diff -c SpreadModule-1.5/setup.py SpreadModule-1.5v4/setup.py
*** SpreadModule-1.5/setup.py	Tue Jan 25 11:40:45 2005
--- SpreadModule-1.5v4/setup.py	Tue Dec 19 13:41:06 2006
***************
*** 64,74 ****
      ext = Extension('spread', ['spreadmodule.c'],
                  include_dirs = [SPREAD_DIR + "/include"],
                  library_dirs = [SPREAD_DIR + "/lib"],
!                 libraries = ['tspread'],
                  )
  
  setup(name = "SpreadModule",
!       version = "1.5",
        maintainer = "Zope Corporation",
        maintainer_email = "zodb-dev@zope.org",
        description = doclines[0],
--- 64,74 ----
      ext = Extension('spread', ['spreadmodule.c'],
                  include_dirs = [SPREAD_DIR + "/include"],
                  library_dirs = [SPREAD_DIR + "/lib"],
!                 libraries = ['tspread-core'],
                  )
  
  setup(name = "SpreadModule",
!       version = "1.5v4",
        maintainer = "Zope Corporation",
        maintainer_email = "zodb-dev@zope.org",
        description = doclines[0],
diff -c SpreadModule-1.5/spreadmodule.c SpreadModule-1.5v4/spreadmodule.c
*** SpreadModule-1.5/spreadmodule.c	Tue Jan 18 14:08:42 2005
--- SpreadModule-1.5v4/spreadmodule.c	Mon Dec 18 13:43:40 2006
***************
*** 62,67 ****
--- 62,70 ----
  #define DEFAULT_GROUPS_SIZE 10
  #define DEFAULT_BUFFER_SIZE 10000
  
+ #define MAX_VSSETS      10
+ #define MAX_MEMBERS     100
+ 
  typedef struct {
  	PyObject_HEAD
  	mailbox mbox;
***************
*** 89,95 ****
  	PyObject *group;
  	PyObject *group_id;
  	PyObject *members;
! 	PyObject *extra; /* that are still members */
  } MembershipMsg;
  
  typedef struct {
--- 92,98 ----
  	PyObject *group;
  	PyObject *group_id;
  	PyObject *members;
! 	PyObject *orig_members; /* the vs sets that came together in this vs */
  } MembershipMsg;
  
  typedef struct {
***************
*** 193,206 ****
  		   char (*members)[MAX_GROUP_NAME], char *buffer, int size)
  {
  	MembershipMsg *self;
!         int32 num_extra_members;
!         group_id grp_id;
  	/* Although extra_members isn't referenced unless num_extra_members is
  	 * greater than 0, gcc doesn't realize that, so force extra_members to
  	 * be initialized (suppressing a nuisance complaint from the compiler).
  	 */
! 	char *extra_members = NULL;
! 	int i;
  
  	assert(group != NULL);
  	self = PyObject_New(MembershipMsg, &MembershipMsg_Type);
--- 196,216 ----
  		   char (*members)[MAX_GROUP_NAME], char *buffer, int size)
  {
  	MembershipMsg *self;
! 	int32 num_extra_members;
! 	group_id grp_id;
  	/* Although extra_members isn't referenced unless num_extra_members is
  	 * greater than 0, gcc doesn't realize that, so force extra_members to
  	 * be initialized (suppressing a nuisance complaint from the compiler).
  	 */
! 	membership_info  memb_info;
! 	int              max_num_vs_sets = MAX_VSSETS;
! 	vs_set_info      vssets_buffer[MAX_VSSETS];
! 	vs_set_info      *vssets = vssets_buffer;
! 	unsigned int     my_vsset_index;
! 	int              num_vs_sets, max_members;
! 	char             vs_members_buffer[MAX_MEMBERS][MAX_GROUP_NAME];
! 	char             (*vs_members)[MAX_GROUP_NAME] = vs_members_buffer;
! 	int              i, j, ret;
  
  	assert(group != NULL);
  	self = PyObject_New(MembershipMsg, &MembershipMsg_Type);
***************
*** 210,216 ****
  	Py_INCREF(group);
  	self->group = group;
  	self->members = NULL;
! 	self->extra = NULL;
  	self->group_id = NULL;
  	self->members = PyTuple_New(num_members);
  	if (self->members == NULL) {
--- 220,226 ----
  	Py_INCREF(group);
  	self->group = group;
  	self->members = NULL;
! 	self->orig_members = NULL;
  	self->group_id = NULL;
  	self->members = PyTuple_New(num_members);
  	if (self->members == NULL) {
***************
*** 226,285 ****
  		PyTuple_SET_ITEM(self->members, i, s);
  	}
  
