com.ohrasys.cad.gds
Class GDSRecord

java.lang.Object
  com.ohrasys.cad.gds.GDSRecord

Direct Known Subclasses:

GDSAngleRecord, GDSArefRecord, GDSAttrtableRecord, GDSBgnextnRecord, GDSBgnlibRecord, GDSBgnstrRecord, GDSBorderRecord, GDSBoundaryRecord, GDSBoxRecord, GDSBoxtypeRecord, GDSColrowRecord, GDSContactRecord, GDSDatatypeRecord, GDSElflagsRecord, GDSElkeyRecord, GDSEndelRecord, GDSEndextnRecord, GDSEndlibRecord, GDSEndmasksRecord, GDSEndstrRecord, GDSFontsRecord, GDSFormatRecord, GDSGenerationsRecord, GDSHardfenceRecord, GDSHardwireRecord, GDSHeaderRecord, GDSLayerRecord, GDSLibdirsizeRecord, GDSLibnameRecord, GDSLibsecurRecord, GDSLinkkeysRecord, GDSLinktypeRecord, GDSMagRecord, GDSMaskRecord, GDSNodeportRecord, GDSNodeRecord, GDSNodetypeRecord, GDSNullRecord, GDSPathportRecord, GDSPathRecord, GDSPathtypeRecord, GDSPlexRecord, GDSPresentationRecord, GDSPropattrRecord, GDSPropvalueRecord, GDSReflibsRecord, GDSReservedRecord, GDSSnameRecord, GDSSoftfenceRecord, GDSSoftwireRecord, GDSSpacererrorRecord, GDSSpacingRecord, GDSSrefRecord, GDSSrfnameRecord, GDSStransRecord, GDSStrclassRecord, GDSStringRecord, GDSStrnameRecord, GDSStrtypeRecord, GDSStyptableRecord, GDSTapecodeRecord, GDSTapenumRecord, GDSTextnodeRecord, GDSTextRecord, GDSTexttypeRecord, GDSUintegerRecord, GDSUnitsRecord, GDSUserconstraintRecord, GDSUstringRecord, GDSWidthRecord, GDSXyRecord

public class GDSRecord
extends java.lang.Object

This class represents a generic GDSII stream record. A stream record is a byte stream that is divided into four parts.

1. Size field - The first two bytes form an integer that declares the total number of bytes in the record.
2. Record type field - The third byte specifies the record type
3. Data type field - The fourth byte specifies the data type
4. Data field - The remaining bytes are record data

The records of the stream are normally divided in 2048 byte physical blocks. Records can overlap block boundaries; A record is not required to be wholly contained in a single physical block. Two consecutive zero bytes are a null word. Null words can be used to fill the space between the last record of a library and the end of its physical block. All GDSII records must be an even multiple of bytes. If a record contains ASCII string data and the ASCII string is an odd number of bytes, the last character is a null character. Please see The GDSII techincal reference for a more complete discussion of the GDSII stream syntax.

Since:

