From 07e18043145f3d91c8ea7ec3ad41b3c905585277 Mon Sep 17 00:00:00 2001
From: Ethan Werner <mail@ethanwerner.com>
Date: Wed, 1 Jul 2026 09:42:39 +0400
Subject: 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
---
 lib/ts.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100755 lib/ts.c

(limited to 'lib/ts.c')

diff --git a/lib/ts.c b/lib/ts.c
new file mode 100755
index 0000000..68e2f41
--- /dev/null
+++ b/lib/ts.c
@@ -0,0 +1,119 @@
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include "ts.h"
+
+
+fp_t * ts_fill( fp_t *x, uint_t n, fp_t x0, fp_t x1 )
+{
+	fp_t step = ( x1 - x0 ) / ( n - 1 );
+
+	if( x0 == 0.0 && x1 == 0.0 )
+	{
+		memset(x, 0, sizeof( fp_t ) * n );
+	}
+
+	else
+	{
+		for( uint_t i = 0; i < n; i++ )
+		{
+			x[i] = x0 + ( i * step );
+		}
+	}
+
+	return x;
+}
+
+
+void ts_print( fp_t *x, uint_t n )
+{
+    fputc('[', stdout);
+
+    uint_t i;
+    for( i = 0; i < n - 1; i++ )
+    {
+        fprintf(stdout, "%f,", x[i]);
+    }
+
+    fprintf(stdout, "%f]", x[i]);
+}
+
+
+void ts_pretty_print( fp_t const * const *x, uint_t m, uint_t n )
+{
+    if( m > 1 )
+    {
+        for( uint_t i = 0; i < n; i++ )
+        {
+            uint_t j = 0;
+            for( ; j < m; j++ )
+            {
+                fprintf( stdout, "%f  ", x[i][j] );
+            }
+
+            fputs( "\n", stdout );
+        }
+    }
+    else
+    {
+        for( uint_t i = 0; i < n; i++ )
+        {
+            fprintf( stdout, "%f\n", x[0][i] );
+        }
+    }
+}
+
+
+fp_t _ts_square( fp_t x )
+{
+    return x * x;
+}
+
+
+fp_t _ts_reciprocal( fp_t x )
+{
+    return x != 0 ? 1.0 / x : INFINITY;
+}
+
+
+fp_t _ts_square_pyramidal_number( fp_t x )
+{
+    return ( x * ( x + 1 ) * ( 2 * x + 1 ) ) / 6;
+}
+
+
+fp_t _ts_triangle_number( fp_t x )
+{
+    return ( ( x ) * ( ( x ) + 1 ) ) * 0.5;
+}
+
+
+fp_t _ts_sum_to_covariance( fp_t sum_xy, fp_t sum_x, fp_t sum_y, uint_t k )
+{
+    return ( sum_xy - ( sum_x * sum_y / k ) ) / k;
+}
+
+
+fp_t _ts_sum_to_variance( fp_t sum_x2, fp_t sum_x, uint_t k )
+{
+    return _ts_sum_to_covariance( sum_x2, sum_x, sum_x, k );
+}
+
+
+uint_t _ts_circle_increment( uint_t i, uint_t k )
+{
+    return ( i + 1 ) % k;
+}
+
+
+// ts_constant_t * ts_constant_init( uint_t n, ... )
+// {
+//     va_list args;
+//     va_start( args, n );
+
+//     for( uint_t i = 0; i < n; i++ )
+//     {
+
+//     }
+// }
\ No newline at end of file
-- 
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