The Tor Browser: ipc/chromium/src/third_party/libevent/event

ipc/chromium/src/third_party/libevent/event_rpcgen.py@6474c204b198 (annotated)

ipc/chromium/src/third_party/libevent/event_rpcgen.py

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rwxr-xr-x

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 #!/usr/bin/env python2
 #
 # Copyright (c) 2005-2007 Niels Provos <provos@citi.umich.edu>
 # Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
 # All rights reserved.
 #
 # Generates marshaling code based on libevent.
 # TODO:
 # 1) use optparse to allow the strategy shell to parse options, and
 #    to allow the instantiated factory (for the specific output language)
 #    to parse remaining options
 # 2) move the globals into a class that manages execution (including the
 #    progress outputs that space stderr at the moment)
 # 3) emit other languages
 import sys
 import re
 _NAME = "event_rpcgen.py"
 _VERSION = "0.1"
 # Globals
 line_count = 0
 white = re.compile(r'\s+')
 cppcomment = re.compile(r'\/\/.*$')
 nonident = re.compile(r'[^a-zA-Z0-9_]')
 structref = re.compile(r'^struct\[([a-zA-Z_][a-zA-Z0-9_]*)\]$')
 structdef = re.compile(r'^struct +[a-zA-Z_][a-zA-Z0-9_]* *{$')
 headerdirect = []
 cppdirect = []
 def TranslateList(mylist, mydict):
     return map(lambda x: x % mydict, mylist)
 # Exception class for parse errors
 class RpcGenError(Exception):
         def __init__(self, why):
                 self.why = why
         def __str__(self):
                 return str(self.why)
 # Holds everything that makes a struct
 class Struct:
     def __init__(self, name):
         self._name = name
         self._entries = []
         self._tags = {}
         print >>sys.stderr, '  Created struct: %s' % name
     def AddEntry(self, entry):
         if self._tags.has_key(entry.Tag()):
             raise RpcGenError(
                 'Entry "%s" duplicates tag number %d from "%s" '
                 'around line %d' % (entry.Name(), entry.Tag(),
                                     self._tags[entry.Tag()], line_count))
         self._entries.append(entry)
         self._tags[entry.Tag()] = entry.Name()
         print >>sys.stderr, '    Added entry: %s' % entry.Name()
     def Name(self):
         return self._name
     def EntryTagName(self, entry):
         """Creates the name inside an enumeration for distinguishing data
         types."""
         name = "%s_%s" % (self._name, entry.Name())
         return name.upper()
     def PrintIndented(self, file, ident, code):
         """Takes an array, add indentation to each entry and prints it."""
         for entry in code:
             print >>file, '%s%s' % (ident, entry)
 class StructCCode(Struct):
     """ Knows how to generate C code for a struct """
     def __init__(self, name):
         Struct.__init__(self, name)
     def PrintTags(self, file):
         """Prints the tag definitions for a structure."""
         print >>file, '/* Tag definition for %s */' % self._name
         print >>file, 'enum %s_ {' % self._name.lower()
         for entry in self._entries:
             print >>file, '  %s=%d,' % (self.EntryTagName(entry),
                                         entry.Tag())
         print >>file, '  %s_MAX_TAGS' % (self._name.upper())
         print >>file, '};\n'
     def PrintForwardDeclaration(self, file):
         print >>file, 'struct %s;' % self._name
     def PrintDeclaration(self, file):
         print >>file, '/* Structure declaration for %s */' % self._name
         print >>file, 'struct %s_access_ {' % self._name
         for entry in self._entries:
             dcl = entry.AssignDeclaration('(*%s_assign)' % entry.Name())
             dcl.extend(
                 entry.GetDeclaration('(*%s_get)' % entry.Name()))
             if entry.Array():
                 dcl.extend(
                     entry.AddDeclaration('(*%s_add)' % entry.Name()))
             self.PrintIndented(file, '  ', dcl)
         print >>file, '};\n'
         print >>file, 'struct %s {' % self._name
         print >>file, '  struct %s_access_ *base;\n' % self._name
         for entry in self._entries:
             dcl = entry.Declaration()
             self.PrintIndented(file, '  ', dcl)
         print >>file, ''
         for entry in self._entries:
             print >>file, '  ev_uint8_t %s_set;' % entry.Name()
         print >>file, '};\n'
         print >>file, \
 """struct %(name)s *%(name)s_new(void);
 struct %(name)s *%(name)s_new_with_arg(void *);
 void %(name)s_free(struct %(name)s *);
 void %(name)s_clear(struct %(name)s *);
 void %(name)s_marshal(struct evbuffer *, const struct %(name)s *);
 int %(name)s_unmarshal(struct %(name)s *, struct evbuffer *);
 int %(name)s_complete(struct %(name)s *);
 void evtag_marshal_%(name)s(struct evbuffer *, ev_uint32_t,
     const struct %(name)s *);
 int evtag_unmarshal_%(name)s(struct evbuffer *, ev_uint32_t,
     struct %(name)s *);""" % { 'name' : self._name }
         # Write a setting function of every variable
         for entry in self._entries:
             self.PrintIndented(file, '', entry.AssignDeclaration(
                 entry.AssignFuncName()))
             self.PrintIndented(file, '', entry.GetDeclaration(
                 entry.GetFuncName()))
             if entry.Array():
                 self.PrintIndented(file, '', entry.AddDeclaration(
                     entry.AddFuncName()))
         print >>file, '/* --- %s done --- */\n' % self._name
     def PrintCode(self, file):
         print >>file, ('/*\n'
                        ' * Implementation of %s\n'
                        ' */\n') % self._name
         print >>file, \
               'static struct %(name)s_access_ __%(name)s_base = {' % \
               { 'name' : self._name }
         for entry in self._entries:
             self.PrintIndented(file, '  ', entry.CodeBase())
         print >>file, '};\n'
         # Creation
         print >>file, (
             'struct %(name)s *\n'
             '%(name)s_new(void)\n'
             '{\n'
             '  return %(name)s_new_with_arg(NULL);\n'
             '}\n'
             '\n'
             'struct %(name)s *\n'
             '%(name)s_new_with_arg(void *unused)\n'
             '{\n'
             '  struct %(name)s *tmp;\n'
             '  if ((tmp = malloc(sizeof(struct %(name)s))) == NULL) {\n'
             '    event_warn("%%s: malloc", __func__);\n'
             '    return (NULL);\n'
             '  }\n'
             '  tmp->base = &__%(name)s_base;\n') % { 'name' : self._name }
         for entry in self._entries:
             self.PrintIndented(file, '  ', entry.CodeInitialize('tmp'))
             print >>file, '  tmp->%s_set = 0;\n' % entry.Name()
         print >>file, (
             '  return (tmp);\n'
             '}\n')
         # Adding
         for entry in self._entries:
             if entry.Array():
                 self.PrintIndented(file, '', entry.CodeAdd())
             print >>file, ''
         # Assigning
         for entry in self._entries:
             self.PrintIndented(file, '', entry.CodeAssign())
