Package ais :: Package sls :: Module estlocktimes
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Source Code for Module ais.sls.estlocktimes

  1  #!/usr/bin/env python 
  2   
  3  __version__ = '$Revision: 4791 $'.split()[1] 
  4  __date__ = '$Date: 2007-03-30 $'.split()[1] 
  5  __author__ = 'xmlbinmsg' 
  6   
  7  __doc__=''' 
  8   
  9  Autogenerated python functions to serialize/deserialize binary messages. 
 10   
 11  Generated by: ../aisxmlbinmsg2py.py 
 12   
 13  Need to then wrap these functions with the outer AIS packet and then 
 14  convert the whole binary blob to a NMEA string.  Those functions are 
 15  not currently provided in this file. 
 16   
 17  serialize: python to ais binary 
 18  deserialize: ais binary to python 
 19   
 20  The generated code uses translators.py, binary.py, and aisstring.py 
 21  which should be packaged with the resulting files. 
 22   
 23   
 24  @requires: U{epydoc<http://epydoc.sourceforge.net/>} > 3.0alpha3 
 25  @requires: U{BitVector<http://cheeseshop.python.org/pypi/BitVector>} 
 26   
 27  @author: '''+__author__+''' 
 28  @version: ''' + __version__ +''' 
 29  @var __date__: Date of last svn commit 
 30  @undocumented: __version__ __author__ __doc__ parser 
 31  @status: under development 
 32  @license: Generated code has no license 
 33  @todo: FIX: put in a description of the message here with fields and types. 
 34  ''' 
 35   
 36  import sys 
 37  from decimal import Decimal 
 38  from BitVector import BitVector 
 39   
 40  import binary, aisstring 
 41   
 42  # FIX: check to see if these will be needed 
 43  TrueBV  = BitVector(bitstring="1") 
 44  "Why always rebuild the True bit?  This should speed things up a bunch" 
 45  FalseBV = BitVector(bitstring="0") 
 46  "Why always rebuild the False bit?  This should speed things up a bunch" 
 47   
 48   
 49  fieldList = ( 
 50          'vessel', 
 51          'direction', 
 52          'ETA_month', 
 53          'ETA_day', 
 54          'ETA_hour', 
 55          'ETA_min', 
 56          'reserved', 
 57  ) 
 58   
 59  fieldListPostgres = ( 
 60          'vessel', 
 61          'direction', 
 62          'ETA_month', 
 63          'ETA_day', 
 64          'ETA_hour', 
 65          'ETA_min', 
 66          'reserved', 
 67  ) 
 68   
 69  toPgFields = { 
 70  } 
 71  ''' 
 72  Go to the Postgis field names from the straight field name 
 73  ''' 
 74   
 75  fromPgFields = { 
 76  } 
 77  ''' 
 78  Go from the Postgis field names to the straight field name 
 79  ''' 
 80   
 81  pgTypes = { 
 82  } 
 83  ''' 
