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![Werner Koch](/assets/img/avatar_default.png)
* common/gettime.c: Include locale.h. (asctimestamp): Increase buffer. On Windows use setlocale. -- GnuPG-bug-id: 5073 Signed-off-by: Werner Koch <wk@gnupg.org>
1026 lines
24 KiB
C
1026 lines
24 KiB
C
/* gettime.c - Wrapper for time functions
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* Copyright (C) 1998, 2002, 2007, 2011 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <time.h>
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#include <ctype.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#ifdef HAVE_LANGINFO_H
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#include <langinfo.h>
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#endif
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#include "util.h"
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#include "i18n.h"
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#include "gettime.h"
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#ifdef HAVE_UNSIGNED_TIME_T
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# define IS_INVALID_TIME_T(a) ((a) == (time_t)(-1))
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#else
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/* Error or 32 bit time_t and value after 2038-01-19. */
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# define IS_INVALID_TIME_T(a) ((a) < 0)
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#endif
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static unsigned long timewarp;
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static enum { NORMAL = 0, FROZEN, FUTURE, PAST } timemode;
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/* Correction used to map to real Julian days. */
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#define JD_DIFF 1721060L
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/* Wrapper for the time(3). We use this here so we can fake the time
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for tests */
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time_t
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gnupg_get_time ()
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{
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time_t current = time (NULL);
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if (current == (time_t)(-1))
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log_fatal ("time() failed\n");
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if (timemode == NORMAL)
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return current;
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else if (timemode == FROZEN)
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return timewarp;
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else if (timemode == FUTURE)
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return current + timewarp;
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else
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return current - timewarp;
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}
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/* Wrapper around gmtime_r.
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On systems without gmtime_r this implementation works within gnupg
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because we use only one thread a time. FIXME: An independent
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library may use gmtime in one of its own thread (or via
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npth_enter/npth_leave) - in this case we run into a problem. The
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solution would be to use a mutex here. */
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struct tm *
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gnupg_gmtime (const time_t *timep, struct tm *result)
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{
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#ifdef HAVE_GMTIME_R
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return gmtime_r (timep, result);
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#else
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struct tm *tp;
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tp = gmtime (timep);
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if (tp)
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memcpy (result, tp, sizeof *result);
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return tp;
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#endif
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}
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/* Return the current time (possibly faked) in ISO format. */
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void
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gnupg_get_isotime (gnupg_isotime_t timebuf)
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{
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time_t atime = gnupg_get_time ();
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struct tm *tp;
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struct tm tmbuf;
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tp = gnupg_gmtime (&atime, &tmbuf);
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if (!tp)
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*timebuf = 0;
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else
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snprintf (timebuf, 16, "%04d%02d%02dT%02d%02d%02d",
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1900 + tp->tm_year, tp->tm_mon+1, tp->tm_mday,
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tp->tm_hour, tp->tm_min, tp->tm_sec);
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}
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/* Set the time to NEWTIME so that gnupg_get_time returns a time
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starting with this one. With FREEZE set to 1 the returned time
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will never change. Just for completeness, a value of (time_t)-1
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for NEWTIME gets you back to reality. Note that this is obviously
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not thread-safe but this is not required. */
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void
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gnupg_set_time (time_t newtime, int freeze)
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{
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time_t current = time (NULL);
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if ( newtime == (time_t)-1 || current == newtime)
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{
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timemode = NORMAL;
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timewarp = 0;
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}
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else if (freeze)
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{
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timemode = FROZEN;
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timewarp = newtime == (time_t)-1 ? current : newtime;
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}
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else if (newtime > current)
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{
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timemode = FUTURE;
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timewarp = newtime - current;
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}
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else
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{
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timemode = PAST;
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timewarp = current - newtime;
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}
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}
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/* Returns true when we are in timewarp mode */
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int
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gnupg_faked_time_p (void)
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{
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return timemode;
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}
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/* This function is used by gpg because OpenPGP defines the timestamp
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as an unsigned 32 bit value. */
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u32
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make_timestamp (void)
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{
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time_t t = gnupg_get_time ();
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return (u32)t;
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}
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/****************
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* Scan a date string and return a timestamp.
