shared/helpers.h

/*
 * Copyright © 2015 Samsung Electronics Co., Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
  *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef WESTON_HELPERS_H
#define WESTON_HELPERS_H

#ifdef  __cplusplus
extern "C" {
#endif

/**
 * @file
 * Simple misc helper macros.
 */

/**
 * Compile-time computation of number of items in a hardcoded array.
 *
 * @param a the array being measured.
 * @return the number of items hardcoded into the array.
 */
#ifndef ARRAY_LENGTH
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
#endif

/**
 * Returns the smaller of two values.
 *
 * @param x the first item to compare.
 * @param y the second item to compare.
 * @return the value that evaluates to lesser than the other.
 */
#ifndef MIN
#define MIN(x,y) (((x) < (y)) ? (x) : (y))
#endif

#ifdef  __cplusplus
}
#endif

#endif /* WESTON_HELPERS_H */