initial commit: ts time series analysis library v0.1.0

- 354 financial and mathematical time-series indicators
- Uniform C11 API with consistent function signatures
- 349 passing tests with -Werror
- Static and shared library builds
- pkg-config integration
- Python bindings
- Fuzzing and sanitizer support
- Security hardening flags

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/prime_number_oscillator.c b/lib/prime_number_oscillator.c
new file mode 100644
index 0000000..a86fa7b
--- /dev/null
+++ b/lib/prime_number_oscillator.c
@@ -0,0 +1,82 @@
+// Prime Number Oscillator
+//
+// prime_number_oscillator
+//
+// Prime Number Oscillator
+//
+// 
+//
+// Inputs:    1
+// Outputs:   1
+// Constants: 0
+
+
+#include "ts.h"
+
+
+ts_parameter_t const ts_prime_number_oscillator_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 };
+
+uint_t ts_prime_number_oscillator_offset( ts_constant_t const *c )
+{
+	( void )c;
+	return ( 23 );
+}
+
+int ts_prime_number_oscillator(
+	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_prime_number_oscillator_p );
+	(void)c;
+    fp_t last_gap = 0;
+    fp_t prev_prime = 0;
+    bool first_prime = true;
+
+    for( uint_t i = 0; i < n; ++i )
+    {
+        long v = (long)x[0][i];
+        bool is_p = false;
+
+        if( v >= 2 )
+        {
+            if( v == 2 )
+                is_p = true;
+            else if( v % 2 != 0 )
+            {
+                is_p = true;
+                for( long d = 3; d <= v / d; d += 2 )
+                {
+                    if( v % d == 0 )
+                    {
+                        is_p = false;
+                        break;
+                    }
+                }
+            }
+        }
+
+        if( is_p )
+        {
+            if( first_prime )
+            {
+                prev_prime = (fp_t)v;
+                first_prime = false;
+                y[0][i] = 0;
+            }
+            else
+            {
+                last_gap = (fp_t)v - prev_prime;
+                prev_prime = (fp_t)v;
+                y[0][i] = last_gap;
+            }
+        }
+        else
+        {
+            y[0][i] = last_gap;
+        }
+    }
+	return 0;
+}
+