Apd |STRLEN |sv_utf8_upgrade_flags|SV *sv|I32 flags
Apd |char* |sv_pvn_force_flags|SV* sv|STRLEN* lp|I32 flags
Apd |char* |sv_2pv_flags |SV* sv|STRLEN* lp|I32 flags
+Apd |void |sv_copypv |SV* dsv|SV* ssv
Ap |char* |my_atof2 |const char *s|NV* value
Apn |int |my_socketpair |int family|int type|int protocol|int fd[2]