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-- CXB30041.AM

--

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--

--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,

--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained

--     unlimited rights in the software and documentation contained herein.

--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making

--     this public release, the Government intends to confer upon all

--     recipients unlimited rights  equal to those held by the Government.

--     These rights include rights to use, duplicate, release or disclose the

--     released technical data and computer software in whole or in part, in

--     any manner and for any purpose whatsoever, and to have or permit others

--     to do so.

--

--                                    DISCLAIMER

--

--     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 functions To_C and To_Ada map between the Ada type

--      Character and the C type char.

--

--      Check that the function Is_Nul_Terminated returns True if the

--      char_array parameter contains nul, and otherwise False.

--

--      Check that the function To_C produces a correct char_array result,

--      with lower bound of 0, and length dependent upon the Item and

--      Append_Nul parameters.

--

--      Check that the function To_Ada produces a correct string result, with

--      lower bound of 1, and length dependent upon the Item and Trim_Nul

--      parameters.

--

--      Check that the function To_Ada raises Terminator_Error if the

--      parameter Trim_Nul is set to True, but the actual Item parameter

--      does not contain the nul char.

--

-- TEST DESCRIPTION:

--      This test uses a variety of Character, char, String, and char_array

--      objects to test versions of the To_C, To_Ada, and Is_Nul_Terminated

--      functions.

--

--      This test assumes that the following characters are all included

--      in the implementation defined type Interfaces.C.char:

--      ' ', ',', '.', '0'..'9', 'a'..'z' and 'A'..'Z'.

--

-- APPLICABILITY CRITERIA:

--      This test is applicable to all implementations that provide

--      package Interfaces.C.  If an implementation provides

--      package Interfaces.C, this test must compile, execute, and

--      report "PASSED".

--

-- SPECIAL REQUIREMENTS:

--      The file CXB30040.C must be compiled with a C compiler.

--      Implementation dialects of C may require alteration of

--      the C program syntax (see individual C files).

--

--      Note that the compiled C code must be bound with the compiled Ada

--      code to create an executable image.  An implementation must provide

--      the necessary commands to accomplish this.

--

--      Note that the C code included in CXB30040.C conforms

--      to ANSI-C.  Modifications to these files may be required for other

--      C compilers.  An implementation must provide the necessary

--      modifications to satisfy the function requirements.

--

-- TEST FILES:

--      The following files comprise this test:

--

--         CXB30040.C

--         CXB30041.AM

--

-- CHANGE HISTORY:

--      30 Aug 95   SAIC    Initial prerelease version.

--      09 May 96   SAIC    Incorporated reviewer comments for ACVC 2.1.

--      26 Oct 96   SAIC    Incorporated reviewer comments.

--      13 Sep 99   RLB     Replaced (bogus) Unchecked_Conversions with a

--                          C function character generator.

--

--!

with Report;

with Interfaces.C;                                            -- N/A => ERROR

with Ada.Characters.Latin_1;

with Ada.Exceptions;

with Ada.Strings.Fixed;

with Impdef;

procedure CXB30041 is

begin

   Report.Test ("CXB3004", "Check that the functions To_C and To_Ada " &

                           "produce correct results");

   Test_Block:

   declare

      use Interfaces, Interfaces.C;

      use Ada.Characters, Ada.Characters.Latin_1;

      use Ada.Exceptions;

      use Ada.Strings.Fixed;

      Start_Character,

      Stop_Character,

      TC_Character    : Character         := Character'First;

      TC_char,

      TC_Low_char,

      TC_High_char    : char              := char'First;

      TC_String       : String(1..8)      := (others => Latin_1.NUL);

      TC_char_array   : char_array(0..7)  := (others => C.nul);

      -- The function Char_Gen returns a character corresponding to its

      -- argument.

      --     Value   0 ..  9 ==> '0' .. '9'

      --     Value  10 .. 19 ==> 'A' .. 'J'

      --     Value  20 .. 29 ==> 'k' .. 't'

      --     Value  30       ==> ' '

      --     Value  31       ==> '.'

