Man page - fccharsetaddchar(3)
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Manual
FcCharSetAddChar
NAMESYNOPSIS
DESCRIPTION
NAME
FcCharSetAddChar - Add a character to a charset
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcCharSetAddChar (FcCharSet * fcs , FcChar32 ucs4 );
DESCRIPTION
FcCharSetAddChar adds a single Unicode char to the set, returning FcFalse on failure, either as a result of a constant set or from running out of memory.