! 	num_extra_members = 0;
! 	if (SP_get_vs_set_offset_memb_mess() <= size) {
! 		/* Pick grp_id and num_extra_members out of the buffer.
! 		 * This uses memcpy instead of casting tricks because there's
! 		 * no guarantee that the offsets in buffer are properly
! 		 * aligned for the type.  Even gcc's memcpy() can produce
! 		 * segfaults then, unless the natural type is first cast
! 		 * away to char*.
! 		 */
! 		memcpy((char *)&grp_id,
! 		       buffer + SP_get_gid_offset_memb_mess(),
! 		       sizeof(grp_id));
!                 self->group_id = new_group_id(grp_id);
  		if (self->group_id == NULL) {
  			Py_DECREF(self);
  			return NULL;
  		}
! 		memcpy((char *)&num_extra_members,
! 		       buffer + SP_get_num_vs_offset_memb_mess(),
! 		       sizeof(num_extra_members));
!                 extra_members = buffer + SP_get_vs_set_offset_memb_mess();
! 
! 		if (size - SP_get_vs_set_offset_memb_mess() <
! 		    num_extra_members * MAX_GROUP_NAME) {
! 			/* SP_receive error (corrupted message). */
! 			Py_DECREF(self);
! 			PyErr_Format(PyExc_AssertionError,
! 				"SP_receive:  a membership message said "
! 				"there were %d extra members, but only %d "
! 				"bytes remain in the buffer.  Corrupted "
! 				"message?",
! 			     	num_extra_members,
! 			     	size - SP_get_vs_set_offset_memb_mess());
! 			return NULL;
  		}
! 	}
! 
! 	self->extra = PyTuple_New(num_extra_members);
! 	if (self->extra == NULL) {
! 		Py_DECREF(self);
! 		return NULL;
! 	}
! 	for (i = 0; i < num_extra_members; i++, extra_members+= MAX_GROUP_NAME) {
! 		PyObject *s;
! 		/* Spread promises this: */
! 		assert(strlen(extra_members) < MAX_GROUP_NAME);
! 		s = PyString_FromString(extra_members);
! 		if (!s) {
! 			Py_DECREF(self);
! 			return NULL;
  		}
- 		PyTuple_SET_ITEM(self->extra, i, s);
  	}
  	return (PyObject *)self;
  }
  
  static void
--- 236,313 ----
  		PyTuple_SET_ITEM(self->members, i, s);
  	}
  
! 	ret = SP_get_memb_info( buffer, type, &memb_info );
! 	if (ret < 0) {
! 		Py_DECREF(self);   /* printf("BUG: membership message does not have valid body\n"); */
! 		return NULL;
! 	}
! 		
! 	if ( type & REG_MEMB_MESS ) {
! 		self->group_id = new_group_id(memb_info.gid);
  		if (self->group_id == NULL) {
  			Py_DECREF(self);
  			return NULL;
  		}
! 		if ( memb_info.num_vs_sets > max_num_vs_sets ) {
! 			max_num_vs_sets = memb_info.num_vs_sets;
! 			vssets = malloc(sizeof(vs_set_info) * max_num_vs_sets);
! 			if (vssets == NULL) {
! 				PyErr_NoMemory();
! 				goto memb_error;
! 			}
  		}
! 		num_vs_sets = SP_get_vs_sets_info( buffer, &vssets[0], max_num_vs_sets, &my_vsset_index );
! 		if (num_vs_sets < 0) {
! 			goto memb_error;   /* shouldn't happen */
! 		}
! 		self->orig_members = PyTuple_New(num_vs_sets);
! 		if (self->orig_members == NULL) {
! 			goto memb_error;
! 		}
! 		max_members = 0;
! 		for ( i = 0; i < num_vs_sets; i++ ) {
! 			if ( vssets[i].num_members > max_members ) { max_members = vssets[i].num_members; }
! 		}
! 		if ( max_members > MAX_MEMBERS ) {
! 			vs_members = malloc( MAX_GROUP_NAME * max_members );
! 			if (vs_members == NULL) {
! 				PyErr_NoMemory();
! 				goto memb_error;
! 			}
! 		}
! 		for ( i = 0; i < num_vs_sets; i++ ) {
! 			PyObject *t;
! 			ret = SP_get_vs_set_members(buffer, &vssets[i], vs_members, max_members);
! 			if (ret < 0) {
! 				goto memb_error;   /* shouldn't happen */
! 			}
! 			t = PyTuple_New(vssets[i].num_members);
! 			for ( j = 0; j < vssets[i].num_members; j++ ) {
! 				PyObject *s;
! 				/* Spread promises this: */
! 				assert(strlen(vs_members[j]) < MAX_GROUP_NAME);
! 				s = PyString_FromString(vs_members[j]);
! 				if (!s) {
! 					goto memb_error;
! 				}
! 				PyTuple_SET_ITEM(t, j, s);
! 			}
! 			PyTuple_SET_ITEM(self->orig_members, i, t);
  		}
  	}
+ 
+ 	if (vssets != vssets_buffer)
+ 		free(vssets);
+ 	if (vs_members != vs_members_buffer)
+ 		free(vs_members);
  	return (PyObject *)self;
+ memb_error:
+ 	if (vssets != vssets_buffer)
+ 		free(vssets);
+ 	if (vs_members != vs_members_buffer)
+ 		free(vs_members);
+ 	Py_DECREF(self);
+ 	return NULL;
  }
  
