Source code for ffcx.naming

# Copyright (C) 2009-2020 Anders Logg and Michal Habera
# This file is part of FFCx.(
# SPDX-License-Identifier:    LGPL-3.0-or-later

import hashlib
import typing

import numpy as np
import numpy.typing as npt

import ffcx
import ufl

from .element_interface import convert_element

[docs]def compute_signature(ufl_objects: typing.List[ typing.Union[ufl.Form, ufl.FiniteElementBase, typing.Tuple[ufl.core.expr.Expr, npt.NDArray[np.float64]]]], tag: str) -> str: """Compute the signature hash. Based on the UFL type of the objects and an additional optional 'tag'. """ object_signature = "" for ufl_object in ufl_objects: # Get signature from ufl object if isinstance(ufl_object, ufl.Form): kind = "form" object_signature += ufl_object.signature() elif isinstance(ufl_object, ufl.FiniteElementBase): object_signature += repr(convert_element(ufl_object)) kind = "element" elif isinstance(ufl_object, tuple) and isinstance(ufl_object[0], ufl.core.expr.Expr): expr = ufl_object[0] points = ufl_object[1] # FIXME Move this to UFL, cache the computation coeffs = ufl.algorithms.extract_coefficients(expr) consts = ufl.algorithms.analysis.extract_constants(expr) args = ufl.algorithms.analysis.extract_arguments(expr) rn = dict() rn.update(dict((c, i) for i, c in enumerate(coeffs))) rn.update(dict((c, i) for i, c in enumerate(consts))) rn.update(dict((c, i) for i, c in enumerate(args))) domains: typing.List[ufl.Mesh] = [] for coeff in coeffs: domains.append(*coeff.ufl_domains()) for arg in args: domains.append(*arg.ufl_function_space().ufl_domains()) for gc in ufl.algorithms.analysis.extract_type(expr, ufl.classes.GeometricQuantity): domains.append(*gc.ufl_domains()) for const in consts: domains.append(const.ufl_domain()) domains = ufl.algorithms.analysis.unique_tuple(domains) rn.update(dict((d, i) for i, d in enumerate(domains))) # Hash on UFL signature and points signature = ufl.algorithms.signature.compute_expression_signature(expr, rn) object_signature += signature object_signature += repr(points) kind = "expression" else: raise RuntimeError(f"Unknown ufl object type {ufl_object.__class__.__name__}") # Build combined signature signatures = [object_signature, str(ffcx.__version__), ffcx.codegeneration.get_signature(), kind, tag] string = ";".join(signatures) return hashlib.sha1(string.encode('utf-8')).hexdigest()
[docs]def integral_name(original_form, integral_type, form_id, subdomain_id, prefix): sig = compute_signature([original_form], str((prefix, integral_type, form_id, subdomain_id))) return f"integral_{sig}"
[docs]def form_name(original_form, form_id, prefix): sig = compute_signature([original_form], str((prefix, form_id))) return f"form_{sig}"
[docs]def finite_element_name(ufl_element, prefix): assert isinstance(ufl_element, ufl.FiniteElementBase) sig = compute_signature([convert_element(ufl_element)], prefix) return f"element_{sig}"
[docs]def dofmap_name(ufl_element, prefix): assert isinstance(ufl_element, ufl.FiniteElementBase) sig = compute_signature([convert_element(ufl_element)], prefix) return f"dofmap_{sig}"
[docs]def expression_name(expression, prefix): assert isinstance(expression[0], ufl.core.expr.Expr) sig = compute_signature([expression], prefix) return f"expression_{sig}"