com.pixelmed.dicom
Class BinaryInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          com.pixelmed.dicom.BinaryInputStream

All Implemented Interfaces:

Closeable

Direct Known Subclasses:

DicomInputStream

public class BinaryInputStream
extends FilterInputStream

A class that extends FilterInputStream by adding the concept of little and big endian binary value encoding, and supplies functions for reading various sized integer and floating point words.

See Also:

BinaryOutputStream

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

BinaryInputStream(File file, boolean big)
Construct a byte ordered stream from the supplied file.

BinaryInputStream(InputStream i, boolean big)
Construct a byte ordered stream from the supplied stream.

Method Summary

File	getFile() Get the file associated with this stream.
boolean	isBigEndian() Is the stream byte order big endian ?
boolean	isLittleEndian() Is the stream byte order little endian ?
static void	main(String[] arg) For testing.
void	readComplexDouble(double[] freal, double[] fimaginary, int len) Read interleaved complex floating point 64 bit value pairs into real and imaginary arrays.
void	readComplexFloat(float[] freal, float[] fimaginary, int len) Read interleaved complex floating point 32 bit value pairs into real and imaginary arrays.
double	readDouble() Read one floating point 64 bit value.
void	readDouble(double[] f, int len) Read an array of floating point 64 bit values.
float	readFloat() Read one floating point 32 bit value.
void	readFloat(float[] f, int len) Read an array of floating point 32 bit values.
void	readInsistently(byte[] b, int offset, int length) Read as many bytes as requested, unless an exception occurs.
int	readSigned16() Read one signed integer 16 bit value.
int	readSigned32() Read one signed integer 32 bit value.
int	readUnsigned16() Read one unsigned integer 16 bit value.
void	readUnsigned16(short[] w, int len) Read an array of unsigned integer 16 bit values.
void	readUnsigned16(short[] w, int offset, int len) Read an array of unsigned integer 16 bit values.
long	readUnsigned32() Read one unsigned integer 32 bit value.
int	readUnsigned8() Read one unsigned integer 8 bit value.
void	setBigEndian() Set the stream byte order to big endian.
void	setEndian(boolean big) Set the stream byte order to that specified.
void	setFile(File file) Set the file associated with this stream.
void	setLittleEndian() Set the stream byte order to little endian.
void	skipInsistently(long length) Skip as many bytes as requested, unless an exception occurs.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BinaryInputStream

public BinaryInputStream(File file,
                         boolean big)
                  throws FileNotFoundException

Construct a byte ordered stream from the supplied file.

The byte order may be changed later.

Parameters:

file - the file to read from

big - true if big endian, false if little endian

Throws:

FileNotFoundException

BinaryInputStream

public BinaryInputStream(InputStream i,
                         boolean big)

Construct a byte ordered stream from the supplied stream.

The byte order may be changed later.

Parameters:

i - the input stream to read from

big - true if big endian, false if little endian

Method Detail

getFile

public File getFile()

Get the file associated with this stream.

Returns:

file the file, or null if not a file input stream

setFile

public void setFile(File file)

Set the file associated with this stream.

This may be used if constructed with a constructor that does not supply a File parameter, e.g., has been indirected through a BufferedInputStream.

Parameters:

file - the file associated with this stream, or null if not a file input stream

isBigEndian

public boolean isBigEndian()

Is the stream byte order big endian ?

Returns:

true if big endian, false if little endian

isLittleEndian

public boolean isLittleEndian()

Is the stream byte order little endian ?

Returns:

true if little endian, false if big endian

setBigEndian

public void setBigEndian()

Set the stream byte order to big endian.

setLittleEndian

public void setLittleEndian()

Set the stream byte order to little endian.

setEndian

public void setEndian(boolean big)

Set the stream byte order to that specified.

Parameters:

big - true if to set to big endian, false if little endian

readInsistently

public void readInsistently(byte[] b,
                            int offset,
                            int length)
                     throws IOException

Read as many bytes as requested, unless an exception occurs.

Parameters:

b - buffer to read into

offset - offset (from 0) in buffer to read into

length - number of bytes to read (no more and no less)

Throws:

IOException

skipInsistently

public void skipInsistently(long length)
                     throws IOException

Skip as many bytes as requested, unless an exception occurs.

Parameters:

length - number of bytes to read (no more and no less)

Throws:

IOException

readUnsigned8

public final int readUnsigned8()
                        throws IOException

Read one unsigned integer 8 bit value.

Returns:

an int containing an unsigned value

Throws:

IOException

readUnsigned16

public final int readUnsigned16()
                         throws IOException

Read one unsigned integer 16 bit value.

Returns:

an int containing an unsigned value

Throws:

IOException

readSigned16

public final int readSigned16()
                       throws IOException

Read one signed integer 16 bit value.

Returns:

an int containing an unsigned value

Throws:

IOException

readUnsigned32

public final long readUnsigned32()
                          throws IOException

Read one unsigned integer 32 bit value.

Returns:

a long containing an unsigned value

Throws:

IOException

readSigned32

public final int readSigned32()
                       throws IOException

Read one signed integer 32 bit value.

Returns:

an int containing an signed value

Throws:

IOException

readFloat

public final float readFloat()
                      throws IOException

Read one floating point 32 bit value.

Returns:

a float value

Throws:

IOException

readDouble

public final double readDouble()
                        throws IOException

Read one floating point 64 bit value.

Returns:

a double value

Throws:

IOException

readUnsigned16

public final void readUnsigned16(short[] w,
                                 int len)
                          throws IOException

Read an array of unsigned integer 16 bit values.

Parameters:

w - an array of sufficient size in which to return the values read

len - the number of 16 bit values to read

Throws:

IOException

readUnsigned16

public final void readUnsigned16(short[] w,
                                 int offset,
                                 int len)
                          throws IOException

Read an array of unsigned integer 16 bit values.

Parameters:

w - an array of sufficient size in which to return the values read

offset - the offset in the array at which to begin storing values

len - the number of 16 bit values to read

Throws:

IOException

readFloat

public final void readFloat(float[] f,
                            int len)
                     throws IOException

Read an array of floating point 32 bit values.

Parameters:

f - an array of sufficient size in which to return the values read

len - the number of 32 bit values to read

Throws:

IOException

readComplexFloat

public final void readComplexFloat(float[] freal,
                                   float[] fimaginary,
                                   int len)
                            throws IOException

Read interleaved complex floating point 32 bit value pairs into real and imaginary arrays.

Parameters:

freal - an array of sufficient size in which to return the real values read, may be null if don't want real values

fimaginary - an array of sufficient size in which to return the real values read, may be null if don't want imaginary values

len - the number of 32 bit values to read

Throws:

IOException

readDouble

public final void readDouble(double[] f,
                             int len)
                      throws IOException

Read an array of floating point 64 bit values.

Parameters:

f - an array of sufficient size in which to return the values read

len - the number of 64 bit values to read

Throws:

IOException

readComplexDouble

public final void readComplexDouble(double[] freal,
                                    double[] fimaginary,
                                    int len)
                             throws IOException

Read interleaved complex floating point 64 bit value pairs into real and imaginary arrays.

Parameters:

freal - an array of sufficient size in which to return the real values read, may be null if don't want real values

fimaginary - an array of sufficient size in which to return the real values read, may be null if don't want imaginary values

len - the number of 64 bit values to read

Throws:

IOException

main

public static void main(String[] arg)

For testing.

Parameters:

arg -