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Diffstat (limited to 'libraries/openjpeg-libsl/libopenjpeg/int.h')
-rw-r--r-- | libraries/openjpeg-libsl/libopenjpeg/int.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libraries/openjpeg-libsl/libopenjpeg/int.h b/libraries/openjpeg-libsl/libopenjpeg/int.h new file mode 100644 index 0000000..4e5fe08 --- /dev/null +++ b/libraries/openjpeg-libsl/libopenjpeg/int.h | |||
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1 | /* | ||
2 | * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium | ||
3 | * Copyright (c) 2002-2007, Professor Benoit Macq | ||
4 | * Copyright (c) 2001-2003, David Janssens | ||
5 | * Copyright (c) 2002-2003, Yannick Verschueren | ||
6 | * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe | ||
7 | * Copyright (c) 2005, Herve Drolon, FreeImage Team | ||
8 | * All rights reserved. | ||
9 | * | ||
10 | * Redistribution and use in source and binary forms, with or without | ||
11 | * modification, are permitted provided that the following conditions | ||
12 | * are met: | ||
13 | * 1. Redistributions of source code must retain the above copyright | ||
14 | * notice, this list of conditions and the following disclaimer. | ||
15 | * 2. Redistributions in binary form must reproduce the above copyright | ||
16 | * notice, this list of conditions and the following disclaimer in the | ||
17 | * documentation and/or other materials provided with the distribution. | ||
18 | * | ||
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' | ||
20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
29 | * POSSIBILITY OF SUCH DAMAGE. | ||
30 | */ | ||
31 | #ifndef __INT_H | ||
32 | #define __INT_H | ||
33 | /** | ||
34 | @file int.h | ||
35 | @brief Implementation of operations on integers (INT) | ||
36 | |||
37 | The functions in INT.H have for goal to realize operations on integers. | ||
38 | */ | ||
39 | |||
40 | /** @defgroup INT INT - Implementation of operations on integers */ | ||
41 | /*@{*/ | ||
42 | |||
43 | /** @name Exported functions (see also openjpeg.h) */ | ||
44 | /*@{*/ | ||
45 | /* ----------------------------------------------------------------------- */ | ||
46 | /** | ||
47 | Get the minimum of two integers | ||
48 | @return Returns a if a < b else b | ||
49 | */ | ||
50 | static INLINE int int_min(int a, int b) { | ||
51 | return a < b ? a : b; | ||
52 | } | ||
53 | /** | ||
54 | Get the maximum of two integers | ||
55 | @return Returns a if a > b else b | ||
56 | */ | ||
57 | static INLINE int int_max(int a, int b) { | ||
58 | return (a > b) ? a : b; | ||
59 | } | ||
60 | /** | ||
61 | Clamp an integer inside an interval | ||
62 | @return | ||
63 | <ul> | ||
64 | <li>Returns a if (min < a < max) | ||
65 | <li>Returns max if (a > max) | ||
66 | <li>Returns min if (a < min) | ||
67 | </ul> | ||
68 | */ | ||
69 | static INLINE int int_clamp(int a, int min, int max) { | ||
70 | if (a < min) | ||
71 | return min; | ||
72 | if (a > max) | ||
73 | return max; | ||
74 | return a; | ||
75 | } | ||
76 | /** | ||
77 | @return Get absolute value of integer | ||
78 | */ | ||
79 | static INLINE int int_abs(int a) { | ||
80 | return a < 0 ? -a : a; | ||
81 | } | ||
82 | /** | ||
83 | Divide an integer and round upwards | ||
84 | @return Returns a divided by b | ||
85 | */ | ||
86 | static INLINE int int_ceildiv(int a, int b) { | ||
87 | return (a + b - 1) / b; | ||
88 | } | ||
89 | /** | ||
90 | Divide an integer by a power of 2 and round upwards | ||
91 | @return Returns a divided by 2^b | ||
92 | */ | ||
93 | static INLINE int int_ceildivpow2(int a, int b) { | ||
94 | return (a + (1 << b) - 1) >> b; | ||
95 | } | ||
96 | /** | ||
97 | Divide an integer by a power of 2 and round downwards | ||
98 | @return Returns a divided by 2^b | ||
99 | */ | ||
100 | static INLINE int int_floordivpow2(int a, int b) { | ||
101 | return a >> b; | ||
102 | } | ||
103 | /** | ||
104 | Get logarithm of an integer and round downwards | ||
105 | @return Returns log2(a) | ||
106 | */ | ||
107 | static INLINE int int_floorlog2(int a) { | ||
108 | int l; | ||
109 | for (l = 0; a > 1; l++) { | ||
110 | a >>= 1; | ||
111 | } | ||
112 | return l; | ||
113 | } | ||
114 | /* ----------------------------------------------------------------------- */ | ||
115 | /*@}*/ | ||
116 | |||
117 | /*@}*/ | ||
118 | |||
119 | #endif | ||