private static void GlueFreeBlocks(CPpmd7 p)
{
CPpmd7_Node_Ref head = new CPpmd7_Node_Ref(p.AlignOffset + p.Size);
CPpmd7_Node_Ref n = head;
uint i;
p.GlueCount = 255;
/* create doubly-linked list of free blocks */
for (i = 0; i < PPMD_NUM_INDEXES; i++)
{
ushort nu = I2U(p, i);
CPpmd7_Node_Ref next = (CPpmd7_Node_Ref)p.FreeList[i];
p.FreeList[i] = default(CPpmd_Void_Ref);
while (next.Value != 0)
{
CPpmd7_Node *node = NODE(p, next);
node->Next = n;
n = NODE(p, n)->Prev = next;
next = *(CPpmd7_Node_Ref *)node;
node->Stamp = 0;
node->NU = (ushort)nu;
}
}
NODE(p, head)->Stamp = 1;
NODE(p, head)->Next = n;
NODE(p, n)->Prev = head;
if (p.LoUnit != p.HiUnit)
{
((CPpmd7_Node *)p.LoUnit)->Stamp = 1;
}
/* Glue free blocks */
while (n != head)
{
CPpmd7_Node *node = NODE(p, n);
uint nu = (uint)node->NU;
for (;;)
{
CPpmd7_Node *node2 = NODE(p, n) + nu;
nu += node2->NU;
if (node2->Stamp != 0 || nu >= 0x10000)
{
break;
}
NODE(p, node2->Prev)->Next = node2->Next;
NODE(p, node2->Next)->Prev = node2->Prev;
node->NU = (ushort)nu;
}
n = node->Next;
}
/* Fill lists of free blocks */
for (n = NODE(p, head)->Next; n != head;)
{
CPpmd7_Node * node = NODE(p, n);
uint nu;
CPpmd7_Node_Ref next = node->Next;
for (nu = node->NU; nu > 128; nu -= 128, node += 128)
{
InsertNode(p, node, PPMD_NUM_INDEXES - 1);
}
if (I2U(p, i = U2I(p, nu)) != nu)
{
uint k = I2U(p, --i);
InsertNode(p, node + k, nu - k - 1);
}
InsertNode(p, node, i);
n = next;
}
}
private static CPpmd7_Node *NODE(CPpmd7 p, CPpmd7_Node_Ref offs) => (CPpmd7_Node *)(p.Base + offs.Value);