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-- CXB3009.A

--

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--

--                                    DISCLAIMER

--

--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR

--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED

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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A

--     PARTICULAR PURPOSE OF SAID MATERIAL.

--*

--

-- OBJECTIVE:

--      Check that the function To_Chars_Ptr will return a Null_Ptr value

--      when the parameter Item is null.  If the parameter Item is not null,

--      and references a chars_array object that does contain the char nul,

--      and parameter Nul_Check is True, check that To_Chars_Ptr performs a

--      pointer conversion from char_array_access type to chars_ptr type.

--      Check that if parameter Item is not null, and references a

--      chars_array object that does not contain nul, and parameter Nul_Check

--      is True, the To_Chars_Ptr function will propagate Terminator_Error.

--      Check that if parameter Item is not null, and parameter Nul_Check

--      is False, check that To_Chars_Ptr performs a pointer conversion from

--      char_array_access type to chars_ptr type.

--

--      Check that the New_Char_Array function will return a chars_ptr type

--      pointer to an allocated object that has been initialized with

--      the value of parameter Chars.

--

--      Check that the function New_String returns a chars_ptr initialized

--      to a nul-terminated string having the value of the Str parameter.

--

-- TEST DESCRIPTION:

--      This test uses a variety of of string, char_array,

--      char_array_access and char_ptr values in order to validate the

--      functions under test, and results are compared for both length

--      and content.

--

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

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

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

--

-- APPLICABILITY CRITERIA:

--      This test is applicable to all implementations that provide

--      package Interfaces.C.Strings.  If an implementation provides

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

--      report "PASSED".

--

--

-- CHANGE HISTORY:

--      20 Sep 95   SAIC    Initial prerelease version.

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

--      01 DEC 97   EDS     Remove incorrect block of code (previously

--                          lines 264-287)

--      14 Sep 99   RLB     Added check for behavior of To_Chars_Ptr when

--                          Nul_Check => False. (From Technical

--                          Corrigendum 1).

--!

with Report;

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

with Ada.Characters.Latin_1;

with Ada.Exceptions;

with Ada.Strings.Fixed;

procedure CXB3009 is

begin

   Report.Test ("CXB3009", "Check that functions To_Chars_Ptr, "      &

                           "New_Chars_Array, and New_String produce " &

                           "correct results");

   Test_Block:

   declare

      package IC  renames Interfaces.C;

      package ICS renames Interfaces.C.Strings;

      use Ada.Exceptions;

      use type IC.char_array;

      use type IC.size_t;

      use type ICS.chars_ptr;

      Null_Char_Array_Access : constant ICS.char_array_access := null;

      Test_String            : constant String := "Test String";

      String_With_nul        : String(1..6)    := "Addnul";

      String_Without_nul     : String(1..6)    := "No nul";

      Char_Array_With_nul    : IC.char_array(0..6)   :=

                                 IC.To_C(String_With_nul, True);

      Char_Array_Without_nul : IC.char_array(0..5)   :=

                                 IC.To_C(String_Without_nul, False);

      Char_Array_W_nul_Ptr   : ICS.char_array_access :=

                                 new IC.char_array'(Char_Array_With_nul);

      Char_Array_WO_nul_Ptr  : ICS.char_array_access :=

                                 new IC.char_array'(Char_Array_Without_nul);

      TC_chars_ptr           : ICS.chars_ptr;

      TC_size_t              : IC.size_t := IC.size_t'First;

   begin

      -- Check that the function To_Chars_Ptr will return a Null_Ptr value

      -- when the parameter Item is null.

      if ICS.To_Chars_Ptr(Item      => Null_Char_Array_Access,

                          Nul_Check => False)     /= ICS.Null_Ptr   or

         ICS.To_Chars_Ptr(Null_Char_Array_Access,

                          Nul_Check => True)      /= ICS.Null_Ptr   or

         ICS.To_Chars_Ptr(Null_Char_Array_Access) /= ICS.Null_Ptr

      then

         Report.Failed("Incorrect result from function To_Chars_Ptr " &

                       "with parameter Item being a null value");

      end if;

      -- Check that if the parameter Item is not null, and references a

      -- chars_array object that does contain the nul char, and parameter

      -- Nul_Check is True, function To_Chars_Ptr performs a pointer

      -- conversion from char_array_access type to chars_ptr type.

      begin

         TC_chars_ptr := ICS.To_Chars_Ptr(Item      => Char_Array_W_nul_Ptr,

                                          Nul_Check => True);

         if ICS.Value(TC_chars_ptr) /= String_With_nul     or

            ICS.Value(TC_chars_ptr) /= Char_Array_With_nul

         then

            Report.Failed("Incorrect result from function To_Chars_Ptr " &

                          "with parameter Item being non-null and "      &

                          "containing the nul char");

         end if;

      exception

         when IC.Terminator_Error =>

           Report.Failed("Terminator_Error raised during the validation " &

                         "of Function To_Chars_Ptr");

         when others           =>

           Report.Failed("Unexpected exception raised during the " &

                         "validation of Function To_Chars_Ptr");

      end;

      -- Check that if parameter Item is not null, and references a

      -- chars_array object that does not contain nul, and parameter

      -- Nul_Check is True, the To_Chars_Ptr function will propagate

      -- Terminator_Error.

      begin

         TC_chars_ptr   := ICS.To_Chars_Ptr(Char_Array_WO_nul_Ptr, True);

