From fc3bd53838cdb09c6115a2d89052f684c93787a1 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 29 Aug 2011 14:37:47 +1000
Subject: [PATCH] Add convenience si byte conversions

---
 Makefile.am |  2 ++
 si.cpp      | 29 +++++++++++++++++++++++++++++
 si.hpp      | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 si.cpp
 create mode 100644 si.hpp

diff --git a/Makefile.am b/Makefile.am
index f30140eb..9e4b650e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -29,6 +29,7 @@ UTIL_INCLUDE =  \
     signal.hpp		\
     stream.hpp		\
     string.hpp		\
+    si.hpp		\
     types.hpp		\
     vector.hpp  	\
     version.hpp
@@ -52,6 +53,7 @@ UTIL_FILES   =		\
     signal.cpp		\
     stream.cpp		\
     string.cpp		\
+    si.cpp		\
     types.cpp		\
     vector.cpp  	\
     version.cpp
diff --git a/si.cpp b/si.cpp
new file mode 100644
index 00000000..12888db2
--- /dev/null
+++ b/si.cpp
@@ -0,0 +1,29 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim 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 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * libgim 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 libgim.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011 Danny Robson <danny@blubinc.net>
+ */
+
+#include "si.hpp"
+
+uintmax_t to_KiB (uintmax_t bytes) { return bytes >> 10; }
+uintmax_t to_MiB (uintmax_t bytes) { return bytes >> 20; }
+uintmax_t to_GiB (uintmax_t bytes) { return bytes >> 30; }
+
+uintmax_t from_KiB (uintmax_t bytes) { return bytes << 10; }
+uintmax_t from_MiB (uintmax_t bytes) { return bytes << 20; }
+uintmax_t from_GiB (uintmax_t bytes) { return bytes << 30; }
+
diff --git a/si.hpp b/si.hpp
new file mode 100644
index 00000000..c214df30
--- /dev/null
+++ b/si.hpp
@@ -0,0 +1,33 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim 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 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * libgim 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 libgim.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011 Danny Robson <danny@blubinc.net>
+ */
+
+#ifndef __UTIL_SI_HPP
+#define __UTIL_SI_HPP
+
+#include <cstdint>
+
+uintmax_t to_KiB (uintmax_t bytes);
+uintmax_t to_MiB (uintmax_t bytes);
+uintmax_t to_GiB (uintmax_t bytes);
+
+uintmax_t from_KiB (uintmax_t bytes);
+uintmax_t from_MiB (uintmax_t bytes);
+uintmax_t from_GiB (uintmax_t bytes);
+
+#endif