FcUcs4ToUtf8 - convert UCS4 to UTF-8
#include <fontconfig.h>
int FcUcs4ToUtf8(FcChar32 src);
(FcChar8 dst[FC_UTF8_MAX_LEN]);
.fi
Converts the Unicode char from src into dst and returns the number of
bytes needed to encode the char.
Fontconfig version 2.8.0
18 November 2009 FcUcs4ToUtf8(3)