diff options
| author | Mathieu Malaterre <mathieu.malaterre@gmail.com> | 2012-09-28 08:32:34 +0000 |
|---|---|---|
| committer | Mathieu Malaterre <mathieu.malaterre@gmail.com> | 2012-09-28 08:32:34 +0000 |
| commit | 3e62f8d9b73f712f82e6d3d186f03a3e581bc465 (patch) | |
| tree | f58a87f0e972811123da8a2f8ebe4ae1aef9ad64 /src/lib/openjp3d/fix.h | |
| parent | 028720c9ec1a330728a2eb6fcd5faadef99cdeb9 (diff) | |
[trunk] FolderReorgProposal task: add JP3D
Update issue 177
Diffstat (limited to 'src/lib/openjp3d/fix.h')
| -rwxr-xr-x | src/lib/openjp3d/fix.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/openjp3d/fix.h b/src/lib/openjp3d/fix.h new file mode 100755 index 00000000..3b5e77ca --- /dev/null +++ b/src/lib/openjp3d/fix.h @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef __FIX_H +#define __FIX_H + +#if defined(_MSC_VER) || defined(__BORLANDC__) +#define int64 __int64 +#else +#define int64 long long +#endif + +/** +@file fix.h +@brief Implementation of operations of specific multiplication (FIX) + +The functions in FIX.H have for goal to realize specific multiplication. +*/ + +/** @defgroup FIX FIX - Implementation of operations of specific multiplication */ +/*@{*/ + +/** +Multiply two fixed-precision rational numbers. +@param a +@param b +@return Returns a * b +*/ +static int fix_mul(int a, int b) { + int64 temp = (int64) a * (int64) b >> 12; + return (int) ((temp >> 1) + (temp & 1)) ; +} + +/*@}*/ + +#endif /* __FIX_H */ |
