Initial du_buff code

Compiles but untested. Expect bugs.

1 files changed, 65 insertions, 0 deletions

diff --git a/include/ouroboros/du_buff.h b/include/ouroboros/du_buff.h
new file mode 100644
index 00000000..1d7b260a
--- /dev/null
+++ b/include/ouroboros/du_buff.h
@@ -0,0 +1,65 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Data Unit Buffer
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_DU_BUFF_H
+#define OUROBOROS_DU_BUFF_H
+
+#include <stdint.h>
+#include <unistd.h>
+#include <stdbool.h>
+
+#include "list.h"
+
+/*FIXME: to be defined inside du_buff_t */
+
+struct buffer {
+        uint8_t        * data;
+        size_t           size;
+        struct list_head list;
+} buffer;
+
+typedef struct {
+        struct buffer  * buffer;
+        size_t           size;
+        size_t           du_start;
+        size_t           du_end;
+        struct list_head list;
+} du_buff_t;
+
+du_buff_t * du_buff_create(size_t size);
+void        du_buff_destroy(du_buff_t * dub);
+
+int         du_buff_init(du_buff_t * dub,
+                         size_t      start,
+                         uint8_t *   data,
+                         size_t      len);
+
+uint8_t   * du_buff_data_ptr_start(du_buff_t * dub);
+uint8_t   * du_buff_data_ptr_end(du_buff_t * dub);
+
+int         du_buff_head_alloc(du_buff_t * dub, size_t size);
+int         du_buff_tail_alloc(du_buff_t * dub, size_t size);
+int         du_buff_head_release(du_buff_t * dub, size_t size);
+int         du_buff_tail_release(du_buff_t * dub, size_t size);
+
+#endif /* OUROBOROS_DU_BUFF_H */