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// Copyright (C) 2018 The Android Open Source Project
//
// 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.
#include "inode2filename/inode.h"
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <string>
#include <vector>
#include <sys/sysmacros.h>
#include <sys/types.h>
using android::base::ParseUint;
namespace iorap::inode2filename {
// TODO: refactor to return expected<Inode, string>
bool Inode::Parse(const std::string& str, Inode* out, std::string* error_msg) {
DCHECK(out != nullptr);
DCHECK(error_msg != nullptr);
// Major:minor:inode OR dev_t@inode
std::vector<std::string> lst_pair = android::base::Split(str, "@");
if (lst_pair.size() == 2) {
size_t dev_whole = 0;
if (!ParseUint(lst_pair[0], &dev_whole)) {
*error_msg = "Failed to parse the whole device id as uint.";
return false;
}
dev_t dev_w = static_cast<dev_t>(dev_whole);
out->device_major = major(dev_w);
out->device_minor = minor(dev_w);
if (!ParseUint(lst_pair[1], &out->inode)) {
*error_msg = "Failed to parse inode as uint.";
return false;
}
return true;
}
std::vector<std::string> lst = android::base::Split(str, ":");
if (lst.size() != 3) {
*error_msg = "Too few : separated items";
return false;
}
if (!ParseUint(lst[0], &out->device_major)) {
*error_msg = "Failed to parse 0th element as a uint";
return false;
}
if (!ParseUint(lst[1], &out->device_minor)) {
*error_msg = "Failed to parse 1st element as a uint";
return false;
}
if (!ParseUint(lst[2], &out->inode)) {
*error_msg = "Failed to parse 2nd element as a uint";
return false;
}
return true;
}
} // namespace iorap::inode2filename
// Ensure our pollution-free aliases match the typedefs in the system headers.
static_assert(std::is_same_v<iorap::inode2filename::dev_t, dev_t>);
static_assert(std::is_same_v<iorap::inode2filename::ino_t, ino_t>);
// TODO: consider some tests for major, minor, etc.
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