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nostrdb: introduce ndb_id_u64_ts

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This will be the key used by our note_profile_kind indee

Signed-off-by: William Casarin <jb55@jb55.com>
This commit is contained in:
William Casarin
2024-12-13 17:21:58 -08:00
committed by Daniel D’Aquino
parent be1d149f4b
commit 155ac27bb5
1 changed files with 44 additions and 0 deletions
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44
nostrdb/src/nostrdb.c
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@@ -229,6 +229,13 @@ enum ndb_query_plan {
NDB_PLAN_TAGS, NDB_PLAN_TAGS,
}; };
// A id + u64 + timestamp
struct ndb_id_u64_ts {
unsigned char id[32]; // pubkey, id, etc
uint64_t u64; // kind, etc
uint64_t timestamp;
};
// A clustered key with an id and a timestamp // A clustered key with an id and a timestamp
struct ndb_tsid { struct ndb_tsid {
unsigned char id[32]; unsigned char id[32];
@@ -1402,6 +1409,14 @@ static int ndb_begin_rw_query(struct ndb *ndb, struct ndb_txn *txn)
return _ndb_begin_query(ndb, txn, 0); return _ndb_begin_query(ndb, txn, 0);
} }
static inline void ndb_id_u64_ts_init(struct ndb_id_u64_ts *key,
unsigned char *id, uint64_t iu64,
uint64_t timestamp)
{
memcpy(key->id, id, 32);
key->u64 = iu64;
key->timestamp = timestamp;
}
// Migrations // Migrations
// //
@@ -1516,6 +1531,35 @@ int ndb_db_version(struct ndb *ndb)
return version; return version;
} }
// custom pubkey+kind+timestamp comparison function. This is used by lmdb to
// perform b+ tree searches over the pubkey+kind+timestamp index
static int ndb_id_u64_ts_compare(const MDB_val *a, const MDB_val *b)
{
struct ndb_id_u64_ts *tsa, *tsb;
MDB_val a2 = *a, b2 = *b;
a2.mv_size = sizeof(tsa->id);
b2.mv_size = sizeof(tsb->id);
int cmp = mdb_cmp_memn(&a2, &b2);
if (cmp) return cmp;
tsa = a->mv_data;
tsb = b->mv_data;
if (tsa->u64 < tsb->u64)
return -1;
else if (tsa->u64 > tsb->u64)
return 1;
if (tsa->timestamp < tsb->timestamp)
return -1;
else if (tsa->timestamp > tsb->timestamp)
return 1;
return 0;
}
// custom kind+timestamp comparison function. This is used by lmdb to perform // custom kind+timestamp comparison function. This is used by lmdb to perform
// b+ tree searches over the kind+timestamp index // b+ tree searches over the kind+timestamp index
static int ndb_u64_ts_compare(const MDB_val *a, const MDB_val *b) static int ndb_u64_ts_compare(const MDB_val *a, const MDB_val *b)