radsecproxy-1.6.5.

[radsecproxy.git] / list.c

diff --git a/list.c b/list.c
index 6aacfbd..be59fff 100644 (file)
--- a/list.c
+++ b/list.c
@@ -1,7 +1,33 @@
+/*
+ * Copyright (C) 2006-2009 Stig Venaas <venaas@uninett.no>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+
 #include <stdlib.h>
 #include <string.h>
 #include "list.h"
 
+/* Private helper functions. */
+static void list_free_helper_(struct list *list, int free_data_flag) {
+    struct list_node *node, *next;
+
+    if (!list)
+       return;
+
+    for (node = list->first; node; node = next) {
+        if (free_data_flag)
+            free(node->data);
+       next = node->next;
+       free(node);
+    }
+    free(list);
+}
+
+/* Public functions. */
+
 /* allocates and initialises list structure; returns NULL if malloc fails */
 struct list *list_create() {
     struct list *list = malloc(sizeof(struct list));
@@ -10,16 +36,18 @@ struct list *list_create() {
     return list;
 }
 
-/* frees all memory associated with the list */
+/* frees all memory associated with the list
+   note that the data pointed at from each node is also freed
+   use list_free() to free only the memory used by the list itself */
 void list_destroy(struct list *list) {
-    struct list_node *node, *next;
-    
-    for (node = list->first; node; node = next) {
-       free(node->data);
-       next = node->next;
-       free(node);
-    }
-    free(list);
+    list_free_helper_(list, 1);
+}
+
+/* frees the meory used by the list itself
+   note that the data pointed at from each node is not freed
+   use list_destroy() to free all the data associated with the list */
+void list_free(struct list *list) {
+    list_free_helper_(list, 0);
 }
 
 /* appends entry to list; returns 1 if ok, 0 if malloc fails */
@@ -29,7 +57,7 @@ int list_push(struct list *list, void *data) {
     node = malloc(sizeof(struct list_node));
     if (!node)
        return 0;
-    
+
     node->next = NULL;
     node->data = data;
 
@@ -38,7 +66,8 @@ int list_push(struct list *list, void *data) {
     else
        list->first = node;
     list->last = node;
-    
+
+    list->count++;
     return 1;
 }
 
@@ -46,43 +75,48 @@ int list_push(struct list *list, void *data) {
 void *list_shift(struct list *list) {
     struct list_node *node;
     void *data;
-    
-    if (!list->first)
+
+    if (!list || !list->first)
        return NULL;
-    
+
     node = list->first;
     list->first = node->next;
     if (!list->first)
        list->last = NULL;
     data = node->data;
     free(node);
-    
+    list->count--;
     return data;
 }
 
-/* removes first entry with matching data pointer */
+/* removes all entries with matching data pointer */
 void list_removedata(struct list *list, void *data) {
     struct list_node *node, *t;
-    
-    if (!list->first)
+
+    if (!list || !list->first)
        return;
 
     node = list->first;
-    if (node->data == data) {
+    while (node->data == data) {
        list->first = node->next;
-       if (!list->first)
-           list->last = NULL;
        free(node);
-       return;
+       list->count--;
+       node = list->first;
+       if (!node) {
+           list->last = NULL;
+           return;
+       }
     }
     for (; node->next; node = node->next)
        if (node->next->data == data) {
            t = node->next;
-           node->next = node->next->next;
-           if (!node->next) /* we removed the last one */
-               list->last = node;
+           node->next = t->next;
            free(t);
-           return;
+           list->count--;
+           if (!node->next) { /* we removed the last one */
+               list->last = node;
+               return;
+           }
        }
 }
 
@@ -95,3 +129,12 @@ struct list_node *list_first(struct list *list) {
 struct list_node *list_next(struct list_node *node) {
     return node->next;
 }
+
+/* returns number of nodes */
+uint32_t list_count(struct list *list) {
+    return list->count;
+}
+
+/* Local Variables: */
+/* c-file-style: "stroustrup" */
+/* End: */