ppapi/generators/idl_c_proto.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """ Generator for C style prototypes and definitions """
   7
   8 import glob
   9 import os
  10 import sys
  11
  12 from idl_log import ErrOut, InfoOut, WarnOut
  13 from idl_node import IDLNode
  14 from idl_ast import IDLAst
  15 from idl_option import GetOption, Option, ParseOptions
  16 from idl_parser import ParseFiles
  17
  18 Option('cgen_debug', 'Debug generate.')
  19
  20 class CGenError(Exception):
  21   def __init__(self, msg):
  22     self.value = msg
  23
  24   def __str__(self):
  25     return repr(self.value)
  26
  27
  28 def CommentLines(lines, tabs=0):
  29   # Generate a C style comment block by prepending the block with '<tab>/*'
  30   # and adding a '<tab> *' per line.
  31   tab = '  ' * tabs
  32
  33   out = '%s/*' % tab + ('\n%s *' % tab).join(lines)
  34
  35   # Add a terminating ' */' unless the last line is blank which would mean it
  36   # already has ' *'
  37   if not lines[-1]:
  38     out += '/\n'
  39   else:
  40     out += ' */\n'
  41   return out
  42
  43 def Comment(node, prefix=None, tabs=0):
  44   # Generate a comment block from the provided Comment node.
  45   comment = node.GetName()
  46   lines = comment.split('\n')
  47
  48   # If an option prefix is provided, then prepend that to the comment
  49   # for this node.
  50   if prefix:
  51     prefix_lines = prefix.split('\n')
  52     # If both the prefix and comment start with a blank line ('*') remove
  53     # the extra one.
  54     if prefix_lines[0] == '*' and lines[0] == '*':
  55       lines = prefix_lines + lines[1:]
  56     else:
  57       lines = prefix_lines + lines;
  58   return CommentLines(lines, tabs)
  59
  60 def GetNodeComments(node, tabs=0):
  61   # Generate a comment block joining all comment nodes which are children of
  62   # the provided node.
  63   comment_txt = ''
  64   for doc in node.GetListOf('Comment'):
  65     comment_txt += Comment(doc, tabs=tabs)
  66   return comment_txt
  67
  68
  69 class CGen(object):
  70   # TypeMap
  71   #
  72   # TypeMap modifies how an object is stored or passed, for example pointers
  73   # are passed as 'const' if they are 'in' parameters, and structures are
  74   # preceeded by the keyword 'struct' as well as using a pointer.
  75   #
  76   TypeMap = {
  77     'Array': {
  78       'in': 'const %s',
  79       'inout': '%s',
  80       'out': '%s*',
  81       'store': '%s',
  82       'return': '%s',
  83       'ref': '%s*'
  84     },
  85     'Callspec': {
  86       'in': '%s',
  87       'inout': '%s',
  88       'out': '%s',
  89       'store': '%s',
  90       'return': '%s'
  91     },
  92     'Enum': {
  93       'in': '%s',
  94       'inout': '%s*',
  95       'out': '%s*',
  96       'store': '%s',
  97       'return': '%s'
  98     },
  99     'Interface': {
 100       'in': 'const %s*',
 101       'inout': '%s*',
 102       'out': '%s**',
 103       'return': '%s*',
 104       'store': '%s*'
 105     },
 106     'Struct': {
 107       'in': 'const %s*',
 108       'inout': '%s*',
 109       'out': '%s*',
 110       'return': ' %s*',
 111       'store': '%s',
 112       'ref': '%s*'
 113     },
 114     'blob_t': {
 115       'in': 'const %s',
 116       'inout': '%s',
 117       'out': '%s',
 118       'return': '%s',
 119       'store': '%s'
 120     },
 121     'mem_t': {
 122       'in': 'const %s',
 123       'inout': '%s',
 124       'out': '%s',
 125       'return': '%s',
 126       'store': '%s'
 127     },
 128     'mem_ptr_t': {
 129       'in': 'const %s',
 130       'inout': '%s',
 131       'out': '%s',
 132       'return': '%s',
 133       'store': '%s'
 134     },
 135     'str_t': {
 136       'in': 'const %s',
 137       'inout': '%s',
 138       'out': '%s',
 139       'return': 'const %s',
 140       'store': '%s'
 141     },
 142     'cstr_t': {
 143       'in': '%s',
 144       'inout': '%s*',
 145       'out': '%s*',
 146       'return': '%s',
 147       'store': '%s'
 148     },
 149     'TypeValue': {
 150       'in': '%s',
 151       'constptr_in': 'const %s*',  # So we can use const* for PP_Var sometimes.
