| 1 | ---------------------------------------------------------------- |
| 2 | -- ZLib for Ada thick binding. -- |
| 3 | -- -- |
| 4 | -- Copyright (C) 2002-2003 Dmitriy Anisimkov -- |
| 5 | -- -- |
| 6 | -- Open source license information is in the zlib.ads file. -- |
| 7 | ---------------------------------------------------------------- |
| 8 | |
| 9 | -- $Id: test.adb,v 1.17 2003/08/12 12:13:30 vagul Exp $ |
| 10 | |
| 11 | -- The program has a few aims. |
| 12 | -- 1. Test ZLib.Ada95 thick binding functionality. |
| 13 | -- 2. Show the example of use main functionality of the ZLib.Ada95 binding. |
| 14 | -- 3. Build this program automatically compile all ZLib.Ada95 packages under |
| 15 | -- GNAT Ada95 compiler. |
| 16 | |
| 17 | with ZLib.Streams; |
| 18 | with Ada.Streams.Stream_IO; |
| 19 | with Ada.Numerics.Discrete_Random; |
| 20 | |
| 21 | with Ada.Text_IO; |
| 22 | |
| 23 | with Ada.Calendar; |
| 24 | |
| 25 | procedure Test is |
| 26 | |
| 27 | use Ada.Streams; |
| 28 | use Stream_IO; |
| 29 | |
| 30 | ------------------------------------ |
| 31 | -- Test configuration parameters -- |
| 32 | ------------------------------------ |
| 33 | |
| 34 | File_Size : Count := 100_000; |
| 35 | Continuous : constant Boolean := False; |
| 36 | |
| 37 | Header : constant ZLib.Header_Type := ZLib.Default; |
| 38 | -- ZLib.None; |
| 39 | -- ZLib.Auto; |
| 40 | -- ZLib.GZip; |
| 41 | -- Do not use Header other then Default in ZLib versions 1.1.4 |
| 42 | -- and older. |
| 43 | |
| 44 | Strategy : constant ZLib.Strategy_Type := ZLib.Default_Strategy; |
| 45 | Init_Random : constant := 10; |
| 46 | |
| 47 | -- End -- |
| 48 | |
| 49 | In_File_Name : constant String := "testzlib.in"; |
| 50 | -- Name of the input file |
| 51 | |
| 52 | Z_File_Name : constant String := "testzlib.zlb"; |
| 53 | -- Name of the compressed file. |
| 54 | |
| 55 | Out_File_Name : constant String := "testzlib.out"; |
| 56 | -- Name of the decompressed file. |
| 57 | |
| 58 | File_In : File_Type; |
| 59 | File_Out : File_Type; |
| 60 | File_Back : File_Type; |
| 61 | File_Z : ZLib.Streams.Stream_Type; |
| 62 | |
| 63 | Filter : ZLib.Filter_Type; |
| 64 | |
| 65 | Time_Stamp : Ada.Calendar.Time; |
| 66 | |
| 67 | procedure Generate_File; |
| 68 | -- Generate file of spetsified size with some random data. |
| 69 | -- The random data is repeatable, for the good compression. |
| 70 | |
| 71 | procedure Compare_Streams |
| 72 | (Left, Right : in out Root_Stream_Type'Class); |
| 73 | -- The procedure compearing data in 2 streams. |
| 74 | -- It is for compare data before and after compression/decompression. |
| 75 | |
| 76 | procedure Compare_Files (Left, Right : String); |
| 77 | -- Compare files. Based on the Compare_Streams. |
| 78 | |
| 79 | procedure Copy_Streams |
| 80 | (Source, Target : in out Root_Stream_Type'Class; |
| 81 | Buffer_Size : in Stream_Element_Offset := 1024); |
