src/cpp-common/uuid-view.hpp

   1 /*
   2  * Copyright (c) 2020 Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * SPDX-License-Identifier: MIT
   5  */
   6
   7 #ifndef BABELTRACE_CPP_COMMON_UUID_VIEW_HPP
   8 #define BABELTRACE_CPP_COMMON_UUID_VIEW_HPP
   9
  10 #include <array>
  11 #include <cstdint>
  12 #include <string>
  13
  14 #include "common/assert.h"
  15 #include "common/uuid.h"
  16
  17 namespace bt2_common {
  18
  19 class UuidView final
  20 {
  21 public:
  22     explicit UuidView(const std::uint8_t * const uuid) noexcept : _mUuid {uuid}
  23     {
  24         BT_ASSERT_DBG(uuid);
  25     }
  26
  27     UuidView(const UuidView&) noexcept = default;
  28     UuidView& operator=(const UuidView&) noexcept = default;
  29
  30     bool operator==(const UuidView& other) const noexcept
  31     {
  32         return bt_uuid_compare(_mUuid, other._mUuid) == 0;
  33     }
  34
  35     bool operator!=(const UuidView& other) const noexcept
  36     {
  37         return !(*this == other);
  38     }
  39
  40     bool operator<(const UuidView& other) const noexcept
  41     {
  42         return bt_uuid_compare(_mUuid, other._mUuid) < 0;
  43     }
  44
  45     std::string str() const
  46     {
  47         std::string s;
  48
  49         s.resize(BT_UUID_STR_LEN);
  50         bt_uuid_to_str(_mUuid, &s[0]);
  51
  52         return s;
  53     }
  54
  55     static constexpr std::size_t size() noexcept
  56     {
  57         return BT_UUID_LEN;
  58     }
  59
  60     const std::uint8_t *data() const noexcept
  61     {
  62         return _mUuid;
  63     }
  64
  65 private:
  66     const std::uint8_t *_mUuid;
  67 };
  68
  69 } /* namespace bt2_common */
  70
  71 #endif /* BABELTRACE_CPP_COMMON_UUID_VIEW_HPP */