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/* --------------------------------------------------------------------------
timeconv.cpp Functions to perform various time conversion operations. Copyright (C) 1994, Microsoft Corporation. All rights reserved.
Author: Lindsay Harris - lindsayh
-------------------------------------------------------------------------- */
#include "smtpinc.h"
#include <time.h>
#include <string.h>
#include <dbgtrace.h>
#include "timeconv.h"
/*
* A handcrafted time zone string to GMT offsets table. This is not * a very good way to handle this. */
static struct{ int iTZOffset; // Arithmetic offset from GMT, in seconds.
char rgchTZName[ 4 ]; // String representation of time zone.
} _TZ_NAME[] ={ { 0, { 'G', 'M', 'T', '\0' } }, { 0, { 'U', 'T', 'C', '\0' } }, { 0, { 'U', 'T', '\0', '\0' } }, { -14400, { 'E', 'D', 'T', '\0' } }, { -18000, { 'E', 'S', 'T', '\0' } }, { -18000, { 'C', 'D', 'T', '\0' } }, { -21600, { 'C', 'S', 'T', '\0' } }, { -21600, { 'M', 'D', 'T', '\0' } }, { -25200, { 'M', 'S', 'T', '\0' } }, { -25200, { 'P', 'D', 'T', '\0' } }, { -28800, { 'P', 'S', 'T', '\0' } }, { 43200, { 'N', 'Z', 'S', '\0' } }, // NZ standard time.
{ 46800, { 'N', 'Z', 'D', '\0' } },};
#define NUM_TZ (sizeof( _TZ_NAME ) / sizeof( _TZ_NAME[ 0 ] ))
// The date Jan 1, 1970 00:00:00 in type FILETIME
#define ft1970high 27111902
#define ft1970low 3577643008
static FILETIME ft1970 = {ft1970low, ft1970high};
// The number of FILETIME units (100's of nanoseconds) in a time_t unit (seconds)
#define dFiletimePerDTime_t 10000000
/*
* English language month table. */
static char *rgchMonth[ 12 ] ={ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",};
/* -----------------------------------------------------------------------
GetSysAndFileTimeAsString --s tring should be atleast 64 bytes
----------------------------------------------------------------------- */
void GetSysAndFileTimeAsString( char *achReturn ){
SYSTEMTIME stUTC; // The current time in UTC/GMT
GetSystemTime( &stUTC );
FILETIME ft;
// Convert from SYSTEMTIME to FILETIME
SystemTimeToFileTime(&stUTC, &ft);
/*
* No major trickery here. We have all the data, so simply * format it according to the rules on how to do this. */
wsprintf( achReturn, "%02d %s %04d %02d:%02d:%02d.%04d (UTC) FILETIME=[%08X:%08X]", stUTC.wDay, rgchMonth[ stUTC.wMonth - 1 ], stUTC.wYear, stUTC.wHour, stUTC.wMinute, stUTC.wSecond, stUTC.wMilliseconds, ft.dwLowDateTime, ft.dwHighDateTime);}
/* -----------------------------------------------------------------------
GetArpaDate Returns a pointer to static memory containing the current date in Internet/ARPA standard format.
Author Lindsay Harris - lindasyh
History 13:49 on Wed 20 Apr 1994 -by- Lindsay Harris [lindsayh] First version. Imported to Tigris. Added passed-in buffer, changed year to 4-digit format
----------------------------------------------------------------------- */
char *GetArpaDate( char achReturn[ cMaxArpaDate ] ){
char chSign; // Sign to print.
DWORD dwResult;
int iBias; // Offset relative to GMT.
TIME_ZONE_INFORMATION tzi; // Local time zone data.
SYSTEMTIME stUTC; // The current time in UTC/GMT
dwResult = GetTimeZoneInformation( &tzi ); GetLocalTime( &stUTC );
// Calculate the time zone offset.
iBias = tzi.Bias; if( dwResult == TIME_ZONE_ID_DAYLIGHT ) iBias += tzi.DaylightBias; /*
* We always want to print the sign for the time zone offset, so * we decide what it is now and remember that when converting. * The convention is that west of the 0 degree meridian has a * negative offset - i.e. add the offset to GMT to get local time. */
if( iBias > 0 ) { chSign = '-'; // Yes, I do mean negative.
} else { iBias = -iBias; chSign = '+'; }
/*
* No major trickery here. We have all the data, so simply * format it according to the rules on how to do this. */
_snprintf( achReturn, cMaxArpaDate , "%d %s %04d %02d:%02d:%02d %c%02d%02d", stUTC.wDay, rgchMonth[ stUTC.wMonth - 1 ], stUTC.wYear, stUTC.wHour, stUTC.wMinute, stUTC.wSecond, chSign, (iBias / 60) % 100, iBias % 60 );
return achReturn;}
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