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//===-- UUID.h --------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_UTILITY_UUID_H
#define LLDB_UTILITY_UUID_H
// C Includes
// C++ Includes
#include <stddef.h>
#include <stdint.h>
#include <string>
#include "llvm/ADT/ArrayRef.h"
namespace llvm {
class StringRef;
}
namespace lldb_private {
class Stream;
class UUID {
public:
UUID() = default;
/// Creates a UUID from the data pointed to by the bytes argument. No special
/// significance is attached to any of the values.
static UUID fromData(const void *bytes, uint32_t num_bytes) {
if (bytes)
return fromData({reinterpret_cast<const uint8_t *>(bytes), num_bytes});
return UUID();
}
/// Creates a uuid from the data pointed to by the bytes argument. No special
/// significance is attached to any of the values.
static UUID fromData(llvm::ArrayRef<uint8_t> bytes) { return UUID(bytes); }
/// Creates a UUID from the data pointed to by the bytes argument. Data
/// consisting purely of zero bytes is treated as an invalid UUID.
static UUID fromOptionalData(const void *bytes, uint32_t num_bytes) {
if (bytes)
return fromOptionalData(
{reinterpret_cast<const uint8_t *>(bytes), num_bytes});
return UUID();
}
/// Creates a UUID from the data pointed to by the bytes argument. Data
/// consisting purely of zero bytes is treated as an invalid UUID.
static UUID fromOptionalData(llvm::ArrayRef<uint8_t> bytes) {
if (llvm::all_of(bytes, [](uint8_t b) { return b == 0; }))
return UUID();
return UUID(bytes);
}
void Clear() { m_bytes.clear(); }
void Dump(Stream *s) const;
llvm::ArrayRef<uint8_t> GetBytes() const { return m_bytes; }
explicit operator bool() const { return IsValid(); }
bool IsValid() const { return !m_bytes.empty(); }
std::string GetAsString(llvm::StringRef separator = "-") const;
size_t SetFromStringRef(llvm::StringRef str, uint32_t num_uuid_bytes = 16);
// Decode as many UUID bytes (up to 16) as possible from the C string "cstr"
// This is used for auto completion where a partial UUID might have been
// typed in. It
//------------------------------------------------------------------
/// Decode as many UUID bytes (up to 16) as possible from the C
/// string \a cstr.
///
/// @param[in] cstr
/// A NULL terminate C string that points at a UUID string value
/// (no leading spaces). The string must contain only hex
/// characters and optionally can contain the '-' sepearators.
///
/// @param[in] uuid_bytes
/// A buffer of bytes that will contain a full or patially
/// decoded UUID.
///
/// @return
/// The original string, with all decoded bytes removed.
//------------------------------------------------------------------
static llvm::StringRef
DecodeUUIDBytesFromString(llvm::StringRef str,
llvm::SmallVectorImpl<uint8_t> &uuid_bytes,
uint32_t num_uuid_bytes = 16);
private:
UUID(llvm::ArrayRef<uint8_t> bytes) : m_bytes(bytes.begin(), bytes.end()) {}
// GNU ld generates 20-byte build-ids. Size chosen to avoid heap allocations
// for this case.
llvm::SmallVector<uint8_t, 20> m_bytes;
friend bool operator==(const UUID &LHS, const UUID &RHS) {
return LHS.m_bytes == RHS.m_bytes;
}
friend bool operator!=(const UUID &LHS, const UUID &RHS) {
return !(LHS == RHS);
}
friend bool operator<(const UUID &LHS, const UUID &RHS) {
return LHS.m_bytes < RHS.m_bytes;
}
friend bool operator<=(const UUID &LHS, const UUID &RHS) {
return !(RHS < LHS);
}
friend bool operator>(const UUID &LHS, const UUID &RHS) { return RHS < LHS; }
friend bool operator>=(const UUID &LHS, const UUID &RHS) {
return !(LHS < RHS);
}
};
} // namespace lldb_private
#endif // LLDB_UTILITY_UUID_H