Adds htonl, htons, ntohl, and ntohs to newlib

native_client_sdk/src/libraries/nacl_io/syscalls/htons.c

Index: native_client_sdk/src/libraries/nacl_io/syscalls/htons.c
diff --git a/native_client_sdk/src/libraries/nacl_io/syscalls/htons.c b/native_client_sdk/src/libraries/nacl_io/syscalls/htons.c
new file mode 100644
index 0000000000000000000000000000000000000000..2c337fca02ae3c76ba558d8ca22d2f9d6df2e40b
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/syscalls/htons.c
@@ -0,0 +1,21 @@
+/* Copyright (c) 2013 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+#include "nacl_io/ossocket.h"
+
+#if defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__)
+
+#include <string.h>
+
+inline uint16_t htons(uint16_t hostshort) {
+  uint8_t result_bytes[2];
+  result_bytes[0] = (uint8_t) ((hostshort >> 8) & 0xFF);
+  result_bytes[1] = (uint8_t) (hostshort & 0xFF);
+
+  uint16_t result;
+  memcpy(&result, result_bytes, 2);
+  return result;
+}
+
+#endif  /* defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__) */