| 82 | -- Copying data from one stream to another. It is for test stream |
| 83 | -- interface of the library. |
| 84 | |
| 85 | procedure Data_In |
| 86 | (Item : out Stream_Element_Array; |
| 87 | Last : out Stream_Element_Offset); |
| 88 | -- this procedure is for generic instantiation of |
| 89 | -- ZLib.Generic_Translate. |
| 90 | -- reading data from the File_In. |
| 91 | |
| 92 | procedure Data_Out (Item : in Stream_Element_Array); |
| 93 | -- this procedure is for generic instantiation of |
| 94 | -- ZLib.Generic_Translate. |
| 95 | -- writing data to the File_Out. |
| 96 | |
| 97 | procedure Stamp; |
| 98 | -- Store the timestamp to the local variable. |
| 99 | |
| 100 | procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count); |
| 101 | -- Print the time statistic with the message. |
| 102 | |
| 103 | procedure Translate is new ZLib.Generic_Translate |
| 104 | (Data_In => Data_In, |
| 105 | Data_Out => Data_Out); |
| 106 | -- This procedure is moving data from File_In to File_Out |
| 107 | -- with compression or decompression, depend on initialization of |
| 108 | -- Filter parameter. |
| 109 | |
| 110 | ------------------- |
| 111 | -- Compare_Files -- |
| 112 | ------------------- |
| 113 | |
| 114 | procedure Compare_Files (Left, Right : String) is |
| 115 | Left_File, Right_File : File_Type; |
| 116 | begin |
| 117 | Open (Left_File, In_File, Left); |
| 118 | Open (Right_File, In_File, Right); |
| 119 | Compare_Streams (Stream (Left_File).all, Stream (Right_File).all); |
| 120 | Close (Left_File); |
| 121 | Close (Right_File); |
| 122 | end Compare_Files; |
| 123 | |
| 124 | --------------------- |
| 125 | -- Compare_Streams -- |
| 126 | --------------------- |
| 127 | |
| 128 | procedure Compare_Streams |
| 129 | (Left, Right : in out Ada.Streams.Root_Stream_Type'Class) |
| 130 | is |
| 131 | Left_Buffer, Right_Buffer : Stream_Element_Array (0 .. 16#FFF#); |
| 132 | Left_Last, Right_Last : Stream_Element_Offset; |
| 133 | begin |
| 134 | loop |
| 135 | Read (Left, Left_Buffer, Left_Last); |
| 136 | Read (Right, Right_Buffer, Right_Last); |
| 137 | |
| 138 | if Left_Last /= Right_Last then |
| 139 | Ada.Text_IO.Put_Line ("Compare error :" |
| 140 | & Stream_Element_Offset'Image (Left_Last) |
| 141 | & " /= " |
| 142 | & Stream_Element_Offset'Image (Right_Last)); |
| 143 | |
| 144 | raise Constraint_Error; |
| 145 | |
| 146 | elsif Left_Buffer (0 .. Left_Last) |
| 147 | /= Right_Buffer (0 .. Right_Last) |
| 148 | then |
| 149 | Ada.Text_IO.Put_Line ("ERROR: IN and OUT files is not equal."); |
| 150 | raise Constraint_Error; |
| 151 | |
| 152 | end if; |
| 153 | |
| 154 | exit when Left_Last < Left_Buffer'Last; |
| 155 | end loop; |
| 156 | end Compare_Streams; |
| 157 | |
| 158 | ------------------ |
| 159 | -- Copy_Streams -- |
| 160 | ------------------ |
| 161 | |
| 162 | procedure Copy_Streams |
| 163 | (Source, Target : in out Ada.Streams.Root_Stream_Type'Class; |
