draft for 25009

src/sage/libs/primecount.pxd

@@ -0,0 +1,23 @@
+# distutils: libraries = primecount
+# distutils: language = c++ 
+
+from libc.stdint cimport int64_t
+from libcpp.string cimport string as cppstring
+
+cdef extern from "primecount.hpp" namespace "primecount":
+    int64_t pi(int64_t x)
+    cppstring pi(const cppstring& x)
+    int64_t pi_deleglise_rivat(int64_t x)
+    int64_t pi_legendre(int64_t x)
+    int64_t pi_lehmer(int64_t x)
+    int64_t pi_lmo(int64_t x)
+    int64_t pi_meissel(int64_t x)
+    int64_t pi_primesieve(int64_t x)
+    int64_t nth_prime(int64_t n)
+    int64_t phi(int64_t x, int64_t a)
+
+    void set_num_threads(int num_threads)
+    int get_num_threads()
+
+
+