/usr/lib/python2.7/dist-packages/ffc/backends/dolfin/form.py is in python-ffc 2016.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2011 Marie E. Rognes
#
# This file is part of DOLFIN.
#
# DOLFIN is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# DOLFIN is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
#
# Based on original implementation by Martin Alnes and Anders Logg
#
# Modified by Anders Logg 2015
#
# Last changed: 2016-03-02
from .includes import snippets
from .functionspace import *
from .goalfunctional import generate_update_ec
__all__ = ["generate_form"]
def generate_form(form, classname, error_control):
"""Generate dolfin wrapper code associated with a form including
code for function spaces used in form and typedefs
@param form:
A UFCFormNames instance
@param classname
Name of Form class.
"""
blocks = []
# Generate code for Form_x_FunctionSpace_y subclasses
wrap = apply_function_space_template
blocks += [wrap("%s_FunctionSpace_%d" % (classname, i),
form.ufc_finite_element_classnames[i],
form.ufc_dofmap_classnames[i]) for i in range(form.rank)]
# Generate code for Form_x_MultiMeshFunctionSpace_y subclasses
wrap = apply_multimesh_function_space_template
if not error_control: # FIXME: Issue #91
blocks += [wrap("%s_MultiMeshFunctionSpace_%d" % (classname, i),
"%s_FunctionSpace_%d" % (classname, i),
form.ufc_finite_element_classnames[i],
form.ufc_dofmap_classnames[i]) for i in range(form.rank)]
# Add typedefs CoefficientSpace_z -> Form_x_FunctionSpace_y
blocks += ["typedef CoefficientSpace_%s %s_FunctionSpace_%d;\n"
% (form.coefficient_names[i], classname, form.rank + i)
for i in range(form.num_coefficients)]
# Generate Form subclass
blocks += [generate_form_class(form, classname, error_control)]
# Return code
return "\n".join(blocks)
def generate_form_class(form, classname, error_control):
"Generate dolfin wrapper code for a single Form class."
# Generate constructors
constructors = generate_form_constructors(form, classname)
multimesh_constructors = generate_multimesh_form_constructors(form, classname)
# Generate data for coefficient assignments
(number, name) = generate_coefficient_map_data(form)
# Generate typedefs for FunctionSpace subclasses for Coefficients
typedefs = [" // Typedefs", generate_typedefs(form, classname, error_control), ""]
# Member variables for coefficients
members = [" dolfin::CoefficientAssigner %s;" % coefficient
for coefficient in form.coefficient_names]
if form.superclassname == "GoalFunctional":
members += [generate_update_ec(form)]
# Group typedefs and members together for inserting into template
additionals = "\n".join(typedefs + [" // Coefficients"] + members)
# Wrap functions in class body
code = ""
code += apply_form_template(classname, constructors, number, name,
additionals, form.superclassname)
code += "\n"
if not error_control:
code += apply_multimesh_form_template(classname, multimesh_constructors, number, name,
additionals, form.superclassname)
# Return code
return code
def generate_coefficient_map_data(form):
"""Generate data for code for the functions
Form::coefficient_number and Form::coefficient_name."""
# Write error if no coefficients
if form.num_coefficients == 0:
message = '''\
dolfin::dolfin_error("generated code for class %s",
"access coefficient data",
"There are no coefficients");''' % form.superclassname
num = "\n %s\n return 0;" % message
name = '\n %s\n return "unnamed";' % message
return (num, name)
# Otherwise create switch
ifstr = "if "
num = ""
name = ' switch (i)\n {\n'
for i, coeff in enumerate(form.coefficient_names):
num += ' %s(name == "%s")\n return %d;\n' % (ifstr, coeff, i)
name += ' case %d:\n return "%s";\n' % (i, coeff)
ifstr = 'else if '
# Create final return
message = '''\
dolfin::dolfin_error("generated code for class %s",
"access coefficient data",
"Invalid coefficient");''' % form.superclassname
num += "\n %s\n return 0;" % message
name += ' }\n\n %s\n return "unnamed";' % message
return (num, name)
def generate_form_constructors(form, classname):
"""Generate the dolfin::Form constructors for different
combinations of references/shared pointers etc."""
