release/src/router/dnscrypt/src/libevent-modified/event_rpcgen.py

   1 #!/usr/bin/env python2
   2 #
   3 # Copyright (c) 2005-2007 Niels Provos <provos@citi.umich.edu>
   4 # Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
   5 # All rights reserved.
   6 #
   7 # Generates marshaling code based on libevent.
   8
   9 # TODO:
  10 # 1) use optparse to allow the strategy shell to parse options, and
  11 #    to allow the instantiated factory (for the specific output language)
  12 #    to parse remaining options
  13 # 2) move the globals into a class that manages execution (including the
  14 #    progress outputs that space stderr at the moment)
  15 # 3) emit other languages
  16
  17 import sys
  18 import re
  19
  20 _NAME = "event_rpcgen.py"
  21 _VERSION = "0.1"
  22
  23 # Globals
  24 line_count = 0
  25
  26 white = re.compile(r'\s+')
  27 cppcomment = re.compile(r'\/\/.*$')
  28 nonident = re.compile(r'[^a-zA-Z0-9_]')
  29 structref = re.compile(r'^struct\[([a-zA-Z_][a-zA-Z0-9_]*)\]$')
  30 structdef = re.compile(r'^struct +[a-zA-Z_][a-zA-Z0-9_]* *{$')
  31
  32 headerdirect = []
  33 cppdirect = []
  34
  35 def TranslateList(mylist, mydict):
  36     return map(lambda x: x % mydict, mylist)
  37
  38 # Exception class for parse errors
  39 class RpcGenError(Exception):
  40         def __init__(self, why):
  41                 self.why = why
  42         def __str__(self):
  43                 return str(self.why)
  44
  45 # Holds everything that makes a struct
  46 class Struct:
  47     def __init__(self, name):
  48         self._name = name
  49         self._entries = []
  50         self._tags = {}
  51         print >>sys.stderr, '  Created struct: %s' % name
  52
  53     def AddEntry(self, entry):
  54         if self._tags.has_key(entry.Tag()):
  55             raise RpcGenError(
  56                 'Entry "%s" duplicates tag number %d from "%s" '
  57                 'around line %d' % (entry.Name(), entry.Tag(),
  58                                     self._tags[entry.Tag()], line_count))
  59         self._entries.append(entry)
  60         self._tags[entry.Tag()] = entry.Name()
  61         print >>sys.stderr, '    Added entry: %s' % entry.Name()
  62
  63     def Name(self):
  64         return self._name
  65
  66     def EntryTagName(self, entry):
  67         """Creates the name inside an enumeration for distinguishing data
  68         types."""
  69         name = "%s_%s" % (self._name, entry.Name())
  70         return name.upper()
  71
  72     def PrintIndented(self, file, ident, code):
  73         """Takes an array, add indentation to each entry and prints it."""
  74         for entry in code:
  75             print >>file, '%s%s' % (ident, entry)
  76
  77 class StructCCode(Struct):
  78     """ Knows how to generate C code for a struct """
  79
  80     def __init__(self, name):
  81         Struct.__init__(self, name)
  82
  83     def PrintTags(self, file):
  84         """Prints the tag definitions for a structure."""
  85         print >>file, '/* Tag definition for %s */' % self._name
  86         print >>file, 'enum %s_ {' % self._name.lower()
  87         for entry in self._entries:
  88             print >>file, '  %s=%d,' % (self.EntryTagName(entry),
  89                                         entry.Tag())
  90         print >>file, '  %s_MAX_TAGS' % (self._name.upper())
  91         print >>file, '};\n'
  92
  93     def PrintForwardDeclaration(self, file):
  94         print >>file, 'struct %s;' % self._name
  95
  96     def PrintDeclaration(self, file):
  97         print >>file, '/* Structure declaration for %s */' % self._name
  98         print >>file, 'struct %s_access_ {' % self._name
  99         for entry in self._entries:
 100             dcl = entry.AssignDeclaration('(*%s_assign)' % entry.Name())
 101             dcl.extend(
 102                 entry.GetDeclaration('(*%s_get)' % entry.Name()))
 103             if entry.Array():
 104                 dcl.extend(
 105                     entry.AddDeclaration('(*%s_add)' % entry.Name()))
 106             self.PrintIndented(file, '  ', dcl)
 107         print >>file, '};\n'
 108
 109         print >>file, 'struct %s {' % self._name
 110         print >>file, '  struct %s_access_ *base;\n' % self._name
 111         for entry in self._entries:
 112             dcl = entry.Declaration()
 113             self.PrintIndented(file, '  ', dcl)
 114         print >>file, ''
 115         for entry in self._entries:
 116             print >>file, '  ev_uint8_t %s_set;' % entry.Name()
 117         print >>file, '};\n'
 118
 119         print >>file, \
 120 """struct %(name)s *%(name)s_new(void);
 121 struct %(name)s *%(name)s_new_with_arg(void *);
 122 void %(name)s_free(struct %(name)s *);
 123 void %(name)s_clear(struct %(name)s *);
 124 void %(name)s_marshal(struct evbuffer *, const struct %(name)s *);
 125 int %(name)s_unmarshal(struct %(name)s *, struct evbuffer *);
 126 int %(name)s_complete(struct %(name)s *);
 127 void evtag_marshal_%(name)s(struct evbuffer *, ev_uint32_t,
 128     const struct %(name)s *);
 129 int evtag_unmarshal_%(name)s(struct evbuffer *, ev_uint32_t,
 130     struct %(name)s *);""" % { 'name' : self._name }
 131
 132
 133         # Write a setting function of every variable
 134         for entry in self._entries:
 135             self.PrintIndented(file, '', entry.AssignDeclaration(
 136                 entry.AssignFuncName()))
 137             self.PrintIndented(file, '', entry.GetDeclaration(
 138                 entry.GetFuncName()))
 139             if entry.Array():
 140                 self.PrintIndented(file, '', entry.AddDeclaration(
 141                     entry.AddFuncName()))
 142
 143         print >>file, '/* --- %s done --- */\n' % self._name
 144
 145     def PrintCode(self, file):
 146         print >>file, ('/*\n'
 147                        ' * Implementation of %s\n'
 148                        ' */\n') % self._name
 149
 150         print >>file, \
 151               'static struct %(name)s_access_ __%(name)s_base = {' % \
 152               { 'name' : self._name }
 153         for entry in self._entries:
 154             self.PrintIndented(file, '  ', entry.CodeBase())
 155         print >>file, '};\n'
 156
 157         # Creation
 158         print >>file, (
 159             'struct %(name)s *\n'
 160             '%(name)s_new(void)\n'
 161             '{\n'
 162             '  return %(name)s_new_with_arg(NULL);\n'
 163             '}\n'
 164             '\n'
 165             'struct %(name)s *\n'
 166             '%(name)s_new_with_arg(void *unused)\n'
 167             '{\n'
 168             '  struct %(name)s *tmp;\n'
 169             '  if ((tmp = malloc(sizeof(struct %(name)s))) == NULL) {\n'
 170             '    event_warn("%%s: malloc", __func__);\n'
 171             '    return (NULL);\n'
 172             '  }\n'
 173             '  tmp->base = &__%(name)s_base;\n') % { 'name' : self._name }
 174
 175         for entry in self._entries:
 176             self.PrintIndented(file, '  ', entry.CodeInitialize('tmp'))
 177             print >>file, '  tmp->%s_set = 0;\n' % entry.Name()
 178
 179         print >>file, (
 180             '  return (tmp);\n'
 181             '}\n')
 182
 183         # Adding
 184         for entry in self._entries:
 185             if entry.Array():
 186                 self.PrintIndented(file, '', entry.CodeAdd())
 187             print >>file, ''
 188
 189         # Assigning
 190         for entry in self._entries:
 191             self.PrintIndented(file, '', entry.CodeAssign())
 192             print >>file, ''
 193
 194         # Getting
 195         for entry in self._entries:
 196             self.PrintIndented(file, '', entry.CodeGet())
 197             print >>file, ''
 198
 199         # Clearing
 200         print >>file, ( 'void\n'
