object: add generic byte-buffer data structure

object/buffer.h

@@ -0,0 +1,17 @@
+#ifndef _BLUELIB_BUFFER_H_
+#define _BLUELIB_BUFFER_H_
+
+#include "../object.h"
+
+struct b_buffer {
+	struct b_object buf_base;
+	/* number of items in buffer */
+	unsigned int buf_len;
+	/* maximum number of items that can currently be stored in array */
+	unsigned int buf_cap;
+	/* the size of each individual item in the buffer */
+	unsigned int buf_itemsz;
+	void *buf_data;
+};
+
+#endif