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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// This file contains helper macros and definitions.
#ifndef LOCATION_LBS_CONTEXTHUB_NANOAPPS_COMMON_MATH_MACROS_H_
#define LOCATION_LBS_CONTEXTHUB_NANOAPPS_COMMON_MATH_MACROS_H_
// Mathematical constants.
#define NANO_PI (3.14159265359f)
// Common math operations.
#define NANO_ABS(x) ((x) > 0 ? (x) : -(x))
#define NANO_MAX(a, b) ((a) > (b)) ? (a) : (b)
#define NANO_MIN(a, b) ((a) < (b)) ? (a) : (b)
// Timestamp conversion macros.
#ifdef __cplusplus
#define MSEC_TO_NANOS(x) (static_cast<uint64_t>(x) * 1000000)
#else
#define MSEC_TO_NANOS(x) ((uint64_t)(x) * 1000000) // NOLINT
#endif
#define SEC_TO_NANOS(x) MSEC_TO_NANOS(x * 1000)
#define MIN_TO_NANOS(x) SEC_TO_NANOS(x * 60)
#define HRS_TO_NANOS(x) MIN_TO_NANOS(x * 60)
#define DAYS_TO_NANOS(x) HRS_TO_NANOS(x * 24)
// Unit conversion: nanoseconds to seconds.
#define NANOS_TO_SEC (1.0e-9f)
// Unit conversion: milli-degrees to radians.
#define MDEG_TO_RAD (NANO_PI / 180.0e3f)
// Unit conversion: radians to milli-degrees.
#define RAD_TO_MDEG (180.0e3f / NANO_PI)
// Time check helper macro that returns true if:
// i. 't1' is equal to or exceeds 't2' plus 't_delta'.
// ii. Or, a negative timestamp delta occurred since,
// 't1' should always >= 't2'. This prevents potential lockout conditions
// if the timer count 't1' rolls over or an erroneously large
// timestamp is passed through.
#define NANO_TIMER_CHECK_T1_GEQUAL_T2_PLUS_DELTA(t1, t2, t_delta) \
(((t1) >= (t2) + (t_delta)) || ((t1) < (t2)))
#endif // LOCATION_LBS_CONTEXTHUB_NANOAPPS_COMMON_MATH_MACROS_H_
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