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fix bad handliong of position overflow.

This commit is contained in:
Vitor Santos Costa 2010-08-02 13:03:48 +01:00
parent e02ca2f520
commit 212758d25e
1 changed files with 8 additions and 6 deletions
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14
C/iopreds.c
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@ -4101,6 +4101,11 @@ static Int
return FALSE;
}
Yap_Error_TYPE = YAP_NO_ERROR;
tpos = StreamPosition(inp_stream);
if (!Yap_unify(tpos,ARG5)) {
/* do this early so that we do not have to protect it in case of stack expansion */
return FALSE;
}
while (TRUE) {
CELL *old_H;
UInt cpos = 0;
@ -4195,8 +4200,7 @@ static Int
} else {
Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable);
return Yap_unify(tpos,ARG5) &&
Yap_unify_constant(ARG2, MkAtomTerm (AtomEof))
return Yap_unify_constant(ARG2, MkAtomTerm (AtomEof))
&& Yap_unify_constant(ARG4, TermNil);
}
}
@ -4258,8 +4262,7 @@ static Int
t[0] = terr;
t[1] = MkAtomTerm(Yap_LookupAtom(Yap_ErrorMessage));
Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable);
return(Yap_unify(tpos,ARG5) &&
Yap_unify(ARG6,Yap_MkApplTerm(Yap_MkFunctor(AtomError,2),2,t)));
return Yap_unify(ARG6,Yap_MkApplTerm(Yap_MkFunctor(AtomError,2),2,t));
}
}
} else {
@ -4271,7 +4274,7 @@ static Int
#if EMACS
first_char = tokstart->TokPos;
#endif /* EMACS */
if (!Yap_unify(t, ARG2) || !Yap_unify(tpos,ARG5))
if (!Yap_unify(t, ARG2))
return FALSE;
if (AtomOfTerm (Deref (ARG1)) == AtomTrue) {
while (TRUE) {
@ -4291,7 +4294,6 @@ static Int
Yap_growstack_in_parser(&old_TR, &tokstart, &Yap_VarTable);
ScannerStack = (char *)TR;
TR = old_TR;
old_H = H;
}
}
Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable);