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379 lines
15 KiB
C
379 lines
15 KiB
C
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// 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 "parserse_base_utils.h"
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#include "file_io_utils.h"
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namespace epee
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{
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using namespace misc_utils::parse;
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namespace serialization
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{
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namespace json
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{
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#define CHECK_ISSPACE() if(!isspace(*it)){ ASSERT_MES_AND_THROW("Wrong JSON character at: " << std::string(it, buf_end));}
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/*inline void parse_error()
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{
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ASSERT_MES_AND_THROW("json parse error");
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}*/
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template<class t_storage>
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inline void run_handler(typename t_storage::hsection current_section, std::string::const_iterator& sec_buf_begin, std::string::const_iterator buf_end, t_storage& stg)
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{
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std::string::const_iterator sub_element_start;
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std::string name;
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typename t_storage::harray h_array = nullptr;
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enum match_state
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{
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match_state_lookup_for_section_start,
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match_state_lookup_for_name,
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match_state_waiting_separator,
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match_state_wonder_after_separator,
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match_state_wonder_after_value,
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match_state_wonder_array,
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match_state_array_after_value,
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match_state_array_waiting_value,
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match_state_error
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};
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enum array_mode
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{
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array_mode_undifined = 0,
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array_mode_sections,
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array_mode_string,
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array_mode_numbers,
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array_mode_booleans
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};
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match_state state = match_state_lookup_for_section_start;
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array_mode array_md = array_mode_undifined;
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std::string::const_iterator it = sec_buf_begin;
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for(;it != buf_end;it++)
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{
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switch (state)
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{
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case match_state_lookup_for_section_start:
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if(*it == '{')
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state = match_state_lookup_for_name;
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else CHECK_ISSPACE();
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break;
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case match_state_lookup_for_name:
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switch(*it)
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{
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case '"':
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match_string2(it, buf_end, name);
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state = match_state_waiting_separator;
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break;
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case '}':
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//this is it! section ends here.
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//seems that it is empty section
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sec_buf_begin = it;
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return;
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default:
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CHECK_ISSPACE();
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}
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break;
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case match_state_waiting_separator:
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if(*it == ':')
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state = match_state_wonder_after_separator;
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else CHECK_ISSPACE();
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break;
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case match_state_wonder_after_separator:
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if(*it == '"')
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{//just a named string value started
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std::string val;
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match_string2(it, buf_end, val);
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//insert text value
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stg.set_value(name, val, current_section);
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state = match_state_wonder_after_value;
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}else if (isdigit(*it) || *it == '-')
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{//just a named number value started
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std::string val;
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bool is_v_float = false;bool is_signed = false;
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match_number2(it, buf_end, val, is_v_float, is_signed);
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if(!is_v_float)
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{
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if(is_signed)
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{
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int64_t nval = boost::lexical_cast<int64_t>(val);
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stg.set_value(name, nval, current_section);
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}else
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{
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uint64_t nval = boost::lexical_cast<uint64_t >(val);
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stg.set_value(name, nval, current_section);
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}
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}else
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{
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double nval = boost::lexical_cast<double>(val);
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stg.set_value(name, nval, current_section);
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}
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state = match_state_wonder_after_value;
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}else if(isalpha(*it) )
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{// could be null, true or false
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std::string word;
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match_word2(it, buf_end, word);
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if(boost::iequals(word, "null"))
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{
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state = match_state_wonder_after_value;
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//just skip this,
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}else if(boost::iequals(word, "true"))
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{
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stg.set_value(name, true, current_section);
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state = match_state_wonder_after_value;
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}else if(boost::iequals(word, "false"))
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{
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stg.set_value(name, false, current_section);
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state = match_state_wonder_after_value;
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}else ASSERT_MES_AND_THROW("Unknown value keyword " << word);
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}else if(*it == '{')
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{
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//sub section here
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typename t_storage::hsection new_sec = stg.open_section(name, current_section, true);
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CHECK_AND_ASSERT_THROW_MES(new_sec, "Failed to insert new section in json: " << std::string(it, buf_end));
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run_handler(new_sec, it, buf_end, stg);
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state = match_state_wonder_after_value;
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}else if(*it == '[')
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{//array of something
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state = match_state_wonder_array;
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}else CHECK_ISSPACE();
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break;
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case match_state_wonder_after_value:
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if(*it == ',')
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state = match_state_lookup_for_name;
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else if(*it == '}')
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{
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//this is it! section ends here.