1.5

Field Summary

static byte	ANGLE ANGLE record type
static byte	AREF AREF record type
static int	AREF_ELEM_TYPE AREF element identifier
static byte	ATTRTABLE ATTRTABLE record type
static byte	BGNEXTN BGNEXTN record type
static byte	BGNLIB BGNLIB record type
static byte	BGNSTR BGNSTR record type
static byte	BIT_ARRAY_TYPE Indicates that record data is a two byte bit array.
static byte	BORDER BORDER record type
static byte	BOUNDARY BOUNDARY record type
static int	BOUNDARY_ELEM_TYPE BOUNDARY element identifier
static byte	BOX BOX record type
static int	BOX_ELEM_TYPE BOX element identifier
static byte	BOXTYPE BOXTYPE record type
static byte	COLROW COLROW record type
static byte	CONTACT CONTACT record type
static int	CONTACT_ELEM_TYPE CONTACT element identifier
protected byte[]	data The record data.
static byte	DATATYPE DATATYPE record type
protected byte	dattype The data type of the record.
static byte	DOUBLE_TYPE Indicates the record data is eight byte floating point.
static byte	ELFLAGS ELFLAGS record type
static byte	ELKEY ELKEY record type
static byte	ENDEL ENDEL record type
static byte	ENDEXTN ENDEXTN record type
static byte	ENDLIB ENDLIB record type
static byte	ENDMASKS ENDMASKS record type
static byte	ENDSTR ENDSTR record type
static byte	FLOAT_TYPE Indicates the record data is four byte floating point.
static byte	FONTS FONTS record type
static byte	FORMAT FORMAT record type
static byte	GENERATIONS GENERATIONS record type
static byte	HARDFENCE HARDFENCE record type
static byte	HARDWIRE HARDWIRE record type
static byte	HEADER HEADER record type
protected com.ohrasys.cad.gds.GDSI18NFactory	i18n The internationalized message factory
static byte	INT_TYPE Indicates the record data type is four byte signed integer.
static byte	LAYER LAYER record type
protected short	length The sum total length of all record fields.
static byte	LIBDIRSIZE LIBDIRSIZE record type
static byte	LIBNAME LIBNAME record type
static byte	LIBSECUR LIBSECUR record type
static byte	LINKKEYS LINKKEYS record type
static byte	LINKTYPE LINKTYPE record type
static byte	MAG MAG record type
static byte	MASK MASK record type
static int	MAX_REC_LEN The maximum number of data bytes a record may contain
static byte	NO_DATA_TYPE Indicates a record has no data associated with it.
static byte	NODE NODE record type
static int	NODE_ELEM_TYPE NODE element identifier
static byte	NODEPORT NODEPORT record type
static byte	NODETYPE NODETYPE record type
static byte	NULL NULL record type
static byte	PATH PATH record type
static int	PATH_ELEM_TYPE PATH element identifier
static byte	PATHPORT PATHPORT record type
static byte	PATHTYPE PATHTYPE record type
static byte	PLEX PLEX record type
static byte	PRESENTATION PRESENTATION record type
static byte	PROPATTR PROPATTR record type
static byte	PROPVALUE PROPVALUE record type
protected byte	rectype The record type.
static byte	REFLIBS REFLIBS record type
static byte	RESERVED RESERVED record type
static byte	SHORT_TYPE Indicates the record data type is two byte signed integer.
static byte	SNAME SNAME record type
static byte	SOFTFENCE SOFTFENCE record type
static byte	SOFTWIRE SOFTWIRE record type
static byte	SPACER_ERROR SPACER_ERROR record type
static byte	SPACING SPACING record type
static byte	SREF SREF record type
static int	SREF_ELEM_TYPE SREF element identifier
static byte	SRFNAME SRFNAME record type
static byte	STRANS STRANS record type
static byte	STRCLASS STRCLASS record type
static byte	STRING STRING record type
static byte	STRING_TYPE Indicates the record data is ASCII string data.
static byte	STRNAME STRNAME record type
static byte	STRTYPE STRTYPE record type
static byte	STYPTABLE STYPTABLE record type
static byte	TAPECODE TAPECODE record type
static byte	TAPENUM TAPENUM record type
static byte	TEXT TEXT record type
static int	TEXT_ELEM_TYPE TEXT element identifier
static byte	TEXTNODE TEXTNODE record type
static byte	TEXTTYPE TEXTTYPE record type
static byte	UINTEGER UINTEGER record type
static byte	UNITS UNITS record type
static byte	USERCONSTRAINT USERCONSTRAINT record type
static byte	USTRING USTRING record type
static byte	WIDTH WIDTH record type
static byte	XY XY record type

Constructor Summary

GDSRecord()
Creates a new NULL GDSRecord object.

GDSRecord(GDSRecord rec)
Creates a new GDSRecord object from an existing record.

GDSRecord(short length, byte rectype, byte dattype, byte[] data)
Creates a new GDSRecord object.

Method Summary

byte[]	getData() Returns a copy of the data
byte	getDattype() The datatype of the record
short	getLength() Return the total record length
byte	getRectype() Return the record type
byte[]	toBytes() Creates a byte array representation of this gds record suitable for consumption by a stream reader/writer.
java.lang.String	toString() Returns a descriptive string representation of the record.
protected void	validateBitarrayRec(byte rectype, short validbits) Ensures a record is well formed, of the expected record type, of bit array datatype and that no reserved fields are being utilized.
protected void	validateDoubleRec(byte rectype) Ensures a record is well formed, of the expected record type and of double datatype
protected void	validateDoubleRec(byte rectype, int len) Ensures a record is well formed, of the expected record type, of double datatype and contains len number of data bytes
protected void	validateDoubleRec(byte rectype, int maxlen, int minlen) Ensures a record is well formed, of the expected record type, of double datatype and contains between min and max number of data bytes
protected void	validateFloatRec(byte rectype) Ensures a record is well formed, of the expected record type and of float datatype
protected void	validateFloatRec(byte rectype, int len) Ensures a record is well formed, of the expected record type, of float datatype and contains len number of data bytes
protected void	validateFloatRec(byte rectype, int maxlen, int minlen) Ensures a record is well formed, of the expected record type, of float datatype and contains between min and max number of data bytes
protected void	validateIntRec(byte rectype) Ensures a record is well formed, of the expected record type and of int datatype
protected void	validateIntRec(byte rectype, int len) Ensures a record is well formed, of the expected record type, of int datatype and contains len number of data bytes
protected void	validateIntRec(byte rectype, int maxlen, int minlen) Ensures a record is well formed, of the expected record type, of int datatype and contains between min and max number of data bytes
protected void	validateNodataRec(byte rectype) Ensures a record is well formed, of the expected record type and of no data type
protected void	validateShortRec(byte rectype) Ensures a record is well formed, of the expected record type and of short datatype
protected void	validateShortRec(byte rectype, int len) Ensures a record is well formed, of the expected record type, of short datatype and contains len number of data bytes
protected void	validateShortRec(byte rectype, int maxlen, int minlen) Ensures a record is well formed, of the expected record type, of short datatype and contains between min and max number of data bytes
protected void	validateStringRec(byte rectype, int len) Ensures a record is well formed, of the expected record type, of string datatype and contains len number of data bytes
protected void	validateStringRec(byte rectype, int maxlen, int minlen) Ensures a record is well formed, of the expected record type, of string datatype and contains between min and max number of data bytes