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* The only supported format is "yyyy-mm-dd"
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* Returns 0 for an invalid date.
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*/
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u32
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scan_isodatestr( const char *string )
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{
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int year, month, day;
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struct tm tmbuf;
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time_t stamp;
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int i;
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if( strlen(string) != 10 || string[4] != '-' || string[7] != '-' )
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return 0;
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for( i=0; i < 4; i++ )
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if( !digitp (string+i) )
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return 0;
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if( !digitp (string+5) || !digitp(string+6) )
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return 0;
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if( !digitp(string+8) || !digitp(string+9) )
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return 0;
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year = atoi(string);
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month = atoi(string+5);
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day = atoi(string+8);
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/* some basic checks */
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if( year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 )
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return 0;
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memset( &tmbuf, 0, sizeof tmbuf );
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tmbuf.tm_mday = day;
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tmbuf.tm_mon = month-1;
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tmbuf.tm_year = year - 1900;
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tmbuf.tm_isdst = -1;
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stamp = mktime( &tmbuf );
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if( stamp == (time_t)-1 )
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return 0;
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return stamp;
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}
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int
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isotime_p (const char *string)
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{
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const char *s;
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int i;
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if (!*string)
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return 0;
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for (s=string, i=0; i < 8; i++, s++)
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if (!digitp (s))
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return 0;
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if (*s != 'T')
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return 0;
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for (s++, i=9; i < 15; i++, s++)
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if (!digitp (s))
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return 0;
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if (*s == 'Z')
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s++;
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if ( !(!*s || (isascii (*s) && isspace(*s)) || *s == ':' || *s == ','))
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return 0; /* Wrong delimiter. */
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return 1;
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}
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/* Scan a string and return true if the string represents the human
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readable format of an ISO time. This format is:
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yyyy-mm-dd[ hh[:mm[:ss]]]
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Scanning stops at the second space or at a comma. If DATE_ONLY is
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true the time part is not expected and the scanning stops at the
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first space or at a comma. */
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int
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isotime_human_p (const char *string, int date_only)
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{
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const char *s;
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int i;
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if (!*string)
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return 0;
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for (s=string, i=0; i < 4; i++, s++)
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if (!digitp (s))
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return 0;
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if (*s != '-')
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return 0;
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s++;
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if (!digitp (s) || !digitp (s+1) || s[2] != '-')
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return 0;
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i = atoi_2 (s);
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if (i < 1 || i > 12)
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return 0;
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s += 3;
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if (!digitp (s) || !digitp (s+1))
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return 0;
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i = atoi_2 (s);
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if (i < 1 || i > 31)
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return 0;
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s += 2;
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if (!*s || *s == ',')
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return 1; /* Okay; only date given. */
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if (!spacep (s))
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return 0;
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if (date_only)
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return 1; /* Okay; only date was requested. */
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s++;
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if (spacep (s))
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return 1; /* Okay, second space stops scanning. */
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if (!digitp (s) || !digitp (s+1))
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return 0;
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i = atoi_2 (s);
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if (i < 0 || i > 23)
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return 0;
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s += 2;
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if (!*s || *s == ',')
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return 1; /* Okay; only date and hour given. */
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if (*s != ':')
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return 0;
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s++;
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if (!digitp (s) || !digitp (s+1))
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return 0;
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i = atoi_2 (s);
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if (i < 0 || i > 59)
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return 0;
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s += 2;
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if (!*s || *s == ',')
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return 1; /* Okay; only date, hour and minute given. */
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if (*s != ':')
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return 0;
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s++;
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if (!digitp (s) || !digitp (s+1))
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return 0;
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i = atoi_2 (s);
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if (i < 0 || i > 60)
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return 0;
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s += 2;
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if (!*s || *s == ',' || spacep (s))
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return 1; /* Okay; date, hour and minute and second given. */
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return 0; /* Unexpected delimiter. */
