◄Up► ◄Contents► ◄Index► ◄Back►
─────C/C++ Language─────────────────────────────────────────────────────────
 
  Keyword:   __huge
 
  Syntax:    type __huge declarator
             class __huge class-name
             class __huge class-name func()
             type member-func() __huge
 
  Summary:   Specifies that a data object can reside anywhere in
             memory and is not assumed to reside in the current data
             segment. Individual data items can exceed 64K in size.
             Data is referenced with a 32-bit address, and pointers
             declared as __huge are 32-bit values.
 
  See also:  __based, __far, __near
             ◄Memory Models►
 
     The __huge keyword can be used to modify data objects, pointers,
     classes, the this pointer of member functions, and the addressing
     mode of objects returned by functions.
 
     If the /Zc compiler switch is used, both huge and _huge are
     synonyms for __huge. If /Za is used, only __huge is accepted.
 
     NOTE: Do not use __huge in 32-bit programs.
 
     Data Objects or Pointers
 
     The compiler can put a huge data object anywhere in memory. A huge
     object can be larger than 64K.
 
     A huge pointer is a 32-bit value and can address data in any
     segment.
 
     For example:
 
          char __huge a[100000];       // A huge array
          char __huge *hp;             // A huge pointer
 
     Classes
 
     Objects of a huge class can reside anywhere in memory and can be
     larger than 64K in size, unless an overriding keyword appears in
     the individual declaration. Structure or union types also can be
     declared __huge.
 
     For example:
 
          class __huge Node
          {
             // ...
          };
 
          Node my_node;              // Huge by default
          Node __near your_node;     // Explicitly declared __near
 
     The this Pointer of Member Functions
 
     You can overload a member function to operate on huge objects
     if objects of the class are not huge by default. Within the
     function, the this pointer is a huge pointer.
 
     For example:
 
          class Node
          {
          public:
             void print() __huge;    // Called for huge objects
             void print();           // Called for default objects
          private:
             // ...
          };
 
     The Addressing Mode of Return Objects
 
     You can specify that a function returns a huge object. This is
     useful if you call a member function for the temporary object
     returned by the function.
 
     For example:
 
          class __huge Node make_node(); // Function returns a huge Node
 
          make_node().print();     // Call huge print() for temporary
                                   //    object
                                    -♦-