| 164 | Buffer_Size : in Stream_Element_Offset := 1024) |
| 165 | is |
| 166 | Buffer : Stream_Element_Array (1 .. Buffer_Size); |
| 167 | Last : Stream_Element_Offset; |
| 168 | begin |
| 169 | loop |
| 170 | Read (Source, Buffer, Last); |
| 171 | Write (Target, Buffer (1 .. Last)); |
| 172 | |
| 173 | exit when Last < Buffer'Last; |
| 174 | end loop; |
| 175 | end Copy_Streams; |
| 176 | |
| 177 | ------------- |
| 178 | -- Data_In -- |
| 179 | ------------- |
| 180 | |
| 181 | procedure Data_In |
| 182 | (Item : out Stream_Element_Array; |
| 183 | Last : out Stream_Element_Offset) is |
| 184 | begin |
| 185 | Read (File_In, Item, Last); |
| 186 | end Data_In; |
| 187 | |
| 188 | -------------- |
| 189 | -- Data_Out -- |
| 190 | -------------- |
| 191 | |
| 192 | procedure Data_Out (Item : in Stream_Element_Array) is |
| 193 | begin |
| 194 | Write (File_Out, Item); |
| 195 | end Data_Out; |
| 196 | |
| 197 | ------------------- |
| 198 | -- Generate_File -- |
| 199 | ------------------- |
| 200 | |
| 201 | procedure Generate_File is |
| 202 | subtype Visible_Symbols is Stream_Element range 16#20# .. 16#7E#; |
| 203 | |
| 204 | package Random_Elements is |
| 205 | new Ada.Numerics.Discrete_Random (Visible_Symbols); |
| 206 | |
| 207 | Gen : Random_Elements.Generator; |
| 208 | Buffer : Stream_Element_Array := (1 .. 77 => 16#20#) & 10; |
| 209 | |
| 210 | Buffer_Count : constant Count := File_Size / Buffer'Length; |
| 211 | -- Number of same buffers in the packet. |
| 212 | |
| 213 | Density : constant Count := 30; -- from 0 to Buffer'Length - 2; |
| 214 | |
| 215 | procedure Fill_Buffer (J, D : in Count); |
| 216 | -- Change the part of the buffer. |
| 217 | |
| 218 | ----------------- |
| 219 | -- Fill_Buffer -- |
| 220 | ----------------- |
| 221 | |
| 222 | procedure Fill_Buffer (J, D : in Count) is |
| 223 | begin |
| 224 | for K in 0 .. D loop |
| 225 | Buffer |
| 226 | (Stream_Element_Offset ((J + K) mod (Buffer'Length - 1) + 1)) |
| 227 | := Random_Elements.Random (Gen); |
| 228 | |
| 229 | end loop; |
| 230 | end Fill_Buffer; |
| 231 | |
| 232 | begin |
| 233 | Random_Elements.Reset (Gen, Init_Random); |
| 234 | |
| 235 | Create (File_In, Out_File, In_File_Name); |
| 236 | |
| 237 | Fill_Buffer (1, Buffer'Length - 2); |
| 238 | |
| 239 | for J in 1 .. Buffer_Count loop |
| 240 | Write (File_In, Buffer); |
| 241 | |
| 242 | Fill_Buffer (J, Density); |
| 243 | end loop; |
| 244 | |
| 245 | -- fill remain size. |
| 246 | |
| 247 | Write |
| 248 | (File_In, |
| 249 | Buffer |
| 250 | (1 .. Stream_Element_Offset |
| 251 | (File_Size - Buffer'Length * Buffer_Count))); |
| 252 | |
| 253 | Flush (File_In); |
| 254 | Close (File_In); |
| 255 | end Generate_File; |
| 256 | |
| 257 | --------------------- |
| 258 | -- Print_Statistic -- |
| 259 | --------------------- |
| 260 | |
| 261 | procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count) is |
