/// <summary>
/// Creates a new instance relative to the given parent
/// </summary>
/// <param name="parent">The parent storage</param>
/// <param name="streamName">Path to stream under parent storage</param>
/// <param name="compressionOption">CompressionOption</param>
/// <param name="encryptionOption">EncryptionOption</param>
internal StreamInfo(StorageInfo parent, string streamName, CompressionOption compressionOption,
EncryptionOption encryptionOption)
{
// Parameter validation
CU.CheckAgainstNull(parent, "parent");
CU.CheckStringAgainstNullAndEmpty(streamName, "streamName");
// Parse path relative to given parent.
BuildStreamInfoRelativeToStorage(parent,
streamName);
_compressionOption = compressionOption;
_encryptionOption = encryptionOption;
_streamReference = new CompoundFileStreamReference(this.parentStorage.FullNameInternal, this.core.streamName);
}
/// <summary>
/// Deserialize from the given stream
/// </summary>
/// <param name="reader">the BinaryReader to deserialize from with the seek pointer at the beginning of the container reference</param>
/// <param name="bytesRead">bytes consumed from the stream</param>
/// <remarks>
/// Side effect of change the stream pointer
/// </remarks>
/// <exception cref="FileFormatException">Throws a FileFormatException if any formatting errors are encountered</exception>
internal static CompoundFileReference Load(BinaryReader reader, out int bytesRead)
{
ContainerUtilities.CheckAgainstNull(reader, "reader");
bytesRead = 0; // running count of how much we've read - sanity check
// create the TypeMap
// reconstitute ourselves from the given BinaryReader
// in this version, the next Int32 is the number of entries
Int32 entryCount = reader.ReadInt32();
bytesRead += ContainerUtilities.Int32Size;
// EntryCount of zero indicates the root storage.
if (entryCount < 0)
{
throw new FileFormatException(
SR.Get(SRID.CFRCorrupt));
}
// need a temp collection because we don't know what we're dealing with until a non-storage component
// type is encountered
StringCollection storageList = null;
String streamName = null;
// loop through the entries - accumulating strings until we know what kind of object
// we ultimately need
int byteLength; // reusable
while (entryCount > 0)
{
// first Int32 tells us what kind of component this entry represents
RefComponentType refType = (RefComponentType)reader.ReadInt32();
bytesRead += ContainerUtilities.Int32Size;
switch (refType)
{
case RefComponentType.Storage:
{
if (streamName != null)
{
throw new FileFormatException(
SR.Get(SRID.CFRCorruptStgFollowStm));
}
if (storageList == null)
{
storageList = new StringCollection();
}
String str = ContainerUtilities.ReadByteLengthPrefixedDWordPaddedUnicodeString(reader, out byteLength);
bytesRead += byteLength;
storageList.Add(str);
} break;
case RefComponentType.Stream:
{
if (streamName != null)
{
throw new FileFormatException(
SR.Get(SRID.CFRCorruptMultiStream));
}
streamName = ContainerUtilities.ReadByteLengthPrefixedDWordPaddedUnicodeString(reader, out byteLength);
bytesRead += byteLength;
} break;
// we don't handle these types yet
default:
throw new FileFormatException(
SR.Get(SRID.UnknownReferenceComponentType));
}
--entryCount;
}
CompoundFileReference newRef = null;
// stream or storage?
if (streamName == null)
{
newRef = new CompoundFileStorageReference(
ContainerUtilities.ConvertStringArrayPathToBackSlashPath(storageList));
}
else
{
newRef = new CompoundFileStreamReference(
ContainerUtilities.ConvertStringArrayPathToBackSlashPath(storageList, streamName));
}
return(newRef);
}