/*=============================================================================
    Boost.Wave: A Standard compliant C++ preprocessor library

    Definition of the predefined macros
    
    http://www.boost.org/

    Copyright (c) 2001-2011 Hartmut Kaiser. Distributed under the Boost
    Software License, Version 1.0. (See accompanying file
    LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/

#if !defined(CPP_MACROMAP_PREDEF_HPP_HK041119)
#define CPP_MACROMAP_PREDEF_HPP_HK041119

#include <cstdio>
#include <boost/assert.hpp>

#include <boost/wave/wave_config.hpp>
#include <boost/wave/wave_config_constant.hpp>
#include <boost/wave/token_ids.hpp>
#include <boost/wave/util/time_conversion_helper.hpp> // time_conversion_helper 

// this must occur after all of the includes and before any code appears
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_PREFIX
#endif

///////////////////////////////////////////////////////////////////////////////
//
// This file contains the definition of functions needed for the management
// of static and dynamic predefined macros, such as __DATE__, __TIME__ etc.
//
// Note: __FILE__, __LINE__ and __INCLUDE_LEVEL__ are handled in the file
//       cpp_macromap.hpp.
//
///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////
namespace boost {
namespace wave {
namespace util {

    ///////////////////////////////////////////////////////////////////////////
    class predefined_macros 
    {
        typedef BOOST_WAVE_STRINGTYPE string_type;
        
    public:
    // list of static predefined macros
        struct static_macros {
            char const *name;
            boost::wave::token_id token_id;
            char const *value;
        };

    // list of dynamic predefined macros
        struct dynamic_macros {
            char const *name;
            boost::wave::token_id token_id;
            string_type (predefined_macros:: *generator)() const;
        };

    private:
        boost::wave::util::time_conversion_helper compilation_time_;
        string_type datestr_;     // __DATE__
        string_type timestr_;     // __TIME__
        string_type version_;     // __SPIRIT_PP_VERSION__/__WAVE_VERSION__
        string_type versionstr_;  // __SPIRIT_PP_VERSION_STR__/__WAVE_VERSION_STR__

    protected:
        void reset_datestr()
        {
        static const char *const monthnames[] = {
                "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
            };

        // for some systems sprintf, time_t etc. is in namespace std
            using namespace std;

        time_t tt = time(0);
        struct tm *tb = 0;

            if (tt != (time_t)-1) {
            char buffer[sizeof("\"Oct 11 1347\"")+1];

                tb = localtime (&tt);
                sprintf (buffer, "\"%s %2d %4d\"",
                    monthnames[tb->tm_mon], tb->tm_mday, tb->tm_year + 1900);
                datestr_ = buffer;
            }
            else {
                datestr_ = "\"??? ?? ????\"";
            }
        }

        void reset_timestr()
        {
        // for some systems sprintf, time_t etc. is in namespace std
            using namespace std;

        time_t tt = time(0);
        struct tm *tb = 0;

            if (tt != (time_t)-1) {
            char buffer[sizeof("\"12:34:56\"")+1];

                tb = localtime (&tt);
                sprintf (buffer, "\"%02d:%02d:%02d\"", tb->tm_hour, 
                    tb->tm_min, tb->tm_sec);
                timestr_ = buffer;
            }
            else {
                timestr_ = "\"??:??:??\"";
            }
        }

        void reset_version()
        {
        char buffer[sizeof("0x00000000")+1];

        // for some systems sprintf, time_t etc. is in namespace std
            using namespace std;

        // calculate the number of days since Dec 13 2001 
        // (the day the Wave project was started)
        tm first_day;

            using namespace std;    // for some systems memset is in namespace std
            memset (&first_day, 0, sizeof(tm));
            first_day.tm_mon = 11;           // Dec
            first_day.tm_mday = 13;          // 13
            first_day.tm_year = 101;         // 2001

        long seconds = long(difftime(compilation_time_.get_time(), mktime(&first_day)));

            sprintf(buffer, "0x%02d%1d%1d%04ld", BOOST_WAVE_VERSION_MAJOR,
                 BOOST_WAVE_VERSION_MINOR, BOOST_WAVE_VERSION_SUBMINOR, 
                 seconds/(3600*24));
            version_ = buffer;
        }

        void reset_versionstr()
        {
        char buffer[sizeof("\"00.00.00.0000 \"")+sizeof(BOOST_PLATFORM)+sizeof(BOOST_COMPILER)+4];

        // for some systems sprintf, time_t etc. is in namespace std
            using namespace std;

        // calculate the number of days since Dec 13 2001 
        // (the day the Wave project was started)
        tm first_day;

            memset (&first_day, 0, sizeof(tm));
            first_day.tm_mon = 11;           // Dec
            first_day.tm_mday = 13;          // 13
            first_day.tm_year = 101;         // 2001

        long seconds = long(difftime(compilation_time_.get_time(), mktime(&first_day)));

            sprintf(buffer, "\"%d.%d.%d.%ld [%s/%s]\"", BOOST_WAVE_VERSION_MAJOR,
                 BOOST_WAVE_VERSION_MINOR, BOOST_WAVE_VERSION_SUBMINOR, 
                 seconds/(3600*24), BOOST_PLATFORM, BOOST_COMPILER);
            versionstr_ = buffer;
        }