 201                         '%(name)s_clear(struct %(name)s *tmp)\n'
 202                         '{'
 203                         ) % { 'name' : self._name }
 204         for entry in self._entries:
 205             self.PrintIndented(file, '  ', entry.CodeClear('tmp'))
 206
 207         print >>file, '}\n'
 208
 209         # Freeing
 210         print >>file, ( 'void\n'
 211                         '%(name)s_free(struct %(name)s *tmp)\n'
 212                         '{'
 213                         ) % { 'name' : self._name }
 214
 215         for entry in self._entries:
 216             self.PrintIndented(file, '  ', entry.CodeFree('tmp'))
 217
 218         print >>file, ('  free(tmp);\n'
 219                        '}\n')
 220
 221         # Marshaling
 222         print >>file, ('void\n'
 223                        '%(name)s_marshal(struct evbuffer *evbuf, '
 224                        'const struct %(name)s *tmp)'
 225                        '{') % { 'name' : self._name }
 226         for entry in self._entries:
 227             indent = '  '
 228             # Optional entries do not have to be set
 229             if entry.Optional():
 230                 indent += '  '
 231                 print >>file, '  if (tmp->%s_set) {' % entry.Name()
 232             self.PrintIndented(
 233                 file, indent,
 234                 entry.CodeMarshal('evbuf', self.EntryTagName(entry),
 235                                   entry.GetVarName('tmp'),
 236                                   entry.GetVarLen('tmp')))
 237             if entry.Optional():
 238                 print >>file, '  }'
 239
 240         print >>file, '}\n'
 241
 242         # Unmarshaling
 243         print >>file, ('int\n'
 244                        '%(name)s_unmarshal(struct %(name)s *tmp, '
 245                        ' struct evbuffer *evbuf)\n'
 246                        '{\n'
 247                        '  ev_uint32_t tag;\n'
 248                        '  while (evbuffer_get_length(evbuf) > 0) {\n'
 249                        '    if (evtag_peek(evbuf, &tag) == -1)\n'
 250                        '      return (-1);\n'
 251                        '    switch (tag) {\n'
 252                        ) % { 'name' : self._name }
 253         for entry in self._entries:
 254             print >>file, '      case %s:\n' % self.EntryTagName(entry)
 255             if not entry.Array():
 256                 print >>file, (
 257                     '        if (tmp->%s_set)\n'
 258                     '          return (-1);'
 259                     ) % (entry.Name())
 260
 261             self.PrintIndented(
 262                 file, '        ',
 263                 entry.CodeUnmarshal('evbuf',
 264                                     self.EntryTagName(entry),
 265                                     entry.GetVarName('tmp'),
 266                                     entry.GetVarLen('tmp')))
 267
 268             print >>file, ( '        tmp->%s_set = 1;\n' % entry.Name() +
 269                             '        break;\n' )
 270         print >>file, ( '      default:\n'
 271                         '        return -1;\n'
 272                         '    }\n'
 273                         '  }\n' )
 274         # Check if it was decoded completely
 275         print >>file, ( '  if (%(name)s_complete(tmp) == -1)\n'
 276                         '    return (-1);'
 277                         ) % { 'name' : self._name }
 278
 279         # Successfully decoded
 280         print >>file, ( '  return (0);\n'
 281                         '}\n')
 282
 283         # Checking if a structure has all the required data
 284         print >>file, (
 285             'int\n'
 286             '%(name)s_complete(struct %(name)s *msg)\n'
 287             '{' ) % { 'name' : self._name }
 288         for entry in self._entries:
 289             if not entry.Optional():
 290                 code = [
 291                     'if (!msg->%(name)s_set)',
 292                     '  return (-1);' ]
 293                 code = TranslateList(code, entry.GetTranslation())
 294                 self.PrintIndented(
 295                     file, '  ', code)
 296
 297             self.PrintIndented(
 298                 file, '  ',
 299                 entry.CodeComplete('msg', entry.GetVarName('msg')))
 300         print >>file, (
 301             '  return (0);\n'
 302             '}\n' )
 303
 304         # Complete message unmarshaling
 305         print >>file, (
 306             'int\n'
 307             'evtag_unmarshal_%(name)s(struct evbuffer *evbuf, '
 308             'ev_uint32_t need_tag, struct %(name)s *msg)\n'
 309             '{\n'
 310             '  ev_uint32_t tag;\n'
 311             '  int res = -1;\n'
 312             '\n'
 313             '  struct evbuffer *tmp = evbuffer_new();\n'
 314             '\n'
 315             '  if (evtag_unmarshal(evbuf, &tag, tmp) == -1'
 316             ' || tag != need_tag)\n'
 317             '    goto error;\n'
 318             '\n'
 319             '  if (%(name)s_unmarshal(msg, tmp) == -1)\n'
 320             '    goto error;\n'
 321             '\n'
 322             '  res = 0;\n'
 323             '\n'
 324             ' error:\n'
 325             '  evbuffer_free(tmp);\n'
 326             '  return (res);\n'
 327             '}\n' ) % { 'name' : self._name }
 328
 329         # Complete message marshaling
 330         print >>file, (
 331             'void\n'
 332             'evtag_marshal_%(name)s(struct evbuffer *evbuf, ev_uint32_t tag, '
 333             'const struct %(name)s *msg)\n'
 334             '{\n'
 335             '  struct evbuffer *_buf = evbuffer_new();\n'
 336             '  assert(_buf != NULL);\n'
 337             '  %(name)s_marshal(_buf, msg);\n'
 338             '  evtag_marshal_buffer(evbuf, tag, _buf);\n '
 339             '  evbuffer_free(_buf);\n'
 340             '}\n' ) % { 'name' : self._name }
 341
 342 class Entry:
 343     def __init__(self, type, name, tag):
 344         self._type = type
 345         self._name = name
 346         self._tag = int(tag)
 347         self._ctype = type
 348         self._optional = 0
 349         self._can_be_array = 0
 350         self._array = 0
 351         self._line_count = -1
 352         self._struct = None
 353         self._refname = None
 354
 355         self._optpointer = True
 356         self._optaddarg = True
 357
 358     def GetInitializer(self):
 359         assert 0, "Entry does not provide initializer"
 360
 361     def SetStruct(self, struct):
 362         self._struct = struct
 363
 364     def LineCount(self):
 365         assert self._line_count != -1
 366         return self._line_count
 367
 368     def SetLineCount(self, number):
 369         self._line_count = number
 370
 371     def Array(self):
 372         return self._array
 373
 374     def Optional(self):
 375         return self._optional
 376
 377     def Tag(self):
 378         return self._tag
 379
 380     def Name(self):
 381         return self._name
 382
 383     def Type(self):
 384         return self._type
 385
 386     def MakeArray(self, yes=1):
 387         self._array = yes
 388
 389     def MakeOptional(self):
 390         self._optional = 1
 391
 392     def Verify(self):
 393         if self.Array() and not self._can_be_array:
 394             raise RpcGenError(
 395                 'Entry "%s" cannot be created as an array '
 396                 'around line %d' % (self._name, self.LineCount()))
 397         if not self._struct:
 398             raise RpcGenError(
 399                 'Entry "%s" does not know which struct it belongs to '
 400                 'around line %d' % (self._name, self.LineCount()))
 401         if self._optional and self._array:
 402             raise RpcGenError(
 403                 'Entry "%s" has illegal combination of optional and array '
 404                 'around line %d' % (self._name, self.LineCount()))
