mirror of
git://git.gnupg.org/gnupg.git
synced 2024-09-06 12:46:22 +02:00
760 lines
17 KiB
C
760 lines
17 KiB
C
/* gettime.c - Wrapper for time functions
|
|
* Copyright (C) 1998, 2002, 2007, 2011 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of GnuPG.
|
|
*
|
|
* GnuPG is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GnuPG is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <ctype.h>
|
|
#ifdef HAVE_LANGINFO_H
|
|
#include <langinfo.h>
|
|
#endif
|
|
|
|
#include "util.h"
|
|
#include "i18n.h"
|
|
#include "gettime.h"
|
|
|
|
#ifdef HAVE_UNSIGNED_TIME_T
|
|
# define IS_INVALID_TIME_T(a) ((a) == (time_t)(-1))
|
|
#else
|
|
/* Error or 32 bit time_t and value after 2038-01-19. */
|
|
# define IS_INVALID_TIME_T(a) ((a) < 0)
|
|
#endif
|
|
|
|
|
|
static unsigned long timewarp;
|
|
static enum { NORMAL = 0, FROZEN, FUTURE, PAST } timemode;
|
|
|
|
/* Correction used to map to real Julian days. */
|
|
#define JD_DIFF 1721060L
|
|
|
|
|
|
/* Wrapper for the time(3). We use this here so we can fake the time
|
|
for tests */
|
|
time_t
|
|
gnupg_get_time ()
|
|
{
|
|
time_t current = time (NULL);
|
|
if (timemode == NORMAL)
|
|
return current;
|
|
else if (timemode == FROZEN)
|
|
return timewarp;
|
|
else if (timemode == FUTURE)
|
|
return current + timewarp;
|
|
else
|
|
return current - timewarp;
|
|
}
|
|
|
|
|
|
/* Return the current time (possibly faked) in ISO format. */
|
|
void
|
|
gnupg_get_isotime (gnupg_isotime_t timebuf)
|
|
{
|
|
time_t atime = gnupg_get_time ();
|
|
|
|
if (atime == (time_t)(-1))
|
|
*timebuf = 0;
|
|
else
|
|
{
|
|
struct tm *tp;
|
|
#ifdef HAVE_GMTIME_R
|
|
struct tm tmbuf;
|
|
|
|
tp = gmtime_r (&atime, &tmbuf);
|
|
#else
|
|
tp = gmtime (&atime);
|
|
#endif
|
|
snprintf (timebuf, 16, "%04d%02d%02dT%02d%02d%02d",
|
|
1900 + tp->tm_year, tp->tm_mon+1, tp->tm_mday,
|
|
tp->tm_hour, tp->tm_min, tp->tm_sec);
|
|
}
|
|
}
|
|
|
|
|
|
/* Set the time to NEWTIME so that gnupg_get_time returns a time
|
|
starting with this one. With FREEZE set to 1 the returned time
|
|
will never change. Just for completeness, a value of (time_t)-1
|
|
for NEWTIME gets you back to reality. Note that this is obviously
|
|
not thread-safe but this is not required. */
|
|
void
|
|
gnupg_set_time (time_t newtime, int freeze)
|
|
{
|
|
time_t current = time (NULL);
|
|
|
|
if ( newtime == (time_t)-1 || current == newtime)
|
|
{
|
|
timemode = NORMAL;
|
|
timewarp = 0;
|
|
}
|
|
else if (freeze)
|
|
{
|
|
timemode = FROZEN;
|
|
timewarp = current;
|
|
}
|
|
else if (newtime > current)
|
|
{
|
|
timemode = FUTURE;
|
|
timewarp = newtime - current;
|
|
}
|
|
else
|
|
{
|
|
timemode = PAST;
|
|
timewarp = current - newtime;
|
|
}
|
|
}
|
|
|
|
/* Returns true when we are in timewarp mode */
|
|
int
|
|
gnupg_faked_time_p (void)
|
|
{
|
|
return timemode;
|
|
}
|
|
|
|
|
|
/* This function is used by gpg because OpenPGP defines the timestamp
|
|
as an unsigned 32 bit value. */
|
|
u32
|
|
make_timestamp (void)
|
|
{
|
|
time_t t = gnupg_get_time ();
|
|
|
|
if (t == (time_t)-1)
|
|
log_fatal ("gnupg_get_time() failed\n");
|
|
return (u32)t;
|
|
}
|
|
|
|
|
|
|
|
/****************
|
|
* Scan a date string and return a timestamp.
