1/*- 2 * See the file LICENSE for redistribution information. 3 * 4 * Copyright (c) 2001,2008 Oracle. All rights reserved. 5 * 6 * $Id: ce_ctime.c,v 12.6 2008/01/08 20:58:46 bostic Exp $ 7 */ 8 9#include "db_config.h" 10 11#include "db_int.h" 12 13static void __os_windows_ct_numb __P((char *, int)); 14 15/* 16 * __os_ctime -- 17 * Format a time-stamp. 18 */ 19char * 20__os_ctime(tod, time_buf) 21 const time_t *tod; 22 char *time_buf; 23{ 24 char *ncp; 25 __int64 i64_tod; 26 struct _FILETIME file_tod, file_loc; 27 struct _SYSTEMTIME sys_loc; 28static const __int64 SECS_BETWEEN_EPOCHS = 11644473600; 29static const __int64 SECS_TO_100NS = 10000000; /* 10^7 */ 30 31 strcpy(time_buf, "Thu Jan 01 00:00:00 1970"); 32 time_buf[CTIME_BUFLEN - 1] = '\0'; 33 34 /* Convert the tod to a SYSTEM_TIME struct */ 35 i64_tod = *tod; 36 i64_tod = (i64_tod + SECS_BETWEEN_EPOCHS)*SECS_TO_100NS; 37 memcpy(&file_tod, &i64_tod, sizeof(file_tod)); 38 FileTimeToLocalFileTime(&file_tod, &file_loc); 39 FileTimeToSystemTime(&file_loc, &sys_loc); 40 41 /* 42 * Convert the _SYSTEMTIME to the correct format in time_buf. 43 * Based closely on the os_brew/ctime.c implementation. 44 * 45 * wWeekDay : Day of the week 0-6 (0=Monday, 6=Sunday) 46 */ 47 ncp = &"MonTueWedThuFriSatSun"[sys_loc.wDayOfWeek*3]; 48 time_buf[0] = *ncp++; 49 time_buf[1] = *ncp++; 50 time_buf[2] = *ncp; 51 ncp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[(sys_loc.wMonth - 1) * 3]; 52 time_buf[4] = *ncp++; 53 time_buf[5] = *ncp++; 54 time_buf[6] = *ncp; 55 56 __os_windows_ct_numb(time_buf + 8, sys_loc.wDay); 57 /* Add 100 to keep the leading zero. */ 58 __os_windows_ct_numb(time_buf + 11, sys_loc.wHour + 100); 59 __os_windows_ct_numb(time_buf + 14, sys_loc.wMinute + 100); 60 __os_windows_ct_numb(time_buf + 17, sys_loc.wSecond + 100); 61 62 if (sys_loc.wYear < 100) { /* 9 99 */ 63 time_buf[20] = ' '; 64 time_buf[21] = ' '; 65 __os_windows_ct_numb(time_buf + 22, sys_loc.wYear); 66 } else { /* 99 1999 */ 67 __os_windows_ct_numb(time_buf + 20, sys_loc.wYear / 100); 68 __os_windows_ct_numb(time_buf + 22, sys_loc.wYear % 100 + 100); 69 } 70 71 return (time_buf); 72} 73 74/* 75 * __os_windows_ct_numb -- 76 * Append ASCII representations for two digits to a string. 77 */ 78static void 79__os_windows_ct_numb(cp, n) 80 char *cp; 81 int n; 82{ 83 cp[0] = ' '; 84 if (n >= 10) 85 cp[0] = (n / 10) % 10 + '0'; 86 cp[1] = n % 10 + '0'; 87} 88