/*
** Author: Samuel R. Blackburn (http://www.codeproject.com/library/wfc.asp)
** Internet: wfc@pobox.com
**
** You can use it any way you like as long as you don't try to sell it.
**
** Any attempt to sell WFC in source code form must have the permission
** of the original author. You can produce commercial executables with
** WFC but you can't sell WFC.
**
** Copyright, 2000, Samuel R. Blackburn
**
** $Workfile: wfc_parse_iso_8601_string.cpp $
** $Revision: 7 $
** $Modtime: 1/24/00 6:11p $
** $Reuse Tracing Code: 1 $
*/
/****************************************************************************/
/** **/
/** Modified
2005 by Diodia Software (http://www.diodia.com/) **/
/**
**/
/****************************************************************************/
#include "stdafx.h"
#include "RssHelpers.h"
static BOOL __parse_ymdhms( LPCTSTR time_string,
int& year,
int& month,
int& day,
int& hours,
int& minutes,
int& seconds,
TCHAR& offset_character,
int& offset_hours,
int& offset_minutes )
{
// Here's a sample ISO8601 date string
//
// 1969-07-20T22:56:15-04:00
// Do a little idiot checking
if ( time_string == NULL )
return( FALSE );
// Start with some believable defaults
year = 0;
month = 1;
day = 1;
hours = 0;
minutes = 0;
seconds = 0;
offset_character = TEXT( 'Z' );
offset_hours = 0;
offset_minutes = 0;
// We were passed a pointer, don't trust it
try
{
if ( _tcslen( time_string ) < 4 )
{
// There ain't enough characters to even attempt to parse
return( FALSE );
}
// OK, let's start parsing
if ( _istdigit( time_string[ 0 ] ) == 0 )
{
// First character is not a digit
return( FALSE );
}
if ( _istdigit( time_string[ 1 ] ) == 0 )
{
// Second character is not a digit
return( FALSE );
}
if ( _istdigit( time_string[ 2 ] ) == 0 )
{
// Third character is not a digit"
return( FALSE );
}
if ( _istdigit( time_string[ 3 ] ) == 0 )
{
// Fourth character is not a digit
return( FALSE );
}
// If we get here, it means we've got 4 good digits
TCHAR temp_string[ 5 ];
temp_string[ 0 ] = time_string[ 0 ];
temp_string[ 1 ] = time_string[ 1 ];
temp_string[ 2 ] = time_string[ 2 ];
temp_string[ 3 ] = time_string[ 3 ];
temp_string[ 4 ] = 0x00;
year = _ttoi( temp_string );
DWORD index = 4;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// We're at the end of the string
return( TRUE );
}
if ( time_string[ index ] != TEXT( '-' ) )
{
// The separator between year and month is not -
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// We're at the end of the string
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of month field isn't a digit at all
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
// This test is safe because we could be sitting on a NULL
if ( _istdigit( time_string[ index ] ) == 0 )
{
// Second digit of month field isn't a digit at all
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
temp_string[ 2 ] = 0x00;
month = _ttoi( temp_string );
// Do a little idiot proofing
if ( month < 1 || month > 12 )
{
// Funky month
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
return( TRUE );
}
if ( time_string[ index ] != TEXT( '-' ) )
{
// The separator between month and day fields is not -
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of day field isn't a digit at all
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
// This test is safe because we could be sitting on a NULL
if ( _istdigit( time_string[ index ] ) == 0 )
{
// Second digit of month field isn't a digit at all
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
// We don't need to set temp_string[ 2 ] because we did that at line 158 above
day = _ttoi( temp_string );
// Do a very little bit of error checking
if ( day < 1 || day > 31 )
{
// Funky day
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( time_string[ index ] != TEXT( 'T' ) )
{
// Separator between date and time ain't T
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of hours field isn't a digit at all
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
// This test is safe because we could be sitting on a NULL
if ( _istdigit( time_string[ index ] ) == 0 )
{
// Second digit of month field isn't a digit at all
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
// We don't need to set temp_string[ 2 ] because we did that at line 158 above
hours = _ttoi( temp_string );
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( time_string[ index ] != TEXT( ':' ) )
{
// Separator between hours and minutes ain't :
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of time ain't no digit
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of time ain't no digit
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
minutes = _ttoi( temp_string );
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
return( TRUE );
}
if ( time_string[ index ] != TEXT( ':' ) )
{
// Separator between minutes and seconds ain't :
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 )
{
// Odd, but not illegal
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of seconds ain't no digit
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// Second digit of seconds ain't no digit
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
seconds = _ttoi( temp_string );
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] == 0x00 ||
time_string[ index ] == TEXT( 'Z' ) )
{
return( TRUE );
}
// OK, now is the time when parsing gets interesting
// The current index may be sitting on a partial second.
