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-- CXB3007.A
--
--                             Grant of Unlimited Rights
--
--     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 procedure To_C converts the Wide_Character elements
--      of a Wide_String parameter into wchar_t elements of the wchar_array
--      parameter Target, with wide_nul termination if parameter Append_Nul
--      is true.
--
--      Check that the out parameter Count of procedure To_C is set to the
--      appropriate value for both the wide_nul/no wide_nul terminated cases.
--
--      Check that Constraint_Error is propagated by procedure To_C if the
--      length of the wchar_array parameter Target is not sufficient to
--      hold the converted Wide_String value.
--
--      Check that the Procedure To_Ada converts wchar_t elements of the
--      wchar_array parameter Item to the corresponding Wide_Character
--      elements of Wide_String out parameter Target.
--
--      Check that Constraint_Error is propagated by Procedure To_Ada if the
--      length of Wide_String parameter Target is not long enough to hold the
--      converted wchar_array value.
--
--      Check that Terminator_Error is propagated by Procedure To_Ada if the
--      parameter Trim_Nul is set to True, but the actual Item parameter
--      contains no wide_nul wchar_t.
--
-- TEST DESCRIPTION:
--      This test uses a variety of Wide_String, and wchar_array objects to
--      test versions of the To_C and To_Ada procedures.
--
--      This test assumes that the following characters are all included
--      in the implementation defined type Interfaces.C.wchar_t:
--      ' ', 'a'..'z', 'A'..'Z', and '-'.
--
-- 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".
--
-- CHANGE HISTORY:
--      01 Sep 95   SAIC    Initial prerelease version.
--      09 May 96   SAIC    Incorporated reviewer comments for ACVC 2.1.
--      26 Oct 96   SAIC    Incorporated reviewer comments.
--      14 Sep 99   RLB     Removed incorrect and unnecessary
--                          Unchecked_Conversion.
--
--!

with Report;
with Interfaces.C;                                            -- N/A => ERROR
with Ada.Characters.Latin_1;
with Ada.Characters.Handling;
with Ada.Exceptions;
with Ada.Strings.Wide_Fixed;

procedure CXB3007 is
begin

   Report.Test ("CXB3007", "Check that the procedures To_C and To_Ada " &
                           "for wide strings produce correct results");
   Test_Block:
   declare

      use Interfaces, Interfaces.C;
      use Ada.Characters, Ada.Characters.Handling;
      use Ada.Exceptions;
      use Ada.Strings.Wide_Fixed;

      TC_Short_Wide_String  : Wide_String(1..4) :=
                                         (others => Wide_Character'First);
      TC_Wide_String        : Wide_String(1..8) :=
                                         (others => Wide_Character'First);
      TC_wchar_array        : wchar_array(0..7) := (others => wchar_t'First);
      TC_size_t_Count       : size_t            := size_t'First;
      TC_Natural_Count      : Natural           := Natural'First;


      -- We can use the wide character forms of To_Ada and To_C here to check
      -- the results; they were tested in CXB3006. We give them different
      -- names to avoid confusion below.

      function Wide_Character_to_wchar_t (Source : in Wide_Character)
          return wchar_t renames To_C;
      function wchar_t_to_Wide_Character (Source : in wchar_t)
          return Wide_Character renames To_Ada;

   begin

      -- Check that the procedure To_C converts the Wide_Character elements
      -- of a Wide_String parameter into wchar_t elements of wchar_array out
      -- parameter Target.
      --
      -- Case of wide_nul termination.

      TC_Wide_String(1..6) := "abcdef";

      To_C (Item       => TC_Wide_String(1..6),  -- Source slice of length 6.
            Target     => TC_wchar_array,
            Count      => TC_size_t_Count,
            Append_Nul => True);

      -- Check that the out parameter Count is set to the appropriate value
      -- for the wide_nul terminated case.

      if TC_size_t_Count /= 7 then
         Report.Failed("Incorrect setting of out parameter Count by " &
                       "Procedure To_C when Append_Nul => True");
      end if;

      for i in 1..TC_size_t_Count-1 loop
         if wchar_t_to_Wide_Character(TC_wchar_array(i-1)) /=
            TC_Wide_String(Integer(i))
         then
            Report.Failed("Incorrect result from Procedure To_C when "    &
                          "checking individual wchar_t values, case of "  &
                          "Append_Nul => True; "                          &
                          "wchar_t position = " & Integer'Image(Integer(i)));
         end if;
      end loop;

      if not Is_Nul_Terminated(TC_wchar_array) then
         Report.Failed("No wide_nul wchar_t appended to the wchar_array " &
                       "result from Procedure To_C when Append_Nul => True");
      end if;

      if TC_wchar_array(0..6) /= To_C("abcdef", True) then
         Report.Failed("Incorrect result from Procedure To_C when "   &
                       "directly comparing wchar_array results, case " &
                       "of Append_Nul => True");
      end if;


      -- Check Procedure To_C with no wide_nul termination.

