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

  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  fieldList = [ 
 49          'vessel', 
 50          'direction', 
 51          'ETA_month', 
 52          'ETA_day', 
 53          'ETA_hour', 
 54          'ETA_min', 
 55          'reserved', 
 56  ] 
 57   
58 -def encode(params, validate=False):
59 '''Create a sls_lockorder binary message payload to pack into an AIS Msg sls_lockorder. 60 61 Fields in params: 62 - vessel(aisstr6): Vessel Name 63 - direction(bool): Up bound/Down bound 64 - ETA_month(uint): Estimated time of arrival month 1..12 65 - ETA_day(uint): Estimated time of arrival day of the month 1..31 66 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 67 - ETA_min(uint): Estimated time of arrival minutes 68 - reserved(uint): Reserved bits for future use (field automatically set to "0") 69 @param params: Dictionary of field names/values. Throws a ValueError exception if required is missing 70 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 71 @rtype: BitVector 72 @return: encoded binary message (for binary messages, this needs to be wrapped in a msg 8 73 @note: The returned bits may not be 6 bit aligned. It is up to you to pad out the bits. 74 ''' 75 76 bvList = [] 77 if 'vessel' in params: 78 bvList.append(aisstring.encode(params['vessel'],90)) 79 else: 80 bvList.append(aisstring.encode('@@@@@@@@@@@@@@@',90)) 81 if params["direction"]: bvList.append(TrueBV) 82 else: bvList.append(FalseBV) 83 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_month']),4)) 84 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_day']),5)) 85 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_hour']),5)) 86 bvList.append(binary.setBitVectorSize(BitVector(intVal=params['ETA_min']),6)) 87 bvList.append(binary.setBitVectorSize(BitVector(intVal=0),19)) 88 89 return binary.joinBV(bvList)
90
91 -def decode(bv, validate=False):
92 '''Unpack a sls_lockorder message 93 94 Fields in params: 95 - vessel(aisstr6): Vessel Name 96 - direction(bool): Up bound/Down bound 97 - ETA_month(uint): Estimated time of arrival month 1..12 98 - ETA_day(uint): Estimated time of arrival day of the month 1..31 99 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 100 - ETA_min(uint): Estimated time of arrival minutes 101 - reserved(uint): Reserved bits for future use (field automatically set to "0") 102 @type bv: BitVector 103 @param bv: Bits defining a message 104 @param validate: Set to true to cause checking to occur. Runs slower. FIX: not implemented. 105 @rtype: dict 106 @return: params 107 ''' 108 109 #Would be nice to check the bit count here.. 110 #if validate: 111 # assert (len(bv)==FIX: SOME NUMBER) 112 r = {} 113 r['vessel']=aisstring.decode(bv[0:90]) 114 r['direction']=bool(int(bv[90:91])) 115 r['ETA_month']=int(bv[91:95]) 116 r['ETA_day']=int(bv[95:100]) 117 r['ETA_hour']=int(bv[100:105]) 118 r['ETA_min']=int(bv[105:111]) 119 r['reserved']=0 120 return r
121
122 -def decodevessel(bv, validate=False):
123 return aisstring.decode(bv[0:90])
124
125 -def decodedirection(bv, validate=False):
126 return bool(int(bv[90:91]))
127
128 -def decodeETA_month(bv, validate=False):
129 return int(bv[91:95])
130
131 -def decodeETA_day(bv, validate=False):
132 return int(bv[95:100])
133
134 -def decodeETA_hour(bv, validate=False):
135 return int(bv[100:105])
136
137 -def decodeETA_min(bv, validate=False):
138 return int(bv[105:111])
139
140 -def decodereserved(bv, validate=False):
141 return 0
142 143
144 -def printHtml(params, out=sys.stdout):