             print >>file, ''
         # Getting
         for entry in self._entries:
             self.PrintIndented(file, '', entry.CodeGet())
             print >>file, ''
         # Clearing
         print >>file, ( 'void\n'
                         '%(name)s_clear(struct %(name)s *tmp)\n'
                         '{'
                         ) % { 'name' : self._name }
         for entry in self._entries:
             self.PrintIndented(file, '  ', entry.CodeClear('tmp'))
         print >>file, '}\n'
         # Freeing
         print >>file, ( 'void\n'
                         '%(name)s_free(struct %(name)s *tmp)\n'
                         '{'
                         ) % { 'name' : self._name }
         for entry in self._entries:
             self.PrintIndented(file, '  ', entry.CodeFree('tmp'))
         print >>file, ('  free(tmp);\n'
                        '}\n')
         # Marshaling
         print >>file, ('void\n'
                        '%(name)s_marshal(struct evbuffer *evbuf, '
                        'const struct %(name)s *tmp)'
                        '{') % { 'name' : self._name }
         for entry in self._entries:
             indent = '  '
             # Optional entries do not have to be set
             if entry.Optional():
                 indent += '  '
                 print >>file, '  if (tmp->%s_set) {' % entry.Name()
             self.PrintIndented(
                 file, indent,
                 entry.CodeMarshal('evbuf', self.EntryTagName(entry),
                                   entry.GetVarName('tmp'),
                                   entry.GetVarLen('tmp')))
             if entry.Optional():
                 print >>file, '  }'
         print >>file, '}\n'
         # Unmarshaling
         print >>file, ('int\n'
                        '%(name)s_unmarshal(struct %(name)s *tmp, '
                        ' struct evbuffer *evbuf)\n'
                        '{\n'
                        '  ev_uint32_t tag;\n'
                        '  while (evbuffer_get_length(evbuf) > 0) {\n'
                        '    if (evtag_peek(evbuf, &tag) == -1)\n'
                        '      return (-1);\n'
                        '    switch (tag) {\n'
                        ) % { 'name' : self._name }
         for entry in self._entries:
             print >>file, '      case %s:\n' % self.EntryTagName(entry)
             if not entry.Array():
                 print >>file, (
                     '        if (tmp->%s_set)\n'
                     '          return (-1);'
                     ) % (entry.Name())
             self.PrintIndented(
                 file, '        ',
                 entry.CodeUnmarshal('evbuf',
                                     self.EntryTagName(entry),
                                     entry.GetVarName('tmp'),
                                     entry.GetVarLen('tmp')))
             print >>file, ( '        tmp->%s_set = 1;\n' % entry.Name() +
                             '        break;\n' )
         print >>file, ( '      default:\n'
                         '        return -1;\n'
                         '    }\n'
                         '  }\n' )
         # Check if it was decoded completely
         print >>file, ( '  if (%(name)s_complete(tmp) == -1)\n'
                         '    return (-1);'
                         ) % { 'name' : self._name }
         # Successfully decoded
         print >>file, ( '  return (0);\n'
                         '}\n')
         # Checking if a structure has all the required data
         print >>file, (
             'int\n'
             '%(name)s_complete(struct %(name)s *msg)\n'
             '{' ) % { 'name' : self._name }
         for entry in self._entries:
             if not entry.Optional():
                 code = [
                     'if (!msg->%(name)s_set)',
                     '  return (-1);' ]
                 code = TranslateList(code, entry.GetTranslation())
                 self.PrintIndented(
                     file, '  ', code)
             self.PrintIndented(
                 file, '  ',
                 entry.CodeComplete('msg', entry.GetVarName('msg')))
         print >>file, (
             '  return (0);\n'
             '}\n' )
         # Complete message unmarshaling
         print >>file, (
             'int\n'
             'evtag_unmarshal_%(name)s(struct evbuffer *evbuf, '
             'ev_uint32_t need_tag, struct %(name)s *msg)\n'
             '{\n'
             '  ev_uint32_t tag;\n'
             '  int res = -1;\n'
             '\n'
             '  struct evbuffer *tmp = evbuffer_new();\n'
             '\n'
             '  if (evtag_unmarshal(evbuf, &tag, tmp) == -1'
             ' || tag != need_tag)\n'
             '    goto error;\n'
             '\n'
             '  if (%(name)s_unmarshal(msg, tmp) == -1)\n'
             '    goto error;\n'
             '\n'
             '  res = 0;\n'
             '\n'
             ' error:\n'
             '  evbuffer_free(tmp);\n'
             '  return (res);\n'
             '}\n' ) % { 'name' : self._name }
         # Complete message marshaling
         print >>file, (
             'void\n'
             'evtag_marshal_%(name)s(struct evbuffer *evbuf, ev_uint32_t tag, '
             'const struct %(name)s *msg)\n'
             '{\n'
             '  struct evbuffer *_buf = evbuffer_new();\n'
             '  assert(_buf != NULL);\n'
             '  %(name)s_marshal(_buf, msg);\n'
             '  evtag_marshal_buffer(evbuf, tag, _buf);\n '
             '  evbuffer_free(_buf);\n'
             '}\n' ) % { 'name' : self._name }
 class Entry:
     def __init__(self, type, name, tag):
         self._type = type
         self._name = name
         self._tag = int(tag)
         self._ctype = type
         self._optional = 0
         self._can_be_array = 0
         self._array = 0
         self._line_count = -1
         self._struct = None
         self._refname = None
         self._optpointer = True
         self._optaddarg = True
     def GetInitializer(self):
         assert 0, "Entry does not provide initializer"
     def SetStruct(self, struct):
         self._struct = struct
     def LineCount(self):
         assert self._line_count != -1
         return self._line_count
     def SetLineCount(self, number):
         self._line_count = number
     def Array(self):
         return self._array
     def Optional(self):
         return self._optional
     def Tag(self):
         return self._tag
     def Name(self):
         return self._name
     def Type(self):
         return self._type
     def MakeArray(self, yes=1):
         self._array = yes
     def MakeOptional(self):
         self._optional = 1
     def Verify(self):
         if self.Array() and not self._can_be_array:
             raise RpcGenError(
                 'Entry "%s" cannot be created as an array '
                 'around line %d' % (self._name, self.LineCount()))
         if not self._struct:
             raise RpcGenError(
                 'Entry "%s" does not know which struct it belongs to '