# FIXME: This can be simplied now that we don't create reference version
coeffs = ("shared_ptr_coefficient",)
spaces = ("shared_ptr_space",)
# Treat functionals a little special
if form.rank == 0:
spaces = ("shared_ptr_mesh",)
# Generate permutations of constructors
constructors = []
for space in spaces:
constructors += [generate_constructor(form, classname, space)]
if form.num_coefficients > 0:
constructors += [generate_constructor(form, classname, space, coeff)
for coeff in coeffs]
# Return joint constructor code
return "\n\n".join(constructors)
def generate_multimesh_form_constructors(form, classname):
"""Generate the dolfin::MultiMeshForm constructors for different
combinations of references/shared pointers etc."""
# FIXME: This can be simplied now that we don't create reference version
coeffs = ("shared_ptr_coefficient",)
spaces = ("multimesh_shared_ptr_space",)
# Treat functionals a little special
if form.rank == 0:
spaces = ("shared_ptr_multimesh",)
# Generate permutations of constructors
constructors = []
for space in spaces:
constructors += [generate_multimesh_constructor(form, classname, space)]
if form.num_coefficients > 0:
constructors += [generate_multimesh_constructor(form, classname,
space, coeff)
for coeff in coeffs]
# Return joint constructor code
return "\n\n".join(constructors)
def generate_constructor(form, classname, space_tag, coefficient_tag=None):
"Generate a single Form constructor according to the given parameters."
# Extract correct code snippets
(argument, assign) = snippets[space_tag]
# Construct list of arguments and function space assignments
name = "V%d"
if form.rank > 0:
arguments = [argument % (name % i) for i in reversed(range(form.rank))]
assignments = [assign % (i, name % i) for i in range(form.rank)]
else:
arguments = [argument]
assignments = [assign]
# Add coefficients to argument/assignment lists if specified
if coefficient_tag is not None:
(argument, assign) = snippets[coefficient_tag]
arguments += [argument % name for name in form.coefficient_names]
if form.rank > 0: # FIXME: To match old generated code only
assignments += [""]
assignments += [assign % (name, name) for name in form.coefficient_names]
# Add assignment of _ufc_form variable
line = "\n _ufc_form = std::make_shared<const %s>();"
# FIXME: To match old generated code only
if form.rank == 0 and coefficient_tag is None:
line = " _ufc_form = std::make_shared<const %s>();"
assignments += [line % form.ufc_form_classname]
# Construct list for initialization of Coefficient references
initializers = ["%s(*this, %d)" % (name, number)
for (number, name) in enumerate(form.coefficient_names)]
# Join lists together
arguments = ", ".join(arguments)
initializers = ", " + ", ".join(initializers) if initializers else ""
body = "\n".join(assignments)
# Wrap code into template
args = {"classname": classname,
"rank": form.rank,
"num_coefficients": form.num_coefficients,
"arguments": arguments,
"initializers": initializers,
"body": body,
"superclass": form.superclassname
}
code = form_constructor_template % args
return code
def generate_multimesh_constructor(form, classname, space_tag,
coefficient_tag=None):
"Generate a single Form constructor according to the given parameters."
# Extract correct code snippets
(argument, dummy) = snippets[space_tag]
# Construct list of arguments
name = "V%d"
if form.rank > 0:
arguments = [argument % (name % i) for i in reversed(range(form.rank))]
spaces = [name % i for i in reversed(range(form.rank))]
else:
arguments = [argument]
spaces = "mesh"
# Add coefficients to argument/assignment lists if specified
assignments = []
if coefficient_tag is not None:
(argument, assign) = snippets[coefficient_tag]
arguments += [argument % name for name in form.coefficient_names]
if form.rank > 0: # FIXME: To match old generated code only
assignments += [""]
assignments += [assign % (name, name) for name in form.coefficient_names]
# Construct list for initialization of Coefficient references
initializers = ["%s(*this, %d)" % (name, number)
for (number, name) in enumerate(form.coefficient_names)]
# Join lists together
arguments = ", ".join(arguments)
initializers = ", " + ", ".join(initializers) if initializers else ""
# Ignore if functional
if form.rank != 0:
spaces = ", ".join(spaces)
# Set access method
if space_tag == "multimesh_shared_ptr_space":
access = "->"
else:
access = "."