 405
 406     def GetTranslation(self, extradict = {}):
 407         mapping = {
 408             "parent_name" : self._struct.Name(),
 409             "name" : self._name,
 410             "ctype" : self._ctype,
 411             "refname" : self._refname,
 412             "optpointer" : self._optpointer and "*" or "",
 413             "optreference" : self._optpointer and "&" or "",
 414             "optaddarg" :
 415             self._optaddarg and ", const %s value" % self._ctype or ""
 416             }
 417         for (k, v) in extradict.items():
 418             mapping[k] = v
 419
 420         return mapping
 421
 422     def GetVarName(self, var):
 423         return '%(var)s->%(name)s_data' % self.GetTranslation({ 'var' : var })
 424
 425     def GetVarLen(self, var):
 426         return 'sizeof(%s)' % self._ctype
 427
 428     def GetFuncName(self):
 429         return '%s_%s_get' % (self._struct.Name(), self._name)
 430
 431     def GetDeclaration(self, funcname):
 432         code = [ 'int %s(struct %s *, %s *);' % (
 433             funcname, self._struct.Name(), self._ctype ) ]
 434         return code
 435
 436     def CodeGet(self):
 437         code = (
 438             'int',
 439             '%(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, '
 440             '%(ctype)s *value)',
 441             '{',
 442             '  if (msg->%(name)s_set != 1)',
 443             '    return (-1);',
 444             '  *value = msg->%(name)s_data;',
 445             '  return (0);',
 446             '}' )
 447         code = '\n'.join(code)
 448         code = code % self.GetTranslation()
 449         return code.split('\n')
 450
 451     def AssignFuncName(self):
 452         return '%s_%s_assign' % (self._struct.Name(), self._name)
 453
 454     def AddFuncName(self):
 455         return '%s_%s_add' % (self._struct.Name(), self._name)
 456
 457     def AssignDeclaration(self, funcname):
 458         code = [ 'int %s(struct %s *, const %s);' % (
 459             funcname, self._struct.Name(), self._ctype ) ]
 460         return code
 461
 462     def CodeAssign(self):
 463         code = [ 'int',
 464                  '%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,'
 465                  ' const %(ctype)s value)',
 466                  '{',
 467                  '  msg->%(name)s_set = 1;',
 468                  '  msg->%(name)s_data = value;',
 469                  '  return (0);',
 470                  '}' ]
 471         code = '\n'.join(code)
 472         code = code % self.GetTranslation()
 473         return code.split('\n')
 474
 475     def CodeClear(self, structname):
 476         code = [ '%s->%s_set = 0;' % (structname, self.Name()) ]
 477
 478         return code
 479
 480     def CodeComplete(self, structname, var_name):
 481         return []
 482
 483     def CodeFree(self, name):
 484         return []
 485
 486     def CodeBase(self):
 487         code = [
 488             '%(parent_name)s_%(name)s_assign,',
 489             '%(parent_name)s_%(name)s_get,'
 490             ]
 491         if self.Array():
 492             code.append('%(parent_name)s_%(name)s_add,')
 493
 494         code = '\n'.join(code)
 495         code = code % self.GetTranslation()
 496         return code.split('\n')
 497
 498 class EntryBytes(Entry):
 499     def __init__(self, type, name, tag, length):
 500         # Init base class
 501         Entry.__init__(self, type, name, tag)
 502
 503         self._length = length
 504         self._ctype = 'ev_uint8_t'
 505
 506     def GetInitializer(self):
 507         return "NULL"
 508
 509     def GetVarLen(self, var):
 510         return '(%s)' % self._length
 511
 512     def CodeArrayAdd(self, varname, value):
 513         # XXX: copy here
 514         return [ '%(varname)s = NULL;' % { 'varname' : varname } ]
 515
 516     def GetDeclaration(self, funcname):
 517         code = [ 'int %s(struct %s *, %s **);' % (
 518             funcname, self._struct.Name(), self._ctype ) ]
 519         return code
 520
 521     def AssignDeclaration(self, funcname):
 522         code = [ 'int %s(struct %s *, const %s *);' % (
 523             funcname, self._struct.Name(), self._ctype ) ]
 524         return code
 525
 526     def Declaration(self):
 527         dcl  = ['ev_uint8_t %s_data[%s];' % (self._name, self._length)]
 528
 529         return dcl
 530
 531     def CodeGet(self):
 532         name = self._name
 533         code = [ 'int',
 534                  '%s_%s_get(struct %s *msg, %s **value)' % (
 535             self._struct.Name(), name,
 536             self._struct.Name(), self._ctype),
 537                  '{',
 538                  '  if (msg->%s_set != 1)' % name,
 539                  '    return (-1);',
 540                  '  *value = msg->%s_data;' % name,
 541                  '  return (0);',
 542                  '}' ]
 543         return code
 544
 545     def CodeAssign(self):
 546         name = self._name
 547         code = [ 'int',
 548                  '%s_%s_assign(struct %s *msg, const %s *value)' % (
 549             self._struct.Name(), name,
 550             self._struct.Name(), self._ctype),
 551                  '{',
 552                  '  msg->%s_set = 1;' % name,
 553                  '  memcpy(msg->%s_data, value, %s);' % (
 554             name, self._length),
 555                  '  return (0);',
 556                  '}' ]
 557         return code
 558
 559     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
 560         code = [  'if (evtag_unmarshal_fixed(%(buf)s, %(tag)s, '
 561                   '%(var)s, %(varlen)s) == -1) {',
 562                   '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
 563                   '  return (-1);',
 564                   '}'
 565                   ]
 566         return TranslateList(code,
 567                              self.GetTranslation({
 568             'var' : var_name,
 569             'varlen' : var_len,
 570             'buf' : buf,
 571             'tag' : tag_name }))
 572
 573     def CodeMarshal(self, buf, tag_name, var_name, var_len):
 574         code = ['evtag_marshal(%s, %s, %s, %s);' % (
 575             buf, tag_name, var_name, var_len)]
 576         return code
 577
 578     def CodeClear(self, structname):
 579         code = [ '%s->%s_set = 0;' % (structname, self.Name()),
 580                  'memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (
 581             structname, self._name, structname, self._name)]
 582
 583         return code
 584
 585     def CodeInitialize(self, name):
 586         code  = ['memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (
 587             name, self._name, name, self._name)]
 588         return code
 589
 590     def Verify(self):
 591         if not self._length:
 592             raise RpcGenError(
 593                 'Entry "%s" needs a length '
 594                 'around line %d' % (self._name, self.LineCount()))
 595
 596         Entry.Verify(self)
 597
 598 class EntryInt(Entry):
 599     def __init__(self, type, name, tag, bits=32):
 600         # Init base class
 601         Entry.__init__(self, type, name, tag)
 602
 603         self._can_be_array = 1
 604         if bits == 32:
 605             self._ctype = 'ev_uint32_t'
 606             self._marshal_type = 'int'
 607         if bits == 64:
 608             self._ctype = 'ev_uint64_t'
 609             self._marshal_type = 'int64'
 610
 611     def GetInitializer(self):
 612         return "0"
 613
 614     def CodeArrayFree(self, var):
 615         return []
 616
 617     def CodeArrayAssign(self, varname, srcvar):
 618         return [ '%(varname)s = %(srcvar)s;' % { 'varname' : varname,
 619                                                 'srcvar' : srcvar } ]
 620
 621     def CodeArrayAdd(self, varname, value):
 622         """Returns a new entry of this type."""