      --     Value  32       ==> ','

      function Char_Gen (Value   : in int) return char;

      -- Use the user-defined C function char_gen as a completion to the

      -- function specification above.

      pragma Import (Convention    => C,

                     Entity        => Char_Gen,

                     External_Name => Impdef.CXB30040_External_Name);

   begin

      -- Check that the functions To_C and To_Ada map between the Ada type

      -- Character and the C type char.

      if To_C(Ada.Characters.Latin_1.NUL) /= Interfaces.C.nul then

         Report.Failed("Incorrect result from To_C with NUL character input");

      end if;

      Start_Character := Report.Ident_Char('k');

      Stop_Character  := Report.Ident_Char('t');

      for TC_Character in Start_Character..Stop_Character loop

         if To_C(Item => TC_Character) /=

            Char_Gen(Character'Pos(TC_Character) - Character'Pos('k') + 20) then

            Report.Failed("Incorrect result from To_C with lower case " &

                          "alphabetic character input");

         end if;

      end loop;

      Start_Character := Report.Ident_Char('A');

      Stop_Character  := Report.Ident_Char('J');

      for TC_Character in Start_Character..Stop_Character loop

         if To_C(Item => TC_Character) /=

            Char_Gen(Character'Pos(TC_Character) - Character'Pos('A') + 10) then

            Report.Failed("Incorrect result from To_C with upper case " &

                          "alphabetic character input");

         end if;

      end loop;

      Start_Character := Report.Ident_Char('0');

      Stop_Character  := Report.Ident_Char('9');

      for TC_Character in Start_Character..Stop_Character loop

         if To_C(Item => TC_Character) /=

            Char_Gen(Character'Pos(TC_Character) - Character'Pos('0')) then

            Report.Failed("Incorrect result from To_C with digit " &

                          "character input");

         end if;

      end loop;

      if To_C(Item => ' ') /= Char_Gen(30) then

         Report.Failed("Incorrect result from To_C with space " &

                       "character input");

      end if;

      if To_C(Item => '.') /= Char_Gen(31) then

         Report.Failed("Incorrect result from To_C with dot " &

                       "character input");

      end if;

      if To_C(Item => ',') /= Char_Gen(32) then

         Report.Failed("Incorrect result from To_C with comma " &

                       "character input");

      end if;

      if To_Ada(Interfaces.C.nul) /= Ada.Characters.Latin_1.NUL then

         Report.Failed("Incorrect result from To_Ada with nul char input");

      end if;

      for Code in int range

         int(Report.Ident_Int(20)) .. int(Report.Ident_Int(29)) loop

            -- 'k' .. 't'

         if To_Ada(Item => Char_Gen(Code)) /=

            Character'Val (Character'Pos('k') + (Code - 20)) then

            Report.Failed("Incorrect result from To_Ada with lower case " &

                          "alphabetic char input");

         end if;

      end loop;

      for Code in int range

         int(Report.Ident_Int(10)) .. int(Report.Ident_Int(19)) loop

            -- 'A' .. 'J'

         if To_Ada(Item => Char_Gen(Code)) /=

            Character'Val (Character'Pos('A') + (Code - 10)) then

            Report.Failed("Incorrect result from To_Ada with upper case " &

                          "alphabetic char input");

         end if;

      end loop;

      for Code in int range

         int(Report.Ident_Int(0)) .. int(Report.Ident_Int(9)) loop

            -- '0' .. '9'

         if To_Ada(Item => Char_Gen(Code)) /=

            Character'Val (Character'Pos('0') + (Code)) then

            Report.Failed("Incorrect result from To_Ada with digit " &

                          "char input");

         end if;

      end loop;

      if To_Ada(Item => Char_Gen(30)) /= ' ' then

         Report.Failed("Incorrect result from To_Ada with space " &

                       "char input");

      end if;

      if To_Ada(Item => Char_Gen(31)) /= '.' then

         Report.Failed("Incorrect result from To_Ada with dot " &

                       "char input");

      end if;

      if To_Ada(Item => Char_Gen(32)) /= ',' then

         Report.Failed("Incorrect result from To_Ada with comma " &

                       "char input");

      end if;

      -- Check that the function Is_Nul_Terminated produces correct results

      -- whether or not the char_array argument contains the

      -- Ada.Interfaces.C.nul character.

