/// <summary>
/// Writes the property Set To an output stream.
/// </summary>
/// <param name="out1">the output stream To Write the section To</param>
public virtual void Write(Stream out1)
{
/* Write the number of sections in this property Set stream. */
int nrSections = sections.Count;
int length = 0;
/* Write the property Set's header. */
length += TypeWriter.WriteToStream(out1, (short)ByteOrder);
length += TypeWriter.WriteToStream(out1, (short)Format);
length += TypeWriter.WriteToStream(out1, OSVersion);
length += TypeWriter.WriteToStream(out1, ClassID);
length += TypeWriter.WriteToStream(out1, nrSections);
int offset = OFFSet_HEADER;
/* Write the section list, i.e. the references To the sections. Each
* entry in the section list consist of the section's class ID and the
* section's offset relative To the beginning of the stream. */
offset += nrSections * (ClassID.Length + LittleEndianConsts.INT_SIZE);
int sectionsBegin = offset;
for (IEnumerator i = sections.GetEnumerator(); i.MoveNext();)
{
MutableSection s = (MutableSection)i.Current;
ClassID formatID = s.FormatID;
if (formatID == null)
{
throw new NoFormatIDException();
}
length += TypeWriter.WriteToStream(out1, s.FormatID);
length += TypeWriter.WriteUIntToStream(out1, (uint)offset);
offset += s.Size;
}
/* Write the sections themselves. */
offset = sectionsBegin;
for (IEnumerator i = sections.GetEnumerator(); i.MoveNext();)
{
MutableSection s = (MutableSection)i.Current;
offset += s.Write(out1);
}
}
/// <summary>
/// Writes a variant value To an output stream. This method ensures that
/// always a multiple of 4 bytes is written.
/// If the codepage is UTF-16, which is encouraged, strings
/// <strong>must</strong> always be written as {@link Variant#VT_LPWSTR}
/// strings, not as {@link Variant#VT_LPSTR} strings. This method ensure this
/// by Converting strings appropriately, if needed.
/// </summary>
/// <param name="out1">The stream To Write the value To.</param>
/// <param name="type">The variant's type.</param>
/// <param name="value">The variant's value.</param>
/// <param name="codepage">The codepage To use To Write non-wide strings</param>
/// <returns>The number of entities that have been written. In many cases an
/// "entity" is a byte but this is not always the case.</returns>
public static int Write(Stream out1, long type,
Object value, int codepage)
{
int length = 0;
switch ((int)type)
{
case Variant.VT_BOOL:
{
int trueOrFalse;
if ((bool)value)
{
trueOrFalse = 1;
}
else
{
trueOrFalse = 0;
}
length = TypeWriter.WriteUIntToStream(out1, (uint)trueOrFalse);
break;
}
case Variant.VT_LPSTR:
{
if (codepage == 0)
{
throw new ArgumentOutOfRangeException("codepage");
}
byte[] bytes =
(codepage == -1 ?
Encoding.UTF8.GetBytes((string)value) :
Encoding.GetEncoding(codepage).GetBytes((string)value));
length = TypeWriter.WriteUIntToStream(out1, (uint)bytes.Length + 1);
byte[] b = new byte[bytes.Length + 1];
Array.Copy(bytes, 0, b, 0, bytes.Length);
b[b.Length - 1] = 0x00;
out1.Write(b, 0, b.Length);
length += b.Length;
break;
}
case Variant.VT_LPWSTR:
{
int nrOfChars = ((String)value).Length + 1;
length += TypeWriter.WriteUIntToStream(out1, (uint)nrOfChars);
char[] s = Util.Pad4((String)value);
for (int i = 0; i < s.Length; i++)
{
int high = ((s[i] & 0x0000ff00) >> 8);
int low = (s[i] & 0x000000ff);
byte highb = (byte)high;
byte lowb = (byte)low;
out1.WriteByte(lowb);
out1.WriteByte(highb);
length += 2;
}
out1.WriteByte(0x00);
out1.WriteByte(0x00);
length += 2;
break;
}
case Variant.VT_CF:
{
byte[] b = (byte[])value;
out1.Write(b, 0, b.Length);
length = b.Length;
break;
}
case Variant.VT_EMPTY:
{
TypeWriter.WriteUIntToStream(out1, Variant.VT_EMPTY);
length = LittleEndianConsts.INT_SIZE;
break;
}
case Variant.VT_I2:
{
short x;
try
{
x = Convert.ToInt16(value, CultureInfo.InvariantCulture);
}catch (OverflowException)
{
x = (short)((int)value);
}
TypeWriter.WriteToStream(out1, x);
length = LittleEndianConsts.SHORT_SIZE;
break;
}
case Variant.VT_I4:
{
if (!(value is int))
{
throw new Exception("Could not cast an object To "
+ "int" + ": "
+ value.GetType().Name + ", "
+ value.ToString());
}
length += TypeWriter.WriteToStream(out1, (int)value);
break;
}
case Variant.VT_I8:
{
TypeWriter.WriteToStream(out1, Convert.ToInt64(value, CultureInfo.CurrentCulture));
length = LittleEndianConsts.LONG_SIZE;
break;
}
case Variant.VT_R8:
{
length += TypeWriter.WriteToStream(out1,
(Double)value);
break;
}
case Variant.VT_FILETIME:
{
long filetime;
if (value != null)
{
filetime = Util.DateToFileTime((DateTime)value);
}
else
{
filetime = 0;
}
int high = (int)((filetime >> 32) & 0x00000000FFFFFFFFL);
int low = (int)(filetime & 0x00000000FFFFFFFFL);
length += TypeWriter.WriteUIntToStream
(out1, (uint)(0x0000000FFFFFFFFL & low));
length += TypeWriter.WriteUIntToStream
(out1, (uint)(0x0000000FFFFFFFFL & high));
break;
}
default:
{
/* The variant type is not supported yet. However, if the value
* is a byte array we can Write it nevertheless. */
if (value is byte[])
{
byte[] b = (byte[])value;
out1.Write(b, 0, b.Length);
length = b.Length;
WriteUnsupportedTypeMessage
(new WritingNotSupportedException(type, value));
}
else
{
throw new WritingNotSupportedException(type, value);
}
break;
}
}
return(length);
}
/// <summary>
/// Writes this section into an output stream.
