strbuf: add fixed-length version of add_wrapped_text

The function strbuf_add_wrapped_text takes a NUL-terminated
string. This makes it annoying to wrap strings we have as a
pointer and a length.

Refactoring strbuf_add_wrapped_text and all of its
sub-functions to handle fixed-length strings turned out to
be really ugly. So this implementation is lame; it just
strdups the text and operates on the NUL-terminated version.
This should be fine as the strings we are wrapping are
generally pretty short.  If it becomes a problem, we can
optimize later.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

utf8.c

@@ -405,6 +405,15 @@ new_line:
 	}
 }
 
+int strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
+			     int indent, int indent2, int width)
+{
+	char *tmp = xstrndup(data, len);
+	int r = strbuf_add_wrapped_text(buf, tmp, indent, indent2, width);
+	free(tmp);
+	return r;
+}
+
 int is_encoding_utf8(const char *name)
 {
 	if (!name)

utf8.h

@@ -10,6 +10,8 @@ int is_encoding_utf8(const char *name);
 
 int strbuf_add_wrapped_text(struct strbuf *buf,
 		const char *text, int indent, int indent2, int width);
+int strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
+			     int indent, int indent2, int width);
 
 #ifndef NO_ICONV
 char *reencode_string(const char *in, const char *out_encoding, const char *in_encoding);