      TC_String := "abcdefgh";

      if Is_Nul_Terminated(Item => To_C(TC_String, Append_Nul => False)) then

         Report.Failed("Incorrect result from Is_Nul_Terminated when no " &

                       "nul char is present");

      end if;

      if not Is_Nul_Terminated(To_C(TC_String, Append_Nul => True)) then

         Report.Failed("Incorrect result from Is_Nul_Terminated when the " &

                       "nul char is present");

      end if;

      -- Now that we've tested the character/char versions of To_Ada and To_C,

      -- use them to test the string versions.

      declare

         i                    : size_t  := 0;

         j                    : integer := 1;

         Incorrect_Conversion : Boolean := False;

         TC_No_nul       : constant char_array := To_C(TC_String, False);

         TC_nul_Appended : constant char_array := To_C(TC_String, True);

      begin

         -- Check that the function To_C produces a char_array result with

         -- lower bound of 0, and length dependent upon the Item and

         -- Append_Nul parameters (if Append_Nul is True, length is

         -- Item'Length + 1; if False, length is Item'Length).

         if TC_No_nul'First /= 0 or TC_nul_Appended'First /= 0 then

            Report.Failed("Incorrect lower bound from Function To_C");

         end if;

         if TC_No_nul'Length /= TC_String'Length then

            Report.Failed("Incorrect length returned from Function To_C " &

                          "when Append_Nul => False");

         end if;

         for TC_char in Report.Ident_Char('a')..Report.Ident_Char('h') loop

            if TC_No_nul(i)       /= To_C(TC_char) or -- Single character To_C.

               TC_nul_Appended(i) /= To_C(TC_char) then

               Incorrect_Conversion := True;

            end if;

            i := i + 1;

         end loop;

         if Incorrect_Conversion then

            Report.Failed("Incorrect result from To_C with string input " &

                          "and char_array result");

         end if;

         if TC_nul_Appended'Length /= TC_String'Length + 1 then

            Report.Failed("Incorrect length returned from Function To_C " &

                          "when Append_Nul => True");

         end if;

         if not Is_Nul_Terminated(TC_nul_Appended) then

            Report.Failed("No nul appended to the string parameter during " &

                          "conversion to char_array by function To_C");

         end if;

         -- Check that the function To_Ada produces a string result with

         -- lower bound of 1, and length dependent upon the Item and

         -- Trim_Nul parameters (if Trim_Nul is False, length is Item'Length;

         -- if True, length will be the length of the slice of Item prior to

         -- the first nul).

         declare

            TC_No_NUL_String       : constant String :=

                                       To_Ada(Item     => TC_nul_Appended,

                                              Trim_Nul => True);

            TC_NUL_Appended_String : constant String :=

                                       To_Ada(TC_nul_Appended, False);

         begin

            if TC_No_NUL_String'First       /= 1 or

               TC_NUL_Appended_String'First /= 1

            then

               Report.Failed("Incorrect lower bound from Function To_Ada");

            end if;

            if TC_No_NUL_String'Length /= TC_String'Length then

               Report.Failed("Incorrect length returned from Function " &

                             "To_Ada when Trim_Nul => True");

            end if;

            if TC_NUL_Appended_String'Length /= TC_String'Length + 1 then

               Report.Failed("Incorrect length returned from Function " &

                             "To_Ada when Trim_Nul => False");

            end if;

            Start_Character := Report.Ident_Char('a');

            Stop_Character  := Report.Ident_Char('h');

            for TC_Character in Start_Character..Stop_Character loop

               if TC_No_NUL_String(j)       /= TC_Character or

                  TC_NUL_Appended_String(j) /= TC_Character

               then

                  Report.Failed("Incorrect result from To_Ada with " &

                                "char_array input, index = "         &

                                Integer'Image(j));

               end if;

               j := j + 1;

            end loop;

         end;

         -- Check that the function To_Ada raises Terminator_Error if the

         -- parameter Trim_Nul is set to True, but the actual Item parameter

         -- does not contain the nul char.

         begin

            TC_String := To_Ada(TC_No_nul, Trim_Nul => True);

            Report.Failed("Terminator_Error not raised when Item "    &

                          "parameter of To_Ada does not contain the " &

                          "nul char, but parameter Trim_Nul => True");

            Report.Comment(TC_String & " printed to defeat optimization");

         exception

            when Terminator_Error => null;  -- OK, expected exception.

            when others           =>

               Report.Failed("Incorrect exception raised by function "  &

                             "To_Ada when the Item parameter does not " &

                             "contain the nul char, but parameter "     &

                             "Trim_Nul => True");

         end;

      end;

   exception

      when The_Error : others =>

         Report.Failed ("The following exception was raised in the " &

                        "Test_Block: " & Exception_Name(The_Error));

   end Test_Block;

   Report.Result;

end CXB30041;