-- CXA4024.A
--
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--                                    DISCLAIMER
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
--     PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
--      Check that the function "-", To_Ranges, To_Domain, and To_Range are
--      available in the package Ada.Strings.Maps, and that they produce
--      correct results based on the Character_Set/Character_Mapping input
--      provided.
--
-- TEST DESCRIPTION:
--      This test examines the operation of four functions from within the
--      Ada.Strings.Maps package.  A variety of Character_Sequence, 
--      Character_Set, and Character_Mapping objects are created and 
--      initialized for use with these functions.  In each subtest of
--      function operation, specific inputs are provided to the functions as
--      input parameters, and the results are evaluated against expected
--      values.  Wherever appropriate, additional characteristics of the
--      function results are verified against the prescribed result
--      characteristics.
--
--       
-- CHANGE HISTORY:
--      03 Feb 95   SAIC    Initial prerelease version
--      10 Mar 95   SAIC    Incorporated reviewer comments.
--      15 Apr 96   SAIC    Incorporated reviewer comments for ACVC 2.1.
--      05 Oct 96   SAIC    Incorporated reviewer comments for ACVC 2.1.
--
--!

with Ada.Strings.Maps;
with Ada.Strings.Maps.Constants;
with Ada.Characters.Latin_1;
with Report;

procedure CXA4024 is

begin

   Report.Test ("CXA4024", "Check that the function ""-"", To_Ranges, " &
                           "To_Domain, and To_Range are available in "  &
                           "the package Ada.Strings.Maps, and that "    &
                           "they produce correct results");

   Test_Block:
   declare

      use Ada.Strings, Ada.Strings.Maps;
      use type Maps.Character_Set;  -- To allow logical set operator 
                                    -- infix notation.
      package ACL1 renames Ada.Characters.Latin_1;
  
      MidPoint_Letter  : constant := 13;
      Last_Letter      : constant := 26;

      Vowels           : constant Maps.Character_Sequence := "aeiou";
      Quasi_Vowel      : constant Character := 'y';

      Alphabet         : Maps.Character_Sequence (1..Last_Letter);
      Half_Alphabet    : Maps.Character_Sequence (1..MidPoint_Letter);

      Alphabet_Set,
      Consonant_Set,
      Vowel_Set,
      First_Half_Set,
      Second_Half_Set  : Maps.Character_Set;


   begin

      -- Load the alphabet strings for use in creating sets.
      for i in 0..12 loop
         Half_Alphabet(i+1) := Character'Val(Character'Pos('a') + i);
      end loop;

      for i in 0..25 loop
         Alphabet(i+1) := Character'Val(Character'Pos('a') + i);
      end loop;

      -- Initialize a series of Character_Set objects.
      
      Alphabet_Set    := Maps.To_Set(Alphabet);
      Vowel_Set       := Maps.To_Set(Vowels);
      Consonant_Set   := Vowel_Set  XOR  Alphabet_Set;
      First_Half_Set  := Maps.To_Set(Half_Alphabet);
      Second_Half_Set := Alphabet_Set  XOR  First_Half_Set;



      -- Evaluation of Set operator "-".

      if Consonant_Set  /= "-"(Alphabet_Set, Vowel_Set)       or
         Vowel_Set      /= (Alphabet_Set - Consonant_Set)     or
         Alphabet_Set   /= Alphabet_Set - Maps.Null_Set       or
         First_Half_Set /= "-"(Alphabet_Set, Second_Half_Set) or
         (Alphabet_Set - Vowel_Set) /= "AND"(Alphabet_Set, "NOT"(Vowel_Set)) 
      then
         Report.Failed("Incorrect result from ""-"" operator for sets");
      end if;



      -- Evaluation of Function "To_Ranges".

      declare

         use type Maps.Character_Range;
         use type Maps.Character_Ranges;

