refs: split filesystem-based refs code into a new file

diff --git a/utf8.c b/utf8.c
index 28e6d76a425db4c16a8cc32e6f17c7aa72c2b1f0..00e10c86ad7ea7bcc2d53a90a2f608dd66d47462 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -644,3 +644,24 @@ int skip_utf8_bom(char **text, size_t len)
        *text += strlen(utf8_bom);
        return 1;
 }
+
+void strbuf_utf8_align(struct strbuf *buf, align_type position, unsigned int width,
+                      const char *s)
+{
+       int slen = strlen(s);
+       int display_len = utf8_strnwidth(s, slen, 0);
+       int utf8_compensation = slen - display_len;
+
+       if (display_len >= width) {
+               strbuf_addstr(buf, s);
+               return;
+       }
+
+       if (position == ALIGN_LEFT)
+               strbuf_addf(buf, "%-*s", width + utf8_compensation, s);
+       else if (position == ALIGN_MIDDLE) {
+               int left = (width - display_len) / 2;
+               strbuf_addf(buf, "%*s%-*s", left, "", width - left + utf8_compensation, s);
+       } else if (position == ALIGN_RIGHT)
+               strbuf_addf(buf, "%*s", width + utf8_compensation, s);
+}