src/external/3rd/library/perforce/include/vararray.h

   1 /*
   2  * Copyright 1995, 1996 Perforce Software.  All rights reserved.
   3  */
   4
   5 /*
   6  * VarArray.h - manage a list of void *'s
   7  *
   8  * Class Defined:
   9  *
  10  *      VarArray - list of void *'s
  11  *
  12  * Public methods:
  13  *
  14  *      VarArray::Clear() - zero out count for values
  15  *      VarArray::Count() - return count of elements in array
  16  *      VarArray::ElemTab() - return a pointer to the array
  17  *      VarArray::Get(i) - return a pointer to slot i in the array
  18  *      VarArray::Move(i,j) - move element i to j
  19  *      VarArray::Put(v) - set a new slot to v
  20  *      VarArray::WillGrow(i) - returns size of new vararray if it
  21  *                              would have to grow in the next i rows.
  22  *
  23  * Private methods:
  24  *
  25  *      VarArray::New() - return a pointer to a new slot in the array
  26  */
  27
  28 class VarArray {
  29
  30     public:
  31
  32                         VarArray();
  33                         VarArray( int max );
  34                         ~VarArray();
  35
  36         void            Clear() { numElems = 0; }
  37         int             Count() const { return numElems; }
  38         void **         ElemTab() { return elems; }
  39         void *          Get( int i ) const { return i<numElems ? elems[i]:0; }
  40         void            Move( int i, int j ) { elems[j] = elems[i]; }
  41         void            Exchange( int i, int j )
  42             { void *t = elems[j]; elems[j] = elems[i]; elems[i] = t; }
  43         void *          Put( void *v ) { return *New() = v; }
  44         void            SetCount( int i ) { numElems = i; }
  45         int             WillGrow( int interval );
  46
  47     private:
  48         void **         New();
  49
  50         int             maxElems;
  51         int             numElems;
  52         void            **elems;
  53 } ;
  54