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|
-- CXB3010.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 Free resets the parameter Item to
-- Null_Ptr. Check that Free has no effect if Item is Null_Ptr.
--
-- Check that the version of Function Value with a chars_ptr parameter
-- returning a char_array result returns the prefix of an array of
-- chars.
--
-- Check that the version of Function Value with a chars_ptr parameter
-- and a size_t parameter returning a char_array result returns
-- the shorter of:
-- 1) the first size_t number of characters, or
-- 2) the characters up to and including the first nul.
--
-- Check that both of the above versions of Function Value propagate
-- Dereference_Error if the Item parameter is Null_Ptr.
--
-- TEST DESCRIPTION:
-- This test validates the Procedure Free and two versions of Function
-- Value. A variety of char_array and char_ptr values are provided as
-- input, 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:
-- 27 Sep 95 SAIC Initial prerelease version.
-- 13 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
-- 26 Oct 96 SAIC Incorporated reviewer comments.
-- 01 DEC 97 EDS Replicate line 199 at line 256, to ensure that
-- TC_chars_ptr has a valid pointer.
-- 08 JUL 99 RLB Added a test case to check that Value raises
-- Constraint_Error when Length = 0. (From Technical
-- Corrigendum 1).
-- 25 JAN 01 RLB Repaired previous test case to avoid raising
-- Constraint_Error in test case code.
-- 26 JAN 01 RLB Added an Ident_Int to the test case to prevent
-- optimization.
--!
with Report;
with Interfaces.C.Strings; -- N/A => ERROR
procedure CXB3010 is
begin
Report.Test ("CXB3010", "Check that Procedure Free and versions of " &
"Function Value produce correct results");
Test_Block:
declare
package IC renames Interfaces.C;
package ICS renames Interfaces.C.Strings;
use type IC.char_array;
use type IC.size_t;
use type ICS.chars_ptr;
use type IC.char;
Null_Char_Array_Access : constant ICS.char_array_access := null;
TC_String_1 : constant String := "Nonul";
TC_String_2 : constant String := "AbCdE";
TC_Blank_String : constant String(1..5) := (others => ' ');
-- The initialization of the following char_array objects
-- includes the appending of a terminating nul char, in order to
-- prevent the erroneous execution of Function Value.
TC_char_array : IC.char_array :=
IC.To_C(TC_Blank_String, True);
TC_char_array_1 : constant IC.char_array :=
IC.To_C(TC_String_1, True);
TC_char_array_2 : constant IC.char_array :=
IC.To_C(TC_String_2, True);
TC_Blank_char_array : constant IC.char_array :=
IC.To_C(TC_Blank_String, True);
-- This chars_ptr is initialized via the use of New_Chars_Array to
-- avoid erroneous execution of procedure Free.
TC_chars_ptr : ICS.chars_ptr :=
ICS.New_Char_Array(TC_Blank_char_array);
begin
-- Check that the Procedure Free resets the parameter Item
-- to Null_Ptr.
if TC_chars_ptr = ICS.Null_Ptr then
Report.Failed("TC_chars_ptr is currently null; it should not be " &
"null since it was given default initialization");
end if;
ICS.Free(TC_chars_ptr);
if TC_chars_ptr /= ICS.Null_Ptr then
Report.Failed("TC_chars_ptr was not set to Null_Ptr by " &
"Procedure Free");
end if;
-- Check that Free has no effect if Item is Null_Ptr.
begin
TC_chars_ptr := ICS.Null_Ptr; -- Ensure pointer is null.
ICS.Free(TC_chars_ptr);
if TC_chars_ptr /= ICS.Null_Ptr then
Report.Failed("TC_chars_ptr was set to a non-Null_Ptr value " &
"by Procedure Free. It was provided as a null " &
"parameter to Free, and there should have been " &
"no effect from a call to Procedure Free");
end if;
exception
when others =>
Report.Failed("Unexpected exception raised by Procedure Free " &
"when parameter Item is Null_Ptr");
end;
-- Check that the version of Function Value with a chars_ptr parameter
-- that returns a char_array result returns an array of chars (up to
-- and including the first nul).
