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-- CXB3014.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 Function Value with Pointer and Element
-- parameters will return an Element_Array result of correct size
-- and content (up to and including the first "terminator" Element).
--
-- Check that the Function Value with Pointer and Length parameters
-- will return an Element_Array result of appropriate size and content
-- (the first Length elements pointed to by the parameter Ref).
--
-- Check that both versions of Function Value will propagate
-- Interfaces.C.Strings.Dereference_Error when the value of
-- the Ref pointer parameter is null.
--
-- TEST DESCRIPTION:
-- This test tests that both versions of Function Value from the
-- generic package Interfaces.C.Pointers are available and produce
-- correct results. The generic package is instantiated with size_t,
-- char, char_array, and nul as actual parameters, and subtests are
-- performed on each of the Value functions resulting from this
-- instantiation.
-- For both function versions, a test is performed where a portion of
-- a char_array is to be returned as the function result. Likewise,
-- a test is performed where each version of the function returns the
-- entire char_array referenced by the in parameter Ref.
-- Finally, both versions of Function Value are called with a null
-- pointer reference, to ensure that Dereference_Error is raised in
-- this case.
--
-- 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
-- packages Interfaces.C.Strings and Interfaces.C.Pointers. If an
-- implementation provides packages Interfaces.C.Strings and
-- Interfaces.C.Pointers, this test must compile, execute, and
-- report "PASSED".
--
--
-- CHANGE HISTORY:
-- 19 Oct 95 SAIC Initial prerelease version.
-- 13 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
-- 23 Oct 96 SAIC Incorporated reviewer comments.
--
--!
with Report;
with Interfaces.C.Strings; -- N/A => ERROR
with Interfaces.C.Pointers; -- N/A => ERROR
procedure CXB3014 is
begin
Report.Test ("CXB3014", "Check that versions of the Value function " &
"from package Interfaces.C.Pointers produce " &
"correct results");
Test_Block:
declare
use type Interfaces.C.char, Interfaces.C.size_t;
Char_a : constant Interfaces.C.char := 'a';
Char_j : constant Interfaces.C.char := 'j';
Char_z : constant Interfaces.C.char := 'z';
subtype Lower_Case_chars is Interfaces.C.char range Char_a..Char_z;
subtype Char_Range is Interfaces.C.size_t range 0..26;
Local_nul : aliased Interfaces.C.char := Interfaces.C.nul;
TC_Array_Size : Interfaces.C.size_t := 20;
TC_String_1 : constant String := "abcdefghij";
TC_String_2 : constant String := "abcdefghijklmnopqrstuvwxyz";
TC_String_3 : constant String := "abcdefghijklmnopqrst";
TC_String_4 : constant String := "abcdefghijklmnopqrstuvwxyz";
TC_Blank_String : constant String := " ";
TC_Char_Array : Interfaces.C.char_array(Char_Range) :=
Interfaces.C.To_C(TC_String_2, True);
TC_Char_Array_1 : Interfaces.C.char_array(0..9);
TC_Char_Array_2 : Interfaces.C.char_array(Char_Range);
TC_Char_Array_3 : Interfaces.C.char_array(0..TC_Array_Size-1);
TC_Char_Array_4 : Interfaces.C.char_array(Char_Range);
package Char_Pointers is new
Interfaces.C.Pointers (Index => Interfaces.C.size_t,
Element => Interfaces.C.char,
Element_Array => Interfaces.C.char_array,
Default_Terminator => Interfaces.C.nul);
Char_Ptr : Char_Pointers.Pointer;
use type Char_Pointers.Pointer;
begin
-- Check that the Function Value with Pointer and Terminator Element
-- parameters will return an Element_Array result of appropriate size
-- and content (up to and including the first "terminator" Element.)
Char_Ptr := TC_Char_Array(0)'Access;
-- Provide a new Terminator char in the call of Function Value.
-- This call should return only a portion (the first 10 chars) of
-- the referenced char_array, up to and including the char 'j'.