 84  Lookup table for each postgis field name to get its type. 
 85  ''' 
 86   
87 -def encode(params, validate=False):
88 '''Create a sls_lockorder binary message payload to pack into an AIS Msg sls_lockorder. 89 90 Fields in params: 91 - vessel(aisstr6): Vessel Name 92 - direction(bool): Up bound/Down bound 93 - ETA_month(uint): Estimated time of arrival month 1..12 94 - ETA_day(uint): Estimated time of arrival day of the month 1..31 95 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 96 - ETA_min(uint): Estimated time of arrival minutes 97 - reserved(uint): Reserved bits for future use (field automatically set to "0") 98 @param params: Dictionary of field names/values. Throws a ValueError exception if required is missing 99 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 100 @rtype: BitVector 101 @return: encoded binary message (for binary messages, this needs to be wrapped in a msg 8 102 @note: The returned bits may not be 6 bit aligned. It is up to you to pad out the bits. 103 ''' 104 105 bvList = [] 106 if 'vessel' in params: 107 bvList.append(aisstring.encode(params['vessel'],90)) 108 else: 109 bvList.append(aisstring.encode('@@@@@@@@@@@@@@@',90)) 110 if params["direction"]: bvList.append(TrueBV) 111 else: bvList.append(FalseBV) 112 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_month']),4)) 113 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_day']),5)) 114 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_hour']),5)) 115 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_min']),6)) 116 bvList.append(binary.setBitVectorSize(BitVector(intVal=0),19)) 117 118 return binary.joinBV(bvList)
119
120 -def decode(bv, validate=False):
121 '''Unpack a sls_lockorder message 122 123 Fields in params: 124 - vessel(aisstr6): Vessel Name 125 - direction(bool): Up bound/Down bound 126 - ETA_month(uint): Estimated time of arrival month 1..12 127 - ETA_day(uint): Estimated time of arrival day of the month 1..31 128 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 129 - ETA_min(uint): Estimated time of arrival minutes 130 - reserved(uint): Reserved bits for future use (field automatically set to "0") 131 @type bv: BitVector 132 @param bv: Bits defining a message 133 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 134 @rtype: dict 135 @return: params 136 ''' 137 138 #Would be nice to check the bit count here.. 139 #if validate: 140 # assert (len(bv)==FIX: SOME NUMBER) 141 r = {} 142 r['vessel']=aisstring.decode(bv[0:90]) 143 r['direction']=bool(int(bv[90:91])) 144 r['ETA_month']=int(bv[91:95]) 145 r['ETA_day']=int(bv[95:100]) 146 r['ETA_hour']=int(bv[100:105]) 147 r['ETA_min']=int(bv[105:111]) 148 r['reserved']=0 149 return r
150
151 -def decodevessel(bv, validate=False):
152 return aisstring.decode(bv[0:90])
153
154 -def decodedirection(bv, validate=False):
155 return bool(int(bv[90:91]))
156
157 -def decodeETA_month(bv, validate=False):
158 return int(bv[91:95])
159
160 -def decodeETA_day(bv, validate=False):
161 return int(bv[95:100])
162
163 -def decodeETA_hour(bv, validate=False):
164 return int(bv[100:105])
165
166 -def decodeETA_min(bv, validate=False):
167 return int(bv[105:111])
168
169 -def decodereserved(bv, validate=False):
170 return 0
171 172
173 -def printHtml(params, out=sys.stdout):