 623         return [ '%(varname)s = %(value)s;' % { 'varname' : varname,
 624                                               'value' : value } ]
 625
 626     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
 627         code = [
 628             'if (evtag_unmarshal_%(ma)s(%(buf)s, %(tag)s, &%(var)s) == -1) {',
 629             '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
 630             '  return (-1);',
 631             '}' ]
 632         code = '\n'.join(code) % self.GetTranslation({
 633             'ma'  : self._marshal_type,
 634             'buf' : buf,
 635             'tag' : tag_name,
 636             'var' : var_name })
 637         return code.split('\n')
 638
 639     def CodeMarshal(self, buf, tag_name, var_name, var_len):
 640         code = [
 641             'evtag_marshal_%s(%s, %s, %s);' % (
 642             self._marshal_type, buf, tag_name, var_name)]
 643         return code
 644
 645     def Declaration(self):
 646         dcl  = ['%s %s_data;' % (self._ctype, self._name)]
 647
 648         return dcl
 649
 650     def CodeInitialize(self, name):
 651         code = ['%s->%s_data = 0;' % (name, self._name)]
 652         return code
 653
 654 class EntryString(Entry):
 655     def __init__(self, type, name, tag):
 656         # Init base class
 657         Entry.__init__(self, type, name, tag)
 658
 659         self._can_be_array = 1
 660         self._ctype = 'char *'
 661
 662     def GetInitializer(self):
 663         return "NULL"
 664
 665     def CodeArrayFree(self, varname):
 666         code = [
 667             'if (%(var)s != NULL) free(%(var)s);' ]
 668
 669         return TranslateList(code, { 'var' : varname })
 670
 671     def CodeArrayAssign(self, varname, srcvar):
 672         code = [
 673             'if (%(var)s != NULL)',
 674             '  free(%(var)s);',
 675             '%(var)s = strdup(%(srcvar)s);',
 676             'if (%(var)s == NULL) {',
 677             '  event_warnx("%%s: strdup", __func__);',
 678             '  return (-1);',
 679             '}' ]
 680
 681         return TranslateList(code, { 'var' : varname,
 682                                      'srcvar' : srcvar })
 683
 684     def CodeArrayAdd(self, varname, value):
 685         code = [
 686             'if (%(value)s != NULL) {',
 687             '  %(var)s = strdup(%(value)s);',
 688             '  if (%(var)s == NULL) {',
 689             '    goto error;',
 690             '  }',
 691             '} else {',
 692             '  %(var)s = NULL;',
 693             '}' ]
 694
 695         return TranslateList(code, { 'var' : varname,
 696                                      'value' : value })
 697
 698     def GetVarLen(self, var):
 699         return 'strlen(%s)' % self.GetVarName(var)
 700
 701     def CodeMakeInitalize(self, varname):
 702         return '%(varname)s = NULL;' % { 'varname' : varname }
 703
 704     def CodeAssign(self):
 705         name = self._name
 706         code = """int
 707 %(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,
 708     const %(ctype)s value)
 709 {
 710   if (msg->%(name)s_data != NULL)
 711     free(msg->%(name)s_data);
 712   if ((msg->%(name)s_data = strdup(value)) == NULL)
 713     return (-1);
 714   msg->%(name)s_set = 1;
 715   return (0);
 716 }""" % self.GetTranslation()
 717
 718         return code.split('\n')
 719
 720     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
 721         code = ['if (evtag_unmarshal_string(%(buf)s, %(tag)s, &%(var)s) == -1) {',
 722                 '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
 723                 '  return (-1);',
 724                 '}'
 725                 ]
 726         code = '\n'.join(code) % self.GetTranslation({
 727             'buf' : buf,
 728             'tag' : tag_name,
 729             'var' : var_name })
 730         return code.split('\n')
 731
 732     def CodeMarshal(self, buf, tag_name, var_name, var_len):
 733         code = ['evtag_marshal_string(%s, %s, %s);' % (
 734             buf, tag_name, var_name)]
 735         return code
 736
 737     def CodeClear(self, structname):
 738         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
 739                  '  free(%s->%s_data);' % (structname, self.Name()),
 740                  '  %s->%s_data = NULL;' % (structname, self.Name()),
 741                  '  %s->%s_set = 0;' % (structname, self.Name()),
 742                  '}'
 743                  ]
 744
 745         return code
 746
 747     def CodeInitialize(self, name):
 748         code  = ['%s->%s_data = NULL;' % (name, self._name)]
 749         return code
 750
 751     def CodeFree(self, name):
 752         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
 753                  '    free (%s->%s_data);' % (name, self._name)]
 754
 755         return code
 756
 757     def Declaration(self):
 758         dcl  = ['char *%s_data;' % self._name]
 759
 760         return dcl
 761
 762 class EntryStruct(Entry):
 763     def __init__(self, type, name, tag, refname):
 764         # Init base class
 765         Entry.__init__(self, type, name, tag)
 766
 767         self._optpointer = False
 768         self._can_be_array = 1
 769         self._refname = refname
 770         self._ctype = 'struct %s*' % refname
 771         self._optaddarg = False
 772
 773     def GetInitializer(self):
 774         return "NULL"
 775
 776     def GetVarLen(self, var):
 777         return '-1'
 778
 779     def CodeArrayAdd(self, varname, value):
 780         code = [
 781             '%(varname)s = %(refname)s_new();',
 782             'if (%(varname)s == NULL)',
 783             '  goto error;' ]
 784
 785         return TranslateList(code, self.GetTranslation({ 'varname' : varname }))
 786
 787     def CodeArrayFree(self, var):
 788         code = [ '%(refname)s_free(%(var)s);' % self.GetTranslation(
 789             { 'var' : var }) ]
 790         return code
 791
 792     def CodeArrayAssign(self, var, srcvar):
 793         code = [
 794             'int had_error = 0;',
 795             'struct evbuffer *tmp = NULL;',
 796             '%(refname)s_clear(%(var)s);',
 797             'if ((tmp = evbuffer_new()) == NULL) {',
 798             '  event_warn("%%s: evbuffer_new()", __func__);',
 799             '  had_error = 1;',
 800             '  goto done;',
 801             '}',
 802             '%(refname)s_marshal(tmp, %(srcvar)s);',
 803             'if (%(refname)s_unmarshal(%(var)s, tmp) == -1) {',
 804             '  event_warnx("%%s: %(refname)s_unmarshal", __func__);',
 805             '  had_error = 1;',
 806             '  goto done;',
 807             '}',
 808             'done:'
 809             'if (tmp != NULL)',
 810             '  evbuffer_free(tmp);',
 811             'if (had_error) {',
 812             '  %(refname)s_clear(%(var)s);',
 813             '  return (-1);',
 814             '}' ]
 815
 816         return TranslateList(code, self.GetTranslation({
 817             'var' : var,
 818             'srcvar' : srcvar}))
 819
 820     def CodeGet(self):
 821         name = self._name
 822         code = [ 'int',
 823                  '%s_%s_get(struct %s *msg, %s *value)' % (
 824             self._struct.Name(), name,
 825             self._struct.Name(), self._ctype),
 826                  '{',
 827                  '  if (msg->%s_set != 1) {' % name,
 828                  '    msg->%s_data = %s_new();' % (name, self._refname),
 829                  '    if (msg->%s_data == NULL)' % name,
 830                  '      return (-1);',
 831                  '    msg->%s_set = 1;' % name,
 832                  '  }',
 833                  '  *value = msg->%s_data;' % name,
 834                  '  return (0);',
 835                  '}' ]
 836         return code
 837
 838     def CodeAssign(self):
 839         name = self._name
 840         code = """int
 841 %(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,
 842     const %(ctype)s value)
 843 {
 844    struct evbuffer *tmp = NULL;
 845    if (msg->%(name)s_set) {
 846      %(refname)s_clear(msg->%(name)s_data);
 847      msg->%(name)s_set = 0;
 848    } else {
 849      msg->%(name)s_data = %(refname)s_new();
 850      if (msg->%(name)s_data == NULL) {
 851        event_warn("%%s: %(refname)s_new()", __func__);
 852        goto error;
 853      }
 854    }
 855    if ((tmp = evbuffer_new()) == NULL) {
 856      event_warn("%%s: evbuffer_new()", __func__);
 857      goto error;
 858    }
 859    %(refname)s_marshal(tmp, value);
 860    if (%(refname)s_unmarshal(msg->%(name)s_data, tmp) == -1) {
