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thechaingamer
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ada-git-code

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K : Integer;
procedure Init is
begin
B := 0;
K := 0;
end Init;
procedure Need( n : Natural ) is
pragma Inline(Need);
bt: U8;
begin
while K < n loop
Read_raw_byte( bt );
B:= B or Shift_Left( Unsigned_32( bt ), 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
begin
return Integer(Read_U32(n));
end Read;
function Read_and_dump( n: Natural ) return Integer is
res: Integer;
begin
res:= Read(n);
Dump(n);
return res;
end Read_and_dump;
function Read_and_dump_U32( n: Natural ) return Unsigned_32 is
res: Unsigned_32;
begin
res:= Read_U32(n);
Dump(n);
return res;
end Read_and_dump_U32;
end Bit_buffer;
old_bytes: Natural:= 0;
-- how many bytes to be resent from last Inflate output
byte_mem: Byte_array(1..8);
procedure Flush ( x: Natural ) is
begin
if full_trace then
Ada.Text_IO.Put("[Flush..." & Integer'Image(x));
end if;
CRC32.Update( UnZ_Glob.crc32val, UnZ_Glob.slide( 0..x-1 ) );
if old_bytes > 0 then
declare
app: constant Byte_array:=
byte_mem(1..old_bytes) & UnZ_Glob.slide(0..x-1);
begin
Output_uncompressed(app, old_bytes);
-- In extreme cases (x very small), we might have some of
-- the rejected bytes from byte_mem.
if old_bytes > 0 then
byte_mem(1..old_bytes):= app(app'Last-(old_bytes-1)..app'Last);
end if;
Function Definition: procedure Inflate_stored_block is -- Actually, nothing to inflate
Function Body: N : Integer;
begin
if full_trace then
Ada.Text_IO.Put_Line("Begin Inflate_stored_block");
end if;
UnZ_IO.Bit_buffer.Dump_to_byte_boundary;
-- Get the block length and its complement
N:= UnZ_IO.Bit_buffer.Read_and_dump( 16 );
if N /= Integer(
(not UnZ_IO.Bit_buffer.Read_and_dump_U32(16))
and 16#ffff#)
then
raise error_in_image_data;
end if;
while N > 0 and then not UnZ_Glob.Zip_EOF loop
-- Read and output the non-compressed data
N:= N - 1;