private static Result ParseWindowsPath(out U8Span newPath, Span <byte> buffer, out long windowsPathLength,
out bool isUncNormalized, U8Span path, bool hasMountName)
{
UnsafeHelpers.SkipParamInit(out windowsPathLength, out isUncNormalized);
newPath = default;
U8Span currentPath = path;
if (!Unsafe.IsNullRef(ref isUncNormalized))
{
isUncNormalized = true;
}
bool skippedMount = false;
int prefixLength = 0;
if (hasMountName)
{
if (path.GetOrNull(0) == DirectorySeparator && path.GetOrNull(1) == AltDirectorySeparator &&
path.GetOrNull(1) == AltDirectorySeparator)
{
currentPath = currentPath.Slice(1);
skippedMount = true;
}
else
{
int separatorCount = 0;
while (IsSeparator(currentPath.GetOrNull(separatorCount)))
{
separatorCount++;
}
if (separatorCount != 0)
{
if (separatorCount == 1 || WindowsPath.IsWindowsDrive(currentPath.Slice(separatorCount)))
{
currentPath = currentPath.Slice(separatorCount);
skippedMount = true;
}
else
{
if (separatorCount > 2 && !Unsafe.IsNullRef(ref isUncNormalized))
{
isUncNormalized = false;
return(Result.Success);
}
currentPath = currentPath.Slice(separatorCount - 2);
prefixLength = 1;
}
}
}
}
else if (path.GetOrNull(0) == DirectorySeparator && !WindowsPath.IsUnc(path))
{
currentPath = currentPath.Slice(1);
skippedMount = true;
}
U8Span trimmedPath = path;
if (WindowsPath.IsWindowsDrive(currentPath))
{
int i;
for (i = 2; currentPath.GetOrNull(i) != NullTerminator; i++)
{
if (currentPath[i] == DirectorySeparator || currentPath[i] == AltDirectorySeparator)
{
trimmedPath = currentPath.Slice(i);
break;
}
}
if (trimmedPath.Value == path.Value)
{
trimmedPath = currentPath.Slice(i);
}
ref byte pathStart = ref MemoryMarshal.GetReference(path.Value);
ref byte trimmedPathStart = ref MemoryMarshal.GetReference(trimmedPath.Value);