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
TC_char_array := ICS.Value(Item => TC_chars_ptr);
if TC_char_array /= TC_char_array_1 or
IC.To_Ada(TC_char_array, True) /= IC.To_Ada(TC_char_array_1)
then
Report.Failed("Incorrect result from Function Value - 1");
end if;
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
TC_char_array := ICS.Value(Item => TC_chars_ptr);
if TC_char_array /= TC_char_array_2 or
IC.To_Ada(TC_char_array, True) /= IC.To_Ada(TC_char_array_2)
then
Report.Failed("Incorrect result from Function Value - 2");
end if;
if ICS.Value(Item => ICS.New_String("A little longer string")) /=
IC.To_C("A little longer string")
then
Report.Failed("Incorrect result from Function Value - 3");
end if;
-- Check that the version of Function Value with a chars_ptr parameter
-- and a size_t parameter that returns a char_array result returns
-- the shorter of:
-- 1) the first size_t number of characters, or
-- 2) the characters up to and including the first nul.
-- Case 1: the first size_t number of characters (less than the
-- total length).
begin
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
TC_char_array(0..2) := ICS.Value(Item => TC_chars_ptr, Length => 3);
if TC_char_array(0..2) /= TC_char_array_1(0..2)
then
Report.Failed
("Incorrect result from Function Value with Length " &
"parameter - 1");
end if;
exception
when others =>
Report.Failed("Exception raised during Case 1 evaluation");
end;
-- Case 2: the characters up to and including the first nul.
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
-- The length supplied as a parameter exceeds the total length of
-- TC_char_array_2. The result should be the entire TC_char_array_2
-- including the terminating nul.
TC_char_array := ICS.Value(Item => TC_chars_ptr, Length => 7);
if TC_char_array /= TC_char_array_2 or
IC.To_Ada(TC_char_array) /= IC.To_Ada(TC_char_array_2) or
not (IC.Is_Nul_Terminated(TC_char_array))
then
Report.Failed("Incorrect result from Function Value with Length " &
"parameter - 2");
end if;
-- Check that both of the above versions of Function Value propagate
-- Dereference_Error if the Item parameter is Null_Ptr.
declare
-- Declare a dummy function to demonstrate one way that a chars_ptr
-- variable could inadvertantly be set to Null_Ptr prior to a call
-- to Value (below).
function Freedom (Condition : Boolean := False;
Ptr : ICS.chars_ptr) return ICS.chars_ptr is
Pointer : ICS.chars_ptr := Ptr;
begin
if Condition then
ICS.Free(Pointer);
else
null; -- An activity that doesn't set the chars_ptr value to
-- Null_Ptr.
end if;
return Pointer;
end Freedom;
begin
begin
TC_char_array := ICS.Value(Item => Freedom(True, TC_chars_ptr));
Report.Failed
("Function Value (without Length parameter) did not " &
"raise Dereference_Error when provided a null Item " &
"parameter input value");
if TC_char_array(0) = '6' then -- Defeat optimization.
Report.Comment("Should never be printed");
end if;
exception
when ICS.Dereference_Error => null; -- OK, expected exception.
when others =>
Report.Failed("Incorrect exception raised by Function Value " &
"with Item parameter, when the Item parameter " &
"is Null_Ptr");
end;
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
begin
TC_char_array := ICS.Value(Item => Freedom(True, TC_chars_ptr),
Length => 4);
Report.Failed
("Function Value (with Length parameter) did not " &
"raise Dereference_Error when provided a null Item " &
"parameter input value");
if TC_char_array(0) = '6' then -- Defeat optimization.
Report.Comment("Should never be printed");
end if;
exception
when ICS.Dereference_Error => null; -- OK, expected exception.
when others =>
Report.Failed("Incorrect exception raised by Function Value " &
"with both Item and Length parameters, when " &
"the Item parameter is Null_Ptr");
end;
end;
-- Check that Function Value with two parameters propagates
-- Constraint_Error if Length is 0.
begin
TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
declare
TC : IC.char_array := ICS.Value(Item => TC_chars_ptr, Length =>
IC.Size_T(Report.Ident_Int(0)));
begin
Report.Failed
("Function Value (with Length parameter) did not " &
"raise Constraint_Error when Length = 0");
if TC'Length <= TC_char_array'Length then
TC_char_array(1..TC'Length) := TC; -- Block optimization of TC.
end if;
end;
Report.Failed
("Function Value (with Length parameter) did not " &
"raise Constraint_Error when Length = 0");
exception
when Constraint_Error => null; -- OK, expected exception.
when others =>
Report.Failed("Incorrect exception raised by Function Value " &
"with both Item and Length parameters, when " &
"Length = 0");
end;
exception
when others => Report.Failed ("Exception raised in Test_Block");
end Test_Block;
Report.Result;
end CXB3010;
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