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}
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/* Convert a standard isotime or a human readable variant into an
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isotime structure. The allowed formats are those described by
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isotime_p and isotime_human_p. The function returns 0 on failure
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or the length of the scanned string on success. */
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size_t
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string2isotime (gnupg_isotime_t atime, const char *string)
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{
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gnupg_isotime_t dummyatime;
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if (!atime)
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atime = dummyatime;
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atime[0] = 0;
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if (isotime_p (string))
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{
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memcpy (atime, string, 15);
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atime[15] = 0;
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return 15;
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}
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if (!isotime_human_p (string, 0))
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return 0;
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atime[0] = string[0];
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atime[1] = string[1];
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atime[2] = string[2];
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atime[3] = string[3];
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atime[4] = string[5];
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atime[5] = string[6];
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atime[6] = string[8];
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atime[7] = string[9];
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atime[8] = 'T';
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memset (atime+9, '0', 6);
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atime[15] = 0;
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if (!spacep (string+10))
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return 10;
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if (spacep (string+11))
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return 11; /* As per def, second space stops scanning. */
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atime[9] = string[11];
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atime[10] = string[12];
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if (string[13] != ':')
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return 13;
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atime[11] = string[14];
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atime[12] = string[15];
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if (string[16] != ':')
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return 16;
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atime[13] = string[17];
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atime[14] = string[18];
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return 19;
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}
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/* Scan an ISO timestamp and return an Epoch based timestamp. The
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only supported format is "yyyymmddThhmmss[Z]" delimited by white
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space, nul, a colon or a comma. Returns (time_t)(-1) for an
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invalid string. */
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time_t
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isotime2epoch (const char *string)
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{
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int year, month, day, hour, minu, sec;
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struct tm tmbuf;
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if (!isotime_p (string))
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return (time_t)(-1);
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year = atoi_4 (string);
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month = atoi_2 (string + 4);
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day = atoi_2 (string + 6);
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hour = atoi_2 (string + 9);
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minu = atoi_2 (string + 11);
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sec = atoi_2 (string + 13);
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/* Basic checks. */
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if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31
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|| hour > 23 || minu > 59 || sec > 61 )
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return (time_t)(-1);
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memset (&tmbuf, 0, sizeof tmbuf);
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tmbuf.tm_sec = sec;
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tmbuf.tm_min = minu;
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tmbuf.tm_hour = hour;
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tmbuf.tm_mday = day;
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tmbuf.tm_mon = month-1;
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tmbuf.tm_year = year - 1900;
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tmbuf.tm_isdst = -1;
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return timegm (&tmbuf);
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}
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/* Convert an Epoch time to an iso time stamp. */
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void
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epoch2isotime (gnupg_isotime_t timebuf, time_t atime)
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{
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if (atime == (time_t)(-1))
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*timebuf = 0;
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else
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{
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struct tm *tp;
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#ifdef HAVE_GMTIME_R
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struct tm tmbuf;
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tp = gmtime_r (&atime, &tmbuf);
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#else
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tp = gmtime (&atime);
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#endif
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snprintf (timebuf, 16, "%04d%02d%02dT%02d%02d%02d",
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1900 + tp->tm_year, tp->tm_mon+1, tp->tm_mday,
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tp->tm_hour, tp->tm_min, tp->tm_sec);
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}
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}
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/* Parse a short ISO date string (YYYY-MM-DD) into a TM structure.
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Returns 0 on success. */
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int
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isodate_human_to_tm (const char *string, struct tm *t)
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{
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int year, month, day;
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if (!isotime_human_p (string, 1))
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return -1;
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year = atoi_4 (string);
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month = atoi_2 (string + 5);
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day = atoi_2 (string + 8);
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/* Basic checks. */
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if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31)
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return -1;
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memset (t, 0, sizeof *t);
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t->tm_sec = 0;
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t->tm_min = 0;
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t->tm_hour = 0;
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t->tm_mday = day;
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t->tm_mon = month-1;
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t->tm_year = year - 1900;
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t->tm_isdst = -1;
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return 0;
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}
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/* This function is a copy of gpgme/src/conversion.c:_gpgme_timegm.
