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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/ada/acats/tests/cxb/cxb3008.a
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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;