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| Rev | Author | Line No. | Line |
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| 4680 | right-hear | 1 | /* |
| 2 | * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium |
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| 3 | * Copyright (c) 2002-2007, Professor Benoit Macq |
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| 4 | * Copyright (c) 2001-2003, David Janssens |
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| 5 | * Copyright (c) 2002-2003, Yannick Verschueren |
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| 6 | * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe |
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| 7 | * Copyright (c) 2005, Herve Drolon, FreeImage Team |
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| 8 | * All rights reserved. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
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| 20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 29 | * POSSIBILITY OF SUCH DAMAGE. |
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| 30 | */ |
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| 31 | #ifndef __FIX_H |
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| 32 | #define __FIX_H |
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| 33 | |||
| 34 | #if defined(_MSC_VER) || defined(__BORLANDC__) |
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| 35 | #define int64 __int64 |
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| 36 | #else |
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| 37 | #define int64 long long |
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| 38 | #endif |
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| 39 | |||
| 40 | /** |
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| 41 | @file fix.h |
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| 42 | @brief Implementation of operations of specific multiplication (FIX) |
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| 43 | |||
| 44 | The functions in FIX.H have for goal to realize specific multiplication. |
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| 45 | */ |
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| 46 | |||
| 47 | /** @defgroup FIX FIX - Implementation of operations of specific multiplication */ |
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| 48 | /*@{*/ |
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| 49 | |||
| 50 | /** |
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| 51 | Multiply two fixed-precision rational numbers. |
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| 52 | @param a |
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| 53 | @param b |
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| 54 | @return Returns a * b |
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| 55 | */ |
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| 56 | static INLINE int fix_mul(int a, int b) { |
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| 57 | int64 temp = (int64) a * (int64) b ; |
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| 58 | temp += temp & 4096; |
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| 59 | return (int) (temp >> 13) ; |
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| 60 | } |
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| 61 | |||
| 62 | /*@}*/ |
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| 63 | |||
| 64 | #endif /* __FIX_H */ |