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If you change it, then update the other one too. */
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#ifdef HAVE_W32_SYSTEM
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static time_t
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_win32_timegm (struct tm *tm)
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{
|
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/* This one is thread safe. */
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SYSTEMTIME st;
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FILETIME ft;
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unsigned long long cnsecs;
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st.wYear = tm->tm_year + 1900;
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st.wMonth = tm->tm_mon + 1;
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st.wDay = tm->tm_mday;
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st.wHour = tm->tm_hour;
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st.wMinute = tm->tm_min;
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st.wSecond = tm->tm_sec;
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st.wMilliseconds = 0; /* Not available. */
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st.wDayOfWeek = 0; /* Ignored. */
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/* System time is UTC thus the conversion is pretty easy. */
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if (!SystemTimeToFileTime (&st, &ft))
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{
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gpg_err_set_errno (EINVAL);
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return (time_t)(-1);
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}
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cnsecs = (((unsigned long long)ft.dwHighDateTime << 32)
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| ft.dwLowDateTime);
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cnsecs -= 116444736000000000ULL; /* The filetime epoch is 1601-01-01. */
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return (time_t)(cnsecs / 10000000ULL);
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}
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#endif
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|
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|
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/* Parse the string TIMESTAMP into a time_t. The string may either be
|
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seconds since Epoch or in the ISO 8601 format like
|
|
"20390815T143012". Returns 0 for an empty string or seconds since
|
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Epoch. Leading spaces are skipped. If ENDP is not NULL, it will
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point to the next non-parsed character in TIMESTRING.
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|
|
This function is a copy of
|
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gpgme/src/conversion.c:_gpgme_parse_timestamp. If you change it,
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then update the other one too. */
|
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time_t
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parse_timestamp (const char *timestamp, char **endp)
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{
|
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/* Need to skip leading spaces, because that is what strtoul does
|
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but not our ISO 8601 checking code. */
|
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while (*timestamp && *timestamp== ' ')
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timestamp++;
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if (!*timestamp)
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return 0;
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|
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if (strlen (timestamp) >= 15 && timestamp[8] == 'T')
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{
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struct tm buf;
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int year;
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year = atoi_4 (timestamp);
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if (year < 1900)
|
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return (time_t)(-1);
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|
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if (endp)
|
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*endp = (char*)(timestamp + 15);
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|
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/* Fixme: We would better use a configure test to see whether
|
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mktime can handle dates beyond 2038. */
|
|
if (sizeof (time_t) <= 4 && year >= 2038)
|
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return (time_t)2145914603; /* 2037-12-31 23:23:23 */
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|
|
memset (&buf, 0, sizeof buf);
|
|
buf.tm_year = year - 1900;
|
|
buf.tm_mon = atoi_2 (timestamp+4) - 1;
|
|
buf.tm_mday = atoi_2 (timestamp+6);
|
|
buf.tm_hour = atoi_2 (timestamp+9);
|
|
buf.tm_min = atoi_2 (timestamp+11);
|
|
buf.tm_sec = atoi_2 (timestamp+13);
|
|
|
|
#ifdef HAVE_W32_SYSTEM
|
|
return _win32_timegm (&buf);
|
|
#else
|
|
#ifdef HAVE_TIMEGM
|
|
return timegm (&buf);
|
|
#else
|
|
{
|
|
time_t tim;
|
|
|
|
putenv ("TZ=UTC");
|
|
tim = mktime (&buf);
|
|
#ifdef __GNUC__
|
|
#warning fixme: we must somehow reset TZ here. It is not threadsafe anyway.
