1 /* $NetBSD: asctime.c,v 1.11 2000/09/13 22:32:28 msaitoh Exp $ */ 2 3 /* 4 ** This file is in the public domain, so clarified as of 5 ** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov). 6 */ 7 8 #include <sys/cdefs.h> 9 #if defined(LIBC_SCCS) && !defined(lint) 10 #if 0 11 static char elsieid[] = "@(#)asctime.c 7.9"; 12 #else 13 __RCSID("$NetBSD: asctime.c,v 1.11 2000/09/13 22:32:28 msaitoh Exp $"); 14 #endif 15 #endif /* LIBC_SCCS and not lint */ 16 17 /*LINTLIBRARY*/ 18 19 #include "namespace.h" 20 #include "private.h" 21 #include "tzfile.h" 22 23 #ifdef __weak_alias 24 __weak_alias(asctime_r,_asctime_r) 25 #endif 26 27 /* 28 ** A la ISO/IEC 9945-1, ANSI/IEEE Std 1003.1, Second Edition, 1996-07-12. 29 */ 30 31 /* 32 ** Big enough for something such as 33 ** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n 34 ** (two three-character abbreviations, five strings denoting integers, 35 ** three explicit spaces, two explicit colons, a newline, 36 ** and a trailing ASCII nul). 37 */ 38 #define ASCTIME_BUFLEN (3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) + 3 + 2 + 1 + 1) 39 40 char * 41 asctime_r(timeptr, buf) 42 register const struct tm * timeptr; 43 char * buf; 44 { 45 static const char wday_name[][3] = { 46 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" 47 }; 48 static const char mon_name[][3] = { 49 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 50 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 51 }; 52 register const char * wn; 53 register const char * mn; 54 55 if (timeptr->tm_wday < 0 || timeptr->tm_wday >= DAYSPERWEEK) 56 wn = "???"; 57 else wn = wday_name[timeptr->tm_wday]; 58 if (timeptr->tm_mon < 0 || timeptr->tm_mon >= MONSPERYEAR) 59 mn = "???"; 60 else mn = mon_name[timeptr->tm_mon]; 61 /* 62 ** The X3J11-suggested format is 63 ** "%.3s %.3s%3d %02.2d:%02.2d:%02.2d %d\n" 64 ** Since the .2 in 02.2d is ignored, we drop it. 65 */ 66 (void)snprintf(buf, 67 sizeof (char[ASCTIME_BUFLEN]), 68 "%.3s %.3s%3d %02d:%02d:%02d %d\n", 69 wn, mn, 70 timeptr->tm_mday, timeptr->tm_hour, 71 timeptr->tm_min, timeptr->tm_sec, 72 TM_YEAR_BASE + timeptr->tm_year); 73 return buf; 74 } 75 76 /* 77 ** A la X3J11, with core dump avoidance. 78 */ 79 80 char * 81 asctime(timeptr) 82 register const struct tm * timeptr; 83 { 84 static char result[ASCTIME_BUFLEN]; 85 86 return asctime_r(timeptr, result); 87 } 88