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Diffstat (limited to 'extern/libopenjpeg/int.h')
-rw-r--r-- | extern/libopenjpeg/int.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/extern/libopenjpeg/int.h b/extern/libopenjpeg/int.h new file mode 100644 index 00000000000..4e5fe08eb76 --- /dev/null +++ b/extern/libopenjpeg/int.h @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium + * Copyright (c) 2002-2007, Professor Benoit Macq + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * 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 __INT_H +#define __INT_H +/** +@file int.h +@brief Implementation of operations on integers (INT) + +The functions in INT.H have for goal to realize operations on integers. +*/ + +/** @defgroup INT INT - Implementation of operations on integers */ +/*@{*/ + +/** @name Exported functions (see also openjpeg.h) */ +/*@{*/ +/* ----------------------------------------------------------------------- */ +/** +Get the minimum of two integers +@return Returns a if a < b else b +*/ +static INLINE int int_min(int a, int b) { + return a < b ? a : b; +} +/** +Get the maximum of two integers +@return Returns a if a > b else b +*/ +static INLINE int int_max(int a, int b) { + return (a > b) ? a : b; +} +/** +Clamp an integer inside an interval +@return +<ul> +<li>Returns a if (min < a < max) +<li>Returns max if (a > max) +<li>Returns min if (a < min) +</ul> +*/ +static INLINE int int_clamp(int a, int min, int max) { + if (a < min) + return min; + if (a > max) + return max; + return a; +} +/** +@return Get absolute value of integer +*/ +static INLINE int int_abs(int a) { + return a < 0 ? -a : a; +} +/** +Divide an integer and round upwards +@return Returns a divided by b +*/ +static INLINE int int_ceildiv(int a, int b) { + return (a + b - 1) / b; +} +/** +Divide an integer by a power of 2 and round upwards +@return Returns a divided by 2^b +*/ +static INLINE int int_ceildivpow2(int a, int b) { + return (a + (1 << b) - 1) >> b; +} +/** +Divide an integer by a power of 2 and round downwards +@return Returns a divided by 2^b +*/ +static INLINE int int_floordivpow2(int a, int b) { + return a >> b; +} +/** +Get logarithm of an integer and round downwards +@return Returns log2(a) +*/ +static INLINE int int_floorlog2(int a) { + int l; + for (l = 0; a > 1; l++) { + a >>= 1; + } + return l; +} +/* ----------------------------------------------------------------------- */ +/*@}*/ + +/*@}*/ + +#endif |