Add new function utf8_from_bytes_loc()

This is currently undocumented externally, so we can change the API if
needed.

This is like utf8_from_bytes(), but in the case of not being able to
convert the whole string, it converts the initial substring that is
convertible, and tells you where it had to stop.

1 files changed, 2 insertions, 0 deletions

diff --git a/utf8.h b/utf8.h
index 41db2f4b93..276fa2953f 100644
--- a/utf8.h
+++ b/utf8.h
@@ -1049,6 +1049,8 @@ is a valid UTF-8 character.
           : _is_utf8_char_helper(s, e, 0))
 
 #define is_utf8_char_buf(buf, buf_end) isUTF8_CHAR(buf, buf_end)
+#define bytes_from_utf8(s, lenp, is_utf8p)                                  \
+                            bytes_from_utf8_loc(s, lenp, is_utf8p, 0)
 
 /*