text: // Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
  // 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 the Andrey N. Sabelnikov 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  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.
  //
  
  
  
  #pragma once
  
  #include <boost/regex.hpp>
  
  #include "misc_language.h"
  #include "portable_storage_base.h"
  #include "warnings.h"
  
  namespace epee
  {
    namespace serialization
    {
  #define ASSERT_AND_THROW_WRONG_CONVERSION() ASSERT_MES_AND_THROW("WRONG DATA CONVERSION: from type=" << typeid(from).name() << " to type " << typeid(to).name())
  
      template<typename from_type, typename to_type>
      void convert_int_to_uint(const from_type& from, to_type& to)
      {
  PUSH_WARNINGS
  DISABLE_VS_WARNINGS(4018)
        CHECK_AND_ASSERT_THROW_MES(from >=0, "unexpected int value with signed storage value less than 0, and unsigned receiver value");
  DISABLE_GCC_AND_CLANG_WARNING(sign-compare)
        CHECK_AND_ASSERT_THROW_MES(from <= std::numeric_limits<to_type>::max(), "int value overhead: try to set value " << from << " to type " << typeid(to_type).name() << " with max possible value = " << std::numeric_limits<to_type>::max());
        to = static_cast<to_type>(from);
  POP_WARNINGS
      }
      template<typename from_type, typename to_type>
      void convert_int_to_int(const from_type& from, to_type& to)
      {
        CHECK_AND_ASSERT_THROW_MES(from >= boost::numeric::bounds<to_type>::lowest(), "int value overhead: try to set value " << from << " to type " << typeid(to_type).name() << " with lowest possible value = " << boost::numeric::bounds<to_type>::lowest());
  PUSH_WARNINGS
  DISABLE_CLANG_WARNING(tautological-constant-out-of-range-compare)
        CHECK_AND_ASSERT_THROW_MES(from <= std::numeric_limits<to_type>::max(), "int value overhead: try to set value " << from << " to type " << typeid(to_type).name() << " with max possible value = " << std::numeric_limits<to_type>::max());
  POP_WARNINGS
        to = static_cast<to_type>(from);
      }
      template<typename from_type, typename to_type>
      void convert_uint_to_any_int(const from_type& from, to_type& to)
      {
  PUSH_WARNINGS
  DISABLE_VS_WARNINGS(4018)
  DISABLE_CLANG_WARNING(tautological-constant-out-of-range-compare)
          CHECK_AND_ASSERT_THROW_MES(from <= std::numeric_limits<to_type>::max(), "uint value overhead: try to set value " << from << " to type " << typeid(to_type).name() << " with max possible value = " << std::numeric_limits<to_type>::max());
        to = static_cast<to_type>(from);
  POP_WARNINGS
      }
  
      template<typename from_type, typename to_type, bool, bool> //is from signed, is from to signed
      struct convert_to_signed_unsigned;
  
      template<typename from_type, typename to_type>
      struct convert_to_signed_unsigned<from_type, to_type, true, true>
      {
        static void convert(const from_type& from, to_type& to)
        {//from signed to signed
          convert_int_to_int(from, to);
        }
      };
  
      template<typename from_type, typename to_type>
      struct convert_to_signed_unsigned<from_type, to_type, true, false>
      {
        static void convert(const from_type& from, to_type& to)
        {//from signed to unsigned
          convert_int_to_uint(from, to);
        }
      };
  
      template<typename from_type, typename to_type>
      struct convert_to_signed_unsigned<from_type, to_type, false, true>
      {
        static void convert(const from_type& from, to_type& to)
        {//from unsigned to signed
          convert_uint_to_any_int(from, to);
        }
      };
  
      template<typename from_type, typename to_type>
      struct convert_to_signed_unsigned<from_type, to_type, false, false>
      {
        static void convert(const from_type& from, to_type& to)
        {
          //from unsigned to unsigned
          convert_uint_to_any_int(from, to);
        }
      };
  
      template<typename from_type, typename to_type, bool>
      struct convert_to_integral;
  
      template<typename from_type, typename to_type>
      struct convert_to_integral<from_type, to_type, true>
      {
        static void convert(const from_type& from, to_type& to)
        {
          convert_to_signed_unsigned<from_type, to_type, std::is_signed<from_type>::value, std::is_signed<to_type>::value>::convert(from, to);
        }
      };
  
      template<typename from_type, typename to_type>
      struct convert_to_integral<from_type, to_type, false>
      {
        static void convert(const from_type& from, to_type& to)
        {
          ASSERT_AND_THROW_WRONG_CONVERSION();
        }
      };
  
      // For MyMonea/OpenMonea backend compatibility
      // MyMonea backend sends amount, fees and timestamp values as strings.
      // Until MM backend is updated, this is needed for compatibility between OpenMonea and MyMonea. 
      template<>
      struct convert_to_integral<std::string, uint64_t, false>
      {
        static void convert(const std::string& from, uint64_t& to)
        {
          MTRACE("Converting std::string to uint64_t. Source: " << from);
          // String only contains digits
          if(std::all_of(from.begin(), from.end(), ::isdigit))
            to = boost::lexical_cast<uint64_t>(from);
          // MyMonea ISO 8061 timestamp (2017-05-06T16:27:06Z)
          else if (boost::regex_match (from, boost::regex("\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\dZ")))
          {
            // Convert to unix timestamp
            std::tm tm = {};
            std::istringstream ss(from);
            if (ss >> std::get_time(&tm, "%Y-%m-%dT%H:%M:%S"))
              to = std::mktime(&tm);
          } else
            ASSERT_AND_THROW_WRONG_CONVERSION();
        }
      };
  
      template<class from_type, class to_type>
      struct is_convertable: std::integral_constant<bool,
                              std::is_integral<to_type>::value &&
                              std::is_integral<from_type>::value &&
                              !std::is_same<from_type, bool>::value &&
                              !std::is_same<to_type, bool>::value > {};
  
      template<typename from_type, typename to_type, bool>
      struct convert_to_same;
  
      template<typename from_type, typename to_type>
      struct convert_to_same<from_type, to_type, true>
      {
        static void convert(const from_type& from, to_type& to)
        {
          to = from;
        }
      };
  
      template<typename from_type, typename to_type>
      struct convert_to_same<from_type, to_type, false>
      {
        static void convert(const from_type& from, to_type& to)
        {
          convert_to_integral<from_type, to_type, is_convertable<from_type, to_type>::value>::convert(from, to);// ASSERT_AND_THROW_WRONG_CONVERSION();
        }
      };
  
  
      template<class from_type, class to_type>
      void convert_t(const from_type& from, to_type& to)
      {
        convert_to_same<from_type, to_type, std::is_same<to_type, from_type>::value>::convert(from, to);
      }
    }
  }
  