Package ais :: Module sls_wind
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Source Code for Module ais.sls_wind

  1  #!/usr/bin/env python 
  2   
  3  __version__ = '$Revision: 4791 $'.split()[1] 
  4  __date__ = '$Date: 2007-01-18 $'.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  ''' 
 34   
 35  import sys 
 36  from decimal import Decimal 
 37  from BitVector import BitVector 
 38   
 39  import binary, aisstring 
 40   
 41  # FIX: check to see if these will be needed 
 42  TrueBV  = BitVector(bitstring="1") 
 43  "Why always rebuild the True bit?  This should speed things up a bunch" 
 44  FalseBV = BitVector(bitstring="0") 
 45  "Why always rebuild the False bit?  This should speed things up a bunch" 
 46   
 47   
48 -def encode(params, validate=False):
49 '''Create a sls_wind binary message payload to pack into an AIS Msg sls_wind. 50 51 Fields in params: 52 - time_month(uint): Time tag of measurement month 1..12 53 - time_day(uint): Time tag of measurement day of the month 1..31 54 - time_hour(uint): Time tag of measurement UTC hours 0..23 55 - time_min(uint): Time tag of measurement minutes 56 - stationid(aisstr6): Character identifier of the station 57 - pos_longitude(decimal): Location of measurement East West location 58 - pos_latitude(decimal): Location of measurement North South location 59 - speed(udecimal): Average wind speed 60 - gust(udecimal): Wind gust 61 - direction(uint): Wind direction 62 - reserved(uint): Reserved bits for future use (field automatically set to "0") 63 @param params: Dictionary of field names/values. Throws a ValueError exception if required is missing 64 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 65 @rtype: BitVector 66 @return: encoded binary message (for binary messages, this needs to be wrapped in a msg 8 67 @note: The returned bits may not be 6 bit aligned. It is up to you to pad out the bits. 68 ''' 69 70 bvList = [] 71 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['time_month']),4)) 72 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['time_day']),5)) 73 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['time_hour']),5)) 74 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['time_min']),6)) 75 if 'stationid' in params: 76 bvList.append(aisstring.encode(params['stationid'],42)) 77 else: 78 bvList.append(aisstring.encode('@@@@@@@',42)) 79 if 'pos_longitude' in params: 80 bvList.append(binary.bvFromSignedInt(int(Decimal(params['pos_longitude'])*Decimal('60000')),25)) 81 else: 82 bvList.append(binary.bvFromSignedInt(10860000,25)) 83 if 'pos_latitude' in params: 84 bvList.append(binary.bvFromSignedInt(int(Decimal(params['pos_latitude'])*Decimal('60000')),24)) 85 else: 86 bvList.append(binary.bvFromSignedInt(5460000,24)) 87 if 'speed' in params: 88 bvList.append(binary.setBitVectorSize(BitVector(intVal=int((Decimal(params['speed'])*Decimal('10')))),10)) 89 else: 90 bvList.append(binary.setBitVectorSize(BitVector(intVal=int(1023)),10)) 91 if 'gust' in params: 92 bvList.append(binary.setBitVectorSize(BitVector(intVal=int((Decimal(params['gust'])*Decimal('10')))),10)) 93 else: 94 bvList.append(binary.setBitVectorSize(BitVector(intVal=int(1023)),10)) 95 if 'direction' in params: 96 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['direction']),9)) 97 else: 98 bvList.append(binary.setBitVectorSize(BitVector(intVal=511),9)) 99 bvList.append(binary.setBitVectorSize(BitVector(intVal=0),4)) 100 101 return binary.joinBV(bvList)
102
103 -def decode(bv, validate=False):
