#include "util_time.h"
#define AP_CTIME_USEC_LENGTH 7
#define AP_CTIME_COMPACT_LEN 20
struct exploded_time_cache_element {
apr_int64_t t;
apr_time_exp_t xt;
apr_int64_t t_validate;
};
#define TIME_CACHE_SIZE (AP_TIME_RECENT_THRESHOLD + 1)
#define TIME_CACHE_MASK (AP_TIME_RECENT_THRESHOLD)
static struct exploded_time_cache_element exploded_cache_localtime[TIME_CACHE_SIZE];
static struct exploded_time_cache_element exploded_cache_gmt[TIME_CACHE_SIZE];
static apr_status_t cached_explode(apr_time_exp_t *xt, apr_time_t t,
struct exploded_time_cache_element *cache,
int use_gmt)
{
apr_int64_t seconds = apr_time_sec(t);
struct exploded_time_cache_element *cache_element =
&(cache[seconds & TIME_CACHE_MASK]);
struct exploded_time_cache_element cache_element_snapshot;
if (cache_element->t >= seconds) {
memcpy(&cache_element_snapshot, cache_element,
sizeof(struct exploded_time_cache_element));
if ((seconds != cache_element_snapshot.t) ||
(seconds != cache_element_snapshot.t_validate)) {
if (use_gmt) {
return apr_time_exp_gmt(xt, t);
}
else {
return apr_time_exp_lt(xt, t);
}
}
else {
memcpy(xt, &(cache_element_snapshot.xt),
sizeof(apr_time_exp_t));
}
}
else {
apr_status_t r;
if (use_gmt) {
r = apr_time_exp_gmt(xt, t);
}
else {
r = apr_time_exp_lt(xt, t);
}
if (r != APR_SUCCESS) {
return r;
}
cache_element->t = seconds;
memcpy(&(cache_element->xt), xt, sizeof(apr_time_exp_t));
cache_element->t_validate = seconds;
}
xt->tm_usec = (int)apr_time_usec(t);
return APR_SUCCESS;
}
AP_DECLARE(apr_status_t) ap_explode_recent_localtime(apr_time_exp_t * tm,
apr_time_t t)
{
return cached_explode(tm, t, exploded_cache_localtime, 0);
}
AP_DECLARE(apr_status_t) ap_explode_recent_gmt(apr_time_exp_t * tm,
apr_time_t t)
{
return cached_explode(tm, t, exploded_cache_gmt, 1);
}
AP_DECLARE(apr_status_t) ap_recent_ctime(char *date_str, apr_time_t t)
{
int len = APR_CTIME_LEN;
return ap_recent_ctime_ex(date_str, t, AP_CTIME_OPTION_NONE, &len);
}
AP_DECLARE(apr_status_t) ap_recent_ctime_ex(char *date_str, apr_time_t t,
int option, int *len)
{
apr_time_exp_t xt;
const char *s;
int real_year;
int needed;
if (option & AP_CTIME_OPTION_COMPACT)
needed = AP_CTIME_COMPACT_LEN;
else
needed = APR_CTIME_LEN;
if (option & AP_CTIME_OPTION_USEC) {
needed += AP_CTIME_USEC_LENGTH;
}
if (len && *len >= needed) {
*len = needed;
}
else {
if (len != NULL) {
*len = 0;
}
return APR_ENOMEM;
}
ap_explode_recent_localtime(&xt, t);
real_year = 1900 + xt.tm_year;
if (option & AP_CTIME_OPTION_COMPACT) {
int real_month = xt.tm_mon + 1;
*date_str++ = real_year / 1000 + '0';
*date_str++ = real_year % 1000 / 100 + '0';
*date_str++ = real_year % 100 / 10 + '0';
*date_str++ = real_year % 10 + '0';
*date_str++ = '-';
*date_str++ = real_month / 10 + '0';
*date_str++ = real_month % 10 + '0';
*date_str++ = '-';
}
else {
s = &apr_day_snames[xt.tm_wday][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
s = &apr_month_snames[xt.tm_mon][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
}
*date_str++ = xt.tm_mday / 10 + '0';
*date_str++ = xt.tm_mday % 10 + '0';
*date_str++ = ' ';
*date_str++ = xt.tm_hour / 10 + '0';
*date_str++ = xt.tm_hour % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_min / 10 + '0';
*date_str++ = xt.tm_min % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_sec / 10 + '0';
*date_str++ = xt.tm_sec % 10 + '0';
if (option & AP_CTIME_OPTION_USEC) {
int div;
int usec = (int)xt.tm_usec;
*date_str++ = '.';
for (div=100000; div>0; div=div/10) {
*date_str++ = usec / div + '0';
usec = usec % div;
}
}
if (!(option & AP_CTIME_OPTION_COMPACT)) {
*date_str++ = ' ';
*date_str++ = real_year / 1000 + '0';
*date_str++ = real_year % 1000 / 100 + '0';
*date_str++ = real_year % 100 / 10 + '0';
*date_str++ = real_year % 10 + '0';
}
*date_str++ = 0;
return APR_SUCCESS;
}
AP_DECLARE(apr_status_t) ap_recent_rfc822_date(char *date_str, apr_time_t t)
{
apr_time_exp_t xt;
const char *s;
int real_year;
ap_explode_recent_gmt(&xt, t);
s = &apr_day_snames[xt.tm_wday][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ',';
*date_str++ = ' ';
*date_str++ = xt.tm_mday / 10 + '0';
*date_str++ = xt.tm_mday % 10 + '0';
*date_str++ = ' ';
s = &apr_month_snames[xt.tm_mon][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
real_year = 1900 + xt.tm_year;
*date_str++ = real_year / 1000 + '0';
*date_str++ = real_year % 1000 / 100 + '0';
*date_str++ = real_year % 100 / 10 + '0';
*date_str++ = real_year % 10 + '0';
*date_str++ = ' ';
*date_str++ = xt.tm_hour / 10 + '0';
*date_str++ = xt.tm_hour % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_min / 10 + '0';
*date_str++ = xt.tm_min % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_sec / 10 + '0';
*date_str++ = xt.tm_sec % 10 + '0';
*date_str++ = ' ';
*date_str++ = 'G';
*date_str++ = 'M';
*date_str++ = 'T';
*date_str++ = 0;
return APR_SUCCESS;
}