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_helper.py
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# -*- mode:python; coding: utf-8 -*-
#
# Copyright (©) 2016-2023 EPFL (École Polytechnique Fédérale de Lausanne),
# Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
# Copyright (©) 2020-2023 Lucas Frérot
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
Helper functions for dumpers
"""
from os import PathLike
from functools import wraps
from pathlib import Path
import io
import typing as ts
import numpy as np
from .. import model_type, type_traits
from .._tamaas import mpi
__all__ = ["step_dump", "directory_dump", "local_slice"]
_basic_types = [t for t, trait in type_traits.items() if trait.components == 1]
FileType = ts.Union[str, PathLike, io.TextIOBase]
NameType = ts.Union[str, PathLike]
def _is_surface_field(field, model):
def _to_global(shape):
if len(shape) == len(model.boundary_shape) + 1:
return mpi.global_shape(model.boundary_shape) + [shape[-1]]
return mpi.global_shape(shape)
def _compare_shape(a, b):
return a == b
b_shapes = [list(model[name].shape) for name in model.boundary_fields]
shape = list(field.shape)
return any(_compare_shape(shape, s) for s in b_shapes) \
or any(_compare_shape(shape, _to_global(s)) for s in b_shapes)
def local_slice(field, model, surface_field=None):
n = model.shape
bn = model.boundary_shape
gshape = mpi.global_shape(bn)
offsets = np.zeros_like(gshape)
offsets[0] = mpi.local_offset(gshape)
if not surface_field:
surface_field = _is_surface_field(field, model)
if not surface_field and len(n) > len(bn):
gshape = [n[0]] + gshape
offsets = np.concatenate(([0], offsets))
shape = bn if surface_field else n
if len(field.shape) > len(shape):
shape += field.shape[len(shape):]
def sgen(offset, size):
return slice(offset, offset + size, None)
def sgen_basic(offset, size):
return slice(offset, offset + size)
slice_gen = sgen_basic if model_type in _basic_types else sgen
return tuple(map(slice_gen, offsets, shape))
def step_dump(cls):
"""
Decorator for dumper with counter for steps
"""
orig_init = cls.__init__
orig_dump = cls.dump
@wraps(cls.__init__)
def __init__(obj, *args, **kwargs):
orig_init(obj, *args, **kwargs)
obj.count = 0
def postfix(obj):
return "_{:04d}".format(obj.count)
@wraps(cls.dump)
def dump(obj, *args, **kwargs):
orig_dump(obj, *args, **kwargs)
obj.count += 1
cls.__init__ = __init__
cls.dump = dump
cls.postfix = property(postfix)
return cls
def directory_dump(directory=""):
"Decorator for dumper in a directory"
directory = Path(directory)
def actual_decorator(cls):
orig_dump = cls.dump
orig_filepath = cls.file_path.fget
orig_init = cls.__init__
@wraps(cls.__init__)
def init(obj, *args, **kwargs):
orig_init(obj, *args, **kwargs)
obj.mkdir = kwargs.get('mkdir', True)
@wraps(cls.dump)
def dump(obj, *args, **kwargs):
if mpi.rank() == 0 and getattr(obj, 'mkdir'):
directory.mkdir(parents=True, exist_ok=True)
orig_dump(obj, *args, **kwargs)
@wraps(cls.file_path.fget)
def file_path(obj):
if getattr(obj, 'mkdir'):
return str(directory / orig_filepath(obj))
return orig_filepath(obj)
cls.__init__ = init
cls.dump = dump
cls.file_path = property(file_path)
return cls
return actual_decorator
def hdf5toVTK(inpath: PathLike, outname: str):
"""Convert HDF5 dump of a model to VTK."""
from . import UVWDumper, H5Dumper # noqa
UVWDumper(outname, all_fields=True) << H5Dumper.read(inpath)
def netCDFtoParaview(inpath: PathLike, outname: str):
"""Convert NetCDF dump of model sequence to Paraview."""
from . import UVWGroupDumper, NetCDFDumper # noqa
dumper = UVWGroupDumper(outname, all_fields=True)
for model in NetCDFDumper.read_sequence(inpath):
dumper << model
def file_handler(mode: str):
"""Decorate a function to accept path-like or file handles."""
def _handler(func):
@wraps(func)
def _wrapped(self, fd: FileType, *args, **kwargs):
if isinstance(fd, (str, PathLike)):
with open(fd, mode) as fh:
return _wrapped(self, fh, *args, **kwargs)
elif isinstance(fd, io.TextIOBase):
return func(self, fd, *args, **kwargs)
raise TypeError(
f"Expected a path-like or file handle, got {type(fd)}")
return _wrapped
return _handler

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