1 /* 2 ** This file is in the public domain, so clarified as of 3 ** June 5, 1996 by Arthur David Olson (arthur_david_olson@nih.gov). 4 ** 5 ** $FreeBSD: src/lib/libc/stdtime/asctime.c,v 1.7.6.1 2001/03/05 11:37:20 obrien Exp $ 6 ** $DragonFly: src/lib/libc/stdtime/asctime.c,v 1.3 2004/10/25 19:38:02 drhodus Exp $ 7 */ 8 9 /* 10 * @(#)asctime.c 7.7 11 */ 12 /*LINTLIBRARY*/ 13 14 #include "private.h" 15 #include "tzfile.h" 16 17 /* 18 ** A la X3J11, with core dump avoidance. 19 */ 20 21 22 char * 23 asctime(timeptr) 24 const struct tm * timeptr; 25 { 26 static char result[3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) + 27 3 + 2 + 1 + 1]; 28 return(asctime_r(timeptr, result)); 29 } 30 31 char * 32 asctime_r(timeptr, result) 33 const struct tm * timeptr; 34 char *result; 35 { 36 static const char wday_name[][3] = { 37 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" 38 }; 39 static const char mon_name[][3] = { 40 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 41 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 42 }; 43 /* 44 ** Big enough for something such as 45 ** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n 46 ** (two three-character abbreviations, five strings denoting integers, 47 ** three explicit spaces, two explicit colons, a newline, 48 ** and a trailing ASCII nul). 49 */ 50 const char * wn; 51 const char * mn; 52 53 if (timeptr->tm_wday < 0 || timeptr->tm_wday >= DAYSPERWEEK) 54 wn = "???"; 55 else wn = wday_name[timeptr->tm_wday]; 56 if (timeptr->tm_mon < 0 || timeptr->tm_mon >= MONSPERYEAR) 57 mn = "???"; 58 else mn = mon_name[timeptr->tm_mon]; 59 /* 60 ** The X3J11-suggested format is 61 ** "%.3s %.3s%3d %02.2d:%02.2d:%02.2d %d\n" 62 ** Since the .2 in 02.2d is ignored, we drop it. 63 */ 64 (void) sprintf(result, "%.3s %.3s%3d %02d:%02d:%02d %d\n", 65 wn, mn, 66 timeptr->tm_mday, timeptr->tm_hour, 67 timeptr->tm_min, timeptr->tm_sec, 68 TM_YEAR_BASE + timeptr->tm_year); 69 return result; 70 } 71