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, 50 insertions, 0 deletions

diff --git a/lib/gcd.c b/lib/gcd.c
new file mode 100644
index 0000000..44068cf
--- /dev/null
+++ b/lib/gcd.c
@@ -0,0 +1,50 @@
+// Gcd
+//
+// gcd
+//
+// Greatest common divisor
+//
+// gcd(a, b) via Euclidean algorithm
+//
+// Inputs:    2
+// Outputs:   1
+// Constants: 0
+
+
+#include <math.h>
+#include "ts.h"
+
+
+ts_parameter_t const ts_gcd_p = { .n_inputs = 2, .n_outputs = 1, .n_constants = 0, .params_size = 0 };
+
+uint_t ts_gcd_offset( ts_constant_t const *c )
+{
+	( void )c;
+	return ( 0 );
+}
+
+int ts_gcd(
+	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_gcd_p );
+	(void)c;
+    for( uint_t i = 0; i < n; ++i )
+    {
+        long a = (long)fabs(x[0][i]);
+        long b = (long)fabs(x[1][i]);
+        while( b )
+        {
+            long t = b;
+            b = a % b;
+            a = t;
+        }
+        y[0][i] = (fp_t)a;
+    }
+	return 0;
+}
+
+
+