/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/types.h> #include <sys/time.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <tzfile.h> char *_tztab(); /* * timezone -- * The arguments are the number of minutes of time you are westward * from Greenwich and whether DST is in effect. It returns a string * giving the name of the local timezone. Should be replaced, in the * application code, by a call to localtime. */ static char czone[TZ_MAX_CHARS]; /* space for zone name */ char * timezone(zone, dst) int zone, dst; { register char *beg, *end; if (beg = getenv("TZNAME")) { /* set in environment */ if (end = index(beg, ',')) { /* "PST,PDT" */ if (dst) return(++end); *end = '\0'; (void)strncpy(czone,beg,sizeof(czone) - 1); czone[sizeof(czone) - 1] = '\0'; *end = ','; return(czone); } return(beg); } return(_tztab(zone,dst)); /* default: table or created zone */ } static struct zone { int offset; char *stdzone; char *dlzone; } zonetab[] = { -1*60, "MET", "MET DST", /* Middle European */ -2*60, "EET", "EET DST", /* Eastern European */ 4*60, "AST", "ADT", /* Atlantic */ 5*60, "EST", "EDT", /* Eastern */ 6*60, "CST", "CDT", /* Central */ 7*60, "MST", "MDT", /* Mountain */ 8*60, "PST", "PDT", /* Pacific */ #ifdef notdef /* there's no way to distinguish this from WET */ 0, "GMT", 0, /* Greenwich */ #endif 0*60, "WET", "WET DST", /* Western European */ -10*60, "EST", "EST", /* Aust: Eastern */ -10*60+30, "CST", "CST", /* Aust: Central */ -8*60, "WST", 0, /* Aust: Western */ -1 }; /* * _tztab -- * check static tables or create a new zone name; broken out so that * we can make a guess as to what the zone is if the standard tables * aren't in place in /etc. DO NOT USE THIS ROUTINE OUTSIDE OF THE * STANDARD LIBRARY. */ char * _tztab(zone,dst) register int zone; int dst; { register struct zone *zp; register char sign; for (zp = zonetab; zp->offset != -1;++zp) /* static tables */ if (zp->offset == zone) { if (dst && zp->dlzone) return(zp->dlzone); if (!dst && zp->stdzone) return(zp->stdzone); } if (zone < 0) { /* create one */ zone = -zone; sign = '+'; } else sign = '-'; (void)sprintf(czone,"GMT%c%d:%02d",sign,zone / 60,zone % 60); return(czone); }