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C_Idx := K;
-- Try smaller tables up to z bits
loop
J := J + 1;
exit when J >= Z;
F := F * 2;
C_Idx := C_Idx + 1;
exit when F - Count (C_Idx) <= 0;
F := F - Count (C_Idx);
end loop;
end if;
if W + J > El and then W < El then
J := El - W; -- Make EOB code end at table
end if;
if W = 0 then
J := M; -- Fix: main table always m bits!
end if;
Z := Integer (Shift_Left (Unsigned_32'(1), J)); -- z:= 2 ** j;
Bits (Table_Level) := J;
-- Allocate and link new table
begin
Current_Table_Ptr := new Huft_Table (0 .. Z);
New_Node_Ptr := new Table_List'(Current_Table_Ptr, null);
exception
when Storage_Error =>
raise Huft_Out_Of_Memory;
Function Definition: procedure Dispose is new Ada.Unchecked_Deallocation (Dir_Node, P_Dir_Node);
Function Body: procedure Dispose is new Ada.Unchecked_Deallocation (String, P_String);
package Binary_Tree_Rebalancing is
procedure Rebalance (Root : in out P_Dir_Node);
end Binary_Tree_Rebalancing;
package body Binary_Tree_Rebalancing is
-------------------------------------------------------------------
-- Tree Rebalancing in Optimal Time and Space --
-- QUENTIN F. STOUT and BETTE L. WARREN --
-- Communications of the ACM September 1986 Volume 29 Number 9 --
-------------------------------------------------------------------
-- http://www.eecs.umich.edu/~qstout/pap/CACM86.pdf
--
-- Translated by (New) P2Ada v. 15-Nov-2006
procedure Tree_To_Vine (Root : P_Dir_Node; Size : out Integer) is
-- Transform the tree with pseudo-root "root^" into a vine with
-- pseudo-root node "root^", and store the number of nodes in "size"
Vine_Tail, Remainder, Temp : P_Dir_Node;
begin
Vine_Tail := Root;
Remainder := Vine_Tail.Right;
Size := 0;
while Remainder /= null loop
if Remainder.Left = null then
-- Move vine-tail down one:
Vine_Tail := Remainder;
Remainder := Remainder.Right;
Size := Size + 1;
else
-- Rotate:
Temp := Remainder.Left;
Remainder.Left := Temp.Right;
Temp.Right := Remainder;
Remainder := Temp;
Vine_Tail.Right := Temp;
end if;
end loop;
end Tree_To_Vine;
procedure Vine_To_Tree (Root : P_Dir_Node; Size_Given : Integer) is
-- Convert the vine with "size" nodes and pseudo-root
-- node "root^" into a balanced tree
Leaf_Count : Integer;
Size : Integer := Size_Given;
procedure Compression (Root_Compress : P_Dir_Node; Count : Integer) is
-- Compress "count" spine nodes in the tree with pseudo-root "root_compress^"
Scanner, Child : P_Dir_Node;
begin
Scanner := Root_Compress;
for Counter in reverse 1 .. Count loop
Child := Scanner.Right;
Scanner.Right := Child.Right;
Scanner := Scanner.Right;
Child.Right := Scanner.Left;
Scanner.Left := Child;
end loop;
end Compression;
-- Returns n - 2 ** Integer( Float'Floor( log( Float(n) ) / log(2.0) ) )
-- without Float-Point calculation and rounding errors with too short floats
function Remove_Leading_Binary_1 (N : Integer) return Integer is
X : Integer := 2**16; -- supposed maximum
begin
if N < 1 then