    // dynamic predefined macros
        string_type get_date() const { return datestr_; }     // __DATE__ 
        string_type get_time() const { return timestr_; }     // __TIME__

    // __SPIRIT_PP__/__WAVE__
        string_type get_version() const
        {
            char buffer[sizeof("0x0000")+1];

            using namespace std;    // for some systems sprintf is in namespace std
            sprintf(buffer, "0x%02d%1d%1d", BOOST_WAVE_VERSION_MAJOR, 
                BOOST_WAVE_VERSION_MINOR, BOOST_WAVE_VERSION_SUBMINOR);
            return buffer;
        }

    // __WAVE_CONFIG__
        string_type get_config() const
        {
            char buffer[sizeof("0x00000000")+1];

            using namespace std;     // for some systems sprintf is in namespace std
            sprintf(buffer, "0x%08x", BOOST_WAVE_CONFIG);
            return buffer;
        }

    public:
        predefined_macros() 
          : compilation_time_(__DATE__ " " __TIME__)
        { 
            reset(); 
            reset_version();
            reset_versionstr();
        }

        void reset()
        {
            reset_datestr();
            reset_timestr();
        }

    // __SPIRIT_PP_VERSION__/__WAVE_VERSION__
        string_type get_fullversion() const { return version_; }

    // __SPIRIT_PP_VERSION_STR__/__WAVE_VERSION_STR__
        string_type get_versionstr() const { return versionstr_; }

    // C++ mode 
        static_macros const& static_data_cpp(std::size_t i) const
        {
        static static_macros data[] = {
                { "__STDC__", T_INTLIT, "1" },
                { "__cplusplus", T_INTLIT, "199711L" },
                { 0, T_EOF, 0 }
            }; 
            BOOST_ASSERT(i < sizeof(data)/sizeof(data[0]));
            return data[i];
        }

#if BOOST_WAVE_SUPPORT_CPP0X != 0
    // C++0x mode 
        static_macros const& static_data_cpp0x(std::size_t i) const
        {
        static static_macros data[] = {
                { "__STDC__", T_INTLIT, "1" },
                { "__cplusplus", T_INTLIT, "201103L" },
                { "__STDC_VERSION__", T_INTLIT, "199901L" },
                { "__STDC_HOSTED__", T_INTLIT, "0" },
                { "__WAVE_HAS_VARIADICS__", T_INTLIT, "1" },
                { 0, T_EOF, 0 }
            }; 
            BOOST_ASSERT(i < sizeof(data)/sizeof(data[0]));
            return data[i];
        }
#endif

#if BOOST_WAVE_SUPPORT_VARIADICS_PLACEMARKERS != 0
    // C99 mode
        static_macros const& static_data_c99(std::size_t i) const
        {
        static static_macros data[] = {
                { "__STDC__", T_INTLIT, "1" },
                { "__STDC_VERSION__", T_INTLIT, "199901L" },
                { "__STDC_HOSTED__", T_INTLIT, "0" },
                { "__WAVE_HAS_VARIADICS__", T_INTLIT, "1" },
                { 0, T_EOF, 0 }
            }; 
            BOOST_ASSERT(i < sizeof(data)/sizeof(data[0]));
            return data[i];
        }
#endif 

        dynamic_macros const& dynamic_data(std::size_t i) const
        {
        static dynamic_macros data[] = {
                { "__DATE__", T_STRINGLIT, &predefined_macros::get_date },
                { "__TIME__", T_STRINGLIT, &predefined_macros::get_time },
                { "__SPIRIT_PP__", T_INTLIT, &predefined_macros::get_version },
                { "__SPIRIT_PP_VERSION__", T_INTLIT, &predefined_macros::get_fullversion },
                { "__SPIRIT_PP_VERSION_STR__", T_STRINGLIT, &predefined_macros::get_versionstr },
                { "__WAVE__", T_INTLIT, &predefined_macros::get_version },
                { "__WAVE_VERSION__", T_INTLIT, &predefined_macros::get_fullversion },
                { "__WAVE_VERSION_STR__", T_STRINGLIT, &predefined_macros::get_versionstr },
                { "__WAVE_CONFIG__", T_INTLIT, &predefined_macros::get_config },
                { 0, T_EOF, 0 }
            };
            BOOST_ASSERT(i < sizeof(data)/sizeof(data[0]));
            return data[i];
        }
    };   // predefined_macros

///////////////////////////////////////////////////////////////////////////////
}   // namespace util
}   // namespace wave
}   // namespace boost

// the suffix header occurs after all of the code
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_SUFFIX
#endif

#endif // !defined(CPP_MACROMAP_PREDEF_HPP_HK041119)
