7.0 refactor

src/iobuf.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stddef.h>
+
+struct mg_iobuf {
+  unsigned char *buf;
+  size_t size, len;
+};
+
+void mg_iobuf_init(struct mg_iobuf *, size_t);
+void mg_iobuf_resize(struct mg_iobuf *, size_t);
+void mg_iobuf_free(struct mg_iobuf *);
+size_t mg_iobuf_append(struct mg_iobuf *, const void *, size_t, size_t);
+size_t mg_iobuf_delete(struct mg_iobuf *, size_t);