| 262 | use Ada.Calendar; |
| 263 | use Ada.Text_IO; |
| 264 | |
| 265 | package Count_IO is new Integer_IO (ZLib.Count); |
| 266 | |
| 267 | Curr_Dur : Duration := Clock - Time_Stamp; |
| 268 | begin |
| 269 | Put (Msg); |
| 270 | |
| 271 | Set_Col (20); |
| 272 | Ada.Text_IO.Put ("size ="); |
| 273 | |
| 274 | Count_IO.Put |
| 275 | (Data_Size, |
| 276 | Width => Stream_IO.Count'Image (File_Size)'Length); |
| 277 | |
| 278 | Put_Line (" duration =" & Duration'Image (Curr_Dur)); |
| 279 | end Print_Statistic; |
| 280 | |
| 281 | ----------- |
| 282 | -- Stamp -- |
| 283 | ----------- |
| 284 | |
| 285 | procedure Stamp is |
| 286 | begin |
| 287 | Time_Stamp := Ada.Calendar.Clock; |
| 288 | end Stamp; |
| 289 | |
| 290 | begin |
| 291 | Ada.Text_IO.Put_Line ("ZLib " & ZLib.Version); |
| 292 | |
| 293 | loop |
| 294 | Generate_File; |
| 295 | |
| 296 | for Level in ZLib.Compression_Level'Range loop |
| 297 | |
| 298 | Ada.Text_IO.Put_Line ("Level =" |
| 299 | & ZLib.Compression_Level'Image (Level)); |
| 300 | |
| 301 | -- Test generic interface. |
| 302 | Open (File_In, In_File, In_File_Name); |
| 303 | Create (File_Out, Out_File, Z_File_Name); |
| 304 | |
| 305 | Stamp; |
| 306 | |
| 307 | -- Deflate using generic instantiation. |
| 308 | |
| 309 | ZLib.Deflate_Init |
| 310 | (Filter => Filter, |
| 311 | Level => Level, |
| 312 | Strategy => Strategy, |
| 313 | Header => Header); |
| 314 | |
| 315 | Translate (Filter); |
| 316 | Print_Statistic ("Generic compress", ZLib.Total_Out (Filter)); |
| 317 | ZLib.Close (Filter); |
| 318 | |
| 319 | Close (File_In); |
| 320 | Close (File_Out); |
| 321 | |
| 322 | Open (File_In, In_File, Z_File_Name); |
| 323 | Create (File_Out, Out_File, Out_File_Name); |
| 324 | |
| 325 | Stamp; |
| 326 | |
| 327 | -- Inflate using generic instantiation. |
| 328 | |
| 329 | ZLib.Inflate_Init (Filter, Header => Header); |
| 330 | |
| 331 | Translate (Filter); |
| 332 | Print_Statistic ("Generic decompress", ZLib.Total_Out (Filter)); |
| 333 | |
| 334 | ZLib.Close (Filter); |
| 335 | |
| 336 | Close (File_In); |
| 337 | Close (File_Out); |
| 338 | |
| 339 | Compare_Files (In_File_Name, Out_File_Name); |
| 340 | |
| 341 | -- Test stream interface. |
| 342 | |
| 343 | -- Compress to the back stream. |
| 344 | |
| 345 | Open (File_In, In_File, In_File_Name); |
| 346 | Create (File_Back, Out_File, Z_File_Name); |
| 347 | |
| 348 | Stamp; |
| 349 | |
| 350 | ZLib.Streams.Create |
| 351 | (Stream => File_Z, |
| 352 | Mode => ZLib.Streams.Out_Stream, |
| 353 | Back => ZLib.Streams.Stream_Access |
| 354 | (Stream (File_Back)), |
| 355 | Back_Compressed => True, |
| 356 | Level => Level, |
| 357 | Strategy => Strategy, |
| 358 | Header => Header); |
| 359 | |
| 360 | Copy_Streams |
| 361 | (Source => Stream (File_In).all, |
| 362 | Target => File_Z); |
| 363 | |
| 364 | -- Flushing internal buffers to the back stream. |
| 365 | |
