1 files changed, 22 insertions, 34 deletions

diff --git a/Objects/stringlib/find.h b/Objects/stringlib/find.h
index bf27d6a5cf6..f915296cae6 100644
--- a/Objects/stringlib/find.h
+++ b/Objects/stringlib/find.h
@@ -19,7 +19,7 @@ stringlib_find(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
     if (sub_len == 0)
         return offset;
 
-    pos = fastsearch(str, str_len, sub, sub_len, FAST_SEARCH);
+    pos = fastsearch(str, str_len, sub, sub_len, -1, FAST_SEARCH);
 
     if (pos >= 0)
         pos += offset;
@@ -39,7 +39,7 @@ stringlib_rfind(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
     if (sub_len == 0)
         return str_len + offset;
 
-    pos = fastsearch(str, str_len, sub, sub_len, FAST_RSEARCH);
+    pos = fastsearch(str, str_len, sub, sub_len, -1, FAST_RSEARCH);
 
     if (pos >= 0)
         pos += offset;
@@ -47,22 +47,27 @@ stringlib_rfind(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
     return pos;
 }
 
+/* helper macro to fixup start/end slice values */
+#define ADJUST_INDICES(start, end, len)         \
+    if (end > len)                              \
+        end = len;                              \
+    else if (end < 0) {                         \
+        end += len;                             \
+        if (end < 0)                            \
+            end = 0;                            \
+    }                                           \
+    if (start < 0) {                            \
+        start += len;                           \
+        if (start < 0)                          \
+            start = 0;                          \
+    }
+
 Py_LOCAL_INLINE(Py_ssize_t)
 stringlib_find_slice(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
                      const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
                      Py_ssize_t start, Py_ssize_t end)
 {
-    if (start < 0)
-        start += str_len;
-    if (start < 0)
-        start = 0;
-    if (end > str_len)
-        end = str_len;
-    if (end < 0)
-        end += str_len;
-    if (end < 0)
-        end = 0;
-
+    ADJUST_INDICES(start, end, str_len);
     return stringlib_find(str + start, end - start, sub, sub_len, start);
 }
 
@@ -71,17 +76,7 @@ stringlib_rfind_slice(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
                       const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
                       Py_ssize_t start, Py_ssize_t end)
 {
-    if (start < 0)
-        start += str_len;
-    if (start < 0)
-        start = 0;
-    if (end > str_len)
-        end = str_len;
-    if (end < 0)
-        end += str_len;
-    if (end < 0)
-        end = 0;
-
+    ADJUST_INDICES(start, end, str_len);
     return stringlib_rfind(str + start, end - start, sub, sub_len, start);
 }
 
@@ -96,9 +91,9 @@ stringlib_contains_obj(PyObject* str, PyObject* sub)
         ) != -1;
 }
 
-#endif /* STRINGLIB_STR */
+#endif /* STRINGLIB_WANT_CONTAINS_OBJ */
 
-#ifdef FROM_UNICODE
+#if STRINGLIB_IS_UNICODE
 
 /*
 This function is a helper for the "find" family (find, rfind, index,
@@ -146,13 +141,6 @@ _ParseTupleFinds (PyObject *args, PyObject **substring,
     return 1;
 }
 
-#endif /* FROM_UNICODE */
+#endif /* STRINGLIB_IS_UNICODE */
 
 #endif /* STRINGLIB_FIND_H */
-
-/*
-Local variables:
-c-basic-offset: 4
-indent-tabs-mode: nil
-End:
-*/