Thread: Why create a wrapper fo getaddrinfo()

Why do something like

Code:

struct addrinto *
host_serv(const char *host, const char *serv, int family, int socktype)
{
     int n;
     struct addrinfo hints, *res;
     bzero(&hints, sizeof(struct addrinfo));
     hints.ai_flags = AI_CANONNAME;
     hints.ai_famility = family;
     hints.ai_socktype = socktype;

     if( n =  getaddrinfo(host, serv, &hints, &res))  !=0)
          return (NULL);
     
    return (res);
}

And then call the function in main() like

Code:

struct addrinfo *ai;

ai = Host_serv(host, NULL, 0, 0);

Why not just call getaddrinfo() directly in main() like

Code:

struct addrinfo hints, *res;
bzero(&hints, sizeof(struct addrinfo));
hints.ai_flags = AI_CANONNAME;
hints.ai_famility = family;
hints.ai_socktype = socktype;

if( n =  getaddrinfo(host, serv, &hints, &res) !=0)
     return (NULL);

> Why not just call getaddrinfo() directly in main() like
Why write functions at all?

The point would be to keep main from becoming a massive bloated function which is impossible to maintain.

Even if it has only a dozen lines, and you only ever call it once from just one place, it's still an improvement.