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159 lines
4.7 KiB
159 lines
4.7 KiB
/***
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*asctime.c - convert date/time structure to ASCII string
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Contains asctime() - convert a date/time structure to ASCII string.
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*
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*Revision History:
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* 03-??-84 RLB Module created
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* 05-??-84 DCW Removed use of sprintf, to avoid loading stdio
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* functions
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* 04-13-87 JCR Added "const" to declarations
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* 05-21-87 SKS Declare the static buffer and helper routines as NEAR
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* Replace store_year() with in-line code
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*
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* 11-24-87 WAJ allocated a static buffer for each thread.
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* 12-11-87 JCR Added "_LOAD_DS" to declaration
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* 05-24-88 PHG Merged DLL and normal versions; Removed initializers to
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* save memory
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* 06-06-89 JCR 386 mthread support
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* 03-20-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include
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* <cruntime.h>, removed #include <register.h>, fixed
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* the copyright and removed some leftover 16-bit support.
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* Also, cleaned up the formatting a bit.
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* 08-16-90 SBM Compiles cleanly with -W3
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* 10-04-90 GJF New-style function declarators.
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* 07-17-91 GJF Multi-thread support for Win32 [_WIN32_].
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* 02-17-93 GJF Changed for new _getptd().
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 11-01-93 CFW Enable Unicode variant, rip out Cruiser.
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* 09-06-94 CFW Replace MTHREAD with _MT.
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* 01-10-95 CFW Debug CRT allocs.
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* 02-09-95 GJF Replaced WPRFLAG with _UNICODE.
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* 12-12-01 BWT Replace _getptd with _getptd_noexit and deal with error
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <time.h>
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#include <internal.h>
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#include <mtdll.h>
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#ifdef _MT
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#include <malloc.h>
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#include <stddef.h>
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#endif
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#include <tchar.h>
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#include <dbgint.h>
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#define _ASCBUFSIZE 26
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static _TSCHAR buf[_ASCBUFSIZE];
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/*
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** This prototype must be local to this file since the procedure is static
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*/
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static _TSCHAR * __cdecl store_dt(_TSCHAR *, int);
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static _TSCHAR * __cdecl store_dt (
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REG1 _TSCHAR *p,
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REG2 int val
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)
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{
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*p++ = (_TSCHAR)(_T('0') + val / 10);
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*p++ = (_TSCHAR)(_T('0') + val % 10);
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return(p);
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}
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/***
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*char *asctime(time) - convert a structure time to ascii string
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*
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*Purpose:
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* Converts a time stored in a struct tm to a charcater string.
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* The string is always exactly 26 characters of the form
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* Tue May 01 02:34:55 1984\n\0
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*
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*Entry:
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* struct tm *time - ptr to time structure
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*
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*Exit:
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* returns pointer to static string with time string.
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*
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*Exceptions:
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*
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*******************************************************************************/
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_TSCHAR * __cdecl _tasctime (
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REG1 const struct tm *tb
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)
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{
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REG2 _TSCHAR *p = buf; /* will point to asctime buffer */
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#ifdef _MT
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_TSCHAR *retval; /* holds retval pointer */
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_ptiddata ptd = _getptd_noexit();
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#endif
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int day, mon;
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int i;
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#ifdef _MT
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/* Use per thread buffer area (malloc space, if necessary) */
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if (ptd) {
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#ifdef _UNICODE
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if ( (ptd->_wasctimebuf != NULL) || ((ptd->_wasctimebuf =
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(wchar_t *)_malloc_crt(_ASCBUFSIZE * sizeof(wchar_t))) != NULL) )
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p = ptd->_wasctimebuf;
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#else
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if ( (ptd->_asctimebuf != NULL) || ((ptd->_asctimebuf =
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(char *)_malloc_crt(_ASCBUFSIZE * sizeof(char))) != NULL) )
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p = ptd->_asctimebuf;
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#endif
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}
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retval = p; /* save return value for later */
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#endif
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/* copy day and month names into the buffer */
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day = tb->tm_wday * 3; /* index to correct day string */
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mon = tb->tm_mon * 3; /* index to correct month string */
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for (i=0; i < 3; i++,p++) {
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*p = *(__dnames + day + i);
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*(p+4) = *(__mnames + mon + i);
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}
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*p = _T(' '); /* blank between day and month */
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p += 4;
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*p++ = _T(' ');
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p = store_dt(p, tb->tm_mday); /* day of the month (1-31) */
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*p++ = _T(' ');
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p = store_dt(p, tb->tm_hour); /* hours (0-23) */
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*p++ = _T(':');
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p = store_dt(p, tb->tm_min); /* minutes (0-59) */
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*p++ = _T(':');
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p = store_dt(p, tb->tm_sec); /* seconds (0-59) */
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*p++ = _T(' ');
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p = store_dt(p, 19 + (tb->tm_year/100)); /* year (after 1900) */
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p = store_dt(p, tb->tm_year%100);
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*p++ = _T('\n');
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*p = _T('\0');
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#ifdef _POSIX_
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/* Date should be padded with spaces instead of zeroes. */
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if (_T('0') == buf[8])
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buf[8] = _T(' ');
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#endif
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#ifdef _MT
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return (retval);
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#else
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return ((_TSCHAR *) buf);
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#endif
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}
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