/*****************************************************************************

  Copyright (c) 2001, 2002 Zope Corporation and Contributors.
  All Rights Reserved.
  
  This software is subject to the provisions of the Zope Public License,
  Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
  WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
  FOR A PARTICULAR PURPOSE
  
 ****************************************************************************/

#define SETTEMPLATE_C "$Id: SetTemplate.c,v 1.12.18.1 2002/02/13 16:37:02 gvanrossum Exp $\n"

static PyObject *
Set_insert(Bucket *self, PyObject *args)
{
  PyObject *key;
  int i;

  UNLESS (PyArg_ParseTuple(args, "O", &key)) return NULL;
  if ( (i=_bucket_set(self, key, Py_None, 1, 1, 0)) < 0) return NULL;
  return PyInt_FromLong(i);
}

static PyObject *
Set_update(Bucket *self, PyObject *args)
{
  PyObject *seq=0, *o, *t, *v, *tb;
  int i, n=0, ind;

  UNLESS(PyArg_ParseTuple(args, "|O:update", &seq)) return NULL;

  if (seq)
    {
      for (i=0; ; i++)
        {
          UNLESS (o=PySequence_GetItem(seq, i))
            {
              PyErr_Fetch(&t, &v, &tb);
              if (t != PyExc_IndexError)
                {
                  PyErr_Restore(t, v, tb);
                  return NULL;
                }
              Py_XDECREF(t);
              Py_XDECREF(v);
              Py_XDECREF(tb);
              break;
            }
          ind=_bucket_set(self, o, Py_None, 1, 1, 0);
          Py_DECREF(o);
          if (ind < 0) return NULL;
          n += ind;
        }
    }

  return PyInt_FromLong(n);
}

static PyObject *
Set_remove(Bucket *self, PyObject *args)
{
  PyObject *key;

  UNLESS (PyArg_ParseTuple(args, "O", &key)) return NULL;
  if (_bucket_set(self, key, NULL, 0, 1, 0) < 0) return NULL;

  Py_INCREF(Py_None);
  return Py_None;
}

static int
_set_setstate(Bucket *self, PyObject *args)
{
  PyObject *k, *items;
  Bucket *next=0;
  int i, l, copied=1;
  KEY_TYPE *keys;

  UNLESS (PyArg_ParseTuple(args, "O|O", &items, &next))
    return -1;

  if ((l=PyTuple_Size(items)) < 0) return -1;

  for (i=self->len; --i >= 0; )
    {
      DECREF_KEY(self->keys[i]);
    }
  self->len=0;

  if (self->next)
    {
      Py_DECREF(self->next);
      self->next=0;
    }
  
  if (l > self->size)
    {
      UNLESS (keys=PyRealloc(self->keys, sizeof(KEY_TYPE)*l)) return -1;
      self->keys=keys;
      self->size=l;
    }
  
  for (i=0; i<l; i++)
    {
      k=PyTuple_GET_ITEM(items, i);
      COPY_KEY_FROM_ARG(self->keys[i], k, copied);
      UNLESS (copied) return -1;
      INCREF_KEY(self->keys[i]);
    }

  self->len=l;

  if (next)
    {
      self->next=next;
      Py_INCREF(next);
    }

  return 0;
}

static PyObject *
set_setstate(Bucket *self, PyObject *args)
{
  int r;

  UNLESS (PyArg_ParseTuple(args, "O", &args)) return NULL;

  PER_PREVENT_DEACTIVATION(self); 
  r=_set_setstate(self, args);
  PER_ALLOW_DEACTIVATION(self);
  PER_ACCESSED(self);

  if (r < 0) return NULL;
  Py_INCREF(Py_None);
  return Py_None;
}

static struct PyMethodDef Set_methods[] = {
  {"__getstate__", (PyCFunction) bucket_getstate,	METH_VARARGS,
   "__getstate__() -- Return the picklable state of the object"},
  {"__setstate__", (PyCFunction) set_setstate,	METH_VARARGS,
   "__setstate__() -- Set the state of the object"},
  {"keys",	(PyCFunction) bucket_keys,	METH_VARARGS,
     "keys() -- Return the keys"},
  {"has_key",	(PyCFunction) bucket_has_key,	METH_VARARGS,
     "has_key(key) -- Test whether the bucket contains the given key"},
  {"clear",	(PyCFunction) bucket_clear,	METH_VARARGS,
   "clear() -- Remove all of the items from the bucket"},
  {"maxKey", (PyCFunction) Bucket_maxKey,	METH_VARARGS,
   "maxKey([key]) -- Fine the maximum key\n\n"
   "If an argument is given, find the maximum <= the argument"},
  {"minKey", (PyCFunction) Bucket_minKey,	METH_VARARGS,
   "minKey([key]) -- Fine the minimum key\n\n"
   "If an argument is given, find the minimum >= the argument"},
#ifdef PERSISTENT
  {"_p_resolveConflict", (PyCFunction) bucket__p_resolveConflict, METH_VARARGS,
   "_p_resolveConflict() -- Reinitialize from a newly created copy"},
  {"_p_deactivate", (PyCFunction) bucket__p_deactivate, METH_VARARGS,
   "_p_deactivate() -- Reinitialize from a newly created copy"},
#endif
  {"insert",	(PyCFunction)Set_insert,	METH_VARARGS,
   "insert(id,[ignored]) -- Add a key to the set"},
  {"update",	(PyCFunction)Set_update,	METH_VARARGS,
   "update(seq) -- Add the items from the given sequence to the set"},
  {"__init__",	(PyCFunction)Set_update,	METH_VARARGS,
   "__init__(seq) -- Initialize with  the items from the given sequence"},
  {"remove",	(PyCFunction)Set_remove,	METH_VARARGS,
   "remove(id) -- Remove an id from the set"},

