1 files changed, 51 insertions, 0 deletions
diff --git a/lib/missing_bar_count.c b/lib/missing_bar_count.c
new file mode 100644
index 0000000..e6f548e
--- /dev/null
+++ b/lib/missing_bar_count.c
@@ -0,0 +1,51 @@
+// 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;
+}
+