         Set_A_to_C   : Maps.Character_Set   := Maps.To_Set("ABC");
         Set_J        : Maps.Character_Set   := Maps.To_Set("J");
         Set_M_to_P   : Maps.Character_Set   := Maps.To_Set("MNOP");
         Set_X_to_Z   : Maps.Character_Set   := Maps.To_Set("XYZ");
         Set_Of_Five  : Maps.Character_Set   := Set_A_to_C OR  -- Union of the
                                                Set_M_to_P OR  -- five sets.
                                                Set_X_to_Z OR
                                                Set_J      OR
                                                Maps.Null_Set;

         TC_Range_A_to_C : Maps.Character_Range := (Low => 'A', High => 'C');
         TC_Range_J      : Maps.Character_Range := ('J', 'J');
         TC_Range_M_to_P : Maps.Character_Range := ('M', 'P');
         TC_Range_X_to_Z : Maps.Character_Range := (Low => 'X', High => 'Z');

         TC_Ranges       : Maps.Character_Ranges (1..4) :=
                             (1 => TC_Range_A_to_C, 
                              2 => TC_Range_J,
                              3 => TC_Range_M_to_P, 
                              4 => TC_Range_X_to_Z);

      begin

         -- Based on input of a set containing four separate "spans" of
         -- character sequences, Function To_Ranges is required to produce
         -- the shortest array of contiguous ranges of Character values in
         -- the input set, in increasing order of Low.

         declare

            -- This Character_Ranges constant should consist of array
            -- components, each component being a Character_Range from Low
            -- to High containing the appropriate characters.

            Ranges_Result   : constant Maps.Character_Ranges :=
                                Maps.To_Ranges(Set => Set_Of_Five);
         begin

            -- Check the structure and components of the Character_Ranges 
            -- constant.

            if Ranges_Result(1)      /= TC_Range_A_to_C   or
               Ranges_Result(1).Low  /= TC_Ranges(1).Low  or
               Ranges_Result(2)      /= TC_Range_J        or
               Ranges_Result(2).High /= TC_Ranges(2).High or
               Ranges_Result(3)      /= TC_Range_M_to_P   or
               Ranges_Result(3).Low  /= TC_Ranges(3).Low  or   
               Ranges_Result(3).High /= TC_Ranges(3).High or  
               Ranges_Result(4)      /= TC_Range_X_To_Z   or
               Ranges_Result(4).Low  /= TC_Ranges(4).Low  or   
               Ranges_Result(4).High /= TC_Ranges(4).High
            then
               Report.Failed ("Incorrect structure or components in " &
                              "Character_Ranges constant");
            end if;
            
         exception
            when others => 
              Report.Failed("Exception raised using the Function To_Ranges " &
                            "to initialize a Character_Ranges constant");
         end;
      end;



      -- Evaluation of Functions To_Domain and To_Range.

      declare

         Null_Sequence          : constant Maps.Character_Sequence := "";

         TC_Upper_Case_Sequence : constant Maps.Character_Sequence :=
                                    "ZYXWVUTSRQPONMABCDEFGHIJKL";
         TC_Lower_Case_Sequence : constant Maps.Character_Sequence :=
                                    "zyxwvutsrqponmabcdefghijkl";
         TC_Unordered_Sequence  : Maps.Character_Sequence(1..6) := 
                                    "BxACzy";

         TC_Upper_to_Lower_Map  : Maps.Character_Mapping :=
                                    Maps.To_Mapping(TC_Upper_Case_Sequence,
                                                    TC_Lower_Case_Sequence);

         TC_Lower_to_Upper_Map  : Maps.Character_Mapping :=
                                    Maps.To_Mapping(TC_Lower_Case_Sequence,
                                                    TC_Upper_Case_Sequence);

         TC_Unordered_Map       : Maps.Character_Mapping :=
                                    Maps.To_Mapping(TC_Unordered_Sequence, 
                                                    "ikglja");
      begin

         declare

            TC_Domain_1 : constant Maps.Character_Sequence := 
                              Maps.To_Domain(TC_Upper_to_Lower_Map);
                              
