool current = trueGlobalPrologFlag(SOURCE_FLAG);
if (current && !Yap_unify_constant( ARG1, TermTrue ) )
return false;
if (!current && !Yap_unify_constant( ARG1, TermFalse) )
return false;
targ = Deref(ARG2);
setYapFlag( TermSource, ARG2 );
return true;
}
static bool
setInitialValue( bool bootstrap, flag_func f, const char *s,flag_term *tarr )
{
errno = 0;
if (f == boolean) {
if (!bootstrap) { return 0; }
if (!strcmp(s, "true")) {
tarr->at = TermTrue;
return true;
}
if (!strcmp(s, "false")) {
tarr->at = TermFalse;
return true;
}
if (!strcmp(s, "on")) {
tarr->at = TermTrue;
return true;
}
if (!strcmp(s, "off")) {
tarr->at = TermFalse;
return true;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, TermNil, "~s should be either true (on) or false (off)", s);
return false;
} else if (f == nat) {
if (!bootstrap) { return 0; }
UInt r = strtoul(s, NULL, 10);
Term t;
if (errno) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, TermNil, "~s should be a positive integer)", s);
return false;
}
CACHE_REGS
t= MkIntegerTerm(r);
if (IsIntTerm(t))
tarr->at = t;
else {
tarr->DBT = Yap_StoreTermInDB(t, 2);
}
return true;
} else if (f == at2n) {
if (!bootstrap) { return 0; }
if (!strcmp(s, "INT_MAX")) {
tarr->at = MkIntTerm(Int_MAX);
return true;
}
if (!strcmp(s, "MAX_THREADS")) {
tarr->at = MkIntTerm(MAX_THREADS);
return true;
}
if (!strcmp(s, "MAX_WORKERS")) {
tarr->at = MkIntTerm(MAX_WORKERS);
return true;
}
if (!strcmp(s, "INT_MIN")) {
tarr->at = MkIntTerm(Int_MIN);
return true;
}
if (!strcmp(s, "YAP_NUMERIC_VERSION")) {
tarr->at = MkIntTerm(atol(YAP_NUMERIC_VERSION));
return true;
}
if (!strcmp(s, "YAP_NUMERIC_VERSION")) {
tarr->at = MkIntTerm(atol(YAP_NUMERIC_VERSION));
return true;
}
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, TermNil, "~s should be either true (on) or false (off)", s);
return false;
} else if (f == isatom) {
if (!bootstrap) { return false; }
Atom r = Yap_LookupAtom(s);
if (errno) {
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, TermNil, "~s should be a positive integer)", s);
tarr->at = TermNil;
}
tarr->at = MkAtomTerm( r );
return true;
} else {
Term t0;
if (bootstrap) { return false; }
CACHE_REGS
t0 = Yap_StringToTerm(s, strlen(s)+1, &LOCAL_encoding, 1200, NULL);
if (!t0)
return false;
if (IsAtomTerm(t0) || IsIntTerm(t0)) {
// do yourself flags
if (t0 == MkAtomTerm(AtomQuery)) {
f(TermNil);
} else {
tarr->at = t0;
}
} else {
tarr->DBT = Yap_StoreTermInDB(t0, 2);
}
return true;
}
}
#define PROLOG_FLAG_PROPERTY_DEFS() \
PAR( "access", isaccess, PROLOG_FLAG_PROPERTY_ACCESS, "read_write" ), \
PAR( "type", isground, PROLOG_FLAG_PROPERTY_TYPE, "term" ), \
PAR( "scope", flagscope, PROLOG_FLAG_PROPERTY_SCOPE, "global" ), \
PAR( "keep", boolean, PROLOG_FLAG_PROPERTY_KEEP, "false" ), \
PAR( NULL, ok, PROLOG_FLAG_PROPERTY_END, 0 )
#define PAR(x,y,z,w) z
typedef enum prolog_flag_property_enum_choices
{
PROLOG_FLAG_PROPERTY_DEFS()
} prolog_flag_property_choices_t;
#undef PAR
