bimg/3rdparty/iqa/include/iqa_os.h

/*
 * Copyright (c) 2011, Tom Distler (http://tdistler.com)
 * All rights reserved.
 *
 * The BSD License
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 *
 * - 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.
 *
 * - Neither the name of the tdistler.com nor the names of its contributors may
 *   be used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * 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 HOLDER 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 _OS_H_
#define _OS_H_

/* Microsoft tends to implement features early, but they have a high legacy
 * cost because they won't break existing implementations. As such, certain
 * features we take for granted on other platforms (like C99) aren't fully
 * implemented. This file is meant to rectify that.
 */

#ifdef WIN32

#include <windows.h>
#include <math.h>

#define IQA_INLINE __inline

#ifndef INFINITY
    #define INFINITY (float)HUGE_VAL /**< Defined in C99 (Windows is C89) */
#endif /*INFINITY*/

#ifndef NAN
    static const unsigned long __nan[2] = {0xffffffff, 0x7fffffff};
    #define NAN (*(const float *) __nan) /**< Defined in C99 (Windows is C99) */
#endif

#define IQA_EXPORT __declspec(dllexport)

#else /* !Windows */

#define IQA_INLINE inline
#define IQA_EXPORT

#endif

#endif /* _OS_H_ */