                 'around line %d' % (self._name, self.LineCount()))
         if self._optional and self._array:
             raise RpcGenError(
                 'Entry "%s" has illegal combination of optional and array '
                 'around line %d' % (self._name, self.LineCount()))
     def GetTranslation(self, extradict = {}):
         mapping = {
             "parent_name" : self._struct.Name(),
             "name" : self._name,
             "ctype" : self._ctype,
             "refname" : self._refname,
             "optpointer" : self._optpointer and "*" or "",
             "optreference" : self._optpointer and "&" or "",
             "optaddarg" :
             self._optaddarg and ", const %s value" % self._ctype or ""
             }
         for (k, v) in extradict.items():
             mapping[k] = v
         return mapping
     def GetVarName(self, var):
         return '%(var)s->%(name)s_data' % self.GetTranslation({ 'var' : var })
     def GetVarLen(self, var):
         return 'sizeof(%s)' % self._ctype
     def GetFuncName(self):
         return '%s_%s_get' % (self._struct.Name(), self._name)
     def GetDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, %s *);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def CodeGet(self):
         code = (
             'int',
             '%(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, '
             '%(ctype)s *value)',
             '{',
             '  if (msg->%(name)s_set != 1)',
             '    return (-1);',
             '  *value = msg->%(name)s_data;',
             '  return (0);',
             '}' )
         code = '\n'.join(code)
         code = code % self.GetTranslation()
         return code.split('\n')
     def AssignFuncName(self):
         return '%s_%s_assign' % (self._struct.Name(), self._name)
     def AddFuncName(self):
         return '%s_%s_add' % (self._struct.Name(), self._name)
     def AssignDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, const %s);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def CodeAssign(self):
         code = [ 'int',
                  '%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,'
                  ' const %(ctype)s value)',
                  '{',
                  '  msg->%(name)s_set = 1;',
                  '  msg->%(name)s_data = value;',
                  '  return (0);',
                  '}' ]
         code = '\n'.join(code)
         code = code % self.GetTranslation()
         return code.split('\n')
     def CodeClear(self, structname):
         code = [ '%s->%s_set = 0;' % (structname, self.Name()) ]
         return code
     def CodeComplete(self, structname, var_name):
         return []
     def CodeFree(self, name):
         return []
     def CodeBase(self):
         code = [
             '%(parent_name)s_%(name)s_assign,',
             '%(parent_name)s_%(name)s_get,'
             ]
         if self.Array():
             code.append('%(parent_name)s_%(name)s_add,')
         code = '\n'.join(code)
         code = code % self.GetTranslation()
         return code.split('\n')
 class EntryBytes(Entry):
     def __init__(self, type, name, tag, length):
         # Init base class
         Entry.__init__(self, type, name, tag)
         self._length = length
         self._ctype = 'ev_uint8_t'
     def GetInitializer(self):
         return "NULL"
     def GetVarLen(self, var):
         return '(%s)' % self._length
     def CodeArrayAdd(self, varname, value):
         # XXX: copy here
         return [ '%(varname)s = NULL;' % { 'varname' : varname } ]
     def GetDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, %s **);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def AssignDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, const %s *);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def Declaration(self):
         dcl  = ['ev_uint8_t %s_data[%s];' % (self._name, self._length)]
         return dcl
     def CodeGet(self):
         name = self._name
         code = [ 'int',
                  '%s_%s_get(struct %s *msg, %s **value)' % (
             self._struct.Name(), name,
             self._struct.Name(), self._ctype),
                  '{',
                  '  if (msg->%s_set != 1)' % name,
                  '    return (-1);',
                  '  *value = msg->%s_data;' % name,
                  '  return (0);',
                  '}' ]
         return code
     def CodeAssign(self):
         name = self._name
         code = [ 'int',
                  '%s_%s_assign(struct %s *msg, const %s *value)' % (
             self._struct.Name(), name,
             self._struct.Name(), self._ctype),
                  '{',
                  '  msg->%s_set = 1;' % name,
                  '  memcpy(msg->%s_data, value, %s);' % (
             name, self._length),
                  '  return (0);',
                  '}' ]
         return code
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         code = [  'if (evtag_unmarshal_fixed(%(buf)s, %(tag)s, '
                   '%(var)s, %(varlen)s) == -1) {',
                   '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
                   '  return (-1);',
                   '}'
                   ]
         return TranslateList(code,
                              self.GetTranslation({
             'var' : var_name,
             'varlen' : var_len,
             'buf' : buf,
             'tag' : tag_name }))
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = ['evtag_marshal(%s, %s, %s, %s);' % (
             buf, tag_name, var_name, var_len)]
         return code
     def CodeClear(self, structname):
         code = [ '%s->%s_set = 0;' % (structname, self.Name()),
                  'memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (
             structname, self._name, structname, self._name)]
         return code
     def CodeInitialize(self, name):
         code  = ['memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (
             name, self._name, name, self._name)]
         return code
     def Verify(self):
         if not self._length:
             raise RpcGenError(
                 'Entry "%s" needs a length '
                 'around line %d' % (self._name, self.LineCount()))
         Entry.Verify(self)
 class EntryInt(Entry):
     def __init__(self, type, name, tag, bits=32):
         # Init base class
         Entry.__init__(self, type, name, tag)
         self._can_be_array = 1
         if bits == 32:
             self._ctype = 'ev_uint32_t'
             self._marshal_type = 'int'
         if bits == 64:
             self._ctype = 'ev_uint64_t'
             self._marshal_type = 'int64'
     def GetInitializer(self):
         return "0"
     def CodeArrayFree(self, var):
         return []
     def CodeArrayAssign(self, varname, srcvar):
         return [ '%(varname)s = %(srcvar)s;' % { 'varname' : varname,
                                                 'srcvar' : srcvar } ]
     def CodeArrayAdd(self, varname, value):
         """Returns a new entry of this type."""
