/// <summary>
/// Creates this object and sets all its properties
/// </summary>
/// <param name="stream">The Compound File Storage CompObj <see cref="CFStream" /></param>
internal CompObjStream(CFStream stream)
{
using (var memoryStream = new MemoryStream(stream.GetData()))
using (var binaryReader = new BinaryReader(memoryStream))
{
// Reserved1 (4 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Version (4 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Reserved2 (20 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Skip the first 28 bytes, this is the CompObjHeader
binaryReader.ReadBytes(28);
// This MUST be a LengthPrefixedAnsiString structure that contains a display name of the linked
// object or embedded object.
AnsiUserType = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
// MarkerOrLength (4 bytes): If this is set to 0x00000000, the FormatOrAnsiString field MUST NOT
// be present. If this field is set to 0xFFFFFFFF or 0xFFFFFFFE, the FormatOrAnsiString field MUST
// be 4 bytes in size and MUST contain a standard clipboard format identifier.
// If this set to a value other than 0x00000000, the FormatOrAnsiString field MUST be set to a
// null-terminated ANSI string containing the name of a registered clipboard format and the
// MarkerOrLength field MUST be set to the number of ANSI characters in the FormatOrAnsiString field,
// including the terminating null character.
var markerOrLength = binaryReader.ReadUInt32();
switch (markerOrLength)
{
case 0x00000000:
// Skip
break;
case 0xFFFFFFFF:
case 0xFFFFFFFE:
ClipboardFormat = (OleClipboardFormat)binaryReader.ReadUInt32();
break;
default:
binaryReader.BaseStream.Position -= 4;
StringFormat = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
break;
}
// Reserved1 (variable): If present, this MUST be a LengthPrefixedAnsiString structure. If the Length
// field of the LengthPrefixedAnsiString contains a value of 0 or a value that is greater than 0x00000028,
// the remaining fields of the structure starting with the String field of the LengthPrefixedAnsiString
// MUST be ignored on processing.
var reserved1Length = binaryReader.ReadUInt32();
if (reserved1Length <= 0x00000028)
{
binaryReader.BaseStream.Position -= 4;
// ReSharper disable once UnusedVariable
var reserved1 = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
}
// UnicodeMarker (variable): If this field is present and is NOT set to 0x71B239F4, the remaining fields
// of the structure MUST be ignored on processing.
var unicodeMarker = binaryReader.ReadUInt32();
if (unicodeMarker == 0x71B239F4)
{
markerOrLength = binaryReader.ReadUInt32();
switch (markerOrLength)
{
case 0x00000000:
// Skip
break;
case 0xFFFFFFFF:
case 0xFFFFFFFE:
ClipboardFormat = (OleClipboardFormat)binaryReader.ReadUInt32();
break;
default:
binaryReader.BaseStream.Position -= 4;
StringFormat = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
break;
}
}
}
}
/// <summary>
/// Creates this object and sets all its properties
/// </summary>
/// <param name="stream">The Compound File Storage CompObj <see cref="CFStream" /></param>
internal CompObjStream(ICFStream stream)
{
using (var memoryStream = new MemoryStream(stream.GetData()))
using (var binaryReader = new BinaryReader(memoryStream))
{
// Reserved1 (4 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Version (4 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Reserved2 (20 bytes): This can be set to any arbitrary value and MUST be ignored on processing.
// Skip the first 28 bytes, this is the CompObjHeader
binaryReader.ReadBytes(28);
// This MUST be a LengthPrefixedAnsiString structure that contains a display name of the linked
// object or embedded object.
AnsiUserType = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
// MarkerOrLength (4 bytes): If this is set to 0x00000000, the FormatOrAnsiString field MUST NOT
// be present. If this field is set to 0xFFFFFFFF or 0xFFFFFFFE, the FormatOrAnsiString field MUST
// be 4 bytes in size and MUST contain a standard clipboard format identifier.
// If this set to a value other than 0x00000000, the FormatOrAnsiString field MUST be set to a
// null-terminated ANSI string containing the name of a registered clipboard format and the
// MarkerOrLength field MUST be set to the number of ANSI characters in the FormatOrAnsiString field,
// including the terminating null character.
var markerOrLength = binaryReader.ReadUInt32();
switch (markerOrLength)
{
case 0x00000000:
// Skip
break;
case 0xFFFFFFFF:
case 0xFFFFFFFE:
ClipboardFormat = (OleClipboardFormat) binaryReader.ReadUInt32();
break;
default:
binaryReader.BaseStream.Position -= 4;
StringFormat = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
break;
}
// Reserved1 (variable): If present, this MUST be a LengthPrefixedAnsiString structure. If the Length
// field of the LengthPrefixedAnsiString contains a value of 0 or a value that is greater than 0x00000028,
// the remaining fields of the structure starting with the String field of the LengthPrefixedAnsiString
// MUST be ignored on processing.
var reserved1Length = binaryReader.ReadUInt32();
if (reserved1Length <= 0x00000028)
{
binaryReader.BaseStream.Position -= 4;
// ReSharper disable once UnusedVariable
var reserved1 = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
}
// UnicodeMarker (variable): If this field is present and is NOT set to 0x71B239F4, the remaining fields
// of the structure MUST be ignored on processing.
var unicodeMarker = binaryReader.ReadUInt32();
if (unicodeMarker == 0x71B239F4)
{
markerOrLength = binaryReader.ReadUInt32();
switch (markerOrLength)
{
case 0x00000000:
// Skip
break;
case 0xFFFFFFFF:
case 0xFFFFFFFE:
ClipboardFormat = (OleClipboardFormat) binaryReader.ReadUInt32();
break;
default:
binaryReader.BaseStream.Position -= 4;
StringFormat = Strings.Read4ByteLengthPrefixedAnsiString(binaryReader);
break;
}
}
}
}
