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Jose Caban
2025-06-07 11:34:38 -04:00
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extern/stdcxx/4.2.1/tests/iostream/27.objects.cpp vendored Normal file
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/***************************************************************************
*
* 27.objects.cpp - test exercising lib.iostream.objects
*
* $Id: 27.objects.cpp 648752 2008-04-16 17:01:56Z faridz $
*
***************************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*
* Copyright 2000-2008 Rogue Wave Software, Inc.
*
**************************************************************************/
#include <driver.h>
// If the following macro is defined, then new header provides
// an implementation for operator new [] & delete []; undef them here
// so that the test can provide its own implementation for these operators
#undef _RWSTD_NO_OPERATOR_NEW_ARRAY
#undef _RWSTD_NO_OPERATOR_DELETE_ARRAY
#if defined (__IBMCPP__) && !defined (_RWSTD_NO_IMPLICIT_INCLUSION)
// disable implicit inclusion to work around
// a limitation in IBM VisualAge 5.0.2.0 (PR #26959)
# define _RWSTD_NO_IMPLICIT_INCLUSION
#endif
#if !defined (_MSC_VER) || _MSC_VER > 1300
// prevent out-of-line template definitions in .cc files from being
// explicitly #included during the processing of library headers (faster
// compilation) assumes that the test doesn't instantiate those templates
// on types other than those they were explcitly instantiated on (will
// have no effect if explicit instantiation is disabled or unsupported)
# define _RWSTD_NO_TEMPLATE_DEFINITIONS
#endif // !defined (_MSC_VER) || _MSC_VER > 1300
struct LifetimeChecker
{
LifetimeChecker ();
~LifetimeChecker ();
} lifetime_check;
#if defined (_WIN32) | defined (_WIN64)
// bring in <windows.h> as a compilation test to exercise
// any potential collisions with our declarations
# include <windows.h>
#endif
// include <iostream> *after* the definition of the global
// lifetime_checker object to exercise initialization and
// lifetime dependencies
#include <iostream> // for cin, cout, ...
#include <cstdlib> // for free(), malloc()
// make sure using declarations work (the test doesn't actually exploit
// the fact that the names are introduced into the global namespace)
_USING (std::cin);
_USING (std::cout);
_USING (std::cerr);
_USING (std::clog);
#ifndef _RWSTD_NO_WCHAR_T
_USING (std::wcin);
_USING (std::wcout);
_USING (std::wcerr);
_USING (std::wclog);
#endif // _RWSTD_NO_WCHAR_T
/**************************************************************************/
int init_new_calls; // number of calls to operator new during initialization
int init_delete_calls; // and operator delete
int new_calls; // total number of calls to operator new
int delete_calls; // and operator delete
int rw_opt_no_global_dtors; // for --no-global-dtors
int rw_opt_no_replacement_new; // for --no-replacement-new
int rw_opt_no_replacement_delete; // for --no-replacement-delete
/**************************************************************************/
LifetimeChecker::LifetimeChecker ()
{
// iostreams not yet initialized here
// <iostream> must be included before the definition of any
// global object whose ctor uses any of the standard objects
}
LifetimeChecker::~LifetimeChecker ()
{
if (rw_opt_no_global_dtors) {
rw_note (0, 0, __LINE__, "test of global dtors disabled");
}
else {
// objects must not be destroyed during program lifetime
// try to use them in the destructor of a global object...