# Create body for building multimesh function space
body = ""
body += " // Create and add standard forms\n"
body += " std::size_t num_parts = V0%snum_parts(); // assume all equal and pick first\n" % access
body += " for (std::size_t part = 0; part < num_parts; part++)\n"
body += " {\n"
body += " std::shared_ptr<dolfin::Form> a(new %s(%s));\n" % (classname, ", ".join("V%d%spart(part)" % (i, access) for i in reversed(range(form.rank))))
body += " add(a);\n\n"
body += " }\n"
body += " // Build multimesh form\n"
body += " build();\n"
# FIXME: Issue #91
if form.rank == 0:
body = ""
body += " // Creating a form for each part of the mesh\n"
body += " for (std::size_t i=0; i< mesh->num_parts(); i++)\n"
body += " {\n"
body += " std::shared_ptr<dolfin::Form> a(new %s(mesh->part(i))); " % (classname)
body += " add(a);"
body += " }\n"
body += " // Build multimesh form\n"
body += " build();\n"
# Create body for assigning coefficients
body += "\n /// Assign coefficients"
body += "\n".join(assignments) + "\n"
# Wrap code into template
args = {"classname": classname,
"rank": form.rank,
"num_coefficients": form.num_coefficients,
"arguments": arguments,
"spaces": spaces,
"initializers": initializers,
"body": body,
"superclass": form.superclassname
}
code = multimesh_form_constructor_template % args
return code
form_class_template = """\
class %(classname)s: public dolfin::%(superclass)s
{
public:
%(constructors)s
// Destructor
~%(classname)s()
{}
/// Return the number of the coefficient with this name
virtual std::size_t coefficient_number(const std::string& name) const
{
%(coefficient_number)s
}
/// Return the name of the coefficient with this number
virtual std::string coefficient_name(std::size_t i) const
{
%(coefficient_name)s
}
%(members)s
};
"""
multimesh_form_class_template = """\
class MultiMesh%(classname)s: public dolfin::MultiMesh%(superclass)s
{
public:
%(constructors)s
// Destructor
~MultiMesh%(classname)s()
{}
/// Return the number of the coefficient with this name
virtual std::size_t coefficient_number(const std::string& name) const
{
%(coefficient_number)s
}
/// Return the name of the coefficient with this number
virtual std::string coefficient_name(std::size_t i) const
{
%(coefficient_name)s
}
%(members)s
};
"""
# Template code for Form constructor
form_constructor_template = """\
// Constructor
%(classname)s(%(arguments)s):
dolfin::%(superclass)s(%(rank)d, %(num_coefficients)d)%(initializers)s
{
%(body)s
}"""
multimesh_form_constructor_template = """\
// Constructor
MultiMesh%(classname)s(%(arguments)s):
dolfin::MultiMesh%(superclass)s(%(spaces)s)%(initializers)s
{
%(body)s
}"""
def apply_form_template(classname, constructors, number, name, members,
superclass):
args = {"classname": classname,
"superclass": superclass,
"constructors": constructors,
"coefficient_number": number,
"coefficient_name": name,
"members": members}
return form_class_template % args
def apply_multimesh_form_template(classname, constructors, number, name,
members, superclass):
members = members.replace("CoefficientAssigner",
"MultiMeshCoefficientAssigner") # hack
args = {"classname": classname,
"superclass": superclass,
"constructors": constructors,
"coefficient_number": number,
"coefficient_name": name,
"members": members}
return multimesh_form_class_template % args
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