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// CIMFUtil.h : Declaration of the CIMFUtil class
#ifndef __CIMFUTIL_H_
#define __CIMFUTIL_H_
class CIMFUtil{
public: /************************************************************************************************
Member: CIMFUtil::SystemTimeToIMFDate, protected Synopsis: Converts a SYSTEMTIME to a string conforming to the IMF format (RFC 822). Used by the AddReceivedHeader function. Arguments: [in] pst - SYSTEMTIME to be analyzed. [out] lpszIMFDate - string that will receive the date in the IMF-required format. Notes: 1. Adapted from the original POP3 code by Virtual Motion (general.cpp). 2. Result stays ANSI (single byte). The IMF date is a 7-bit string for header. History: 03/08/2001 - created, Luciano Passuello (lucianop). ************************************************************************************************/ static void SystemTimeToIMFDate(SYSTEMTIME* pst, LPSTR lpszIMFDate) { static const LPCSTR rgszMonthsOfTheYear[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL };
static const LPCSTR rgszDaysOfTheWeek[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL };
TIME_ZONE_INFORMATION tzi; long ltzBias = 0; DWORD dwTimeZoneId = GetTimeZoneInformation (&tzi); switch (dwTimeZoneId) { case TIME_ZONE_ID_DAYLIGHT: ltzBias = tzi.Bias + tzi.DaylightBias; break; case TIME_ZONE_ID_STANDARD: case TIME_ZONE_ID_UNKNOWN: default: ltzBias = tzi.Bias + tzi.StandardBias; break; } long ltzHour = ltzBias / 60; long ltzMinute = ltzBias % 60; char cDiff = (ltzHour < 0) ? '+' : '-'; assert((pst->wMonth - 1) >= 0); // puts everything together
sprintf(lpszIMFDate, "%3s, %d %3s %4d %02d:%02d:%02d %c%02d%02d", // "ddd, dd mmm yyyy hh:mm:ss +/- hhmm\0"
rgszDaysOfTheWeek[pst->wDayOfWeek], // "ddd"
pst->wDay, // "dd"
rgszMonthsOfTheYear[pst->wMonth - 1], // "mmm"
pst->wYear, // "yyyy"
pst->wHour, // "hh"
pst->wMinute, // "mm"
pst->wSecond, // "ss"
cDiff, // "+" / "-"
abs(ltzHour), // "hh"
abs(ltzMinute)); // "mm"
}};
#endif //__CIMFUTIL_H_
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