104 '''Unpack a sls_wind message 105 106 Fields in params: 107 - time_month(uint): Time tag of measurement month 1..12 108 - time_day(uint): Time tag of measurement day of the month 1..31 109 - time_hour(uint): Time tag of measurement UTC hours 0..23 110 - time_min(uint): Time tag of measurement minutes 111 - stationid(aisstr6): Character identifier of the station 112 - pos_longitude(decimal): Location of measurement East West location 113 - pos_latitude(decimal): Location of measurement North South location 114 - speed(udecimal): Average wind speed 115 - gust(udecimal): Wind gust 116 - direction(uint): Wind direction 117 - reserved(uint): Reserved bits for future use (field automatically set to "0") 118 @type bv: BitVector 119 @param bv: Bits defining a message 120 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 121 @rtype: dict 122 @return: params 123 ''' 124 125 #Would be nice to check the bit count here.. 126 #if validate: 127 # assert (len(bv)==FIX: SOME NUMBER) 128 r = {} 129 r['time_month']=int(bv[0:4]) 130 r['time_day']=int(bv[4:9]) 131 r['time_hour']=int(bv[9:14]) 132 r['time_min']=int(bv[14:20]) 133 r['stationid']=aisstring.decode(bv[20:62]) 134 r['pos_longitude']=Decimal(binary.signedIntFromBV(bv[62:87]))/Decimal('60000') 135 r['pos_latitude']=Decimal(binary.signedIntFromBV(bv[87:111]))/Decimal('60000') 136 r['speed']=Decimal(int(bv[111:121]))/Decimal('10') 137 r['gust']=Decimal(int(bv[121:131]))/Decimal('10') 138 r['direction']=int(bv[131:140]) 139 r['reserved']=0 140 return r
141
142 -def decodetime_month(bv, validate=False):
143 return int(bv[0:4])
144
145 -def decodetime_day(bv, validate=False):
146 return int(bv[4:9])
147
148 -def decodetime_hour(bv, validate=False):
149 return int(bv[9:14])
150
151 -def decodetime_min(bv, validate=False):
152 return int(bv[14:20])
153
154 -def decodestationid(bv, validate=False):
155 return aisstring.decode(bv[20:62])
156
157 -def decodepos_longitude(bv, validate=False):
158 return Decimal(binary.signedIntFromBV(bv[62:87]))/Decimal('60000')
159
160 -def decodepos_latitude(bv, validate=False):
161 return Decimal(binary.signedIntFromBV(bv[87:111]))/Decimal('60000')
162
163 -def decodespeed(bv, validate=False):
164 return Decimal(int(bv[111:121]))/Decimal('10')
165
166 -def decodegust(bv, validate=False):
167 return Decimal(int(bv[121:131]))/Decimal('10')
168
169 -def decodedirection(bv, validate=False):
170 return int(bv[131:140])
171
172 -def decodereserved(bv, validate=False):
173 return 0
174 175
176 -def printHtml(params, out=sys.stdout):
177 out.write("<h3>sls_wind<h3>\n") 178 out.write("<table border=\"1\">\n") 179 out.write("<tr bgcolor=\"orange\">\n") 180 out.write("<th align=\"left\">Field Name</th>\n") 181 out.write("<th align=\"left\">Type</th>\n") 182 out.write("<th align=\"left\">Value</th>\n") 183 out.write("<th align=\"left\">Value in Lookup Table</th>\n") 184 out.write("<th align=\"left\">Units</th>\n") 185 out.write("\n") 186 out.write("<tr>\n") 187 out.write("<td>time_month</td>\n") 188 out.write("<td>uint</td>\n") 189 if 'time_month' in params: 190 out.write(" <td>"+str(params['time_month'])+"</td>\n") 191 out.write(" <td>"+str(params['time_month'])+"</td>\n") 192 out.write("</tr>\n") 193 out.write("\n") 194 out.write("<tr>\n") 195 out.write("<td>time_day</td>\n") 196 out.write("<td>uint</td>\n") 197 if 'time_day' in params: 198 out.write(" <td>"+str(params['time_day'])+"</td>\n") 199 out.write(" <td>"+str(params['time_day'])+"</td>\n") 200 out.write("</tr>\n") 201 out.write("\n") 202 out.write("<tr>\n") 203 out.write("<td>time_hour</td>\n") 204 out.write("<td>uint</td>\n") 205 if 'time_hour' in params: 206 out.write(" <td>"+str(params['time_hour'])+"</td>\n") 207 out.write(" <td>"+str(params['time_hour'])+"</td>\n") 208 