 861      event_warnx("%%s: %(refname)s_unmarshal", __func__);
 862      goto error;
 863    }
 864    msg->%(name)s_set = 1;
 865    evbuffer_free(tmp);
 866    return (0);
 867  error:
 868    if (tmp != NULL)
 869      evbuffer_free(tmp);
 870    if (msg->%(name)s_data != NULL) {
 871      %(refname)s_free(msg->%(name)s_data);
 872      msg->%(name)s_data = NULL;
 873    }
 874    return (-1);
 875 }""" % self.GetTranslation()
 876         return code.split('\n')
 877
 878     def CodeComplete(self, structname, var_name):
 879         code = [ 'if (%(structname)s->%(name)s_set && '
 880                  '%(refname)s_complete(%(var)s) == -1)',
 881                  '  return (-1);' ]
 882
 883         return TranslateList(code, self.GetTranslation({
 884             'structname' : structname,
 885             'var' : var_name }))
 886
 887     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
 888         code = ['%(var)s = %(refname)s_new();',
 889                 'if (%(var)s == NULL)',
 890                 '  return (-1);',
 891                 'if (evtag_unmarshal_%(refname)s(%(buf)s, %(tag)s, '
 892                 '%(var)s) == -1) {',
 893                   '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
 894                 '  return (-1);',
 895                 '}'
 896                 ]
 897         code = '\n'.join(code) % self.GetTranslation({
 898             'buf' : buf,
 899             'tag' : tag_name,
 900             'var' : var_name })
 901         return code.split('\n')
 902
 903     def CodeMarshal(self, buf, tag_name, var_name, var_len):
 904         code = ['evtag_marshal_%s(%s, %s, %s);' % (
 905             self._refname, buf, tag_name, var_name)]
 906         return code
 907
 908     def CodeClear(self, structname):
 909         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
 910                  '  %s_free(%s->%s_data);' % (
 911             self._refname, structname, self.Name()),
 912                  '  %s->%s_data = NULL;' % (structname, self.Name()),
 913                  '  %s->%s_set = 0;' % (structname, self.Name()),
 914                  '}'
 915                  ]
 916
 917         return code
 918
 919     def CodeInitialize(self, name):
 920         code  = ['%s->%s_data = NULL;' % (name, self._name)]
 921         return code
 922
 923     def CodeFree(self, name):
 924         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
 925                  '    %s_free(%s->%s_data);' % (
 926             self._refname, name, self._name)]
 927
 928         return code
 929
 930     def Declaration(self):
 931         dcl  = ['%s %s_data;' % (self._ctype, self._name)]
 932
 933         return dcl
 934
 935 class EntryVarBytes(Entry):
 936     def __init__(self, type, name, tag):
 937         # Init base class
 938         Entry.__init__(self, type, name, tag)
 939
 940         self._ctype = 'ev_uint8_t *'
 941
 942     def GetInitializer(self):
 943         return "NULL"
 944
 945     def GetVarLen(self, var):
 946         return '%(var)s->%(name)s_length' % self.GetTranslation({ 'var' : var })
 947
 948     def CodeArrayAdd(self, varname, value):
 949         # xxx: copy
 950         return [ '%(varname)s = NULL;' % { 'varname' : varname } ]
 951
 952     def GetDeclaration(self, funcname):
 953         code = [ 'int %s(struct %s *, %s *, ev_uint32_t *);' % (
 954             funcname, self._struct.Name(), self._ctype ) ]
 955         return code
 956
 957     def AssignDeclaration(self, funcname):
 958         code = [ 'int %s(struct %s *, const %s, ev_uint32_t);' % (
 959             funcname, self._struct.Name(), self._ctype ) ]
 960         return code
 961
 962     def CodeAssign(self):
 963         name = self._name
 964         code = [ 'int',
 965                  '%s_%s_assign(struct %s *msg, '
 966                  'const %s value, ev_uint32_t len)' % (
 967             self._struct.Name(), name,
 968             self._struct.Name(), self._ctype),
 969                  '{',
 970                  '  if (msg->%s_data != NULL)' % name,
 971                  '    free (msg->%s_data);' % name,
 972                  '  msg->%s_data = malloc(len);' % name,
 973                  '  if (msg->%s_data == NULL)' % name,
 974                  '    return (-1);',
 975                  '  msg->%s_set = 1;' % name,
 976                  '  msg->%s_length = len;' % name,
 977                  '  memcpy(msg->%s_data, value, len);' % name,
 978                  '  return (0);',
 979                  '}' ]
 980         return code
 981
 982     def CodeGet(self):
 983         name = self._name
 984         code = [ 'int',
 985                  '%s_%s_get(struct %s *msg, %s *value, ev_uint32_t *plen)' % (
 986             self._struct.Name(), name,
 987             self._struct.Name(), self._ctype),
 988                  '{',
 989                  '  if (msg->%s_set != 1)' % name,
 990                  '    return (-1);',
 991                  '  *value = msg->%s_data;' % name,
 992                  '  *plen = msg->%s_length;' % name,
 993                  '  return (0);',
 994                  '}' ]
 995         return code
 996
 997     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
 998         code = ['if (evtag_payload_length(%(buf)s, &%(varlen)s) == -1)',
 999                 '  return (-1);',
1000                 # We do not want DoS opportunities
1001                 'if (%(varlen)s > evbuffer_get_length(%(buf)s))',
1002                 '  return (-1);',
1003                 'if ((%(var)s = malloc(%(varlen)s)) == NULL)',
1004                 '  return (-1);',
1005                 'if (evtag_unmarshal_fixed(%(buf)s, %(tag)s, %(var)s, '
1006                 '%(varlen)s) == -1) {',
1007                 '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
1008                 '  return (-1);',
1009                 '}'
1010                 ]
1011         code = '\n'.join(code) % self.GetTranslation({
1012             'buf' : buf,
1013             'tag' : tag_name,
1014             'var' : var_name,
1015             'varlen' : var_len })
1016         return code.split('\n')
1017
1018     def CodeMarshal(self, buf, tag_name, var_name, var_len):
1019         code = ['evtag_marshal(%s, %s, %s, %s);' % (
1020             buf, tag_name, var_name, var_len)]
1021         return code
1022
1023     def CodeClear(self, structname):
1024         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
1025                  '  free (%s->%s_data);' % (structname, self.Name()),
1026                  '  %s->%s_data = NULL;' % (structname, self.Name()),
1027                  '  %s->%s_length = 0;' % (structname, self.Name()),
1028                  '  %s->%s_set = 0;' % (structname, self.Name()),
1029                  '}'
1030                  ]
1031
1032         return code
1033
1034     def CodeInitialize(self, name):
1035         code  = ['%s->%s_data = NULL;' % (name, self._name),
1036                  '%s->%s_length = 0;' % (name, self._name) ]
1037         return code
1038
1039     def CodeFree(self, name):
1040         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
1041                  '    free(%s->%s_data);' % (name, self._name)]
1042
1043         return code
1044
1045     def Declaration(self):
1046         dcl  = ['ev_uint8_t *%s_data;' % self._name,
1047                 'ev_uint32_t %s_length;' % self._name]
1048
1049         return dcl
1050
1051 class EntryArray(Entry):
1052     def __init__(self, entry):
1053         # Init base class
1054         Entry.__init__(self, entry._type, entry._name, entry._tag)
1055
1056         self._entry = entry
1057         self._refname = entry._refname
1058         self._ctype = self._entry._ctype
1059         self._optional = True
1060         self._optpointer = self._entry._optpointer
1061         self._optaddarg = self._entry._optaddarg
1062
1063         # provide a new function for accessing the variable name
1064         def GetVarName(var_name):
1065             return '%(var)s->%(name)s_data[%(index)s]' % \
1066                    self._entry.GetTranslation({'var' : var_name,
1067                                                'index' : self._index})
1068         self._entry.GetVarName = GetVarName
1069
1070     def GetInitializer(self):
1071         return "NULL"
1072
1073     def GetVarName(self, var_name):
1074         return var_name
1075
1076     def GetVarLen(self, var_name):
1077         return '-1'
1078
1079     def GetDeclaration(self, funcname):
1080         """Allows direct access to elements of the array."""
