json_value.cpp.svn-base

这是基于jsoncpp项目写扩展功能

                  &&  value_.string_  
                  && strcmp( value_.string_, other.value_.string_ ) < 0 );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
   case objectValue:
      {
         int delta = int( value_.map_->size() - other.value_.map_->size() );
         if ( delta )
            return delta < 0;
         return (*value_.map_) < (*other.value_.map_);
      }
#else
   case arrayValue:
      return value_.array_->compare( *(other.value_.array_) ) < 0;
   case objectValue:
      return value_.map_->compare( *(other.value_.map_) ) < 0;
#endif
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0;  // unreachable
}

bool 
Value::operator <=( const Value &other ) const
{
   return !(other > *this);
}

bool 
Value::operator >=( const Value &other ) const
{
   return !(*this < other);
}

bool 
Value::operator >( const Value &other ) const
{
   return other < *this;
}

bool 
Value::operator ==( const Value &other ) const
{
   //if ( type_ != other.type_ )
   // GCC 2.95.3 says:
   // attempt to take address of bit-field structure member `Json::Value::type_'
   // Beats me, but a temp solves the problem.
   int temp = other.type_;
   if ( type_ != temp )
      return false;
   switch ( type_ )
   {
   case nullValue:
      return true;
   case intValue:
      return value_.int_ == other.value_.int_;
   case uintValue:
      return value_.uint_ == other.value_.uint_;
   case realValue:
      return value_.real_ == other.value_.real_;
   case booleanValue:
      return value_.bool_ == other.value_.bool_;
   case stringValue:
      return ( value_.string_ == other.value_.string_ )
             || ( other.value_.string_  
                  &&  value_.string_  
                  && strcmp( value_.string_, other.value_.string_ ) == 0 );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
   case objectValue:
      return value_.map_->size() == other.value_.map_->size()
             && (*value_.map_) == (*other.value_.map_);
#else
   case arrayValue:
      return value_.array_->compare( *(other.value_.array_) ) == 0;
   case objectValue:
      return value_.map_->compare( *(other.value_.map_) ) == 0;
#endif
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0;  // unreachable
}

bool 
Value::operator !=( const Value &other ) const
{
   return !( *this == other );
}

const char *
Value::asCString() const
{
   JSON_ASSERT( type_ == stringValue );
   return value_.string_;
}


std::string 
Value::asString() const
{
   switch ( type_ )
   {
   case nullValue:
      return "";
   case stringValue:
      return value_.string_ ? value_.string_ : "";
   case booleanValue:
      return value_.bool_ ? "true" : "false";
   case intValue:
   case uintValue:
   case realValue:
   case arrayValue:
   case objectValue:
      JSON_ASSERT_MESSAGE( false, "Type is not convertible to string" );
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return ""; // unreachable
}

# ifdef JSON_USE_CPPTL
CppTL::ConstString 
Value::asConstString() const
{
   return CppTL::ConstString( asString().c_str() );
}
# endif

Value::Int 
Value::asInt() const
{
   switch ( type_ )
   {
   case nullValue:
      return 0;
   case intValue:
      return value_.int_;
   case uintValue:
      JSON_ASSERT_MESSAGE( value_.uint_ < (unsigned)maxInt, "integer out of signed integer range" );
      return value_.uint_;
   case realValue:
      JSON_ASSERT_MESSAGE( value_.real_ >= minInt  &&  value_.real_ <= maxInt, "Real out of signed integer range" );
      return Int( value_.real_ );
   case booleanValue:
      return value_.bool_ ? 1 : 0;
   case stringValue:
   case arrayValue:
   case objectValue:
      JSON_ASSERT_MESSAGE( false, "Type is not convertible to int" );
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0; // unreachable;
}

