utf8: pick_one_utf8_char()

utf8_width() function was doing two different things.  To pick a
valid character from UTF-8 stream, and compute the display width of
that character.  This splits the former to a separate function
pick_one_utf8_char().

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/utf8.h b/utf8.h
index 15db6f1f2..4a7f0464c 100644
--- a/utf8.h
+++ b/utf8.h
@@ -1,6 +1,9 @@
 #ifndef GIT_UTF8_H
 #define GIT_UTF8_H
 
+typedef unsigned int ucs_char_t;  /* assuming 32bit int */
+
+ucs_char_t pick_one_utf8_char(const char **start);
 int utf8_width(const char **start);
 int is_utf8(const char *text);
 int is_encoding_utf8(const char *name);