| /* |
| * 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 */ |
| |