tests_common.cpp
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/****************************************************************************
*
* Copyright (c) 2019 Todd Stellanova. 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.
* 3. Neither the name of the copyright holder 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 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.
*
****************************************************************************/
#include <stdio.h>
#include "tests_common.h"
void insert_values_around_mean(DataValidator *validator, const float mean, uint32_t count, float *rms_err,
uint64_t *timestamp_io)
{
uint64_t timestamp = *timestamp_io;
uint64_t timestamp_incr = 5;
const uint32_t error_count = 0;
const uint8_t priority = 50;
const float swing = 1E-2f;
double sum_dev_squares = 0.0f;
//insert a series of values that swing around the mean
for (uint32_t i = 0; i < count; i++) {
float iter_swing = (0 == (i % 2)) ? swing : -swing;
float iter_val = mean + iter_swing;
float iter_dev = iter_val - mean;
sum_dev_squares += (iter_dev * iter_dev);
timestamp += timestamp_incr;
validator->put(timestamp, iter_val, error_count, priority);
}
double rms = sqrt(sum_dev_squares / (double)count);
//note: this should be approximately equal to "swing"
*rms_err = (float)rms;
*timestamp_io = timestamp;
}
void dump_validator_state(DataValidator *validator)
{
uint32_t state = validator->state();
printf("state: 0x%x no_data: %d stale: %d timeout:%d\n",
validator->state(),
DataValidator::ERROR_FLAG_NO_DATA & state,
DataValidator::ERROR_FLAG_STALE_DATA & state,
DataValidator::ERROR_FLAG_TIMEOUT & state
);
validator->print();
printf("\n");
}
void fill_validator_with_samples(DataValidator *validator,
const float incr_value,
float *value_io,
uint64_t *timestamp_io)
{
uint64_t timestamp = *timestamp_io;
const uint64_t timestamp_incr = 5; //usec
const uint32_t timeout_usec = 2000;//derived from class-private value
float val = *value_io;
const uint32_t error_count = 0;
const uint8_t priority = 50; //"medium" priority
const int equal_value_count = 100; //default is private VALUE_EQUAL_COUNT_DEFAULT
validator->set_equal_value_threshold(equal_value_count);
validator->set_timeout(timeout_usec);
//put a bunch of values that are all different
for (int i = 0; i < equal_value_count; i++, val += incr_value) {
timestamp += timestamp_incr;
validator->put(timestamp, val, error_count, priority);
}
*timestamp_io = timestamp;
*value_io = val;
}