TC_Char_Array_1 := Char_Pointers.Value(Ref => Char_Ptr,
Terminator => Char_j);
if Interfaces.C.To_Ada(TC_Char_Array_1, False) /= TC_String_1 or
Interfaces.C.Is_Nul_Terminated(TC_Char_Array_1)
then
Report.Failed("Incorrect result from Function Value with Ref " &
"and Terminator parameters, when supplied with " &
"a non-default Terminator char");
end if;
-- Use the default Terminator char in the call of Function Value.
-- This call should return the entire char_array, including the
-- terminating nul char.
TC_Char_Array_2 := Char_Pointers.Value(Char_Ptr);
if Interfaces.C.To_Ada(TC_Char_Array_2, True) /= TC_String_2 or
not Interfaces.C.Is_Nul_Terminated(TC_Char_Array_2)
then
Report.Failed("Incorrect result from Function Value with Ref " &
"and Terminator parameters, when using the " &
"default Terminator char");
end if;
-- Check that the Function Value with Pointer and Length parameters
-- will return an Element_Array result of appropriate size and content
-- (the first Length elements pointed to by the parameter Ref).
-- This call should return only a portion (the first 20 chars) of
-- the referenced char_array.
TC_Char_Array_3 :=
Char_Pointers.Value(Ref => Char_Ptr,
Length => Interfaces.C.ptrdiff_t(TC_Array_Size));
-- Verify the individual chars of the result.
for i in 0..TC_Array_Size-1 loop
if Interfaces.C.To_Ada(TC_Char_Array_3(i)) /=
TC_String_3(Integer(i)+1)
then
Report.Failed("Incorrect result from Function Value with " &
"Ref and Length parameters, when specifying " &
"a length less than the full array size");
exit;
end if;
end loop;
-- This call should return the entire char_array, including the
-- terminating nul char.
TC_Char_Array_4 := Char_Pointers.Value(Char_Ptr, 27);
if Interfaces.C.To_Ada(TC_Char_Array_4, True) /= TC_String_4 or
not Interfaces.C.Is_Nul_Terminated(TC_Char_Array_4)
then
Report.Failed("Incorrect result from Function Value with Ref " &
"and Length parameters, when specifying the " &
"entire array size");
end if;
-- Check that both of the above versions of Function Value will
-- propagate Interfaces.C.Strings.Dereference_Error when the value of
-- the Ref Pointer parameter is null.
Char_Ptr := null;
begin
TC_Char_Array_1 := Char_Pointers.Value(Ref => Char_Ptr,
Terminator => Char_j);
Report.Failed("Dereference_Error not raised by Function " &
"Value with Terminator parameter, when " &
"provided a null reference");
-- Call Report.Comment to ensure that the assignment to
-- TC_Char_Array_1 is not "dead", and therefore can not be
-- optimized away.
Report.Comment(Interfaces.C.To_Ada(TC_Char_Array_1, False));
exception
when Interfaces.C.Strings.Dereference_Error =>
null; -- OK, expected exception.
when others =>
Report.Failed("Incorrect exception raised by Function " &
"Value with Terminator parameter, when " &
"provided a null reference");
end;
begin
TC_Char_Array_3 :=
Char_Pointers.Value(Char_Ptr,
Interfaces.C.ptrdiff_t(TC_Array_Size));
Report.Failed("Dereference_Error not raised by Function " &
"Value with Length parameter, when provided " &
"a null reference");
-- Call Report.Comment to ensure that the assignment to
-- TC_Char_Array_3 is not "dead", and therefore can not be
-- optimized away.
Report.Comment(Interfaces.C.To_Ada(TC_Char_Array_3, False));
exception
when Interfaces.C.Strings.Dereference_Error =>
null; -- OK, expected exception.
when others =>
Report.Failed("Incorrect exception raised by Function " &
"Value with Length parameter, when " &
"provided a null reference");
end;
exception
when others => Report.Failed ("Exception raised in Test_Block");
end Test_Block;
Report.Result;
end CXB3014;
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