Add "cajun" for JSON reading and writing, Save searching in client and some more stuff for searcg

1 files changed, 148 insertions, 0 deletions

diff --git a/src/cajun/reader.h b/src/cajun/reader.h
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+/******************************************************************************
+
+Copyright (c) 2009-2010, Terry Caton
+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 projecct 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 OR CONTRIBUTORS 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 "elements.h"
+#include <iostream>
+#include <vector>
+
+namespace json
+{
+
+class Reader
+{
+public:
+   // this structure will be reported in one of the exceptions defined below
+   struct Location
+   {
+      Location();
+
+      unsigned int m_nLine;       // document line, zero-indexed
+      unsigned int m_nLineOffset; // character offset from beginning of line, zero indexed
+      unsigned int m_nDocOffset;  // character offset from entire document, zero indexed
+   };
+
+   // thrown during the first phase of reading. generally catches low-level problems such
+   //  as errant characters or corrupt/incomplete documents
+   class ScanException : public Exception
+   {
+   public:
+      ScanException(const std::string& sMessage, const Reader::Location& locError) :
+         Exception(sMessage),
+         m_locError(locError) {}
+
+      Reader::Location m_locError;
+   };
+
+   // thrown during the second phase of reading. generally catches higher-level problems such
+   //  as missing commas or brackets
+   class ParseException : public Exception
+   {
+   public:
+      ParseException(const std::string& sMessage, const Reader::Location& locTokenBegin, const Reader::Location& locTokenEnd) :
+         Exception(sMessage),
+         m_locTokenBegin(locTokenBegin),
+         m_locTokenEnd(locTokenEnd) {}
+
+      Reader::Location m_locTokenBegin;
+      Reader::Location m_locTokenEnd;
+   };
+
+
+   // if you know what the document looks like, call one of these...
+   static void Read(Object& object, std::istream& istr);
+   static void Read(Array& array, std::istream& istr);
+   static void Read(String& string, std::istream& istr);
+   static void Read(Number& number, std::istream& istr);
+   static void Read(Boolean& boolean, std::istream& istr);
+   static void Read(Null& null, std::istream& istr);
+
+   // ...otherwise, if you don't know, call this & visit it
+   static void Read(UnknownElement& elementRoot, std::istream& istr);
+
+private:
+   struct Token
+   {
+      enum Type
+      {
+         TOKEN_OBJECT_BEGIN,  //    {
+         TOKEN_OBJECT_END,    //    }
+         TOKEN_ARRAY_BEGIN,   //    [
+         TOKEN_ARRAY_END,     //    ]
+         TOKEN_NEXT_ELEMENT,  //    ,
+         TOKEN_MEMBER_ASSIGN, //    :
+         TOKEN_STRING,        //    "xxx"
+         TOKEN_NUMBER,        //    [+/-]000.000[e[+/-]000]
+         TOKEN_BOOLEAN,       //    true -or- false
+         TOKEN_NULL,          //    null
+      };
+
+      Type nType;
+      std::string sValue;
+
+      // for malformed file debugging
+      Reader::Location locBegin;
+      Reader::Location locEnd;
+   };
+
+   class InputStream;
+   class TokenStream;
+   typedef std::vector<Token> Tokens;
+
+   template <typename ElementTypeT>   
+   static void Read_i(ElementTypeT& element, std::istream& istr);
+
+   // scanning istream into token sequence
+   void Scan(Tokens& tokens, InputStream& inputStream);
+
+   void EatWhiteSpace(InputStream& inputStream);
+   std::string MatchString(InputStream& inputStream);
+   std::string MatchNumber(InputStream& inputStream);
+   std::string MatchExpectedString(InputStream& inputStream, const std::string& sExpected);
+
+   // parsing token sequence into element structure
+   void Parse(UnknownElement& element, TokenStream& tokenStream);
+   void Parse(Object& object, TokenStream& tokenStream);
+   void Parse(Array& array, TokenStream& tokenStream);
+   void Parse(String& string, TokenStream& tokenStream);
+   void Parse(Number& number, TokenStream& tokenStream);
+   void Parse(Boolean& boolean, TokenStream& tokenStream);
+   void Parse(Null& null, TokenStream& tokenStream);
+
+   const std::string& MatchExpectedToken(Token::Type nExpected, TokenStream& tokenStream);
+};
+
+
+} // End namespace
+
+
+#include "reader.inl"
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