  static void
***************
*** 287,293 ****
  {
  	Py_XDECREF(self->group);
  	Py_XDECREF(self->members);
! 	Py_XDECREF(self->extra);
  	Py_XDECREF(self->group_id);
  	PyObject_Del(self);
  }
--- 315,321 ----
  {
  	Py_XDECREF(self->group);
  	Py_XDECREF(self->members);
! 	Py_XDECREF(self->orig_members);
  	Py_XDECREF(self->group_id);
  	PyObject_Del(self);
  }
***************
*** 299,305 ****
  	{"group",	T_OBJECT,	OFF(group)},
  	{"group_id",	T_OBJECT,	OFF(group_id)},
  	{"members",	T_OBJECT,	OFF(members)},
! 	{"extra",	T_OBJECT,	OFF(extra)},
  	{NULL}
  };
  
--- 327,333 ----
  	{"group",	T_OBJECT,	OFF(group)},
  	{"group_id",	T_OBJECT,	OFF(group_id)},
  	{"members",	T_OBJECT,	OFF(members)},
! 	{"orig_members",	T_OBJECT,	OFF(orig_members)},
  	{NULL}
  };
  
diff -c SpreadModule-1.5/testspread.py SpreadModule-1.5v4/testspread.py
*** SpreadModule-1.5/testspread.py	Tue Jan 18 14:08:42 2005
--- SpreadModule-1.5v4/testspread.py	Mon Dec 18 13:58:21 2006
***************
*** 83,91 ****
                           "expected group to have one member")
          self.assertEqual(msg.members[0], mbox.private_group,
                           "expected this mbox to be in group")
!         self.assertEqual(len(msg.extra), 1,
                           "expected one mbox to cause the join")
!         self.assertEqual(msg.extra[0], mbox.private_group,
                           "expected this mbox to cause the join")
  
          mbox.leave(group)
--- 83,93 ----
                           "expected group to have one member")
          self.assertEqual(msg.members[0], mbox.private_group,
                           "expected this mbox to be in group")
!         self.assertEqual(len(msg.orig_members), 1,
                           "expected one mbox to cause the join")
!         self.assertEqual(len(msg.orig_members[0]), 1,
!                          "expected one mbox to cause the join")
!         self.assertEqual(msg.orig_members[0][0], mbox.private_group,
                           "expected this mbox to cause the join")
  
          mbox.leave(group)
***************
*** 94,100 ****
          self.assertEqual(msg.group, group)
          self.assertEqual(msg.reason, spread.CAUSED_BY_LEAVE)
          self.assertEqual(len(msg.members), 0)
!         self.assertEqual(len(msg.extra), 0)
  
          mbox.disconnect()
  
--- 96,102 ----
          self.assertEqual(msg.group, group)
          self.assertEqual(msg.reason, spread.CAUSED_BY_LEAVE)
          self.assertEqual(len(msg.members), 0)
!         self.assertEqual(msg.orig_members, None)
  
          mbox.disconnect()