X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=user.c;h=1bdd34bbc9274ebe74ffd8d0401e9ecdae3cdf9e;hb=e23b8a9551b07e7fa289f8fbac047565e88a8c04;hp=3f368e2a6ed6bcecdf176b23122fcb9cf49af7c8;hpb=63ef06be534ab9a8f31865ef6c2324f0a951aef9;p=adu.git

diff --git a/user.c b/user.c
index 3f368e2..1bdd34b 100644
--- a/user.c
+++ b/user.c
@@ -50,6 +50,9 @@ static struct user_info *uid_hash_table;
 /** This is always a power of two. It is set in create_hash_table(). */
 static uint32_t uid_hash_table_size;
 
+/* Array of indices to the entries of \a uid_hash_table. */
+static int *uid_hash_table_sort_idx;
+
 /** The number of used slots in the hash table. */
 static uint32_t num_uids = 0;
 
@@ -276,11 +279,13 @@ err:
 int for_each_admissible_user(int (*func)(struct user_info *, void *),
 		void *data)
 {
-	struct user_info *ui;
+	int i;
 
 	assert(uid_hash_table);
-	FOR_EACH_USER(ui) {
+	for (i = 0; i < uid_hash_table_size; i++) {
 		int ret;
+		struct user_info *ui = uid_hash_table +
+			uid_hash_table_sort_idx[i];
 
 		if (!ui_used(ui) || !ui_admissible(ui))
 			continue;
@@ -296,9 +301,14 @@ int for_each_admissible_user(int (*func)(struct user_info *, void *),
 
 void create_hash_table(unsigned bits)
 {
+	int i;
+
 	uid_hash_table_size = 1 << bits;
 	uid_hash_table = adu_calloc(uid_hash_table_size *
 		sizeof(struct user_info));
+	uid_hash_table_sort_idx = adu_malloc(uid_hash_table_size * sizeof(int));
+	for (i = 0; i < uid_hash_table_size; i++)
+		uid_hash_table_sort_idx[i] = i;
 }
 
 void close_user_tables(void)
@@ -330,6 +340,8 @@ void close_user_tables(void)
 	}
 	free(uid_hash_table);
 	uid_hash_table = NULL;
+	free(uid_hash_table_sort_idx);
+	uid_hash_table_sort_idx = NULL;
 }
 
 /*
@@ -387,10 +399,20 @@ static char *get_uid_list_name(void)
 	return make_message("%s/uid_list", conf.database_dir_arg);
 }
 
-void sort_hash_table(int (*comp)(const void *, const void *))
+static int (*hash_table_comparator)(struct user_info *a, struct user_info *b);
+
+static int comp_wrapper(const void *a, const void *b)
+{
+	struct user_info *x = uid_hash_table + *(unsigned *)a;
+	struct user_info *y = uid_hash_table + *(unsigned *)b;
+	return hash_table_comparator(x, y);
+}
+
+void sort_hash_table(int (*comp)(struct user_info *, struct user_info *))
 {
-	qsort(uid_hash_table, uid_hash_table_size, sizeof(struct user_info),
-		comp);
+	hash_table_comparator = comp;
+	qsort(uid_hash_table_sort_idx, uid_hash_table_size,
+		sizeof(*uid_hash_table_sort_idx), comp_wrapper);
 }
 
 int open_admissible_user_tables(struct uid_range *admissible_uids)