174 out.write("<h3>sls_lockorder<h3>\n") 175 out.write("<table border=\"1\">\n") 176 out.write("<tr bgcolor=\"orange\">\n") 177 out.write("<th align=\"left\">Field Name</th>\n") 178 out.write("<th align=\"left\">Type</th>\n") 179 out.write("<th align=\"left\">Value</th>\n") 180 out.write("<th align=\"left\">Value in Lookup Table</th>\n") 181 out.write("<th align=\"left\">Units</th>\n") 182 out.write("\n") 183 out.write("<tr>\n") 184 out.write("<td>vessel</td>\n") 185 out.write("<td>aisstr6</td>\n") 186 if 'vessel' in params: 187 out.write(" <td>"+str(params['vessel'])+"</td>\n") 188 out.write(" <td>"+str(params['vessel'])+"</td>\n") 189 out.write("</tr>\n") 190 out.write("\n") 191 out.write("<tr>\n") 192 out.write("<td>direction</td>\n") 193 out.write("<td>bool</td>\n") 194 if 'direction' in params: 195 out.write(" <td>"+str(params['direction'])+"</td>\n") 196 if str(params['direction']) in directionDecodeLut: 197 out.write("<td>"+directionDecodeLut[str(params['direction'])]+"</td>") 198 else: 199 out.write("<td><i>Missing LUT entry</i></td>") 200 out.write("</tr>\n") 201 out.write("\n") 202 out.write("<tr>\n") 203 out.write("<td>ETA_month</td>\n") 204 out.write("<td>uint</td>\n") 205 if 'ETA_month' in params: 206 out.write(" <td>"+str(params['ETA_month'])+"</td>\n") 207 out.write(" <td>"+str(params['ETA_month'])+"</td>\n") 208 out.write("</tr>\n") 209 out.write("\n") 210 out.write("<tr>\n") 211 out.write("<td>ETA_day</td>\n") 212 out.write("<td>uint</td>\n") 213 if 'ETA_day' in params: 214 out.write(" <td>"+str(params['ETA_day'])+"</td>\n") 215 out.write(" <td>"+str(params['ETA_day'])+"</td>\n") 216 out.write("</tr>\n") 217 out.write("\n") 218 out.write("<tr>\n") 219 out.write("<td>ETA_hour</td>\n") 220 out.write("<td>uint</td>\n") 221 if 'ETA_hour' in params: 222 out.write(" <td>"+str(params['ETA_hour'])+"</td>\n") 223 out.write(" <td>"+str(params['ETA_hour'])+"</td>\n") 224 out.write("</tr>\n") 225 out.write("\n") 226 out.write("<tr>\n") 227 out.write("<td>ETA_min</td>\n") 228 out.write("<td>uint</td>\n") 229 if 'ETA_min' in params: 230 out.write(" <td>"+str(params['ETA_min'])+"</td>\n") 231 out.write(" <td>"+str(params['ETA_min'])+"</td>\n") 232 out.write("</tr>\n") 233 out.write("\n") 234 out.write("<tr>\n") 235 out.write("<td>reserved</td>\n") 236 out.write("<td>uint</td>\n") 237 if 'reserved' in params: 238 out.write(" <td>"+str(params['reserved'])+"</td>\n") 239 out.write(" <td>"+str(params['reserved'])+"</td>\n") 240 out.write("</tr>\n") 241 out.write("</table>\n")
242
243 -def printFields(params, out=sys.stdout, format='std', fieldList=None, dbType='postgres'):
244 '''Print a sls_lockorder message to stdout. 245 246 Fields in params: 247 - vessel(aisstr6): Vessel Name 248 - direction(bool): Up bound/Down bound 249 - ETA_month(uint): Estimated time of arrival month 1..12 250 - ETA_day(uint): Estimated time of arrival day of the month 1..31 251 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 252 - ETA_min(uint): Estimated time of arrival minutes 253 - reserved(uint): Reserved bits for future use (field automatically set to "0") 254 @param params: Dictionary of field names/values. 255 @param out: File like object to write to 256 @rtype: stdout 257 @return: text to out 258 ''' 259 260 if 'std'==format: 261 out.write("sls_lockorder:\n") 262 if 'vessel' in params: out.write(" vessel: "+str(params['vessel'])+"\n") 263 if 'direction' in params: out.write(" direction: "+str(params['direction'])+"\n") 264 if 'ETA_month' in params: out.write(" ETA_month: "+str(params['ETA_month'])+"\n") 265 if 'ETA_day' in params: out.write(" ETA_day: "+str(params['ETA_day'])+"\n") 266 if 'ETA_hour' in params: out.write(" ETA_hour: "+str(params['ETA_hour'])+"\n") 267 if 'ETA_min' in params: out.write(" ETA_min: "+str(params['ETA_min'])+"\n") 268 if 'reserved' in params: out.write(" reserved: "+str(params['reserved'])+"\n") 269 elif 'csv'==format: 270 if None == options.fieldList: 271 options.fieldList = fieldList 272 needComma = False; 273 for field in fieldList: 274 if needComma: out.write(',') 275 needComma = True 276 if field in params: 277 out.write(str(params[field])) 278 # else: leave it empty 279 out.write("\n") 280 elif 'html'==format: 281 printHtml(params,out) 282 elif 'sql'==format: 283 sqlInsertStr(params,out,dbType=dbType) 284 else: 285 print "ERROR: unknown format:",format 286 assert False 287 288 return # Nothing to return