out.write("</tr>\n") 209 out.write("\n") 210 out.write("<tr>\n") 211 out.write("<td>time_min</td>\n") 212 out.write("<td>uint</td>\n") 213 if 'time_min' in params: 214 out.write(" <td>"+str(params['time_min'])+"</td>\n") 215 out.write(" <td>"+str(params['time_min'])+"</td>\n") 216 out.write("</tr>\n") 217 out.write("\n") 218 out.write("<tr>\n") 219 out.write("<td>stationid</td>\n") 220 out.write("<td>aisstr6</td>\n") 221 if 'stationid' in params: 222 out.write(" <td>"+str(params['stationid'])+"</td>\n") 223 out.write(" <td>"+str(params['stationid'])+"</td>\n") 224 out.write("</tr>\n") 225 out.write("\n") 226 out.write("<tr>\n") 227 out.write("<td>pos_longitude</td>\n") 228 out.write("<td>decimal</td>\n") 229 if 'pos_longitude' in params: 230 out.write(" <td>"+str(params['pos_longitude'])+"</td>\n") 231 out.write(" <td>"+str(params['pos_longitude'])+"</td>\n") 232 out.write("<td>degrees</td>\n") 233 out.write("</tr>\n") 234 out.write("\n") 235 out.write("<tr>\n") 236 out.write("<td>pos_latitude</td>\n") 237 out.write("<td>decimal</td>\n") 238 if 'pos_latitude' in params: 239 out.write(" <td>"+str(params['pos_latitude'])+"</td>\n") 240 out.write(" <td>"+str(params['pos_latitude'])+"</td>\n") 241 out.write("<td>degrees</td>\n") 242 out.write("</tr>\n") 243 out.write("\n") 244 out.write("<tr>\n") 245 out.write("<td>speed</td>\n") 246 out.write("<td>udecimal</td>\n") 247 if 'speed' in params: 248 out.write(" <td>"+str(params['speed'])+"</td>\n") 249 if str(params['speed']) in speedDecodeLut: 250 out.write("<td>"+speedDecodeLut[str(params['speed'])]+"</td>") 251 else: 252 out.write("<td><i>Missing LUT entry</i></td>") 253 out.write("<td>kts</td>\n") 254 out.write("</tr>\n") 255 out.write("\n") 256 out.write("<tr>\n") 257 out.write("<td>gust</td>\n") 258 out.write("<td>udecimal</td>\n") 259 if 'gust' in params: 260 out.write(" <td>"+str(params['gust'])+"</td>\n") 261 if str(params['gust']) in gustDecodeLut: 262 out.write("<td>"+gustDecodeLut[str(params['gust'])]+"</td>") 263 else: 264 out.write("<td><i>Missing LUT entry</i></td>") 265 out.write("<td>kts</td>\n") 266 out.write("</tr>\n") 267 out.write("\n") 268 out.write("<tr>\n") 269 out.write("<td>direction</td>\n") 270 out.write("<td>uint</td>\n") 271 if 'direction' in params: 272 out.write(" <td>"+str(params['direction'])+"</td>\n") 273 out.write(" <td>"+str(params['direction'])+"</td>\n") 274 out.write("<td>degrees</td>\n") 275 out.write("</tr>\n") 276 out.write("\n") 277 out.write("<tr>\n") 278 out.write("<td>reserved</td>\n") 279 out.write("<td>uint</td>\n") 280 if 'reserved' in params: 281 out.write(" <td>"+str(params['reserved'])+"</td>\n") 282 out.write(" <td>"+str(params['reserved'])+"</td>\n") 283 out.write("</tr>\n") 284 out.write("</table>\n")
285
286 -def printKml(params, out=sys.stdout):
287 '''KML (Keyhole Markup Language) for Google Earth, but without the header/footer''' 288 out.write("\ <Placemark>\n") 289 out.write("\t <name>"+str(params['stationid'])+"</name>\n") 290 out.write("\t\t<description>\n") 291 import StringIO 292 buf = StringIO.StringIO() 293 printHtml(params,buf) 294 import cgi 295 out.write(cgi.escape(buf.getvalue())) 296 out.write("\t\t</description>\n") 297 out.write("\t\t<styleUrl>#m_ylw-pushpin_copy0</styleUrl>\n") 298 out.write("\t\t<Point>\n") 299 out.write("\t\t\t<coordinates>") 300 out.write(str(params['pos_longitude'])) 301 out.write(',') 302 out.write(str(params['pos_latitude'])) 303 out.write(",0</coordinates>\n") 304 out.write("\t\t</Point>\n") 305 out.write("\t</Placemark>\n")
306
307 -def printFields(params, out=sys.stdout, format='std'):