         return [ '%(varname)s = %(value)s;' % { 'varname' : varname,
                                               'value' : value } ]
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         code = [
             'if (evtag_unmarshal_%(ma)s(%(buf)s, %(tag)s, &%(var)s) == -1) {',
             '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
             '  return (-1);',
             '}' ]
         code = '\n'.join(code) % self.GetTranslation({
             'ma'  : self._marshal_type,
             'buf' : buf,
             'tag' : tag_name,
             'var' : var_name })
         return code.split('\n')
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = [
             'evtag_marshal_%s(%s, %s, %s);' % (
             self._marshal_type, buf, tag_name, var_name)]
         return code
     def Declaration(self):
         dcl  = ['%s %s_data;' % (self._ctype, self._name)]
         return dcl
     def CodeInitialize(self, name):
         code = ['%s->%s_data = 0;' % (name, self._name)]
         return code
 class EntryString(Entry):
     def __init__(self, type, name, tag):
         # Init base class
         Entry.__init__(self, type, name, tag)
         self._can_be_array = 1
         self._ctype = 'char *'
     def GetInitializer(self):
         return "NULL"
     def CodeArrayFree(self, varname):
         code = [
             'if (%(var)s != NULL) free(%(var)s);' ]
         return TranslateList(code, { 'var' : varname })
     def CodeArrayAssign(self, varname, srcvar):
         code = [
             'if (%(var)s != NULL)',
             '  free(%(var)s);',
             '%(var)s = strdup(%(srcvar)s);',
             'if (%(var)s == NULL) {',
             '  event_warnx("%%s: strdup", __func__);',
             '  return (-1);',
             '}' ]
         return TranslateList(code, { 'var' : varname,
                                      'srcvar' : srcvar })
     def CodeArrayAdd(self, varname, value):
         code = [
             'if (%(value)s != NULL) {',
             '  %(var)s = strdup(%(value)s);',
             '  if (%(var)s == NULL) {',
             '    goto error;',
             '  }',
             '} else {',
             '  %(var)s = NULL;',
             '}' ]
         return TranslateList(code, { 'var' : varname,
                                      'value' : value })
     def GetVarLen(self, var):
         return 'strlen(%s)' % self.GetVarName(var)
     def CodeMakeInitalize(self, varname):
         return '%(varname)s = NULL;' % { 'varname' : varname }
     def CodeAssign(self):
         name = self._name
         code = """int
 %(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,
     const %(ctype)s value)
 {
   if (msg->%(name)s_data != NULL)
     free(msg->%(name)s_data);
   if ((msg->%(name)s_data = strdup(value)) == NULL)
     return (-1);
   msg->%(name)s_set = 1;
   return (0);
 }""" % self.GetTranslation()
         return code.split('\n')
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         code = ['if (evtag_unmarshal_string(%(buf)s, %(tag)s, &%(var)s) == -1) {',
                 '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
                 '  return (-1);',
                 '}'
                 ]
         code = '\n'.join(code) % self.GetTranslation({
             'buf' : buf,
             'tag' : tag_name,
             'var' : var_name })
         return code.split('\n')
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = ['evtag_marshal_string(%s, %s, %s);' % (
             buf, tag_name, var_name)]
         return code
     def CodeClear(self, structname):
         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
                  '  free(%s->%s_data);' % (structname, self.Name()),
                  '  %s->%s_data = NULL;' % (structname, self.Name()),
                  '  %s->%s_set = 0;' % (structname, self.Name()),
                  '}'
                  ]
         return code
     def CodeInitialize(self, name):
         code  = ['%s->%s_data = NULL;' % (name, self._name)]
         return code
     def CodeFree(self, name):
         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
                  '    free (%s->%s_data);' % (name, self._name)]
         return code
     def Declaration(self):
         dcl  = ['char *%s_data;' % self._name]
         return dcl
 class EntryStruct(Entry):
     def __init__(self, type, name, tag, refname):
         # Init base class
         Entry.__init__(self, type, name, tag)
         self._optpointer = False
         self._can_be_array = 1
         self._refname = refname
         self._ctype = 'struct %s*' % refname
         self._optaddarg = False
     def GetInitializer(self):
         return "NULL"
     def GetVarLen(self, var):
         return '-1'
     def CodeArrayAdd(self, varname, value):
         code = [
             '%(varname)s = %(refname)s_new();',
             'if (%(varname)s == NULL)',
             '  goto error;' ]
         return TranslateList(code, self.GetTranslation({ 'varname' : varname }))
     def CodeArrayFree(self, var):
         code = [ '%(refname)s_free(%(var)s);' % self.GetTranslation(
             { 'var' : var }) ]
         return code
     def CodeArrayAssign(self, var, srcvar):
         code = [
             'int had_error = 0;',
             'struct evbuffer *tmp = NULL;',
             '%(refname)s_clear(%(var)s);',
             'if ((tmp = evbuffer_new()) == NULL) {',
             '  event_warn("%%s: evbuffer_new()", __func__);',
             '  had_error = 1;',
             '  goto done;',
             '}',
             '%(refname)s_marshal(tmp, %(srcvar)s);',
             'if (%(refname)s_unmarshal(%(var)s, tmp) == -1) {',
             '  event_warnx("%%s: %(refname)s_unmarshal", __func__);',
             '  had_error = 1;',
             '  goto done;',
             '}',
             'done:'
             'if (tmp != NULL)',
             '  evbuffer_free(tmp);',
             'if (had_error) {',
             '  %(refname)s_clear(%(var)s);',
             '  return (-1);',
             '}' ]
         return TranslateList(code, self.GetTranslation({
             'var' : var,
             'srcvar' : srcvar}))
     def CodeGet(self):
         name = self._name
         code = [ 'int',
                  '%s_%s_get(struct %s *msg, %s *value)' % (
             self._struct.Name(), name,
             self._struct.Name(), self._ctype),
                  '{',
                  '  if (msg->%s_set != 1) {' % name,
                  '    msg->%s_data = %s_new();' % (name, self._refname),
                  '    if (msg->%s_data == NULL)' % name,
                  '      return (-1);',
                  '    msg->%s_set = 1;' % name,
                  '  }',
                  '  *value = msg->%s_data;' % name,
                  '  return (0);',
                  '}' ]
         return code
     def CodeAssign(self):
         name = self._name
         code = """int
 %(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,
     const %(ctype)s value)
 {
    struct evbuffer *tmp = NULL;
    if (msg->%(name)s_set) {
      %(refname)s_clear(msg->%(name)s_data);
      msg->%(name)s_set = 0;
    } else {
      msg->%(name)s_data = %(refname)s_new();
      if (msg->%(name)s_data == NULL) {
        event_warn("%%s: %(refname)s_new()", __func__);
        goto error;
      }
    }
    if ((tmp = evbuffer_new()) == NULL) {
      event_warn("%%s: evbuffer_new()", __func__);
      goto error;
    }
    %(refname)s_marshal(tmp, value);
    if (%(refname)s_unmarshal(msg->%(name)s_data, tmp) == -1) {
