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-- CXB3008.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 functions imported from the C language <string.h> and
-- <stdlib.h> libraries can be called from an Ada program.
--
-- TEST DESCRIPTION:
-- This test checks that C language functions from the <string.h> and
-- <stdlib.h> libraries can be used as completions of Ada subprograms.
-- A pragma Import with convention identifier "C" is used to complete
-- the Ada subprogram specifications.
-- The three subprogram cases tested are as follows:
-- 1) A C function that returns an int value (strcpy) is used as the
-- completion of an Ada procedure specification. The return value
-- is discarded; parameter modification is the desired effect.
-- 2) A C function that returns an int value (strlen) is used as the
-- completion of an Ada function specification.
-- 3) A C function that returns a double value (strtod) is used as the
-- completion of an Ada function specification.
--
-- This test assumes that the following characters are all included
-- in the implementation defined type Interfaces.C.char:
-- ' ', 'a'..'z', 'A'..'Z', '0'..'9', and '$'.
--
-- APPLICABILITY CRITERIA:
-- This test is applicable to all implementations that provide
-- packages Interfaces.C and Interfaces.C.Strings. If an
-- implementation provides these packages, this test must compile,
-- execute, and report "PASSED".
--
-- SPECIAL REQUIREMENTS:
-- The C language library functions used by this test must be
-- available for importing into the test.
--
--
-- CHANGE HISTORY:
-- 12 Oct 95 SAIC Initial prerelease version.
-- 09 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
-- 01 DEC 97 EDS Replaced all references of C function atof with
-- C function strtod.
-- 29 JUN 98 EDS Give Ada function corresponding to strtod a
-- second parameter.
--!
with Report;
with Ada.Exceptions;
with Interfaces.C; -- N/A => ERROR
with Interfaces.C.Strings; -- N/A => ERROR
with Interfaces.C.Pointers;
procedure CXB3008 is
begin
Report.Test ("CXB3008", "Check that functions imported from the " &
"C language predefined libraries can be " &
"called from an Ada program");
Test_Block:
declare
package IC renames Interfaces.C;
package ICS renames Interfaces.C.Strings;
package ICP is new Interfaces.C.Pointers
( Index => IC.size_t,
Element => IC.char,
Element_Array => IC.char_array,
Default_Terminator => IC.nul );
use Ada.Exceptions;
use type IC.char;
use type IC.char_array;
use type IC.size_t;
use type IC.double;
-- The String_Copy procedure copies the string pointed to by Source,
-- including the terminating nul char, into the char_array pointed
-- to by Target.
procedure String_Copy (Target : out IC.char_array;
Source : in IC.char_array);
-- The String_Length function returns the length of the nul-terminated
-- string pointed to by The_String. The nul is not included in
-- the count.
function String_Length (The_String : in IC.char_array)
return IC.size_t;
-- The String_To_Double function converts the char_array pointed to
-- by The_String into a double value returned through the function
-- name. The_String must contain a valid floating-point number; if
-- not, the value returned is zero.
-- type Acc_ptr is access IC.char_array;
function String_To_Double (The_String : in IC.char_array ;
End_Ptr : ICP.Pointer := null)
return IC.double;
-- Use the <string.h> strcpy function as a completion to the procedure
-- specification. Note that the Ada interface to this C function is
-- in the form of a procedure (C function return value is not used).
pragma Import (C, String_Copy, "strcpy");
-- Use the <string.h> strlen function as a completion to the
-- String_Length function specification.
pragma Import (C, String_Length, "strlen");
-- Use the <stdlib.h> strtod function as a completion to the
-- String_To_Double function specification.
pragma Import (C, String_To_Double, "strtod");
TC_String : constant String := "Just a Test";
Char_Source : IC.char_array(0..30);
Char_Target : IC.char_array(0..30);
Double_Result : IC.double;
Source_Ptr,
Target_Ptr : ICS.chars_ptr;
begin
-- Check that the imported version of C function strcpy produces
-- the correct results.
Char_Source(0..21) := "Test of Pragma Import" & IC.nul;
String_Copy(Char_Target, Char_Source);
if Char_Target(0..21) /= Char_Source(0..21) then
Report.Failed("Incorrect result from the imported version of " &
"strcpy - 1");
end if;
if String_Length(Char_Target) /= 21 then
Report.Failed("Incorrect result from the imported version of " &
"strlen - 1");
end if;
Char_Source(0) := IC.nul;
String_Copy(Char_Target, Char_Source);
if Char_Target(0) /= Char_Source(0) then
Report.Failed("Incorrect result from the imported version of " &
"strcpy - 2");
end if;
if String_Length(Char_Target) /= 0 then
Report.Failed("Incorrect result from the imported version of " &
"strlen - 2");
end if;
-- The following chars_ptr designates a char_array of 12 chars
-- (including the terminating nul char).
Source_Ptr := ICS.New_Char_Array(IC.To_C(TC_String));
String_Copy(Char_Target, ICS.Value(Source_Ptr));
Target_Ptr := ICS.New_Char_Array(Char_Target);
if ICS.Value(Target_Ptr) /= TC_String then
Report.Failed("Incorrect result from the imported version of " &
"strcpy - 3");
end if;
if String_Length(ICS.Value(Target_Ptr)) /= TC_String'Length then
Report.Failed("Incorrect result from the imported version of " &
"strlen - 3");
end if;
Char_Source(0..9) := "100.00only";
Double_Result := String_To_Double(Char_Source);
Char_Source(0..13) := "5050.00$$$$$$$";
if Double_Result + String_To_Double(Char_Source) /= 5150.00 then
Report.Failed("Incorrect result returned from the imported " &
"version of function strtod - 1");
end if;
Char_Source(0..9) := "xxx$10.00x"; -- String doesn't contain a
-- valid floating point value.
if String_To_Double(Char_Source) /= 0.0 then
Report.Failed("Incorrect result returned from the imported " &
"version of function strtod - 2");
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 CXB3008;
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