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strptime is locale-dependent, re-implement for C locale-only

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Christian Grothoff 2021-01-26 14:10:06 +01:00
parent 6cd6582a4f
commit 2b35e3796f
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1 changed files with 75 additions and 18 deletions
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93
src/lib/exchange_api_handle.c
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@ -1298,38 +1298,95 @@ TEAH_path_to_url (struct TALER_EXCHANGE_Handle *h,
}
/**
* Define a max length for the HTTP "Expire:" header
*/
#define MAX_DATE_LINE_LEN 32
/**
* Parse HTTP timestamp.
*
* @param date header to parse header
* @param dateline header to parse header
* @param at where to write the result
* @return #GNUNET_OK on success
*/
static int
parse_date_string (const char *date,
parse_date_string (const char *dateline,
struct GNUNET_TIME_Absolute *at)
{
struct tm now;
static const char *MONTHS[] =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL };
int year;
int mon;
int day;
int hour;
int min;
int sec;
char month[4];
struct tm tm;
time_t t;
const char *end;
memset (&now,
0,
sizeof (now));
end = strptime (date,
"%a, %d %b %Y %H:%M:%S %Z", /* RFC-1123 standard spec */
&now);
if ( (NULL == end) ||
( (*end != '\n') &&
(*end != '\r') ) )
/* We recognize the three formats in RFC2616, section 3.3.1. Month
names are always in English. The formats are:
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
Note that the first is preferred.
*/
if (strlen (dateline) > MAX_DATE_LINE_LEN)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not parse date input `%s', failure at `%s'\n",
date,
end);
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
t = mktime (&now);
while (*dateline == ' ')
++dateline;
while (*dateline && *dateline != ' ')
++dateline;
while (*dateline == ' ')
++dateline;
/* We just skipped over the day of the week. Now we have:*/
if ( (sscanf (dateline,
"%d %3s %d %d:%d:%d",
&day, month, &year, &hour, &min, &sec) != 6) &&
(sscanf (dateline,
"%d-%3s-%d %d:%d:%d",
&day, month, &year, &hour, &min, &sec) != 6) &&
(sscanf (dateline,
"%3s %d %d:%d:%d %d",
month, &day, &hour, &min, &sec, &year) != 6) )
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
/* Two digit dates are defined to be relative to 1900; all other dates
* are supposed to be represented as four digits. */
if (year < 100)
year += 1900;
for (mon = 0; ; mon++)
{
if (! MONTHS[mon])
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (0 == strcasecmp (month,
MONTHS[mon]))
break;
}
memset (&tm, 0, sizeof(tm));
tm.tm_year = year - 1900;
tm.tm_mon = mon;
tm.tm_mday = day;
tm.tm_hour = hour;
tm.tm_min = min;
tm.tm_sec = sec;
t = mktime (&tm);
if (((time_t) -1) == t)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,