Fix a recent change in coding.c

This partially reverts the changes in "extern function cleanup".
* src/coding.c (encode_string_utf_8, decode_string_utf_8): Now
extern again.  They should NOT be static, as they are intended
to be used by the likes of json.c, where we need
highly-optimized code for processing UTF-8 strings.  E.g.,
decode_string_utf_8 beats make_string_from_utf8 by a factor of
2 to 5 in a large number of scenarios.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/coding.h b/src/coding.h
index 70690d42d30..8efddbf55c4 100644
--- a/src/coding.h
+++ b/src/coding.h
@@ -689,6 +689,10 @@ extern Lisp_Object code_convert_string (Lisp_Object, Lisp_Object,
                                         Lisp_Object, bool, bool, bool);
 extern Lisp_Object code_convert_string_norecord (Lisp_Object, Lisp_Object,
                                                  bool);
+extern Lisp_Object encode_string_utf_8 (Lisp_Object, Lisp_Object, bool,
+                                        Lisp_Object, Lisp_Object);
+extern Lisp_Object decode_string_utf_8 (Lisp_Object, Lisp_Object, bool,
+                                        Lisp_Object, Lisp_Object);
 extern Lisp_Object encode_file_name (Lisp_Object);
 extern Lisp_Object decode_file_name (Lisp_Object);
 extern Lisp_Object raw_text_coding_system (Lisp_Object);