289 290 directionEncodeLut = { 291 'Down bound':'0', 292 'Up bound':'1', 293 } #directionEncodeLut 294 295 directionDecodeLut = { 296 '0':'Down bound', 297 '1':'Up bound', 298 } # directionEncodeLut 299 300 ###################################################################### 301 # SQL SUPPORT 302 ###################################################################### 303
304 -def sqlCreateStr(outfile=sys.stdout, fields=None, extraFields=None 305 ,addCoastGuardFields=True 306 ,dbType='postgres' 307 ):
308 ''' 309 Return the SQL CREATE command for this message type 310 @param outfile: file like object to print to. 311 @param fields: which fields to put in the create. Defaults to all. 312 @param extraFields: A sequence of tuples containing (name,sql type) for additional fields 313 @param addCoastGuardFields: Add the extra fields that come after the NMEA check some from the USCG N-AIS format 314 @param dbType: Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres') 315 @type addCoastGuardFields: bool 316 @return: sql create string 317 @rtype: str 318 319 @see: sqlCreate 320 ''' 321 # FIX: should this sqlCreate be the same as in LaTeX (createFuncName) rather than hard coded? 322 outfile.write(str(sqlCreate(fields,extraFields,addCoastGuardFields,dbType=dbType)))
323
324 -def sqlCreate(fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres'):
325 ''' 326 Return the sqlhelp object to create the table. 327 328 @param fields: which fields to put in the create. Defaults to all. 329 @param extraFields: A sequence of tuples containing (name,sql type) for additional fields 330 @param addCoastGuardFields: Add the extra fields that come after the NMEA check some from the USCG N-AIS format 331 @type addCoastGuardFields: bool 332 @param dbType: Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres') 333 @return: An object that can be used to generate a return 334 @rtype: sqlhelp.create 335 ''' 336 if None == fields: fields = fieldList 337 import sqlhelp 338 c = sqlhelp.create('sls_lockorder',dbType=dbType) 339 c.addPrimaryKey() 340 if 'vessel' in fields: c.addVarChar('vessel',15) 341 if 'direction' in fields: c.addBool('direction') 342 if 'ETA_month' in fields: c.addInt ('ETA_month') 343 if 'ETA_day' in fields: c.addInt ('ETA_day') 344 if 'ETA_hour' in fields: c.addInt ('ETA_hour') 345 if 'ETA_min' in fields: c.addInt ('ETA_min') 346 if 'reserved' in fields: c.addInt ('reserved') 347 348 if addCoastGuardFields: 349 # c.addInt('cg_rssi') # Relative signal strength indicator 350 # c.addInt('cg_d') # dBm receive strength 351 # c.addInt('cg_T') # Receive timestamp from the AIS equipment 352 # c.addInt('cg_S') # Slot received in 353 # c.addVarChar('cg_x',10) # Idonno 354 c.addVarChar('cg_r',15) # Receiver station ID - should usually be an MMSI, but sometimes is a string 355 c.addInt('cg_sec') # UTC seconds since the epoch 356 357 c.addTimestamp('cg_timestamp') # UTC decoded cg_sec - not actually in the data stream 358 359 return c
360
361 -def sqlInsertStr(params, outfile=sys.stdout, extraParams=None, dbType='postgres'):
362 ''' 363 Return the SQL INSERT command for this message type 364 @param params: dictionary of values keyed by field name 365 @param outfile: file like object to print to. 366 @param extraParams: A sequence of tuples containing (name,sql type) for additional fields 367 @return: sql create string 368 @rtype: str 369 370 @see: sqlCreate 371 ''' 372 outfile.write(str(sqlInsert(params,extraParams,dbType=dbType)))
373 374
375 -def sqlInsert(params,extraParams=None,dbType='postgres'):