 152       'inout': '%s*',
 153       'out': '%s*',
 154       'return': '%s',
 155       'store': '%s'
 156     },
 157   }
 158
 159
 160   #
 161   # RemapName
 162   #
 163   # A diction array of PPAPI types that are converted to language specific
 164   # types before being returned by by the C generator
 165   #
 166   RemapName = {
 167   'blob_t': 'void**',
 168   'float_t': 'float',
 169   'double_t': 'double',
 170   'handle_t': 'int',
 171   'mem_t': 'void*',
 172   'mem_ptr_t': 'void**',
 173   'str_t': 'char*',
 174   'cstr_t': 'const char*',
 175   'interface_t' : 'const void*'
 176   }
 177
 178   # Tell how to handle pointers to GL types.
 179   for gltype in ['GLbitfield', 'GLboolean', 'GLbyte', 'GLclampf',
 180                  'GLclampx', 'GLenum', 'GLfixed', 'GLfloat', 'GLint',
 181                  'GLintptr', 'GLshort', 'GLsizei', 'GLsizeiptr',
 182                  'GLubyte', 'GLuint', 'GLushort']:
 183     ptrtype = gltype + '_ptr_t'
 184     TypeMap[ptrtype] = {
 185       'in': 'const %s',
 186       'inout': '%s',
 187       'out': '%s',
 188       'return': 'const %s',
 189       'store': '%s'
 190     }
 191     RemapName[ptrtype] = '%s*' % gltype
 192
 193   def __init__(self):
 194     self.dbg_depth = 0
 195
 196   #
 197   # Debug Logging functions
 198   #
 199   def Log(self, txt):
 200     if not GetOption('cgen_debug'): return
 201     tabs = '  ' * self.dbg_depth
 202     print '%s%s' % (tabs, txt)
 203
 204   def LogEnter(self, txt):
 205     if txt: self.Log(txt)
 206     self.dbg_depth += 1
 207
 208   def LogExit(self, txt):
 209     self.dbg_depth -= 1
 210     if txt: self.Log(txt)
 211
 212
 213   def GetDefine(self, name, value):
 214     out = '#define %s %s' % (name, value)
 215     if len(out) > 80:
 216       out = '#define %s \\\n    %s' % (name, value)
 217     return '%s\n' % out
 218
 219   #
 220   # Interface strings
 221   #
 222   def GetMacroHelper(self, node):
 223     macro = node.GetProperty('macro')
 224     if macro: return macro
 225     name = node.GetName()
 226     name = name.upper()
 227     return "%s_INTERFACE" % name
 228
 229   def GetInterfaceMacro(self, node, version = None):
 230     name = self.GetMacroHelper(node)
 231     if version is None:
 232       return name
 233     return '%s_%s' % (name, str(version).replace('.', '_'))
 234
 235   def GetInterfaceString(self, node, version = None):
 236     # If an interface name is specified, use that
 237     name = node.GetProperty('iname')
 238     if not name:
 239       # Otherwise, the interface name is the object's name
 240       # With '_Dev' replaced by '(Dev)' if it's a Dev interface.
 241       name = node.GetName()
 242       if name.endswith('_Dev'):
 243         name = '%s(Dev)' % name[:-4]
 244     if version is None:
 245       return name
 246     return "%s;%s" % (name, version)
 247
 248
 249   #
 250   # Return the array specification of the object.
 251   #
 252   def GetArraySpec(self, node):
 253     assert(node.cls == 'Array')
 254     fixed = node.GetProperty('FIXED')
 255     if fixed:
 256       return '[%s]' % fixed
 257     else:
 258       return '[]'
 259
 260   #
 261   # GetTypeName
 262   #
 263   # For any valid 'typed' object such as Member or Typedef
 264   # the typenode object contains the typename
 265   #
 266   # For a given node return the type name by passing mode.
 267   #
 268   def GetTypeName(self, node, release, prefix=''):
 269     self.LogEnter('GetTypeName of %s rel=%s' % (node, release))
 270
 271     # For Members, Params, and Typedefs get the type it refers to otherwise
 272     # the node in question is it's own type (struct, union etc...)
