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//
// MCLibetpan.cpp
// mailcore2
//
// Created by Hoa Dinh on 6/28/13.
// Copyright (c) 2013 MailCore. All rights reserved.
//
#include "MCWin32.h" // should be included first.
#include "MCLibetpan.h"
#include <libetpan/libetpan.h>
#include "MCDefines.h"
using namespace mailcore;
static int tmcomp(struct tm * atmp, struct tm * btmp);
INITIALIZE(Libetpan)
{
// It will enable CFStream on platforms that supports it.
mailstream_cfstream_enabled = 1;
}
time_t mailcore::timestampFromDate(struct mailimf_date_time * date_time)
{
struct tm tmval;
time_t timeval;
int zone_min;
int zone_hour;
tmval.tm_sec = date_time->dt_sec;
tmval.tm_min = date_time->dt_min;
tmval.tm_hour = date_time->dt_hour;
tmval.tm_mday = date_time->dt_day;
tmval.tm_mon = date_time->dt_month - 1;
if (date_time->dt_year < 1000) {
// workaround when century is not given in year
tmval.tm_year = date_time->dt_year + 2000 - 1900;
}
else {
tmval.tm_year = date_time->dt_year - 1900;
}
timeval = mkgmtime(&tmval);
if (date_time->dt_zone >= 0) {
zone_hour = date_time->dt_zone / 100;
zone_min = date_time->dt_zone % 100;
}
else {
zone_hour = -((- date_time->dt_zone) / 100);
zone_min = -((- date_time->dt_zone) % 100);
}
timeval -= zone_hour * 3600 + zone_min * 60;
return timeval;
}
struct mailimf_date_time * mailcore::dateFromTimestamp(time_t timeval)
{
struct tm gmt;
struct tm lt;
int off;
struct mailimf_date_time * date_time;
int sign;
int hour;
int min;
gmtime_r(&timeval, &gmt);
localtime_r(&timeval, <);
off = (int) ((mkgmtime(<) - mkgmtime(&gmt)) / 60);
if (off < 0) {
sign = -1;
}
else {
sign = 1;
}
off = off * sign;
min = off % 60;
hour = off / 60;
off = hour * 100 + min;
off = off * sign;
date_time = mailimf_date_time_new(lt.tm_mday, lt.tm_mon + 1,
lt.tm_year + 1900,
lt.tm_hour, lt.tm_min, lt.tm_sec,
off);
return date_time;
}
struct mailimap_date_time * mailcore::imapDateFromTimestamp(time_t timeval)
{
struct tm gmt;
struct tm lt;
int off;
struct mailimap_date_time * date_time;
int sign;
int hour;
int min;
gmtime_r(&timeval, &gmt);
localtime_r(&timeval, <);
off = (int) ((mkgmtime(<) - mkgmtime(&gmt)) / 60);
if (off < 0) {
sign = -1;
}
else {
sign = 1;
}
off = off * sign;
min = off % 60;
hour = off / 60;
off = hour * 100 + min;
off = off * sign;
date_time = mailimap_date_time_new(lt.tm_mday, lt.tm_mon + 1,
lt.tm_year + 1900,
lt.tm_hour, lt.tm_min, lt.tm_sec,
off);
return date_time;
}
time_t mailcore::timestampFromIMAPDate(struct mailimap_date_time * date_time)
{
struct tm tmval;
time_t timeval;
int zone_min;
int zone_hour;
tmval.tm_sec = date_time->dt_sec;
tmval.tm_min = date_time->dt_min;
tmval.tm_hour = date_time->dt_hour;
tmval.tm_mday = date_time->dt_day;
tmval.tm_mon = date_time->dt_month - 1;
if (date_time->dt_year < 1000) {
// workaround when century is not given in year
tmval.tm_year = date_time->dt_year + 2000 - 1900;
}
else {
tmval.tm_year = date_time->dt_year - 1900;
}
timeval = mkgmtime(&tmval);
if (date_time->dt_zone >= 0) {
zone_hour = date_time->dt_zone / 100;
zone_min = date_time->dt_zone % 100;
}
else {
zone_hour = -((- date_time->dt_zone) / 100);
zone_min = -((- date_time->dt_zone) % 100);
}
timeval -= zone_hour * 3600 + zone_min * 60;
return timeval;
}
#define INVALID_TIMESTAMP (-1)
static int tmcomp(struct tm * atmp, struct tm * btmp)
{
int result;
if ((result = (atmp->tm_year - btmp->tm_year)) == 0 &&
(result = (atmp->tm_mon - btmp->tm_mon)) == 0 &&
(result = (atmp->tm_mday - btmp->tm_mday)) == 0 &&
(result = (atmp->tm_hour - btmp->tm_hour)) == 0 &&
(result = (atmp->tm_min - btmp->tm_min)) == 0)
result = atmp->tm_sec - btmp->tm_sec;
return result;
}
time_t mailcore::mkgmtime(struct tm * tmp)
{
int dir;
int bits;
int saved_seconds;
time_t t;
struct tm yourtm, mytm;
yourtm = *tmp;
saved_seconds = yourtm.tm_sec;
yourtm.tm_sec = 0;
/*
** Calculate the number of magnitude bits in a time_t
** (this works regardless of whether time_t is
** signed or unsigned, though lint complains if unsigned).
*/
for (bits = 0, t = 1; t > 0; ++bits, t <<= 1)
;
/*
** If time_t is signed, then 0 is the median value,
** if time_t is unsigned, then 1 << bits is median.
*/
if(bits > 40) bits = 40;
t = (t < 0) ? 0 : ((time_t) 1 << bits);
for ( ; ; ) {
gmtime_r(&t, &mytm);
dir = tmcomp(&mytm, &yourtm);
if (dir != 0) {
if (bits-- < 0) {
return INVALID_TIMESTAMP;
}
if (bits < 0)
--t;
else if (dir > 0)
t -= (time_t) 1 << bits;
else t += (time_t) 1 << bits;
continue;
}
break;
}
t += saved_seconds;
return t;
}
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