t4_e3.cc

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//
// Copyright (c) 2014 Limit Point Systems, Inc. 
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//


#include "SheafSystem/t4_e3.impl.h"

#include "SheafSystem/abstract_poset_member.impl.h"
#include "SheafSystem/assert_contract.h"
#include "SheafSystem/at0.h"
#include "SheafSystem/at1_space.h"
#include "SheafSystem/fiber_bundles_namespace.h"
#include "SheafSystem/schema_poset_member.h"
#include "SheafSystem/wsv_block.h"

#include "SheafSystem/tp_space.h"
#include "SheafSystem/std_sstream.h"

using namespace std;
using namespace fiber_bundle; // Workaround for MS C++ bug.


//==============================================================================
// CLASS T4_E3_LITE
//==============================================================================

//==============================================================================
// T4_E3 FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

fiber_bundle::t4_e3_lite::
t4_e3_lite()
{

  // Preconditions:

  // Body:

  // Postconditions:

  ensure(invariant());

  // Exit:
}

fiber_bundle::t4_e3_lite::
t4_e3_lite(const t4_e3_lite& xother)
{
  // Preconditions:

  // Body:

  *this = xother;

  // Postconditions:

  ensure(invariant());

  // Exit:
}

fiber_bundle::t4_e3_lite&
fiber_bundle::t4_e3_lite::
operator=(const t4_e3_lite& xother)
{

  // Preconditions:

  // Body:

  if(this == &xother)
    return *this;

  _row_dofs = xother._row_dofs;

  // Postconditions:

  ensure(invariant());
  ensure_for_all(i, 0, d(), component(i) == xother[i]); 

  // Exit:

  return *this;
}

fiber_bundle::t4_e3_lite::
~t4_e3_lite()
{
  // Preconditions:

  // Body:

  // Postconditions:

  // Exit:

}

fiber_bundle::t4_e3_lite::
t4_e3_lite(const row_dofs_type& xrow_dofs)
{
  // Preconditions:

  // Body:

  *this = xrow_dofs;

  // Postconditions:

  ensure(invariant());

  // Exit:
}

fiber_bundle::t4_e3_lite&
fiber_bundle::t4_e3_lite::
operator=(const row_dofs_type& xrow_dofs)
{
  // Preconditions:

  // Body:

  _row_dofs = xrow_dofs;

  // Postconditions:

  ensure(invariant());

  // Exit:

  return *this;

}

fiber_bundle::t4_e3_lite::
operator t4_e3_lite::row_dofs_type& ()
{
  // Preconditions:

  // Body:

  row_dofs_type& result = _row_dofs;

  // Postconditions:

  // Exit:

  return result;
}

fiber_bundle::t4_e3_lite::
operator const t4_e3_lite::row_dofs_type& () const
{
  // Preconditions:

  // Body:

  const row_dofs_type& result = _row_dofs;

  // Postconditions:

  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// T4 FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// TENSOR ALGEBRA (TP) FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

int
fiber_bundle::t4_e3_lite::
dd() const
{
  // Preconditions:

  // Body:

  int result = 3;

  // Postconditions:

  ensure(invariant());
  ensure(result == 3);

  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// VECTOR ALGEBRA (VD) FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

const fiber_bundle::tp_lite&
fiber_bundle::t4_e3_lite::
tp_prototype(int xp) const
{
  // Preconditions:

  require(precondition_of(e3_lite::static_tp_prototype(xp)));
  
  // Body:

  const tp_lite& result = e3_lite::static_tp_prototype(xp);

  // Postconditions:

  ensure(postcondition_of(e3_lite::static_tp_prototype(xp)));
  
  // Exit:

  return result;
}

const fiber_bundle::atp_lite&
fiber_bundle::t4_e3_lite::
atp_prototype(int xp) const
{
  // Preconditions:

  require(precondition_of(e3_lite::static_atp_prototype(xp)));
  
  // Body:

  const atp_lite& result = e3_lite::static_atp_prototype(xp);

  // Postconditions:

  ensure(postcondition_of(e3_lite::static_atp_prototype(xp)));
  
  // Exit:

  return result;
}

const fiber_bundle::stp_lite&
fiber_bundle::t4_e3_lite::
stp_prototype(int xp) const
{
  // Preconditions:

  require(precondition_of(e3_lite::static_stp_prototype(xp)));
  