145 out.write("<h3>sls_lockorder<h3>\n") 146 out.write("<table border=\"1\">\n") 147 out.write("<tr bgcolor=\"orange\">\n") 148 out.write("<th align=\"left\">Field Name</th>\n") 149 out.write("<th align=\"left\">Type</th>\n") 150 out.write("<th align=\"left\">Value</th>\n") 151 out.write("<th align=\"left\">Value in Lookup Table</th>\n") 152 out.write("<th align=\"left\">Units</th>\n") 153 out.write("\n") 154 out.write("<tr>\n") 155 out.write("<td>vessel</td>\n") 156 out.write("<td>aisstr6</td>\n") 157 if 'vessel' in params: 158 out.write(" <td>"+str(params['vessel'])+"</td>\n") 159 out.write(" <td>"+str(params['vessel'])+"</td>\n") 160 out.write("</tr>\n") 161 out.write("\n") 162 out.write("<tr>\n") 163 out.write("<td>direction</td>\n") 164 out.write("<td>bool</td>\n") 165 if 'direction' in params: 166 out.write(" <td>"+str(params['direction'])+"</td>\n") 167 if str(params['direction']) in directionDecodeLut: 168 out.write("<td>"+directionDecodeLut[str(params['direction'])]+"</td>") 169 else: 170 out.write("<td><i>Missing LUT entry</i></td>") 171 out.write("</tr>\n") 172 out.write("\n") 173 out.write("<tr>\n") 174 out.write("<td>ETA_month</td>\n") 175 out.write("<td>uint</td>\n") 176 if 'ETA_month' in params: 177 out.write(" <td>"+str(params['ETA_month'])+"</td>\n") 178 out.write(" <td>"+str(params['ETA_month'])+"</td>\n") 179 out.write("</tr>\n") 180 out.write("\n") 181 out.write("<tr>\n") 182 out.write("<td>ETA_day</td>\n") 183 out.write("<td>uint</td>\n") 184 if 'ETA_day' in params: 185 out.write(" <td>"+str(params['ETA_day'])+"</td>\n") 186 out.write(" <td>"+str(params['ETA_day'])+"</td>\n") 187 out.write("</tr>\n") 188 out.write("\n") 189 out.write("<tr>\n") 190 out.write("<td>ETA_hour</td>\n") 191 out.write("<td>uint</td>\n") 192 if 'ETA_hour' in params: 193 out.write(" <td>"+str(params['ETA_hour'])+"</td>\n") 194 out.write(" <td>"+str(params['ETA_hour'])+"</td>\n") 195 out.write("</tr>\n") 196 out.write("\n") 197 out.write("<tr>\n") 198 out.write("<td>ETA_min</td>\n") 199 out.write("<td>uint</td>\n") 200 if 'ETA_min' in params: 201 out.write(" <td>"+str(params['ETA_min'])+"</td>\n") 202 out.write(" <td>"+str(params['ETA_min'])+"</td>\n") 203 out.write("</tr>\n") 204 out.write("\n") 205 out.write("<tr>\n") 206 out.write("<td>reserved</td>\n") 207 out.write("<td>uint</td>\n") 208 if 'reserved' in params: 209 out.write(" <td>"+str(params['reserved'])+"</td>\n") 210 out.write(" <td>"+str(params['reserved'])+"</td>\n") 211 out.write("</tr>\n") 212 out.write("</table>\n")
213
214 -def printFields(params, out=sys.stdout, format='std', fieldList=None):
215 '''Print a reserved message to stdout. 216 217 Fields in params: 218 - vessel(aisstr6): Vessel Name 219 - direction(bool): Up bound/Down bound 220 - ETA_month(uint): Estimated time of arrival month 1..12 221 - ETA_day(uint): Estimated time of arrival day of the month 1..31 222 - ETA_hour(uint): Estimated time of arrival UTC hours 0..23 223 - ETA_min(uint): Estimated time of arrival minutes 224 - reserved(uint): Reserved bits for future use (field automatically set to "0") 225 @param params: Dictionary of field names/values. 226 @param out: File like object to write to 227 @rtype: stdout 228 @return: text to out 229 ''' 230 231 if 'std'==format: 232 out.write("reserved:\n") 233 if 'vessel' in params: out.write(" vessel: "+str(params['vessel'])+"\n") 234 if 'direction' in params: out.write(" direction: "+str(params['direction'])+"\n") 235 if 'ETA_month' in params: out.write(" ETA_month: "+str(params['ETA_month'])+"\n") 236 if 'ETA_day' in params: out.write(" ETA_day: "+str(params['ETA_day'])+"\n") 237 if 'ETA_hour' in params: out.write(" ETA_hour: "+str(params['ETA_hour'])+"\n") 238 if 'ETA_min' in params: out.write(" ETA_min: "+str(params['ETA_min'])+"\n") 239 if 'reserved' in params: out.write(" reserved: "+str(params['reserved'])+"\n") 240 elif 'csv'==format: 241 if None == options.fieldList: 242 options.fieldList = fieldList 243 needComma = False; 244 for field in fieldList: 245 if needComma: out.write(',') 246 needComma = True 247 if field in params: 248 out.write(str(params[field])) 249 # else: leave it empty 250 out.write("\n") 251 elif 'html'==format: 252 printHtml(params,out) 253 else: 254 print "ERROR: unknown format:",format 255 assert False 256 257 return # Nothing to return
