/*=================================GetAdvanceHijriDate==========================
**Action: Gets the AddHijriDate value from the registry.
**Returns:
**Arguments: None.
**Exceptions:
**Note:
** The HijriCalendar has a user-overidable calculation. That is, use can set a value from the control
** panel, so that the calculation of the Hijri Calendar can move ahead or backwards from -2 to +2 days.
**
** The valid string values in the registry are:
** "AddHijriDate-2" => Add -2 days to the current calculated Hijri date.
** "AddHijriDate" => Add -1 day to the current calculated Hijri date.
** "" => Add 0 day to the current calculated Hijri date.
** "AddHijriDate+1" => Add +1 days to the current calculated Hijri date.
** "AddHijriDate+2" => Add +2 days to the current calculated Hijri date.
**============================================================================*/
private static int GetAdvanceHijriDate()
{
int hijriAdvance = 0;
Microsoft.Win32.RegistryKey key = null;
try
{
// Open in read-only mode.
// Use InternalOpenSubKey so that we avoid the security check.
key = RegistryKey.GetBaseKey(RegistryKey.HKEY_CURRENT_USER).OpenSubKey(InternationalRegKey, false);
}
//If this fails for any reason, we'll just return 0.
catch (ObjectDisposedException) { return(0); }
catch (ArgumentException) { return(0); }
if (key != null)
{
try
{
Object value = key.InternalGetValue(HijriAdvanceRegKeyEntry, null, false, false);
if (value == null)
{
return(0);
}
String str = value.ToString();
if (String.Compare(str, 0, HijriAdvanceRegKeyEntry, 0, HijriAdvanceRegKeyEntry.Length, StringComparison.OrdinalIgnoreCase) == 0)
{
if (str.Length == HijriAdvanceRegKeyEntry.Length)
{
hijriAdvance = -1;
}
else
{
str = str.Substring(HijriAdvanceRegKeyEntry.Length);
try
{
int advance = Int32.Parse(str.ToString(), CultureInfo.InvariantCulture);
if ((advance >= MinAdvancedHijri) && (advance <= MaxAdvancedHijri))
{
hijriAdvance = advance;
}
}
// If we got garbage from registry just ignore it.
// hijriAdvance = 0 because of declaraction assignment up above.
catch (ArgumentException) { }
catch (FormatException) { }
catch (OverflowException) { }
}
}
}
finally
{
key.Close();
}
}
return(hijriAdvance);
}
// We know about 4 built-in eras, however users may add additional era(s) from the
// registry, by adding values to HKLM\SYSTEM\CurrentControlSet\Control\Nls\Calendars\Japanese\Eras
//
// Registry values look like:
// yyyy.mm.dd=era_abbrev_english_englishabbrev
//
// Where yyyy.mm.dd is the registry value name, and also the date of the era start.
// yyyy, mm, and dd are the year, month & day the era begins (4, 2 & 2 digits long)
// era is the Japanese Era name
// abbrev is the Abbreviated Japanese Era Name
// english is the English name for the Era (unused)
// englishabbrev is the Abbreviated English name for the era.
// . is a delimiter, but the value of . doesn't matter.
// '_' marks the space between the japanese era name, japanese abbreviated era name
// english name, and abbreviated english names.
private static EraInfo[] GetJapaneseEras()
{
// Look in the registry key and see if we can find any ranges
int iFoundEras = 0;
EraInfo[] registryEraRanges = null;
try
{
// Need to access registry
RegistryKey key = RegistryKey.GetBaseKey(RegistryKey.HKEY_LOCAL_MACHINE).OpenSubKey(c_japaneseErasHive, false);
// Abort if we didn't find anything
if (key == null)
{
return(null);
}
// Look up the values in our reg key
String[] valueNames = key.GetValueNames();
if (valueNames != null && valueNames.Length > 0)
{
registryEraRanges = new EraInfo[valueNames.Length];
// Loop through the registry and read in all the values
for (int i = 0; i < valueNames.Length; i++)
{
// See if the era is a valid date
EraInfo era = GetEraFromValue(valueNames[i], key.GetValue(valueNames[i]).ToString());
// continue if not valid
if (era == null)
{
continue;
}
// Remember we found one.
registryEraRanges[iFoundEras] = era;
iFoundEras++;
}
}
}
catch (System.Security.SecurityException)
{
// If we weren't allowed to read, then just ignore the error
return(null);
}
catch (System.IO.IOException)
{
// If key is being deleted just ignore the error
return(null);
}
catch (System.UnauthorizedAccessException)
{
// Registry access rights permissions, just ignore the error
return(null);
}
//
// If we didn't have valid eras, then fail
// should have at least 4 eras
//
if (iFoundEras < 4)
{
return(null);
}
//
// Now we have eras, clean them up.
