#include <netdb.h>

#define T(t) (t*)0;

#define F(t,n) {t *y = &x.;;}

#define C(n) switch(n){case n:;}

static void f()

{

T(uint32_t)

T(socklen_t)

C(IPPORT_RESERVED)

{

struct hostent x;

F(char*, h_name)

F(char**, h_aliases)

F(int, h_addrtype)

F(int, h_length)

F(char**, h_addr_list)

}

{

struct netent x;

F(char*, n_name)

F(char**, n_aliases)

F(int, n_addrtype)

F(uint32_t, n_net)

}

{

struct protoent x;

F(char*, p_name)

F(char**, p_aliases)

F(int, p_proto)

}

{

struct servent x;

F(char*, s_name)

F(char**, s_aliases)

F(int, s_port)

F(char*, s_proto)

}

{

struct addrinfo x;

F(int, ai_flags)

F(int, ai_family)

F(int, ai_socktype)

F(int, ai_protocol)

F(socklen_t, ai_addrlen)

F(struct sockaddr*, ai_addr)

F(char*, ai_canonname)

F(struct addrinfo*, ai_next)

}

C(AI_PASSIVE)

C(AI_CANONNAME)

C(AI_NUMERICHOST)

C(AI_NUMERICSERV)

C(AI_V4MAPPED)

C(AI_ALL)

C(AI_ADDRCONFIG)

C(NI_NOFQDN)

C(NI_NUMERICHOST)

C(NI_NAMEREQD)

C(NI_NUMERICSERV)

C(NI_NUMERICSCOPE)

C(NI_DGRAM)

C(EAI_AGAIN)

C(EAI_BADFLAGS)

C(EAI_FAIL)

C(EAI_FAMILY)

C(EAI_MEMORY)

C(EAI_NONAME)

C(EAI_SERVICE)

C(EAI_SOCKTYPE)

C(EAI_SYSTEM)

C(EAI_OVERFLOW)

{void(*p)(void) = endhostent;}

{void(*p)(void) = endnetent;}

{void(*p)(void) = endprotoent;}

{void(*p)(void) = endservent;}

{const char*(*p)(int) = gai_strerror;}

{struct hostent*(*p)(void) = gethostent;}

{struct netent*(*p)(uint32_t,int) = getnetbyaddr;}

{struct netent*(*p)(const char*) = getnetbyname;}

{struct netent*(*p)(void) = getnetent;}

{struct protoent*(*p)(const char*) = getprotobyname;}

{struct protoent*(*p)(int) = getprotobynumber;}

{struct protoent*(*p)(void) = getprotoent;}

{struct servent*(*p)(const char*,const char*) = getservbyname;}

{struct servent*(*p)(int,const char*) = getservbyport;}

{struct servent*(*p)(void) = getservent;}

{void(*p)(int) = sethostent;}

{void(*p)(int) = setnetent;}

{void(*p)(int) = setprotoent;}

{void(*p)(int) = setservent;}

}

#include <sys/socket.h>

static void g()

{

{void(*p)(struct addrinfo*) = freeaddrinfo;}

{int(*p)(const char*restrict,const char*restrict,const struct addrinfo*restrict,struct addrinfo**restrict) = getaddrinfo;}

{int(*p)(const struct sockaddr*restrict,socklen_t,char*restrict,socklen_t,char*restrict,socklen_t,int) = getnameinfo;}

}