std::cout << "[output from the dtor of a global object]";
std::cout << "[cout]";
std::cerr << "[cerr]";
std::clog << "[clog]";
#ifndef _RWSTD_NO_WCHAR_T
std::wcout << "[wcout]";
std::wcerr << "[wcerr]";
std::wclog << "[wclog]";
#endif // _RWSTD_NO_WCHAR_T
}
}
/**************************************************************************/
template <class charT>
void do_test (charT)
{
rw_info (0, 0, 0, "checking whether objects are initialized");
// objects must exist
rw_assert ( 0 != &std::cin && 0 != &std::cout
&& 0 != &std::cerr && 0 != &std::clog,
0, __LINE__, "std::cin, cout, cerr, or clog address 0");
rw_info (0, 0, __LINE__, "checking tied stream objects");
int new_0 = new_calls;
// exercise 27.3.1, p2
rw_assert (&std::cout == std::cin.tie (&std::cout), 0, __LINE__,
"&std::cout == std::cin.tie (&std::cout)");
rw_assert (0 == std::cout.tie (), 0, __LINE__,
"0 == std::cout.tie ()");
rw_assert (0 == std::cerr.tie (), 0, __LINE__,
"0 == std::cerr.tie ()");
rw_assert (0 == std::clog.tie (), 0, __LINE__,
"0 == std::clog.tie ()");
rw_assert (0 == new_calls - new_0, 0, __LINE__,
"unexpected dynamic memory allocation");
rw_info (0, 0, __LINE__, "checking for std::ios_base::unitbuf in flags");
new_0 = new_calls;
// exercise 27.3.1, p3
rw_assert (!(std::ios::unitbuf & std::cout.flags ()), 0, __LINE__,
"std::ios::unitbuf & std::cout.flags ()");
// exercise 27.3.1, p5
rw_assert (!!(std::ios::unitbuf & std::cerr.flags ()), 0, __LINE__,
"std::ios::unitbuf & std::cerr.flags ()");
// exercise 27.3.1, p6
rw_assert (!(std::ios::unitbuf & std::clog.flags ()), 0, __LINE__,
"std::ios::unitbuf & std::clog.flags ()");
rw_assert (0 == new_calls - new_0, 0, __LINE__,
"unexpected dynamic memory allocation");
#ifndef _RWSTD_NO_WCHAR_T
rw_assert ( 0 != &std::wcin && 0 != &std::wcout
&& 0 != &std::wcerr && 0 != &std::wclog,
0, __LINE__, "std::wcin, wcout, wcerr, or wclog address 0");
new_0 = new_calls;
// exercise 27.3.2, p2
rw_assert (&std::wcout == std::wcin.tie (&std::wcout), 0, __LINE__,
"&std::wcout == std::wcin.tie (&std::wcout)");
rw_assert (0 == std::wcout.tie (), 0, __LINE__,
"0 == std::wcout.tie ()");
rw_assert (0 == std::wcerr.tie (), 0, __LINE__,
"0 == std::wcerr.tie ()");
rw_assert (0 == std::wclog.tie (), 0, __LINE__,
"0 == std::wclog.tie ()");
rw_assert (0 == new_calls - new_0, 0, __LINE__,
"unexpected dynamic memory allocation");
new_0 = new_calls;
// exercise 27.3.2, p3
rw_assert (!(std::wios::unitbuf & std::wcout.flags ()), 0, __LINE__,
"std::wios::unitbuf & std::wcout.flags ()");
// exercise 27.3.2, p5
rw_assert (!!(std::wios::unitbuf & std::wcerr.flags ()), 0, __LINE__,
"std::wios::unitbuf & std::wcerr.flags ()");
// exercise 27.3.2, p6
rw_assert (!(std::wios::unitbuf & std::wclog.flags ()), 0, __LINE__,
"std::wios::unitbuf & std::wclog.flags ()");
rw_assert (0 == new_calls - new_0, 0, __LINE__,
"unexpected dynamic memory allocation");
#endif // _RWSTD_NO_WCHAR_T
std::cout << 0.0;
std::cerr << 0.0;
std::clog << 0.0;
#ifndef _RWSTD_NO_WCHAR_T
std::wcout << 0.0;
std::wcerr << 0.0;
std::wclog << 0.0;
#endif // _RWSTD_NO_WCHAR_T
std::cout << std::endl;
rw_info (0, 0, __LINE__, "exercising the ability to tie each stream "
"to itself without causing a deadlock");
std::cout.tie (&std::cout);
std::cout << std::cout.tie () << ' ';
std::cerr.tie (&std::cerr);
std::cerr << std::cerr.tie () << ' ';
std::clog.tie (&std::clog);
std::clog << std::clog.tie () << ' ';
#ifndef _RWSTD_NO_WCHAR_T
std::wcout.tie (&std::wcout);
std::wcout << std::wcout.tie () << ' ';
std::wcerr.tie (&std::wcerr);
std::wcerr << std::wcerr.tie () << ' ';
std::wclog.tie (&std::wclog);
std::wclog << std::wclog.tie () << ' ';
#endif // _RWSTD_NO_WCHAR_T
rw_info (0, 0, __LINE__, "exercising the ability to tie stream objects "
"together without causing a deadlock");
std::cout.tie (&std::cerr);
std::cout << std::cout.tie () << ' ';
std::cerr.tie (&std::cout);
std::cerr << std::cerr.tie () << ' ';
std::clog.tie (&std::cout);
std::clog << std::clog.tie () << ' ';