Methods inherited from class java.lang.Object

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

Field Detail

NO_DATA_TYPE

public static final byte NO_DATA_TYPE

Indicates a record has no data associated with it. Records with this datatype should have a record size of 4 bytes.

See Also:

Constant Field Values

BIT_ARRAY_TYPE

public static final byte BIT_ARRAY_TYPE

Indicates that record data is a two byte bit array.

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SHORT_TYPE

public static final byte SHORT_TYPE

Indicates the record data type is two byte signed integer.

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INT_TYPE

public static final byte INT_TYPE

Indicates the record data type is four byte signed integer.

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FLOAT_TYPE

public static final byte FLOAT_TYPE

Indicates the record data is four byte floating point.

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DOUBLE_TYPE

public static final byte DOUBLE_TYPE

Indicates the record data is eight byte floating point.

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STRING_TYPE

public static final byte STRING_TYPE

Indicates the record data is ASCII string data. If the string contains an odd number of characters, a null character is appended. The record byte count includes this null character.

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NULL

public static final byte NULL

NULL record type

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HEADER

public static final byte HEADER

HEADER record type

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BGNLIB

public static final byte BGNLIB

BGNLIB record type

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LIBNAME

public static final byte LIBNAME

LIBNAME record type

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UNITS

public static final byte UNITS

UNITS record type

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ENDLIB

public static final byte ENDLIB

ENDLIB record type

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BGNSTR

public static final byte BGNSTR

BGNSTR record type

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STRNAME

public static final byte STRNAME

STRNAME record type

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ENDSTR

public static final byte ENDSTR

ENDSTR record type

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BOUNDARY

public static final byte BOUNDARY

BOUNDARY record type

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PATH

public static final byte PATH

PATH record type

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SREF

public static final byte SREF

SREF record type

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AREF

public static final byte AREF

AREF record type

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TEXT

public static final byte TEXT

TEXT record type

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LAYER

public static final byte LAYER

LAYER record type

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DATATYPE

public static final byte DATATYPE

DATATYPE record type

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WIDTH

public static final byte WIDTH

WIDTH record type

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XY

public static final byte XY

XY record type

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ENDEL

public static final byte ENDEL

ENDEL record type

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SNAME

public static final byte SNAME

SNAME record type

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COLROW

public static final byte COLROW

COLROW record type

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TEXTNODE

public static final byte TEXTNODE

TEXTNODE record type

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NODE

public static final byte NODE

NODE record type

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TEXTTYPE

public static final byte TEXTTYPE

TEXTTYPE record type

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PRESENTATION

public static final byte PRESENTATION

PRESENTATION record type

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SPACING

public static final byte SPACING

SPACING record type

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STRING

public static final byte STRING

STRING record type

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STRANS

public static final byte STRANS

STRANS record type

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MAG

public static final byte MAG

MAG record type

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ANGLE

public static final byte ANGLE

ANGLE record type

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UINTEGER

public static final byte UINTEGER

UINTEGER record type

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USTRING

public static final byte USTRING

USTRING record type

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REFLIBS

public static final byte REFLIBS

REFLIBS record type

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FONTS

public static final byte FONTS

FONTS record type

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PATHTYPE

public static final byte PATHTYPE

PATHTYPE record type

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GENERATIONS

public static final byte GENERATIONS

GENERATIONS record type

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ATTRTABLE

public static final byte ATTRTABLE

ATTRTABLE record type

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STYPTABLE

public static final byte STYPTABLE

STYPTABLE record type

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STRTYPE

public static final byte STRTYPE

STRTYPE record type

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ELFLAGS

public static final byte ELFLAGS

ELFLAGS record type

