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ada-git-code

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pragma Inline (Dump);
procedure Dump_To_Byte_Boundary;
function Read_And_Dump (N : Natural) return Integer;
pragma Inline (Read_And_Dump);
function Read_And_Dump_U32 (N : Natural) return Unsigned_32;
pragma Inline (Read_And_Dump_U32);
end Bit_Buffer;
procedure Flush (X : Natural); -- directly from slide to output stream
procedure Flush_If_Full (W : in out Integer);
pragma Inline (Flush_If_Full);
procedure Copy (Distance, Length : Natural; Index : in out Natural);
pragma Inline (Copy);
end Unz_Io;
package Unz_Meth is
procedure Copy_Stored (Size : Ada.Streams.Stream_Element_Offset);
procedure Inflate;
end Unz_Meth;
------------------------------
-- Bodies of UnZ_* packages --
------------------------------
package body Unz_Io is
procedure Init_Buffers is
begin
Unz_Glob.Inpos := 0; -- Input buffer position
Unz_Glob.Readpos := -1; -- Nothing read
Unz_Glob.Slide_Index := 0;
Unz_Glob.Reachedsize := 0;
Zip_Eof := False;
Zip.CRC.Init (CRC_Value);
Bit_Buffer.Init;
end Init_Buffers;
procedure Process_Compressed_End_Reached is
begin
if Zip_Eof then -- We came already here once
raise Zip.Archive_Corrupted with
"Decoding went past compressed data size plus one buffer length";
-- Avoid infinite loop on data with exactly buffer's length and no end marker
else
Unz_Glob.Readpos := Unz_Glob.Inbuf'Length;
-- Simulates reading -> no blocking.
-- The buffer is full of "random" data and we hope for a wrong code or a CRC error
Zip_Eof := True;
end if;
end Process_Compressed_End_Reached;
procedure Read_Buffer is
begin
if Unz_Glob.Reachedsize > Compressed_Size + 2 then
-- +2: last code is smaller than requested!
Process_Compressed_End_Reached;
else
begin
Zip.Blockread
(Stream => Zip_File,
Buffer => Unz_Glob.Inbuf,
Actually_Read => Unz_Glob.Readpos);
exception
when others => -- I/O error
Process_Compressed_End_Reached;
Function Definition: procedure Init is
Function Body: begin
B := 0;
K := 0;
end Init;
procedure Need (N : Natural) is
pragma Inline (Need);
begin
while K < N loop
B := B or Shift_Left (Unsigned_32 (Read_Byte_Decrypted), K);
K := K + 8;
end loop;
end Need;
procedure Dump (N : Natural) is
begin
B := Shift_Right (B, N);
K := K - N;
end Dump;
procedure Dump_To_Byte_Boundary is
begin
Dump (K mod 8);
end Dump_To_Byte_Boundary;
function Read_U32 (N : Natural) return Unsigned_32 is
begin
Need (N);
return B and (Shift_Left (1, N) - 1);
end Read_U32;
function Read (N : Natural) return Integer is