|
|
#endif
|
|
return tim;
|
|
}
|
|
#endif /* !HAVE_TIMEGM */
|
|
#endif /* !HAVE_W32_SYSTEM */
|
|
}
|
|
else
|
|
return (time_t)strtoul (timestamp, endp, 10);
|
|
}
|
|
|
|
|
|
|
|
u32
|
|
add_days_to_timestamp( u32 stamp, u16 days )
|
|
{
|
|
return stamp + days*86400L;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Return a string with a time value in the form: x Y, n D, n H
|
|
*/
|
|
|
|
const char *
|
|
strtimevalue( u32 value )
|
|
{
|
|
static char buffer[30];
|
|
unsigned int years, days, hours, minutes;
|
|
|
|
value /= 60;
|
|
minutes = value % 60;
|
|
value /= 60;
|
|
hours = value % 24;
|
|
value /= 24;
|
|
days = value % 365;
|
|
value /= 365;
|
|
years = value;
|
|
|
|
sprintf(buffer,"%uy%ud%uh%um", years, days, hours, minutes );
|
|
if( years )
|
|
return buffer;
|
|
if( days )
|
|
return strchr( buffer, 'y' ) + 1;
|
|
return strchr( buffer, 'd' ) + 1;
|
|
}
|
|
|
|
|
|
|
|
/* Return a malloced string with the time elapsed between NOW and
|
|
SINCE. May return NULL on error. */
|
|
char *
|
|
elapsed_time_string (time_t since, time_t now)
|
|
{
|
|
char *result;
|
|
double diff;
|
|
unsigned long value;
|
|
unsigned int days, hours, minutes, seconds;
|
|
|
|
if (!now)
|
|
now = gnupg_get_time ();
|
|
|
|
diff = difftime (now, since);
|
|
if (diff < 0)
|
|
return xtrystrdup ("time-warp");
|
|
|
|
seconds = (unsigned long)diff % 60;
|
|
value = (unsigned long)(diff / 60);
|
|
minutes = value % 60;
|
|
value /= 60;
|
|
hours = value % 24;
|
|
value /= 24;
|
|
days = value % 365;
|
|
|
|
if (days)
|
|
result = xtryasprintf ("%ud%uh%um%us", days, hours, minutes, seconds);
|
|
else if (hours)
|
|
result = xtryasprintf ("%uh%um%us", hours, minutes, seconds);
|
|
else if (minutes)
|
|
result = xtryasprintf ("%um%us", minutes, seconds);
|
|
else
|
|
result = xtryasprintf ("%us", seconds);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* Note: this function returns GMT
|
|
*/
|
|
const char *
|
|
strtimestamp (u32 stamp)
|
|
{
|
|
static char buffer[11+5];
|
|
struct tm *tp;
|
|
time_t atime = stamp;
|
|
|
|
if (IS_INVALID_TIME_T (atime))
|
|
{
|
|
strcpy (buffer, "????" "-??" "-??");
|
|
}
|
|
else
|
|
{
|
|
tp = gmtime( &atime );
|
|
snprintf (buffer, sizeof buffer, "%04d-%02d-%02d",
|
|
1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday );
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
|
|
/*
|
|
* Note: this function returns GMT
|
|
*/
|
|
const char *
|
|
isotimestamp (u32 stamp)
|
|
{
|
|
static char buffer[25+5];
|
|
struct tm *tp;
|
|
time_t atime = stamp;
|
|
|
|
if (IS_INVALID_TIME_T (atime))
|
|
{
|
|
strcpy (buffer, "????" "-??" "-??" " " "??" ":" "??" ":" "??");
|
|
}
|
|
else
|
|
{
|
|
tp = gmtime ( &atime );
|
|
snprintf (buffer, sizeof buffer, "%04d-%02d-%02d %02d:%02d:%02d",
|
|
1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday,
