Man page - fcdircachevalid(3)
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Manual
FcDirCacheValid
NAMESYNOPSIS
DESCRIPTION
NAME
FcDirCacheValid - check directory cache
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcDirCacheValid (const FcChar8 * dir );
DESCRIPTION
Returns FcTrue if dir has an associated valid cache file, else returns FcFalse