86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
// Copyright (C) 2019 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#ifndef TP_OVERRIDE_EMITTER_H
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#define TP_OVERRIDE_EMITTER_H
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#include "emitter.h"
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#include "metadata.h"
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#include <boost/optional.hpp>
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#include <sstream>
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//----------------------------------------------------------------
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namespace thin_provisioning {
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struct override_error : public std::runtime_error {
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override_error(std::string const &str)
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: std::runtime_error(str) {
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}
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};
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struct override_options {
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uint64_t get_transaction_id() const {
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if (!transaction_id_)
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bad_override_("transaction id");
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return *transaction_id_;
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}
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uint64_t get_transaction_id(uint64_t dflt) const {
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return transaction_id_ ? *transaction_id_ : dflt;
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}
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uint32_t get_data_block_size() const {
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if (!data_block_size_)
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bad_override_("data block size");
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return *data_block_size_;
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}
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uint32_t get_data_block_size(uint32_t dflt) const {
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return data_block_size_ ? *data_block_size_ : dflt;
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}
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uint64_t get_nr_data_blocks() const {
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if (!nr_data_blocks_)
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bad_override_("nr data blocks");
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return *nr_data_blocks_;
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}
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uint64_t get_nr_data_blocks(uint64_t dflt) const {
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return nr_data_blocks_ ? *nr_data_blocks_ : dflt;
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}
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boost::optional<uint64_t> transaction_id_;
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boost::optional<uint32_t> data_block_size_;
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boost::optional<uint64_t> nr_data_blocks_;
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private:
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void bad_override_(std::string const &field) const {
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throw override_error(field);
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}
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};
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emitter::ptr create_override_emitter(emitter::ptr inner, override_options const &opts);
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}
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//----------------------------------------------------------------
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#endif
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