[HACKERS] name.c

[mohsen soodkhah mohammadi]

in name.c file in source code of postgresql
I find some fuctions that I don't know where did use them?
the functions are:
int namecpy(Name n1, Name n2){..}
int namecat(Name n1, Name n2){..}
int namecmp(Name n1, Name n2){..}
int namestrcpy(Name name, const char *str){..}
int namestrcat(Name name, const char *str){..}
also before some of these functions became the #ifdef NOT_USED
when NOT_USED is set?and why it set?
thanks.