Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 

NAME
FcUtf8ToUcs4 - convert UTF-8 to UCS4
SYNOPSIS
#include <fontconfig/fontconfig.h>
int FcUtf8ToUcs4 (FcChar8 *src, FcChar32 *dst, int len);
DESCRIPTION
Converts the next Unicode char from src into dst and returns the number of bytes containing the char.
src must be at least len bytes long.
Fontconfig 2.12.6 05 April 2018 FcUtf8ToUcs4(3)