6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
//===-- UUID.h --------------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_UTILITY_UUID_H
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#define LLDB_UTILITY_UUID_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Endian.h"
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#include <cstddef>
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#include <cstdint>
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#include <string>
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namespace lldb_private {
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class Stream;
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class UUID {
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// Represents UUID's of various sizes. In all cases, a uuid of all zeros is
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// treated as an "Invalid UUID" marker, and the UUID created from such data
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// will return false for IsValid.
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public:
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UUID() = default;
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/// Creates a uuid from the data pointed to by the bytes argument.
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UUID(llvm::ArrayRef<uint8_t> bytes) : m_bytes(bytes) {
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if (llvm::all_of(m_bytes, [](uint8_t b) { return b == 0; })) {
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Clear();
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}
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}
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// Reference:
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// https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html
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struct CvRecordPdb70 {
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struct {
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llvm::support::ulittle32_t Data1;
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llvm::support::ulittle16_t Data2;
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llvm::support::ulittle16_t Data3;
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uint8_t Data4[8];
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} Uuid;
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llvm::support::ulittle32_t Age;
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// char PDBFileName[];
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};
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/// Create a UUID from CvRecordPdb70.
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UUID(CvRecordPdb70 debug_info);
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/// Creates a UUID from the data pointed to by the bytes argument.
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UUID(const void *bytes, uint32_t num_bytes) {
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if (!bytes)
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return;
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*this
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= UUID(llvm::ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(bytes),
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num_bytes));
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}
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void Clear() { m_bytes.clear(); }
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void Dump(Stream &s) const;
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llvm::ArrayRef<uint8_t> GetBytes() const { return m_bytes; }
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explicit operator bool() const { return IsValid(); }
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bool IsValid() const { return !m_bytes.empty(); }
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std::string GetAsString(llvm::StringRef separator = "-") const;
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bool SetFromStringRef(llvm::StringRef str);
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/// Decode as many UUID bytes as possible from the C string \a cstr.
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///
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/// \param[in] str
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/// An llvm::StringRef that points at a UUID string value (no leading
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/// spaces). The string must contain only hex characters and optionally
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/// can contain the '-' sepearators.
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///
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/// \param[in] uuid_bytes
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/// A buffer of bytes that will contain a full or partially decoded UUID.
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///
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/// \return
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/// The original string, with all decoded bytes removed.
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static llvm::StringRef
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DecodeUUIDBytesFromString(llvm::StringRef str,
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llvm::SmallVectorImpl<uint8_t> &uuid_bytes);
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private:
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// GNU ld generates 20-byte build-ids. Size chosen to avoid heap allocations
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// for this case.
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llvm::SmallVector<uint8_t, 20> m_bytes;
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friend bool operator==(const UUID &LHS, const UUID &RHS) {
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return LHS.m_bytes == RHS.m_bytes;
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}
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friend bool operator!=(const UUID &LHS, const UUID &RHS) {
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return !(LHS == RHS);
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}
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friend bool operator<(const UUID &LHS, const UUID &RHS) {
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return LHS.m_bytes < RHS.m_bytes;
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}
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friend bool operator<=(const UUID &LHS, const UUID &RHS) {
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return !(RHS < LHS);
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}
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friend bool operator>(const UUID &LHS, const UUID &RHS) { return RHS < LHS; }
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friend bool operator>=(const UUID &LHS, const UUID &RHS) {
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return !(LHS < RHS);
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}
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};
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} // namespace lldb_private
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#endif // LLDB_UTILITY_UUID_H
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