308 '''Print a reserved message to stdout. 309 310 Fields in params: 311 - time_month(uint): Time tag of measurement month 1..12 312 - time_day(uint): Time tag of measurement day of the month 1..31 313 - time_hour(uint): Time tag of measurement UTC hours 0..23 314 - time_min(uint): Time tag of measurement minutes 315 - stationid(aisstr6): Character identifier of the station 316 - pos_longitude(decimal): Location of measurement East West location 317 - pos_latitude(decimal): Location of measurement North South location 318 - speed(udecimal): Average wind speed 319 - gust(udecimal): Wind gust 320 - direction(uint): Wind direction 321 - reserved(uint): Reserved bits for future use (field automatically set to "0") 322 @param params: Dictionary of field names/values. 323 @param out: File like object to write to 324 @rtype: stdout 325 @return: text to out 326 ''' 327 328 if 'std'==format: 329 out.write("reserved:\n") 330 if 'time_month' in params: out.write(" time_month: "+str(params['time_month'])+"\n") 331 if 'time_day' in params: out.write(" time_day: "+str(params['time_day'])+"\n") 332 if 'time_hour' in params: out.write(" time_hour: "+str(params['time_hour'])+"\n") 333 if 'time_min' in params: out.write(" time_min: "+str(params['time_min'])+"\n") 334 if 'stationid' in params: out.write(" stationid: "+str(params['stationid'])+"\n") 335 if 'pos_longitude' in params: out.write(" pos_longitude: "+str(params['pos_longitude'])+"\n") 336 if 'pos_latitude' in params: out.write(" pos_latitude: "+str(params['pos_latitude'])+"\n") 337 if 'speed' in params: out.write(" speed: "+str(params['speed'])+"\n") 338 if 'gust' in params: out.write(" gust: "+str(params['gust'])+"\n") 339 if 'direction' in params: out.write(" direction: "+str(params['direction'])+"\n") 340 if 'reserved' in params: out.write(" reserved: "+str(params['reserved'])+"\n") 341 elif 'html'==format: 342 printHtml(params,out) 343 elif 'kml'==format: 344 printKml(params,out) 345 elif 'kml-full'==format: 346 out.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n") 347 out.write("<kml xmlns=\"http://earth.google.com/kml/2.1\">\n") 348 out.write("<Document>\n") 349 out.write(" <name>Position</name>\n") 350 printKml(params,out) 351 out.write("</Document>\n") 352 out.write("</kml>\n") 353 else: 354 print "ERROR: unknown format:",format 355 assert False 356 357 return # Nothing to return
358 359 speedEncodeLut = { 360 '102.2 kts or greater':'102.2', 361 } #speedEncodeLut 362 363 speedDecodeLut = { 364 '102.2':'102.2 kts or greater', 365 } # speedEncodeLut 366 367 gustEncodeLut = { 368 '102.2 kts or greater':'102.2', 369 } #gustEncodeLut 370 371 gustDecodeLut = { 372 '102.2':'102.2 kts or greater', 373 } # gustEncodeLut 374 375 376 377 ###################################################################### 378 # UNIT TESTING 379 ###################################################################### 380 import unittest
381 -def testParams():
382 '''Return a params file base on the testvalue tags. 383 @rtype: dict 384 @return: params based on testvalue tags 385 ''' 386 params = {} 387 params['time_month'] = 2 388 params['time_day'] = 28 389 params['time_hour'] = 23 390 params['time_min'] = 45 391 params['stationid'] = 'A345678' 392 params['pos_longitude'] = Decimal('-122.16328') 393 params['pos_latitude'] = Decimal('37.42446') 394 params['speed'] = Decimal('0.7') 395 params['gust'] = Decimal('0.7') 396 params['direction'] = 90 397 params['reserved'] = 0 398 399 return params
400
401 -class Testsls_wind(unittest.TestCase):
402 '''Use testvalue tag text from each type to build test case the sls_wind message'''
403 - def testEncodeDecode(self):
404 405 params = testParams() 406 bits = encode(params) 407 r = decode(bits) 408 409 # Check that each parameter came through ok. 410 self.failUnlessEqual(r['time_month'],params['time_month']) 411 self.failUnlessEqual(r['time_day'],params['time_day']) 412 self.failUnlessEqual(r['time_hour'],params['time_hour']) 413 self.failUnlessEqual(r['time_min'],params['time_min']) 414 self.failUnlessEqual(r['stationid'],params['stationid']) 415 self.failUnlessAlmostEqual(r['pos_longitude'],params['pos_longitude'],4) 416 self.failUnlessAlmostEqual(r['pos_latitude'],params['pos_latitude'],4) 417 self.failUnlessAlmostEqual(r['speed'],params['speed'],3) 418 self.failUnlessAlmostEqual(r['gust'],params['gust'],3) 419 self.failUnlessEqual(r['direction'],params['direction']) 420 self.failUnlessEqual(r['reserved'],params['reserved'])
421
422 -def addMsgOptions(parser):
423 parser.add_option('-d','--decode',dest='doDecode',default=False,action='store_true', 424 help='decode a "sls_wind" AIS message') 425 parser.add_option('-e','--encode',dest='doEncode',default=False,action='store_true', 426 help='encode a "sls_wind" AIS message') 427 parser.add_option('--time_month-field', dest='time_monthField',metavar='uint',type='int' 428 ,help='Field parameter value [default: %default]') 429 parser.add_option('--time_day-field', dest='time_dayField',metavar='uint',type='int' 430 ,help='Field parameter value [default: %default]') 431 parser.add_option('--time_hour-field', dest='time_hourField',metavar='uint',type='int' 432 ,help='Field parameter value [default: %default]') 433 parser.add_option('--time_min-field', dest='time_minField',metavar='uint',type='int' 434 ,help='Field parameter value [default: %default]') 435 parser.add_option('--stationid-field', dest='stationidField',default='@@@@@@@',metavar='aisstr6',type='string' 436 ,help='Field parameter value [default: %default]') 437 parser.add_option('--pos_longitude-field', dest='pos_longitudeField',default=Decimal('181'),metavar='decimal',type='string' 438 ,help='Field parameter value [default: %default]') 439 parser.add_option('--pos_latitude-field', dest='pos_latitudeField',default=Decimal('91'),metavar='decimal',type='string' 440 ,help='Field parameter value [default: %default]') 441 parser.add_option('--speed-field', dest='speedField',default=Decimal('102.3'),metavar='udecimal',type='string' 442 ,help='Field parameter value [default: %default]') 443 parser.add_option('--gust-field', dest='gustField',default=Decimal('102.3'),metavar='udecimal',type='string' 444 ,help='Field parameter value [default: %default]') 445 parser.add_option('--direction-field', dest='directionField',default=511,metavar='uint',type='int' 446 ,help='Field parameter value [default: %default]')
447 448 ############################################################ 449 if __name__=='__main__': 450 451 from optparse import OptionParser 452 parser = OptionParser(usage="%prog [options]", 453 version="%prog "+__version__) 454 455 parser.add_option('--doc-test',dest='doctest',default=False,action='store_true', 456 help='run the documentation tests') 457 parser.add_option('--unit-test',dest='unittest',default=False,action='store_true', 458 help='run the unit tests') 459 parser.add_option('-v','--verbose',dest='verbose',default=False,action='store_true', 460 help='Make the test output verbose') 461 462 # FIX: remove nmea from binary messages. No way to build the whole packet? 463 # FIX: or build the surrounding msg 8 for a broadcast? 464 typeChoices = ('binary','nmeapayload','nmea') # FIX: what about a USCG type message? 