      event_warnx("%%s: %(refname)s_unmarshal", __func__);
      goto error;
    }
    msg->%(name)s_set = 1;
    evbuffer_free(tmp);
    return (0);
  error:
    if (tmp != NULL)
      evbuffer_free(tmp);
    if (msg->%(name)s_data != NULL) {
      %(refname)s_free(msg->%(name)s_data);
      msg->%(name)s_data = NULL;
    }
    return (-1);
 }""" % self.GetTranslation()
         return code.split('\n')
     def CodeComplete(self, structname, var_name):
         code = [ 'if (%(structname)s->%(name)s_set && '
                  '%(refname)s_complete(%(var)s) == -1)',
                  '  return (-1);' ]
         return TranslateList(code, self.GetTranslation({
             'structname' : structname,
             'var' : var_name }))
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         code = ['%(var)s = %(refname)s_new();',
                 'if (%(var)s == NULL)',
                 '  return (-1);',
                 'if (evtag_unmarshal_%(refname)s(%(buf)s, %(tag)s, '
                 '%(var)s) == -1) {',
                   '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
                 '  return (-1);',
                 '}'
                 ]
         code = '\n'.join(code) % self.GetTranslation({
             'buf' : buf,
             'tag' : tag_name,
             'var' : var_name })
         return code.split('\n')
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = ['evtag_marshal_%s(%s, %s, %s);' % (
             self._refname, buf, tag_name, var_name)]
         return code
     def CodeClear(self, structname):
         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
                  '  %s_free(%s->%s_data);' % (
             self._refname, structname, self.Name()),
                  '  %s->%s_data = NULL;' % (structname, self.Name()),
                  '  %s->%s_set = 0;' % (structname, self.Name()),
                  '}'
                  ]
         return code
     def CodeInitialize(self, name):
         code  = ['%s->%s_data = NULL;' % (name, self._name)]
         return code
     def CodeFree(self, name):
         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
                  '    %s_free(%s->%s_data);' % (
             self._refname, name, self._name)]
         return code
     def Declaration(self):
         dcl  = ['%s %s_data;' % (self._ctype, self._name)]
         return dcl
 class EntryVarBytes(Entry):
     def __init__(self, type, name, tag):
         # Init base class
         Entry.__init__(self, type, name, tag)
         self._ctype = 'ev_uint8_t *'
     def GetInitializer(self):
         return "NULL"
     def GetVarLen(self, var):
         return '%(var)s->%(name)s_length' % self.GetTranslation({ 'var' : var })
     def CodeArrayAdd(self, varname, value):
         # xxx: copy
         return [ '%(varname)s = NULL;' % { 'varname' : varname } ]
     def GetDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, %s *, ev_uint32_t *);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def AssignDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, const %s, ev_uint32_t);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def CodeAssign(self):
         name = self._name
         code = [ 'int',
                  '%s_%s_assign(struct %s *msg, '
                  'const %s value, ev_uint32_t len)' % (
             self._struct.Name(), name,
             self._struct.Name(), self._ctype),
                  '{',
                  '  if (msg->%s_data != NULL)' % name,
                  '    free (msg->%s_data);' % name,
                  '  msg->%s_data = malloc(len);' % name,
                  '  if (msg->%s_data == NULL)' % name,
                  '    return (-1);',
                  '  msg->%s_set = 1;' % name,
                  '  msg->%s_length = len;' % name,
                  '  memcpy(msg->%s_data, value, len);' % name,
                  '  return (0);',
                  '}' ]
         return code
     def CodeGet(self):
         name = self._name
         code = [ 'int',
                  '%s_%s_get(struct %s *msg, %s *value, ev_uint32_t *plen)' % (
             self._struct.Name(), name,
             self._struct.Name(), self._ctype),
                  '{',
                  '  if (msg->%s_set != 1)' % name,
                  '    return (-1);',
                  '  *value = msg->%s_data;' % name,
                  '  *plen = msg->%s_length;' % name,
                  '  return (0);',
                  '}' ]
         return code
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         code = ['if (evtag_payload_length(%(buf)s, &%(varlen)s) == -1)',
                 '  return (-1);',
                 # We do not want DoS opportunities
                 'if (%(varlen)s > evbuffer_get_length(%(buf)s))',
                 '  return (-1);',
                 'if ((%(var)s = malloc(%(varlen)s)) == NULL)',
                 '  return (-1);',
                 'if (evtag_unmarshal_fixed(%(buf)s, %(tag)s, %(var)s, '
                 '%(varlen)s) == -1) {',
                 '  event_warnx("%%s: failed to unmarshal %(name)s", __func__);',
                 '  return (-1);',
                 '}'
                 ]
         code = '\n'.join(code) % self.GetTranslation({
             'buf' : buf,
             'tag' : tag_name,
             'var' : var_name,
             'varlen' : var_len })
         return code.split('\n')
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = ['evtag_marshal(%s, %s, %s, %s);' % (
             buf, tag_name, var_name, var_len)]
         return code
     def CodeClear(self, structname):
         code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),
                  '  free (%s->%s_data);' % (structname, self.Name()),
                  '  %s->%s_data = NULL;' % (structname, self.Name()),
                  '  %s->%s_length = 0;' % (structname, self.Name()),
                  '  %s->%s_set = 0;' % (structname, self.Name()),
                  '}'
                  ]
         return code
     def CodeInitialize(self, name):
         code  = ['%s->%s_data = NULL;' % (name, self._name),
                  '%s->%s_length = 0;' % (name, self._name) ]
         return code
     def CodeFree(self, name):
         code  = ['if (%s->%s_data != NULL)' % (name, self._name),
                  '    free(%s->%s_data);' % (name, self._name)]
         return code
     def Declaration(self):
         dcl  = ['ev_uint8_t *%s_data;' % self._name,
                 'ev_uint32_t %s_length;' % self._name]
         return dcl
 class EntryArray(Entry):
     def __init__(self, entry):
         # Init base class
         Entry.__init__(self, entry._type, entry._name, entry._tag)
         self._entry = entry
         self._refname = entry._refname
         self._ctype = self._entry._ctype
         self._optional = True
         self._optpointer = self._entry._optpointer
         self._optaddarg = self._entry._optaddarg
         # provide a new function for accessing the variable name
         def GetVarName(var_name):
             return '%(var)s->%(name)s_data[%(index)s]' % \
                    self._entry.GetTranslation({'var' : var_name,
                                                'index' : self._index})
         self._entry.GetVarName = GetVarName
     def GetInitializer(self):
         return "NULL"
     def GetVarName(self, var_name):
         return var_name
     def GetVarLen(self, var_name):
         return '-1'
     def GetDeclaration(self, funcname):
         """Allows direct access to elements of the array."""
