osMath.h

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TDENGINE_OS_MATH_H
#define TDENGINE_OS_MATH_H

#ifdef __cplusplus
extern "C" {
#endif

#define POW2(x) ((x) * (x))
#define ABS(x) ((x) > 0 ? (x) : -(x))

#ifndef TAOS_OS_FUNC_MATH
  #define SWAP(a, b, c)        \
    do {                       \
        typeof(a) __tmp = (a); \
        (a) = (b);             \
        (b) = __tmp;           \
    } while (0)

  #define MAX(a, b)              \
    ({                           \
        typeof(a) __a = (a);     \
        typeof(b) __b = (b);     \
        (__a > __b) ? __a : __b; \
    })

  #define MIN(a, b)              \
    ({                           \
        typeof(a) __a = (a);     \
        typeof(b) __b = (b);     \
        (__a < __b) ? __a : __b; \
    })
#endif

#ifdef __cplusplus
}
#endif

#endif