Move net/base/sys_byteorder.h to base/sys_byteorder.h

base/sys_byteorder.h

+// Copyright (c) 2011 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.
+
+// This is a convenience header to pull in the platform-specific
+// headers that define functions for byte-order conversion,
+// particularly: ntohs(), htons(), ntohl(), htonl(). Prefer including
+// this file instead of directly writing the #if / #else, since it
+// avoids duplicating the platform-specific selections.
+// This header also provides ntoh_64() and hton_64() for byte-order conversion
+// for 64-bit integers.
+
+#ifndef NET_BASE_SYS_BYTEORDER_H_
+#define NET_BASE_SYS_BYTEORDER_H_

[Ryan Sleevi, 2011/12/21 02:18:38]

nit: NET_BASE_SYS_BYTEORDER_H_ -> BASE_SYS_BYTEORDER_H_

[Ilya Sherman, 2011/12/21 02:22:13]

Done.

+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <winsock2.h>
+#else
+#include <arpa/inet.h>
+#endif
+
+// Include headers to provide bswap for all platforms.
+#if defined(COMPILER_MSVC)
+#include <stdlib.h>
+#define bswap_16(x) _byteswap_ushort(x)
+#define bswap_32(x) _byteswap_ulong(x)
+#define bswap_64(x) _byteswap_uint64(x)
+#elif defined(OS_MACOSX)
+#include <libkern/OSByteOrder.h>
+#define bswap_16(x) OSSwapInt16(x)
+#define bswap_32(x) OSSwapInt32(x)
+#define bswap_64(x) OSSwapInt64(x)
+#elif defined(OS_OPENBSD)
+#include <sys/endian.h>
+#define bswap_16(x) swap16(x)
+#define bswap_32(x) swap32(x)
+#define bswap_64(x) swap64(x)
+#else
+#include <byteswap.h>
+#endif
+
+#if defined(ARCH_CPU_LITTLE_ENDIAN)
+#define ntoh_64(x) bswap_64(x)
+#define hton_64(x) bswap_64(x)
+#else
+#define ntoh_64(x) (x)
+#define hton_64(x) (x)
+#endif
+
+#endif  // NET_BASE_SYS_BYTEORDER_H_