update name of code to labcodes

2013-09-17 22:21:48 +08:00
parent 759eca9dda
commit 3f8d5876b9
726 changed files with 0 additions and 0 deletions
--- a/labcodes/lab8/libs/skew_heap.h
+++ b/labcodes/lab8/libs/skew_heap.h
@@ -0,0 +1,87 @@
+#ifndef __LIBS_SKEW_HEAP_H__
+#define __LIBS_SKEW_HEAP_H__
+
+struct skew_heap_entry {
+     struct skew_heap_entry *parent, *left, *right;
+};
+
+typedef struct skew_heap_entry skew_heap_entry_t;
+
+typedef int(*compare_f)(void *a, void *b);
+
+static inline void skew_heap_init(skew_heap_entry_t *a) __attribute__((always_inline));
+static inline skew_heap_entry_t *skew_heap_merge(
+     skew_heap_entry_t *a, skew_heap_entry_t *b,
+     compare_f comp);
+static inline skew_heap_entry_t *skew_heap_insert(
+     skew_heap_entry_t *a, skew_heap_entry_t *b,
+     compare_f comp) __attribute__((always_inline));
+static inline skew_heap_entry_t *skew_heap_remove(
+     skew_heap_entry_t *a, skew_heap_entry_t *b,
+     compare_f comp) __attribute__((always_inline));
+
+static inline void
+skew_heap_init(skew_heap_entry_t *a)
+{
+     a->left = a->right = a->parent = NULL;
+}
+
+static inline skew_heap_entry_t *
+skew_heap_merge(skew_heap_entry_t *a, skew_heap_entry_t *b,
+                compare_f comp)
+{
+     if (a == NULL) return b;
+     else if (b == NULL) return a;
+     
+     skew_heap_entry_t *l, *r;
+     if (comp(a, b) == -1)
+     {
+          r = a->left;
+          l = skew_heap_merge(a->right, b, comp);
+          
+          a->left = l;
+          a->right = r;
+          if (l) l->parent = a;
+
+          return a;
+     }
+     else
+     {
+          r = b->left;
+          l = skew_heap_merge(a, b->right, comp);
+          
+          b->left = l;
+          b->right = r;
+          if (l) l->parent = b;
+
+          return b;
+     }
+}
+
+static inline skew_heap_entry_t *
+skew_heap_insert(skew_heap_entry_t *a, skew_heap_entry_t *b,
+                 compare_f comp)
+{
+     skew_heap_init(b);
+     return skew_heap_merge(a, b, comp);
+}
+
+static inline skew_heap_entry_t *
+skew_heap_remove(skew_heap_entry_t *a, skew_heap_entry_t *b,
+                 compare_f comp)
+{
+     skew_heap_entry_t *p   = b->parent;
+     skew_heap_entry_t *rep = skew_heap_merge(b->left, b->right, comp);
+     if (rep) rep->parent = p;
+     
+     if (p)
+     {
+          if (p->left == b)
+               p->left = rep;
+          else p->right = rep;
+          return a;
+     }
+     else return rep;
+}
+
+#endif    /* !__LIBS_SKEW_HEAP_H__ */