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/*
* Copyright (c) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PAS_TREE_DIRECTION_H
#define PAS_TREE_DIRECTION_H
#include "pas_utils.h"
PAS_BEGIN_EXTERN_C;
enum pas_tree_direction {
pas_tree_direction_left,
pas_tree_direction_right
};
typedef enum pas_tree_direction pas_tree_direction;
static inline const char* pas_tree_direction_get_string(pas_tree_direction direction)
{
switch (direction) {
case pas_tree_direction_left:
return "left";
case pas_tree_direction_right:
return "right";
}
PAS_ASSERT(!"Should not be reached");
return NULL;
}
static inline pas_tree_direction pas_tree_direction_invert(pas_tree_direction direction)
{
switch (direction) {
case pas_tree_direction_left:
return pas_tree_direction_right;
case pas_tree_direction_right:
return pas_tree_direction_left;
}
PAS_ASSERT(!"Should not be reached");
return pas_tree_direction_left;
}
static inline int
pas_tree_direction_invert_comparison_result_if_right(
pas_tree_direction direction,
int comparison_result)
{
switch (direction) {
case pas_tree_direction_left:
return comparison_result;
case pas_tree_direction_right:
return -comparison_result;
}
PAS_ASSERT(!"Should not be reached");
return 0;
}
PAS_END_EXTERN_C;
#endif /* PAS_TREE_DIRECTION_H */