isochar
int isochar(const u_char *, const u_char *, int, u_char *);
isochar(isodir->name, pwhead, ana->imp->joliet_level, &c);
isochar(isodir->name, isodir->name + isonum_711(isodir->name_len),
isofn += isochar(isofn, isoend, joliet_level, &c);
isofn += isochar(isofn, isoend,
isofn += isochar(isofn, isoend, joliet_level, &c);
isochar(isofn, isoend, joliet_level, &c);
infn += isochar(infn, infnend, joliet_level, &c);