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