/*
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 *
 */
 /*
    File:       QueryParamList.cpp

    Contains:   Implementation of QueryParamList class 
    
    The QueryParamList class is used to parse and build a searchable list
    of name/value pairs from a RFC1808 QueryString that has been encoded
    using the html 'form encoding' rules.
                    
*/

#ifndef __query_param_list__
#define __query_param_list__


//#include "QueryParamList.h"

#include "PLDoubleLinkedList.h"
#include "StrPtrLen.h"


class QueryParamListElement {

    public:
        QueryParamListElement( char* name, char* value )
        {
            mName   = name;
            mValue  = value;
                        
        }       
        
        virtual ~QueryParamListElement() 
        { 
            delete [] mName;
            delete [] mValue;
        }
        
        char    *mName;
        char    *mValue;

};


class QueryParamList
{
    public:
        QueryParamList( char* queryString );
        QueryParamList( StrPtrLen* querySPL );
        ~QueryParamList() { delete fNameValueQueryParamlist; }
        
        void AddNameValuePairToList( char* name, char* value );
        const char *DoFindCGIValueForParam( char *name );
        void PrintAll( char *idString );
        
    protected:
        void            BulidList( StrPtrLen* querySPL );
        void            DecodeArg( char *ioCodedPtr );
        enum { 
            // escaping states
              kLastWasText
            , kPctEscape
            , kRcvHexDigitOne
        };
        
        Bool16          IsHex( char c );
            
        PLDoubleLinkedList<QueryParamListElement>   *fNameValueQueryParamlist;
    

};





#endif
