369 lines
9.9 KiB
C++
369 lines
9.9 KiB
C++
// -*- C++ -*-
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// Utility subroutines for the C++ library testsuite.
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//
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// Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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//
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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// This file provides the following:
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//
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// 1) VERIFY(), via DEBUG_ASSERT, from Brent Verner <brent@rcfile.org>.
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// This file is included in the various testsuite programs to provide
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// #define(able) assert() behavior for debugging/testing. It may be
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// a suitable location for other furry woodland creatures as well.
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//
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// 2) set_memory_limits()
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// set_memory_limits() uses setrlimit() to restrict dynamic memory
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// allocation. We provide a default memory limit if none is passed by the
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// calling application. The argument to set_memory_limits() is the
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// limit in megabytes (a floating-point number). If _GLIBCPP_MEM_LIMITS is
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// not #defined before including this header, then no limiting is attempted.
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//
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// 3) counter
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// This is a POD with a static data member, gnu_counting_struct::count,
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// which starts at zero, increments on instance construction, and decrements
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// on instance destruction. "assert_count(n)" can be called to VERIFY()
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// that the count equals N.
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//
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// 4) copy_tracker, from Stephen M. Webb <stephen@bregmasoft.com>.
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// A class with nontrivial ctor/dtor that provides the ability to track the
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// number of copy ctors and dtors, and will throw on demand during copy.
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//
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// 5) pod_char, pod_int, , abstract character classes and
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// char_traits specializations for testing instantiations.
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#ifndef _GLIBCPP_TESTSUITE_HOOKS_H
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#define _GLIBCPP_TESTSUITE_HOOKS_H
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#include <bits/c++config.h>
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#include <bits/functexcept.h>
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#include <cstddef>
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#ifdef DEBUG_ASSERT
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# include <cassert>
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# define VERIFY(fn) assert(fn)
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#else
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# define VERIFY(fn) test &= (fn)
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#endif
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#include <list>
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#include <locale>
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namespace __gnu_cxx_test
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{
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// All macros are defined in GLIBCPP_CONFIGURE_TESTSUITE and imported
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// from c++config.h
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// Set memory limits if possible, if not set to 0.
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#ifndef _GLIBCPP_MEM_LIMITS
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# define MEMLIMIT_MB 0
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#else
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# ifndef MEMLIMIT_MB
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# define MEMLIMIT_MB 16.0
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# endif
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#endif
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extern void
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set_memory_limits(float __size = MEMLIMIT_MB);
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// Check mangled name demangles (using __cxa_demangle) as expected.
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void
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verify_demangle(const char* mangled, const char* wanted);
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// Simple callback structure for variable numbers of tests (all with
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// same signature). Assume all unit tests are of the signature
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// void test01();
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typedef void (*test_func) (void);
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typedef std::list<test_func> func_callback;
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// Run select unit tests after setting global locale.
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void
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run_tests_wrapped_locale(const char*, const func_callback&);
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// Run select unit tests after setting environment variables.
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void
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run_tests_wrapped_env(const char*, const char*, const func_callback&);
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// Try to create a locale with the given name. If it fails, bail.
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std::locale
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try_named_locale(const char* name);
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// Test data types.
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struct pod_char
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{
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unsigned char c;
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};
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struct pod_int
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{
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int i;
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};
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struct pod_unsigned_int
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{
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unsigned int i;
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};
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struct pod_long
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{
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unsigned long i;
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};
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struct state
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{
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unsigned long l;
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unsigned long l2;
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};
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// Counting.
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struct counter
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{
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// Specifically and glaringly-obviously marked 'signed' so that when
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// COUNT mistakenly goes negative, we can track the patterns of
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// deletions more easily.
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typedef signed int size_type;
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static size_type count;
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counter() { ++count; }
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counter (const counter&) { ++count; }
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~counter() { --count; }
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};
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#define assert_count(n) VERIFY(__gnu_cxx_test::counter::count == n)
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// A (static) class for counting copy constructors and possibly throwing an
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// exception on a desired count.
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class copy_constructor
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{
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public:
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static unsigned int
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count() { return count_; }
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static void
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mark_call()
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{
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count_++;
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if (count_ == throw_on_)
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__throw_exception_again "copy constructor exception";
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}
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static void
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reset()
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{
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count_ = 0;
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throw_on_ = 0;
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}
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static void
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throw_on(unsigned int count) { throw_on_ = count; }
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private:
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static unsigned int count_;
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static unsigned int throw_on_;
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};
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// A (static) class for counting assignment operator calls and
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// possibly throwing an exception on a desired count.
