Why create a wrapper fo getaddrinfo()

Overworked_PhD · 11-09-2007, 08:45 PM

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);

Elysia · 11-09-2007, 09:04 PM

If I ask myself that question, the answer would be: convenience.
I'd rather call an easy function with a few params and get the data I require than fill out a troublesome struct and pass along.
It also makes the code cleaner and more structurized, if you ask me.

**Salem** · 11-10-2007, 01:37 AM

> 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.

11-09-2007, 09:04 PM	#2
Elysia Mysterious C++ User Join Date: Oct 2007 Posts: 14,783	If I ask myself that question, the answer would be: convenience. I'd rather call an easy function with a few params and get the data I require than fill out a troublesome struct and pass along. It also makes the code cleaner and more structurized, if you ask me.
Elysia is offline

11-10-2007, 01:37 AM	#3
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,689	> 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. __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

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