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Package ais :: Module ais_msg_20
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Module ais_msg_20

source code

Autogenerated python functions to serialize/deserialize binary messages.

Generated by: ./aisxmlbinmsg2py.py

Need to then wrap these functions with the outer AIS packet and then convert the whole binary blob to a NMEA string. Those functions are not currently provided in this file.

serialize: python to ais binary deserialize: ais binary to python

The generated code uses translators.py, binary.py, and aisstring.py which should be packaged with the resulting files.

Requires:

Author: xmlbinmsg

Version: 4791

Status: under development

License: Generated code has no license

To Do: FIX: put in a description of the message here with fields and types.

Date: 2008-01-09

Classes [hide private]
  Testdatalinkmng
Use testvalue tag text from each type to build test case the datalinkmng message
Functions [hide private]
BitVector
encode(params, validate=False)
Create a datalinkmng binary message payload to pack into an AIS Msg datalinkmng.		 source code
dict
decode(bv, validate=False)
Unpack a datalinkmng message		 source code
 
decodeMessageID(bv, validate=False) source code
 
decodeRepeatIndicator(bv, validate=False) source code
 
decodeUserID(bv, validate=False) source code
 
decodeSpare(bv, validate=False) source code
 
decodeoffset1(bv, validate=False) source code
 
decodenumslots1(bv, validate=False) source code
 
decodetimeout1(bv, validate=False) source code
 
decodeincrement1(bv, validate=False) source code
 
decodeoffset2(bv, validate=False) source code
 
decodenumslots2(bv, validate=False) source code
 
decodetimeout2(bv, validate=False) source code
 
decodeincrement2(bv, validate=False) source code
 
decodeoffset3(bv, validate=False) source code
 
decodenumslots3(bv, validate=False) source code
 
decodetimeout3(bv, validate=False) source code
 
decodeincrement3(bv, validate=False) source code
 
decodeoffset4(bv, validate=False) source code
 
decodenumslots4(bv, validate=False) source code
 
decodetimeout4(bv, validate=False) source code
 
decodeincrement4(bv, validate=False) source code
 
decodevariablespare(bv, validate=False) source code
 
printHtml(params, out=sys.stdout) source code
stdout
printFields(params, out=sys.stdout, format='std', fieldList=None, dbType='postgres')
Print a datalinkmng message to stdout.		 source code
str
sqlCreateStr(outfile=sys.stdout, fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')
Return the SQL CREATE command for this message type		 source code
sqlhelp.create
sqlCreate(fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')
Return the sqlhelp object to create the table.		 source code
str
sqlInsertStr(params, outfile=sys.stdout, extraParams=None, dbType='postgres')
Return the SQL INSERT command for this message type		 source code
sqlhelp.insert
sqlInsert(params, extraParams=None, dbType='postgres')
Give the SQL INSERT statement		 source code
str
latexDefinitionTable(outfile=sys.stdout)
Return the LaTeX definition table for this message type		 source code
str
textDefinitionTable(outfile=sys.stdout, delim='\t')
Return the text definition table for this message type		 source code
dict
testParams()
Return a params file base on the testvalue tags.		 source code
 
addMsgOptions(parser) source code
Variables [hide private]
  TrueBV = BitVector(bitstring= "1")
Why always rebuild the True bit? This should speed things up a bunch
  FalseBV = BitVector(bitstring= "0")
Why always rebuild the False bit? This should speed things up a bunch
  fieldList = ('MessageID', 'RepeatIndicator', 'UserID', 'Spare'...
  fieldListPostgres = ('MessageID', 'RepeatIndicator', 'UserID',...
  toPgFields = {}
Go to the Postgis field names from the straight field name
  fromPgFields = {}
Go from the Postgis field names to the straight field name
  pgTypes = {}
Lookup table for each postgis field name to get its type.
  RepeatIndicatorEncodeLut = {'default': '0', 'do not repeat any...
  RepeatIndicatorDecodeLut = {'0': 'default', '3': 'do not repea...
  dbTableName = 'datalinkmng'
Database table name
Function Details [hide private]

encode(params, validate=False)

source code 

Create a datalinkmng binary message payload to pack into an AIS Msg datalinkmng.

Fields in params:
  • MessageID(uint): AIS message number. Must be 20 (field automatically set to "20")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Not used. Should be set to zero. (field automatically set to "0")
  • offset1(uint): Reserved offset number
  • numslots1(uint): Number of reserved consecutive slots
  • timeout1(uint): Time-out value in minutes
  • increment1(uint): Increment to repeast reservation of this block
  • offset2(uint): Reserved offset number (optional)
  • numslots2(uint): Number of reserved consecutive slots (optional)
  • timeout2(uint): Time-out value in minutes (optional)
  • increment2(uint): Increment to repeast reservation of this block (optional)
  • offset3(uint): Reserved offset number (optional)
  • numslots3(uint): Number of reserved consecutive slots (optional)
  • timeout3(uint): Time-out value in minutes (optional)
  • increment3(uint): Increment to repeast reservation of this block (optional)
  • offset4(uint): Reserved offset number (optional)
  • numslots4(uint): Number of reserved consecutive slots (optional)
  • timeout4(uint): Time-out value in minutes (optional)
  • increment4(uint): Increment to repeast reservation of this block (optional)
  • variablespare(uint): This field is a serious pain. This padding makes the message byte aligned (field automatically set to "0")
Parameters:
  • params - Dictionary of field names/values. Throws a ValueError exception if required is missing
  • validate - Set to true to cause checking to occur. Runs slower. FIX: not implemented.
Returns: BitVector
encoded binary message (for binary messages, this needs to be wrapped in a msg 8

Note: The returned bits may not be 6 bit aligned. It is up to you to pad out the bits.

