public static void SkipItemLittleEndian(DICOMBinaryReader dr, TransferSyntax syntax)
{
var length = LengthReader.ReadLittleEndian(VR.Null, dr.Skip(4));
if (length != -1)
{
dr.Skip(length);
}
else
{
if (syntax == TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN)
{
while (!IsEndOfSequenceItemLittleEndian(dr) && dr.StreamLength != dr.StreamPosition)
{
dr.StreamPosition -= 8;
DICOMElementReader.SkipElementExplicitLittleEndian(dr);
}
}
else
{
while (!IsEndOfSequenceItemLittleEndian(dr) && dr.StreamLength != dr.StreamPosition)
{
dr.StreamPosition -= 8;
DICOMElementReader.SkipElementImplicitLittleEndian(dr);
}
}
}
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader after the tag and VR have been read
/// </summary>
/// <param name="tag">the DICOM tag of the element</param>
/// <param name="vr">the read VR of the element</param>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns></returns>
private static IDICOMElement ReadElementExplicitLittleEndian(Tag tag, VR vr, DICOMBinaryReader dr, StringEncoding enc)
{
var length = LengthReader.ReadLittleEndian(vr, dr);
var data = DataReader.ReadLittleEndian(length, dr, TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN);
return(ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN, enc));
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader
/// </summary>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns>the next DICOM element</returns>
public static IDICOMElement ReadElementExplicitBigEndian(DICOMBinaryReader dr, StringEncoding enc)
{
var tag = TagReader.ReadBigEndian(dr);
var vr = VRReader.ReadVR(dr);
var length = LengthReader.ReadBigEndian(vr, dr);
var data = DataReader.ReadBigEndian(length, dr);
return(ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.EXPLICIT_VR_BIG_ENDIAN, enc));
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader
/// </summary>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns>the next DICOM element</returns>
public static IDICOMElement ReadElementExplicitBigEndian(DICOMBinaryReader dr)
{
Tag tag = TagReader.ReadBigEndian(dr);
VR vr = VRReader.ReadVR(dr);
int length = LengthReader.ReadBigEndian(vr, dr);
byte[] data = DataReader.ReadBigEndian(length, dr);
return(ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.EXPLICIT_VR_BIG_ENDIAN));
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader
/// </summary>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns>the next DICOM element</returns>
public static IDICOMElement ReadElementExplicitLittleEndian(DICOMBinaryReader dr)
{
var tag = TagReader.ReadLittleEndian(dr);
var vr = VRReader.Read(dr);
int length = LengthReader.ReadLittleEndian(vr, dr);
var data = DataReader.ReadLittleEndian(length, dr, TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN);
return(ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN));
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader
/// </summary>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns>the next DICOM element</returns>
public static IDICOMElement ReadElementImplicitLittleEndian(DICOMBinaryReader dr)
{
var tag = TagReader.ReadLittleEndian(dr);
var vr = TagDictionary.GetVRFromTag(tag);
int length = LengthReader.ReadLittleEndian(VR.Null, dr);
var data = DataReader.ReadLittleEndian(length, dr, TransferSyntax.IMPLICIT_VR_LITTLE_ENDIAN);
var el = ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.IMPLICIT_VR_LITTLE_ENDIAN);
return(el);
}
public static void SkipElementImplicitLittleEndian(DICOMBinaryReader dr)
{
var tag = TagReader.ReadLittleEndian(dr);
var length = LengthReader.ReadLittleEndian(VR.Null, dr);
if (length != -1)
{
dr.Skip(length);
}
else
{
dr.Skip(SequenceReader.ReadIndefiniteLengthLittleEndian(dr, TransferSyntax.IMPLICIT_VR_LITTLE_ENDIAN));
dr.Skip(8);
}
}
public static void SkipElementExplicitBigEndian(DICOMBinaryReader dr)
{
var tag = TagReader.ReadBigEndian(dr);
var vr = VRReader.ReadVR(dr);
var length = LengthReader.ReadBigEndian(vr, dr);
if (length != -1)
{
dr.Skip(length);
}
else
{
dr.Skip(SequenceReader.ReadIndefiniteLengthBigEndian(dr));
dr.Skip(8);
}
}
public static void SkipElementExplicitLittleEndian(DICOMBinaryReader dr)
{
Tag tag = TagReader.ReadLittleEndian(dr);
VR vr = VRReader.ReadVR(dr);
int length = LengthReader.ReadLittleEndian(vr, dr);
if (length != -1)
{
dr.Skip(length);
}
else
{
dr.Skip(SequenceReader.ReadIndefiniteLengthLittleEndian(dr, TransferSyntax.EXPLICIT_VR_LITTLE_ENDIAN));
dr.Skip(8);
}
}
public static DICOMObject ReadBigEndian(DICOMBinaryReader dr, TransferSyntax syntax)
{
DICOMObject d;
int length = LengthReader.ReadLittleEndian(VR.Null, dr.Skip(4));
if (LengthReader.IsIndefinite(length))
{
d = ReadIndefiniteBigEndian(dr, syntax);
}
else
{
d = DICOMObjectReader.ReadObject(dr.ReadBytes(length), syntax);
}
return(d);
}
/// <summary>
/// Reads and returns the next DICOM element starting at the current location in the DICOM binary reader
/// </summary>
/// <param name="dr">the binary reader which is reading the DICOM object</param>
/// <returns>the next DICOM element</returns>
public static IDICOMElement ReadElementImplicitLittleEndian(DICOMBinaryReader dr)
{
Tag tag = TagReader.ReadLittleEndian(dr);
VR vr = TagDictionary.GetVRFromTag(tag);
if (CheckForExplicitness(tag, dr, ref vr))
{
return(ReadElementExplicitLittleEndian(tag, vr, dr));
}
else
{
int length = LengthReader.ReadLittleEndian(VR.Null, dr);
byte[] data = DataReader.ReadLittleEndian(length, dr, TransferSyntax.IMPLICIT_VR_LITTLE_ENDIAN);
IDICOMElement el = ElementFactory.GenerateElement(tag, vr, data, TransferSyntax.IMPLICIT_VR_LITTLE_ENDIAN);
return(el);
}
}
public static void SkipItemBigEndian(DICOMBinaryReader dr)
{
var length = LengthReader.ReadBigEndian(VR.Null, dr.Skip(4));
if (length != -1)
{
dr.Skip(length);
}
else
{
while (!IsEndOfSequenceItemBigEndian(dr) && dr.StreamLength != dr.StreamPosition)
{
dr.StreamPosition -= 8;
DICOMElementReader.SkipElementExplicitBigEndian(dr);
}
}
}
public static DICOMObject ReadLittleEndian(DICOMBinaryReader dr, TransferSyntax syntax)
{
DICOMObject d;
//Skip tag
dr.Skip(4);
int length = LengthReader.ReadLittleEndian(VR.Null, dr);
if (LengthReader.IsIndefinite(length))
{
d = ReadIndefiniteLittleEndian(dr, syntax);
}
else
{
}
return(null);
}
public static DICOMObject ReadBigEndian(DICOMBinaryReader dr, TransferSyntax syntax, StringEncoding enc)
{
DICOMObject d;
//Skip tag
dr.Skip(4);
var length = LengthReader.ReadBigEndian(VR.Null, dr);
if (LengthReader.IsIndefinite(length))
{
d = ReadIndefiniteBigEndian(dr, syntax, enc);
}
else
{
d = DICOMObjectReader.ReadObject(dr.ReadBytes(length), syntax);
}
return(d);
}