 273     if node.IsA('Member', 'Param', 'Typedef'):
 274       typeref = node.GetType(release)
 275     else:
 276       typeref = node
 277
 278     if typeref is None:
 279       node.Error('No type at release %s.' % release)
 280       raise CGenError('No type for %s' % node)
 281
 282     # If the type is a (BuiltIn) Type then return it's name
 283     # remapping as needed
 284     if typeref.IsA('Type'):
 285       name = CGen.RemapName.get(typeref.GetName(), None)
 286       if name is None: name = typeref.GetName()
 287       name = '%s%s' % (prefix, name)
 288
 289     # For Interfaces, use the name + version
 290     elif typeref.IsA('Interface'):
 291       rel = typeref.first_release[release]
 292       name = 'struct %s%s' % (prefix, self.GetStructName(typeref, rel, True))
 293
 294     # For structures, preceed with 'struct' or 'union' as appropriate
 295     elif typeref.IsA('Struct'):
 296       if typeref.GetProperty('union'):
 297         name = 'union %s%s' % (prefix, typeref.GetName())
 298       else:
 299         name = 'struct %s%s' % (prefix, typeref.GetName())
 300
 301     # If it's an enum, or typedef then return the Enum's name
 302     elif typeref.IsA('Enum', 'Typedef'):
 303       if not typeref.LastRelease(release):
 304         first = node.first_release[release]
 305         ver = '_' + node.GetVersion(first).replace('.','_')
 306       else:
 307         ver = ''
 308       # The enum may have skipped having a typedef, we need prefix with 'enum'.
 309       if typeref.GetProperty('notypedef'):
 310         name = 'enum %s%s%s' % (prefix, typeref.GetName(), ver)
 311       else:
 312         name = '%s%s%s' % (prefix, typeref.GetName(), ver)
 313
 314     else:
 315       raise RuntimeError('Getting name of non-type %s.' % node)
 316     self.LogExit('GetTypeName %s is %s' % (node, name))
 317     return name
 318
 319
 320   #
 321   # GetRootType
 322   #
 323   # For a given node return basic type of that object.  This is
 324   # either a 'Type', 'Callspec', or 'Array'
 325   #
 326   def GetRootTypeMode(self, node, release, mode):
 327     self.LogEnter('GetRootType of %s' % node)
 328     # If it has an array spec, then treat it as an array regardless of type
 329     if node.GetOneOf('Array'):
 330       rootType = 'Array'
 331     # Or if it has a callspec, treat it as a function
 332     elif node.GetOneOf('Callspec'):
 333       rootType, mode = self.GetRootTypeMode(node.GetType(release), release,
 334                                             'return')
 335
 336     # If it's a plain typedef, try that object's root type
 337     elif node.IsA('Member', 'Param', 'Typedef'):
 338       rootType, mode = self.GetRootTypeMode(node.GetType(release),
 339                                             release, mode)
 340
 341     # If it's an Enum, then it's normal passing rules
 342     elif node.IsA('Enum'):
 343       rootType = node.cls
 344
 345     # If it's an Interface or Struct, we may be passing by value
 346     elif node.IsA('Interface', 'Struct'):
 347       if mode == 'return':
 348         if node.GetProperty('returnByValue'):
 349           rootType = 'TypeValue'
 350         else:
 351           rootType = node.cls
 352       else:
 353         if node.GetProperty('passByValue'):
 354           rootType = 'TypeValue'
 355         else:
 356           rootType = node.cls
 357
 358     # If it's an Basic Type, check if it's a special type
 359     elif node.IsA('Type'):
 360       if node.GetName() in CGen.TypeMap:
 361         rootType = node.GetName()
 362       else:
 363         rootType = 'TypeValue'
 364     else:
 365       raise RuntimeError('Getting root type of non-type %s.' % node)
 366     self.LogExit('RootType is "%s"' % rootType)
 367     return rootType, mode
 368
 369
 370   def GetTypeByMode(self, node, release, mode):
 371     self.LogEnter('GetTypeByMode of %s mode=%s release=%s' %
 372                   (node, mode, release))
 373     name = self.GetTypeName(node, release)
 374     ntype, mode = self.GetRootTypeMode(node, release, mode)
 375     out = CGen.TypeMap[ntype][mode] % name
 376     self.LogExit('GetTypeByMode %s = %s' % (node, out))
 377     return out
 378
 379
 380   # Get the passing mode of the object (in, out, inout).
