1 /* 2 * Copyright (C) 2011 Tommi Maekitalo 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * As a special exception, you may use this file as part of a free 10 * software library without restriction. Specifically, if other files 11 * instantiate templates or use macros or inline functions from this 12 * file, or you compile this file and link it with other files to 13 * produce an executable, this file does not by itself cause the 14 * resulting executable to be covered by the GNU General Public 15 * License. This exception does not however invalidate any other 16 * reasons why the executable file might be covered by the GNU Library 17 * General Public License. 18 * 19 * This library is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 * Lesser General Public License for more details. 23 * 24 * You should have received a copy of the GNU Lesser General Public 25 * License along with this library; if not, write to the Free Software 26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 27 */ 28 29 #ifndef CXXTOOLS_JSONPARSER_H 30 #define CXXTOOLS_JSONPARSER_H 31 32 #include <cxxtools/api.h> 33 #include <cxxtools/string.h> 34 35 namespace cxxtools 36 { 37 class DeserializerBase; 38 39 class CXXTOOLS_API JsonParser 40 { 41 class JsonStringParser 42 { 43 String _str; 44 unsigned _count; 45 unsigned short _value; 46 47 enum 48 { 49 state_0, 50 state_esc, 51 state_hex 52 } _state; 53 54 public: JsonStringParser()55 JsonStringParser() 56 : _state(state_0) 57 { } 58 59 bool advance(Char ch); 60 clear()61 void clear() 62 { _state = state_0; _str.clear(); } 63 str()64 const String& str() const 65 { return _str; } 66 }; 67 68 public: 69 JsonParser(); 70 begin(DeserializerBase & handler)71 void begin(DeserializerBase& handler) 72 { 73 _state = state_0; 74 _token.clear(); 75 _deserializer = &handler; 76 } 77 78 int advance(Char ch); // 1: end character detected; -1: end but char not consumed; 0: no end 79 void finish(); 80 81 private: 82 enum 83 { 84 state_0, 85 state_object, 86 state_object_name, 87 state_object_after_name, 88 state_object_value, 89 state_object_e, 90 state_object_next_member, 91 state_array, 92 state_array_value, 93 state_array_e, 94 state_string, 95 state_number, 96 state_float, 97 state_token, 98 state_comment0, 99 state_commentline, 100 state_comment, 101 state_comment_e, 102 state_end 103 } _state, _nextState; 104 105 String _token; 106 107 DeserializerBase* _deserializer; 108 JsonStringParser _stringParser; 109 JsonParser* _next; 110 }; 111 } 112 113 #endif // CXXTOOLS_JSONPARSER_H 114