/// <summary>
/// Gets the collation rules for the specified locale.
/// </summary>
/// <param name="locale">The locale.</param>
/// <param name="collatorRuleOption">UColRuleOption to use. Default is UColRuleOption.UCOL_TAILORING_ONLY</param>
public static string GetCollationRules(Locale locale, UColRuleOption collatorRuleOption = UColRuleOption.UCOL_TAILORING_ONLY)
{
ErrorCode err;
using (RuleBasedCollator.SafeRuleBasedCollatorHandle coll = NativeMethods.ucol_open(locale.Id, out err))
{
if (coll.IsInvalid || err.IsFailure())
{
return(null);
}
const int len = 1000;
IntPtr buffer = Marshal.AllocCoTaskMem(len * 2);
try
{
int actualLen = NativeMethods.ucol_getRulesEx(coll, collatorRuleOption, buffer, len);
if (actualLen > len)
{
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem(actualLen * 2);
NativeMethods.ucol_getRulesEx(coll, collatorRuleOption, buffer, actualLen);
}
return(Marshal.PtrToStringUni(buffer, actualLen));
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
}
}
/// <summary>
/// Gets the collation rules for the specified locale.
/// </summary>
/// <param name="locale">The locale.</param>
/// <returns></returns>
public static string GetCollationRules(string locale)
{
string sortRules = null;
ErrorCode err;
RuleBasedCollator.SafeRuleBasedCollatorHandle coll = NativeMethods.ucol_open(locale, out err);
if (!coll.IsInvalid && err == ErrorCode.NoErrors)
{
const int len = 1000;
IntPtr buffer = Marshal.AllocCoTaskMem(len * 2);
try
{
int actualLen = NativeMethods.ucol_getRulesEx(coll, UColRuleOption.UCOL_TAILORING_ONLY, buffer, len);
if (actualLen > len)
{
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem(actualLen * 2);
NativeMethods.ucol_getRulesEx(coll, UColRuleOption.UCOL_TAILORING_ONLY, buffer, actualLen);
}
sortRules = Marshal.PtrToStringUni(buffer);
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
}
return(sortRules);
}