  // Body:

  const stp_lite& result = e3_lite::static_stp_prototype(xp);

  // Postconditions:

  ensure(postcondition_of(e3_lite::static_stp_prototype(xp)));
  
  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// CARTESIAN ALGEBRA (TUPLE) FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// ABSTRACT POSET MEMBER FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

const std::string&
fiber_bundle::t4_e3_lite::
class_name() const
{
  // Preconditions:

  // Body:

  const string& result = static_class_name();

  // Postconditions:

  ensure(!result.empty());

  // Exit:

  return result;
}

const std::string&
fiber_bundle::t4_e3_lite::
static_class_name()
{
  // Preconditions:

  // Body:

  static const string result("t4_e3_lite");

  // Postconditions:

  ensure(!result.empty());

  // Exit:

  return result;
}

fiber_bundle::t4_e3_lite*
fiber_bundle::t4_e3_lite::
clone() const
{
  t4_e3_lite* result = 0;

  // Preconditions:

  // Body:

  result = new t4_e3_lite();

  // Postconditions:

  ensure(result != 0);
  ensure(is_same_type(*result));

  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// ANY FACET OF CLASS T4_E3_LITE
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

bool
fiber_bundle::t4_e3_lite::
is_ancestor_of(const any_lite& xother) const
{
  // Preconditions:

  require(&xother != 0);

  // Body:

  // True if other conforms to this.

  bool result = dynamic_cast<const t4_e3_lite*>(&xother) != 0;

  // Postconditions:

  return result;
}

bool
fiber_bundle::t4_e3_lite::
invariant() const
{
  bool result = true;

  if(invariant_check())
  {
    // Prevent recursive calls to invariant.

    disable_invariant_check();

    // Must satisfy base class invariant.

    invariance(t4_lite::invariant());

    // Invariances for this class:

    // Finished, turn invariant checking back on.

    enable_invariant_check();
  }

  // Exit

  return result;
}

void*
fiber_bundle::t4_e3_lite::
row_dofs()
{
  return &_row_dofs;
}

const void*
fiber_bundle::t4_e3_lite::
row_dofs() const
{
  return &_row_dofs;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// CLASS T4_E3
//==============================================================================

// ===========================================================
// HOST FACTORY FACET OF CLASS T4_E3
// ===========================================================

// PUBLIC MEMBER FUNCTIONS

const sheaf::poset_path&
fiber_bundle::t4_e3::
standard_schema_path()
{
  // Preconditions:


  // Body:

  static const poset_path result(standard_schema_poset_name(), "t4_e3_schema");

  // Postconditions:

  // Exit:

  return result;
}

void
fiber_bundle::t4_e3::
make_standard_schema(namespace_poset& xns)
{
  // Preconditions:

  require(xns.state_is_read_write_accessible());
  require(xns.contains_poset(standard_schema_poset_name()));
  require(!xns.contains_poset_member(standard_schema_path()));

  // Body:

  string lcomp_names[81] = {
    "xxxx","xxxy","xxxz","xxyx","xxyy","xxyz","xxzx","xxzy","xxzz",
    "xyxx","xyxy","xyxz","xyyx","xyyy","xyyz","xyzx","xyzy","xyzz",
    "xzxx","xzxy","xzxz","xzyx","xzyy","xzyz","xzzx","xzzy","xzzz",
    "yxxx","yxxy","yxxz","yxyx","yxyy","yxyz","yxzx","yxzy","yxzz",
    "yyxx","yyxy","yyxz","yyyx","yyyy","yyyz","yyzx","yyzy","yyzz",
    "yzxx","yzxy","yzxz","yzyx","yzyy","yzyz","yzzx","yzzy","yzzz",
    "zxxx","zxxy","zxxz","zxyx","zxyy","zxyz","zxzx","zxzy","zxzz",
    "zyxx","zyxy","zyxz","zyyx","zyyy","zyyz","zyzx","zyzy","zyzz",
    "zzxx","zzxy","zzxz","zzyx","zzyy","zzyz","zzzx","zzzy","zzzz"};

  ostringstream los;
  for(int i=0; i<81; ++i)
  {
    los << lcomp_names[i] << " DOUBLE false ";
  }

  string lmember_names = los.str();

  schema_poset_member lschema(xns,
                              standard_schema_path().member_name(),
                              t4::standard_schema_path(),
                              lmember_names,
                              false);

  lschema.detach_from_state();