#define PAR(x,y,z, w) { x , y, z, w }
static const param2_t prolog_flag_property_defs[] =
{
PROLOG_FLAG_PROPERTY_DEFS()
};
#undef PAR
static Int
do_prolog_flag_property (Term tflag, Term opts USES_REGS)
{ /* Init current_prolog_flag */
FlagEntry *fv;
xarg *args;
prolog_flag_property_choices_t i;
bool rc = true;
args = Yap_ArgList2ToVector ( opts, prolog_flag_property_defs, PROLOG_FLAG_PROPERTY_END );
if (args == NULL) {
return FALSE;
}
if (!IsAtomTerm(tflag)) {
if (IsApplTerm( tflag ) && FunctorOfTerm(tflag) == FunctorModule) {
Term modt = CurrentModule;
tflag = Yap_YapStripModule( tflag, &modt );
} else {
Yap_Error(TYPE_ERROR_ATOM, tflag, "yap_flag/2");
return (FALSE);
}
}
fv = GetFlagProp( AtomOfTerm( tflag ) );
for (i=0; i < PROLOG_FLAG_PROPERTY_END; i ++) {
if (args[i].used) {
switch (i) {
case PROLOG_FLAG_PROPERTY_ACCESS:
if (fv->rw)
rc = rc &&
Yap_unify(TermReadWrite, args[PROLOG_FLAG_PROPERTY_ACCESS].tvalue);
else
rc = rc &&
Yap_unify(TermReadOnly, args[PROLOG_FLAG_PROPERTY_ACCESS].tvalue);
break;
case PROLOG_FLAG_PROPERTY_TYPE:
if (fv->type == boolean)
rc = rc &&
Yap_unify(TermBoolean, args[PROLOG_FLAG_PROPERTY_TYPE].tvalue);
else if (fv->type == isatom)
rc = rc &&
Yap_unify(TermAtom, args[PROLOG_FLAG_PROPERTY_TYPE].tvalue);
else if (fv->type == nat)
rc = rc &&
Yap_unify(TermInteger, args[PROLOG_FLAG_PROPERTY_TYPE].tvalue);
else if (fv->type == isfloat)
rc = rc &&
Yap_unify(TermFloat, args[PROLOG_FLAG_PROPERTY_TYPE].tvalue);
else
rc = rc &&
Yap_unify(TermTerm, args[PROLOG_FLAG_PROPERTY_TYPE].tvalue);
break;
case PROLOG_FLAG_PROPERTY_KEEP:
rc = rc && false;
break;
case PROLOG_FLAG_PROPERTY_SCOPE:
if (fv->global) {
if (fv->FlagOfVE == UNKNOWN_FLAG ||
fv->FlagOfVE == CHARACTER_ESCAPES_FLAG ||
fv->FlagOfVE == BACKQUOTED_STRING_FLAG)
Yap_unify(TermModule, args[PROLOG_FLAG_PROPERTY_SCOPE].tvalue);
rc = rc &&
Yap_unify(TermGlobal, args[PROLOG_FLAG_PROPERTY_SCOPE].tvalue);
} else
rc = rc &&
Yap_unify(TermThread, args[PROLOG_FLAG_PROPERTY_SCOPE].tvalue);
break;
case PROLOG_FLAG_PROPERTY_END:
/* break; */
Yap_Error(DOMAIN_ERROR_PROLOG_FLAG, opts, "Flag not supported by YAP");
}
}
}
// UNLOCK(GLOBAL_Prolog_Flag[sno].prolog_flaglock);
return rc;
}
static Int
cont_prolog_flag_property (USES_REGS1)
{ /* current_prolog_flag */
int i = IntOfTerm (EXTRA_CBACK_ARG (2, 1));
while (i < GLOBAL_flagCount+LOCAL_flagCount) {
int gmax = GLOBAL_flagCount;
int lmax = LOCAL_flagCount;
Term lab;
if (i >= gmax+lmax) {
cut_fail();
} else if (i >= gmax) {
lab = MkAtomTerm( Yap_LookupAtom( local_flags_setup[i-gmax].name ) ) ;
} else {
if (i == UNKNOWN_FLAG ||
i == CHARACTER_ESCAPES_FLAG ||
i == BACKQUOTED_STRING_FLAG) {
Term labs[2];
labs[0] = MkVarTerm();
labs[1] = MkAtomTerm( Yap_LookupAtom( global_flags_setup[i].name ) ) ;
lab = Yap_MkApplTerm(FunctorModule, 2, labs);
} else {
lab = MkAtomTerm( Yap_LookupAtom( global_flags_setup[i].name ) ) ;
}
}
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (++i);
Yap_unify(ARG1, lab);
