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Diffstat (limited to 'watch-library/hal/utils/src/utils_list.c')
-rw-r--r-- | watch-library/hal/utils/src/utils_list.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/watch-library/hal/utils/src/utils_list.c b/watch-library/hal/utils/src/utils_list.c new file mode 100644 index 00000000..4006a019 --- /dev/null +++ b/watch-library/hal/utils/src/utils_list.c @@ -0,0 +1,136 @@ +/** + * \file + * + * \brief List functionality implementation. + * + * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \asf_license_stop + * + */ + +#include <utils_list.h> +#include <utils_assert.h> + +/** + * \brief Check whether element belongs to list + */ +bool is_list_element(const struct list_descriptor *const list, const void *const element) +{ + struct list_element *it; + for (it = list->head; it; it = it->next) { + if (it == element) { + return true; + } + } + + return false; +} + +/** + * \brief Insert an element as list head + */ +void list_insert_as_head(struct list_descriptor *const list, void *const element) +{ + ASSERT(!is_list_element(list, element)); + + ((struct list_element *)element)->next = list->head; + list->head = (struct list_element *)element; +} + +/** + * \brief Insert an element after the given list element + */ +void list_insert_after(void *const after, void *const element) +{ + ((struct list_element *)element)->next = ((struct list_element *)after)->next; + ((struct list_element *)after)->next = (struct list_element *)element; +} + +/** + * \brief Insert an element at list end + */ +void list_insert_at_end(struct list_descriptor *const list, void *const element) +{ + struct list_element *it = list->head; + + ASSERT(!is_list_element(list, element)); + + if (!list->head) { + list->head = (struct list_element *)element; + ((struct list_element *)element)->next = NULL; + return; + } + + while (it->next) { + it = it->next; + } + it->next = (struct list_element *)element; + ((struct list_element *)element)->next = NULL; +} + +/** + * \brief Removes list head + */ +void *list_remove_head(struct list_descriptor *const list) +{ + if (list->head) { + struct list_element *tmp = list->head; + + list->head = list->head->next; + return (void *)tmp; + } + + return NULL; +} + +/** + * \brief Removes list element + */ +bool list_delete_element(struct list_descriptor *const list, const void *const element) +{ + if (!element) { + return false; + } + + if (list->head == element) { + list->head = list->head->next; + return true; + } else { + struct list_element *it = list->head; + + while (it && it->next != element) { + it = it->next; + } + if (it) { + it->next = ((struct list_element *)element)->next; + return true; + } + } + + return false; +} + +//@} |