43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
|
// boost/filesystem/detail/macro_value.hpp -------------------------------------------//
|
||
|
|
|
||
|
|
// (C) Copyright John Maddock 2001 - 2003
|
||
|
|
// (C) Copyright Jens Maurer 2001
|
||
|
|
// (C) Copyright Peter Dimov 2001
|
||
|
|
// (C) Copyright Darin Adler 2001
|
||
|
|
// (C) Copyright Beman Dawes 2002
|
||
|
|
|
||
|
|
// Distributed under the Boost Software License, Version 1.0.
|
||
|
|
// See http://www.boost.org/LICENSE_1_0.txt
|
||
|
|
|
||
|
|
// Library home page: http://www.boost.org/libs/filesystem
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------------------------//
|
||
|
|
|
||
|
|
#ifndef BOOST_FILESYSTEM_MACRO_VALUE_HPP
|
||
|
|
#define BOOST_FILESYSTEM_MACRO_VALUE_HPP
|
||
|
|
|
||
|
|
#include <boost/config.hpp>
|
||
|
|
#include <boost/assert.hpp>
|
||
|
|
#include <cstdlib>
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
inline const char* macro_value(const char* name, const char* value)
|
||
|
|
{
|
||
|
|
static const char* no_value = "[no value]";
|
||
|
|
static const char* not_defined = "[not defined]";
|
||
|
|
|
||
|
|
BOOST_ASSERT_MSG(name, "name argument must not be a null pointer");
|
||
|
|
BOOST_ASSERT_MSG(value, "value argument must not be a null pointer");
|
||
|
|
|
||
|
|
return strcmp(name, value + 1) ? ((*value && *(value + 1)) ? (value + 1) : no_value) : not_defined; // name == value+1 so the macro is not defined
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace detail
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#define BOOST_MACRO_VALUE(X) boost::detail::macro_value(#X, BOOST_STRINGIZE(=X))
|
||
|
|
|
||
|
|
#endif // BOOST_FILESYSTEM_MACRO_VALUE_HPP
|