-/*
- * libudev - interface to udev device information
- *
- * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- */
+/* SPDX-License-Identifier: LGPL-2.1+ */
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <unistd.h>
#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
#include <string.h>
-#include "libudev.h"
-#include "libudev-private.h"
+#include "alloc-util.h"
+#include "libudev-list-internal.h"
+#include "memory-util.h"
/**
* SECTION:libudev-list
* Libudev list operations.
*/
+struct udev_list_node {
+ struct udev_list_node *next, *prev;
+};
+
/**
* udev_list_entry:
*
struct udev_list *list;
char *name;
char *value;
- int num;
+};
+
+struct udev_list {
+ struct udev_list_node node;
+ struct udev_list_entry **entries;
+ unsigned entries_cur;
+ unsigned entries_max;
+ bool unique;
};
/* the list's head points to itself if empty */
-void udev_list_node_init(struct udev_list_node *list)
-{
+static void udev_list_node_init(struct udev_list_node *list) {
list->next = list;
list->prev = list;
}
-int udev_list_node_is_empty(struct udev_list_node *list)
-{
+static int udev_list_node_is_empty(struct udev_list_node *list) {
return list->next == list;
}
static void udev_list_node_insert_between(struct udev_list_node *new,
struct udev_list_node *prev,
- struct udev_list_node *next)
-{
+ struct udev_list_node *next) {
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
-void udev_list_node_append(struct udev_list_node *new, struct udev_list_node *list)
-{
- udev_list_node_insert_between(new, list->prev, list);
-}
-
-void udev_list_node_remove(struct udev_list_node *entry)
-{
+static void udev_list_node_remove(struct udev_list_node *entry) {
struct udev_list_node *prev = entry->prev;
struct udev_list_node *next = entry->next;
}
/* return list entry which embeds this node */
-static inline struct udev_list_entry *list_node_to_entry(struct udev_list_node *node)
-{
+static struct udev_list_entry *list_node_to_entry(struct udev_list_node *node) {
return container_of(node, struct udev_list_entry, node);
}
-void udev_list_init(struct udev *udev, struct udev_list *list, bool unique)
-{
- memset(list, 0x00, sizeof(struct udev_list));
- list->udev = udev;
- list->unique = unique;
+struct udev_list *udev_list_new(bool unique) {
+ struct udev_list *list;
+
+ list = new(struct udev_list, 1);
+ if (!list)
+ return NULL;
+
+ *list = (struct udev_list) {
+ .unique = unique,
+ };
+
udev_list_node_init(&list->node);
+
+ return list;
}
/* insert entry into a list as the last element */
-void udev_list_entry_append(struct udev_list_entry *new, struct udev_list *list)
-{
+static void udev_list_entry_append(struct udev_list_entry *new, struct udev_list *list) {
/* inserting before the list head make the node the last node in the list */
udev_list_node_insert_between(&new->node, list->node.prev, &list->node);
new->list = list;
}
/* insert entry into a list, before a given existing entry */
-void udev_list_entry_insert_before(struct udev_list_entry *new, struct udev_list_entry *entry)
-{
+static void udev_list_entry_insert_before(struct udev_list_entry *new, struct udev_list_entry *entry) {
udev_list_node_insert_between(&new->node, entry->node.prev, &entry->node);
new->list = entry->list;
}
/* binary search in sorted array */
-static int list_search(struct udev_list *list, const char *name)
-{
- unsigned int first, last;
+static int list_search(struct udev_list *list, const char *name) {
+ unsigned first, last;
first = 0;
last = list->entries_cur;
while (first < last) {
- unsigned int i;
+ unsigned i;
int cmp;
i = (first + last)/2;
return -(first+1);
}
-struct udev_list_entry *udev_list_entry_add(struct udev_list *list, const char *name, const char *value)
-{
+struct udev_list_entry *udev_list_entry_add(struct udev_list *list, const char *name, const char *value) {
struct udev_list_entry *entry;
int i = 0;
entry = list->entries[i];
free(entry->value);
- if (value == NULL) {
+ if (!value) {
entry->value = NULL;
return entry;
}
entry->value = strdup(value);
- if (entry->value == NULL)
+ if (!entry->value)
return NULL;
return entry;
}
}
/* add new name */
- entry = calloc(1, sizeof(struct udev_list_entry));
- if (entry == NULL)
+ entry = new0(struct udev_list_entry, 1);
+ if (!entry)
return NULL;
+
entry->name = strdup(name);
- if (entry->name == NULL) {
- free(entry);
