libctf: opening

[deliverable/binutils-gdb.git] / libctf / swap.h

diff --git a/libctf/swap.h b/libctf/swap.h
new file mode 100644 (file)
index 0000000..06a9330
--- /dev/null
+++ b/libctf/swap.h
@@ -0,0 +1,60 @@
+/* Interface to byteswapping functions.
+   Copyright (C) 2006-2019 Free Software Foundation, Inc.
+
+   This file is part of libctf.
+
+   libctf is free software; you can redistribute it and/or modify it under
+   the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 3, or (at your option) any later
+   version.
+
+   This program 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _CTF_SWAP_H
+#define _CTF_SWAP_H
+
+#include "config.h"
+#include <stdint.h>
+
+#ifdef HAVE_BYTESWAP_H
+#include <byteswap.h>
+#else
+
+/* Provide our own versions of the byteswap functions.  */
+inline uint16_t
+bswap_16(uint16_t v)
+{
+  return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
+}
+
+inline uint32_t
+bswap_32(uint32_t v)
+{
+  return (  ((v & 0xff000000) >> 24)
+         | ((v & 0x00ff0000) >>  8)
+         | ((v & 0x0000ff00) <<  8)
+         | ((v & 0x000000ff) << 24));
+}
+
+inline uint64_t
+bswap_64(uint64_t v)
+{
+  return (  ((v & 0xff00000000000000ULL) >> 56)
+         | ((v & 0x00ff000000000000ULL) >> 40)
+         | ((v & 0x0000ff0000000000ULL) >> 24)
+         | ((v & 0x000000ff00000000ULL) >>  8)
+         | ((v & 0x00000000ff000000ULL) <<  8)
+         | ((v & 0x0000000000ff0000ULL) << 24)
+         | ((v & 0x000000000000ff00ULL) << 40)
+         | ((v & 0x00000000000000ffULL) << 56));
+}
+#endif /* !defined(HAVE_BYTESWAP_H) */
+
+#endif /* !defined(_CTF_SWAP_H) */