lib/missing_bar_count.c


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// Missing Bar Count
//
// missing_bar_count
//
// Missing bar counter
//
// Counts consecutive missing data bars
//
// Inputs:    1
// Outputs:   1
// Constants: 1


#include <math.h>
#include "ts.h"

typedef struct {
    fp_t threshold;
} ts_missing_bar_count_params_t;

ts_parameter_t const ts_missing_bar_count_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 1, .params_size = sizeof(ts_missing_bar_count_params_t) };

uint_t ts_missing_bar_count_offset( ts_constant_t const *c )
{
	( void )c;
	return ( 0 );
}

int ts_missing_bar_count(
	fp_t * const *y, uint_t y_n,
	fp_t const * const *x, uint_t x_n,
	uint_t n, ts_constant_t const *c
)
{
	TS_PROLOGUE( ts_missing_bar_count_p );
	if ( !c ) return -1;
	if (n == 0) return -1;
	fp_t threshold = ((ts_missing_bar_count_params_t *)c)->threshold;

	y[0][0] = 0;

	for( uint_t i = 1; i < n; ++i )
	{
		if( fabs( x[0][i] - x[0][i - 1] ) < threshold )
			y[0][i] = y[0][i - 1] + 1;
		else
			y[0][i] = 0;
	}
	return 0;
}