|
|
* The only supported format is "yyyy-mm-dd"
|
|
* Returns 0 for an invalid date.
|
|
*/
|
|
u32
|
|
scan_isodatestr( const char *string )
|
|
{
|
|
int year, month, day;
|
|
struct tm tmbuf;
|
|
time_t stamp;
|
|
int i;
|
|
|
|
if( strlen(string) != 10 || string[4] != '-' || string[7] != '-' )
|
|
return 0;
|
|
for( i=0; i < 4; i++ )
|
|
if( !digitp (string+i) )
|
|
return 0;
|
|
if( !digitp (string+5) || !digitp(string+6) )
|
|
return 0;
|
|
if( !digitp(string+8) || !digitp(string+9) )
|
|
return 0;
|
|
year = atoi(string);
|
|
month = atoi(string+5);
|
|
day = atoi(string+8);
|
|
/* some basic checks */
|
|
if( year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 )
|
|
return 0;
|
|
memset( &tmbuf, 0, sizeof tmbuf );
|
|
tmbuf.tm_mday = day;
|
|
tmbuf.tm_mon = month-1;
|
|
tmbuf.tm_year = year - 1900;
|
|
tmbuf.tm_isdst = -1;
|
|
stamp = mktime( &tmbuf );
|
|
if( stamp == (time_t)-1 )
|
|
return 0;
|
|
return stamp;
|
|
}
|
|
|
|
|
|
int
|
|
isotime_p (const char *string)
|
|
{
|
|
const char *s;
|
|
int i;
|
|
|
|
if (!*string)
|
|
return 0;
|
|
for (s=string, i=0; i < 8; i++, s++)
|
|
if (!digitp (s))
|
|
return 0;
|
|
if (*s != 'T')
|
|
return 0;
|
|
for (s++, i=9; i < 15; i++, s++)
|
|
if (!digitp (s))
|
|
return 0;
|
|
if ( !(!*s || (isascii (*s) && isspace(*s)) || *s == ':' || *s == ','))
|
|
return 0; /* Wrong delimiter. */
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* Scan a string and return true if the string represents the human
|
|
readable format of an ISO time. This format is:
|
|
yyyy-mm-dd[ hh[:mm[:ss]]]
|
|
Scanning stops at the second space or at a comma. */
|
|
int
|
|
isotime_human_p (const char *string)
|
|
{
|
|
const char *s;
|
|
int i;
|
|
|
|
if (!*string)
|
|
return 0;
|
|
for (s=string, i=0; i < 4; i++, s++)
|
|
if (!digitp (s))
|
|
return 0;
|
|
if (*s != '-')
|
|
return 0;
|
|
s++;
|
|
if (!digitp (s) || !digitp (s+1) || s[2] != '-')
|
|
return 0;
|
|
i = atoi_2 (s);
|
|
if (i < 1 || i > 12)
|
|
return 0;
|
|
s += 3;
|
|
if (!digitp (s) || !digitp (s+1))
|
|
return 0;
|
|
i = atoi_2 (s);
|
|
if (i < 1 || i > 31)
|
|
return 0;
|
|
s += 2;
|
|
if (!*s || *s == ',')
|
|
return 1; /* Okay; only date given. */
|
|
if (!spacep (s))
|
|
return 0;
|
|
s++;
|
|
if (spacep (s))
|
|
return 1; /* Okay, second space stops scanning. */
|
|
if (!digitp (s) || !digitp (s+1))
|
|
return 0;
|
|
i = atoi_2 (s);
|
|
if (i < 0 || i > 23)
|
|
return 0;
|
|
s += 2;
|
|
if (!*s || *s == ',')
|
|
return 1; /* Okay; only date and hour given. */
|
|
if (*s != ':')
|
|
return 0;
|
|
s++;
|
|
if (!digitp (s) || !digitp (s+1))
|
|
return 0;
|
|
i = atoi_2 (s);
|
|
if (i < 0 || i > 59)
|
|
return 0;
|
|
s += 2;
|
|
if (!*s || *s == ',')
|
|
return 1; /* Okay; only date, hour and minute given. */
|
|
if (*s != ':')
|
|
return 0;
|
|
s++;
|
|
if (!digitp (s) || !digitp (s+1))
|
|
return 0;
|
|
i = atoi_2 (s);
|
|
if (i < 0 || i > 60)
|
|
return 0;
|
|
s += 2;
|
|
if (!*s || *s == ',' || spacep (s))
|
|
return 1; /* Okay; date, hour and minute and second given. */
|
|
|
|
return 0; /* Unexpected delimiter. */
|
|
}
|
|
|
|
/* Convert a standard isotime or a human readable variant into an
