#include <stdlib.h>
#ifndef _MSC_VER
#include <unistd.h>
#endif
#include <string.h>
#include "SDL.h"
#include "SDL_net.h"

int main(int argc, char **argv)
{
	IPaddress ip;
	const char *host;
	Uint8 *ipaddr;
	
	/* check our commandline */
	if(argc>1 && !strncmp("-h",argv[1],2))
	{
		printf("%s host|ip\n",argv[0]);
		exit(0);
	}
	
	/* do a little version check for information */
	{
		SDL_version compile_version;
		const SDL_version *link_version=SDLNet_Linked_Version();
		SDL_NET_VERSION(&compile_version);
		printf("compiled with SDL_net version: %d.%d.%d\n", 
				compile_version.major,
				compile_version.minor,
				compile_version.patch);
		printf("running with SDL_net version: %d.%d.%d\n", 
				link_version->major,
				link_version->minor,
				link_version->patch);
	}

	/* initialize SDL */
	if(SDL_Init(0)==-1)
	{
		printf("SDL_Init: %s\n",SDL_GetError());
		exit(1);
	}

	/* initialize SDL_net */
	if(SDLNet_Init()==-1)
	{
		printf("SDLNet_Init: %s\n",SDLNet_GetError());
		exit(2);
	}

#ifndef WIN32 /* has no gethostname that we can use here... */
	{
		char localhostname[256];
		if((gethostname(localhostname, 256)>=0))
		{
			printf("Local Host: %s\n",localhostname);
			printf("Resolving %s\n",localhostname);
			if(SDLNet_ResolveHost(&ip,localhostname,0)==-1)
			{
				printf("Could not resolve host \"%s\"\n%s\n",
						localhostname,SDLNet_GetError());
			}
			else
			{
				/* use the IP as a Uint8[4] */
				ipaddr=(Uint8*)&ip.host;

				/* output the IP address nicely */
				printf("Local IP Address : %d.%d.%d.%d\n",
						ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
			}
		}
	}
#endif
	
	if(argc<2)
		exit(0);
	
	/* Resolve the argument into an IPaddress type */
	printf("Resolving %s\n",argv[1]);
	if(SDLNet_ResolveHost(&ip,argv[1],0)==-1)
	{
		printf("Could not resolve host \"%s\"\n%s\n",argv[1],SDLNet_GetError());
		exit(3);
	}

	/* use the IP as a Uint8[4] */
	ipaddr=(Uint8*)&ip.host;

	/* output the IP address nicely */
	printf("IP Address : %d.%d.%d.%d\n",
			ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);

	/* resolve the hostname for the IPaddress */
	host=SDLNet_ResolveIP(&ip);

	/* print out the hostname we got */
	if(host)
		printf("Hostname   : %s\n",host);
	else
		printf("No Hostname found\n");

	/* shutdown SDL_net */
	SDLNet_Quit();

	/* shutdown SDL */
	SDL_Quit();

	return(0);
}