- return NULL;
- }
- if (value != NULL) {
+ if (!entry->name)
+ return mfree(entry);
+
+ if (value) {
entry->value = strdup(value);
- if (entry->value == NULL) {
+ if (!entry->value) {
free(entry->name);
- free(entry);
- return NULL;
+ return mfree(entry);
}
}
if (list->unique) {
/* allocate or enlarge sorted array if needed */
if (list->entries_cur >= list->entries_max) {
- unsigned int add;
+ struct udev_list_entry **entries;
+ unsigned add;
add = list->entries_max;
if (add < 1)
add = 64;
- list->entries = realloc(list->entries, (list->entries_max + add) * sizeof(struct udev_list_entry *));
- if (list->entries == NULL) {
+ entries = reallocarray(list->entries, list->entries_max + add, sizeof(struct udev_list_entry *));
+ if (!entries) {
free(entry->name);
free(entry->value);
- return NULL;
+ return mfree(entry);
}
+ list->entries = entries;
list->entries_max += add;
}
i = (-i)-1;
/* insert into sorted list */
- if ((unsigned int)i < list->entries_cur)
+ if ((unsigned)i < list->entries_cur)
udev_list_entry_insert_before(entry, list->entries[i]);
else
udev_list_entry_append(entry, list);
(list->entries_cur - i) * sizeof(struct udev_list_entry *));
list->entries[i] = entry;
list->entries_cur++;
- } else {
+ } else
udev_list_entry_append(entry, list);
- }
return entry;
}
-void udev_list_entry_delete(struct udev_list_entry *entry)
-{
- if (entry->list->entries != NULL) {
+static void udev_list_entry_delete(struct udev_list_entry *entry) {
+ if (entry->list->entries) {
int i;
struct udev_list *list = entry->list;
free(entry);
}
-void udev_list_cleanup(struct udev_list *list)
-{
- struct udev_list_entry *entry_loop;
- struct udev_list_entry *entry_tmp;
+#define udev_list_entry_foreach_safe(entry, tmp, first) \
+ for (entry = first, tmp = udev_list_entry_get_next(entry); \
+ entry; \
+ entry = tmp, tmp = udev_list_entry_get_next(tmp))
+
+void udev_list_cleanup(struct udev_list *list) {
+ struct udev_list_entry *entry_loop, *entry_tmp;
- free(list->entries);
- list->entries = NULL;
+ list->entries = mfree(list->entries);
list->entries_cur = 0;
list->entries_max = 0;
udev_list_entry_foreach_safe(entry_loop, entry_tmp, udev_list_get_entry(list))
udev_list_entry_delete(entry_loop);
}
-struct udev_list_entry *udev_list_get_entry(struct udev_list *list)
-{
+struct udev_list *udev_list_free(struct udev_list *list) {
+ if (!list)
+ return NULL;
+
+ udev_list_cleanup(list);
+
+ return mfree(list);
+}
+
+struct udev_list_entry *udev_list_get_entry(struct udev_list *list) {
if (udev_list_node_is_empty(&list->node))
return NULL;
return list_node_to_entry(list->node.next);
*
* Returns: udev_list_entry, #NULL if no more entries are available.
*/
-_public_ struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry)
-{
+_public_ struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry) {
struct udev_list_node *next;
- if (list_entry == NULL)
+ if (!list_entry)
return NULL;
next = list_entry->node.next;
/* empty list or no more entries */
*
* Returns: udev_list_entry, #NULL if no matching entry is found.
*/
-_public_ struct udev_list_entry *udev_list_entry_get_by_name(struct udev_list_entry *list_entry, const char *name)
-{
+_public_ struct udev_list_entry *udev_list_entry_get_by_name(struct udev_list_entry *list_entry, const char *name) {
int i;
- if (list_entry == NULL)
+ if (!list_entry)
return NULL;
if (!list_entry->list->unique)
*
* Returns: the name string of this entry.
*/
-_public_ const char *udev_list_entry_get_name(struct udev_list_entry *list_entry)
-{
- if (list_entry == NULL)
+_public_ const char *udev_list_entry_get_name(struct udev_list_entry *list_entry) {
+ if (!list_entry)
return NULL;
return list_entry->name;
}
*
* Returns: the value string of this entry.
*/
-_public_ const char *udev_list_entry_get_value(struct udev_list_entry *list_entry)
-{
- if (list_entry == NULL)
+_public_ const char *udev_list_entry_get_value(struct udev_list_entry *list_entry) {
+ if (!list_entry)
return NULL;
return list_entry->value;
}
-
-int udev_list_entry_get_num(struct udev_list_entry *list_entry)
-{
- if (list_entry == NULL)
- return -EINVAL;
- return list_entry->num;
-}
-
-void udev_list_entry_set_num(struct udev_list_entry *list_entry, int num)
-{
- if (list_entry == NULL)
- return;
- list_entry->num = num;
-}
projects / thirdparty / systemd.git / blobdiff