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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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/*-------------------------------------------------------------------------
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*
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* rbtree.h
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* interface for PostgreSQL generic Red-Black binary tree package
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*
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* Copyright (c) 1996-2009, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/include/utils/rbtree.h,v 1.1 2010/02/11 14:29:50 teodor Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef RBTREE_H
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#define RBTREE_H
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typedef struct RBTree RBTree;
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typedef struct RBTreeIterator RBTreeIterator;
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typedef int (*rb_comparator) (const void *a, const void *b, void *arg);
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typedef void* (*rb_appendator) (void *current, void *new, void *arg);
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typedef void (*rb_freefunc) (void *a);
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extern RBTree *rb_create(rb_comparator comparator,
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rb_appendator appendator,
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rb_freefunc freefunc,
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void *arg);
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extern void *rb_find(RBTree *rb, void *data);
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extern void *rb_insert(RBTree *rb, void *data);
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extern void rb_delete(RBTree *rb, void *data);
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extern void *rb_leftmost(RBTree *rb);
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typedef enum RBOrderControl
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{
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LeftRightWalk,
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RightLeftWalk,
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DirectWalk,
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InvertedWalk
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} RBOrderControl;
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extern RBTreeIterator* rb_begin_iterate(RBTree *rb, RBOrderControl ctrl);
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extern void *rb_iterate(RBTreeIterator *iterator);
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extern void rb_free_iterator(RBTreeIterator *iterator);
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#endif
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