376 ''' 377 Give the SQL INSERT statement 378 @param params: dict keyed by field name of values 379 @param extraParams: any extra fields that you have created beyond the normal ais message fields 380 @rtype: sqlhelp.insert 381 @return: insert class instance 382 @todo: allow optional type checking of params? 383 @warning: this will take invalid keys happily and do what??? 384 ''' 385 import sqlhelp 386 i = sqlhelp.insert('sls_lockorder',dbType=dbType) 387 388 if dbType=='postgres': 389 finished = [] 390 for key in params: 391 if key in finished: 392 continue 393 394 if key not in toPgFields and key not in fromPgFields: 395 if type(params[key])==Decimal: i.add(key,float(params[key])) 396 else: i.add(key,params[key]) 397 else: 398 if key in fromPgFields: 399 val = params[key] 400 # Had better be a WKT type like POINT(-88.1 30.321) 401 i.addPostGIS(key,val) 402 finished.append(key) 403 else: 404 # Need to construct the type. 405 pgName = toPgFields[key] 406 #valStr='GeomFromText(\''+pgTypes[pgName]+'(' 407 valStr=pgTypes[pgName]+'(' 408 vals = [] 409 for nonPgKey in fromPgFields[pgName]: 410 vals.append(str(params[nonPgKey])) 411 finished.append(nonPgKey) 412 valStr+=' '.join(vals)+')' 413 i.addPostGIS(pgName,valStr) 414 else: 415 for key in params: 416 if type(params[key])==Decimal: i.add(key,float(params[key])) 417 else: i.add(key,params[key]) 418 419 if None != extraParams: 420 for key in extraParams: 421 i.add(key,extraParams[key]) 422 423 return i
424 ###################################################################### 425 # LATEX SUPPORT 426 ###################################################################### 427
428 -def latexDefinitionTable(outfile=sys.stdout 429 ):
430 ''' 431 Return the LaTeX definition table for this message type 432 @param outfile: file like object to print to. 433 @param fields: which fields to put in the create. Defaults to all. 434 @return: LaTeX table string 435 @rtype: str 436 437 ''' 438 o = outfile 439 440 o.write(''' 441 \\begin{table}%[htb] 442 \\centering 443 \\begin{tabular}{|l|c|l|} 444 \\hline 445 Parameter & Number of bits & Description 446 \\\\ \\hline\\hline 447 vessel & 90 & Vessel Name \\\\ \hline 448 direction & 1 & Up bound/Down bound \\\\ \hline 449 ETA\_month & 4 & Estimated time of arrival month 1..12 \\\\ \hline 450 ETA\_day & 5 & Estimated time of arrival day of the month 1..31 \\\\ \hline 451 ETA\_hour & 5 & Estimated time of arrival UTC hours 0..23 \\\\ \hline 452 ETA\_min & 6 & Estimated time of arrival minutes \\\\ \hline 453 reserved & 19 & Reserved bits for future use\\\\ \\hline \\hline 454 Total bits & 130 & Appears to take 1 slots with 38 pad bits to fill the last slot \\\\ \\hline 455 \\end{tabular} 456 \\caption{AIS message number 8: St Lawrance Seaway wind information} 457 \\label{tab:sls_lockorder} 458 \\end{table} 459 ''')
460 461 462 ###################################################################### 463 # UNIT TESTING 464 ###################################################################### 465 import unittest
466 -def testParams():
467 '''Return a params file base on the testvalue tags. 468 @rtype: dict 469 @return: params based on testvalue tags 470 ''' 471 params = {} 472 params['vessel'] = 'ICEBERG@@@@@@@@' 473 params['direction'] = True 474 params['ETA_month'] = 2 475 params['ETA_day'] = 28 476 params['ETA_hour'] = 23 477 params['ETA_min'] = 45 478 params['reserved'] = 0 479 480 return params
481
482 -class Testsls_lockorder(unittest.TestCase):
483 '''Use testvalue tag text from each type to build test case the sls_lockorder message'''
484 - def testEncodeDecode(self):
485 486 params = testParams() 487 bits = encode(params) 488 r = decode(bits) 489 490 # Check that each parameter came through ok. 491 self.failUnlessEqual(r['vessel'],params['vessel']) 492 self.failUnlessEqual(r['direction'],params['direction']) 493 self.failUnlessEqual(r['ETA_month'],params['ETA_month']) 494 self.failUnlessEqual(r['ETA_day'],params['ETA_day']) 495 self.failUnlessEqual(r['ETA_hour'],params['ETA_hour']) 496 self.failUnlessEqual(r['ETA_min'],params['ETA_min']) 497 self.failUnlessEqual(r['reserved'],params['reserved'])
498
499 -def addMsgOptions(parser):
500 parser.add_option('-d','--decode',dest='doDecode',default=False,action='store_true', 501 help='decode a "sls_lockorder" AIS message') 502 parser.add_option('-e','--encode',dest='doEncode',default=False,action='store_true', 503 help='encode a "sls_lockorder" AIS message') 504 parser.add_option('--vessel-field', dest='vesselField',default='@@@@@@@@@@@@@@@',metavar='aisstr6',type='string' 505 ,help='Field parameter value [default: %default]') 506 parser.add_option('--direction-field', dest='directionField',metavar='bool',type='int' 507 ,help='Field parameter value [default: %default]') 508 parser.add_option('--ETA_month-field', dest='ETA_monthField',metavar='uint',type='int' 509 ,help='Field parameter value [default: %default]') 510 parser.add_option('--ETA_day-field', dest='ETA_dayField',metavar='uint',type='int' 511 ,help='Field parameter value [default: %default]') 512 parser.add_option('--ETA_hour-field', dest='ETA_hourField',metavar='uint',type='int' 513 ,help='Field parameter value [default: %default]') 514 parser.add_option('--ETA_min-field', dest='ETA_minField',metavar='uint',type='int' 515 ,help='Field parameter value [default: %default]')
516 517 ############################################################ 518 if __name__=='__main__': 519 520 from optparse import OptionParser 521 parser = OptionParser(usage="%prog [options]", 522 version="%prog "+__version__) 523 524 parser.add_option('--doc-test',dest='doctest',default=False,action='store_true', 525 help='run the documentation tests') 526 parser.add_option('--unit-test',dest='unittest',default=False,action='store_true', 527 help='run the unit tests') 528 parser.add_option('-v','--verbose',dest='verbose',default=False,action='store_true', 529 help='Make the test output verbose') 530 531 # FIX: remove nmea from binary messages. No way to build the whole packet? 532 # FIX: or build the surrounding msg 8 for a broadcast? 533 typeChoices = ('binary','nmeapayload','nmea') # FIX: what about a USCG type message? 534 parser.add_option('-t','--type',choices=typeChoices,type='choice',dest='ioType' 535 ,default='nmeapayload' 536 ,help='What kind of string to write for encoding ('+', '.join(typeChoices)+') [default: %default]') 537 538 539 outputChoices = ('std','html','csv','sql' ) 540 parser.add_option('-T','--output-type',choices=outputChoices,type='choice',dest='outputType' 541 ,default='std' 542 ,help='What kind of string to output ('+', '.join(outputChoices)+') [default: %default]') 543 544 parser.add_option('-o','--output',dest='outputFileName',default=None, 545 help='Name of the python file to write [default: stdout]') 546 547 parser.add_option('-f','--fields',dest='fieldList',default=None, action='append', 548 choices=fieldList, 549 help='Which fields to include in the output. Currently only for csv output [default: all]') 550 551 parser.add_option('-p','--print-csv-field-list',dest='printCsvfieldList',default=False,action='store_true', 552 help='Print the field name for csv') 553 554 parser.add_option('-c','--sql-create',dest='sqlCreate',default=False,action='store_true', 555 help='Print out an sql create command for the table.') 