gh-106320: Remove private _PyLong_Sign() (#108743)

Move the private _PyLong_Sign() and _PyLong_NumBits() functions
to the internal C API (pycore_long.h).

Modules/_testcapi/long.c now uses the internal C API.

1 files changed, 17 insertions, 0 deletions

diff --git a/Include/internal/pycore_long.h b/Include/internal/pycore_long.h
index c411ac6..3c253ed 100644
--- a/Include/internal/pycore_long.h
+++ b/Include/internal/pycore_long.h
@@ -58,6 +58,23 @@ PyAPI_FUNC(PyLongObject*) _PyLong_FromDigits(
     Py_ssize_t digit_count,
     digit *digits);
 
+// _PyLong_Sign.  Return 0 if v is 0, -1 if v < 0, +1 if v > 0.
+// v must not be NULL, and must be a normalized long.
+// There are no error cases.
+//
+// Export for '_pickle' shared extension.
+PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
+
+// _PyLong_NumBits.  Return the number of bits needed to represent the
+// absolute value of a long.  For example, this returns 1 for 1 and -1, 2
+// for 2 and -2, and 2 for 3 and -3.  It returns 0 for 0.
+// v must not be NULL, and must be a normalized long.
+// (size_t)-1 is returned and OverflowError set if the true result doesn't
+// fit in a size_t.
+//
+// Export for 'math' shared extension.
+PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
+
 
 /* runtime lifecycle */