diogo/yap-6.3
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avoid recursive calls while parsing lists.

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@655 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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vsc 2002-10-28 17:46:55 +00:00
parent 8c71464b80
commit ad552d04b4
1 changed files with 23 additions and 14 deletions
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37
C/parser.c
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@ -316,31 +316,40 @@ ParseArgs(Atom a)
static Term
ParseList(void)
{
Term t, s;
t = ParseTerm(999);
Term t, s, o;
CELL *to_store;
o = AbsPair(H);
loop:
to_store = H;
H+=2;
to_store[0] = ParseTerm(999);
if (tokptr->Tok == Ord(Ponctuation_tok)) {
if (((int) tokptr->TokInfo) == ',') {
NextToken;
if (tokptr->Tok == Ord(Name_tok)
&& strcmp(RepAtom((Atom)(tokptr->TokInfo))->StrOfAE, "..") == 0) {
NextToken;
s = ParseTerm(999);
} else
s = ParseList();
to_store[1] = ParseTerm(999);
} else {
/* check for possible overflow against local stack */
if (H > ASP-4096) {
to_store[1] = TermNil;
ErrorMessage = "Stack Overflow";
FAIL;
} else {
to_store[1] = AbsPair(H);
goto loop;
}
}
} else if (((int) tokptr->TokInfo) == '|') {
NextToken;
s = ParseTerm(999);
} else
s = MkAtomTerm(AtomNil);
t = MkPairTerm(t, s);
/* check for possible overflow against local stack */
if (H > ASP-4096) {
ErrorMessage = "Stack Overflow";
FAIL;
to_store[1] = ParseTerm(999);
} else {
to_store[1] = MkAtomTerm(AtomNil);
}
} else
FAIL;
return (t);
return (o);
}
#ifndef INFINITY