// Since CTime can't deal with partial seconds, we
// will just skip that part entirely.
if ( time_string[ index ] == TEXT( '.' ) )
{
index++;
BOOL exit_loop = FALSE;
while( exit_loop == FALSE )
{
if ( time_string[ index ] == 0x00 )
{
return( TRUE );
}
if ( _istdigit( time_string[ index ] ) == 0 )
{
exit_loop = TRUE;
}
else
{
index++;
}
}
}
// If we get here, we should be sitting on a Z, + or -
if ( time_string[ index ] == TEXT( 'Z' ) )
{
return( TRUE );
}
if ( time_string[ index ] != TEXT( '+' ) &&
time_string[ index ] != TEXT( '-' ) )
{
// Time zone designator ain't beginning with + or -
return( FALSE );
}
offset_character = time_string[ index ];
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// first digit of hours offset ain't a digit
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// second digit of hours offset ain't a digit
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
offset_hours = _ttoi( temp_string );
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( time_string[ index ] != TEXT( ':' ) )
{
// Separator between offset hours and minutes ain't a :
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// First digit of minutes offset ain't a digit
return( FALSE );
}
index++;
// index should be pointing here
// |
// v
// 1969-07-20T22:56:15-04:00
if ( _istdigit( time_string[ index ] ) == 0 )
{
// Second digit of minutes offset ain't a digit
return( FALSE );
}
temp_string[ 0 ] = time_string[ index - 1 ];
temp_string[ 1 ] = time_string[ index ];
offset_minutes = _ttoi( temp_string );
return( TRUE );
}
catch( ... )
{
return( FALSE );
}
}
BOOL wfc_parse_iso_8601_string( LPCTSTR time_string, FILETIME& the_time )
{
the_time.dwHighDateTime = 0;
the_time.dwLowDateTime = 0;
SYSTEMTIME system_time;
if ( wfc_parse_iso_8601_string( time_string, system_time ) == FALSE )
{
return( FALSE );
}
SystemTimeToFileTime(&system_time, &the_time);
return( TRUE );
}
BOOL wfc_parse_iso_8601_string( LPCTSTR time_string, COleDateTime& the_time )
{
the_time = COleDateTime( static_cast< time_t >( 0 ) );
// Do a little idiot checking
if ( time_string == NULL )
{
// time_string is NULL!
return( FALSE );
}
int year = 0;
int month = 0;
int day = 0;
int hours = 0;
int minutes = 0;
int seconds = 0;
TCHAR offset_character = 0;
int offset_hours = 0;
int offset_minutes = 0;
if ( __parse_ymdhms( time_string, year, month, day, hours, minutes, seconds, offset_character, offset_hours, offset_minutes ) == FALSE )
{
// Can't parse string
return( FALSE );
}
the_time = COleDateTime( year, month, day, hours, minutes, seconds );
if ( offset_character != TEXT( 'Z' ) )
{
COleDateTimeSpan time_zone_offset( 0, offset_hours, offset_minutes, 0 );
if ( offset_character == TEXT( '-' ) )
{
the_time += time_zone_offset;
}
else if ( offset_character == TEXT( '+' ) )
{
the_time -= time_zone_offset;
}
}
return( TRUE );
}
BOOL wfc_parse_iso_8601_string( LPCTSTR time_string, SYSTEMTIME& the_time )
{
the_time.wYear = 0;
the_time.wMonth = 0;
the_time.wDay = 0;
the_time.wDayOfWeek = 0;
the_time.wHour = 0;
the_time.wMinute = 0;
the_time.wSecond = 0;
the_time.wMilliseconds = 0;
// Do a little idiot checking
if ( time_string == NULL )
{
// time_string is NULL!
