Binary heaps
============

* <<intro,Introduction>>
* <<macros,Macros>>
* <<example,Example>>

!!ucw/heap.h

[[example]]
Example
-------

  static uns n;
  static int heap[4];

  // Create an empty heap
  n = 0;
  #define MY_CMP(x, y) ((x) < (y))

  // Insert 20, 10, 30
  heap[n + 1] = 20;
  HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP);
  heap[n + 1] = 10;
  HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP);
  heap[n + 1] = 30;
  HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP);

  // Remove the minimum (10)
  HEAP_DELMIN(int, heap, n, MY_CMP, HEAP_SWAP);

  // Print the new minimum (20)
  printf("%d", heap[1]);

  // Increase the minimum by 20 to 40
  heap[1] += 20;
  HEAP_INCREASE(int, heap, n, MY_CMP, HEAP_SWAP, 1);

  // Print the new minimum (30)
  printf("%d", heap[1]);