Value::UInt 
Value::asUInt() const
{
   switch ( type_ )
   {
   case nullValue:
      return 0;
   case intValue:
      JSON_ASSERT_MESSAGE( value_.int_ >= 0, "Negative integer can not be converted to unsigned integer" );
      return value_.int_;
   case uintValue:
      return value_.uint_;
   case realValue:
      JSON_ASSERT_MESSAGE( value_.real_ >= 0  &&  value_.real_ <= maxUInt,  "Real out of unsigned integer range" );
      return UInt( value_.real_ );
   case booleanValue:
      return value_.bool_ ? 1 : 0;
   case stringValue:
   case arrayValue:
   case objectValue:
      JSON_ASSERT_MESSAGE( false, "Type is not convertible to uint" );
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0; // unreachable;
}

double 
Value::asDouble() const
{
   switch ( type_ )
   {
   case nullValue:
      return 0.0;
   case intValue:
      return value_.int_;
   case uintValue:
      return value_.uint_;
   case realValue:
      return value_.real_;
   case booleanValue:
      return value_.bool_ ? 1.0 : 0.0;
   case stringValue:
   case arrayValue:
   case objectValue:
      JSON_ASSERT_MESSAGE( false, "Type is not convertible to double" );
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0; // unreachable;
}

bool 
Value::asBool() const
{
   switch ( type_ )
   {
   case nullValue:
      return false;
   case intValue:
   case uintValue:
      return value_.int_ != 0;
   case realValue:
      return value_.real_ != 0.0;
   case booleanValue:
      return value_.bool_;
   case stringValue:
      return value_.string_  &&  value_.string_[0] != 0;
   case arrayValue:
   case objectValue:
      return value_.map_->size() != 0;
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return false; // unreachable;
}


bool 
Value::isConvertibleTo( ValueType other ) const
{
   switch ( type_ )
   {
   case nullValue:
      return true;
   case intValue:
      return ( other == nullValue  &&  value_.int_ == 0 )
             || other == intValue
             || ( other == uintValue  && value_.int_ >= 0 )
             || other == realValue
             || other == stringValue
             || other == booleanValue;
   case uintValue:
      return ( other == nullValue  &&  value_.uint_ == 0 )
             || ( other == intValue  && value_.uint_ <= (unsigned)maxInt )
             || other == uintValue
             || other == realValue
             || other == stringValue
             || other == booleanValue;
   case realValue:
      return ( other == nullValue  &&  value_.real_ == 0.0 )
             || ( other == intValue  &&  value_.real_ >= minInt  &&  value_.real_ <= maxInt )
             || ( other == uintValue  &&  value_.real_ >= 0  &&  value_.real_ <= maxUInt )
             || other == realValue
             || other == stringValue
             || other == booleanValue;
   case booleanValue:
      return ( other == nullValue  &&  value_.bool_ == false )
             || other == intValue
             || other == uintValue
             || other == realValue
             || other == stringValue
             || other == booleanValue;
   case stringValue:
      return other == stringValue
             || ( other == nullValue  &&  (!value_.string_  ||  value_.string_[0] == 0) );
   case arrayValue:
      return other == arrayValue
             ||  ( other == nullValue  &&  value_.map_->size() == 0 );
   case objectValue:
      return other == objectValue
             ||  ( other == nullValue  &&  value_.map_->size() == 0 );
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return false; // unreachable;
}


/// Number of values in array or object
Value::UInt 
Value::size() const
{
   switch ( type_ )
   {
   case nullValue:
   case intValue:
   case uintValue:
   case realValue:
   case booleanValue:
   case stringValue:
      return 0;
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:  // size of the array is highest index + 1
      if ( !value_.map_->empty() )
      {
         ObjectValues::const_iterator itLast = value_.map_->end();
         --itLast;
         return (*itLast).first.index()+1;
      }
      return 0;
   case objectValue:
      return Int( value_.map_->size() );
#else
   case arrayValue:
      return Int( value_.array_->size() );
   case objectValue:
      return Int( value_.map_->size() );
#endif
   default:
      JSON_ASSERT_UNREACHABLE;
   }
   return 0; // unreachable;
}


bool 
Value::empty() const
{
   if ( isNull() || isArray() || isObject() )
      return size() == 0u;
   else
      return false;
}


bool
Value::operator!() const
{
   return isNull();
}


void 
Value::clear()
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == arrayValue  || type_ == objectValue );

   switch ( type_ )
   {
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
   case objectValue:
      value_.map_->clear();
      break;
#else
   case arrayValue:
      value_.array_->clear();
      break;
   case objectValue:
      value_.map_->clear();
      break;
#endif
   default:
      break;
   }
}

void 
Value::resize( UInt newSize )
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == arrayValue );
   if ( type_ == nullValue )
      *this = Value( arrayValue );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   UInt oldSize = size();
   if ( newSize == 0 )
      clear();
   else if ( newSize > oldSize )
      (*this)[ newSize - 1 ];
   else
   {
      for ( UInt index = newSize; index < oldSize; ++index )
         value_.map_->erase( index );
      assert( size() == newSize );
   }
#else
   value_.array_->resize( newSize );
#endif
}


