/usr/share/ada/adainclude/aws/zlib.ads is in libaws2.10.2-dev 2.10.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 | ------------------------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2010 Dmitriy Anisimkov --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation; either version 2 of the License, or (at --
-- your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, but --
-- WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
------------------------------------------------------------------------------
with Ada.Streams;
with Interfaces;
package ZLib is
ZLib_Error : exception;
Status_Error : exception;
type Compression_Level is new Integer range -1 .. 9;
type Flush_Mode is private;
type Compression_Method is private;
type Window_Bits_Type is new Integer range 8 .. 15;
type Memory_Level_Type is new Integer range 1 .. 9;
type Unsigned_32 is new Interfaces.Unsigned_32;
type Strategy_Type is private;
type Header_Type is (None, Auto, Default, GZip);
-- Header type usage have a some limitation for inflate.
-- See comment for Inflate_Init.
subtype Count is Long_Long_Integer range 0 .. Long_Long_Integer'Last;
Default_Memory_Level : constant Memory_Level_Type := 8;
Default_Window_Bits : constant Window_Bits_Type := 15;
----------------------------------
-- Compression method constants --
----------------------------------
Deflated : constant Compression_Method;
-- Only one method allowed in this ZLib version
---------------------------------
-- Compression level constants --
---------------------------------
No_Compression : constant Compression_Level := 0;
Best_Speed : constant Compression_Level := 1;
Best_Compression : constant Compression_Level := 9;
Default_Compression : constant Compression_Level := -1;
--------------------------
-- Flush mode constants --
--------------------------
No_Flush : constant Flush_Mode;
-- Regular way for compression, no flush
Partial_Flush : constant Flush_Mode;
-- Will be removed, use Z_SYNC_FLUSH instead
Sync_Flush : constant Flush_Mode;
-- All pending output is flushed to the output buffer and the output
-- is aligned on a byte boundary, so that the decompressor can get all
-- input data available so far. (In particular avail_in is zero after the
-- call if enough output space has been provided before the call.)
-- Flushing may degrade compression for some compression algorithms and so
-- it should be used only when necessary.
Block_Flush : constant Flush_Mode;
-- Z_BLOCK requests that inflate() stop
-- if and when it get to the next deflate block boundary. When decoding the
-- zlib or gzip format, this will cause inflate() to return immediately
-- after the header and before the first block. When doing a raw inflate,
-- inflate() will go ahead and process the first block, and will return
-- when it gets to the end of that block, or when it runs out of data.
Full_Flush : constant Flush_Mode;
-- All output is flushed as with SYNC_FLUSH, and the compression state
-- is reset so that decompression can restart from this point if previous
-- compressed data has been damaged or if random access is desired. Using
-- Full_Flush too often can seriously degrade the compression.
Finish : constant Flush_Mode;
-- Just for tell the compressor that input data is complete
------------------------------------
-- Compression strategy constants --
------------------------------------
-- RLE stategy could be used only in version 1.2.0 and later
Filtered : constant Strategy_Type;
Huffman_Only : constant Strategy_Type;
RLE : constant Strategy_Type;
Default_Strategy : constant Strategy_Type;
Default_Buffer_Size : constant := 4096;
type Filter_Type is tagged limited private;
-- The filter is for compression and for decompression.
-- The usage of the type is depend of its initialization.
function Version return String;
pragma Inline (Version);
-- Return string representation of the ZLib version
procedure Deflate_Init
(Filter : in out Filter_Type;
Level : in Compression_Level := Default_Compression;
Strategy : in Strategy_Type := Default_Strategy;
Method : in Compression_Method := Deflated;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Memory_Level : in Memory_Level_Type := Default_Memory_Level;
Header : in Header_Type := Default);
-- Compressor initialization.
-- When Header parameter is Auto or Default, then default zlib header
-- would be provided for compressed data.
-- When Header is GZip, then gzip header would be set instead of
-- default header.
-- When Header is None, no header would be set for compressed data.
procedure Inflate_Init
(Filter : in out Filter_Type;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Header : in Header_Type := Default);
-- Decompressor initialization.
-- Default header type mean that ZLib default header is expecting in the
-- input compressed stream.
-- Header type None mean that no header is expecting in the input stream.
-- GZip header type mean that GZip header is expecting in the
-- input compressed stream.
-- Auto header type mean that header type (GZip or Native) would be
-- detected automatically in the input stream.
-- Note that header types parameter values None, GZip and Auto are
-- supported for inflate routine only in ZLib versions 1.2.0.2 and later.