|
|
isotime structure. The allowed formats are those described by
|
|
isotime_p and isotime_human_p. The function returns 0 on failure
|
|
or the length of the scanned string on success. */
|
|
size_t
|
|
string2isotime (gnupg_isotime_t atime, const char *string)
|
|
{
|
|
gnupg_isotime_t dummyatime;
|
|
|
|
if (!atime)
|
|
atime = dummyatime;
|
|
|
|
atime[0] = 0;
|
|
if (isotime_p (string))
|
|
{
|
|
memcpy (atime, string, 15);
|
|
atime[15] = 0;
|
|
return 15;
|
|
}
|
|
if (!isotime_human_p (string))
|
|
return 0;
|
|
atime[0] = string[0];
|
|
atime[1] = string[1];
|
|
atime[2] = string[2];
|
|
atime[3] = string[3];
|
|
atime[4] = string[5];
|
|
atime[5] = string[6];
|
|
atime[6] = string[8];
|
|
atime[7] = string[9];
|
|
atime[8] = 'T';
|
|
memset (atime+9, '0', 6);
|
|
atime[15] = 0;
|
|
if (!spacep (string+10))
|
|
return 10;
|
|
if (spacep (string+11))
|
|
return 11; /* As per def, second space stops scanning. */
|
|
atime[9] = string[11];
|
|
atime[10] = string[12];
|
|
if (string[13] != ':')
|
|
return 13;
|
|
atime[11] = string[14];
|
|
atime[12] = string[15];
|
|
if (string[16] != ':')
|
|
return 16;
|
|
atime[13] = string[17];
|
|
atime[14] = string[18];
|
|
return 19;
|
|
}
|
|
|
|
|
|
/* Scan an ISO timestamp and return an Epoch based timestamp. The only
|
|
supported format is "yyyymmddThhmmss" delimited by white space, nul, a
|
|
colon or a comma. Returns (time_t)(-1) for an invalid string. */
|
|
time_t
|
|
isotime2epoch (const char *string)
|
|
{
|
|
int year, month, day, hour, minu, sec;
|
|
struct tm tmbuf;
|
|
|
|
if (!isotime_p (string))
|
|
return (time_t)(-1);
|
|
|
|
year = atoi_4 (string);
|
|
month = atoi_2 (string + 4);
|
|
day = atoi_2 (string + 6);
|
|
hour = atoi_2 (string + 9);
|
|
minu = atoi_2 (string + 11);
|
|
sec = atoi_2 (string + 13);
|
|
|
|
/* Basic checks. */
|
|
if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31
|
|
|| hour > 23 || minu > 59 || sec > 61 )
|
|
return (time_t)(-1);
|
|
|
|
memset (&tmbuf, 0, sizeof tmbuf);
|
|
tmbuf.tm_sec = sec;
|
|
tmbuf.tm_min = minu;
|
|
tmbuf.tm_hour = hour;
|
|
tmbuf.tm_mday = day;
|
|
tmbuf.tm_mon = month-1;
|
|
tmbuf.tm_year = year - 1900;
|
|
tmbuf.tm_isdst = -1;
|
|
return timegm (&tmbuf);
|
|
}
|
|
|
|
|
|
/* Convert an Epoch time to an iso time stamp. */
|
|
void
|
|
epoch2isotime (gnupg_isotime_t timebuf, time_t atime)
|
|
{
|
|
if (atime == (time_t)(-1))
|
|
*timebuf = 0;
|
|
else
|
|
{
|
|
struct tm *tp;
|
|
#ifdef HAVE_GMTIME_R
|
|
struct tm tmbuf;
|
|
|
|
tp = gmtime_r (&atime, &tmbuf);
|
|
#else
|
|
tp = gmtime (&atime);
|
|
#endif
|
|
snprintf (timebuf, 16, "%04d%02d%02dT%02d%02d%02d",
|
|
1900 + tp->tm_year, tp->tm_mon+1, tp->tm_mday,
|
|
tp->tm_hour, tp->tm_min, tp->tm_sec);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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[50];
|
|
#if defined (HAVE_STRFTIME) && defined (HAVE_NL_LANGINFO)
|
|
static char fmt[50];
|
|
#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
|
|
/* 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;
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
}
|