Load user information from preferences, fps display for testing

1 files changed, 403 insertions, 0 deletions

diff --git a/src/cajun/elements.cpp b/src/cajun/elements.cpp
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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.
+
+******************************************************************************/
+
+#include <cassert>
+#include <algorithm>
+#include <map>
+#include "visitor.h"
+#include "reader.h"
+
+/*  
+
+TODO:
+* better documentation
+
+*/
+
+namespace json
+{
+
+
+inline Exception::Exception(const std::string& sMessage) :
+   std::runtime_error(sMessage) {}
+
+
+/////////////////////////
+// UnknownElement members
+
+class UnknownElement::Imp
+{
+public:
+   virtual ~Imp() {}
+   virtual Imp* Clone() const = 0;
+
+   virtual bool Compare(const Imp& imp) const = 0;
+
+   virtual void Accept(ConstVisitor& visitor) const = 0;
+   virtual void Accept(Visitor& visitor) = 0;
+};
+
+
+template <typename ElementTypeT>
+class UnknownElement::Imp_T : public UnknownElement::Imp
+{
+public:
+   Imp_T(const ElementTypeT& element) : m_Element(element) {}
+   virtual Imp* Clone() const { return new Imp_T<ElementTypeT>(*this); }
+
+   virtual void Accept(ConstVisitor& visitor) const { visitor.Visit(m_Element); }
+   virtual void Accept(Visitor& visitor) { visitor.Visit(m_Element); }
+
+   virtual bool Compare(const Imp& imp) const
+   {
+      ConstCastVisitor_T<ElementTypeT> castVisitor;
+      imp.Accept(castVisitor);
+      return castVisitor.m_pElement &&
+             m_Element == *castVisitor.m_pElement;
+   }
+
+private:
+   ElementTypeT m_Element;
+};
+
+
+class UnknownElement::ConstCastVisitor : public ConstVisitor
+{
+   virtual void Visit(const Array& array) {}
+   virtual void Visit(const Object& object) {}
+   virtual void Visit(const Number& number) {}
+   virtual void Visit(const String& string) {}
+   virtual void Visit(const Boolean& boolean) {}
+   virtual void Visit(const Null& null) {}
+};
+
+template <typename ElementTypeT>
+class UnknownElement::ConstCastVisitor_T : public ConstCastVisitor
+{
+public:
+   ConstCastVisitor_T() : m_pElement(0) {}
+   virtual void Visit(const ElementTypeT& element) { m_pElement = &element; } // we don't know what this is, but it overrides one of the base's no-op functions
+   const ElementTypeT* m_pElement;
+};
+
+
+class UnknownElement::CastVisitor : public Visitor
+{
+   virtual void Visit(Array& array) {}
+   virtual void Visit(Object& object) {}
+   virtual void Visit(Number& number) {}
+   virtual void Visit(String& string) {}
+   virtual void Visit(Boolean& boolean) {}
+   virtual void Visit(Null& null) {}
+};
+
+template <typename ElementTypeT>
+class UnknownElement::CastVisitor_T : public CastVisitor
+{
+public:
+   CastVisitor_T() : m_pElement(0) {}
+   virtual void Visit(ElementTypeT& element) { m_pElement = &element; } // we don't know what this is, but it overrides one of the base's no-op functions
+   ElementTypeT* m_pElement;
+};
+
+
+
+
+inline UnknownElement::UnknownElement() :                               m_pImp( new Imp_T<Null>( Null() ) ) {}
+inline UnknownElement::UnknownElement(const UnknownElement& unknown) :  m_pImp( unknown.m_pImp->Clone()) {}
+inline UnknownElement::UnknownElement(const Object& object) :           m_pImp( new Imp_T<Object>(object) ) {}
+inline UnknownElement::UnknownElement(const Array& array) :             m_pImp( new Imp_T<Array>(array) ) {}
+inline UnknownElement::UnknownElement(const Number& number) :           m_pImp( new Imp_T<Number>(number) ) {}
+inline UnknownElement::UnknownElement(const Boolean& boolean) :         m_pImp( new Imp_T<Boolean>(boolean) ) {}
+inline UnknownElement::UnknownElement(const String& string) :           m_pImp( new Imp_T<String>(string) ) {}
