man FcStrCmpIgnoreCase (Fonctions bibliothèques) - compare UTF-8 strings ignoring ASCII case
NAME
FcStrCmpIgnoreCase - compare UTF-8 strings ignoring ASCII case
SYNOPSIS
#include <fontconfig.h> int FcStrCmpIgnoreCase (const FcChar8 *s1, const FcChar8 *s2);
DESCRIPTION
Returns the usual <0, 0, >0 result of comparing s1 and s2. This test is case-insensitive in the ASCII range and will operate properly with UTF8 encoded strings, although it does not check for well formed strings.
VERSION
Fontconfig version 2.3.2