OVMS3-idf/components/bt/common/osi/list.c

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2019-06-30 08:39:00 +00:00
#include "bt_common.h"
#include "osi/allocator.h"
#include "osi/list.h"
#include "osi/osi.h"
struct list_node_t {
struct list_node_t *next;
void *data;
};
typedef struct list_t {
list_node_t *head;
list_node_t *tail;
size_t length;
list_free_cb free_cb;
} list_t;
//static list_node_t *list_free_node_(list_t *list, list_node_t *node);
// Hidden constructor, only to be used by the hash map for the allocation tracker.
// Behaves the same as |list_new|, except you get to specify the allocator.
list_t *list_new_internal(list_free_cb callback)
{
list_t *list = (list_t *) osi_calloc(sizeof(list_t));
if (!list) {
return NULL;
}
list->head = list->tail = NULL;
list->length = 0;
list->free_cb = callback;
return list;
}
list_t *list_new(list_free_cb callback)
{
return list_new_internal(callback);
}
void list_free(list_t *list)
{
if (!list) {
return;
}
list_clear(list);
osi_free(list);
}
bool list_is_empty(const list_t *list)
{
assert(list != NULL);
return (list->length == 0);
}
bool list_contains(const list_t *list, const void *data)
{
assert(list != NULL);
assert(data != NULL);
for (const list_node_t *node = list_begin(list); node != list_end(list); node = list_next(node)) {
if (list_node(node) == data) {
return true;
}
}
return false;
}
size_t list_length(const list_t *list)
{
assert(list != NULL);
return list->length;
}
void *list_front(const list_t *list)
{
assert(list != NULL);
assert(!list_is_empty(list));
return list->head->data;
}
void *list_back(const list_t *list) {
assert(list != NULL);
assert(!list_is_empty(list));
return list->tail->data;
}
list_node_t *list_back_node(const list_t *list) {
assert(list != NULL);
assert(!list_is_empty(list));
return list->tail;
}
bool list_insert_after(list_t *list, list_node_t *prev_node, void *data) {
2018-09-18 06:49:08 +00:00
assert(list != NULL);
assert(prev_node != NULL);
assert(data != NULL);
list_node_t *node = (list_node_t *)osi_calloc(sizeof(list_node_t));
if (!node) {
return false;
}
node->next = prev_node->next;
node->data = data;
prev_node->next = node;
if (list->tail == prev_node) {
list->tail = node;
}
++list->length;
return true;
}
bool list_prepend(list_t *list, void *data)
{
assert(list != NULL);
assert(data != NULL);
list_node_t *node = (list_node_t *)osi_calloc(sizeof(list_node_t));
if (!node) {
return false;
}
node->next = list->head;
node->data = data;
list->head = node;
if (list->tail == NULL) {
list->tail = list->head;
}
++list->length;
return true;
}
bool list_append(list_t *list, void *data)
{
assert(list != NULL);
assert(data != NULL);
list_node_t *node = (list_node_t *)osi_calloc(sizeof(list_node_t));
if (!node) {
return false;
}
node->next = NULL;
node->data = data;
if (list->tail == NULL) {
list->head = node;
list->tail = node;
} else {
list->tail->next = node;
list->tail = node;
}
++list->length;
return true;
}
bool list_remove(list_t *list, void *data)
{
assert(list != NULL);
assert(data != NULL);
if (list_is_empty(list)) {
return false;
}
if (list->head->data == data) {
list_node_t *next = list_free_node(list, list->head);
if (list->tail == list->head) {
list->tail = next;
}
list->head = next;
return true;
}
for (list_node_t *prev = list->head, *node = list->head->next; node; prev = node, node = node->next)
if (node->data == data) {
prev->next = list_free_node(list, node);
if (list->tail == node) {
list->tail = prev;
}
return true;
}
return false;
}
void list_clear(list_t *list)
{
assert(list != NULL);
for (list_node_t *node = list->head; node; ) {
node = list_free_node(list, node);
}
list->head = NULL;
list->tail = NULL;
list->length = 0;
}
list_node_t *list_foreach(const list_t *list, list_iter_cb callback, void *context)
{
assert(list != NULL);
assert(callback != NULL);
for (list_node_t *node = list->head; node; ) {
list_node_t *next = node->next;
if (!callback(node->data, context)) {
return node;
}
node = next;
}
return NULL;
}
list_node_t *list_begin(const list_t *list)
{
assert(list != NULL);
return list->head;
}
list_node_t *list_end(UNUSED_ATTR const list_t *list)
{
assert(list != NULL);
return NULL;
}
list_node_t *list_next(const list_node_t *node)
{
assert(node != NULL);
return node->next;
}
void *list_node(const list_node_t *node)
{
assert(node != NULL);
return node->data;
}
list_node_t *list_free_node(list_t *list, list_node_t *node)
{
assert(list != NULL);
assert(node != NULL);
list_node_t *next = node->next;
if (list->free_cb) {
list->free_cb(node->data);
}
osi_free(node);
--list->length;
return next;
}