First version of Threefish512-CTR with BLAKE3-MAC & a custom shamirs secret sharing port alongside C bridges with test vectors & Compilation instructions

crypto/shamirs_secret_sharing/include/cpython/floatobject.h

@@ -0,0 +1,27 @@
+#ifndef Py_CPYTHON_FLOATOBJECT_H
+#  error "this header file must not be included directly"
+#endif
+
+typedef struct {
+    PyObject_HEAD
+    double ob_fval;
+} PyFloatObject;
+
+#define _PyFloat_CAST(op) \
+    (assert(PyFloat_Check(op)), _Py_CAST(PyFloatObject*, op))
+
+// Static inline version of PyFloat_AsDouble() trading safety for speed.
+// It doesn't check if op is a double object.
+static inline double PyFloat_AS_DOUBLE(PyObject *op) {
+    return _PyFloat_CAST(op)->ob_fval;
+}
+#define PyFloat_AS_DOUBLE(op) PyFloat_AS_DOUBLE(_PyObject_CAST(op))
+
+
+PyAPI_FUNC(int) PyFloat_Pack2(double x, char *p, int le);
+PyAPI_FUNC(int) PyFloat_Pack4(double x, char *p, int le);
+PyAPI_FUNC(int) PyFloat_Pack8(double x, char *p, int le);
+
+PyAPI_FUNC(double) PyFloat_Unpack2(const char *p, int le);
+PyAPI_FUNC(double) PyFloat_Unpack4(const char *p, int le);
+PyAPI_FUNC(double) PyFloat_Unpack8(const char *p, int le);