From 471de289672300e3d52df96b1e432ad49f33b222 Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Fri, 8 Jul 2016 11:06:02 -0300
Subject: [PATCH] AP_Common: provide minimal byteswap.h and endian.h

---
 libraries/AP_Common/missing/byteswap.h | 24 ++++++++++++++++++++++++
 libraries/AP_Common/missing/endian.h   | 16 ++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 libraries/AP_Common/missing/byteswap.h
 create mode 100644 libraries/AP_Common/missing/endian.h

diff --git a/libraries/AP_Common/missing/byteswap.h b/libraries/AP_Common/missing/byteswap.h
new file mode 100644
index 0000000000..8e014caa9c
--- /dev/null
+++ b/libraries/AP_Common/missing/byteswap.h
@@ -0,0 +1,24 @@
+#if defined(HAVE_BYTESWAP_H) && HAVE_BYTESWAP_H
+#include_next <byteswap.h>
+#else
+
+#include <inttypes.h>
+
+/* minimal version defining only the macros we need in our codebase */
+
+static inline uint16_t __bswap_16(uint16_t u)
+{
+    return (uint16_t) __builtin_bswap16(u);
+}
+
+static inline uint32_t __bswap_32(uint32_t u)
+{
+    return (uint32_t) __builtin_bswap32(u);
+}
+
+static inline uint64_t __bswap_64(uint64_t u)
+{
+    return (uint64_t) __builtin_bswap64(u);
+}
+
+#endif
diff --git a/libraries/AP_Common/missing/endian.h b/libraries/AP_Common/missing/endian.h
new file mode 100644
index 0000000000..ed39019c0d
--- /dev/null
+++ b/libraries/AP_Common/missing/endian.h
@@ -0,0 +1,16 @@
+#if defined(HAVE_ENDIAN_H) && HAVE_ENDIAN_H
+#include_next <endian.h>
+#else
+
+/* minimal version defining only the macros we need in our codebase */
+
+#define __LITTLE_ENDIAN  1234
+#define __BIG_ENDIAN     4321
+
+#ifdef __ARMEB__
+#define __BYTE_ORDER     __BIG_ENDIAN
+#else
+#define __BYTE_ORDER     __LITTLE_ENDIAN
+#endif
+
+#endif