  // Postconditions:

  ensure(xns.contains_poset_member(standard_schema_path()));

  // Exit:

  return;
}

fiber_bundle::t4_e3::host_type&
fiber_bundle::t4_e3::
new_host(namespace_type& xns, 
         const poset_path& xhost_path, 
         const poset_path& xschema_path, 
         const poset_path& xvector_space_path, 
         bool xauto_access)
{
  // cout << endl << "Entering t4_e3::new_host." << endl;

  // Preconditions:

  require(xns.state_is_auto_read_write_accessible(xauto_access));

  require(!xhost_path.empty());
  require(!xns.contains_path(xhost_path, xauto_access));

  require(xschema_path.full());
  require(xns.path_is_auto_read_accessible(xschema_path, xauto_access));
  require(schema_poset_member::conforms_to(xns, xschema_path, standard_schema_path()));
  require(schema_poset_member::row_dof_ct(xns, xschema_path, xauto_access) == 81);
  
  require(xns.path_is_auto_read_accessible(xvector_space_path, xauto_access));
  require(xns.contains_poset<vector_space_type::host_type>(xvector_space_path, xauto_access));
  require(xns.member_poset(xvector_space_path, xauto_access).schema(xauto_access).conforms_to(vector_space_type::standard_schema_path()));
  require(xns.member_poset<vector_space_type::host_type>(xvector_space_path, xauto_access).d(xauto_access) == 3);

  require(host_type::d(xns, xschema_path, xauto_access) == host_type::d(xns, 4, xvector_space_path, xauto_access));   

  // Body:

  host_type& result =
    host_type::new_table(xns, xhost_path, xschema_path, 4, xvector_space_path, xauto_access);

  // Postconditions:

  ensure(xns.owns(result, xauto_access));
  ensure(result.path(true) == xhost_path);
  ensure(result.state_is_not_read_accessible());
  ensure(result.schema(true).path(xauto_access) == xschema_path);

  ensure(result.factor_ct(true) == 81);
  ensure(result.d(true) == 81);
  ensure(result.scalar_space_path(true) == xns.member_poset<vector_space_type::host_type>(xvector_space_path, xauto_access).scalar_space_path());
  ensure(result.p(true) == 4);
  ensure(result.dd(true) == 3);
  ensure(result.vector_space_path(true) == xvector_space_path);

  // Exit:

  // cout << "Leaving t4_e3::new_host." << endl;
  return result;
}

fiber_bundle::t4_e3::host_type&
fiber_bundle::t4_e3::
standard_host(namespace_type& xns, const std::string& xsuffix, bool xauto_access)
{
  // cout << endl << "Entering t4_e3::new_host." << endl;

  // Preconditions:

  require(xns.state_is_auto_read_write_accessible(xauto_access));

  require(xsuffix.empty() || poset_path::is_valid_name(xsuffix));
  require(standard_host_is_available<t4_e3>(xns, xsuffix, xauto_access));

  require(xns.path_is_auto_read_accessible(standard_schema_path(), xauto_access));
  
  require(xns.path_is_auto_read_available(standard_host_path<vector_space_type>(xsuffix), xauto_access));

  // Body:

  // Create the vector space if necessary.

  poset_path lvector_space_path = vector_space_type::standard_host(xns, xsuffix, xauto_access).path(true);

  poset_path lpath(standard_host_path<t4_e3>(xsuffix));

  host_type* result_ptr;
  if(xns.contains_path(lpath, xauto_access))
  {
    result_ptr = &xns.member_poset<host_type>(lpath, xauto_access);
  }
  else
  {
    result_ptr = &new_host(xns, lpath, standard_schema_path(), lvector_space_path, xauto_access);
  }

  host_type& result = *result_ptr;

  // Postconditions:

  ensure(xns.owns(result, xauto_access));
  ensure(result.path(true) == standard_host_path<t4_e3>(xsuffix));
  ensure(result.state_is_not_read_accessible());
  ensure(result.schema(true).path(xauto_access) == standard_schema_path());

  ensure(result.factor_ct(true) == 81);
  ensure(result.d(true) == 81);
  ensure(result.scalar_space_path(true) == standard_host_path<vector_space_type::scalar_type>(xsuffix) );
  ensure(result.p(true) == 4);
  ensure(result.dd(true) == 3);
  ensure(result.vector_space_path(true) == standard_host_path<vector_space_type>(xsuffix) );