/// Internally this is done by writing into three byte array output
/// streams: one for the properties, one for the property list and one for
/// the section as such. The two former are Appended To the latter when they
/// have received all their data.
/// </summary>
/// <param name="out1">The stream To Write into.</param>
/// <returns>The number of bytes written, i.e. the section's size.</returns>
public int Write(Stream out1)
{
/* Check whether we have alReady generated the bytes making out the
* section. */
if (!dirty && sectionBytes != null)
{
out1.Write(sectionBytes, 0, sectionBytes.Length);
return(sectionBytes.Length);
}
/* The properties are written To this stream. */
using (MemoryStream propertyStream =
new MemoryStream())
{
/* The property list is established here. After each property that has
* been written To "propertyStream", a property list entry is written To
* "propertyListStream". */
using (MemoryStream propertyListStream =
new MemoryStream())
{
/* Maintain the current position in the list. */
int position = 0;
/* Increase the position variable by the size of the property list so
* that it points behind the property list and To the beginning of the
* properties themselves. */
position += 2 * LittleEndianConsts.INT_SIZE +
PropertyCount * 2 * LittleEndianConsts.INT_SIZE;
/* Writing the section's dictionary it tricky. If there is a dictionary
* (property 0) the codepage property (property 1) must be Set, Too. */
int codepage = -1;
if (GetProperty(PropertyIDMap.PID_DICTIONARY) != null)
{
Object p1 = GetProperty(PropertyIDMap.PID_CODEPAGE);
if (p1 != null)
{
if (!(p1 is int))
{
throw new IllegalPropertySetDataException
("The codepage property (ID = 1) must be an " +
"Integer object.");
}
}
else
{
/* Warning: The codepage property is not Set although a
* dictionary is present. In order To cope with this problem we
* Add the codepage property and Set it To Unicode. */
SetProperty(PropertyIDMap.PID_CODEPAGE, Variant.VT_I2,
(int)Constants.CP_UNICODE);
}
codepage = Codepage;
}
/* Sort the property list by their property IDs: */
preprops.Sort(new PropertyComparer());
/* Write the properties and the property list into their respective
* streams: */
for (int i = 0; i < preprops.Count; i++)
{
MutableProperty p = (MutableProperty)preprops[i];
long id = p.ID;
/* Write the property list entry. */
TypeWriter.WriteUIntToStream(propertyListStream, (uint)p.ID);
TypeWriter.WriteUIntToStream(propertyListStream, (uint)position);
/* If the property ID is not equal 0 we Write the property and all
* is fine. However, if it Equals 0 we have To Write the section's
* dictionary which has an implicit type only and an explicit
* value. */
if (id != 0)
{
/* Write the property and update the position To the next
* property. */
position += p.Write(propertyStream, Codepage);
}
else
{
if (codepage == -1)
{
throw new IllegalPropertySetDataException
("Codepage (property 1) is undefined.");
}
position += WriteDictionary(propertyStream, dictionary,
codepage);
}
}
propertyStream.Flush();
propertyListStream.Flush();
/* Write the section: */
byte[] pb1 = propertyListStream.ToArray();
byte[] pb2 = propertyStream.ToArray();
/* Write the section's Length: */
TypeWriter.WriteToStream(out1, LittleEndianConsts.INT_SIZE * 2 +
pb1.Length + pb2.Length);
/* Write the section's number of properties: */
TypeWriter.WriteToStream(out1, PropertyCount);
/* Write the property list: */
out1.Write(pb1, 0, pb1.Length);
/* Write the properties: */
out1.Write(pb2, 0, pb2.Length);
int streamLength = LittleEndianConsts.INT_SIZE * 2 + pb1.Length + pb2.Length;
return(streamLength);
}
}
}