 381   def GetParamMode(self, node):
 382     self.Log('GetParamMode for %s' % node)
 383     if node.GetProperty('in'): return 'in'
 384     if node.GetProperty('out'): return 'out'
 385     if node.GetProperty('inout'): return 'inout'
 386     if node.GetProperty('constptr_in'): return 'constptr_in'
 387     return 'return'
 388
 389   #
 390   # GetComponents
 391   #
 392   # Returns the signature components of an object as a tuple of
 393   # (rtype, name, arrays, callspec) where:
 394   #   rtype - The store or return type of the object.
 395   #   name - The name of the object.
 396   #   arrays - A list of array dimensions as [] or [<fixed_num>].
 397   #   args -  None if not a function, otherwise a list of parameters.
 398   #
 399   def GetComponents(self, node, release, mode):
 400     self.LogEnter('GetComponents mode %s for %s %s' % (mode, node, release))
 401
 402     # Generate passing type by modifying root type
 403     rtype = self.GetTypeByMode(node, release, mode)
 404     # If this is an array output, change it from type* foo[] to type** foo.
 405     # type* foo[] means an array of pointers to type, which is confusing.
 406     arrayspec = [self.GetArraySpec(array) for array in node.GetListOf('Array')]
 407     if mode == 'out' and len(arrayspec) == 1 and arrayspec[0] == '[]':
 408       rtype += '*'
 409       del arrayspec[0]
 410
 411     if node.IsA('Enum', 'Interface', 'Struct'):
 412       rname = node.GetName()
 413     else:
 414       rname = node.GetType(release).GetName()
 415
 416     if rname in CGen.RemapName:
 417       rname = CGen.RemapName[rname]
 418     if '%' in rtype:
 419       rtype = rtype % rname
 420     name = node.GetName()
 421     callnode = node.GetOneOf('Callspec')
 422     if callnode:
 423       callspec = []
 424       for param in callnode.GetListOf('Param'):
 425         if not param.IsRelease(release):
 426           continue
 427         mode = self.GetParamMode(param)
 428         ptype, pname, parray, pspec = self.GetComponents(param, release, mode)
 429         callspec.append((ptype, pname, parray, pspec))
 430     else:
 431       callspec = None
 432
 433     self.LogExit('GetComponents: %s, %s, %s, %s' %
 434                  (rtype, name, arrayspec, callspec))
 435     return (rtype, name, arrayspec, callspec)
 436
 437
 438   def Compose(self, rtype, name, arrayspec, callspec, prefix, func_as_ptr,
 439               include_name, unsized_as_ptr):
 440     self.LogEnter('Compose: %s %s' % (rtype, name))
 441     arrayspec = ''.join(arrayspec)
 442
 443     # Switch unsized array to a ptr. NOTE: Only last element can be unsized.
 444     if unsized_as_ptr and arrayspec[-2:] == '[]':
 445       prefix +=  '*'
 446       arrayspec=arrayspec[:-2]
 447
 448     if not include_name:
 449       name = prefix + arrayspec
 450     else:
 451       name = prefix + name + arrayspec
 452     if callspec is None:
 453       out = '%s %s' % (rtype, name)
 454     else:
 455       params = []
 456       for ptype, pname, parray, pspec in callspec:
 457         params.append(self.Compose(ptype, pname, parray, pspec, '', True,
 458                                    include_name=True,
 459                                    unsized_as_ptr=unsized_as_ptr))
 460       if func_as_ptr:
 461         name = '(*%s)' % name
 462       if not params:
 463         params = ['void']
 464       out = '%s %s(%s)' % (rtype, name, ', '.join(params))
 465     self.LogExit('Exit Compose: %s' % out)
 466     return out
 467
 468   #
 469   # GetSignature
 470   #
 471   # Returns the 'C' style signature of the object
 472   #  prefix - A prefix for the object's name
 473   #  func_as_ptr - Formats a function as a function pointer
 474   #  include_name - If true, include member name in the signature.
 475   #                 If false, leave it out. In any case, prefix is always
 476   #                 included.
 477   #  include_version - if True, include version in the member name
 478   #
 479   def GetSignature(self, node, release, mode, prefix='', func_as_ptr=True,
 480                    include_name=True, include_version=False):
 481     self.LogEnter('GetSignature %s %s as func=%s' %
 482                   (node, mode, func_as_ptr))
 483     rtype, name, arrayspec, callspec = self.GetComponents(node, release, mode)
 484     if include_version:
 485       name = self.GetStructName(node, release, True)
 486
 487     # If not a callspec (such as a struct) use a ptr instead of []
 488     unsized_as_ptr = not callspec
 489
 490     out = self.Compose(rtype, name, arrayspec, callspec, prefix,
 491                        func_as_ptr, include_name, unsized_as_ptr)
 492
 493     self.LogExit('Exit GetSignature: %s' % out)
 494     return out
 495
 496   # Define a Typedef.