  // Exit:

  // cout << "Leaving t4_e3::new_host." << endl;
  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS
 

//==============================================================================
// T4_E3 FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

fiber_bundle::t4_e3::
t4_e3()
{
  // Preconditions:

  // Body:

  // Postconditions:

  ensure(invariant());

  // Exit:

  return;
}

fiber_bundle::t4_e3::
t4_e3(const t4_e3& xother)
{

  // Preconditions:


  // Body:

  attach_to_state(&xother);

  // Postconditions:

  ensure(invariant());

  // Exit:

  return;
}

fiber_bundle::t4_e3&
fiber_bundle::t4_e3::
operator=(const abstract_poset_member& xother)
{
  // Preconditions:

  require(is_ancestor_of(&xother));
  require(precondition_of(attach_to_state(&xother)));

  // Body:

  attach_to_state(&xother);

  // Postconditions:

  ensure(postcondition_of(attach_to_state(&xother)));

  // Exit:

  return *this;
}

fiber_bundle::t4_e3&
fiber_bundle::t4_e3::
operator=(const t4_e3& xother)
{
  // Preconditions:

  require(precondition_of(attach_to_state(&xother)));

  // Body:

  attach_to_state(&xother);

  // Postconditions:

  ensure(postcondition_of(attach_to_state(&xother)));

  // Exit:

  return *this;
}

fiber_bundle::t4_e3::
~t4_e3()
{

  // Preconditions:

  // Body:

  // Postconditions:

  // Exit:

  return;
}

const fiber_bundle::t4_e3::volatile_type&
fiber_bundle::t4_e3::
lite_prototype() const
{
  // Preconditions:

  // Body:

  static const volatile_type result;

  // Postconditions:

  // Exit:

  return result;
}

fiber_bundle::t4_e3::volatile_type*
fiber_bundle::t4_e3::
lite_type() const
{
  // Preconditions:

  // Body:

  volatile_type* result = new volatile_type(sheaf::row_dofs(*this));

  // Postconditions:

  // Exit:

  return result;
}


fiber_bundle::t4_e3::
t4_e3(poset* xhost, bool xauto_access)
{

  // Preconditions:

  require(precondition_of(new_jim_state(xhost, 0, false, xauto_access)));

  // Body:

  new_jim_state(xhost, 0, false, xauto_access);

  // Postconditions:

  ensure(postcondition_of(new_jim_state(xhost, 0, false, xauto_access)));

  // Exit:

  return;
}

fiber_bundle::t4_e3::
t4_e3(poset_state_handle& xhost,
       const row_dofs_type& xrdt,
       bool xauto_access)
{

  // Preconditions:

  require(precondition_of(new_jim_state(&xhost, 0, false, xauto_access)));

  // Body:

  new_jim_state(&xhost, 0, false, xauto_access);

  if(xauto_access)
  {
    xhost.get_read_write_access();
  }

  *this = xrdt;

  if(xauto_access)
  {
    xhost.release_access();
  }

  // Postconditions:

  ensure(postcondition_of(new_jim_state(&xhost, 0, false, xauto_access)));

  // Exit:

  return;
}

fiber_bundle::t4_e3&
fiber_bundle::t4_e3::
operator=(const row_dofs_type& xrdt)
{
  // Preconditions:

  require(state_is_read_write_accessible());

  // Body:

  sheaf::row_dofs(*this) = xrdt;

  // Postconditions:

  ensure_for_all(i, 0, d(), component(i) == xrdt.components[i]);

  // Exit:

  return *this;

}

fiber_bundle::t4_e3::
t4_e3(const poset* xhost, pod_index_type xhub_id)
{
  // Preconditions:

  require(xhost != 0);
  require(xhost->state_is_read_accessible());
  require(xhost->contains_member(xhub_id));

  // Body:

  attach_to_state(xhost, xhub_id);

  // Postconditions:

  ensure(invariant());
  ensure(is_attached());
  // ensure(host() == xhost);
  ensure(index() == xhub_id);
}

fiber_bundle::t4_e3::
t4_e3(const poset* xhost, const scoped_index& xid)
{
  // Preconditions:

  require(xhost != 0);
  require(xhost->state_is_read_accessible());
  require(xhost->contains_member(xid));

  // Body:

  attach_to_state(xhost, xid.hub_pod());

