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------------------------------------------------------------------------------
-- Copyright (c) 2015-2016, Natacha Porté --
-- Copyright (c) 2015-2017, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
with Ada.Characters.Latin_1;
with Ada.Streams;
with Ada.Strings.Unbounded;
with Natools.S_Expressions;
with Natools.Smaz_256;
with Natools.Smaz_4096;
with Natools.Smaz_64;
with Natools.Smaz_Generic;
with Natools.Smaz_Implementations.Base_4096;
with Natools.Smaz_Original;
with Natools.Smaz_Test_Base_64_Hash;
package body Natools.Smaz_Tests is
generic
with package Smaz is new Natools.Smaz_Generic (<>);
with function Image (S : Ada.Streams.Stream_Element_Array) return String;
procedure Generic_Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz.Dictionary;
Decompressed : in String;
Compressed : in Ada.Streams.Stream_Element_Array);
function Decimal_Image (S : Ada.Streams.Stream_Element_Array) return String;
function Dictionary_4096 (Variable_Length_Verbatim : in Boolean)
return Natools.Smaz_4096.Dictionary;
function Dictionary_4096_Hash (S : in String) return Natural;
function Direct_Image (S : Ada.Streams.Stream_Element_Array) return String
renames Natools.S_Expressions.To_String;
function To_SEA (S : String) return Ada.Streams.Stream_Element_Array
renames Natools.S_Expressions.To_Atom;
procedure Test_Validity_4096
(Report : in out NT.Reporter'Class;
Dictionary : in Smaz_4096.Dictionary);
-----------------------
-- Test Dictionaries --
-----------------------
LF : constant Character := Ada.Characters.Latin_1.LF;
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for I in S'Range loop
Append (Result, Ada.Streams.Stream_Element'Image (S (I)));
end loop;
return To_String (Result);
end Decimal_Image;
function Dictionary_4096 (Variable_Length_Verbatim : in Boolean)
return Natools.Smaz_4096.Dictionary
is
subtype Letter_Rank is Natural range 1 .. 26;
function Lower (N : Letter_Rank) return Character
is (Character'Val (Character'Pos ('a') - 1 + N));
function Upper (N : Letter_Rank) return Character
is (Character'Val (Character'Pos ('A') - 1 + N));
subtype Digit_Rank is Natural range 0 .. 9;
function Image (N : Digit_Rank) return Character
is (Character'Val (Character'Pos ('0') + N));
Current_Index : Smaz_Implementations.Base_4096.Base_4096_Digit := 0;
Current_Offset : Positive := 1;
use type Smaz_Implementations.Base_4096.Base_4096_Digit;
procedure Push_Value
(Dict : in out Natools.Smaz_4096.Dictionary;
Value : in String);
procedure Push_Value
(Dict : in out Natools.Smaz_4096.Dictionary;
Value : in String) is
begin
if Current_Index > 0 then
Dict.Offsets (Current_Index) := Current_Offset;
end if;
Dict.Values (Current_Offset .. Current_Offset + Value'Length - 1)
:= Value;
Current_Index := Current_Index + 1;
Current_Offset := Current_Offset + Value'Length;
end Push_Value;
begin
return Dict : Natools.Smaz_4096.Dictionary
:= (Last_Code => 4059,
Values_Last => 8864,
Variable_Length_Verbatim => Variable_Length_Verbatim,
Max_Word_Length => 3,
Offsets => <>,
Values => <>,
Hash => Dictionary_4096_Hash'Access)
do
-- 0 .. 255: ASCII table
for C in Character loop
Push_Value (Dict, (1 => C));
end loop;
-- 256 .. 355: two-digit numbers
for U in Digit_Rank loop
for V in Digit_Rank loop
Push_Value (Dict, (1 => Image (U), 2 => Image (V)));
end loop;
end loop;
-- 356 .. 1355: three-digit numbers
for U in Digit_Rank loop
for V in Digit_Rank loop
for W in Digit_Rank loop
Push_Value
(Dict, (1 => Image (U), 2 => Image (V), 3 => Image (W)));
end loop;
end loop;
end loop;
-- 1356 .. 2031: two lower-case letters
for M in Letter_Rank loop
for N in Letter_Rank loop
Push_Value (Dict, (1 => Lower (M), 2 => Lower (N)));
end loop;
end loop;
-- 2032 .. 2707: lower-case then upper-case letter
for M in Letter_Rank loop
for N in Letter_Rank loop
Push_Value (Dict, (1 => Lower (M), 2 => Upper (N)));
end loop;
end loop;
-- 2708 .. 3383: upper-case then lower-case letter
for M in Letter_Rank loop
for N in Letter_Rank loop
Push_Value (Dict, (1 => Upper (M), 2 => Lower (N)));
end loop;
end loop;
-- 3384 .. 4059: two upper-case letters
for M in Letter_Rank loop
for N in Letter_Rank loop
Push_Value (Dict, (1 => Upper (M), 2 => Upper (N)));
end loop;
end loop;
pragma Assert (Current_Index = Dict.Last_Code + 1);
