sinit.c

来自「Porting the Simple Sockets Library Dr. C」· C语言 代码 · 共 48 行

/* Sinit.c: this file contains interfaces to initialize and cleanup.
 *  Most o/s's don't need this, but some (WIN32, MSDOS) do.
 */
#include "sockets.h"

static int ssl_init= 0;

/* --------------------------------------------------------------------- */

/* Sinit: initializes Sockets */
void Sinit()
{

#ifdef MSDOS
/* initialize WIN/API DOS Socket library */
if(ssl_init == 0) {
	ssl_init= 1;
	if(socket_init()) error(XTDIO_ERROR,"socket_init() returned -1, cannot start\n");
	}
#endif

#ifdef __WIN32__
if(ssl_init == 0) {
	static WORD    wVersionRequested;
	static WSADATA wsaData;
	int     err;
	ssl_init= 1;
	wVersionRequested= MAKEWORD(1,1);
	err= WSAStartup(wVersionRequested,&wsaData);
	if(err) error(XTDIO_ERROR,"unable to use sockets, needs version 2.0 or better\n");
	if(LOBYTE(wsaData.wVersion) != 1 ||
	   HIBYTE(wsaData.wVersion) != 1) {
		int hiver;
		int lover;
		hiver= LOBYTE(wsaData.wVersion);
		lover= HIBYTE(wsaData.wVersion);
		WSACleanup();
		error(XTDIO_ERROR,"wrong sockets version (wants 1.1, has %d.%d)\n",
		  hiver,lover);
		}
	atexit((void (*)(void)) WSACleanup);
	}
#endif

}

/* --------------------------------------------------------------------- */