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53 lines
2.0 KiB
53 lines
2.0 KiB
4 months ago
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//
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// Copyright (C) 2020 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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//
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#include <inttypes.h>
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#include <android-base/stringprintf.h>
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#include <kver/kernel_release.h>
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namespace android::kver {
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#define KERNEL_RELEASE_PRINT_FORMAT \
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"%" PRIu64 ".%" PRIu64 ".%" PRIu64 "-android%" PRIu64 "-%" PRIu64
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#define KERNEL_RELEASE_SCAN_FORMAT KERNEL_RELEASE_PRINT_FORMAT "%n"
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// Not taking a string_view because sscanf requires null-termination.
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std::optional<KernelRelease> KernelRelease::Parse(const std::string& s, bool allow_suffix) {
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if (s.size() > std::numeric_limits<int>::max()) return std::nullopt;
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int nchars = -1;
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KernelRelease ret;
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auto scan_res = sscanf(s.c_str(), KERNEL_RELEASE_SCAN_FORMAT, &ret.kmi_version_.version_,
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&ret.kmi_version_.patch_level_, &ret.sub_level_,
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&ret.kmi_version_.release_, &ret.kmi_version_.gen_, &nchars);
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if (scan_res != 5) return std::nullopt;
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if (nchars < 0) return std::nullopt;
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// If !allow_suffix, ensure the whole string is consumed.
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if (!allow_suffix && nchars != s.size()) return std::nullopt;
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return ret;
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}
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std::string KernelRelease::string() const {
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return android::base::StringPrintf(KERNEL_RELEASE_PRINT_FORMAT, version(), patch_level(),
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sub_level(), android_release(), generation());
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}
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std::tuple<uint64_t, uint64_t, uint64_t> KernelRelease::kernel_version_tuple() const {
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return std::make_tuple(version(), patch_level(), sub_level());
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}
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} // namespace android::kver
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