decode(bv, validate=False)

source code 

Unpack a datalinkmng message

Fields in params:
  • MessageID(uint): AIS message number. Must be 20 (field automatically set to "20")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Not used. Should be set to zero. (field automatically set to "0")
  • offset1(uint): Reserved offset number
  • numslots1(uint): Number of reserved consecutive slots
  • timeout1(uint): Time-out value in minutes
  • increment1(uint): Increment to repeast reservation of this block
  • offset2(uint): Reserved offset number (optional)
  • numslots2(uint): Number of reserved consecutive slots (optional)
  • timeout2(uint): Time-out value in minutes (optional)
  • increment2(uint): Increment to repeast reservation of this block (optional)
  • offset3(uint): Reserved offset number (optional)
  • numslots3(uint): Number of reserved consecutive slots (optional)
  • timeout3(uint): Time-out value in minutes (optional)
  • increment3(uint): Increment to repeast reservation of this block (optional)
  • offset4(uint): Reserved offset number (optional)
  • numslots4(uint): Number of reserved consecutive slots (optional)
  • timeout4(uint): Time-out value in minutes (optional)
  • increment4(uint): Increment to repeast reservation of this block (optional)
  • variablespare(uint): This field is a serious pain. This padding makes the message byte aligned (field automatically set to "0")
Parameters:
  • bv (BitVector) - Bits defining a message
  • validate - Set to true to cause checking to occur. Runs slower. FIX: not implemented.
Returns: dict
params

printFields(params, out=sys.stdout, format='std', fieldList=None, dbType='postgres')

source code 

Print a datalinkmng message to stdout.

Fields in params:
  • MessageID(uint): AIS message number. Must be 20 (field automatically set to "20")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Not used. Should be set to zero. (field automatically set to "0")
  • offset1(uint): Reserved offset number
  • numslots1(uint): Number of reserved consecutive slots
  • timeout1(uint): Time-out value in minutes
  • increment1(uint): Increment to repeast reservation of this block
  • offset2(uint): Reserved offset number (optional)
  • numslots2(uint): Number of reserved consecutive slots (optional)
  • timeout2(uint): Time-out value in minutes (optional)
  • increment2(uint): Increment to repeast reservation of this block (optional)
  • offset3(uint): Reserved offset number (optional)
  • numslots3(uint): Number of reserved consecutive slots (optional)
  • timeout3(uint): Time-out value in minutes (optional)
  • increment3(uint): Increment to repeast reservation of this block (optional)
  • offset4(uint): Reserved offset number (optional)
  • numslots4(uint): Number of reserved consecutive slots (optional)
  • timeout4(uint): Time-out value in minutes (optional)
  • increment4(uint): Increment to repeast reservation of this block (optional)
  • variablespare(uint): This field is a serious pain. This padding makes the message byte aligned (field automatically set to "0")
Parameters:
  • params - Dictionary of field names/values.
  • out - File like object to write to
Returns: stdout
text to out

sqlCreateStr(outfile=sys.stdout, fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')

source code 
Return the SQL CREATE command for this message type
Parameters:
  • outfile - file like object to print to.
  • fields - which fields to put in the create. Defaults to all.
  • extraFields - A sequence of tuples containing (name,sql type) for additional fields
  • addCoastGuardFields (bool) - Add the extra fields that come after the NMEA check some from the USCG N-AIS format
  • dbType - Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres')
Returns: str
sql create string

See Also: sqlCreate

sqlCreate(fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')

source code 
Return the sqlhelp object to create the table.
Parameters:
  • fields - which fields to put in the create. Defaults to all.
  • extraFields - A sequence of tuples containing (name,sql type) for additional fields
  • addCoastGuardFields (bool) - Add the extra fields that come after the NMEA check some from the USCG N-AIS format
  • dbType - Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres')
Returns: sqlhelp.create
An object that can be used to generate a return

sqlInsertStr(params, outfile=sys.stdout, extraParams=None, dbType='postgres')

source code 
Return the SQL INSERT command for this message type
Parameters:
  • params - dictionary of values keyed by field name
  • outfile - file like object to print to.
  • extraParams - A sequence of tuples containing (name,sql type) for additional fields
Returns: str
sql create string

See Also: sqlCreate

sqlInsert(params, extraParams=None, dbType='postgres')

source code 
Give the SQL INSERT statement
Parameters:
  • params - dict keyed by field name of values
  • extraParams - any extra fields that you have created beyond the normal ais message fields
Returns: sqlhelp.insert
insert class instance

To Do: allow optional type checking of params?

Warning: this will take invalid keys happily and do what???

latexDefinitionTable(outfile=sys.stdout)

source code 
Return the LaTeX definition table for this message type
Parameters:
  • outfile (file obj) - file like object to print to.
Returns: str
LaTeX table string via the outfile

textDefinitionTable(outfile=sys.stdout, delim='\t')

source code 
Return the text definition table for this message type
Parameters:
  • outfile (file obj) - file like object to print to.
Returns: str
text table string via the outfile

testParams()

source code 
Return a params file base on the testvalue tags.
Returns: dict
params based on testvalue tags

Variables Details [hide private]

fieldList

Value:
('MessageID',
 'RepeatIndicator',
 'UserID',
 'Spare',
 'offset1',
 'numslots1',
 'timeout1',
 'increment1',
...

fieldListPostgres

Value:
('MessageID',
 'RepeatIndicator',
 'UserID',
 'Spare',
 'offset1',
 'numslots1',
 'timeout1',
 'increment1',
...

RepeatIndicatorEncodeLut

Value:
{'default': '0', 'do not repeat any more': '3'}

RepeatIndicatorDecodeLut

Value:
{'0': 'default', '3': 'do not repeat any more'}

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