internal static string GetLongPathName(string path)
{
string result;
using (StringBuffer stringBuffer = new StringBuffer((uint)path.Length))
{
uint longPathNameW;
while ((longPathNameW = Win32Native.GetLongPathNameW(path, stringBuffer.GetHandle(), stringBuffer.CharCapacity)) > stringBuffer.CharCapacity)
{
stringBuffer.EnsureCharCapacity(longPathNameW);
}
if (longPathNameW == 0U)
{
LongPathHelper.GetErrorAndThrow(path);
}
stringBuffer.Length = longPathNameW;
result = stringBuffer.ToString();
}
return(result);
}
internal unsafe static string Normalize(string path, uint maxPathLength, bool checkInvalidCharacters, bool expandShortPaths)
{
StringBuffer stringBuffer;
if ((stringBuffer = LongPathHelper.t_fullPathBuffer) == null)
{
stringBuffer = (LongPathHelper.t_fullPathBuffer = new StringBuffer(260U));
}
StringBuffer stringBuffer2 = stringBuffer;
string result;
try
{
LongPathHelper.GetFullPathName(path, stringBuffer2);
stringBuffer2.TrimEnd(LongPathHelper.s_trimEndChars);
if (stringBuffer2.Length >= maxPathLength)
{
throw new PathTooLongException();
}
bool flag = false;
bool flag2 = false;
bool flag3 = stringBuffer2.Length > 1U && stringBuffer2[0U] == '\\' && stringBuffer2[1U] == '\\';
bool flag4 = PathInternal.IsDevice(stringBuffer2);
bool flag5 = flag3 && !flag4;
uint num = flag3 ? 2U : 0U;
uint num2 = flag3 ? 1U : 0U;
char *charPointer = stringBuffer2.CharPointer;
uint num3;
while (num < stringBuffer2.Length)
{
char c = charPointer[(ulong)num * 2UL / 2UL];
if (c < '?' || c == '\\' || c == '|' || c == '~')
{
if (c <= '>')
{
if (c != '"' && c != '<' && c != '>')
{
goto IL_155;
}
}
else if (c != '\\')
{
if (c != '|')
{
if (c != '~')
{
goto IL_155;
}
flag2 = true;
goto IL_16E;
}
}
else
{
num3 = num - num2 - 1U;
if (num3 > (uint)PathInternal.MaxComponentLength)
{
throw new PathTooLongException();
}
num2 = num;
if (flag2)
{
if (num3 <= 12U)
{
flag = true;
}
flag2 = false;
}
if (!flag5)
{
goto IL_16E;
}
if (num == stringBuffer2.Length - 1U)
{
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegalUNC"));
}
flag5 = false;
goto IL_16E;
}
if (checkInvalidCharacters)
{
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPathChars"));
}
flag2 = false;
goto IL_16E;
IL_155:
if (checkInvalidCharacters && c < ' ')
{
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPathChars"));
}
}
IL_16E:
num += 1U;
}
if (flag5)
{
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegalUNC"));
}
num3 = stringBuffer2.Length - num2 - 1U;
if (num3 > (uint)PathInternal.MaxComponentLength)
{
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
}
if (flag2 && num3 <= 12U)
{
flag = true;
}
if (expandShortPaths && flag)
{
result = LongPathHelper.TryExpandShortFileName(stringBuffer2, path);
}
else if (stringBuffer2.Length == (uint)path.Length && stringBuffer2.StartsWith(path))
{
result = path;
}
else
{
result = stringBuffer2.ToString();
}
}
finally
{
stringBuffer2.Free();
}
return(result);
}