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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include <cassert>
#include <ostream>
#include "fwd.h"
namespace crimson::os::seastore::onode {
constexpr uint8_t FIELD_TYPE_MAGIC = 0x25;
enum class field_type_t : uint8_t {
N0 = FIELD_TYPE_MAGIC,
N1,
N2,
N3,
_MAX
};
inline uint8_t to_unsigned(field_type_t type) {
auto value = static_cast<uint8_t>(type);
assert(value >= FIELD_TYPE_MAGIC);
assert(value < static_cast<uint8_t>(field_type_t::_MAX));
return value - FIELD_TYPE_MAGIC;
}
inline std::ostream& operator<<(std::ostream &os, field_type_t type) {
const char* const names[] = {"0", "1", "2", "3"};
auto index = to_unsigned(type);
os << names[index];
return os;
}
enum class node_type_t : uint8_t {
LEAF = 0,
INTERNAL
};
inline std::ostream& operator<<(std::ostream &os, const node_type_t& type) {
const char* const names[] = {"L", "I"};
auto index = static_cast<uint8_t>(type);
assert(index <= 1u);
os << names[index];
return os;
}
struct laddr_packed_t {
laddr_t value;
} __attribute__((packed));
inline std::ostream& operator<<(std::ostream& os, const laddr_packed_t& laddr) {
return os << "laddr_packed(0x" << std::hex << laddr.value << std::dec << ")";
}
using match_stat_t = int8_t;
constexpr match_stat_t MSTAT_END = -2; // index is search_position_t::end()
constexpr match_stat_t MSTAT_EQ = -1; // key == index
constexpr match_stat_t MSTAT_LT0 = 0; // key == index [pool/shard crush ns/oid]; key < index [snap/gen]
constexpr match_stat_t MSTAT_LT1 = 1; // key == index [pool/shard crush]; key < index [ns/oid]
constexpr match_stat_t MSTAT_LT2 = 2; // key < index [pool/shard crush ns/oid] ||
// key == index [pool/shard]; key < index [crush]
constexpr match_stat_t MSTAT_LT3 = 3; // key < index [pool/shard]
constexpr match_stat_t MSTAT_MIN = MSTAT_END;
constexpr match_stat_t MSTAT_MAX = MSTAT_LT3;
}
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