Value &
Value::operator[]( UInt index )
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == arrayValue );
   if ( type_ == nullValue )
      *this = Value( arrayValue );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString key( index );
   ObjectValues::iterator it = value_.map_->lower_bound( key );
   if ( it != value_.map_->end()  &&  (*it).first == key )
      return (*it).second;

   ObjectValues::value_type defaultValue( key, null );
   it = value_.map_->insert( it, defaultValue );
   return (*it).second;
#else
   return value_.array_->resolveReference( index );
#endif
}


const Value &
Value::operator[]( UInt index ) const
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == arrayValue );
   if ( type_ == nullValue )
      return null;
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString key( index );
   ObjectValues::const_iterator it = value_.map_->find( key );
   if ( it == value_.map_->end() )
      return null;
   return (*it).second;
#else
   Value *value = value_.array_->find( index );
   return value ? *value : null;
#endif
}


Value &
Value::operator[]( const char *key )
{
   return resolveReference( key, false );
}


Value &
Value::resolveReference( const char *key, 
                         bool isStatic )
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == objectValue );
   if ( type_ == nullValue )
      *this = Value( objectValue );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString actualKey( key, isStatic ? CZString::noDuplication 
                                     : CZString::duplicateOnCopy );
   ObjectValues::iterator it = value_.map_->lower_bound( actualKey );
   if ( it != value_.map_->end()  &&  (*it).first == actualKey )
      return (*it).second;

   ObjectValues::value_type defaultValue( actualKey, null );
   it = value_.map_->insert( it, defaultValue );
   Value &value = (*it).second;
   return value;
#else
   return value_.map_->resolveReference( key, isStatic );
#endif
}


Value 
Value::get( UInt index, 
            const Value &defaultValue ) const
{
   const Value *value = &((*this)[index]);
   return value == &null ? defaultValue : *value;
}


bool 
Value::isValidIndex( UInt index ) const
{
   return index < size();
}



const Value &
Value::operator[]( const char *key ) const
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == objectValue );
   if ( type_ == nullValue )
      return null;
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString actualKey( key, CZString::noDuplication );
   ObjectValues::const_iterator it = value_.map_->find( actualKey );
   if ( it == value_.map_->end() )
      return null;
   return (*it).second;
#else
   const Value *value = value_.map_->find( key );
   return value ? *value : null;
#endif
}


Value &
Value::operator[]( const std::string &key )
{
   return (*this)[ key.c_str() ];
}


const Value &
Value::operator[]( const std::string &key ) const
{
   return (*this)[ key.c_str() ];
}

Value &
Value::operator[]( const StaticString &key )
{
   return resolveReference( key, true );
}


# ifdef JSON_USE_CPPTL
Value &
Value::operator[]( const CppTL::ConstString &key )
{
   return (*this)[ key.c_str() ];
}


const Value &
Value::operator[]( const CppTL::ConstString &key ) const
{
   return (*this)[ key.c_str() ];
}
# endif


Value &
Value::append( const Value &value )
{
   return (*this)[size()] = value;
}


Value 
Value::get( const char *key, 
            const Value &defaultValue ) const
{
   const Value *value = &((*this)[key]);
   return value == &null ? defaultValue : *value;
}


Value 
Value::get( const std::string &key,
            const Value &defaultValue ) const
{
   return get( key.c_str(), defaultValue );
}

Value
Value::removeMember( const char* key )
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == objectValue );
   if ( type_ == nullValue )
      return null;
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString actualKey( key, CZString::noDuplication );
   ObjectValues::iterator it = value_.map_->find( actualKey );
   if ( it == value_.map_->end() )
      return null;
   Value old(it->second);
   value_.map_->erase(it);