|
|
tp->tm_hour, tp->tm_min, tp->tm_sec);
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Note: this function returns local time
|
|
*/
|
|
const char *
|
|
asctimestamp (u32 stamp)
|
|
{
|
|
static char buffer[80];
|
|
#if defined (HAVE_STRFTIME) && defined (HAVE_NL_LANGINFO)
|
|
static char fmt[80];
|
|
#endif
|
|
struct tm *tp;
|
|
time_t atime = stamp;
|
|
|
|
if (IS_INVALID_TIME_T (atime))
|
|
{
|
|
strcpy (buffer, "????" "-??" "-??");
|
|
return buffer;
|
|
}
|
|
|
|
tp = localtime( &atime );
|
|
#ifdef HAVE_STRFTIME
|
|
# if defined(HAVE_NL_LANGINFO)
|
|
mem2str( fmt, nl_langinfo(D_T_FMT), DIM(fmt)-3 );
|
|
if (!strstr( fmt, "%Z" ))
|
|
strcat( fmt, " %Z");
|
|
/* NOTE: gcc -Wformat-noliteral will complain here. I have found no
|
|
way to suppress this warning. */
|
|
strftime (buffer, DIM(buffer)-1, fmt, tp);
|
|
# elif defined(HAVE_W32CE_SYSTEM)
|
|
/* tzset is not available but %Z nevertheless prints a default
|
|
nonsense timezone ("WILDABBR"). Thus we don't print the time
|
|
zone at all. */
|
|
strftime (buffer, DIM(buffer)-1, "%c", tp);
|
|
# else
|
|
# if HAVE_W32_SYSTEM
|
|
{
|
|
static int done;
|
|
|
|
if (!done)
|
|
{
|
|
/* The locale names as used by Windows are in the form
|
|
* "German_Germany.1252" or "German_Austria.1252" with
|
|
* alternate names similar to Unix, e.g. "de-DE". However
|
|
* that is the theory. On current Windows and Mingw the
|
|
* alternate names do not work. We would need a table to map
|
|
* them from the short names as provided by gpgrt to the long
|
|
* names and append some code page. For now we use "" and
|
|
* take the locale from the user's system settings. Thus the
|
|
* standard Unix envvars don't work for time and may mismatch
|
|
* with the string translations. The new UCRT available since
|
|
* 2018 has a lot of additional support but that will for sure
|
|
* break other things. We should move to ISO strings to get
|
|
* rid of such problems. */
|
|
setlocale (LC_TIME, "");
|
|
done = 1;
|
|
/* log_debug ("LC_ALL now '%s'\n", setlocale (LC_ALL, NULL)); */
|
|
/* log_debug ("LC_TIME now '%s'\n", setlocale (LC_TIME, NULL)); */
|
|
}
|
|
}
|
|
# endif
|
|
/* FIXME: we should check whether the locale appends a " %Z" These
|
|
* locales from glibc don't put the " %Z": fi_FI hr_HR ja_JP lt_LT
|
|
* lv_LV POSIX ru_RU ru_SU sv_FI sv_SE zh_CN. */
|
|
strftime (buffer, DIM(buffer)-1, "%c %Z", tp);
|
|
# endif
|
|
buffer[DIM(buffer)-1] = 0;
|
|
#else
|
|
mem2str( buffer, asctime(tp), DIM(buffer) );
|
|
#endif
|
|
return buffer;
|
|
}
|
|
|
|
|
|
/* Return the timestamp STAMP in RFC-2822 format. This is always done
|
|
* in the C locale. We return the gmtime to avoid computing the
|
|
* timezone. The caller must release the returned string.
|
|
*
|
|
* Example: "Mon, 27 Jun 2016 1:42:00 +0000".