  // Postconditions:

  ensure(invariant());
  ensure(is_attached());
  // ensure(host() == xhost);
  ensure(index() ==~ xid);
}

fiber_bundle::t4_e3::
t4_e3(const poset* xhost, const std::string& xname)
{

  // Preconditions:

  require(xhost != 0);
  require(xhost->state_is_read_accessible());
  require(!xname.empty());
  require(xhost->contains_member(xname));

  // Body:

  attach_to_state(xhost, xname);

  // Postconditions:

  ensure(invariant());
  ensure(is_attached());
  // ensure(host() == xhost);
  ensure(name() == xname);

}

fiber_bundle::t4_e3::
operator t4_e3::row_dofs_type& ()
{
  // Preconditions:

  require(state_is_read_write_accessible());

  // Body:

  row_dofs_type& result = sheaf::row_dofs(*this);

  // Postconditions:

  // Exit:

  return result;
}

fiber_bundle::t4_e3::
operator const t4_e3::row_dofs_type& () const
{
  // Preconditions:

  require(state_is_read_accessible());

  // Body:

  const row_dofs_type& result = sheaf::row_dofs(*this);

  // Postconditions:

  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// T4 FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// TP FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// VD FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// TUPLE FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

fiber_bundle::tp*
fiber_bundle::t4_e3::
new_tp(int xp, bool xauto_access) const
{
  // Preconditions:

  require(precondition_of(e3::new_tp(vector_space(xauto_access), xp)));

  // Body:

  tp* result = e3::new_tp(vector_space(xauto_access), xp);

  // Postconditions:

  ensure(postcondition_of(e3::new_tp(vector_space(xauto_access), xp)));

  // Exit:

  return result;
}

fiber_bundle::atp*
fiber_bundle::t4_e3::
new_atp(int xp, bool xauto_access) const
{
  // Preconditions:

  require(precondition_of(e3::new_atp(vector_space(xauto_access), xp)));

  // Body:

  atp* result = e3::new_atp(vector_space(xauto_access), xp);

  // Postconditions:

  ensure(postcondition_of(e3::new_atp(vector_space(xauto_access), xp)));

  // Exit:

  return result;
}

fiber_bundle::stp*
fiber_bundle::t4_e3::
new_stp(int xp, bool xauto_access) const
{
  // Preconditions:

  require(precondition_of(e3::new_stp(vector_space(xauto_access), xp)));

  // Body:

  stp* result = e3::new_stp(vector_space(xauto_access), xp);

  // Postconditions:

  ensure(postcondition_of(e3::new_stp(vector_space(xauto_access), xp)));

  // Exit:

  return result;
}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// ABSTRACT POSET MEMBER FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS

const std::string&
fiber_bundle::t4_e3::
class_name() const
{
  // Preconditions:

  // Body:

  const string& result = static_class_name();

  // Postconditions:

  ensure(!result.empty());

  // Exit:

  return result;
}

const std::string&
fiber_bundle::t4_e3::
static_class_name()
{
  // Preconditions:

  // Body:

  static const string result("t4_e3");

  // Postconditions:

  ensure(!result.empty());

  // Exit:

  return result;
}

fiber_bundle::t4_e3*
fiber_bundle::t4_e3::
clone() const
{

  // Preconditions:

  // Body:

  // Create new handle of the current class.

  t4_e3 *result = new t4_e3();

  // Postconditions:

  ensure(result != 0);
  ensure(result->invariant());

  // Exit:

  return result;

}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// ANY FACET OF CLASS T4_E3
//==============================================================================

// PUBLIC MEMBER FUNCTIONS


bool
fiber_bundle::t4_e3::
invariant() const
{
  bool result = true;

  // Body:

  if(invariant_check())
  {
    // Prevent recursive calls to invariant.

    disable_invariant_check();

    // Must satisfy base class invariant.

    invariance(t4::invariant());

    // Invariances for this class:

    invariance(state_is_read_accessible() ? dd() == 3 : true);

    // Finished, turn invariant checking back on.

    enable_invariant_check();
  }

  // Exit:

  return result;
}

bool
fiber_bundle::t4_e3::
is_ancestor_of(const any* xother) const
{
  // Preconditions:

  require(xother != 0);

  // Body:

  // True if xother conforms to this.

  bool result = dynamic_cast<const t4_e3*>(xother) != 0;

  // Postconditions:

  ensure(invariant());

  // Exit:

  return result;