258 259 directionEncodeLut = { 260 'Down bound':'0', 261 'Up bound':'1', 262 } #directionEncodeLut 263 264 directionDecodeLut = { 265 '0':'Down bound', 266 '1':'Up bound', 267 } # directionEncodeLut 268 269 270 271 ###################################################################### 272 # UNIT TESTING 273 ###################################################################### 274 import unittest
275 -def testParams():
276 '''Return a params file base on the testvalue tags. 277 @rtype: dict 278 @return: params based on testvalue tags 279 ''' 280 params = {} 281 params['vessel'] = 'ICEBERG@@@@@@@@' 282 params['direction'] = True 283 params['ETA_month'] = 2 284 params['ETA_day'] = 28 285 params['ETA_hour'] = 23 286 params['ETA_min'] = 45 287 params['reserved'] = 0 288 289 return params
290
291 -class Testsls_lockorder(unittest.TestCase):
292 '''Use testvalue tag text from each type to build test case the sls_lockorder message'''
293 - def testEncodeDecode(self):
294 295 params = testParams() 296 bits = encode(params) 297 r = decode(bits) 298 299 # Check that each parameter came through ok. 300 self.failUnlessEqual(r['vessel'],params['vessel']) 301 self.failUnlessEqual(r['direction'],params['direction']) 302 self.failUnlessEqual(r['ETA_month'],params['ETA_month']) 303 self.failUnlessEqual(r['ETA_day'],params['ETA_day']) 304 self.failUnlessEqual(r['ETA_hour'],params['ETA_hour']) 305 self.failUnlessEqual(r['ETA_min'],params['ETA_min']) 306 self.failUnlessEqual(r['reserved'],params['reserved'])
307
308 -def addMsgOptions(parser):
309 parser.add_option('-d','--decode',dest='doDecode',default=False,action='store_true', 310 help='decode a "sls_lockorder" AIS message') 311 parser.add_option('-e','--encode',dest='doEncode',default=False,action='store_true', 312 help='encode a "sls_lockorder" AIS message') 313 parser.add_option('--vessel-field', dest='vesselField',default='@@@@@@@@@@@@@@@',metavar='aisstr6',type='string' 314 ,help='Field parameter value [default: %default]') 315 parser.add_option('--direction-field', dest='directionField',metavar='bool',type='int' 316 ,help='Field parameter value [default: %default]') 317 parser.add_option('--ETA_month-field', dest='ETA_monthField',metavar='uint',type='int' 318 ,help='Field parameter value [default: %default]') 319 parser.add_option('--ETA_day-field', dest='ETA_dayField',metavar='uint',type='int' 320 ,help='Field parameter value [default: %default]') 321 parser.add_option('--ETA_hour-field', dest='ETA_hourField',metavar='uint',type='int' 322 ,help='Field parameter value [default: %default]') 323 parser.add_option('--ETA_min-field', dest='ETA_minField',metavar='uint',type='int' 324 ,help='Field parameter value [default: %default]')
325 326 ############################################################ 327 if __name__=='__main__': 328 329 from optparse import OptionParser 330 parser = OptionParser(usage="%prog [options]", 331 version="%prog "+__version__) 332 333 parser.add_option('--doc-test',dest='doctest',default=False,action='store_true', 334 help='run the documentation tests') 335 parser.add_option('--unit-test',dest='unittest',default=False,action='store_true', 336 help='run the unit tests') 337 parser.add_option('-v','--verbose',dest='verbose',default=False,action='store_true', 338 help='Make the test output verbose') 339 340 # FIX: remove nmea from binary messages. No way to build the whole packet? 341 # FIX: or build the surrounding msg 8 for a broadcast? 342 typeChoices = ('binary','nmeapayload','nmea') # FIX: what about a USCG type message? 