Chris@16: /*
Chris@16:  *
Chris@16:  * Copyright (c) 1998-2002
Chris@16:  * John Maddock
Chris@16:  *
Chris@16:  * Use, modification and distribution are subject to the 
Chris@16:  * Boost Software License, Version 1.0. (See accompanying file 
Chris@16:  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  */
Chris@16: 
Chris@16:  /*
Chris@16:   *   LOCATION:    see http://www.boost.org for most recent version.
Chris@16:   *   FILE         regex_raw_buffer.hpp
Chris@16:   *   VERSION      see <boost/version.hpp>
Chris@16:   *   DESCRIPTION: Raw character buffer for regex code.
Chris@16:   *                Note this is an internal header file included
Chris@16:   *                by regex.hpp, do not include on its own.
Chris@16:   */
Chris@16: 
Chris@16: #ifndef BOOST_REGEX_RAW_BUFFER_HPP
Chris@16: #define BOOST_REGEX_RAW_BUFFER_HPP
Chris@16: 
Chris@16: #ifndef BOOST_REGEX_CONFIG_HPP
Chris@16: #include <boost/regex/config.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: #include <algorithm>
Chris@16: #include <cstddef>
Chris@16: 
Chris@16: namespace boost{
Chris@16:    namespace re_detail{
Chris@16: 
Chris@16: #ifdef BOOST_MSVC
Chris@16: #pragma warning(push)
Chris@16: #pragma warning(disable: 4103)
Chris@16: #endif
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #  include BOOST_ABI_PREFIX
Chris@16: #endif
Chris@16: #ifdef BOOST_MSVC
Chris@16: #pragma warning(pop)
Chris@16: #endif
Chris@16: 
Chris@16: struct empty_padding{};
Chris@16: 
Chris@16: union padding
Chris@16: {
Chris@16:    void* p;
Chris@16:    unsigned int i;
Chris@16: };
Chris@16: 
Chris@16: template <int N>
Chris@16: struct padding3
Chris@16: {
Chris@16:    enum{
Chris@16:       padding_size = 8,
Chris@16:       padding_mask = 7
Chris@16:    };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct padding3<2>
Chris@16: {
Chris@16:    enum{
Chris@16:       padding_size = 2,
Chris@16:       padding_mask = 1
Chris@16:    };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct padding3<4>
Chris@16: {
Chris@16:    enum{
Chris@16:       padding_size = 4,
Chris@16:       padding_mask = 3
Chris@16:    };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct padding3<8>
Chris@16: {
Chris@16:    enum{
Chris@16:       padding_size = 8,
Chris@16:       padding_mask = 7
Chris@16:    };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct padding3<16>
Chris@16: {
Chris@16:    enum{
Chris@16:       padding_size = 16,
Chris@16:       padding_mask = 15
Chris@16:    };
Chris@16: };
Chris@16: 
Chris@16: enum{
Chris@16:    padding_size = padding3<sizeof(padding)>::padding_size,
Chris@16:    padding_mask = padding3<sizeof(padding)>::padding_mask
Chris@16: };
Chris@16: 
Chris@16: //
Chris@16: // class raw_storage
Chris@16: // basically this is a simplified vector<unsigned char>
Chris@16: // this is used by basic_regex for expression storage
Chris@16: //
Chris@16: 
Chris@16: class BOOST_REGEX_DECL raw_storage
Chris@16: {
Chris@16: public:
Chris@16:    typedef std::size_t           size_type;
Chris@16:    typedef unsigned char*        pointer;
Chris@16: private:
Chris@16:    pointer last, start, end;
Chris@16: public:
Chris@16: 
Chris@16:    raw_storage();
Chris@16:    raw_storage(size_type n);
Chris@16: 
Chris@16:    ~raw_storage()
Chris@16:    {
Chris@16:       ::operator delete(start);
Chris@16:    }
Chris@16: 
Chris@16:    void BOOST_REGEX_CALL resize(size_type n);
Chris@16:    
Chris@16:    void* BOOST_REGEX_CALL extend(size_type n)
Chris@16:    {
Chris@16:       if(size_type(last - end) < n)
Chris@16:          resize(n + (end - start));
Chris@101:       pointer result = end;
Chris@16:       end += n;
Chris@16:       return result;
Chris@16:    }
Chris@16: 
Chris@16:    void* BOOST_REGEX_CALL insert(size_type pos, size_type n);
Chris@16: 
Chris@16:    size_type BOOST_REGEX_CALL size()
Chris@16:    {
Chris@16:       return end - start;
Chris@16:    }
Chris@16: 
Chris@16:    size_type BOOST_REGEX_CALL capacity()
Chris@16:    {
Chris@16:       return last - start;
Chris@16:    }
Chris@16: 
Chris@16:    void* BOOST_REGEX_CALL data()const
Chris@16:    {
Chris@16:       return start;
Chris@16:    }
Chris@16: 
Chris@16:    size_type BOOST_REGEX_CALL index(void* ptr)
Chris@16:    {
Chris@16:       return static_cast<pointer>(ptr) - static_cast<pointer>(data());
Chris@16:    }
Chris@16: 
Chris@16:    void BOOST_REGEX_CALL clear()
Chris@16:    {
Chris@16:       end = start;
Chris@16:    }
Chris@16: 
Chris@16:    void BOOST_REGEX_CALL align()
Chris@16:    {
Chris@16:       // move end up to a boundary:
Chris@16:       end = start + (((end - start) + padding_mask) & ~padding_mask);
Chris@16:    }
Chris@16:    void swap(raw_storage& that)
Chris@16:    {
Chris@16:       std::swap(start, that.start);
Chris@16:       std::swap(end, that.end);
Chris@16:       std::swap(last, that.last);
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: inline raw_storage::raw_storage()
Chris@16: {
Chris@16:    last = start = end = 0;
Chris@16: }
Chris@16: 
Chris@16: inline raw_storage::raw_storage(size_type n)
Chris@16: {
Chris@16:    start = end = static_cast<pointer>(::operator new(n));
Chris@16:    BOOST_REGEX_NOEH_ASSERT(start)
Chris@16:    last = start + n;
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: #ifdef BOOST_MSVC
Chris@16: #pragma warning(push)
Chris@16: #pragma warning(disable: 4103)
Chris@16: #endif
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #  include BOOST_ABI_SUFFIX
Chris@16: #endif
Chris@16: #ifdef BOOST_MSVC
Chris@16: #pragma warning(pop)
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace re_detail
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: