/*
- * Copyright (c) 2020 Philippe Proulx <pproulx@efficios.com>
+ * SPDX-FileCopyrightText: 2020 Philippe Proulx <pproulx@efficios.com>
*
* SPDX-License-Identifier: MIT
*/
#ifndef BABELTRACE_CPP_COMMON_UUID_VIEW_HPP
#define BABELTRACE_CPP_COMMON_UUID_VIEW_HPP
-#include <array>
+#include <algorithm>
#include <cstdint>
#include <string>
namespace bt2_common {
-class UuidView
+class Uuid;
+
+/*
+ * A view on existing UUID data.
+ *
+ * A `UuidView` object doesn't contain its UUID data: see `Uuid` for a
+ * UUID data container.
+ */
+class UuidView final
{
public:
- explicit UuidView(const std::uint8_t * const uuid) noexcept : _mUuid {uuid}
+ using Val = std::uint8_t;
+ using ConstIter = const Val *;
+
+public:
+ explicit UuidView(const Val * const uuid) noexcept : _mUuid {uuid}
{
BT_ASSERT_DBG(uuid);
}
+ explicit UuidView(const Uuid& uuid) noexcept;
UuidView(const UuidView&) noexcept = default;
UuidView& operator=(const UuidView&) noexcept = default;
+ UuidView& operator=(const Val * const uuid) noexcept
+ {
+ _mUuid = uuid;
+ return *this;
+ }
+
+ operator Uuid() const noexcept;
+
+ std::string str() const
+ {
+ std::string s;
+
+ s.resize(BT_UUID_STR_LEN);
+ bt_uuid_to_str(_mUuid, &s[0]);
+
+ return s;
+ }
+
bool operator==(const UuidView& other) const noexcept
{
return bt_uuid_compare(_mUuid, other._mUuid) == 0;
return bt_uuid_compare(_mUuid, other._mUuid) < 0;
}
- std::string string() const
+ static constexpr std::size_t size() noexcept
{
- std::string s;
-
- s.resize(BT_UUID_STR_LEN);
- bt_uuid_to_str(_mUuid, &s[0]);
+ return BT_UUID_LEN;
+ }
- return s;
+ const Val *data() const noexcept
+ {
+ return _mUuid;
}
- static constexpr std::size_t size() noexcept
+ Val operator[](const std::size_t index) const noexcept
{
- return BT_UUID_LEN;
+ return _mUuid[index];
}
- const std::uint8_t *data() const noexcept
+ ConstIter begin() const noexcept
{
return _mUuid;
}
+ ConstIter end() const noexcept
+ {
+ return _mUuid + this->size();
+ }
+
+ bool isNil() const noexcept
+ {
+ return std::all_of(this->begin(), this->end(), [](const std::uint8_t byte) {
+ return byte == 0;
+ });
+ }
+
private:
- const std::uint8_t *_mUuid;
+ const Val *_mUuid;
};
} /* namespace bt2_common */