 497   def DefineTypedef(self, node, releases, prefix='', comment=False):
 498     __pychecker__ = 'unusednames=comment'
 499     build_list = node.GetUniqueReleases(releases)
 500
 501     out = 'typedef %s;\n' % self.GetSignature(node, build_list[-1], 'return',
 502                                               prefix, True,
 503                                               include_version=False)
 504     # Version mangle any other versions
 505     for index, rel in enumerate(build_list[:-1]):
 506       out += '\n'
 507       out += 'typedef %s;\n' % self.GetSignature(node, rel, 'return',
 508                                                  prefix, True,
 509                                                  include_version=True)
 510     self.Log('DefineTypedef: %s' % out)
 511     return out
 512
 513   # Define an Enum.
 514   def DefineEnum(self, node, releases, prefix='', comment=False):
 515     __pychecker__ = 'unusednames=comment,releases'
 516     self.LogEnter('DefineEnum %s' % node)
 517     name = '%s%s' % (prefix, node.GetName())
 518     notypedef = node.GetProperty('notypedef')
 519     unnamed = node.GetProperty('unnamed')
 520
 521     if unnamed:
 522       out = 'enum {'
 523     elif notypedef:
 524       out = 'enum %s {' % name
 525     else:
 526       out = 'typedef enum {'
 527     enumlist = []
 528     for child in node.GetListOf('EnumItem'):
 529       value = child.GetProperty('VALUE')
 530       comment_txt = GetNodeComments(child, tabs=1)
 531       if value:
 532         item_txt = '%s%s = %s' % (prefix, child.GetName(), value)
 533       else:
 534         item_txt = '%s%s' % (prefix, child.GetName())
 535       enumlist.append('%s  %s' % (comment_txt, item_txt))
 536     self.LogExit('Exit DefineEnum')
 537
 538     if unnamed or notypedef:
 539       out = '%s\n%s\n};\n' % (out, ',\n'.join(enumlist))
 540     else:
 541       out = '%s\n%s\n} %s;\n' % (out, ',\n'.join(enumlist), name)
 542     return out
 543
 544   def DefineMember(self, node, releases, prefix='', comment=False):
 545     __pychecker__ = 'unusednames=prefix,comment'
 546     release = releases[0]
 547     self.LogEnter('DefineMember %s' % node)
 548     if node.GetProperty('ref'):
 549       out = '%s;' % self.GetSignature(node, release, 'ref', '', True)
 550     else:
 551       out = '%s;' % self.GetSignature(node, release, 'store', '', True)
 552     self.LogExit('Exit DefineMember')
 553     return out
 554
 555   def GetStructName(self, node, release, include_version=False):
 556     suffix = ''
 557     if include_version:
 558       ver_num = node.GetVersion(release)
 559       suffix = ('_%s' % ver_num).replace('.', '_')
 560     return node.GetName() + suffix
 561
 562   def DefineStructInternals(self, node, release,
 563                             include_version=False, comment=True):
 564     channel = node.GetProperty('FILE').release_map.GetChannel(release)
 565     if channel == 'dev':
 566       channel_comment = ' /* dev */'
 567     else:
 568       channel_comment = ''
 569     out = ''
 570     if node.GetProperty('union'):
 571       out += 'union %s {%s\n' % (
 572           self.GetStructName(node, release, include_version), channel_comment)
 573     else:
 574       out += 'struct %s {%s\n' % (
 575           self.GetStructName(node, release, include_version), channel_comment)
 576
 577     channel = node.GetProperty('FILE').release_map.GetChannel(release)
 578     # Generate Member Functions
 579     members = []
 580     for child in node.GetListOf('Member'):
 581       if channel == 'stable' and child.NodeIsDevOnly():
 582         continue
 583       member = self.Define(child, [release], tabs=1, comment=comment)
 584       if not member:
 585         continue
 586       members.append(member)
 587     out += '%s\n};\n' % '\n'.join(members)
 588     return out
 589
 590
 591   def DefineUnversionedInterface(self, node, rel):
 592     out = '\n'
 593     if node.GetProperty('force_struct_namespace'):
 594       # Duplicate the definition to put it in struct namespace. This
 595       # attribute is only for legacy APIs like OpenGLES2 and new APIs
 596       # must not use this. See http://crbug.com/411799
 597       out += self.DefineStructInternals(node, rel,
 598                                         include_version=False, comment=True)
 599     else:
 600       # Define an unversioned typedef for the most recent version
 601       out += 'typedef struct %s %s;\n' % (
 602         self.GetStructName(node, rel, include_version=True),