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class assignment_operator
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{
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public:
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static unsigned int
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count() { return count_; }
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static void
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mark_call()
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{
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count_++;
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if (count_ == throw_on_)
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__throw_exception_again "assignment operator exception";
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}
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static void
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reset()
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{
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count_ = 0;
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throw_on_ = 0;
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}
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static void
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throw_on(unsigned int count) { throw_on_ = count; }
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private:
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static unsigned int count_;
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static unsigned int throw_on_;
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};
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// A (static) class for tracking calls to an object's destructor.
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class destructor
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{
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public:
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static unsigned int
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count() { return _M_count; }
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static void
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mark_call() { _M_count++; }
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static void
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reset() { _M_count = 0; }
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private:
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static unsigned int _M_count;
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};
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// An class of objects that can be used for validating various
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// behaviours and guarantees of containers and algorithms defined in
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// the standard library.
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class copy_tracker
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{
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public:
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// Creates a copy-tracking object with the given ID number. If
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// "throw_on_copy" is set, an exception will be thrown if an
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// attempt is made to copy this object.
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copy_tracker(int id = next_id_--, bool throw_on_copy = false)
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: id_(id) , throw_on_copy_(throw_on_copy) { }
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// Copy-constructs the object, marking a call to the copy
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// constructor and forcing an exception if indicated.
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copy_tracker(const copy_tracker& rhs)
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: id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
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{
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if (throw_on_copy_)
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copy_constructor::throw_on(copy_constructor::count() + 1);
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copy_constructor::mark_call();
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}
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// Assigns the value of another object to this one, tracking the
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// number of times this member function has been called and if the
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// other object is supposed to throw an exception when it is
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// copied, well, make it so.
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copy_tracker&
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operator=(const copy_tracker& rhs)
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{
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id_ = rhs.id();
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if (rhs.throw_on_copy_)
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assignment_operator::throw_on(assignment_operator::count() + 1);
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assignment_operator::mark_call();
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return *this;
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}
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~copy_tracker()
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{ destructor::mark_call(); }
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int
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id() const { return id_; }
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private:
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int id_;
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const bool throw_on_copy_;
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public:
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static void
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reset()
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{
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copy_constructor::reset();
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assignment_operator::reset();
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destructor::reset();
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}
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// for backwards-compatibility
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static int
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copyCount()
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{ return copy_constructor::count(); }
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// for backwards-compatibility
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static int
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dtorCount()
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{ return destructor::count(); }
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private:
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static int next_id_;
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};
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inline bool
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operator==(const copy_tracker& lhs, const copy_tracker& rhs)
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{ return lhs.id() == rhs.id(); }
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} // namespace __gnu_cxx_test
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namespace std
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{
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template<class _CharT>
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struct char_traits;
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// char_traits specialization
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template<>
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struct char_traits<__gnu_cxx_test::pod_char>
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{
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typedef __gnu_cxx_test::pod_char char_type;
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typedef __gnu_cxx_test::pod_int int_type;
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typedef long pos_type;
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typedef unsigned long off_type;
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typedef __gnu_cxx_test::state state_type;
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static void
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assign(char_type& __c1, const char_type& __c2);
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static bool
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eq(const char_type& __c1, const char_type& __c2);
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static bool
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lt(const char_type& __c1, const char_type& __c2);
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static int
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compare(const char_type* __s1, const char_type* __s2, size_t __n);
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static size_t
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length(const char_type* __s);
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static const char_type*
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find(const char_type* __s, size_t __n, const char_type& __a);
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static char_type*
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move(char_type* __s1, const char_type* __s2, size_t __n);
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static char_type*
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copy(char_type* __s1, const char_type* __s2, size_t __n);
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static char_type*
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assign(char_type* __s, size_t __n, char_type __a);
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static char_type
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to_char_type(const int_type& __c);
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static int_type
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to_int_type(const char_type& __c);
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static bool
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eq_int_type(const int_type& __c1, const int_type& __c2);
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static int_type
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eof();
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static int_type
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not_eof(const int_type& __c);
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};
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} // namespace std
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#endif // _GLIBCPP_TESTSUITE_HOOKS_H
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