return do_prolog_flag_property(lab, Deref(ARG2) PASS_REGS);
}
cut_fail();
}
/** @pred prolog_flag_property(+ _Flag_,+ _Prooperties_)
Report a property for a YAP Prolog flag. _Properties_ include
* `type(+_Type_)` with _Type_ one of `boolean`, `integer`, `float`, `atom`
and `term` (that is, any ground term)
* `access(+_Access_)` with _Access_ one of `read_only` or `read_write`
* `scope(+_Scope_) the flag aplies to a `thread`, to a `module`, or is `global` to the system.
*/
static Int
prolog_flag_property (USES_REGS1)
{ /* Init current_prolog_flag */
Term t1 = Deref(ARG1);
/* make valgrind happy by always filling in memory */
EXTRA_CBACK_ARG (2, 1) = MkIntTerm (0);
if (IsVarTerm(t1)) {
return (cont_prolog_flag_property (PASS_REGS1));
} else {
if (IsApplTerm( t1 ) && FunctorOfTerm(t1) == FunctorModule) {
Term modt;
t1 = Yap_StripModule( t1, &modt );
if (IsAtomTerm( modt )) {
Int rc;
rc = cont_prolog_flag_property( PASS_REGS1 );
return rc;
}
} else if (IsAtomTerm(t1)) {
do_cut(0);
return do_prolog_flag_property( t1, Deref(ARG2) PASS_REGS);
} else {
Yap_Error(TYPE_ERROR_ATOM, t1, "prolog_flag_property/2");
}
}
return false;
}
static void
newFlag( Term fl, Term val )
{
flag_info f;
int i = GLOBAL_flagCount;
GLOBAL_flagCount ++;
f.name = (char *)RepAtom(AtomOfTerm(fl))->StrOfAE;
f.writable = true;
f.helper = 0;
f.def = ok;
initFlag(&f, i , true);
if (IsAtomOrIntTerm(val)) {
GLOBAL_Flags[i].at = val;
} else {
GLOBAL_Flags[i].DBT = Yap_StoreTermInDB(val, 2);
}
}
static Int
do_create_prolog_flag( USES_REGS1 )
{
FlagEntry *fv;
xarg *args;
prolog_flag_property_choices_t i;
Term tflag = Deref(ARG1), tval = Deref(ARG2), opts = Deref(ARG3);
args = Yap_ArgList2ToVector ( opts, prolog_flag_property_defs, PROLOG_FLAG_PROPERTY_END );
if (args == NULL) {
return FALSE;
}
fv = GetFlagProp( AtomOfTerm( tflag ) );
if (fv) {
if (args[PROLOG_FLAG_PROPERTY_KEEP].used && args[PROLOG_FLAG_PROPERTY_KEEP].tvalue == TermTrue)
return true;
} else {
newFlag( tflag, tval );
fv = GetFlagProp( AtomOfTerm( tflag ) );
}
for (i=0; i < PROLOG_FLAG_PROPERTY_END; i ++) {
if (args[i].used) {
switch (i) {
case PROLOG_FLAG_PROPERTY_KEEP:
break;
case PROLOG_FLAG_PROPERTY_ACCESS:
if (args[PROLOG_FLAG_PROPERTY_ACCESS].tvalue == TermReadWrite)
fv->rw = true;
else
fv->rw = false;
break;
case PROLOG_FLAG_PROPERTY_TYPE:
{
Term ttype = args[PROLOG_FLAG_PROPERTY_TYPE].tvalue;
if (ttype == TermBoolean)
fv->type = boolean;
else if (ttype == TermInteger)
fv->type = isatom;
else if (ttype == TermFloat)
fv->type = isfloat;
else
fv->type = isground;
}
break;
case PROLOG_FLAG_PROPERTY_SCOPE:
return
false;
case PROLOG_FLAG_PROPERTY_END:
break;
}
}
}
//UNLOCK(GLOBAL_Prolog_Flag[sno].prolog_flaglock);
return true;
}
/**
* Init System Prolog flags. This is done in two phases:
* early on, it takes care of the atomic flags that are required by other modules;
* later, it looks at flags that are structured terms
*
* @param bootstrap: wether this is done before stack initialization, or afterwards.
