1 files changed, 92 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..826bfbe
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,92 @@
+/*
+ * utils.c
+ *
+ * Copyright (C) 2009 Hector Martin <hector@marcansoft.com>
+ * Copyright (C) 2009 Nikias Bassen <nikias@gmx.li>
+ * Copyright (c) 2013 Federico Mena Quintero
+ *
+ * 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.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "utils.h"
+
+#define CAPACITY_STEP 8
+
+void collection_init(struct collection *col)
+{
+	col->list = malloc(sizeof(void *) * CAPACITY_STEP);
+	memset(col->list, 0, sizeof(void *) * CAPACITY_STEP);
+	col->capacity = CAPACITY_STEP;
+}
+
+void collection_free(struct collection *col)
+{
+	free(col->list);
+	col->list = NULL;
+	col->capacity = 0;
+}
+
+void collection_add(struct collection *col, void *element)
+{
+	int i;
+	for(i=0; i<col->capacity; i++) {
+		if(!col->list[i]) {
+			col->list[i] = element;
+			return;
+		}
+	}
+	col->list = realloc(col->list, sizeof(void*) * (col->capacity + CAPACITY_STEP));
+	memset(&col->list[col->capacity], 0, sizeof(void *) * CAPACITY_STEP);
+	col->list[col->capacity] = element;
+	col->capacity += CAPACITY_STEP;
+}
+
+void collection_remove(struct collection *col, void *element)
+{
+	int i;
+	for(i=0; i<col->capacity; i++) {
+		if(col->list[i] == element) {
+			col->list[i] = NULL;
+			return;
+		}
+	}
+}
+
+int collection_count(struct collection *col)
+{
+	int i, cnt = 0;
+	for(i=0; i<col->capacity; i++) {
+		if(col->list[i])
+			cnt++;
+	}
+	return cnt;
+}
+
+void collection_copy(struct collection *dest, struct collection *src)
+{
+	if (!dest || !src) return;
+	dest->capacity = src->capacity;
+	dest->list = malloc(sizeof(void*) * src->capacity);
+	memcpy(dest->list, src->list, sizeof(void*) * src->capacity);
+}