# Copyright (C) 2023 - 2026 ANSYS, Inc. and/or its affiliates.
# SPDX-License-Identifier: MIT
#
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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"""Function to write cards."""
import typing
from ansys.dyna.core.lib.card_interface import CardInterface
from ansys.dyna.core.lib.format_type import format_type
from ansys.dyna.core.lib.parameters import ParameterSet
[docs]
def write_cards(
cards: typing.List[CardInterface],
buf: typing.TextIO,
write_format: format_type,
comment: typing.Optional[bool] = True,
retain_parameters: bool = False,
parameter_set: typing.Optional[ParameterSet] = None,
keyword_id: typing.Optional[str] = None,
uri_prefix: typing.Optional[str] = None,
):
"""Write the cards.
Parameters
----------
cards : list of CardInterface
The cards to write.
buf : TextIO
Buffer to write to.
write_format : format_type
The format to use for writing.
comment : bool, optional
Whether to write field name comments. Default True.
retain_parameters : bool, optional
If True, write original parameter references instead of values.
If False and parameter_set is provided (keyword on deck), resolve refs to
current values at write time.
parameter_set : ParameterSet, optional
Set containing refs and values. When retain_parameters=True, used to look up
ref strings for write-back. When retain_parameters=False, used to resolve
refs to current values.
keyword_id : str, optional
The keyword's ID for building URI paths when parameter_set is provided.
"""
# this code tries its best to avoid adding superfluous trailing newlines, but
# is not always successful. If one or more empty cards exist at the end of the
# keyword, a single newline will be added before them. Streams are typically
# write-only, and it is hard to remove the trailing newline from the stream.
# HOWEVER - if no buffer is passed in, this scenario can be detected and the
# trailing newline can be removed from the return value. In addition, if the
# keywords are written as part of a deck, the deck can detect if any keyword
# added a trailing newline and seek back one character to continue writing
# more keywords.
pos = buf.tell() # record the position of the last newline
for card_index, card in enumerate(cards):
# Only write newline separator if the card is active and will produce output
if card.active and buf.tell() != pos:
# if we have written since the last newline, we need to prepend a new line
buf.write("\n")
pos = buf.tell()
# Build URI prefix for this card when parameter_set is provided
card_uri_prefix = None
if parameter_set is not None:
if uri_prefix is not None:
# Nested CardSet - extend parent's prefix
card_uri_prefix = f"{uri_prefix}/card{card_index}"
elif keyword_id is not None:
# Top-level keyword - start from keyword_id
card_uri_prefix = f"{keyword_id}/card{card_index}"
card.write(
write_format,
buf,
comment,
retain_parameters=retain_parameters,
parameter_set=parameter_set,
uri_prefix=card_uri_prefix,
)
superfluous_newline = pos == buf.tell()
if superfluous_newline:
buf.seek(buf.tell() - 1)
buf.truncate() # Required for StringIO - seek alone doesn't remove content
