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authorArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
committerArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
commit3e4d8f433239c40311037616b1b8833a06651ae0 (patch)
tree98ab7fce0d011d34677b0beb762d389cb5c39199 /lzo/src/lzo_ptr.c
Initial import
Diffstat (limited to 'lzo/src/lzo_ptr.c')
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diff --git a/lzo/src/lzo_ptr.c b/lzo/src/lzo_ptr.c
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+/* lzo_ptr.c -- low-level pointer constructs
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ The LZO library 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 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library 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 the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ Markus F.X.J. Oberhumer
+ <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+ */
+
+
+#include "lzo_conf.h"
+
+
+/***********************************************************************
+//
+************************************************************************/
+
+LZO_PUBLIC(lzo_uintptr_t)
+__lzo_ptr_linear(const lzo_voidp ptr)
+{
+ lzo_uintptr_t p;
+
+#if (LZO_ARCH_I086)
+ p = (((lzo_uintptr_t)(ACC_PTR_FP_SEG(ptr))) << (16 - ACC_MM_AHSHIFT)) + (ACC_PTR_FP_OFF(ptr));
+#elif (LZO_MM_PVP)
+ p = (lzo_uintptr_t) (ptr);
+ p = (p << 3) | (p >> 61);
+#else
+ p = (lzo_uintptr_t) PTR_LINEAR(ptr);
+#endif
+
+ return p;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+
+LZO_PUBLIC(unsigned)
+__lzo_align_gap(const lzo_voidp ptr, lzo_uint size)
+{
+#if defined(__LZO_UINTPTR_T_IS_POINTER)
+ size_t n = (size_t) ptr;
+ n = (((n + size - 1) / size) * size) - n;
+#else
+ lzo_uintptr_t p, n;
+ p = __lzo_ptr_linear(ptr);
+ n = (((p + size - 1) / size) * size) - p;
+#endif
+
+ assert(size > 0);
+ assert((long)n >= 0);
+ assert(n <= size);
+ return (unsigned)n;
+}
+
+
+
+/*
+vi:ts=4:et
+*/