man FcUtf8Len (Fonctions bibliothèques) - count UTF-8 encoded chars
NAME
FcUtf8Len - count UTF-8 encoded chars
SYNOPSIS
#include <fontconfig.h> FcBool FcUtf8Len (FcChar8 *src, intlen, int *nchar, int *wchar);
DESCRIPTION
Counts the number of Unicode chars in len bytes of src. Places that count in nchar. wchar contains 1, 2 or 4 depending on the number of bytes needed to hold the largest unicode char counted. The return value indicates whether src is a well-formed UTF8 string.
VERSION
Fontconfig version 2.3.2