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-- CXA4010.A

--

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--                                    DISCLAIMER

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--*

--

-- OBJECTIVE:

--      Check that the subprograms defined in package Ada.Strings.Unbounded

--      are available, and that they produce correct results. Specifically,

--      check the subprograms To_String, To_Unbounded_String, Insert, "&",

--      "*", Length, Slice, Replace_Slice, Overwrite, Index, Index_Non_Blank,

--      Head, Tail, and "=", "<=", ">=".

--

-- TEST DESCRIPTION:

--      This test demonstrates the uses of many of the subprograms defined

--      in package Ada.Strings.Unbounded for use with unbounded strings.

--      The test simulates how unbounded strings could be used

--      to simulate paragraphs of text.  Modifications could be easily be

--      performed using the provided subprograms (although in this test, the

--      main modification performed was the addition of more text to the

--      string).  One would not have to worry about the formatting of the

--      paragraph until it was finished and correct in content.  Then, once

--      all required editing is complete, the unbounded strings can be divided

--      up into the appropriate lengths based on particular formatting

--      requirements.  The test then compares the formatted text product

--      with a predefined "finished product".

--

--      This test uses a large number of the subprograms provided

--      by package Ada.Strings.Unbounded.  Often, the processing involved

--      could have been performed more efficiently using a minimum number

--      of the subprograms, in conjunction with loops, etc.  However, for

--      testing purposes, and in the interest of minimizing the number of

--      tests developed, subprogram variety and feature mixing was stressed.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--

--!

with Report;

with Ada.Strings.Maps;

with Ada.Strings.Unbounded;

procedure CXA4010 is

begin

   Report.Test ("CXA4010", "Check that the subprograms defined in "        &

                           "package Ada.Strings.Unbounded are available, " &

                           "and that they produce correct results");

   Test_Block:

   declare

      package ASUnb renames Ada.Strings.Unbounded;

      use type ASUnb.Unbounded_String;

      use Ada.Strings;

      Pamphlet_Paragraph_Count : constant :=  2;

      Lines                    : constant :=  4;

      Line_Length              : constant := 40;

      type Document_Type is array (Positive range <>)

        of ASUnb.Unbounded_String;

      type Camera_Ready_Copy_Type is array (1..Lines)

        of String (1..Line_Length);

      Pamphlet            : Document_Type (1..Pamphlet_Paragraph_Count);

      Camera_Ready_Copy   : Camera_Ready_Copy_Type :=

                              (others => (others => Ada.Strings.Space));

      TC_Finished_Product : Camera_Ready_Copy_Type :=

                          ( 1 => "Ada is a programming language designed  ",

                            2 => "to support long-lived, reliable software",

                            3 => " systems.                               ",

                            4 => "Go with Ada!                            ");

      -----

      procedure Enter_Text_Into_Document (Document : in out Document_Type) is

      begin

         -- Fill in both "paragraphs" of the document.  Each unbounded string

         -- functions as an individual paragraph, containing an unspecified

         -- number of characters.

         -- Use a variety of different unbounded string subprograms to load

         -- the data.

         Document(1) := ASUnb.To_Unbounded_String("Ada is a language");

         -- Insert the word "programming" prior to "language".

         Document(1) :=

           ASUnb.Insert(Document(1),

                        ASUnb.Index(Document(1),

                                    "language"),

                        ASUnb.To_String("progra" &           -- Str &

                                        ASUnb."*"(2,'m') &   -- Unbd &

                                        "ing "));            -- Str

         -- Overwrite the word "language" with "language" + additional text.

         Document(1) :=

           ASUnb.Overwrite(Document(1),

                           ASUnb.Index(Document(1),

                                       ASUnb.To_String(

                                         ASUnb.Tail(Document(1), 8, ' ')),

                                       Ada.Strings.Backward),

                           "language designed to support long-lifed");

         -- Replace the word "lifed" with "lived".

         Document(1) :=

           ASUnb.Replace_Slice(Document(1),

                               ASUnb.Index(Document(1), "lifed"),

                               ASUnb.Length(Document(1)),

                               "lived");

         -- Overwrite the word "lived" with "lived" + additional text.