      TC_wchar_array       := (others => Wide_Character_to_wchar_t('M'));
      TC_Wide_String(1..4) := "WXYZ";

      To_C (Item       => TC_Wide_String(1..4),  -- Source slice of length 4.
            Target     => TC_wchar_array,
            Count      => TC_size_t_Count,
            Append_Nul => False);

      -- Check that the out parameter Count is set to the appropriate value
      -- for the non-wide_nul terminated case.

      if TC_size_t_Count /= 4 then
         Report.Failed("Incorrect setting of out parameter Count by " &
                       "Procedure To_C when Append_Nul => False");
      end if;

      for i in 1..TC_size_t_Count loop
         if wchar_t_to_Wide_Character(TC_wchar_array(i-1)) /=
            TC_Wide_String(Integer(i))
         then
            Report.Failed("Incorrect result from Procedure To_C when "    &
                          "checking individual wchar_t values, case of "  &
                          "Append_Nul => False; "                         &
                          "wchar_t position = " & Integer'Image(Integer(i)));
         end if;
      end loop;

      if Is_Nul_Terminated(TC_wchar_array) then
         Report.Failed
           ("The wide_nul wchar_t was appended to the wchar_array " &
            "result of Procedure To_C when Append_Nul => False");
      end if;

      if TC_wchar_array(0..3) /= To_C("WXYZ", False) then
         Report.Failed("Incorrect result from Procedure To_C when "    &
                       "directly comparing wchar_array results, case " &
                       "of Append_Nul => False");
      end if;



      -- Check that Constraint_Error is raised by procedure To_C if the
      -- length of the target wchar_array parameter is not sufficient to
      -- hold the converted Wide_String value (plus wide_nul if Append_Nul
      -- is True).

      TC_wchar_array := (others => wchar_t'First);
      begin
         To_C("A string too long",
              TC_wchar_array,
              TC_size_t_Count,
              Append_Nul => True);

         Report.Failed("Constraint_Error not raised when the Target "    &
                       "parameter of Procedure To_C is not long enough " &
                       "to hold the converted Wide_String");
         Report.Comment
           (To_Character(wchar_t_to_Wide_Character(TC_wchar_array(0))) &
            " printed to defeat optimization");
      exception
         when Constraint_Error => null;  -- OK, expected exception.
         when others           =>
            Report.Failed("Incorrect exception raised by Procedure "    &
                          "To_C when the Target parameter is not long " &
                          "enough to contain the wchar_array result");
      end;



      -- Check that the procedure To_Ada converts wchar_t elements of the
      -- wchar_array parameter Item to the corresponding Wide_Character
      -- elements of Wide_String out parameter Target, with result wide
      -- string length based on the Trim_Nul parameter.
      --
      -- Case of appended wide_nul wchar_t on the wchar_array In parameter.

      TC_wchar_array :=
        To_C ("ACVC-95", Append_Nul => True); -- 8 total chars.

      To_Ada (Item     => TC_wchar_array,
              Target   => TC_Wide_String,
              Count    => TC_Natural_Count,
              Trim_Nul => False);

      if TC_Natural_Count /= 8 then
         Report.Failed("Incorrect value returned in out parameter Count " &
                       "by Procedure To_Ada, case of Trim_Nul => False");
      end if;

      for i in 1..TC_Natural_Count loop
         if Wide_Character_to_wchar_t(TC_Wide_String(i)) /=
            TC_wchar_array(size_t(i-1))
         then
            Report.Failed("Incorrect result from Procedure To_Ada when "   &
                          "checking individual wchar_t values, case of "   &
                          "Trim_Nul => False, when a wide_nul is present " &
                          "in the wchar_array input parameter; "           &
                          "position = " & Integer'Image(Integer(i)));
         end if;
      end loop;

      if TC_Wide_String(TC_Natural_Count) /= To_Wide_Character(Latin_1.Nul)
      then
         Report.Failed("Last Wide_Character of Wide_String result of "      &
                       "Procedure To_Ada is not Nul, even though a "        &
                       "wide_nul was present in the wchar_array argument, " &
                       "and the Trim_Nul parameter was set to False");
      end if;


      TC_Wide_String       := (others => Wide_Character'First);
      TC_wchar_array(0..3) := To_C ("XYz", Append_Nul => True); -- 4 chars.

