.

src/hos_libhttpserver/src/libgcrypt/cipher/bithelp.h

@@ -0,0 +1,80 @@
+/* bithelp.h  -  Some bit manipulation helpers
+ *	Copyright (C) 1999, 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser general Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+#ifndef G10_BITHELP_H
+#define G10_BITHELP_H
+
+#include "types.h"
+
+
+/****************
+ * Rotate the 32 bit unsigned integer X by N bits left/right
+ */
+static inline u32 rol(u32 x, int n)
+{
+	return ( (x << (n&(32-1))) | (x >> ((32-n)&(32-1))) );
+}
+
+static inline u32 ror(u32 x, int n)
+{
+	return ( (x >> (n&(32-1))) | (x << ((32-n)&(32-1))) );
+}
+
+/* Byte swap for 32-bit and 64-bit integers.  If available, use compiler
+   provided helpers.  */
+#ifdef HAVE_BUILTIN_BSWAP32
+# define _gcry_bswap32 __builtin_bswap32
+#else
+static inline u32
+_gcry_bswap32(u32 x)
+{
+	return ((rol(x, 8) & 0x00ff00ffL) | (ror(x, 8) & 0xff00ff00L));
+}
+#endif
+
+#ifdef HAVE_U64_TYPEDEF
+# ifdef HAVE_BUILTIN_BSWAP64
+#  define _gcry_bswap64 __builtin_bswap64
+# else
+static inline u64
+_gcry_bswap64(u64 x)
+{
+	return ((u64)_gcry_bswap32(x) << 32) | (_gcry_bswap32(x >> 32));
+}
+# endif
+#endif
+
+/* Endian dependent byte swap operations.  */
+#ifdef WORDS_BIGENDIAN
+# define le_bswap32(x) _gcry_bswap32(x)
+# define be_bswap32(x) ((u32)(x))
+# ifdef HAVE_U64_TYPEDEF
+#  define le_bswap64(x) _gcry_bswap64(x)
+#  define be_bswap64(x) ((u64)(x))
+# endif
+#else
+# define le_bswap32(x) ((u32)(x))
+# define be_bswap32(x) _gcry_bswap32(x)
+# ifdef HAVE_U64_TYPEDEF
+#  define le_bswap64(x) ((u64)(x))
+#  define be_bswap64(x) _gcry_bswap64(x)
+# endif
+#endif
+
+#endif /*G10_BITHELP_H*/