343 parser.add_option('-t','--type',choices=typeChoices,type='choice',dest='ioType' 344 ,default='nmeapayload' 345 ,help='What kind of string to expect ('+', '.join(typeChoices)+') [default: %default]') 346 347 348 outputChoices = ('std','html','csv' ) 349 parser.add_option('-T','--output-type',choices=outputChoices,type='choice',dest='outputType' 350 ,default='std' 351 ,help='What kind of string to output ('+', '.join(outputChoices)+') [default: %default]') 352 353 parser.add_option('-o','--output',dest='outputFileName',default=None, 354 help='Name of the python file to write [default: stdout]') 355 356 parser.add_option('-f','--fields',dest='fieldList',default=None, action='append', 357 choices=fieldList, 358 help='Which fields to include in the output. Currently only for csv output [default: all]') 359 360 parser.add_option('-p','--print-csv-field-list',dest='printCsvfieldList',default=False,action='store_true', 361 help='Print the field name for csv') 362 363 addMsgOptions(parser) 364 365 (options,args) = parser.parse_args() 366 success=True 367 368 if options.doctest: 369 import os; print os.path.basename(sys.argv[0]), 'doctests ...', 370 sys.argv= [sys.argv[0]] 371 if options.verbose: sys.argv.append('-v') 372 import doctest 373 numfail,numtests=doctest.testmod() 374 if numfail==0: print 'ok' 375 else: 376 print 'FAILED' 377 success=False 378 379 if not success: sys.exit('Something Failed') 380 del success # Hide success from epydoc 381 382 if options.unittest: 383 sys.argv = [sys.argv[0]] 384 if options.verbose: sys.argv.append('-v') 385 unittest.main() 386 387 outfile = sys.stdout 388 if None!=options.outputFileName: 389 outfile = file(options.outputFileName,'w') 390 391 392 if options.doEncode: 393 # First make sure all non required options are specified 394 if None==options.vesselField: parser.error("missing value for vesselField") 395 if None==options.directionField: parser.error("missing value for directionField") 396 if None==options.ETA_monthField: parser.error("missing value for ETA_monthField") 397 if None==options.ETA_dayField: parser.error("missing value for ETA_dayField") 398 if None==options.ETA_hourField: parser.error("missing value for ETA_hourField") 399 if None==options.ETA_minField: parser.error("missing value for ETA_minField") 400 msgDict={ 401 'vessel': options.vesselField, 402 'direction': options.directionField, 403 'ETA_month': options.ETA_monthField, 404 'ETA_day': options.ETA_dayField, 405 'ETA_hour': options.ETA_hourField, 406 'ETA_min': options.ETA_minField, 407 'reserved': '0', 408 } 409 410 bits = encode(msgDict) 411 if 'binary'==options.ioType: print str(bits) 412 elif 'nmeapayload'==options.ioType: 413 # FIX: figure out if this might be necessary at compile time 414 print "bitLen",len(bits) 415 bitLen=len(bits) 416 if bitLen%6!=0: 417 bits = bits + BitVector(size=(6 - (bitLen%6))) # Pad out to multiple of 6 418 print "result:",binary.bitvectoais6(bits)[0] 419 420 421 # FIX: Do not emit this option for the binary message payloads. Does not make sense. 422 elif 'nmea'==options.ioType: sys.exit("FIX: need to implement this capability") 423 else: sys.exit('ERROR: unknown ioType. Help!') 424 425 if options.printCsvfieldList: 426 # Make a csv separated list of fields that will be displayed for csv 427 if None == options.fieldList: options.fieldList = fieldList 428 import StringIO 429 buf = StringIO.StringIO() 430 for field in options.fieldList: 431 buf.write(field+',') 432 result = buf.getvalue() 433 if result[-1] == ',': print result[:-1] 434 else: print result 435 436 if options.doDecode: 437 for msg in args: 438 bv = None 439 if 'binary' == options.ioType: bv = BitVector(bitstring=msg) 440 elif 'nmeapayload'== options.ioType: bv = binary.ais6tobitvec(msg) 441 elif 'nmea' == options.ioType: bv = binary.ais6tobitvec(msg.split(',')[5]) 442 else: sys.exit('ERROR: unknown ioType. Help!') 443 444 printFields(decode(bv),out=outfile,format=options.outputType,fieldList=options.fieldList) 445