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Diffstat (limited to 'main/lzo/src/lzo_ptr.c')
-rw-r--r-- | main/lzo/src/lzo_ptr.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/main/lzo/src/lzo_ptr.c b/main/lzo/src/lzo_ptr.c new file mode 100644 index 00000000..46e6e353 --- /dev/null +++ b/main/lzo/src/lzo_ptr.c @@ -0,0 +1,95 @@ +/* lzo_ptr.c -- low-level pointer constructs + + This file is part of the LZO real-time data compression library. + + Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer + 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 +*/ |