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Diffstat (limited to 'src/flags.h')
| -rw-r--r-- | src/flags.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/flags.h b/src/flags.h new file mode 100644 index 00000000..69e40e4b --- /dev/null +++ b/src/flags.h @@ -0,0 +1,209 @@ +/* + * Copyright (c) 2003-2009, John Wiegley. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of New Artisans LLC nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * @addtogroup util + */ + +/** + * @file flags.h + * @author John Wiegley + * + * @ingroup util + */ +#ifndef _FLAGS_H +#define _FLAGS_H + + +template <typename T = boost::uint_least8_t, typename U = T> +class supports_flags +{ +public: + typedef T flags_t; + +protected: + flags_t _flags; + +public: + supports_flags() : _flags(static_cast<T>(0)) { + TRACE_CTOR(supports_flags, ""); + } + supports_flags(const supports_flags& arg) : _flags(arg._flags) { + TRACE_CTOR(supports_flags, "copy"); + } + supports_flags(const flags_t& arg) : _flags(arg) { + TRACE_CTOR(supports_flags, "const flags_t&"); + } + ~supports_flags() throw() { + TRACE_DTOR(supports_flags); + } + + supports_flags& operator=(const supports_flags& other) { + _flags = other._flags; + return *this; + } + + flags_t flags() const { + return _flags; + } + bool has_flags(const flags_t arg) const { + return _flags & arg; + } + + void set_flags(const flags_t arg) { + _flags = arg; + } + void clear_flags() { + _flags = static_cast<T>(0); + } + void add_flags(const flags_t arg) { + _flags = static_cast<T>(static_cast<U>(_flags) | static_cast<U>(arg)); + } + void drop_flags(const flags_t arg) { + _flags = static_cast<T>(static_cast<U>(_flags) & static_cast<U>(~arg)); + } + +#if defined(HAVE_BOOST_SERIALIZATION) +private: + friend class boost::serialization::access; + + template<class Archive> + void serialize(Archive& ar, const unsigned int /* version */) + { + ar & _flags; + } +#endif // HAVE_BOOST_SERIALIZATION +}; + +template <typename T = boost::uint_least8_t, typename U = T> +class basic_flags_t : public supports_flags<T, U> +{ +public: + basic_flags_t() { + TRACE_CTOR(basic_flags_t, ""); + } + basic_flags_t(const T& bits) { + TRACE_CTOR(basic_flags_t, "const T&"); + set_flags(bits); + } + basic_flags_t(const U& bits) { + TRACE_CTOR(basic_flags_t, "const U&"); + set_flags(static_cast<T>(bits)); + } + ~basic_flags_t() throw() { + TRACE_DTOR(basic_flags_t); + } + + basic_flags_t(const basic_flags_t& other) + : supports_flags<T, U>(other) { + TRACE_CTOR(basic_flags_t, "copy"); + } + basic_flags_t& operator=(const basic_flags_t& other) { + set_flags(other.flags()); + return *this; + } + basic_flags_t& operator=(const T& bits) { + set_flags(bits); + return *this; + } + + operator T() const { + return supports_flags<T, U>::flags(); + } + operator U() const { + return supports_flags<T, U>::flags(); + } + + basic_flags_t plus_flags(const T& arg) const { + basic_flags_t temp(*this); + temp.add_flags(arg); + return temp; + } + basic_flags_t minus_flags(const T& arg) const { + basic_flags_t temp(*this); + temp.drop_flags(arg); + return temp; + } +}; + +template <typename T = boost::uint_least8_t> +class delegates_flags : public boost::noncopyable +{ +public: + typedef T flags_t; + +protected: + supports_flags<T>& _flags; + +public: + delegates_flags() : _flags() { + TRACE_CTOR(delegates_flags, ""); + } + delegates_flags(supports_flags<T>& arg) : _flags(arg) { + TRACE_CTOR(delegates_flags, "const supports_flags<T>&"); + } + ~delegates_flags() throw() { + TRACE_DTOR(delegates_flags); + } + + flags_t flags() const { + return _flags.flags(); + } + bool has_flags(const flags_t arg) const { + return _flags.has_flags(arg); + } + + void set_flags(const flags_t arg) { + _flags.set_flags(arg); + } + void clear_flags() { + _flags.clear_flags(); + } + void add_flags(const flags_t arg) { + _flags.add_flags(arg); + } + void drop_flags(const flags_t arg) { + _flags.drop_flags(arg); + } + +#if defined(HAVE_BOOST_SERIALIZATION) +private: + friend class boost::serialization::access; + + template<class Archive> + void serialize(Archive& ar, const unsigned int /* version */) + { + ar & _flags; + } +#endif // HAVE_BOOST_SERIALIZATION +}; + +#endif // _FLAGS_H |