public static Result ConvertToFspPath(out FspPath fspPath, ReadOnlySpan <byte> path)
{
UnsafeHelpers.SkipParamInit(out fspPath);
int length = StringUtils.Copy(SpanHelpers.AsByteSpan(ref fspPath), path, PathTool.EntryNameLengthMax + 1);
if (length >= PathTool.EntryNameLengthMax + 1)
{
return(ResultFs.TooLongPath.Log());
}
Result rc = PathFormatter.SkipMountName(out ReadOnlySpan <byte> pathWithoutMountName, out _,
new U8Span(path));
if (rc.IsFailure())
{
return(rc);
}
if (!WindowsPath12.IsWindowsPath(pathWithoutMountName, true))
{
Replace(SpanHelpers.AsByteSpan(ref fspPath).Slice(0, 0x300), AltDirectorySeparator, DirectorySeparator);
}
else if (fspPath.Str[0] == DirectorySeparator && fspPath.Str[1] == DirectorySeparator)
{
SpanHelpers.AsByteSpan(ref fspPath)[0] = AltDirectorySeparator;
SpanHelpers.AsByteSpan(ref fspPath)[1] = AltDirectorySeparator;
}
return(Result.Success);
}
private static Result ParseWindowsPathImpl(out ReadOnlySpan <byte> newPath, out int windowsPathLength,
Span <byte> normalizeBuffer, ReadOnlySpan <byte> path, bool hasMountName)
{
Assert.SdkRequiresNotNull(path);
UnsafeHelpers.SkipParamInit(out windowsPathLength);
newPath = default;
if (normalizeBuffer.Length != 0)
{
normalizeBuffer[0] = NullTerminator;
}
ReadOnlySpan <byte> currentPath = path;
if (hasMountName && path.At(0) == DirectorySeparator)
{
if (path.At(1) == AltDirectorySeparator && path.At(2) == AltDirectorySeparator)
{
if (normalizeBuffer.Length == 0)
{
return(ResultFs.NotNormalized.Log());
}
currentPath = path.Slice(1);
}
else if (path.Length != 0 && WindowsPath12.IsWindowsDrive(path.Slice(1)))
{
if (normalizeBuffer.Length == 0)
{
return(ResultFs.NotNormalized.Log());
}
currentPath = path.Slice(1);
}
}
if (WindowsPath12.IsWindowsDrive(currentPath))
{
int winPathLength;
for (winPathLength = 2; currentPath.At(winPathLength) != NullTerminator; winPathLength++)
{
if (currentPath[winPathLength] == DirectorySeparator ||
currentPath[winPathLength] == AltDirectorySeparator)
{
break;
}
}
if (normalizeBuffer.IsEmpty)
{
for (int i = 0; i < winPathLength; i++)
{
if (currentPath[i] == '\\')
{
return(ResultFs.NotNormalized.Log());
}
}
}
if (!normalizeBuffer.IsEmpty)
{
if (winPathLength >= normalizeBuffer.Length)
{
return(ResultFs.TooLongPath.Log());
}
currentPath.Slice(0, winPathLength).CopyTo(normalizeBuffer);
normalizeBuffer[winPathLength] = NullTerminator;
PathUtility12.Replace(normalizeBuffer.Slice(0, winPathLength), AltDirectorySeparator,
DirectorySeparator);
}
newPath = currentPath.Slice(winPathLength);
windowsPathLength = winPathLength;
return(Result.Success);
}
if (WindowsPath12.IsDosDevicePath(currentPath))
{
int dosPathLength = WindowsPath12.GetDosDevicePathPrefixLength();
if (WindowsPath12.IsWindowsDrive(currentPath.Slice(dosPathLength)))
{
dosPathLength += 2;
}
else
{
dosPathLength--;
}
if (!normalizeBuffer.IsEmpty)
{
if (dosPathLength >= normalizeBuffer.Length)
{
return(ResultFs.TooLongPath.Log());
}
currentPath.Slice(0, dosPathLength).CopyTo(normalizeBuffer);
normalizeBuffer[dosPathLength] = NullTerminator;
PathUtility12.Replace(normalizeBuffer.Slice(0, dosPathLength), DirectorySeparator,
AltDirectorySeparator);
}
newPath = currentPath.Slice(dosPathLength);
windowsPathLength = dosPathLength;
return(Result.Success);
}
if (WindowsPath12.IsUncPath(currentPath, false, true))
{
Result rc;
ReadOnlySpan <byte> finalPath = currentPath;
if (currentPath.At(2) == DirectorySeparator || currentPath.At(2) == AltDirectorySeparator)
{
return(ResultFs.InvalidPathFormat.Log());
}
int currentComponentOffset = 0;
int pos;
for (pos = 2; currentPath.At(pos) != NullTerminator; pos++)
{
if (currentPath.At(pos) == DirectorySeparator || currentPath.At(pos) == AltDirectorySeparator)
{
if (currentComponentOffset != 0)
{
rc = CheckSharedName(
currentPath.Slice(currentComponentOffset, pos - currentComponentOffset));
if (rc.IsFailure())
{
return(rc);
}
finalPath = currentPath.Slice(pos);
break;
}
if (currentPath.At(pos + 1) == DirectorySeparator || currentPath.At(pos + 1) == AltDirectorySeparator)
{
return(ResultFs.InvalidPathFormat.Log());
}
rc = CheckHostName(currentPath.Slice(2, pos - 2));
if (rc.IsFailure())
{
return(rc);
}
currentComponentOffset = pos + 1;
}
}
if (currentComponentOffset == pos)
{
return(ResultFs.InvalidPathFormat.Log());
}
if (currentComponentOffset != 0 && finalPath == currentPath)
{
rc = CheckSharedName(currentPath.Slice(currentComponentOffset, pos - currentComponentOffset));
if (rc.IsFailure())
{
return(rc);
}
finalPath = currentPath.Slice(pos);
}
ref byte currentPathStart = ref MemoryMarshal.GetReference(currentPath);
ref byte finalPathStart = ref MemoryMarshal.GetReference(finalPath);