Add inet_pton() for Win32.

Needed by MinGW32... we'll see if MSVC needs it as well soon.

src/xpdev/sockwrap.c

@@ -523,3 +523,39 @@ DLLEXPORT char* socket_strerror(int error_number, char* buf, size_t buflen)
 	return safe_strerror(error_number, buf, buflen);
 #endif
 }
+
+#ifdef _WIN32
+DLLEXPORT int inet_pton(int af, const char *src, void *dst)
+{
+	struct addrinfo hints = {0};
+	struct addrinfo *res, *cur;
+
+	if (af != AF_INET && af != AF_INET6) {
+		// TODO: Should set socket_errno to EAFNOSUPPORT
+		return -1;
+	}
+
+	hints.ai_flags = AI_NUMERICHOST|AI_PASSIVE;
+	if(getaddrinfo(addr_str, NULL, &hints, &res))
+		return -1;
+
+	for(cur = res; cur; cur++) {
+		if(cur->ai_addr->sa_family == af)
+			break;
+	}
+	if(!cur) {
+		freeaddrinfo(res);
+		return 0;
+	}
+	switch(af) {
+		case AF_INET:
+			memcpy(dst, ((struct sockaddr_in *)(cur->sin_addr)), sizeof((struct sockaddr_in *)cur->sin_addr));
+			break;
+		case AF_INET6:
+			memcpy(dst, ((struct sockaddr_in6 *)(cur->sin6_addr)), sizeof((struct sockaddr_in6 *)cur->sin6_addr));
+			break;
+	}
+	freeaddrinfo(res);
+	return addr;
+}
+#endif

src/xpdev/sockwrap.h

@@ -241,6 +241,10 @@ DLLEXPORT void inet_setaddrport(union xp_sockaddr *addr, uint16_t port);
 DLLEXPORT BOOL inet_addrmatch(union xp_sockaddr* addr1, union xp_sockaddr* addr2);
 DLLEXPORT char* socket_strerror(int, char*, size_t);
 
+#ifdef _WIN32
+DLLEXPORT int inet_pton(int af, const char *src, void *dst);
+#endif
+
 #ifdef __cplusplus
 }
 #endif