 603         self.GetStructName(node, rel, include_version=False))
 604     return out
 605
 606
 607   def DefineStruct(self, node, releases, prefix='', comment=False):
 608     __pychecker__ = 'unusednames=comment,prefix'
 609     self.LogEnter('DefineStruct %s' % node)
 610     out = ''
 611     build_list = node.GetUniqueReleases(releases)
 612
 613     newest_stable = None
 614     newest_dev = None
 615     for rel in build_list:
 616       channel = node.GetProperty('FILE').release_map.GetChannel(rel)
 617       if channel == 'stable':
 618         newest_stable = rel
 619       if channel == 'dev':
 620         newest_dev = rel
 621     last_rel = build_list[-1]
 622
 623     # TODO(bradnelson) : Bug 157017 finish multiversion support
 624     if node.IsA('Struct'):
 625       if len(build_list) != 1:
 626         node.Error('Can not support multiple versions of node.')
 627       assert len(build_list) == 1
 628       # Build the most recent one versioned, with comments
 629       out = self.DefineStructInternals(node, last_rel,
 630                                        include_version=False, comment=True)
 631
 632     if node.IsA('Interface'):
 633       # Build the most recent one versioned, with comments
 634       out = self.DefineStructInternals(node, last_rel,
 635                                        include_version=True, comment=True)
 636       if last_rel == newest_stable:
 637         out += self.DefineUnversionedInterface(node, last_rel)
 638
 639       # Build the rest without comments and with the version number appended
 640       for rel in build_list[0:-1]:
 641         channel = node.GetProperty('FILE').release_map.GetChannel(rel)
 642         # Skip dev channel interface versions that are
 643         #   Not the newest version, and
 644         #   Don't have an equivalent stable version.
 645         if channel == 'dev' and rel != newest_dev:
 646           if not node.DevInterfaceMatchesStable(rel):
 647             continue
 648         out += '\n' + self.DefineStructInternals(node, rel,
 649                                                  include_version=True,
 650                                                  comment=False)
 651         if rel == newest_stable:
 652           out += self.DefineUnversionedInterface(node, rel)
 653
 654     self.LogExit('Exit DefineStruct')
 655     return out
 656
 657
 658   #
 659   # Copyright and Comment
 660   #
 661   # Generate a comment or copyright block
 662   #
 663   def Copyright(self, node, cpp_style=False):
 664     lines = node.GetName().split('\n')
 665     if cpp_style:
 666       return '//' + '\n//'.join(filter(lambda f: f != '', lines)) + '\n'
 667     return CommentLines(lines)
 668
 669
 670   def Indent(self, data, tabs=0):
 671     """Handles indentation and 80-column line wrapping."""
 672     tab = '  ' * tabs
 673     lines = []
 674     for line in data.split('\n'):
 675       # Add indentation
 676       line = tab + line
 677       space_break = line.rfind(' ', 0, 80)
 678       if len(line) <= 80 or 'http://' in line:
 679         # Ignore normal line and URLs permitted by the style guide.
 680         lines.append(line.rstrip())
 681       elif not '(' in line and space_break >= 0:
 682         # Break long typedefs on nearest space.
 683         lines.append(line[0:space_break])
 684         lines.append('    ' + line[space_break + 1:])
 685       else:
 686         left = line.rfind('(') + 1
 687         args = line[left:].split(',')
 688         orig_args = args
 689         orig_left = left
 690         # Try to split on '(arg1)' or '(arg1, arg2)', not '()'
 691         while args[0][0] == ')':
 692           left = line.rfind('(', 0, left - 1) + 1
 693           if left == 0:  # No more parens, take the original option
 694             args = orig_args
 695             left = orig_left
 696             break
 697           args = line[left:].split(',')
 698
 699         line_max = 0
 700         for arg in args:
 701           if len(arg) > line_max: line_max = len(arg)
 702
 703         if left + line_max >= 80:
 704           indent = '%s    ' % tab
 705           args =  (',\n%s' % indent).join([arg.strip() for arg in args])
 706           lines.append('%s\n%s%s' % (line[:left], indent, args))
 707         else:
 708           indent = ' ' * (left - 1)
 709           args =  (',\n%s' % indent).join(args)
 710           lines.append('%s%s' % (line[:left], args))
 711     return '\n'.join(lines)
 712
 713
 714   # Define a top level object.
