/* $NetBSD: inet_neta.c,v 1.8 1998/11/13 15:46:54 christos Exp $ */ /* * Copyright (c) 1996 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static const char rcsid[] = "Id: inet_neta.c,v 8.2 1996/08/08 06:54:44 vixie Exp "; #else __RCSID("$NetBSD: inet_neta.c,v 1.8 1998/11/13 15:46:54 christos Exp $"); #endif #endif #include "namespace.h" #include #include #include #include #include #include #include #ifdef __weak_alias __weak_alias(inet_neta,_inet_neta); #endif #ifdef SPRINTF_CHAR # define SPRINTF(x) strlen(sprintf/**/x) #else # define SPRINTF(x) ((size_t)sprintf x) #endif /* * char * * inet_neta(src, dst, size) * format a u_long network number into presentation format. * return: * pointer to dst, or NULL if an error occurred (check errno). * note: * format of ``src'' is as for inet_network(). * author: * Paul Vixie (ISC), July 1996 */ char * inet_neta(src, dst, size) u_long src; char *dst; size_t size; { char *odst = dst; char *tp; while (src & 0xffffffff) { u_char b = (u_char)((src & 0xff000000) >> 24); src <<= 8; if (b) { if (size < sizeof "255.") goto emsgsize; tp = dst; dst += SPRINTF((dst, "%u", b)); if (src != 0L) { *dst++ = '.'; *dst = '\0'; } size -= (size_t)(dst - tp); } } if (dst == odst) { if (size < sizeof "0.0.0.0") goto emsgsize; strcpy(dst, "0.0.0.0"); } return (odst); emsgsize: errno = EMSGSIZE; return (NULL); }