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Diffstat (limited to 'cpukit/score/src/rbtreereplace.c')
-rw-r--r-- | cpukit/score/src/rbtreereplace.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/cpukit/score/src/rbtreereplace.c b/cpukit/score/src/rbtreereplace.c new file mode 100644 index 0000000000..7a54000854 --- /dev/null +++ b/cpukit/score/src/rbtreereplace.c @@ -0,0 +1,61 @@ +/** + * @file + * + * @ingroup ScoreRBTree + * + * @brief _RBTree_Replace_node() implementation. + */ + +/* + * Copyright (c) 2015 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#if HAVE_CONFIG_H + #include "config.h" +#endif + +#include <rtems/score/rbtree.h> + +void _RBTree_Replace_node( + RBTree_Control *the_rbtree, + RBTree_Node *victim, + RBTree_Node *replacement +) +{ + RBTree_Node *parent = _RBTree_Parent( victim ); + RBTree_Node **link; + RBTree_Node *child; + + if (parent != NULL) { + if ( victim == _RBTree_Left( parent ) ) { + link = _RBTree_Left_reference( parent ); + } else { + link = _RBTree_Right_reference( parent ); + } + } else { + link = _RBTree_Root_reference( the_rbtree ); + } + *link = replacement; + + child = _RBTree_Left( victim ); + if ( child != NULL ) { + RB_PARENT( child, Node ) = replacement; + } + + child = _RBTree_Right( victim ); + if ( child != NULL ) { + RB_PARENT( child, Node ) = replacement; + } + + *replacement = *victim; +} |