Adds htonl, htons, ntohl, and ntohs to newlib

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

Index: native_client_sdk/src/libraries/nacl_io/syscalls/ntohl.c
diff --git a/native_client_sdk/src/libraries/nacl_io/syscalls/ntohl.c b/native_client_sdk/src/libraries/nacl_io/syscalls/ntohl.c
new file mode 100644
index 0000000000000000000000000000000000000000..2d69be6d25233a5ab12ddefbfd712c82450c2a62
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/syscalls/ntohl.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 uint32_t ntohl(uint32_t networklong) {
+  uint8_t input[4];
+  memcpy(input, &networklong, 4);
+
+  return ((((uint32_t) input[0]) << 24) |
+          (((uint32_t) input[1]) << 16) |
+          (((uint32_t) input[2]) << 8) |
+          ((uint32_t) input[3]));
+}
+
+#endif  /* defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__) */