day 6

1 files changed, 46 insertions, 0 deletions

diff --git a/list.c b/list.c
new file mode 100644
index 0000000..6001424
--- /dev/null
+++ b/list.c
@@ -0,0 +1,46 @@
+#include <err.h>
+#include "list.h"
+
+#define LIST_SIZE 50
+
+struct long_list* long_list_init(size_t size) {
+	struct long_list* list = malloc(sizeof(struct long_list));
+	list->list = malloc(sizeof(long) * size);
+	list->alloc_size = size;
+	list->length = 0;
+	return list;
+}
+
+void long_list_free(struct long_list* list) {
+	if(list == NULL)
+		return;
+
+	if(list->list != NULL)
+		free(list->list);
+
+	free(list);
+}
+
+void long_list_add(struct long_list* list, long value) {
+	// increase space if needed
+	if(list->length >= list->alloc_size) {
+		list->list = realloc(list->list, sizeof(long) * (list->alloc_size + LIST_SIZE));
+		list->alloc_size += LIST_SIZE;
+	}
+	list->list[list->length] = value;
+	list->length = list->length + 1;
+}
+
+long long_list_get(struct long_list* list, size_t index) {
+	if(index >= list->length)
+		err(1, "index %ld out of bounds (%ld)", index, list->length);
+
+	return list->list[index];
+}
+
+void long_list_set(struct long_list* list, size_t index, long value) {
+	if(index >= list->length)
+		err(1, "index %ld out of bounds (%ld)", index, list->length);
+
+	list->list[index] = value;
+}