Split code out into separate compilation units (first pass, anyway).

ioutil.h

@@ -0,0 +1,14 @@
+#ifndef __IOUTIL_H
+#define __IOUTIL_H
+
+
+#include "params.h"
+
+char* build_allocation_map(int fd, off64_t size, int resolution);
+int writeloop(int filedes, const void *buffer, size_t size);
+int readloop(int filedes, void *buffer, size_t size);
+int sendfileloop(int out_fd, int in_fd, off64_t *offset, size_t count);
+int splice_via_pipe_loop(int fd_in, int fd_out, size_t len);
+
+#endif
+