| 366 | ZLib.Streams.Flush (File_Z, ZLib.Finish); |
| 367 | |
| 368 | Print_Statistic ("Write compress", |
| 369 | ZLib.Streams.Write_Total_Out (File_Z)); |
| 370 | |
| 371 | ZLib.Streams.Close (File_Z); |
| 372 | |
| 373 | Close (File_In); |
| 374 | Close (File_Back); |
| 375 | |
| 376 | -- Compare reading from original file and from |
| 377 | -- decompression stream. |
| 378 | |
| 379 | Open (File_In, In_File, In_File_Name); |
| 380 | Open (File_Back, In_File, Z_File_Name); |
| 381 | |
| 382 | ZLib.Streams.Create |
| 383 | (Stream => File_Z, |
| 384 | Mode => ZLib.Streams.In_Stream, |
| 385 | Back => ZLib.Streams.Stream_Access |
| 386 | (Stream (File_Back)), |
| 387 | Back_Compressed => True, |
| 388 | Header => Header); |
| 389 | |
| 390 | Stamp; |
| 391 | Compare_Streams (Stream (File_In).all, File_Z); |
| 392 | |
| 393 | Print_Statistic ("Read decompress", |
| 394 | ZLib.Streams.Read_Total_Out (File_Z)); |
| 395 | |
| 396 | ZLib.Streams.Close (File_Z); |
| 397 | Close (File_In); |
| 398 | Close (File_Back); |
| 399 | |
| 400 | -- Compress by reading from compression stream. |
| 401 | |
| 402 | Open (File_Back, In_File, In_File_Name); |
| 403 | Create (File_Out, Out_File, Z_File_Name); |
| 404 | |
| 405 | ZLib.Streams.Create |
| 406 | (Stream => File_Z, |
| 407 | Mode => ZLib.Streams.In_Stream, |
| 408 | Back => ZLib.Streams.Stream_Access |
| 409 | (Stream (File_Back)), |
| 410 | Back_Compressed => False, |
| 411 | Level => Level, |
| 412 | Strategy => Strategy, |
| 413 | Header => Header); |
| 414 | |
| 415 | Stamp; |
| 416 | Copy_Streams |
| 417 | (Source => File_Z, |
| 418 | Target => Stream (File_Out).all); |
| 419 | |
| 420 | Print_Statistic ("Read compress", |
| 421 | ZLib.Streams.Read_Total_Out (File_Z)); |
| 422 | |
| 423 | ZLib.Streams.Close (File_Z); |
| 424 | |
| 425 | Close (File_Out); |
| 426 | Close (File_Back); |
| 427 | |
| 428 | -- Decompress to decompression stream. |
| 429 | |
| 430 | Open (File_In, In_File, Z_File_Name); |
| 431 | Create (File_Back, Out_File, Out_File_Name); |
| 432 | |
| 433 | ZLib.Streams.Create |
| 434 | (Stream => File_Z, |
| 435 | Mode => ZLib.Streams.Out_Stream, |
| 436 | Back => ZLib.Streams.Stream_Access |
| 437 | (Stream (File_Back)), |
| 438 | Back_Compressed => False, |
| 439 | Header => Header); |
| 440 | |
| 441 | Stamp; |
| 442 | |
| 443 | Copy_Streams |
| 444 | (Source => Stream (File_In).all, |
| 445 | Target => File_Z); |
| 446 | |
| 447 | Print_Statistic ("Write decompress", |
| 448 | ZLib.Streams.Write_Total_Out (File_Z)); |
| 449 | |
| 450 | ZLib.Streams.Close (File_Z); |
| 451 | Close (File_In); |
| 452 | Close (File_Back); |
| 453 | |
| 454 | Compare_Files (In_File_Name, Out_File_Name); |
| 455 | end loop; |
| 456 | |
| 457 | Ada.Text_IO.Put_Line (Count'Image (File_Size) & " Ok."); |
| 458 | |
| 459 | exit when not Continuous; |
| 460 | |
| 461 | File_Size := File_Size + 1; |
| 462 | end loop; |
| 463 | end Test; |