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sec_buf_begin = it;
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return;
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}else CHECK_ISSPACE();
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break;
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case match_state_wonder_array:
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if(*it == '[')
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{
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ASSERT_MES_AND_THROW("array of array not suppoerted yet :( sorry");
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//mean array of array
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}
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if(*it == '{')
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{
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//mean array of sections
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typename t_storage::hsection new_sec = nullptr;
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h_array = stg.insert_first_section(name, new_sec, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array&&new_sec, "failed to create new section");
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run_handler(new_sec, it, buf_end, stg);
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state = match_state_array_after_value;
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array_md = array_mode_sections;
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}else if(*it == '"')
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{
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//mean array of strings
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std::string val;
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match_string2(it, buf_end, val);
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h_array = stg.insert_first_value(name, val, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array, " failed to insert values entry");
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state = match_state_array_after_value;
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array_md = array_mode_string;
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}else if (isdigit(*it) || *it == '-')
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{//array of numbers value started
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std::string val;
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bool is_v_float = false;bool is_signed_val = false;
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match_number2(it, buf_end, val, is_v_float, is_signed_val);
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if(!is_v_float)
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{
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int64_t nval = boost::lexical_cast<int64_t>(val);//bool res = string_tools::string_to_num_fast(val, nval);
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h_array = stg.insert_first_value(name, nval, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array, " failed to insert values section entry");
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}else
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{
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double nval = boost::lexical_cast<double>(val);//bool res = string_tools::string_to_num_fast(val, nval);
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h_array = stg.insert_first_value(name, nval, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array, " failed to insert values section entry");
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}
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state = match_state_array_after_value;
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array_md = array_mode_numbers;
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}else if(*it == ']')//empty array
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{
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array_md = array_mode_undifined;
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state = match_state_wonder_after_value;
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}else if(isalpha(*it) )
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{// array of booleans
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std::string word;
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match_word2(it, buf_end, word);
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if(boost::iequals(word, "true"))
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{
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h_array = stg.insert_first_value(name, true, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array, " failed to insert values section entry");
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state = match_state_array_after_value;
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array_md = array_mode_booleans;
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}else if(boost::iequals(word, "false"))
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{
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h_array = stg.insert_first_value(name, false, current_section);
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CHECK_AND_ASSERT_THROW_MES(h_array, " failed to insert values section entry");
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state = match_state_array_after_value;
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array_md = array_mode_booleans;
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}else ASSERT_MES_AND_THROW("Unknown value keyword " << word)
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}else CHECK_ISSPACE();
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break;
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case match_state_array_after_value:
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if(*it == ',')
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state = match_state_array_waiting_value;
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else if(*it == ']')
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{
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h_array = nullptr;
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array_md = array_mode_undifined;
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state = match_state_wonder_after_value;
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}else CHECK_ISSPACE();
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break;
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case match_state_array_waiting_value:
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switch(array_md)
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{
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case array_mode_sections:
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if(*it == '{')
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{
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typename t_storage::hsection new_sec = NULL;
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bool res = stg.insert_next_section(h_array, new_sec);
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CHECK_AND_ASSERT_THROW_MES(res&&new_sec, "failed to insert next section");
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run_handler(new_sec, it, buf_end, stg);
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state = match_state_array_after_value;
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}else CHECK_ISSPACE();
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break;
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case array_mode_string:
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if(*it == '"')
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{
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std::string val;
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match_string2(it, buf_end, val);
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bool res = stg.insert_next_value(h_array, val);
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CHECK_AND_ASSERT_THROW_MES(res, "failed to insert values");
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state = match_state_array_after_value;
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}else CHECK_ISSPACE();
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break;
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case array_mode_numbers:
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if (isdigit(*it) || *it == '-')
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{//array of numbers value started
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std::string val;
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bool is_v_float = false;bool is_signed_val = false;
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match_number2(it, buf_end, val, is_v_float, is_signed_val);
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bool insert_res = false;
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if(!is_v_float)
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{
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boost::int64_t nval = boost::lexical_cast<int64_t>(val); //bool res = string_tools::string_to_num_fast(val, nval);
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insert_res = stg.insert_next_value(h_array, nval);
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}else
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{
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//TODO: optimize here if need
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double nval = boost::lexical_cast<double>(val); //string_tools::string_to_num_fast(val, nval);
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insert_res = stg.insert_next_value(h_array, nval);
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}
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CHECK_AND_ASSERT_THROW_MES(insert_res, "Failed to insert next value");
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state = match_state_array_after_value;
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array_md = array_mode_numbers;
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}else CHECK_ISSPACE();
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break;
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case array_mode_booleans:
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if(isalpha(*it) )
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{// array of booleans
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std::string word;
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match_word2(it, buf_end, word);
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if(boost::iequals(word, "true"))
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{
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bool r = stg.insert_next_value(h_array, true);
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CHECK_AND_ASSERT_THROW_MES(r, " failed to insert values section entry");
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state = match_state_array_after_value;
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}else if(boost::iequals(word, "false"))
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{
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bool r = stg.insert_next_value(h_array, false);
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CHECK_AND_ASSERT_THROW_MES(r, " failed to insert values section entry");
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state = match_state_array_after_value;
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}
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else ASSERT_MES_AND_THROW("Unknown value keyword " << word);
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}else CHECK_ISSPACE();
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break;
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case array_mode_undifined:
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default:
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ASSERT_MES_AND_THROW("Bad array state");
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}
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break;
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case match_state_error:
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default:
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ASSERT_MES_AND_THROW("WRONG JSON STATE");
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}
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}
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}
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/*
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{
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"firstName": "John",
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"lastName": "Smith",
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"age": 25,
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"address": {
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"streetAddress": "21 2nd Street",
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"city": "New York",
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"state": "NY",
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"postalCode": -10021,
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"have_boobs": true,
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"have_balls": false
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},
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"phoneNumber": [
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{
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"type": "home",
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"number": "212 555-1234"
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},
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{
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"type": "fax",
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"number": "646 555-4567"
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}
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],
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"phoneNumbers": [
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"812 123-1234",
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"916 123-4567"
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]
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}
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*/
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template<class t_storage>
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inline bool load_from_json(const std::string& buff_json, t_storage& stg)
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{
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std::string::const_iterator sec_buf_begin = buff_json.begin();
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try
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{
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run_handler(nullptr, sec_buf_begin, buff_json.end(), stg);
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return true;
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}
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catch(const std::exception& ex)
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{
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LOG_PRINT_RED_L0("Failed to parse json, what: " << ex.what());
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return false;
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}
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catch(...)
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{
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LOG_PRINT_RED_L0("Failed to parse json");
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return false;
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}
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}
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}
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}
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}
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