  {NULL,		NULL}		/* sentinel */
};

static PyObject *
set_repr(Bucket *self)
{
  static PyObject *format;
  PyObject *r, *t;

  UNLESS (format) UNLESS (format=PyString_FromString(MOD_NAME_PREFIX "Set(%s)")) 
    return NULL;
  UNLESS (t=PyTuple_New(1)) return NULL;
  UNLESS (r=bucket_keys(self,NULL)) goto err;
  PyTuple_SET_ITEM(t,0,r);
  r=t;
  ASSIGN(r,PyString_Format(format,r));
  return r;
err:
  Py_DECREF(t);
  return NULL;
}

static int
set_length(Bucket *self) 
{
  int r;

  PER_USE_OR_RETURN(self, -1);
  r = self->len;
  PER_ALLOW_DEACTIVATION(self);
  PER_ACCESSED(self);

  return r;
}

static PyObject *
set_item(Bucket *self, int index)
{
  PyObject *r=0;

  PER_USE_OR_RETURN(self, NULL);
  if (index >= 0 && index < self->len)
    {
      COPY_KEY_TO_OBJECT(r, self->keys[index]);
    }
  else
    IndexError(index);

  PER_ALLOW_DEACTIVATION(self);
  PER_ACCESSED(self);

  return r;
}

static PySequenceMethods set_as_sequence = {
	(inquiry)set_length,		/*sq_length*/
	(binaryfunc)0,		/*sq_concat*/
	(intargfunc)0,		/*sq_repeat*/
	(intargfunc)set_item,		/*sq_item*/
	(intintargfunc)0,		/*sq_slice*/
	(intobjargproc)0,	/*sq_ass_item*/
	(intintobjargproc)0,	/*sq_ass_slice*/
};

static PyExtensionClass SetType = {
  PyObject_HEAD_INIT(NULL)
  0,				/*ob_size*/
  MOD_NAME_PREFIX "Set",			/*tp_name*/
  sizeof(Bucket),		/*tp_basicsize*/
  0,				/*tp_itemsize*/
  /*********** methods ***********************/
  (destructor) Bucket_dealloc,	/*tp_dealloc*/
  (printfunc)0,			/*tp_print*/
  (getattrfunc)0,		/*obsolete tp_getattr*/
  (setattrfunc)0,		/*obsolete tp_setattr*/
  (cmpfunc)0,			/*tp_compare*/
  (reprfunc) set_repr,		/*tp_repr*/
  0,				/*tp_as_number*/
  &set_as_sequence,		/*tp_as_sequence*/
  0,		                /*tp_as_mapping*/
  (hashfunc)0,			/*tp_hash*/
  (ternaryfunc)0,		/*tp_call*/
  (reprfunc)0,			/*tp_str*/
  (getattrofunc)0,		/*tp_getattro*/
  0,				/*tp_setattro*/
  
  /* Space for future expansion */
  0L,0L,
  "Set implemented as sorted keys", 
  METHOD_CHAIN(Set_methods),
  EXTENSIONCLASS_BASICNEW_FLAG 
#ifdef PERSISTENT
  | PERSISTENT_TYPE_FLAG 
#endif
  | EXTENSIONCLASS_NOINSTDICT_FLAG,
};

static int 
nextSet(SetIteration *i)
{
          
  if (i->position >= 0)
    {
      UNLESS(PER_USE(BUCKET(i->set))) return -1;

      if (i->position)
        {
          DECREF_KEY(i->key);
        }

      if (i->position < BUCKET(i->set)->len)
        {
          COPY_KEY(i->key, BUCKET(i->set)->keys[i->position]);
          INCREF_KEY(i->key);
          i->position ++;
        }
      else
        {
          i->position = -1;
          PER_ACCESSED(BUCKET(i->set));
        }

      PER_ALLOW_DEACTIVATION(BUCKET(i->set));
    }

          
  return 0;
}