         code = [
             'int %(funcname)s(struct %(parent_name)s *, int, %(ctype)s *);' %
             self.GetTranslation({ 'funcname' : funcname }) ]
         return code
     def AssignDeclaration(self, funcname):
         code = [ 'int %s(struct %s *, int, const %s);' % (
             funcname, self._struct.Name(), self._ctype ) ]
         return code
     def AddDeclaration(self, funcname):
         code = [
             '%(ctype)s %(optpointer)s '
             '%(funcname)s(struct %(parent_name)s *msg%(optaddarg)s);' % \
             self.GetTranslation({ 'funcname' : funcname }) ]
         return code
     def CodeGet(self):
         code = """int
 %(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, int offset,
     %(ctype)s *value)
 {
   if (!msg->%(name)s_set || offset < 0 || offset >= msg->%(name)s_length)
     return (-1);
   *value = msg->%(name)s_data[offset];
   return (0);
 }""" % self.GetTranslation()
         return code.split('\n')
     def CodeAssign(self):
         code = [
             'int',
             '%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg, int off,',
             '    const %(ctype)s value)',
             '{',
             '  if (!msg->%(name)s_set || off < 0 || off >= msg->%(name)s_length)',
             '    return (-1);\n',
             '  {' ]
         code = TranslateList(code, self.GetTranslation())
         codearrayassign = self._entry.CodeArrayAssign(
             'msg->%(name)s_data[off]' % self.GetTranslation(), 'value')
         code += map(lambda x: '    ' + x, codearrayassign)
         code += TranslateList([
             '  }',
             '  return (0);',
             '}' ], self.GetTranslation())
         return code
     def CodeAdd(self):
         codearrayadd = self._entry.CodeArrayAdd(
             'msg->%(name)s_data[msg->%(name)s_length - 1]' % self.GetTranslation(),
             'value')
         code = [
             'static int',
             '%(parent_name)s_%(name)s_expand_to_hold_more('
             'struct %(parent_name)s *msg)',
             '{',
             '  int tobe_allocated = msg->%(name)s_num_allocated;',
             '  %(ctype)s* new_data = NULL;',
             '  tobe_allocated = !tobe_allocated ? 1 : tobe_allocated << 1;',
             '  new_data = (%(ctype)s*) realloc(msg->%(name)s_data,',
             '      tobe_allocated * sizeof(%(ctype)s));',
             '  if (new_data == NULL)',
             '    return -1;',
             '  msg->%(name)s_data = new_data;',
             '  msg->%(name)s_num_allocated = tobe_allocated;',
             '  return 0;'
             '}',
             '',
             '%(ctype)s %(optpointer)s',
             '%(parent_name)s_%(name)s_add('
             'struct %(parent_name)s *msg%(optaddarg)s)',
             '{',
             '  if (++msg->%(name)s_length >= msg->%(name)s_num_allocated) {',
             '    if (%(parent_name)s_%(name)s_expand_to_hold_more(msg)<0)',
             '      goto error;',
             '  }' ]
         code = TranslateList(code, self.GetTranslation())
         code += map(lambda x: '  ' + x, codearrayadd)
         code += TranslateList([
             '  msg->%(name)s_set = 1;',
             '  return %(optreference)s(msg->%(name)s_data['
             'msg->%(name)s_length - 1]);',
             'error:',
             '  --msg->%(name)s_length;',
             '  return (NULL);',
             '}' ], self.GetTranslation())
         return code
     def CodeComplete(self, structname, var_name):
         self._index = 'i'
         tmp = self._entry.CodeComplete(structname, self._entry.GetVarName(var_name))
         # skip the whole loop if there is nothing to check
         if not tmp:
             return []
         translate = self.GetTranslation({ 'structname' : structname })
         code = [
             '{',
             '  int i;',
             '  for (i = 0; i < %(structname)s->%(name)s_length; ++i) {' ]
         code = TranslateList(code, translate)
         code += map(lambda x: '    ' + x, tmp)
         code += [
             '  }',
             '}' ]
         return code
     def CodeUnmarshal(self, buf, tag_name, var_name, var_len):
         translate = self.GetTranslation({ 'var' : var_name,
                                           'buf' : buf,
                                           'tag' : tag_name,
                                           'init' : self._entry.GetInitializer()})
         code = [
             'if (%(var)s->%(name)s_length >= %(var)s->%(name)s_num_allocated &&',
             '    %(parent_name)s_%(name)s_expand_to_hold_more(%(var)s) < 0) {',
             '  puts("HEY NOW");',
             '  return (-1);',
             '}']
         # the unmarshal code directly returns
         code = TranslateList(code, translate)
         self._index = '%(var)s->%(name)s_length' % translate
         code += self._entry.CodeUnmarshal(buf, tag_name,
                                         self._entry.GetVarName(var_name),
                                         self._entry.GetVarLen(var_name))
         code += [ '++%(var)s->%(name)s_length;' % translate ]
         return code
     def CodeMarshal(self, buf, tag_name, var_name, var_len):
         code = ['{',
                 '  int i;',
                 '  for (i = 0; i < %(var)s->%(name)s_length; ++i) {' ]
         self._index = 'i'
         code += self._entry.CodeMarshal(buf, tag_name,
                                         self._entry.GetVarName(var_name),
                                         self._entry.GetVarLen(var_name))
         code += ['  }',
                  '}'
                  ]
         code = "\n".join(code) % self.GetTranslation({ 'var' : var_name })
         return code.split('\n')
     def CodeClear(self, structname):
         translate = self.GetTranslation({ 'structname' : structname })
         codearrayfree = self._entry.CodeArrayFree(
             '%(structname)s->%(name)s_data[i]' % self.GetTranslation(
             { 'structname' : structname } ))
         code = [ 'if (%(structname)s->%(name)s_set == 1) {' ]
         if codearrayfree:
             code += [
                 '  int i;',
                 '  for (i = 0; i < %(structname)s->%(name)s_length; ++i) {' ]
         code = TranslateList(code, translate)
         if codearrayfree:
             code += map(lambda x: '    ' + x, codearrayfree)
             code += [
                 '  }' ]
         code += TranslateList([
                  '  free(%(structname)s->%(name)s_data);',
                  '  %(structname)s->%(name)s_data = NULL;',
                  '  %(structname)s->%(name)s_set = 0;',
                  '  %(structname)s->%(name)s_length = 0;',
                  '  %(structname)s->%(name)s_num_allocated = 0;',