+inline UnknownElement::UnknownElement(const Null& null) :               m_pImp( new Imp_T<Null>(null) ) {}
+
+inline UnknownElement::~UnknownElement()   { delete m_pImp; }
+
+inline UnknownElement::operator const Object& () const    { return CastTo<Object>(); }
+inline UnknownElement::operator const Array& () const     { return CastTo<Array>(); }
+inline UnknownElement::operator const Number& () const    { return CastTo<Number>(); }
+inline UnknownElement::operator const Boolean& () const   { return CastTo<Boolean>(); }
+inline UnknownElement::operator const String& () const    { return CastTo<String>(); }
+inline UnknownElement::operator const Null& () const      { return CastTo<Null>(); }
+
+inline UnknownElement::operator Object& ()    { return ConvertTo<Object>(); }
+inline UnknownElement::operator Array& ()     { return ConvertTo<Array>(); }
+inline UnknownElement::operator Number& ()    { return ConvertTo<Number>(); }
+inline UnknownElement::operator Boolean& ()   { return ConvertTo<Boolean>(); }
+inline UnknownElement::operator String& ()    { return ConvertTo<String>(); }
+inline UnknownElement::operator Null& ()      { return ConvertTo<Null>(); }
+
+inline UnknownElement& UnknownElement::operator = (const UnknownElement& unknown) 
+{
+   // always check for this
+   if (&unknown != this)
+   {
+      // we might be copying from a subtree of ourselves. delete the old imp
+      //  only after the clone operation is complete. yes, this could be made 
+      //  more efficient, but isn't worth the complexity
+      Imp* pOldImp = m_pImp;
+      m_pImp = unknown.m_pImp->Clone();
+      delete pOldImp;
+   }
+
+   return *this;
+}
+
+inline UnknownElement& UnknownElement::operator[] (const std::string& key)
+{
+   // the people want an object. make us one if we aren't already
+   Object& object = ConvertTo<Object>();
+   return object[key];
+}
+
+inline const UnknownElement& UnknownElement::operator[] (const std::string& key) const
+{
+   // throws if we aren't an object
+   const Object& object = CastTo<Object>();
+   return object[key];
+}
+
+inline UnknownElement& UnknownElement::operator[] (size_t index)
+{
+   // the people want an array. make us one if we aren't already
+   Array& array = ConvertTo<Array>();
+   return array[index];
+}
+
+inline const UnknownElement& UnknownElement::operator[] (size_t index) const
+{
+   // throws if we aren't an array
+   const Array& array = CastTo<Array>();
+   return array[index];
+}
+
+
+template <typename ElementTypeT>
+const ElementTypeT& UnknownElement::CastTo() const
+{
+   ConstCastVisitor_T<ElementTypeT> castVisitor;
+   m_pImp->Accept(castVisitor);
+   if (castVisitor.m_pElement == 0)
+      throw Exception("Bad cast");
+   return *castVisitor.m_pElement;
+}
+
+
+
+template <typename ElementTypeT>
+ElementTypeT& UnknownElement::ConvertTo() 
+{
+   CastVisitor_T<ElementTypeT> castVisitor;
+   m_pImp->Accept(castVisitor);
+   if (castVisitor.m_pElement == 0)
+   {
+      // we're not the right type. fix it & try again
+      *this = ElementTypeT();
+      m_pImp->Accept(castVisitor);
+   }
+
+   return *castVisitor.m_pElement;
+}
+
+
+inline void UnknownElement::Accept(ConstVisitor& visitor) const { m_pImp->Accept(visitor); }
+inline void UnknownElement::Accept(Visitor& visitor)            { m_pImp->Accept(visitor); }
+
+
+inline bool UnknownElement::operator == (const UnknownElement& element) const
+{
+   return m_pImp->Compare(*element.m_pImp);
+}
+
+
+
+//////////////////
+// Object members
+
+
+inline Object::Member::Member(const std::string& nameIn, const UnknownElement& elementIn) :
+   name(nameIn), element(elementIn) {}
+
+inline bool Object::Member::operator == (const Member& member) const 
+{
+   return name == member.name &&
+          element == member.element;
+}
+
