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138 lines
4.8 KiB
138 lines
4.8 KiB
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include "levin_base.h"
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#include "serializeble_struct_helper.h"
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namespace epee
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{
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namespace levin
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{
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template<class t_struct>
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bool pack_struct_to_levin_message(const t_struct& t, std::string& buff, int command_id)
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{
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buff.resize(sizeof(levin::bucket_head));
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levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = 0;
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head.m_have_to_return_data = true;
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head.m_command = command_id;
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head.m_return_code = 1;
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head.m_reservedA = rand(); //probably some flags in future
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head.m_reservedB = rand(); //probably some check summ in future
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std::string buff_strg;
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if(!StorageNamed::save_struct_as_storage_to_buff_t<t_struct, StorageNamed::DefaultStorageType>(t, buff_strg))
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return false;
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head.m_cb = buff_strg.size();
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buff.append(buff_strg);
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return true;
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}
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bool pack_data_to_levin_message(const std::string& data, std::string& buff, int command_id)
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{
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buff.resize(sizeof(levin::bucket_head));
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levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = 0;
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head.m_have_to_return_data = true;
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head.m_command = command_id;
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head.m_return_code = 1;
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head.m_reservedA = rand(); //probably some flags in future
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head.m_reservedB = rand(); //probably some check summ in future
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head.m_cb = data.size();
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buff.append(data);
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return true;
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}
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bool load_levin_data_from_levin_message(std::string& levin_data, const std::string& buff, int& command)
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{
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if(buff.size() < sizeof(levin::bucket_head) )
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{
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LOG_PRINT_L3("size of buff(" << buff.size() << ") is too small, at load_struct_from_levin_message");
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return false;
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}
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levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
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if(head.m_signature != LEVIN_SIGNATURE)
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{
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LOG_PRINT_L3("Failed to read signature in levin message, at load_struct_from_levin_message");
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return false;
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}
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if(head.m_cb != buff.size()-sizeof(levin::bucket_head))
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{
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LOG_PRINT_L3("sizes missmatch, at load_struct_from_levin_message");
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return false;
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}
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//std::string buff_strg;
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levin_data.assign(&buff[sizeof(levin::bucket_head)], buff.size()-sizeof(levin::bucket_head));
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command = head.m_command;
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return true;
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}
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template<class t_struct>
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bool load_struct_from_levin_message(t_struct& t, const std::string& buff, int& command)
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{
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if(buff.size() < sizeof(levin::bucket_head) )
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{
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LOG_ERROR("size of buff(" << buff.size() << ") is too small, at load_struct_from_levin_message");
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return false;
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}
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levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
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if(head.m_signature != LEVIN_SIGNATURE)
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{
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LOG_ERROR("Failed to read signature in levin message, at load_struct_from_levin_message");
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return false;
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}
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if(head.m_cb != buff.size()-sizeof(levin::bucket_head))
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{
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LOG_ERROR("sizes missmatch, at load_struct_from_levin_message");
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return false;
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}
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std::string buff_strg;
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buff_strg.assign(&buff[sizeof(levin::bucket_head)], buff.size()-sizeof(levin::bucket_head));
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if(!StorageNamed::load_struct_from_storage_buff_t<t_struct, StorageNamed::DefaultStorageType>(t, buff_strg))
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{
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LOG_ERROR("Failed to read storage, at load_struct_from_levin_message");
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return false;
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}
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command = head.m_command;
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return true;
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}
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}
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}
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