                  '}'
                  ], translate)
         return code
     def CodeInitialize(self, name):
         code  = ['%s->%s_data = NULL;' % (name, self._name),
                  '%s->%s_length = 0;' % (name, self._name),
                  '%s->%s_num_allocated = 0;' % (name, self._name)]
         return code
     def CodeFree(self, structname):
         code = self.CodeClear(structname);
         code += TranslateList([
             'free(%(structname)s->%(name)s_data);' ],
                               self.GetTranslation({'structname' : structname }))
         return code
     def Declaration(self):
         dcl  = ['%s *%s_data;' % (self._ctype, self._name),
                 'int %s_length;' % self._name,
                 'int %s_num_allocated;' % self._name ]
         return dcl
 def NormalizeLine(line):
     global white
     global cppcomment
     line = cppcomment.sub('', line)
     line = line.strip()
     line = white.sub(' ', line)
     return line
 def ProcessOneEntry(factory, newstruct, entry):
     optional = 0
     array = 0
     entry_type = ''
     name = ''
     tag = ''
     tag_set = None
     separator = ''
     fixed_length = ''
     tokens = entry.split(' ')
     while tokens:
         token = tokens[0]
         tokens = tokens[1:]
         if not entry_type:
             if not optional and token == 'optional':
                 optional = 1
                 continue
             if not array and token == 'array':
                 array = 1
                 continue
         if not entry_type:
             entry_type = token
             continue
         if not name:
             res = re.match(r'^([^\[\]]+)(\[.*\])?$', token)
             if not res:
                  raise RpcGenError(
                      'Cannot parse name: \"%s\" '
                      'around line %d' % (entry, line_count))
             name = res.group(1)
             fixed_length = res.group(2)
             if fixed_length:
                 fixed_length = fixed_length[1:-1]
             continue
         if not separator:
             separator = token
             if separator != '=':
                  raise RpcGenError('Expected "=" after name \"%s\" got %s'
                                    % (name, token))
             continue
         if not tag_set:
             tag_set = 1
             if not re.match(r'^(0x)?[0-9]+$', token):
                 raise RpcGenError('Expected tag number: \"%s\"' % entry)
             tag = int(token, 0)
             continue
         raise RpcGenError('Cannot parse \"%s\"' % entry)
     if not tag_set:
         raise RpcGenError('Need tag number: \"%s\"' % entry)
     # Create the right entry
     if entry_type == 'bytes':
         if fixed_length:
             newentry = factory.EntryBytes(entry_type, name, tag, fixed_length)
         else:
             newentry = factory.EntryVarBytes(entry_type, name, tag)
     elif entry_type == 'int' and not fixed_length:
         newentry = factory.EntryInt(entry_type, name, tag)
     elif entry_type == 'int64' and not fixed_length:
         newentry = factory.EntryInt(entry_type, name, tag, bits=64)
     elif entry_type == 'string' and not fixed_length:
         newentry = factory.EntryString(entry_type, name, tag)
     else:
         res = structref.match(entry_type)
         if res:
             # References another struct defined in our file
             newentry = factory.EntryStruct(entry_type, name, tag, res.group(1))
         else:
             raise RpcGenError('Bad type: "%s" in "%s"' % (entry_type, entry))
     structs = []
     if optional:
         newentry.MakeOptional()
     if array:
         newentry.MakeArray()
     newentry.SetStruct(newstruct)
     newentry.SetLineCount(line_count)
     newentry.Verify()
     if array:
         # We need to encapsulate this entry into a struct
         newname = newentry.Name()+ '_array'
         # Now borgify the new entry.
         newentry = factory.EntryArray(newentry)
         newentry.SetStruct(newstruct)
         newentry.SetLineCount(line_count)
         newentry.MakeArray()
     newstruct.AddEntry(newentry)
     return structs
 def ProcessStruct(factory, data):
     tokens = data.split(' ')
     # First three tokens are: 'struct' 'name' '{'
     newstruct = factory.Struct(tokens[1])
     inside = ' '.join(tokens[3:-1])
     tokens = inside.split(';')
     structs = []
     for entry in tokens:
         entry = NormalizeLine(entry)
         if not entry:
             continue
         # It's possible that new structs get defined in here
         structs.extend(ProcessOneEntry(factory, newstruct, entry))
     structs.append(newstruct)
     return structs
 def GetNextStruct(file):
     global line_count
     global cppdirect
     got_struct = 0
     processed_lines = []
     have_c_comment = 0
     data = ''
     while 1:
         line = file.readline()
         if not line:
             break
         line_count += 1
         line = line[:-1]
         if not have_c_comment and re.search(r'/\*', line):
             if re.search(r'/\*.*?\*/', line):
                 line = re.sub(r'/\*.*?\*/', '', line)
             else:
                 line = re.sub(r'/\*.*$', '', line)
                 have_c_comment = 1
         if have_c_comment:
             if not re.search(r'\*/', line):
                 continue
             have_c_comment = 0
             line = re.sub(r'^.*\*/', '', line)
         line = NormalizeLine(line)
         if not line:
             continue
         if not got_struct:
             if re.match(r'#include ["<].*[>"]', line):
                 cppdirect.append(line)
                 continue
             if re.match(r'^#(if( |def)|endif)', line):
                 cppdirect.append(line)
                 continue
             if re.match(r'^#define', line):
                 headerdirect.append(line)
                 continue
             if not structdef.match(line):
                 raise RpcGenError('Missing struct on line %d: %s'
                                   % (line_count, line))
             else:
                 got_struct = 1
                 data += line
             continue
         # We are inside the struct
         tokens = line.split('}')
         if len(tokens) == 1:
             data += ' ' + line
             continue
         if len(tokens[1]):
             raise RpcGenError('Trailing garbage after struct on line %d'
                               % line_count)
         # We found the end of the struct
         data += ' %s}' % tokens[0]
         break
     # Remove any comments, that might be in there
     data = re.sub(r'/\*.*\*/', '', data)
     return data
 def Parse(factory, file):
     """
     Parses the input file and returns C code and corresponding header file.
