88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 2001,2008 Oracle. All rights reserved.
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*
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* $Id: ce_ctime.c 63573 2008-05-23 21:43:21Z trent.nelson $
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*/
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#include "db_config.h"
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#include "db_int.h"
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static void __os_windows_ct_numb __P((char *, int));
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/*
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* __os_ctime --
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* Format a time-stamp.
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*/
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char *
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__os_ctime(tod, time_buf)
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const time_t *tod;
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char *time_buf;
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{
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char *ncp;
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__int64 i64_tod;
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struct _FILETIME file_tod, file_loc;
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struct _SYSTEMTIME sys_loc;
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static const __int64 SECS_BETWEEN_EPOCHS = 11644473600;
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static const __int64 SECS_TO_100NS = 10000000; /* 10^7 */
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strcpy(time_buf, "Thu Jan 01 00:00:00 1970");
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time_buf[CTIME_BUFLEN - 1] = '\0';
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/* Convert the tod to a SYSTEM_TIME struct */
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i64_tod = *tod;
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i64_tod = (i64_tod + SECS_BETWEEN_EPOCHS)*SECS_TO_100NS;
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memcpy(&file_tod, &i64_tod, sizeof(file_tod));
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FileTimeToLocalFileTime(&file_tod, &file_loc);
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FileTimeToSystemTime(&file_loc, &sys_loc);
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/*
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* Convert the _SYSTEMTIME to the correct format in time_buf.
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* Based closely on the os_brew/ctime.c implementation.
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*
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* wWeekDay : Day of the week 0-6 (0=Monday, 6=Sunday)
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*/
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ncp = &"MonTueWedThuFriSatSun"[sys_loc.wDayOfWeek*3];
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time_buf[0] = *ncp++;
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time_buf[1] = *ncp++;
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time_buf[2] = *ncp;
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ncp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[(sys_loc.wMonth - 1) * 3];
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time_buf[4] = *ncp++;
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time_buf[5] = *ncp++;
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time_buf[6] = *ncp;
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__os_windows_ct_numb(time_buf + 8, sys_loc.wDay);
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/* Add 100 to keep the leading zero. */
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__os_windows_ct_numb(time_buf + 11, sys_loc.wHour + 100);
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__os_windows_ct_numb(time_buf + 14, sys_loc.wMinute + 100);
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__os_windows_ct_numb(time_buf + 17, sys_loc.wSecond + 100);
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if (sys_loc.wYear < 100) { /* 9 99 */
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time_buf[20] = ' ';
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time_buf[21] = ' ';
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__os_windows_ct_numb(time_buf + 22, sys_loc.wYear);
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} else { /* 99 1999 */
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__os_windows_ct_numb(time_buf + 20, sys_loc.wYear / 100);
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__os_windows_ct_numb(time_buf + 22, sys_loc.wYear % 100 + 100);
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}
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return (time_buf);
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}
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/*
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* __os_windows_ct_numb --
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* Append ASCII representations for two digits to a string.
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*/
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static void
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__os_windows_ct_numb(cp, n)
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char *cp;
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int n;
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{
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cp[0] = ' ';
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if (n >= 10)
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cp[0] = (n / 10) % 10 + '0';
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cp[1] = n % 10 + '0';
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}
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