// untie all streams to free any memory dynamically
// allocated by calling tie (p) with (p != 0)
std::cin.tie (0);
std::cout.tie (0);
std::cerr.tie (0);
std::clog.tie (0);
#ifndef _RWSTD_NO_WCHAR_T
std::wcout.tie (&std::wcerr);
std::wcout << std::wcout.tie () << ' ';
std::wcerr.tie (&std::wcout);
std::wcerr << std::wcerr.tie () << ' ';
std::wclog.tie (&std::wcout);
std::wclog << std::wclog.tie () << ' ';
// untie all streams to free any memory dynamically
// allocated by calling tie (p) with (p != 0)
std::wcin.tie (0);
std::wcout.tie (0);
std::wcerr.tie (0);
std::wclog.tie (0);
#endif // _RWSTD_NO_WCHAR_T
std::cout << std::endl;
}
/**************************************************************************/
static int
run_test (int, char*[])
{
const int new_0 = new_calls;
const int delete_0 = delete_calls;
do_test (char ());
const int new_1 = new_calls - new_0;
const int delete_1 = delete_calls - delete_0;
// verify that test doesn't leak any dynamically allocated storage
rw_assert (0 == new_1 - delete_1, 0, __LINE__,
"test leaked %d blocks of memory", new_1 - delete_1);
rw_assert (0 == init_new_calls, 0, __LINE__,
"iostream initialization called operator new() %d times, "
"0 expected", init_new_calls);
#ifdef _RWSTD_NO_REPLACEABLE_NEW_DELETE
rw_warn (0, 0, __LINE__,
"replacement operators new and delete not tested: "
"_RWSTD_NO_REPLACEABLE_NEW_DELETE #defined");
#endif // _RWSTD_NO_REPLACEABLE_NEW_DELETE
return 0;
}
/**************************************************************************/
#ifndef _RWSTD_NO_REPLACEABLE_NEW_DELETE
# include <new>
# ifndef _RWSTD_BAD_ALLOC
// #define if not #defined by <new> (SunPro #includes its
// own <new> regardless of the preprocessor search path)
# define _RWSTD_BAD_ALLOC _STD::bad_alloc
# endif // _RWSTD_BAD_ALLOC
void* operator new (std::size_t n) _THROWS ((_RWSTD_BAD_ALLOC))
{
static int recursion;
++recursion;
if (rw_opt_no_replacement_new) {
static int noted; // prevent multiple notes
rw_note (noted++, 0, __LINE__,
"test of replacement operator new disabled");
}
else if (1 != recursion) {
// avoid calling rw_warn() except when it has something
// to warn about in case operator new() is being called
// by the compiler's C++ runtime (e.g., HP aCC 6.16)
// when the driver hasn't been initialized yet (otherwise
// the driver aborts)
rw_warn (1 == recursion, 0, __LINE__,
"recursive call to replacement operator new()");
}
else {
// initialize iostreams (verifies that initialization
// succeeds and is complete even if it occurs recursively)
static std::ios_base::Init io_initializer;
// use cout from within new to verify that the static local
// ios_base::Init properly initializes iostream objects
std::cout << "[replacement operator new (" << n << ")]\n";
}
++new_calls;
--recursion;
void* const ptr = std::malloc (n);
if (!ptr)
_THROW (_RWSTD_BAD_ALLOC ());
return ptr;
}
void operator delete (void *ptr) _THROWS (())
{
static int recursion;
++recursion;
if (rw_opt_no_replacement_delete) {
static int noted; // prevent multiple notes
rw_note (noted++, 0, __LINE__,
"test of replacement operator delete disabled");
}
else if (rw_warn (1 == recursion, 0, __LINE__,
"recursive call to replacement operator delete()")) {
std::cout << "[replacement operator delete (" << ptr << ")]\n";
}
--recursion;
if (ptr)
++delete_calls;
std::free (ptr);
}
void* operator new[] (std::size_t n) _THROWS ((_RWSTD_BAD_ALLOC))
{
return operator new (n);
}
void operator delete[] (void *p) _THROWS (())
{
operator delete (p);
}
#endif // _RWSTD_NO_REPLACEABLE_NEW_DELETE
/**************************************************************************/
int main (int argc, char *argv[])
{
init_new_calls = new_calls;
init_delete_calls = delete_calls;
return rw_test (argc, argv, __FILE__,
"lib.iostream.objects",
0, // no comment
run_test,
"|-no-global-dtors# "
"|-no-replacement-new# "
"|-no-replacement-delete#",
&rw_opt_no_global_dtors,
&rw_opt_no_replacement_new,
&rw_opt_no_replacement_delete);
}