1081         code = [
1082             'int %(funcname)s(struct %(parent_name)s *, int, %(ctype)s *);' %
1083             self.GetTranslation({ 'funcname' : funcname }) ]
1084         return code
1085
1086     def AssignDeclaration(self, funcname):
1087         code = [ 'int %s(struct %s *, int, const %s);' % (
1088             funcname, self._struct.Name(), self._ctype ) ]
1089         return code
1090
1091     def AddDeclaration(self, funcname):
1092         code = [
1093             '%(ctype)s %(optpointer)s '
1094             '%(funcname)s(struct %(parent_name)s *msg%(optaddarg)s);' % \
1095             self.GetTranslation({ 'funcname' : funcname }) ]
1096         return code
1097
1098     def CodeGet(self):
1099         code = """int
1100 %(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, int offset,
1101     %(ctype)s *value)
1102 {
1103   if (!msg->%(name)s_set || offset < 0 || offset >= msg->%(name)s_length)
1104     return (-1);
1105   *value = msg->%(name)s_data[offset];
1106   return (0);
1107 }""" % self.GetTranslation()
1108
1109         return code.split('\n')
1110
1111     def CodeAssign(self):
1112         code = [
1113             'int',
1114             '%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg, int off,',
1115             '    const %(ctype)s value)',
1116             '{',
1117             '  if (!msg->%(name)s_set || off < 0 || off >= msg->%(name)s_length)',
1118             '    return (-1);\n',
1119             '  {' ]
1120         code = TranslateList(code, self.GetTranslation())
1121
1122         codearrayassign = self._entry.CodeArrayAssign(
1123             'msg->%(name)s_data[off]' % self.GetTranslation(), 'value')
1124         code += map(lambda x: '    ' + x, codearrayassign)
1125
1126         code += TranslateList([
1127             '  }',
1128             '  return (0);',
1129             '}' ], self.GetTranslation())
1130
1131         return code
1132
1133     def CodeAdd(self):
1134         codearrayadd = self._entry.CodeArrayAdd(
1135             'msg->%(name)s_data[msg->%(name)s_length - 1]' % self.GetTranslation(),
1136             'value')
1137         code = [
1138             'static int',
1139             '%(parent_name)s_%(name)s_expand_to_hold_more('
1140             'struct %(parent_name)s *msg)',
1141             '{',
1142             '  int tobe_allocated = msg->%(name)s_num_allocated;',
1143             '  %(ctype)s* new_data = NULL;',
1144             '  tobe_allocated = !tobe_allocated ? 1 : tobe_allocated << 1;',
1145             '  new_data = (%(ctype)s*) realloc(msg->%(name)s_data,',
1146             '      tobe_allocated * sizeof(%(ctype)s));',
1147             '  if (new_data == NULL)',
1148             '    return -1;',
1149             '  msg->%(name)s_data = new_data;',
1150             '  msg->%(name)s_num_allocated = tobe_allocated;',
1151             '  return 0;'
1152             '}',
1153             '',
1154             '%(ctype)s %(optpointer)s',
1155             '%(parent_name)s_%(name)s_add('
1156             'struct %(parent_name)s *msg%(optaddarg)s)',
1157             '{',
1158             '  if (++msg->%(name)s_length >= msg->%(name)s_num_allocated) {',
1159             '    if (%(parent_name)s_%(name)s_expand_to_hold_more(msg)<0)',
1160             '      goto error;',
1161             '  }' ]
1162
1163         code = TranslateList(code, self.GetTranslation())
1164
1165         code += map(lambda x: '  ' + x, codearrayadd)
1166
1167         code += TranslateList([
1168             '  msg->%(name)s_set = 1;',
1169             '  return %(optreference)s(msg->%(name)s_data['
1170             'msg->%(name)s_length - 1]);',
1171             'error:',
1172             '  --msg->%(name)s_length;',
1173             '  return (NULL);',
1174             '}' ], self.GetTranslation())
1175
1176         return code
1177
1178     def CodeComplete(self, structname, var_name):
1179         self._index = 'i'
1180         tmp = self._entry.CodeComplete(structname, self._entry.GetVarName(var_name))
1181         # skip the whole loop if there is nothing to check
1182         if not tmp:
1183             return []
1184
1185         translate = self.GetTranslation({ 'structname' : structname })
1186         code = [
1187             '{',
1188             '  int i;',
1189             '  for (i = 0; i < %(structname)s->%(name)s_length; ++i) {' ]
1190
1191         code = TranslateList(code, translate)
1192
1193         code += map(lambda x: '    ' + x, tmp)
1194
1195         code += [
1196             '  }',
1197             '}' ]
1198
1199         return code
1200
1201     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
1202         translate = self.GetTranslation({ 'var' : var_name,
1203                                           'buf' : buf,
1204                                           'tag' : tag_name,
1205                                           'init' : self._entry.GetInitializer()})
1206         code = [
1207             'if (%(var)s->%(name)s_length >= %(var)s->%(name)s_num_allocated &&',
1208             '    %(parent_name)s_%(name)s_expand_to_hold_more(%(var)s) < 0) {',
1209             '  puts("HEY NOW");',
1210             '  return (-1);',
1211             '}']
1212
1213         # the unmarshal code directly returns
1214         code = TranslateList(code, translate)
1215
1216         self._index = '%(var)s->%(name)s_length' % translate
1217         code += self._entry.CodeUnmarshal(buf, tag_name,
1218                                         self._entry.GetVarName(var_name),
1219                                         self._entry.GetVarLen(var_name))
1220
1221         code += [ '++%(var)s->%(name)s_length;' % translate ]
1222
1223         return code
1224
1225     def CodeMarshal(self, buf, tag_name, var_name, var_len):
1226         code = ['{',
1227                 '  int i;',
1228                 '  for (i = 0; i < %(var)s->%(name)s_length; ++i) {' ]
1229
1230         self._index = 'i'
1231         code += self._entry.CodeMarshal(buf, tag_name,
1232                                         self._entry.GetVarName(var_name),
1233                                         self._entry.GetVarLen(var_name))
1234         code += ['  }',
1235                  '}'
1236                  ]
1237
1238         code = "\n".join(code) % self.GetTranslation({ 'var' : var_name })
1239
1240         return code.split('\n')
1241
1242     def CodeClear(self, structname):
1243         translate = self.GetTranslation({ 'structname' : structname })
1244         codearrayfree = self._entry.CodeArrayFree(
1245             '%(structname)s->%(name)s_data[i]' % self.GetTranslation(
1246             { 'structname' : structname } ))
1247
1248         code = [ 'if (%(structname)s->%(name)s_set == 1) {' ]
1249
1250         if codearrayfree:
1251             code += [
1252                 '  int i;',
1253                 '  for (i = 0; i < %(structname)s->%(name)s_length; ++i) {' ]
1254
1255         code = TranslateList(code, translate)
1256
1257         if codearrayfree:
1258             code += map(lambda x: '    ' + x, codearrayfree)
1259             code += [
1260                 '  }' ]
1261
1262         code += TranslateList([
1263                  '  free(%(structname)s->%(name)s_data);',
1264                  '  %(structname)s->%(name)s_data = NULL;',
1265                  '  %(structname)s->%(name)s_set = 0;',
1266                  '  %(structname)s->%(name)s_length = 0;',
1267                  '  %(structname)s->%(name)s_num_allocated = 0;',
1268                  '}'
1269                  ], translate)
1270
1271         return code
1272
1273     def CodeInitialize(self, name):
1274         code  = ['%s->%s_data = NULL;' % (name, self._name),
1275                  '%s->%s_length = 0;' % (name, self._name),
1276                  '%s->%s_num_allocated = 0;' % (name, self._name)]
1277         return code
1278
1279     def CodeFree(self, structname):
1280         code = self.CodeClear(structname);