return( FALSE );
}
int year = 0;
int month = 0;
int day = 0;
int hours = 0;
int minutes = 0;
int seconds = 0;
TCHAR offset_character = 0;
int offset_hours = 0;
int offset_minutes = 0;
if ( __parse_ymdhms( time_string, year, month, day, hours, minutes, seconds, offset_character, offset_hours, offset_minutes ) == FALSE )
{
// Can't parse string
return( FALSE );
}
CTime ole_time = CTime( year, month, day, hours, minutes, seconds );
if ( offset_character != TEXT( 'Z' ) )
{
CTimeSpan time_zone_offset( 0, offset_hours, offset_minutes, 0 );
if ( offset_character == TEXT( '-' ) )
{
ole_time += time_zone_offset;
}
else if ( offset_character == TEXT( '+' ) )
{
ole_time -= time_zone_offset;
}
}
ole_time.GetAsSystemTime(the_time);
return( TRUE );
}
BOOL wfc_parse_iso_8601_string( LPCTSTR time_string, CTime& the_time )
{
the_time = CTime( static_cast< time_t >( 0 ) );
// Do a little idiot checking
if ( time_string == NULL )
{
// time_string is NULL!
return( FALSE );
}
int year = 0;
int month = 0;
int day = 0;
int hours = 0;
int minutes = 0;
int seconds = 0;
TCHAR offset_character = 0;
int offset_hours = 0;
int offset_minutes = 0;
if ( __parse_ymdhms( time_string, year, month, day, hours, minutes, seconds, offset_character, offset_hours, offset_minutes ) == FALSE )
{
// Can't parse string
return( FALSE );
}
the_time = CTime( year, month, day, hours, minutes, seconds );
if ( offset_character != TEXT( 'Z' ) )
{
CTimeSpan time_zone_offset( 0, offset_hours, offset_minutes, 0 );
if ( offset_character == TEXT( '-' ) )
{
the_time += time_zone_offset;
}
else if ( offset_character == TEXT( '+' ) )
{
the_time -= time_zone_offset;
}
}
return( TRUE );
}
Source Files
Commands.cpp
Context.cpp
CreatePath.cpp
DateParser.cpp
DlgEditFeedC.cpp
DlgManageFeedsC.cpp
Hook.cpp
Iso8601.cpp
MsXmlMisc.cpp
MsXmlSelect.cpp
RegistryNotify.cpp
RegistryUtil.cpp
RSS.cpp
RSS.def
RSS.idl
RssAction.cpp
RssDownloader.cpp
RssFeed.cpp
RssHelpers.cpp
RssInit.cpp
RssItem.cpp
RssMultiFeed.cpp
RssTimer.cpp
RssXml.cpp
StdAfx.cpp
Header Files
Commands.h
ContextC.h
DateParser.h
DlgEditFeedC.h
DlgManageFeedsC.h
Helper.h
HookC.h
RegistryNotify.h
RegistryNotifyC.h
Resource.h
RssDownloaderC.h
RssFeedC.h
RssHelpers.h
RssItemC.h
RssMultiFeedC.h
StdAfx.h
ThreadObject.h
XmlHelpers.h
Resource Files
about.htm
DiodiaLogoSmall.gif
logo.bmp
manifest.xml
read.bmp
RSS.rc
RSS.rgs
ToolBandLayout.xml
© 2002-2009 Diodia Software