}

// PROTECTED MEMBER FUNCTIONS

// PRIVATE MEMBER FUNCTIONS


//==============================================================================
// NON-MEMBER FUNCTIONS
//==============================================================================

#include "SheafSystem/st4_e3.h"

void
fiber_bundle::tp_algebra::
sym(const t4_e3_lite& x0, st4_e3_lite& xresult)
{
  // Preconditions:

  // Body:

  //@todo Implement a more efficient version using knowledge
  //      about the components.

  int ldd = x0.dd();

  for(int i=0; i<ldd; ++i)
  {
    for(int j=i; j<ldd; ++j)
    {
      for(int k=j; k<ldd; ++k)
      {
        for(int l=k; l<ldd; ++l)
        {
          vd_value_type lvalue = x0.component(i,j,k,l)
                               + x0.component(i,j,l,k)
                               + x0.component(i,k,j,l)
                               + x0.component(i,l,j,k)
                               + x0.component(i,k,l,j)
                               + x0.component(i,l,k,j)
                               + x0.component(j,i,k,l)
                               + x0.component(j,i,l,k)
                               + x0.component(k,i,j,l)
                               + x0.component(l,i,j,k)
                               + x0.component(k,i,l,j)
                               + x0.component(l,i,k,j)
                               + x0.component(j,k,i,l)
                               + x0.component(j,l,i,k)
                               + x0.component(k,j,i,l)
                               + x0.component(l,j,i,k)
                               + x0.component(k,l,i,j)
                               + x0.component(l,k,i,j)
                               + x0.component(j,k,l,i)
                               + x0.component(j,l,k,i)
                               + x0.component(k,j,l,i)
                               + x0.component(l,j,k,i)
                               + x0.component(k,l,j,i)
                               + x0.component(l,k,j,i);

          lvalue /= 24.0; // 4!
          xresult.put_component(i, j, k, l, lvalue);
        }
      }
    }
  }

  // Postconditions:

  ensure(unexecutable("xresult is equal to the symmetric part of x0"));

  // Exit:

  return;
}

void
fiber_bundle::tp_algebra::
sym(const t4_e3& x0, st4_e3& xresult, bool xauto_access)
{
  // Preconditions:

  require(x0.state_is_auto_read_accessible(xauto_access));
  require(xresult.state_is_auto_read_accessible(xauto_access));
  require(!x0.variance(xauto_access).is_mixed());

  // Body:

  if(xauto_access)
  {
    x0.get_read_access();
    xresult.get_read_write_access(true);
  }

  int ldd = x0.dd();

  for(int i=0; i<ldd; ++i)
  {
    for(int j=i; j<ldd; ++j)
    {
      for(int k=j; k<ldd; ++k)
      {
        for(int l=k; l<ldd; ++l)
        {
          vd_value_type lvalue = x0.component(i,j,k,l)
                               + x0.component(i,j,l,k)
                               + x0.component(i,k,j,l)
                               + x0.component(i,l,j,k)
                               + x0.component(i,k,l,j)
                               + x0.component(i,l,k,j)
                               + x0.component(j,i,k,l)
                               + x0.component(j,i,l,k)
                               + x0.component(k,i,j,l)
                               + x0.component(l,i,j,k)
                               + x0.component(k,i,l,j)
                               + x0.component(l,i,k,j)
                               + x0.component(j,k,i,l)
                               + x0.component(j,l,i,k)
                               + x0.component(k,j,i,l)
                               + x0.component(l,j,i,k)
                               + x0.component(k,l,i,j)
                               + x0.component(l,k,i,j)
                               + x0.component(j,k,l,i)
                               + x0.component(j,l,k,i)
                               + x0.component(k,j,l,i)
                               + x0.component(l,j,k,i)
                               + x0.component(k,l,j,i)
                               + x0.component(l,k,j,i);

          lvalue /= 24.0; // 4!
          xresult.put_component(i, j, k, l, lvalue);
        }
      }
    }
  }

  // Set the variance of the result.
  // Variance of result is same as variance of x0.

  xresult.put_variance(x0.variance(false), false);

  if(xauto_access)
  {
    x0.release_access();
    xresult.release_access();
  }

  // Postconditions:

  ensure(xresult.variance(xauto_access) == x0.variance(xauto_access));
  ensure(unexecutable("xresult is equal to the antisymmetric part of x0"));

  // Exit:

  return;
}