Key.h

#ifndef ART_KEY_H
#define ART_KEY_H

#include <stdint.h>
#include <cstring>
#include <memory>
#include <assert.h>

typedef struct Key {
    uint64_t value;
    size_t key_len;
    uint8_t fkey[];

    inline Key *make_leaf(char *key, size_t key_len, uint64_t value);

    inline Key *make_leaf(uint64_t key, size_t key_len, uint64_t value);

    inline size_t getKeyLen() const;
} Key;

inline Key *Key::make_leaf(char *key, size_t key_len, uint64_t value)
{
    void *aligned_alloc;
    posix_memalign(&aligned_alloc, 64, sizeof(Key) + key_len);
    Key *k = reinterpret_cast<Key *> (aligned_alloc);

    k->value = value;
    k->key_len = key_len;
    memcpy(k->fkey, key, key_len);

    return k;
}

inline Key *Key::make_leaf(uint64_t key, size_t key_len, uint64_t value)
{
    void *aligned_alloc;
    posix_memalign(&aligned_alloc, 64, sizeof(Key) + key_len);
    Key *k = reinterpret_cast<Key *> (aligned_alloc);

    k->value = value;
    k->key_len = key_len;
    reinterpret_cast<uint64_t *> (&k->fkey[0])[0] = __builtin_bswap64(key);

    return k;
}

inline size_t Key::getKeyLen() const { return key_len; }

#endif // ART_KEY_H