1 /* $NetBSD: unctime.c,v 1.9 1995/03/18 14:55:11 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)unctime.c 8.2 (Berkeley) 6/14/94"; 39 #else 40 static char rcsid[] = "$NetBSD: unctime.c,v 1.9 1995/03/18 14:55:11 cgd Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 46 #include <stdio.h> 47 #include <time.h> 48 #ifdef __STDC__ 49 #include <stdlib.h> 50 #include <string.h> 51 #endif 52 53 #ifndef __P 54 #include <sys/cdefs.h> 55 #endif 56 57 /* 58 * Convert a ctime(3) format string into a system format date. 59 * Return the date thus calculated. 60 * 61 * Return -1 if the string is not in ctime format. 62 */ 63 64 /* 65 * Offsets into the ctime string to various parts. 66 */ 67 68 #define E_MONTH 4 69 #define E_DAY 8 70 #define E_HOUR 11 71 #define E_MINUTE 14 72 #define E_SECOND 17 73 #define E_YEAR 20 74 75 static int lookup __P((char *)); 76 77 78 time_t 79 unctime(str) 80 char *str; 81 { 82 struct tm then; 83 char dbuf[26]; 84 85 (void) strncpy(dbuf, str, sizeof(dbuf) - 1); 86 dbuf[sizeof(dbuf) - 1] = '\0'; 87 dbuf[E_MONTH+3] = '\0'; 88 if ((then.tm_mon = lookup(&dbuf[E_MONTH])) < 0) 89 return (-1); 90 then.tm_mday = atoi(&dbuf[E_DAY]); 91 then.tm_hour = atoi(&dbuf[E_HOUR]); 92 then.tm_min = atoi(&dbuf[E_MINUTE]); 93 then.tm_sec = atoi(&dbuf[E_SECOND]); 94 then.tm_year = atoi(&dbuf[E_YEAR]) - 1900; 95 then.tm_isdst = -1; 96 return(mktime(&then)); 97 } 98 99 static char months[] = 100 "JanFebMarAprMayJunJulAugSepOctNovDec"; 101 102 static int 103 lookup(str) 104 char *str; 105 { 106 register char *cp, *cp2; 107 108 for (cp = months, cp2 = str; *cp != '\0'; cp += 3) 109 if (strncmp(cp, cp2, 3) == 0) 110 return((cp-months) / 3); 111 return(-1); 112 } 113