1281
1282         code += TranslateList([
1283             'free(%(structname)s->%(name)s_data);' ],
1284                               self.GetTranslation({'structname' : structname }))
1285
1286         return code
1287
1288     def Declaration(self):
1289         dcl  = ['%s *%s_data;' % (self._ctype, self._name),
1290                 'int %s_length;' % self._name,
1291                 'int %s_num_allocated;' % self._name ]
1292
1293         return dcl
1294
1295 def NormalizeLine(line):
1296     global white
1297     global cppcomment
1298
1299     line = cppcomment.sub('', line)
1300     line = line.strip()
1301     line = white.sub(' ', line)
1302
1303     return line
1304
1305 def ProcessOneEntry(factory, newstruct, entry):
1306     optional = 0
1307     array = 0
1308     entry_type = ''
1309     name = ''
1310     tag = ''
1311     tag_set = None
1312     separator = ''
1313     fixed_length = ''
1314
1315     tokens = entry.split(' ')
1316     while tokens:
1317         token = tokens[0]
1318         tokens = tokens[1:]
1319
1320         if not entry_type:
1321             if not optional and token == 'optional':
1322                 optional = 1
1323                 continue
1324
1325             if not array and token == 'array':
1326                 array = 1
1327                 continue
1328
1329         if not entry_type:
1330             entry_type = token
1331             continue
1332
1333         if not name:
1334             res = re.match(r'^([^\[\]]+)(\[.*\])?$', token)
1335             if not res:
1336                  raise RpcGenError(
1337                      'Cannot parse name: \"%s\" '
1338                      'around line %d' % (entry, line_count))
1339             name = res.group(1)
1340             fixed_length = res.group(2)
1341             if fixed_length:
1342                 fixed_length = fixed_length[1:-1]
1343             continue
1344
1345         if not separator:
1346             separator = token
1347             if separator != '=':
1348                  raise RpcGenError('Expected "=" after name \"%s\" got %s'
1349                                    % (name, token))
1350             continue
1351
1352         if not tag_set:
1353             tag_set = 1
1354             if not re.match(r'^(0x)?[0-9]+$', token):
1355                 raise RpcGenError('Expected tag number: \"%s\"' % entry)
1356             tag = int(token, 0)
1357             continue
1358
1359         raise RpcGenError('Cannot parse \"%s\"' % entry)
1360
1361     if not tag_set:
1362         raise RpcGenError('Need tag number: \"%s\"' % entry)
1363
1364     # Create the right entry
1365     if entry_type == 'bytes':
1366         if fixed_length:
1367             newentry = factory.EntryBytes(entry_type, name, tag, fixed_length)
1368         else:
1369             newentry = factory.EntryVarBytes(entry_type, name, tag)
1370     elif entry_type == 'int' and not fixed_length:
1371         newentry = factory.EntryInt(entry_type, name, tag)
1372     elif entry_type == 'int64' and not fixed_length:
1373         newentry = factory.EntryInt(entry_type, name, tag, bits=64)
1374     elif entry_type == 'string' and not fixed_length:
1375         newentry = factory.EntryString(entry_type, name, tag)
1376     else:
1377         res = structref.match(entry_type)
1378         if res:
1379             # References another struct defined in our file
1380             newentry = factory.EntryStruct(entry_type, name, tag, res.group(1))
1381         else:
1382             raise RpcGenError('Bad type: "%s" in "%s"' % (entry_type, entry))
1383
1384     structs = []
1385
1386     if optional:
1387         newentry.MakeOptional()
1388     if array:
1389         newentry.MakeArray()
1390
1391     newentry.SetStruct(newstruct)
1392     newentry.SetLineCount(line_count)
1393     newentry.Verify()
1394
1395     if array:
1396         # We need to encapsulate this entry into a struct
1397         newname = newentry.Name()+ '_array'
1398
1399         # Now borgify the new entry.
1400         newentry = factory.EntryArray(newentry)
1401         newentry.SetStruct(newstruct)
1402         newentry.SetLineCount(line_count)
1403         newentry.MakeArray()
1404
1405     newstruct.AddEntry(newentry)
1406
1407     return structs
1408
1409 def ProcessStruct(factory, data):
1410     tokens = data.split(' ')
1411
1412     # First three tokens are: 'struct' 'name' '{'
1413     newstruct = factory.Struct(tokens[1])
1414
1415     inside = ' '.join(tokens[3:-1])
1416
1417     tokens = inside.split(';')
1418
1419     structs = []
1420
1421     for entry in tokens:
1422         entry = NormalizeLine(entry)
1423         if not entry:
1424             continue
1425
1426         # It's possible that new structs get defined in here
1427         structs.extend(ProcessOneEntry(factory, newstruct, entry))
1428
1429     structs.append(newstruct)
1430     return structs
1431
1432 def GetNextStruct(file):
1433     global line_count
1434     global cppdirect
1435
1436     got_struct = 0
1437
1438     processed_lines = []
1439
1440     have_c_comment = 0
1441     data = ''
1442     while 1:
1443         line = file.readline()
1444         if not line:
1445             break
1446
1447         line_count += 1
1448         line = line[:-1]
1449
1450         if not have_c_comment and re.search(r'/\*', line):
1451             if re.search(r'/\*.*?\*/', line):
1452                 line = re.sub(r'/\*.*?\*/', '', line)
1453             else:
1454                 line = re.sub(r'/\*.*$', '', line)
1455                 have_c_comment = 1
1456
1457         if have_c_comment:
1458             if not re.search(r'\*/', line):
1459                 continue
1460             have_c_comment = 0
1461             line = re.sub(r'^.*\*/', '', line)
1462
1463         line = NormalizeLine(line)
1464
1465         if not line:
1466             continue
1467
1468         if not got_struct:
1469             if re.match(r'#include ["<].*[>"]', line):
1470                 cppdirect.append(line)
1471                 continue
1472
1473             if re.match(r'^#(if( |def)|endif)', line):
1474                 cppdirect.append(line)
1475                 continue
1476
1477             if re.match(r'^#define', line):
1478                 headerdirect.append(line)
1479                 continue
1480
1481             if not structdef.match(line):
1482                 raise RpcGenError('Missing struct on line %d: %s'
1483                                   % (line_count, line))
1484             else:
1485                 got_struct = 1
1486                 data += line
1487             continue
1488
1489         # We are inside the struct
1490         tokens = line.split('}')
1491         if len(tokens) == 1:
1492             data += ' ' + line
1493             continue
1494
1495         if len(tokens[1]):
1496             raise RpcGenError('Trailing garbage after struct on line %d'
1497                               % line_count)
1498
1499         # We found the end of the struct
1500         data += ' %s}' % tokens[0]
1501         break
1502
1503     # Remove any comments, that might be in there
1504     data = re.sub(r'/\*.*\*/', '', data)
1505
1506     return data
1507
1508
1509 def Parse(factory, file):
1510     """
1511     Parses the input file and returns C code and corresponding header file.
1512     """
1513
1514     entities = []
1515
1516     while 1:
1517         # Just gets the whole struct nicely formatted
1518         data = GetNextStruct(file)
1519
1520         if not data:
1521             break
1522
1523         entities.extend(ProcessStruct(factory, data))
1524
1525     return entities
1526
1527 class CCodeGenerator:
1528     def __init__(self):
1529         pass
1530
1531     def GuardName(self, name):
1532         # Use the complete provided path to the input file, with all
1533         # non-identifier characters replaced with underscores, to
1534         # reduce the chance of a collision between guard macros.
