# Copyright (c) 2025, NVIDIA CORPORATION.  All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import warnings


def get_pad_id(tokenizer) -> int:
    pad_id = tokenizer.pad
    if pad_id is not None:
        return pad_id
    pad_id = tokenizer.unk_id
    if pad_id is not None:
        return pad_id
    warnings.warn(
        "The text tokenizer has no <pad> or <unk> tokens available, using ID 0 for padding (this may lead to silent bugs)."
    )
    return 0