bpo-46848: Use stringlib/fastsearch in mmap (GH-31625)

Speed up mmap.find(). Add _PyBytes_Find() and _PyBytes_ReverseFind().

1 files changed, 18 insertions, 0 deletions

diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 3d8a21696d1..4c67b8f7af2 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -1247,6 +1247,24 @@ PyBytes_AsStringAndSize(PyObject *obj,
 
 #undef STRINGLIB_GET_EMPTY
 
+Py_ssize_t
+_PyBytes_Find(const char *haystack, Py_ssize_t len_haystack,
+              const char *needle, Py_ssize_t len_needle,
+              Py_ssize_t offset)
+{
+    return stringlib_find(haystack, len_haystack,
+                          needle, len_needle, offset);
+}
+
+Py_ssize_t
+_PyBytes_ReverseFind(const char *haystack, Py_ssize_t len_haystack,
+                     const char *needle, Py_ssize_t len_needle,
+                     Py_ssize_t offset)
+{
+    return stringlib_rfind(haystack, len_haystack,
+                           needle, len_needle, offset);
+}
+
 PyObject *
 PyBytes_Repr(PyObject *obj, int smartquotes)
 {