465 parser.add_option('-t','--type',choices=typeChoices,type='choice',dest='ioType' 466 ,default='nmeapayload' 467 ,help='What kind of string to expect ('+', '.join(typeChoices)+') [default: %default]') 468 469 470 outputChoices = ('std','html','xml' , 'kml','kml-full') 471 parser.add_option('-T','--output-type',choices=outputChoices,type='choice',dest='outputType' 472 ,default='std' 473 ,help='What kind of string to output ('+', '.join(outputChoices)+') [default: %default]') 474 475 parser.add_option('-o','--output',dest='outputFileName',default=None, 476 help='Name of the python file to write [default: stdout]') 477 478 addMsgOptions(parser) 479 480 (options,args) = parser.parse_args() 481 success=True 482 483 if options.doctest: 484 import os; print os.path.basename(sys.argv[0]), 'doctests ...', 485 sys.argv= [sys.argv[0]] 486 if options.verbose: sys.argv.append('-v') 487 import doctest 488 numfail,numtests=doctest.testmod() 489 if numfail==0: print 'ok' 490 else: 491 print 'FAILED' 492 success=False 493 494 if not success: sys.exit('Something Failed') 495 del success # Hide success from epydoc 496 497 if options.unittest: 498 sys.argv = [sys.argv[0]] 499 if options.verbose: sys.argv.append('-v') 500 unittest.main() 501 502 outfile = sys.stdout 503 if None!=options.outputFileName: 504 outfile = file(options.outputFileName,'w') 505 506 507 if options.doEncode: 508 # First make sure all non required options are specified 509 if None==options.time_monthField: parser.error("missing value for time_monthField") 510 if None==options.time_dayField: parser.error("missing value for time_dayField") 511 if None==options.time_hourField: parser.error("missing value for time_hourField") 512 if None==options.time_minField: parser.error("missing value for time_minField") 513 if None==options.stationidField: parser.error("missing value for stationidField") 514 if None==options.pos_longitudeField: parser.error("missing value for pos_longitudeField") 515 if None==options.pos_latitudeField: parser.error("missing value for pos_latitudeField") 516 if None==options.speedField: parser.error("missing value for speedField") 517 if None==options.gustField: parser.error("missing value for gustField") 518 if None==options.directionField: parser.error("missing value for directionField") 519 msgDict={ 520 'time_month': options.time_monthField, 521 'time_day': options.time_dayField, 522 'time_hour': options.time_hourField, 523 'time_min': options.time_minField, 524 'stationid': options.stationidField, 525 'pos_longitude': options.pos_longitudeField, 526 'pos_latitude': options.pos_latitudeField, 527 'speed': options.speedField, 528 'gust': options.gustField, 529 'direction': options.directionField, 530 'reserved': '0', 531 } 532 533 bits = encode(msgDict) 534 if 'binary'==options.ioType: print str(bits) 535 elif 'nmeapayload'==options.ioType: 536 # FIX: figure out if this might be necessary at compile time 537 print "bitLen",len(bits) 538 bitLen=len(bits) 539 if bitLen%6!=0: 540 bits = bits + BitVector(size=(6 - (bitLen%6))) # Pad out to multiple of 6 541 print "result:",binary.bitvectoais6(bits)[0] 542 543 544 # FIX: Do not emit this option for the binary message payloads. Does not make sense. 545 elif 'nmea'==options.ioType: sys.exit("FIX: need to implement this capability") 546 else: sys.exit('ERROR: unknown ioType. Help!') 547 548 if options.doDecode: 549 for msg in args: 550 bv = None 551 if 'binary' == options.ioType: bv = BitVector(bitstring=msg) 552 elif 'nmeapayload'== options.ioType: bv = binary.ais6tobitvec(msg) 553 elif 'nmea' == options.ioType: bv = binary.ais6tobitvec(msg.split(',')[5]) 554 else: sys.exit('ERROR: unknown ioType. Help!') 555 556 printFields(decode(bv),out=outfile,format=options.outputType) 557