* Complex terms can only be built in the second step.
*/
void
Yap_InitFlags( bool bootstrap) {
CACHE_REGS
tr_fr_ptr tr0 = TR;
flag_info *f =
global_flags_setup;
GLOBAL_flagCount = 0;
if (bootstrap) {
GLOBAL_Flags = (union flagTerm *)Yap_AllocCodeSpace(sizeof(union flagTerm)*(2*sizeof(global_flags_setup)/sizeof(flag_info)));
}
while (f->name != NULL) {
bool itf = setInitialValue( bootstrap, f->def, f->init, GLOBAL_Flags+GLOBAL_flagCount );
if (itf) {
initFlag( f, GLOBAL_flagCount, true);
}
GLOBAL_flagCount ++;
f++;
}
LOCAL_flagCount = 0;
int nflags = sizeof(local_flags_setup)/sizeof(flag_info);
if (bootstrap)
LOCAL_Flags = (union flagTerm *)Yap_AllocCodeSpace(sizeof(union flagTerm)*nflags);
f =
local_flags_setup;
while (f->name != NULL) {
bool itf = setInitialValue( bootstrap, f->def, f->init, LOCAL_Flags+LOCAL_flagCount );
// Term itf = Yap_StringToTerm(f->init, strlen(f->init)+1, LOCAL_encoding, 1200, &tp);
if (itf) {
initFlag( f, LOCAL_flagCount, false);
}
LOCAL_flagCount ++;
f++;
}
if (!bootstrap) {
Yap_InitCPredBack("current_prolog_flag", 2, 1, current_prolog_flag, cont_yap_flag, 0);
TR = tr0;
/** @pred prolog_flag(? _Flag_,- _Value__)
Obtain the value for a YAP Prolog flag, same as current_prolog_flag/2_.
*/
Yap_InitCPredBack("prolog_flag", 3, 1, prolog_flag, cont_yap_flag, 0);
Yap_InitCPredBack("prolog_flag", 2, 1, prolog_flag, cont_yap_flag, 0);
Yap_InitCPred("set_prolog_flag", 2, set_prolog_flag, SyncPredFlag);
Yap_InitCPred("$create_prolog_flag", 3, do_create_prolog_flag, SyncPredFlag);
Yap_InitCPredBack("yap_flag", 2, 1, yap_flag,cont_yap_flag, 0);
Yap_InitCPredBack("prolog_flag_property", 2, 1, prolog_flag_property,cont_prolog_flag_property, 0);
Yap_InitCPred("source", 0, source,SyncPredFlag);
Yap_InitCPred("no_source", 0, no_source,SyncPredFlag);
Yap_InitCPred("source_mode", 2, source_mode, SyncPredFlag);
}
}
/* Accessing and changing the flags for a predicate */