         Document(1) :=

           ASUnb.Overwrite(Document(1),

                           ASUnb.Index(Document(1),

                                       ASUnb.To_String(

                                         ASUnb.Tail(Document(1), 5, ' ')),

                                       Ada.Strings.Backward),

                               "lived, reliable software systems.");

         -- Use several of the overloaded versions of "&" to form this

         -- unbounded string.

         Document(2) := 'G' &

                        ASUnb.To_Unbounded_String("o ") &

                        ASUnb.To_Unbounded_String("with") &

                        ' ' &

                        "Ada!";

      end Enter_Text_Into_Document;

      -----

      procedure Create_Camera_Ready_Copy

                  (Document    : in     Document_Type;

                   Camera_Copy :    out Camera_Ready_Copy_Type) is

      begin

         -- Break the unbounded strings into fixed lengths.

         -- Search the first unbounded string for portions of text that

         -- are less than or equal to the length of a string in the

         -- Camera_Ready_Copy_Type object.

         Camera_Copy(1) :=                 -- Take characters 1-39,

           ASUnb.Slice(Document(1),        -- and append a blank space.

                       1,

                       ASUnb.Index(ASUnb.To_Unbounded_String(

                                      ASUnb.Slice(Document(1),

                                                  1,

                                                  Line_Length)),

                                   Ada.Strings.Maps.To_Set(' '),

                                   Ada.Strings.Inside,

                                   Ada.Strings.Backward)) & ' ';

         Camera_Copy(2) :=                 -- Take characters 40-79.

           ASUnb.Slice(Document(1),

                       40,

                       (ASUnb.Index_Non_Blank          -- Should return 79

                          (ASUnb.To_Unbounded_String

                             (ASUnb.Slice(Document(1), -- Slice (40..79)

                                         40,

                                         79)),

                           Ada.Strings.Backward) + 39)); -- Increment since

                                                         -- this slice starts

                                                         -- at 40.

         Camera_Copy(3)(1..9) := ASUnb.Slice(Document(1), -- Characters 80-88

                                             80,

                                             ASUnb.Length(Document(1)));

         -- Break the second unbounded string into the appropriate length.

         -- It is only twelve characters in length, so the entire unbounded

         -- string will be placed on one string of the output object.

         Camera_Copy(4)(1..ASUnb.Length(Document(2))) :=

           ASUnb.To_String(ASUnb.Head(Document(2),

                                      ASUnb.Length(Document(2))));

      end Create_Camera_Ready_Copy;

      -----

      function Valid_Proofread (Draft, Master : Camera_Ready_Copy_Type)

        return Boolean is

      begin

         -- Evaluate strings for equality, using the operators defined in

         -- package Ada.Strings.Unbounded.  The less than/greater than or

         -- equal comparisons should evaluate to "equals => True".

         if ASUnb.To_Unbounded_String(Draft(1))   =       -- "="(Unb,Unb)

            ASUnb.To_Unbounded_String(Master(1))   and

            ASUnb.To_Unbounded_String(Draft(2))  <=       -- "<="(Unb,Unb)

            ASUnb.To_Unbounded_String(Master(2))   and

            ASUnb.To_Unbounded_String(Draft(3))  >=       -- ">="(Unb,Unb)

            ASUnb.To_Unbounded_String(Master(3))   and

            ASUnb.To_Unbounded_String(Draft(4))   =       -- "="(Unb,Unb)

            ASUnb.To_Unbounded_String(Master(4))

         then

            return True;

         else

            return False;

         end if;

      end Valid_Proofread;

      -----

   begin

      -- Enter text into the unbounded string paragraphs of the document.

      Enter_Text_Into_Document (Pamphlet);

      -- Reformat the unbounded strings into fixed string format.

      Create_Camera_Ready_Copy (Document    => Pamphlet,

                                Camera_Copy => Camera_Ready_Copy);

      -- Verify the conversion process.

      if not Valid_Proofread (Draft  => Camera_Ready_Copy,

                              Master => TC_Finished_Product)

      then

         Report.Failed ("Incorrect string processing result");

      end if;

   exception

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

   end Test_Block;

   Report.Result;

end CXA4010;