 715   def Define(self, node, releases, tabs=0, prefix='', comment=False):
 716     # If this request does not match unique release, or if the release is not
 717     # available (possibly deprecated) then skip.
 718     unique = node.GetUniqueReleases(releases)
 719     if not unique or not node.InReleases(releases):
 720       return ''
 721
 722     self.LogEnter('Define %s tab=%d prefix="%s"' % (node,tabs,prefix))
 723     declmap = dict({
 724       'Enum': CGen.DefineEnum,
 725       'Function': CGen.DefineMember,
 726       'Interface': CGen.DefineStruct,
 727       'Member': CGen.DefineMember,
 728       'Struct': CGen.DefineStruct,
 729       'Typedef': CGen.DefineTypedef
 730     })
 731
 732     out = ''
 733     func = declmap.get(node.cls, None)
 734     if not func:
 735       ErrOut.Log('Failed to define %s named %s' % (node.cls, node.GetName()))
 736     define_txt = func(self, node, releases, prefix=prefix, comment=comment)
 737
 738     comment_txt = GetNodeComments(node, tabs=0)
 739     if comment_txt and comment:
 740       out += comment_txt
 741     out += define_txt
 742
 743     indented_out = self.Indent(out, tabs)
 744     self.LogExit('Exit Define')
 745     return indented_out
 746
 747
 748 # Clean a string representing an object definition and return then string
 749 # as a single space delimited set of tokens.
 750 def CleanString(instr):
 751   instr = instr.strip()
 752   instr = instr.split()
 753   return ' '.join(instr)
 754
 755
 756 # Test a file, by comparing all it's objects, with their comments.
 757 def TestFile(filenode):
 758   cgen = CGen()
 759
 760   errors = 0
 761   for node in filenode.GetChildren()[2:]:
 762     instr = node.GetOneOf('Comment')
 763     if not instr: continue
 764     instr.Dump()
 765     instr = CleanString(instr.GetName())
 766
 767     outstr = cgen.Define(node, releases=['M14'])
 768     if GetOption('verbose'):
 769       print outstr + '\n'
 770     outstr = CleanString(outstr)
 771
 772     if instr != outstr:
 773       ErrOut.Log('Failed match of\n>>%s<<\nto:\n>>%s<<\nFor:\n' %
 774                  (instr, outstr))
 775       node.Dump(1, comments=True)
 776       errors += 1
 777   return errors
 778
 779
 780 # Build and resolve the AST and compare each file individual.
 781 def TestFiles(filenames):
 782   if not filenames:
 783     idldir = os.path.split(sys.argv[0])[0]
 784     idldir = os.path.join(idldir, 'test_cgen', '*.idl')
 785     filenames = glob.glob(idldir)
 786
 787   filenames = sorted(filenames)
 788   ast = ParseFiles(filenames)
 789
 790   total_errs = 0
 791   for filenode in ast.GetListOf('File'):
 792     errs = TestFile(filenode)
 793     if errs:
 794       ErrOut.Log('%s test failed with %d error(s).' %
 795                  (filenode.GetName(), errs))
 796       total_errs += errs
 797
 798   if total_errs:
 799     ErrOut.Log('Failed generator test.')
 800   else:
 801     InfoOut.Log('Passed generator test.')
 802   return total_errs
 803
 804 def main(args):
 805   filenames = ParseOptions(args)
 806   if GetOption('test'):
 807     return TestFiles(filenames)
 808   ast = ParseFiles(filenames)
 809   cgen = CGen()
 810   for f in ast.GetListOf('File'):
 811     if f.GetProperty('ERRORS') > 0:
 812       print 'Skipping %s' % f.GetName()
 813       continue
 814     for node in f.GetChildren()[2:]:
 815       print cgen.Define(node, ast.releases, comment=True, prefix='tst_')
 816
 817
 818 if __name__ == '__main__':
 819   sys.exit(main(sys.argv[1:]))