static bool fill_from_los_stack( msgc_context_t *context )
{
int next, k, n, i;
word obj;
if (context->los_stack.stkp == context->los_stack.stkbot) {
/* underflow */
if (!pop_segment( &context->los_stack ))
return FALSE;
}
obj = *--context->los_stack.stkp;
next = (int)*--context->los_stack.stkp;
n = bytes2words( sizefield( *ptrof(obj) ) );
k = min( n-next, LARGE_OBJECT_LIMIT );
for ( i=0 ; i < k ; i++ )
PUSH( context, vector_ref( obj, i+next ) );
if (next+k < n)
LOS_PUSH( context, next+k, obj );
return TRUE;
}
static int push_constituents( msgc_context_t *context, word w )
{
int i, n;
switch (tagof(w)) {
case PAIR_TAG :
PUSH( context, pair_cdr( w ) ); /* Do the CDR last */
PUSH( context, pair_car( w ) ); /* Do the CAR first */
return 2;
case VEC_TAG :
case PROC_TAG :
n = bytes2words( sizefield(*ptrof(w)) );
if (n > LARGE_OBJECT_LIMIT)
LOS_PUSH( context, 0, w ); /* Treat large objects specially */
else
for ( i=0 ; i < n ; i++ )
PUSH( context, vector_ref( w, i ) );
return n+1;
default :
return 0;
}
}
static int push_constituents( msgc_context_t *context, word w )
{
int i, n;
switch (tagof(w)) {
case PAIR_TAG :
return push_pair_constiuents( context, w );
case VEC_TAG :
case PROC_TAG :
assert2_tag_hdr_consistency( context, w );
n = bytes2words( sizefield(*ptrof(w)) );
if (n > LARGE_OBJECT_LIMIT)
LOS_PUSH( context, 0, w ); /* Treat large objects specially */
else {
assert2_object_contents_mapped( context, w, n );
for ( i=0 ; i < n ; i++ ) {
PUSH( context, vector_ref( w, i ), w, i+1 );
}
}
return n+1;
default :
return 0;
}
}