|
|
*/
|
|
char *
|
|
rfctimestamp (u32 stamp)
|
|
{
|
|
time_t atime = stamp;
|
|
struct tm tmbuf, *tp;
|
|
|
|
|
|
if (IS_INVALID_TIME_T (atime))
|
|
{
|
|
gpg_err_set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
|
|
tp = gnupg_gmtime (&atime, &tmbuf);
|
|
if (!tp)
|
|
return NULL;
|
|
return xtryasprintf ("%.3s, %02d %.3s %04d %02d:%02d:%02d +0000",
|
|
&"SunMonTueWedThuFriSat"[(tp->tm_wday%7)*3],
|
|
tp->tm_mday,
|
|
&"JanFebMarAprMayJunJulAugSepOctNovDec"
|
|
[(tp->tm_mon%12)*3],
|
|
tp->tm_year + 1900,
|
|
tp->tm_hour,
|
|
tp->tm_min,
|
|
tp->tm_sec);
|
|
}
|
|
|
|
|
|
static int
|
|
days_per_year (int y)
|
|
{
|
|
int s ;
|
|
|
|
s = !(y % 4);
|
|
if ( !(y % 100))
|
|
if ((y%400))
|
|
s = 0;
|
|
return s ? 366 : 365;
|
|
}
|
|
|
|
static int
|
|
days_per_month (int y, int m)
|
|
{
|
|
int s;
|
|
|
|
switch(m)
|
|
{
|
|
case 1: case 3: case 5: case 7: case 8: case 10: case 12:
|
|
return 31 ;
|
|
case 2:
|
|
s = !(y % 4);
|
|
if (!(y % 100))
|
|
if ((y % 400))
|
|
s = 0;
|
|
return s? 29 : 28 ;
|
|
case 4: case 6: case 9: case 11:
|
|
return 30;
|
|
}
|
|
BUG();
|
|
}
|
|
|
|
|
|
/* Convert YEAR, MONTH and DAY into the Julian date. We assume that
|
|
it is already noon. We do not support dates before 1582-10-15. */
|
|
static unsigned long
|
|
date2jd (int year, int month, int day)
|
|
{
|
|
unsigned long jd;
|
|
|
|
jd = 365L * year + 31 * (month-1) + day + JD_DIFF;
|
|
if (month < 3)
|
|
year-- ;
|
|
else
|
|
jd -= (4 * month + 23) / 10;
|
|
|
|
jd += year / 4 - ((year / 100 + 1) *3) / 4;
|
|
|
|
return jd ;
|
|
}
|
|
|
|
/* Convert a Julian date back to YEAR, MONTH and DAY. Return day of
|
|
the year or 0 on error. This function uses some more or less
|
|
arbitrary limits, most important is that days before 1582 are not
|
|
supported. */
|
|
static int
|
|
jd2date (unsigned long jd, int *year, int *month, int *day)
|
|
{
|
|
int y, m, d;
|
|
long delta;
|
|
|
|
if (!jd)
|
|
return 0 ;
|
|
if (jd < 1721425 || jd > 2843085)
|
|
return 0;
|
|
|
|
y = (jd - JD_DIFF) / 366;
|
|
d = m = 1;
|
|
|
|
while ((delta = jd - date2jd (y, m, d)) > days_per_year (y))
|
|
y++;
|
|
|
|
m = (delta / 31) + 1;
|
|
while( (delta = jd - date2jd (y, m, d)) > days_per_month (y,m))
|
|
if (++m > 12)
|
|
{
|
|
m = 1;
|
|
y++;
|
|
}
|
|
|
|
d = delta + 1 ;
|
|
if (d > days_per_month (y, m))
|
|
{
|
|
d = 1;
|
|
m++;
|
|
}
|
|
if (m > 12)
|
|
{
|
|
m = 1;
|
|
y++;
|
|
}
|
|
|
|
if (year)
|
|
*year = y;
|
|
if (month)
|
|
*month = m;
|
|
if (day)
|
|
*day = d ;
|
|
|
|
return (jd - date2jd (y, 1, 1)) + 1;
|
|
}
|
|
|
|
|
|
/* Check that the 15 bytes in ATIME represent a valid ISO time. Note
|
|
that this function does not expect a string but a plain 15 byte
|
|
isotime buffer. */
|
|
gpg_error_t
|
|
check_isotime (const gnupg_isotime_t atime)
|
|
{
|
|
int i;
|
|
const char *s;
|
|
|
|
if (!*atime)
|
|
return gpg_error (GPG_ERR_NO_VALUE);
|
|
|
|
for (s=atime, i=0; i < 8; i++, s++)
|
|
if (!digitp (s))
|
|
return gpg_error (GPG_ERR_INV_TIME);
|
|
if (*s != 'T')
|
|
return gpg_error (GPG_ERR_INV_TIME);
|
|
for (s++, i=9; i < 15; i++, s++)