1535         return '_' + nonident.sub('_', name).upper() + '_'
1536
1537     def HeaderPreamble(self, name):
1538         guard = self.GuardName(name)
1539         pre = (
1540             '/*\n'
1541             ' * Automatically generated from %s\n'
1542             ' */\n\n'
1543             '#ifndef %s\n'
1544             '#define %s\n\n' ) % (
1545             name, guard, guard)
1546
1547         for statement in headerdirect:
1548             pre += '%s\n' % statement
1549         if headerdirect:
1550             pre += '\n'
1551
1552         pre += (
1553             '#include <event2/util.h> /* for ev_uint*_t */\n'
1554             '#include <event2/rpc.h>\n'
1555         )
1556
1557         return pre
1558
1559     def HeaderPostamble(self, name):
1560         guard = self.GuardName(name)
1561         return '#endif  /* %s */' % guard
1562
1563     def BodyPreamble(self, name, header_file):
1564         global _NAME
1565         global _VERSION
1566
1567         slash = header_file.rfind('/')
1568         if slash != -1:
1569             header_file = header_file[slash+1:]
1570
1571         pre = ( '/*\n'
1572                 ' * Automatically generated from %s\n'
1573                 ' * by %s/%s.  DO NOT EDIT THIS FILE.\n'
1574                 ' */\n\n' ) % (name, _NAME, _VERSION)
1575         pre += ( '#include <stdlib.h>\n'
1576                  '#include <string.h>\n'
1577                  '#include <assert.h>\n'
1578                  '#include <event2/event-config.h>\n'
1579                  '#include <event2/event.h>\n'
1580                  '#include <event2/buffer.h>\n'
1581                  '#include <event2/tag.h>\n\n'
1582                  '#ifdef _EVENT___func__\n'
1583                  '#define __func__ _EVENT___func__\n'
1584                  '#endif\n\n'
1585                  )
1586
1587         for statement in cppdirect:
1588             pre += '%s\n' % statement
1589
1590         pre += '\n#include "%s"\n\n' % header_file
1591
1592         pre += 'void event_warn(const char *fmt, ...);\n'
1593         pre += 'void event_warnx(const char *fmt, ...);\n\n'
1594
1595         return pre
1596
1597     def HeaderFilename(self, filename):
1598         return '.'.join(filename.split('.')[:-1]) + '.h'
1599
1600     def CodeFilename(self, filename):
1601         return '.'.join(filename.split('.')[:-1]) + '.gen.c'
1602
1603     def Struct(self, name):
1604         return StructCCode(name)
1605
1606     def EntryBytes(self, entry_type, name, tag, fixed_length):
1607         return EntryBytes(entry_type, name, tag, fixed_length)
1608
1609     def EntryVarBytes(self, entry_type, name, tag):
1610         return EntryVarBytes(entry_type, name, tag)
1611
1612     def EntryInt(self, entry_type, name, tag, bits=32):
1613         return EntryInt(entry_type, name, tag, bits)
1614
1615     def EntryString(self, entry_type, name, tag):
1616         return EntryString(entry_type, name, tag)
1617
1618     def EntryStruct(self, entry_type, name, tag, struct_name):
1619         return EntryStruct(entry_type, name, tag, struct_name)
1620
1621     def EntryArray(self, entry):
1622         return EntryArray(entry)
1623
1624 class Usage(RpcGenError):
1625     def __init__(self, argv0):
1626         RpcGenError.__init__("usage: %s input.rpc [[output.h] output.c]"
1627                              % argv0)
1628
1629 class CommandLine:
1630     def __init__(self, argv):
1631         """Initialize a command-line to launch event_rpcgen, as if
1632            from a command-line with CommandLine(sys.argv).  If you're
1633            calling this directly, remember to provide a dummy value
1634            for sys.argv[0]
1635         """
1636         self.filename = None
1637         self.header_file = None
1638         self.impl_file = None
1639         self.factory = CCodeGenerator()
1640
1641         if len(argv) < 2 or len(argv) > 4:
1642             raise Usage(argv[0])
1643
1644         self.filename = argv[1].replace('\\', '/')
1645         if len(argv) == 3:
1646             self.impl_file = argv[2].replace('\\', '/')
1647         if len(argv) == 4:
1648             self.header_file = argv[2].replace('\\', '/')
1649             self.impl_file = argv[3].replace('\\', '/')
1650
1651         if not self.filename:
1652             raise Usage(argv[0])
1653
1654         if not self.impl_file:
1655             self.impl_file = self.factory.CodeFilename(self.filename)
1656
1657         if not self.header_file:
1658             self.header_file = self.factory.HeaderFilename(self.impl_file)
1659
1660         if not self.impl_file.endswith('.c'):
1661             raise RpcGenError("can only generate C implementation files")
1662         if not self.header_file.endswith('.h'):
1663             raise RpcGenError("can only generate C header files")
1664
1665     def run(self):
1666         filename = self.filename
1667         header_file = self.header_file
1668         impl_file = self.impl_file
1669         factory = self.factory
1670
1671         print >>sys.stderr, 'Reading \"%s\"' % filename
1672
1673         fp = open(filename, 'r')
1674         entities = Parse(factory, fp)
1675         fp.close()
1676
1677         print >>sys.stderr, '... creating "%s"' % header_file
1678         header_fp = open(header_file, 'w')
1679         print >>header_fp, factory.HeaderPreamble(filename)
1680
1681         # Create forward declarations: allows other structs to reference
1682         # each other
1683         for entry in entities:
1684             entry.PrintForwardDeclaration(header_fp)
1685         print >>header_fp, ''
1686
1687         for entry in entities:
1688             entry.PrintTags(header_fp)
1689             entry.PrintDeclaration(header_fp)
1690         print >>header_fp, factory.HeaderPostamble(filename)
1691         header_fp.close()
1692
1693         print >>sys.stderr, '... creating "%s"' % impl_file
1694         impl_fp = open(impl_file, 'w')
1695         print >>impl_fp, factory.BodyPreamble(filename, header_file)
1696         for entry in entities:
1697             entry.PrintCode(impl_fp)
1698         impl_fp.close()
1699
1700 if __name__ == '__main__':
1701     try:
1702         CommandLine(sys.argv).run()
1703         sys.exit(0)
1704
1705     except RpcGenError, e:
1706         print >>sys.stderr, e
1707         sys.exit(1)
1708
1709     except EnvironmentError, e:
1710         if e.filename and e.strerror:
1711             print >>sys.stderr, "%s: %s" % (e.filename, e.strerror)
1712             sys.exit(1)
1713         elif e.strerror:
1714             print >> sys.stderr, e.strerror
1715             sys.exit(1)
1716         else:
1717             raise