      To_Ada (Item     => TC_wchar_array,
              Target   => TC_Wide_String,
              Count    => TC_Natural_Count,
              Trim_Nul => True);

      if TC_Natural_Count /= 3 then
         Report.Failed("Incorrect value returned in out parameter Count " &
                       "by Procedure To_Ada, case of Trim_Nul => True");
      end if;

      for i in 1..TC_Natural_Count loop
         if Wide_Character_to_wchar_t(TC_Wide_String(i)) /=
            TC_wchar_array(size_t(i-1))
         then
            Report.Failed("Incorrect result from Procedure To_Ada when "  &
                          "checking individual wchar_t values, case of "  &
                          "Trim_Nul => True, when a wide_nul is present " &
                          "in the wchar_array input parameter; "          &
                          "position = " & Integer'Image(Integer(i)));
         end if;
      end loop;

      if TC_Wide_String(TC_Natural_Count) = To_Wide_Character(Latin_1.Nul)
      then
         Report.Failed("Last Wide_Character of Wide_String result of " &
                       "Procedure To_Ada is  Nul, even though the "    &
                       "Trim_Nul parameter was set to True");
      end if;

      if TC_Wide_String(TC_Natural_Count+1) /= Wide_Character'First then
         Report.Failed("Incorrect replacement from To_Ada");
      end if;


      -- Case of no wide_nul wchar_t present in the wchar_array argument.

      TC_Wide_String := (others => Wide_Character'First);
      TC_wchar_array := To_C ("ABCDWXYZ", Append_Nul => False);

      To_Ada (Item     => TC_wchar_array,
              Target   => TC_Wide_String,
              Count    => TC_Natural_Count,
              Trim_Nul => False);

      if TC_Natural_Count /= 8 then
         Report.Failed("Incorrect value returned in out parameter Count "   &
                       "by Procedure To_Ada, case of Trim_Nul => False, "   &
                       "with no wide_nul wchar_t present in the parameter " &
                       "Item");
      end if;

      for i in 1..TC_Natural_Count loop
         if Wide_Character_to_wchar_t(TC_Wide_String(i)) /=
            TC_wchar_array(size_t(i-1))
         then
            Report.Failed("Incorrect result from Procedure To_Ada when " &
                          "checking individual wchar_t values, case of " &
                          "Trim_Nul => False, when a wide_nul is not "   &
                          "present in the wchar_array input parameter; " &
                          "position = " & Integer'Image(Integer(i)));
         end if;
      end loop;

      if TC_Wide_String(TC_Natural_Count) = To_Wide_Character(Latin_1.Nul)
      then
         Report.Failed("Last Wide_Character of Wide_String result of "      &
                       "Procedure To_Ada is Nul, even though the wide_nul " &
                       "wchar_t was not present in the parameter Item, "    &
                       "with the parameter Trim_Nul => False");
      end if;



      -- Check that the Procedure To_Ada raises Terminator_Error if the
      -- parameter Trim_Nul is set to True, but the actual Item parameter
      -- does not contain the wide_nul wchar_t.

      begin
         TC_Wide_String := (others => Wide_Character'First);
         TC_wchar_array := To_C ("ABCDWXYZ", Append_Nul => False);

         To_Ada(TC_wchar_array,
                TC_Wide_String,
                Count    => TC_Natural_Count,
                Trim_Nul => True);

         Report.Failed("Terminator_Error not raised when Item "    &
                       "parameter of To_Ada does not contain the " &
                       "wide_nul wchar_t, but parameter Trim_Nul => True");
         Report.Comment(To_String(TC_Wide_String) &
                        " printed to defeat optimization");
      exception
         when Terminator_Error => null;  -- OK, expected exception.
         when others           =>
            Report.Failed("Incorrect exception raised by Procedure "     &
                          "To_Ada when the Item parameter does not "     &
                          "contain the wide_nul wchar_t, but parameter " &
                          "Trim_Nul => True");
      end;



      -- Check that Constraint_Error is propagated by procedure To_Ada if the
      -- length of Wide_String parameter Target is not long enough to hold the
      -- converted wchar_array value (plus wide_nul if Trim_Nul is False).

      begin
         TC_wchar_array(0..4) := To_C ("ABCD", Append_Nul => True);

         To_Ada(TC_wchar_array(0..4),
                TC_Short_Wide_String, -- Length of 4.
                Count    => TC_Natural_Count,
                Trim_Nul => False);

         Report.Failed("Constraint_Error not raised when Wide_String " &
                       "parameter Target of Procedure To_Ada is not "  &
                       "long enough to hold the converted wchar_ts");
         Report.Comment(To_String(TC_Short_Wide_String) &
                        " printed to defeat optimization");
      exception
         when Constraint_Error => null;  -- OK, expected exception.
         when others           =>
            Report.Failed("Incorrect exception raised by Procedure "      &
                          "To_Ada when Wide_String parameter Target is "  &
                          "not long enough to hold the converted wchar_ts");
      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 CXB3007;