man FcStrStrIgnoreCase (Fonctions bibliothèques) - locate UTF-8 substring ignoring ASCII case
NAME
FcStrStrIgnoreCase - locate UTF-8 substring ignoring ASCII case
SYNOPSIS
#include <fontconfig.h> FcChar8 * FcStrStrIgnoreCase (const char *s1, const char *s2);
DESCRIPTION
Returns the location of s2 in s1, ignoring ASCII case. Returns NULL if s2 is not present in s1. 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