static FrList *read_List(istream &input, const char *)
{
FrList *list, *prev ;
FrObject *curr ;
list = prev = 0 ;
input.get() ; // discard the initial left parenthesis
FramepaC_read_nesting_level++ ;
while (FrSkipWhitespace(input) != ')' && !input.eof() && !input.fail())
{
FrObject *obj = read_FrObject(input) ;
if (obj == symbolPERIOD && FrSkipWhitespace(input) != ')')
{
// period is not last item, so check if it's a dotted pair
curr = read_FrObject(input) ;
// was period second-to-last in list?
if (FrSkipWhitespace(input) == ')')
{
if (!list)
prev = list = new FrList(0) ;
prev->replacd(curr) ;
break ;
}
else
{
if (!list)
prev = list = new FrList(obj) ;
else
{
obj = new FrList(obj) ;
prev->replacd(obj) ;
prev = (FrList*)obj ;
}
obj = curr ;
}
}
curr = new FrList(obj) ;
if (!list)
list = (FrList*)curr ;
else
prev->replacd(curr) ;
prev = (FrList*)curr ;
}
if (input.get() != ')')
expected_right_paren(list) ;
if (--FramepaC_read_nesting_level <= 0 && FramepaC_read_associations)
{
FramepaC_read_associations->freeObject() ;
FramepaC_read_associations = 0 ;
}
return list ;
}
static FrObject *read_Queue(istream &input, const char *)
{
FrObject *result = read_FrObject(input) ;
if (result && result->consp())
return new FrQueue((FrList*)result) ;
else
return new FrQueue(0) ;
}
static void read_Facet(istream &input,FrFrame *frame,FrSymbol *slot)
{
input.get() ; // consume the left bracket
FrSymbol *facet ;
facet = read_Symbol(input) ; // get facet name
if (!facet || !facet->symbolp()) // the name must be a symbol
{
FrWarning(errmsg_facet_symbol) ;
free_object(facet) ;
return ;
}
frame->createFacet(slot,facet) ;
char ch ;
while ((ch = FrSkipWhitespace(input)) != 0 && ch != ']')
{
frame->addFillerNoCopy(slot,facet,read_FrObject(input)) ;
}
if (input.get() != ']')
FrWarning(errmsg_facet_malformed) ;
}