// Copyright (C) 2018 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef IORAP_SRC_INODE2FILENAME_INODE_H_
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#define IORAP_SRC_INODE2FILENAME_INODE_H_
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#include <functional>
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#include <ostream>
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#include <string>
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#include <stddef.h>
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namespace iorap::inode2filename {
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struct Inode {
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size_t device_major; // dev_t = makedev(major, minor)
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size_t device_minor;
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size_t inode; // ino_t = inode
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static bool Parse(const std::string& str, /*out*/Inode* out, /*out*/std::string* error_msg);
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bool operator==(const Inode& rhs) const {
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return device_major == rhs.device_major &&
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device_minor == rhs.device_minor &&
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inode == rhs.inode;
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}
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bool operator!=(const Inode& rhs) const {
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return !(*this == rhs);
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}
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};
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inline std::ostream& operator<<(std::ostream& os, const Inode& inode) {
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os << inode.device_major << ":" << inode.device_minor << ":" << inode.inode;
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return os;
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}
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} // namespace iorap::inode2filename
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namespace std {
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template <>
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struct hash<iorap::inode2filename::Inode> {
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using argument_type = iorap::inode2filename::Inode;
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using result_type = size_t;
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result_type operator()(argument_type const& s) const noexcept {
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// Hash the inode by using only the inode#. Ignore devices, we are extremely unlikely
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// to ever collide on the devices.
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result_type const h1 = std::hash<size_t>{}(s.inode);
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return h1;
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}
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};
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} // namespace std
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#endif // IORAP_SRC_INODE2FILENAME_INODE_H_
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