bytes_bsd_zero.hpp

/*
 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

#ifndef OS_CPU_BSD_ZERO_BYTES_BSD_ZERO_HPP
#define OS_CPU_BSD_ZERO_BYTES_BSD_ZERO_HPP

// Efficient swapping of data bytes from Java byte
// ordering to native byte ordering and vice versa.

#ifdef __APPLE__
#  include <libkern/OSByteOrder.h>
#else
#  include <sys/endian.h>
#endif

#if defined(__APPLE__)
#  define bswap_16(x)   OSSwapInt16(x)
#  define bswap_32(x)   OSSwapInt32(x)
#  define bswap_64(x)   OSSwapInt64(x)
#elif defined(__OpenBSD__)
#  define bswap_16(x)   swap16(x)
#  define bswap_32(x)   swap32(x)
#  define bswap_64(x)   swap64(x)
#elif defined(__NetBSD__)
#  define bswap_16(x)   bswap16(x)
#  define bswap_32(x)   bswap32(x)
#  define bswap_64(x)   bswap64(x)
#else
#  define bswap_16(x) __bswap16(x)
#  define bswap_32(x) __bswap32(x)
#  define bswap_64(x) __bswap64(x)
#endif

inline u2 Bytes::swap_u2(u2 x) {
  return bswap_16(x);
}

inline u4 Bytes::swap_u4(u4 x) {
  return bswap_32(x);
}

inline u8 Bytes::swap_u8(u8 x) {
  return bswap_64(x);
}

#endif // OS_CPU_BSD_ZERO_BYTES_BSD_ZERO_HPP