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ELKEY

public static final byte ELKEY

ELKEY record type

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LINKTYPE

public static final byte LINKTYPE

LINKTYPE record type

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LINKKEYS

public static final byte LINKKEYS

LINKKEYS record type

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NODETYPE

public static final byte NODETYPE

NODETYPE record type

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PROPATTR

public static final byte PROPATTR

PROPATTR record type

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PROPVALUE

public static final byte PROPVALUE

PROPVALUE record type

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BOX

public static final byte BOX

BOX record type

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BOXTYPE

public static final byte BOXTYPE

BOXTYPE record type

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PLEX

public static final byte PLEX

PLEX record type

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BGNEXTN

public static final byte BGNEXTN

BGNEXTN record type

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ENDEXTN

public static final byte ENDEXTN

ENDEXTN record type

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TAPENUM

public static final byte TAPENUM

TAPENUM record type

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TAPECODE

public static final byte TAPECODE

TAPECODE record type

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STRCLASS

public static final byte STRCLASS

STRCLASS record type

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RESERVED

public static final byte RESERVED

RESERVED record type

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FORMAT

public static final byte FORMAT

FORMAT record type

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MASK

public static final byte MASK

MASK record type

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ENDMASKS

public static final byte ENDMASKS

ENDMASKS record type

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LIBDIRSIZE

public static final byte LIBDIRSIZE

LIBDIRSIZE record type

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SRFNAME

public static final byte SRFNAME

SRFNAME record type

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LIBSECUR

public static final byte LIBSECUR

LIBSECUR record type

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BORDER

public static final byte BORDER

BORDER record type

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SOFTFENCE

public static final byte SOFTFENCE

SOFTFENCE record type

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HARDFENCE

public static final byte HARDFENCE

HARDFENCE record type

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SOFTWIRE

public static final byte SOFTWIRE

SOFTWIRE record type

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HARDWIRE

public static final byte HARDWIRE

HARDWIRE record type

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PATHPORT

public static final byte PATHPORT

PATHPORT record type

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NODEPORT

public static final byte NODEPORT

NODEPORT record type

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USERCONSTRAINT

public static final byte USERCONSTRAINT

USERCONSTRAINT record type

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SPACER_ERROR

public static final byte SPACER_ERROR

SPACER_ERROR record type

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CONTACT

public static final byte CONTACT

CONTACT record type

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PATH_ELEM_TYPE

public static final int PATH_ELEM_TYPE

PATH element identifier

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BOUNDARY_ELEM_TYPE

public static final int BOUNDARY_ELEM_TYPE

BOUNDARY element identifier

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TEXT_ELEM_TYPE

public static final int TEXT_ELEM_TYPE

TEXT element identifier

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CONTACT_ELEM_TYPE

public static final int CONTACT_ELEM_TYPE

CONTACT element identifier

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SREF_ELEM_TYPE

public static final int SREF_ELEM_TYPE

SREF element identifier

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NODE_ELEM_TYPE

public static final int NODE_ELEM_TYPE

NODE element identifier

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BOX_ELEM_TYPE

public static final int BOX_ELEM_TYPE

BOX element identifier

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AREF_ELEM_TYPE

public static final int AREF_ELEM_TYPE

AREF element identifier

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MAX_REC_LEN

public static final int MAX_REC_LEN

The maximum number of data bytes a record may contain

See Also:

Constant Field Values

data

protected byte[] data

The record data.

dattype

protected byte dattype

The data type of the record.

i18n

protected com.ohrasys.cad.gds.GDSI18NFactory i18n

The internationalized message factory

length

protected short length

The sum total length of all record fields.

rectype

protected byte rectype

The record type.

Constructor Detail

GDSRecord

public GDSRecord()
          throws GDSRecordException

Creates a new NULL GDSRecord object.

Throws:

GDSRecordException - If there is an error creating the record

GDSRecord

public GDSRecord(GDSRecord rec)
          throws GDSRecordException

Creates a new GDSRecord object from an existing record.

Parameters:

rec - The record to duplicate

Throws:

GDSRecordException - If the record is malformed

GDSRecord

public GDSRecord(short length,
                 byte rectype,
                 byte dattype,
                 byte[] data)
          throws GDSRecordException

Creates a new GDSRecord object.

