diff options
Diffstat (limited to 'cpukit/sapi/src/sapirbtreeinsert.c')
-rw-r--r-- | cpukit/sapi/src/sapirbtreeinsert.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/cpukit/sapi/src/sapirbtreeinsert.c b/cpukit/sapi/src/sapirbtreeinsert.c new file mode 100644 index 0000000000..db55e4358b --- /dev/null +++ b/cpukit/sapi/src/sapirbtreeinsert.c @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2010-2012 Gedare Bloom. + * + * 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/rbtree.h> +#include <rtems/score/rbtreeimpl.h> + +RTEMS_STATIC_ASSERT( + sizeof( rtems_rbtree_compare_result ) >= sizeof( intptr_t ), + rtems_rbtree_compare_result_intptr_t +); + +RTEMS_STATIC_ASSERT( + sizeof( rtems_rbtree_compare_result ) >= sizeof( int32_t ), + rtems_rbtree_compare_result_int32_t +); + +rtems_rbtree_node *rtems_rbtree_insert( + rtems_rbtree_control *the_rbtree, + rtems_rbtree_node *the_node, + rtems_rbtree_compare compare, + bool is_unique +) +{ + rtems_rbtree_node **which = _RBTree_Root_reference( the_rbtree ); + rtems_rbtree_node *parent = NULL; + + while ( *which != NULL ) { + rtems_rbtree_compare_result compare_result; + + parent = *which; + compare_result = ( *compare )( the_node, parent ); + + if ( is_unique && rtems_rbtree_is_equal( compare_result ) ) { + return parent; + } + + if ( rtems_rbtree_is_lesser( compare_result ) ) { + which = _RBTree_Left_reference( parent ); + } else { + which = _RBTree_Right_reference( parent ); + } + } + + _RBTree_Initialize_node( the_node ); + _RBTree_Add_child( the_node, parent, which ); + _RBTree_Insert_color( the_rbtree, the_node ); + + return NULL; +} |