FcStrSetAddFilename (3) - Linux Manuals
FcStrSetAddFilename: add a filename to a string set
NAME
FcStrSetAddFilename - add a filename to a string set
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s);
DESCRIPTION
Adds a copy s to set, The copy is created with FcStrCopyFilename so that leading '~' values are replaced with the value of the HOME environment variable.