-- Deflate_Init is supporting all header types.
function Is_Open (Filter : in Filter_Type) return Boolean;
pragma Inline (Is_Open);
-- Is the filter opened for compression or decompression
procedure Close
(Filter : in out Filter_Type;
Ignore_Error : in Boolean := False);
-- Closing the compression or decompressor.
-- If stream is closing before the complete and Ignore_Error is False,
-- The exception would be raised.
generic
with procedure Data_In
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
with procedure Data_Out
(Item : in Ada.Streams.Stream_Element_Array);
procedure Generic_Translate
(Filter : in out Filter_Type;
In_Buffer_Size : in Integer := Default_Buffer_Size;
Out_Buffer_Size : in Integer := Default_Buffer_Size);
-- Compress/decompress data fetch from Data_In routine and pass the result
-- to the Data_Out routine. User should provide Data_In and Data_Out
-- for compression/decompression data flow.
-- Compression or decompression depend on Filter initialization.
function Total_In (Filter : in Filter_Type) return Count;
pragma Inline (Total_In);
-- Returns total number of input bytes read so far
function Total_Out (Filter : in Filter_Type) return Count;
pragma Inline (Total_Out);
-- Returns total number of bytes output so far
function CRC32
(CRC : in Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array)
return Unsigned_32;
pragma Inline (CRC32);
-- Compute CRC32, it could be necessary for make gzip format
procedure CRC32
(CRC : in out Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array);
pragma Inline (CRC32);
-- Compute CRC32, it could be necessary for make gzip format
-------------------------------------------------
-- Below is more complex low level routines. --
-------------------------------------------------
procedure Translate
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
-- Compress/decompress the In_Data buffer and place the result into
-- Out_Data. In_Last is the index of last element from In_Data accepted by
-- the Filter. Out_Last is the last element of the received data from
-- Filter. To tell the filter that incoming data are complete put the
-- Flush parameter to Finish.
function Stream_End (Filter : in Filter_Type) return Boolean;
pragma Inline (Stream_End);
-- Return the true when the stream is complete
procedure Flush
(Filter : in out Filter_Type;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
pragma Inline (Flush);
-- Flushing the data from the compressor
generic
with procedure Write
(Item : in Ada.Streams.Stream_Element_Array);
-- User should provide this routine for accept
-- compressed/decompressed data.
Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size;
-- Buffer size for Write user routine
procedure Write
(Filter : in out Filter_Type;
Item : in Ada.Streams.Stream_Element_Array;
Flush : in Flush_Mode := No_Flush);
-- Compress/Decompress data from Item to the generic parameter procedure
-- Write. Output buffer size could be set in Buffer_Size generic parameter.
generic
with procedure Read
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
-- User should provide data for compression/decompression
-- thru this routine.
Buffer : in out Ada.Streams.Stream_Element_Array;
-- Buffer for keep remaining data from the previous
-- back read.
Rest_First, Rest_Last : in out Ada.Streams.Stream_Element_Offset;
-- Rest_First have to be initialized to Buffer'Last + 1
-- Rest_Last have to be initialized to Buffer'Last
-- before usage.
Allow_Read_Some : in Boolean := False;
-- Is it allowed to return Last < Item'Last before end of data
procedure Read
(Filter : in out Filter_Type;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode := No_Flush);
-- Compress/Decompress data from generic parameter procedure Read to the
-- Item. User should provide Buffer and initialized Rest_First, Rest_Last
-- indicators. If Allow_Read_Some is True, Read routines could return
-- Last < Item'Last only at end of stream.
private
use Ada.Streams;
pragma Assert (Ada.Streams.Stream_Element'Size = 8);
pragma Assert (Ada.Streams.Stream_Element'Modulus = 2**8);
type Flush_Mode is new Integer range 0 .. 5;
type Compression_Method is new Integer range 8 .. 8;
type Strategy_Type is new Integer range 0 .. 3;
No_Flush : constant Flush_Mode := 0;
Partial_Flush : constant Flush_Mode := 1;
Sync_Flush : constant Flush_Mode := 2;
Full_Flush : constant Flush_Mode := 3;
Finish : constant Flush_Mode := 4;
Block_Flush : constant Flush_Mode := 5;
Filtered : constant Strategy_Type := 1;
Huffman_Only : constant Strategy_Type := 2;
RLE : constant Strategy_Type := 3;
Default_Strategy : constant Strategy_Type := 0;
Deflated : constant Compression_Method := 8;
type Z_Stream;
type Z_Stream_Access is access all Z_Stream;
type Filter_Type is tagged limited record
Strm : Z_Stream_Access;
Compression : Boolean;
Stream_End : Boolean;
Header : Header_Type;
CRC : Unsigned_32;
Offset : Stream_Element_Offset;
-- Offset for gzip header/footer output
end record;
end ZLib;
|