/usr/lib/python2.7/dist-packages/ffc/uflacs/uflacsgenerator.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) 2013-2016 Martin Sandve Alnæs
#
# This file is part of FFC.
#
# FFC 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.
#
# FFC 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 FFC. If not, see <http://www.gnu.org/licenses/>.
"""Controlling algorithm for building the tabulate_tensor
source structure from factorized representation."""
from ffc.log import info
from ffc.representationutils import initialize_integral_code
from ffc.uflacs.backends.ffc.backend import FFCBackend
from ffc.uflacs.generation.integralgenerator import IntegralGenerator
from ffc.uflacs.language.format_lines import format_indented_lines
def generate_integral_code(ir, prefix, parameters):
"Generate code for integral from intermediate representation."
info("Generating code from ffc.uflacs representation")
# Generate generic ffc code snippets
code = initialize_integral_code(ir, prefix, parameters)
# Generate tabulate_tensor body using uflacs algorithms
uflacs_code = generate_tabulate_tensor_code(ir, prefix, parameters)
code["tabulate_tensor"] = uflacs_code["tabulate_tensor"]
# TODO: Use code generation utils here for consistency
if ir.get("num_cells") is not None:
code["num_cells"] = " return %d;" % (ir["num_cells"],)
code["additional_includes_set"] = set()
code["additional_includes_set"].update(ir.get("additional_includes_set",()))
code["additional_includes_set"].update(uflacs_code["additional_includes_set"])
return code
def generate_tabulate_tensor_code(ir, prefix, parameters):
# Create FFC C++ backend
backend = FFCBackend(ir, parameters)
# Create code generator for integral body
ig = IntegralGenerator(ir, backend)
# Generate code ast for the tabulate_tensor body
parts = ig.generate()
# Format code AST as one string
body = format_indented_lines(parts.cs_format(), 1)
# Fetch includes
includes = set(ig.get_includes())
# Format uflacs specific code structures into a single
# string and place in dict before returning to ffc
code = {
"tabulate_tensor": body,
"additional_includes_set": includes,
}
return code
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