Parameters:

length - The total record length

rectype - The record type

dattype - The datatype

data - The record data

Throws:

GDSRecordException - If any of the input parameters would create a malformed record

Method Detail

getData

public byte[] getData()

Returns a copy of the data

Returns:

The record data

getDattype

public byte getDattype()

The datatype of the record

Returns:

Record datatype

getLength

public short getLength()

Return the total record length

Returns:

length

getRectype

public byte getRectype()

Return the record type

Returns:

Record type

toBytes

public byte[] toBytes()

Creates a byte array representation of this gds record suitable for consumption by a stream reader/writer.

Returns:

A byte array representation of the record

toString

public java.lang.String toString()

Returns a descriptive string representation of the record.

Overrides:

toString in class java.lang.Object

Returns:

The record description

validateBitarrayRec

protected void validateBitarrayRec(byte rectype,
                                   short validbits)
                            throws GDSRecordException

Ensures a record is well formed, of the expected record type, of bit array datatype and that no reserved fields are being utilized.

Parameters:

rectype - The expected record type

validbits - A bit mask identifying valid bit positions by a '1'

Throws:

GDSRecordException - Thrown if the record is invalid

validateDoubleRec

protected void validateDoubleRec(byte rectype)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type and of double datatype

Parameters:

rectype - Expected record type

Throws:

GDSRecordException - Thrown if the record is invalid

validateDoubleRec

protected void validateDoubleRec(byte rectype,
                                 int len)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type, of double datatype and contains len number of data bytes

Parameters:

rectype - Expected record type

len - Expected number of data bytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateDoubleRec

protected void validateDoubleRec(byte rectype,
                                 int maxlen,
                                 int minlen)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type, of double datatype and contains between min and max number of data bytes

Parameters:

rectype - Expected record type

maxlen - Max number of data bytes

minlen - Min number of databytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateFloatRec

protected void validateFloatRec(byte rectype)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type and of float datatype

Parameters:

rectype - Expected record type

Throws:

GDSRecordException - Thrown if the record is invalid

validateFloatRec

protected void validateFloatRec(byte rectype,
                                int len)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type, of float datatype and contains len number of data bytes

Parameters:

rectype - Expected record type

len - Expected number of data bytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateFloatRec

protected void validateFloatRec(byte rectype,
                                int maxlen,
                                int minlen)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type, of float datatype and contains between min and max number of data bytes

Parameters:

rectype - Expected record type

maxlen - Max number of data bytes

minlen - Min number of databytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateIntRec

protected void validateIntRec(byte rectype)
                       throws GDSRecordException

Ensures a record is well formed, of the expected record type and of int datatype

Parameters:

rectype - Expected record type

Throws:

GDSRecordException - Thrown if the record is invalid

validateIntRec

protected void validateIntRec(byte rectype,
                              int len)
                       throws GDSRecordException

Ensures a record is well formed, of the expected record type, of int datatype and contains len number of data bytes

Parameters:

rectype - Expected record type

len - Expected number of data bytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateIntRec

protected void validateIntRec(byte rectype,
                              int maxlen,
                              int minlen)
                       throws GDSRecordException

Ensures a record is well formed, of the expected record type, of int datatype and contains between min and max number of data bytes

Parameters:

rectype - Expected record type

maxlen - Max number of data bytes

minlen - Min number of databytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateNodataRec

protected void validateNodataRec(byte rectype)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type and of no data type

Parameters:

rectype - Expected record type

Throws:

GDSRecordException - Thrown if the record is invalid

validateShortRec

protected void validateShortRec(byte rectype)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type and of short datatype

Parameters:

rectype - Expected record type

Throws:

GDSRecordException - Thrown if the record is invalid

validateShortRec

protected void validateShortRec(byte rectype,
                                int len)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type, of short datatype and contains len number of data bytes

Parameters:

rectype - Expected record type

len - Expected number of data bytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateShortRec

protected void validateShortRec(byte rectype,
                                int maxlen,
                                int minlen)
                         throws GDSRecordException

Ensures a record is well formed, of the expected record type, of short datatype and contains between min and max number of data bytes

Parameters:

rectype - Expected record type

maxlen - Max number of data bytes

minlen - Min number of databytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateStringRec

protected void validateStringRec(byte rectype,
                                 int len)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type, of string datatype and contains len number of data bytes

Parameters:

rectype - Expected record type

len - Expected number of data bytes

Throws:

GDSRecordException - Thrown if the record is invalid

validateStringRec

protected void validateStringRec(byte rectype,
                                 int maxlen,
                                 int minlen)
                          throws GDSRecordException

Ensures a record is well formed, of the expected record type, of string datatype and contains between min and max number of data bytes

Parameters:

rectype - Expected record type

maxlen - Max number of data bytes

minlen - Min number of databytes

Throws:

GDSRecordException - Thrown if the record is invalid