+class Object::Finder : public std::unary_function<Object::Member, bool>
+{
+public:
+   Finder(const std::string& name) : m_name(name) {}
+   bool operator () (const Object::Member& member) {
+      return member.name == m_name;
+   }
+
+private:
+   std::string m_name;
+};
+
+
+
+inline Object::iterator Object::Begin() { return m_Members.begin(); }
+inline Object::iterator Object::End() { return m_Members.end(); }
+inline Object::const_iterator Object::Begin() const { return m_Members.begin(); }
+inline Object::const_iterator Object::End() const { return m_Members.end(); }
+
+inline size_t Object::Size() const { return m_Members.size(); }
+inline bool Object::Empty() const { return m_Members.empty(); }
+
+inline Object::iterator Object::Find(const std::string& name) 
+{
+   return std::find_if(m_Members.begin(), m_Members.end(), Finder(name));
+}
+
+inline Object::const_iterator Object::Find(const std::string& name) const 
+{
+   return std::find_if(m_Members.begin(), m_Members.end(), Finder(name));
+}
+
+inline Object::iterator Object::Insert(const Member& member)
+{
+   return Insert(member, End());
+}
+
+inline Object::iterator Object::Insert(const Member& member, iterator itWhere)
+{
+   iterator it = Find(member.name);
+   if (it != m_Members.end())
+      throw Exception(std::string("Object member already exists: ") + member.name);
+
+   it = m_Members.insert(itWhere, member);
+   return it;
+}
+
+inline Object::iterator Object::Erase(iterator itWhere) 
+{
+   return m_Members.erase(itWhere);
+}
+
+inline UnknownElement& Object::operator [](const std::string& name)
+{
+
+   iterator it = Find(name);
+   if (it == m_Members.end())
+   {
+      Member member(name);
+      it = Insert(member, End());
+   }
+   return it->element;      
+}
+
+inline const UnknownElement& Object::operator [](const std::string& name) const 
+{
+   const_iterator it = Find(name);
+   if (it == End())
+      throw Exception(std::string("Object member not found: ") + name);
+   return it->element;
+}
+
+inline void Object::Clear() 
+{
+   m_Members.clear(); 
+}
+
+inline bool Object::operator == (const Object& object) const 
+{
+   return m_Members == object.m_Members;
+}
+
+
+/////////////////
+// Array members
+
+inline Array::iterator Array::Begin()  { return m_Elements.begin(); }
+inline Array::iterator Array::End()    { return m_Elements.end(); }
+inline Array::const_iterator Array::Begin() const  { return m_Elements.begin(); }
+inline Array::const_iterator Array::End() const    { return m_Elements.end(); }
+
+inline Array::iterator Array::Insert(const UnknownElement& element, iterator itWhere)
+{ 
+   return m_Elements.insert(itWhere, element);
+}
+
+inline Array::iterator Array::Insert(const UnknownElement& element)
+{
+   return Insert(element, End());
+}
+
+inline Array::iterator Array::Erase(iterator itWhere)
+{ 
+   return m_Elements.erase(itWhere);
+}
+
+inline void Array::Resize(size_t newSize)
+{
+   m_Elements.resize(newSize);
+}
+
+inline size_t Array::Size() const  { return m_Elements.size(); }
+inline bool Array::Empty() const   { return m_Elements.empty(); }
+
+inline UnknownElement& Array::operator[] (size_t index)
+{
+   size_t nMinSize = index + 1; // zero indexed
+   if (m_Elements.size() < nMinSize)
+      m_Elements.resize(nMinSize);
+   return m_Elements[index]; 
+}
+
+inline const UnknownElement& Array::operator[] (size_t index) const 
+{
+   if (index >= m_Elements.size())
+      throw Exception("Array out of bounds");
+   return m_Elements[index]; 
+}
+
+inline void Array::Clear() {
+   m_Elements.clear();
+}
+
+inline bool Array::operator == (const Array& array) const
+{
+   return m_Elements == array.m_Elements;
+}
+
+
+//////////////////
+// Null members
+
+inline bool Null::operator == (const Null& trivial) const
+{
+   return true;
+}
+
+
+
+} // End namespace