Initial LsPower implementation

.venv/Lib/site-packages/numpy/random/_bounded_integers.pxd

@@ -0,0 +1,38 @@
+from libc.stdint cimport (uint8_t, uint16_t, uint32_t, uint64_t,
+
+                          int8_t, int16_t, int32_t, int64_t, intptr_t)
+
+import numpy as np
+
+cimport numpy as np
+
+ctypedef np.npy_bool bool_t
+
+
+
+from numpy.random cimport bitgen_t
+
+
+
+cdef inline uint64_t _gen_mask(uint64_t max_val) noexcept nogil:
+
+    """Mask generator for use in bounded random numbers"""
+
+    # Smallest bit mask >= max
+
+    cdef uint64_t mask = max_val
+
+    mask |= mask >> 1
+
+    mask |= mask >> 2
+
+    mask |= mask >> 4
+
+    mask |= mask >> 8
+
+    mask |= mask >> 16
+
+    mask |= mask >> 32
+
+    return mask
+