//
// Clean up array length
Array.Resize(ref registryEraRanges, iFoundEras);
// Sort them
Array.Sort(registryEraRanges, CompareEraRanges);
// Clean up era information
for (int i = 0; i < registryEraRanges.Length; i++)
{
// eras count backwards from length to 1 (and are 1 based indexes into string arrays)
registryEraRanges[i].era = registryEraRanges.Length - i;
// update max era year
if (i == 0)
{
// First range is 'til the end of the calendar
registryEraRanges[0].maxEraYear = GregorianCalendar.MaxYear - registryEraRanges[0].yearOffset;
}
else
{
// Rest are until the next era (remember most recent era is first in array)
registryEraRanges[i].maxEraYear = registryEraRanges[i - 1].yearOffset + 1 - registryEraRanges[i].yearOffset;
}
}
// Return our ranges
return(registryEraRanges);
}
private static EraInfo[] GetErasFromRegistry()
{
int index = 0;
EraInfo[] array = null;
try
{
PermissionSet set = new PermissionSet(PermissionState.None);
set.AddPermission(new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Nls\Calendars\Japanese\Eras"));
set.Assert();
RegistryKey key = RegistryKey.GetBaseKey(RegistryKey.HKEY_LOCAL_MACHINE).OpenSubKey(@"System\CurrentControlSet\Control\Nls\Calendars\Japanese\Eras", false);
if (key == null)
{
return(null);
}
string[] valueNames = key.GetValueNames();
if ((valueNames != null) && (valueNames.Length > 0))
{
array = new EraInfo[valueNames.Length];
for (int j = 0; j < valueNames.Length; j++)
{
EraInfo eraFromValue = GetEraFromValue(valueNames[j], key.GetValue(valueNames[j]).ToString());
if (eraFromValue != null)
{
array[index] = eraFromValue;
index++;
}
}
}
}
catch (SecurityException)
{
return(null);
}
catch (IOException)
{
return(null);
}
catch (UnauthorizedAccessException)
{
return(null);
}
if (index < 4)
{
return(null);
}
Array.Resize <EraInfo>(ref array, index);
Array.Sort <EraInfo>(array, new Comparison <EraInfo>(JapaneseCalendar.CompareEraRanges));
for (int i = 0; i < array.Length; i++)
{
array[i].era = array.Length - i;
if (i == 0)
{
array[0].maxEraYear = 0x270f - array[0].yearOffset;
}
else
{
array[i].maxEraYear = (array[i - 1].yearOffset + 1) - array[i].yearOffset;
}
}
return(array);
}
private static EraInfo[] GetErasFromRegistry()
{
int newSize = 0;
EraInfo[] array = (EraInfo[])null;
try
{
PermissionSet permissionSet = new PermissionSet(PermissionState.None);
RegistryPermission registryPermission = new RegistryPermission(RegistryPermissionAccess.Read, "HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\Nls\\Calendars\\Japanese\\Eras");
permissionSet.AddPermission((IPermission)registryPermission);
permissionSet.Assert();
RegistryKey registryKey = RegistryKey.GetBaseKey(RegistryKey.HKEY_LOCAL_MACHINE).OpenSubKey("System\\CurrentControlSet\\Control\\Nls\\Calendars\\Japanese\\Eras", false);
if (registryKey == null)
{
return((EraInfo[])null);
}
string[] valueNames = registryKey.GetValueNames();
if (valueNames != null)
{
if (valueNames.Length != 0)
{
array = new EraInfo[valueNames.Length];
for (int index = 0; index < valueNames.Length; ++index)
{
EraInfo eraFromValue = JapaneseCalendar.GetEraFromValue(valueNames[index], registryKey.GetValue(valueNames[index]).ToString());
if (eraFromValue != null)
{
array[newSize] = eraFromValue;
++newSize;
}
}
}
}
}
catch (SecurityException ex)
{
return((EraInfo[])null);
}
catch (IOException ex)
{
return((EraInfo[])null);
}
catch (UnauthorizedAccessException ex)
{
return((EraInfo[])null);
}
if (newSize < 4)
{
return((EraInfo[])null);
}
Array.Resize <EraInfo>(ref array, newSize);
Array.Sort <EraInfo>(array, new Comparison <EraInfo>(JapaneseCalendar.CompareEraRanges));
for (int index = 0; index < array.Length; ++index)
{
array[index].era = array.Length - index;
if (index == 0)
{
array[0].maxEraYear = 9999 - array[0].yearOffset;
}
else
{
array[index].maxEraYear = array[index - 1].yearOffset + 1 - array[index].yearOffset;
}
}
return(array);
}