     """
     entities = []
     while 1:
         # Just gets the whole struct nicely formatted
         data = GetNextStruct(file)
         if not data:
             break
         entities.extend(ProcessStruct(factory, data))
     return entities
 class CCodeGenerator:
     def __init__(self):
         pass
     def GuardName(self, name):
         # Use the complete provided path to the input file, with all
         # non-identifier characters replaced with underscores, to
         # reduce the chance of a collision between guard macros.
         return '_' + nonident.sub('_', name).upper() + '_'
     def HeaderPreamble(self, name):
         guard = self.GuardName(name)
         pre = (
             '/*\n'
             ' * Automatically generated from %s\n'
             ' */\n\n'
             '#ifndef %s\n'
             '#define %s\n\n' ) % (
             name, guard, guard)
         for statement in headerdirect:
             pre += '%s\n' % statement
         if headerdirect:
             pre += '\n'
         pre += (
             '#include <event2/util.h> /* for ev_uint*_t */\n'
             '#include <event2/rpc.h>\n'
         )
         return pre
     def HeaderPostamble(self, name):
         guard = self.GuardName(name)
         return '#endif  /* %s */' % guard
     def BodyPreamble(self, name, header_file):
         global _NAME
         global _VERSION
         slash = header_file.rfind('/')
         if slash != -1:
             header_file = header_file[slash+1:]
         pre = ( '/*\n'
                 ' * Automatically generated from %s\n'
                 ' * by %s/%s.  DO NOT EDIT THIS FILE.\n'
                 ' */\n\n' ) % (name, _NAME, _VERSION)
         pre += ( '#include <stdlib.h>\n'
                  '#include <string.h>\n'
                  '#include <assert.h>\n'
                  '#include <event2/event-config.h>\n'
                  '#include <event2/event.h>\n'
                  '#include <event2/buffer.h>\n'
                  '#include <event2/tag.h>\n\n'
                  '#ifdef _EVENT___func__\n'
                  '#define __func__ _EVENT___func__\n'
                  '#endif\n\n'
                  )
         for statement in cppdirect:
             pre += '%s\n' % statement
         pre += '\n#include "%s"\n\n' % header_file
         pre += 'void event_warn(const char *fmt, ...);\n'
         pre += 'void event_warnx(const char *fmt, ...);\n\n'
         return pre
     def HeaderFilename(self, filename):
         return '.'.join(filename.split('.')[:-1]) + '.h'
     def CodeFilename(self, filename):
         return '.'.join(filename.split('.')[:-1]) + '.gen.c'
     def Struct(self, name):
         return StructCCode(name)
     def EntryBytes(self, entry_type, name, tag, fixed_length):
         return EntryBytes(entry_type, name, tag, fixed_length)
     def EntryVarBytes(self, entry_type, name, tag):
         return EntryVarBytes(entry_type, name, tag)
     def EntryInt(self, entry_type, name, tag, bits=32):
         return EntryInt(entry_type, name, tag, bits)
     def EntryString(self, entry_type, name, tag):
         return EntryString(entry_type, name, tag)
     def EntryStruct(self, entry_type, name, tag, struct_name):
         return EntryStruct(entry_type, name, tag, struct_name)
     def EntryArray(self, entry):
         return EntryArray(entry)
 class Usage(RpcGenError):
     def __init__(self, argv0):
         RpcGenError.__init__("usage: %s input.rpc [[output.h] output.c]"
                              % argv0)
 class CommandLine:
     def __init__(self, argv):
         """Initialize a command-line to launch event_rpcgen, as if
            from a command-line with CommandLine(sys.argv).  If you're
            calling this directly, remember to provide a dummy value
            for sys.argv[0]
         """
         self.filename = None
         self.header_file = None
         self.impl_file = None
         self.factory = CCodeGenerator()
         if len(argv) < 2 or len(argv) > 4:
             raise Usage(argv[0])
         self.filename = argv[1].replace('\\', '/')
         if len(argv) == 3:
             self.impl_file = argv[2].replace('\\', '/')
         if len(argv) == 4:
             self.header_file = argv[2].replace('\\', '/')
             self.impl_file = argv[3].replace('\\', '/')
         if not self.filename:
             raise Usage(argv[0])
         if not self.impl_file:
             self.impl_file = self.factory.CodeFilename(self.filename)
         if not self.header_file:
             self.header_file = self.factory.HeaderFilename(self.impl_file)
         if not self.impl_file.endswith('.c'):
             raise RpcGenError("can only generate C implementation files")
         if not self.header_file.endswith('.h'):
             raise RpcGenError("can only generate C header files")
     def run(self):
         filename = self.filename
         header_file = self.header_file
         impl_file = self.impl_file
         factory = self.factory
         print >>sys.stderr, 'Reading \"%s\"' % filename
         fp = open(filename, 'r')
         entities = Parse(factory, fp)
         fp.close()
         print >>sys.stderr, '... creating "%s"' % header_file
         header_fp = open(header_file, 'w')
         print >>header_fp, factory.HeaderPreamble(filename)
         # Create forward declarations: allows other structs to reference
         # each other
         for entry in entities:
             entry.PrintForwardDeclaration(header_fp)
         print >>header_fp, ''
         for entry in entities:
             entry.PrintTags(header_fp)
             entry.PrintDeclaration(header_fp)
         print >>header_fp, factory.HeaderPostamble(filename)
         header_fp.close()
         print >>sys.stderr, '... creating "%s"' % impl_file
         impl_fp = open(impl_file, 'w')
         print >>impl_fp, factory.BodyPreamble(filename, header_file)
         for entry in entities:
             entry.PrintCode(impl_fp)
         impl_fp.close()
 if __name__ == '__main__':
     try:
         CommandLine(sys.argv).run()
         sys.exit(0)
     except RpcGenError, e:
         print >>sys.stderr, e
         sys.exit(1)
     except EnvironmentError, e:
         if e.filename and e.strerror:
             print >>sys.stderr, "%s: %s" % (e.filename, e.strerror)
             sys.exit(1)
         elif e.strerror:
             print >> sys.stderr, e.strerror
             sys.exit(1)
         else:
             raise

The Tor Browser / annotate

ipc/chromium/src/third_party/libevent/event_rpcgen.py@6474c204b198 (annotated)

ipc/chromium/src/third_party/libevent/event_rpcgen.py