|
|
if (!digitp (s))
|
|
return gpg_error (GPG_ERR_INV_TIME);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Dump the ISO time T to the log stream without a LF. */
|
|
void
|
|
dump_isotime (const gnupg_isotime_t t)
|
|
{
|
|
if (!t || !*t)
|
|
log_printf ("%s", _("[none]"));
|
|
else
|
|
log_printf ("%.4s-%.2s-%.2s %.2s:%.2s:%s",
|
|
t, t+4, t+6, t+9, t+11, t+13);
|
|
}
|
|
|
|
|
|
/* Copy one ISO date to another, this is inline so that we can do a
|
|
minimal sanity check. A null date (empty string) is allowed. */
|
|
void
|
|
gnupg_copy_time (gnupg_isotime_t d, const gnupg_isotime_t s)
|
|
{
|
|
if (*s)
|
|
{
|
|
if ((strlen (s) != 15 || s[8] != 'T'))
|
|
BUG();
|
|
memcpy (d, s, 15);
|
|
d[15] = 0;
|
|
}
|
|
else
|
|
*d = 0;
|
|
}
|
|
|
|
|
|
/* Add SECONDS to ATIME. SECONDS may not be negative and is limited
|
|
to about the equivalent of 62 years which should be more then
|
|
enough for our purposes. */
|
|
gpg_error_t
|
|
add_seconds_to_isotime (gnupg_isotime_t atime, int nseconds)
|
|
{
|
|
gpg_error_t err;
|
|
int year, month, day, hour, minute, sec, ndays;
|
|
unsigned long jd;
|
|
|
|
err = check_isotime (atime);
|
|
if (err)
|
|
return err;
|
|
|
|
if (nseconds < 0 || nseconds >= (0x7fffffff - 61) )
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
year = atoi_4 (atime+0);
|
|
month = atoi_2 (atime+4);
|
|
day = atoi_2 (atime+6);
|
|
hour = atoi_2 (atime+9);
|
|
minute= atoi_2 (atime+11);
|
|
sec = atoi_2 (atime+13);
|
|
|
|
if (year <= 1582) /* The julian date functions don't support this. */
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
sec += nseconds;
|
|
minute += sec/60;
|
|
sec %= 60;
|
|
hour += minute/60;
|
|
minute %= 60;
|
|
ndays = hour/24;
|
|
hour %= 24;
|
|
|
|
jd = date2jd (year, month, day) + ndays;
|
|
jd2date (jd, &year, &month, &day);
|
|
|
|
if (year > 9999 || month > 12 || day > 31
|
|
|| year < 0 || month < 1 || day < 1)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
snprintf (atime, 16, "%04d%02d%02dT%02d%02d%02d",
|
|
year, month, day, hour, minute, sec);
|
|
return 0;
|
|
}
|
|
|
|
|
|
gpg_error_t
|
|
add_days_to_isotime (gnupg_isotime_t atime, int ndays)
|
|
{
|
|
gpg_error_t err;
|
|
int year, month, day, hour, minute, sec;
|
|
unsigned long jd;
|
|
|
|
err = check_isotime (atime);
|
|
if (err)
|
|
return err;
|
|
|
|
if (ndays < 0 || ndays >= 9999*366 )
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
year = atoi_4 (atime+0);
|
|
month = atoi_2 (atime+4);
|
|
day = atoi_2 (atime+6);
|
|
hour = atoi_2 (atime+9);
|
|
minute= atoi_2 (atime+11);
|
|
sec = atoi_2 (atime+13);
|
|
|
|
if (year <= 1582) /* The julian date functions don't support this. */
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
jd = date2jd (year, month, day) + ndays;
|
|
jd2date (jd, &year, &month, &day);
|
|
|
|
if (year > 9999 || month > 12 || day > 31
|
|
|| year < 0 || month < 1 || day < 1)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
snprintf (atime, 16, "%04d%02d%02dT%02d%02d%02d",
|
|
year, month, day, hour, minute, sec);
|
|
return 0;
|
|
}
|