556 557 parser.add_option('--latex-table',dest='latexDefinitionTable',default=False,action='store_true', 558 help='Print a LaTeX table of the type') 559 560 dbChoices = ('sqlite','postgres') 561 parser.add_option('-D','--db-type',dest='dbType',default='postgres' 562 ,choices=dbChoices,type='choice' 563 ,help='What kind of database ('+', '.join(dbChoices)+') [default: %default]') 564 565 addMsgOptions(parser) 566 567 (options,args) = parser.parse_args() 568 success=True 569 570 if options.doctest: 571 import os; print os.path.basename(sys.argv[0]), 'doctests ...', 572 sys.argv= [sys.argv[0]] 573 if options.verbose: sys.argv.append('-v') 574 import doctest 575 numfail,numtests=doctest.testmod() 576 if numfail==0: print 'ok' 577 else: 578 print 'FAILED' 579 success=False 580 581 if not success: sys.exit('Something Failed') 582 del success # Hide success from epydoc 583 584 if options.unittest: 585 sys.argv = [sys.argv[0]] 586 if options.verbose: sys.argv.append('-v') 587 unittest.main() 588 589 outfile = sys.stdout 590 if None!=options.outputFileName: 591 outfile = file(options.outputFileName,'w') 592 593 594 if options.doEncode: 595 # First make sure all non required options are specified 596 if None==options.vesselField: parser.error("missing value for vesselField") 597 if None==options.directionField: parser.error("missing value for directionField") 598 if None==options.ETA_monthField: parser.error("missing value for ETA_monthField") 599 if None==options.ETA_dayField: parser.error("missing value for ETA_dayField") 600 if None==options.ETA_hourField: parser.error("missing value for ETA_hourField") 601 if None==options.ETA_minField: parser.error("missing value for ETA_minField") 602 msgDict={ 603 'vessel': options.vesselField, 604 'direction': options.directionField, 605 'ETA_month': options.ETA_monthField, 606 'ETA_day': options.ETA_dayField, 607 'ETA_hour': options.ETA_hourField, 608 'ETA_min': options.ETA_minField, 609 'reserved': '0', 610 } 611 612 bits = encode(msgDict) 613 if 'binary'==options.ioType: print str(bits) 614 elif 'nmeapayload'==options.ioType: 615 # FIX: figure out if this might be necessary at compile time 616 print "bitLen",len(bits) 617 bitLen=len(bits) 618 if bitLen%6!=0: 619 bits = bits + BitVector(size=(6 - (bitLen%6))) # Pad out to multiple of 6 620 print "result:",binary.bitvectoais6(bits)[0] 621 622 623 # FIX: Do not emit this option for the binary message payloads. Does not make sense. 624 elif 'nmea'==options.ioType: sys.exit("FIX: need to implement this capability") 625 else: sys.exit('ERROR: unknown ioType. Help!') 626 627 628 if options.sqlCreate: 629 sqlCreateStr(outfile,options.fieldList,dbType=options.dbType) 630 631 if options.latexDefinitionTable: 632 latexDefinitionTable(outfile) 633 634 if options.printCsvfieldList: 635 # Make a csv separated list of fields that will be displayed for csv 636 if None == options.fieldList: options.fieldList = fieldList 637 import StringIO 638 buf = StringIO.StringIO() 639 for field in options.fieldList: 640 buf.write(field+',') 641 result = buf.getvalue() 642 if result[-1] == ',': print result[:-1] 643 else: print result 644 645 if options.doDecode: 646 for msg in args: 647 bv = None 648 649 if msg[0] in ('$','!') and msg[3:6] in ('VDM','VDO'): 650 # Found nmea 651 # FIX: do checksum 652 bv = binary.ais6tobitvec(msg.split(',')[5]) 653 else: # either binary or nmeapayload... expect mostly nmeapayloads 654 # assumes that an all 0 and 1 string can not be a nmeapayload 655 binaryMsg=True 656 for c in msg: 657 if c not in ('0','1'): 658 binaryMsg=False 659 break 660 if binaryMsg: 661 bv = BitVector(bitstring=msg) 662 else: # nmeapayload 663 bv = binary.ais6tobitvec(msg) 664 665 printFields(decode(bv) 666 ,out=outfile 667 ,format=options.outputType 668 ,fieldList=options.fieldList 669 ,dbType=options.dbType 670 ) 671