pragma Assert (Current_Offset = Dict.Values_Last + 1);
end return;
end Dictionary_4096;
function Dictionary_4096_Hash (S : in String) return Natural is
function Rank (C : Character) return Natural
is (case C is
when '0' .. '9' => Character'Pos (C) - Character'Pos ('0'),
when 'a' .. 'z' => Character'Pos (C) - Character'Pos ('a'),
when 'A' .. 'Z' => Character'Pos (C) - Character'Pos ('A'),
when others => raise Program_Error);
begin
case S'Length is
when 1 =>
return Character'Pos (S (S'First));
when 2 =>
declare
U : constant Character := S (S'First);
V : constant Character := S (S'Last);
begin
if U in '0' .. '9' and then V in '0' .. '9' then
return 256 + Rank (U) * 10 + Rank (V);
elsif U in 'a' .. 'z' and then V in 'a' .. 'z' then
return 1356 + Rank (U) * 26 + Rank (V);
elsif U in 'a' .. 'z' and then V in 'A' .. 'Z' then
return 2032 + Rank (U) * 26 + Rank (V);
elsif U in 'A' .. 'Z' and then V in 'a' .. 'z' then
return 2708 + Rank (U) * 26 + Rank (V);
elsif U in 'A' .. 'Z' and then V in 'A' .. 'Z' then
return 3384 + Rank (U) * 26 + Rank (V);
else
return 4096;
end if;
end;
when 3 =>
declare
U : constant Character := S (S'First);
V : constant Character := S (S'First + 1);
W : constant Character := S (S'First + 2);
begin
if U in '0' .. '9'
and then V in '0' .. '9'
and then W in '0' .. '9'
then
return 356 + Rank (U) * 100 + Rank (V) * 10 + Rank (W);
else
return 4096;
end if;
end;
when others =>
return 4096;
end case;
end Dictionary_4096_Hash;
procedure Generic_Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz.Dictionary;
Decompressed : in String;
Compressed : in Ada.Streams.Stream_Element_Array)
is
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Test.Report_Exception (Error, NT.Fail);
end;
end Generic_Roundtrip_Test;
procedure Roundtrip_Test is new Generic_Roundtrip_Test
(Natools.Smaz_256, Decimal_Image);
-- procedure Roundtrip_Test is new Generic_Roundtrip_Test
-- (Natools.Smaz_4096, Direct_Image);
procedure Roundtrip_Test is new Generic_Roundtrip_Test
(Natools.Smaz_64, Direct_Image);
-------------------------
-- Complete Test Suite --
-------------------------
procedure All_Tests (Report : in out NT.Reporter'Class) is
begin
Report.Section ("Base 256");
All_Tests_256 (Report);
Report.End_Section;
Report.Section ("Base 64");
All_Tests_64 (Report);
Report.End_Section;
Report.Section ("Base 4096");
All_Tests_4096 (Report);
Report.End_Section;
end All_Tests;
------------------------------
-- Test Suite for Each Base --
------------------------------
procedure All_Tests_256 (Report : in out NT.Reporter'Class) is
begin
Test_Validity_256 (Report);
Sample_Strings_256 (Report);
end All_Tests_256;
procedure All_Tests_4096 (Report : in out NT.Reporter'Class) is
begin
declare
Dict : constant Smaz_4096.Dictionary := Dictionary_4096 (False);
begin
Report.Section ("Without variable-length verbatim");
Test_Validity_4096 (Report, Dict);
Report.End_Section;
end;
declare
Dict : constant Smaz_4096.Dictionary := Dictionary_4096 (True);
begin
Report.Section ("With variable-length verbatim");
Test_Validity_4096 (Report, Dict);
Report.End_Section;
end;
end All_Tests_4096;
procedure All_Tests_64 (Report : in out NT.Reporter'Class) is
begin
Test_Validity_64 (Report);
Sample_Strings_64 (Report);
Sample_Strings_VLV_64 (Report);
end All_Tests_64;
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if not Natools.Smaz_256.Is_Valid (Smaz_Original.Dictionary) then
Test.Fail;
end if;
exception
when Error : others => Test.Report_Exception (Error);
end Test_Validity_256;
--------------------------------
-- Individual Base-4096 Tests --
--------------------------------
procedure Test_Validity_4096
(Report : in out NT.Reporter'Class;
Dictionary : in Smaz_4096.Dictionary)
is
Test : NT.Test := Report.Item ("Test dictionary validity");
begin
if not Smaz_4096.Is_Valid (Dictionary) then
Test.Fail;
end if;
exception
when Error : others => Test.Report_Exception (Error);
end Test_Validity_4096;
procedure Test_Validity_4096 (Report : in out NT.Reporter'Class) is
begin
Test_Validity_4096 (Report, Dictionary_4096 (False));
Test_Validity_4096 (Report, Dictionary_4096 (True));
end Test_Validity_4096;
------------------------------
-- Individual Base-64 Tests --
------------------------------
procedure Sample_Strings_64 (Report : in out NT.Reporter'Class) is
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