FcStrStr (3) - Linux Manuals
FcStrStr: locate UTF-8 substring
NAME
FcStrStr - locate UTF-8 substring
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcChar8 * FcStrStr (const FcChar8 *s1, const FcChar8 *s2);
DESCRIPTION
Returns the location of s2 in s1. Returns NULL if s2 is not present in s1. This test will operate properly with UTF8 encoded strings.