         Report.Failed("Terminator_Error was not raised by function "   &

                       "To_Chars_Ptr when given a parameter Item that " &

                       "is non-null, and does not contain the nul "     &

                       "char, but parameter Nul_Check is True");

         TC_size_t := ICS.Strlen(TC_chars_ptr); -- Use TC_chars_ptr to

                                                -- defeat optimization;

      exception

          when IC.Terminator_Error => null;     -- Expected exception.

          when others              =>

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

                           "To_Chars_Ptr is given a parameter Item that " &

                           "is non-null, and does not contain the nul "   &

                           "char, but parameter Nul_Check is True");

      end;

      -- Check that if the parameter Item is not null, and parameter

      -- Nul_Check is False, function To_Chars_Ptr performs a pointer

      -- conversion from char_array_access type to chars_ptr type.

      begin

         TC_chars_ptr := ICS.To_Chars_Ptr(Item      => Char_Array_WO_nul_Ptr,

                                          Nul_Check => False);

         if ICS.Value(TC_chars_ptr, 6) /= String_Without_nul     or

            ICS.Value(TC_chars_ptr, 6) /= Char_Array_Without_nul

         then

            Report.Failed("Incorrect result from function To_Chars_Ptr " &

                          "with parameter Item being non-null and "      &

                          "Nul_Check False");

         end if;

      exception

         when IC.Terminator_Error =>

           Report.Failed("Terminator_Error raised during the validation " &

                         "of Function To_Chars_Ptr");

         when others           =>

           Report.Failed("Unexpected exception raised during the " &

                         "validation of Function To_Chars_Ptr");

      end;

      -- Check that the New_Char_Array function will return a chars_ptr type

      -- pointer to an allocated object that has been initialized with

      -- the value of parameter Chars.

      TC_chars_ptr := ICS.New_String("");

      ICS.Free(TC_chars_ptr);   -- Reset the chars_ptr to Null_Ptr;

      if TC_chars_ptr /= ICS.Null_Ptr then

         Report.Failed("Reset of TC_chars_ptr to Null not successful - 1");

      end if;

      TC_chars_ptr := ICS.New_Char_Array(Chars => Char_Array_With_nul);

      if TC_chars_ptr = ICS.Null_Ptr then    -- Check allocation.

         Report.Failed

           ("No allocation took place in call to New_Char_Array " &

            "with a non-null char_array parameter containing a "  &

            "terminating nul char");

      end if;

      -- Length of allocated array is determined using Strlen since array

      -- is nul terminated.  Contents of array are validated using Value.

      if ICS.Value (TC_chars_ptr, Length => 7) /= Char_Array_With_nul  or

         ICS.Strlen(Item => TC_chars_ptr)      /= 6

      then

         Report.Failed

           ("Incorrect length of allocated char_array resulting " &

            "from call of New_Char_Array with a non-null "        &

            "char_array parameter containing a terminating nul char");

      end if;

      ICS.Free(TC_chars_ptr);   -- Reset the chars_ptr to Null_Ptr;

      if TC_chars_ptr /= ICS.Null_Ptr then

         Report.Failed("Reset of TC_chars_ptr to Null not successful - 2");

      end if;

      TC_chars_ptr := ICS.New_Char_Array(Chars => Char_Array_Without_nul);

      if TC_chars_ptr = ICS.Null_Ptr then    -- Check allocation.

         Report.Failed

           ("No allocation took place in call to New_Char_Array " &

            "with a non-null char_array parameter that did not "  &

            "contain a terminating nul char");

      end if;

      -- Function Value is used with the total length of the

      -- Char_Array_Without_nul as a parameter to verify the allocation.

      if ICS.Value(Item => TC_chars_ptr, Length => 6) /=

         Char_Array_Without_nul                            or

         ICS.Strlen(Item => TC_chars_ptr)             /= 6

      then

         Report.Failed("Incorrect length of allocated char_array "     &

                       "resulting from call of New_Char_Array with "   &

                       "a non-null char_array parameter that did not " &

                       "contain a terminating nul char");

      end if;

      -- Check that the function New_String returns a chars_ptr specifying

      -- an allocated object initialized to the value of parameter Str.

      ICS.Free(TC_chars_ptr);   -- Reset the chars_ptr to Null_Ptr;

      if TC_chars_ptr /= ICS.Null_Ptr then

         Report.Failed("Reset of TC_chars_ptr to Null not successful - 3");

      end if;

      TC_chars_ptr := ICS.New_String(Str => Test_String);

      if ICS.Value(TC_chars_ptr) /= Test_String or

         ICS.Value(ICS.New_Char_Array(IC.To_C(Test_String,True))) /=

         Test_String

      then

         Report.Failed("Incorrect allocation resulting from function " &

                       "New_String with a string parameter value");

      end if;

      ICS.Free(TC_chars_ptr);   -- Reset the chars_ptr to Null_Ptr;

      if TC_chars_ptr /= ICS.Null_Ptr then

         Report.Failed("Reset of TC_chars_ptr to Null not successful - 4");

      end if;

      if ICS.Value(ICS.New_String(String_Without_nul)) /=

         String_Without_nul                               or

         ICS.Value(ICS.New_Char_Array(IC.To_C(String_Without_nul,False))) /=

         String_Without_nul

      then

         Report.Failed("Incorrect allocation resulting from function " &

                       "New_String with parameter value String_Without_nul");

      end if;

   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 CXB3009;