            TC_Domain_2 : constant Maps.Character_Sequence := 
                              Maps.To_Domain(TC_Lower_to_Upper_Map);

            TC_Domain_3 : Maps.Character_Sequence(1..6);

            TC_Range_1  : constant Maps.Character_Sequence :=
                              Maps.To_Range(TC_Upper_to_Lower_Map);

            TC_Range_2  : constant Maps.Character_Sequence :=
                              Maps.To_Range(TC_Lower_to_Upper_Map);

            TC_Range_3  : Maps.Character_Sequence(1..6);

         begin

            -- Function To_Domain returns the shortest Character_Sequence
            -- value such that each character not in the result maps to
            -- itself, and all characters in the result are in ascending 
            -- order.

            TC_Domain_3 := Maps.To_Domain(TC_Unordered_Map);

            -- Check contents of result of To_Domain, must be in ascending
            -- order.

            if TC_Domain_1 /= "ABCDEFGHIJKLMNOPQRSTUVWXYZ" then
               Report.Failed("Incorrect result from To_Domain with " &
                             "TC_Upper_to_Lower_Map as input");
            end if;

            if TC_Domain_2 /= "abcdefghijklmnopqrstuvwxyz" then
               Report.Failed("Incorrect result from To_Domain with " &
                             "TC_Lower_to_Upper_Map as input");
            end if;

            if TC_Domain_3 /= "ABCxyz" then        
               Report.Failed("Incorrect result from To_Domain with " &
                             "an unordered mapping as input");
            end if;


            -- The lower bound on the returned Character_Sequence value
            -- from To_Domain must be 1.

            if TC_Domain_1'First /= 1 or 
               TC_Domain_2'First /= 1 or
               TC_Domain_3'First /= 1
            then
               Report.Failed("Incorrect lower bound returned from To_Domain");
            end if;


            -- Check contents of result of To_Range.

            TC_Range_3 := Maps.To_Range(TC_Unordered_Map);

            if TC_Range_1 /= "abcdefghijklmnopqrstuvwxyz" then
               Report.Failed("Incorrect result from To_Range with " &
                             "TC_Upper_to_Lower_Map as input");
            end if;

            if TC_Range_2 /= "ABCDEFGHIJKLMNOPQRSTUVWXYZ" then
               Report.Failed("Incorrect result from To_Range with " &
                             "TC_Lower_to_Upper_Map as input");
            end if;

            if TC_Range_3 /= "gilkaj" then          
               Report.Failed("Incorrect result from To_Range with " &
                             "an unordered mapping as input");
            end if;


            -- The lower bound on the returned Character_Sequence value
            -- must be 1.

            if TC_Range_1'First /= 1 or 
               TC_Range_2'First /= 1 or
               TC_Range_3'First /= 1
            then
               Report.Failed("Incorrect lower bound returned from To_Range");
            end if;


            -- The upper bound on the returned Character_Sequence value
            -- must be Map'Length.

            if TC_Range_1'Last /= TC_Lower_Case_Sequence'Length or
               TC_Range_2'Last /= TC_Upper_Case_Sequence'Length or
               TC_Range_3'Last /= TC_Unordered_Sequence'Length 
            then
               Report.Failed("Incorrect upper bound returned from To_Range");
            end if;

         end;

         -- Both function To_Domain and To_Range return the null string 
         -- when provided the Identity character map as an input parameter.

         if Maps.To_Domain(Maps.Identity) /= Null_Sequence then
            Report.Failed("Function To_Domain did not return the null " &
                          "string when provided the Identity map as "   &
                          "input");
         end if;

         if Maps.To_Range(Maps.Identity) /= Null_Sequence then
            Report.Failed("Function To_Range did not return the null " &
                          "string when provided the Identity map as "  &
                          "input");
         end if;

      exception
         when others => 
           Report.Failed("Exception raised during the evaluation of " &
                         "Function To_Domain and To_Range");
      end;

   exception
      when others => Report.Failed ("Exception raised in Test_Block");
   end Test_Block;


   Report.Result;

end CXA4024;