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vere: ports u3_disk_read_list()

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This commit is contained in:
Joe Bryan 2022-12-14 01:48:20 -05:00
parent 9daab2fd5a
commit a5362f2af0
2 changed files with 51 additions and 0 deletions
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5
pkg/urbit/include/vere/vere.h
View File

@ -1015,6 +1015,11 @@
void
u3_disk_plan(u3_disk* log_u, u3_fact* tac_u);
/* u3_disk_read_list(): synchronously read a cons list of events.
*/
u3_weak
u3_disk_read_list(u3_disk* log_u, c3_d eve_d, c3_d len_d, c3_l* mug_l);
/* u3_disk_walk_init(): init iterator.
*/
u3_disk_walk*

46
pkg/urbit/vere/disk.c
View File

@ -500,6 +500,52 @@ u3_disk_read(u3_disk* log_u, c3_d eve_d, c3_d len_d)
uv_timer_start(&red_u->tim_u, _disk_read_start_cb, 0, 0);
}
struct _cd_list {
u3_disk* log_u;
u3_noun eve;
c3_l mug_l;
};
/* _disk_read_list_cb(): lmdb read callback, invoked for each event in order
*/
static c3_o
_disk_read_list_cb(void* ptr_v, c3_d eve_d, size_t val_i, void* val_p)
{
struct _cd_list* ven_u = ptr_v;
u3_disk* log_u = ven_u->log_u;
{
u3_noun job;
c3_l mug_l;
if ( c3n == u3_disk_sift(log_u, val_i, (c3_y*)val_p, &mug_l, &job) ) {
return c3n;
}
ven_u->mug_l = mug_l;
ven_u->eve = u3nc(job, ven_u->eve);
}
return c3y;
}
/* u3_disk_read_list(): synchronously read a cons list of events.
*/
u3_weak
u3_disk_read_list(u3_disk* log_u, c3_d eve_d, c3_d len_d, c3_l* mug_l)
{
struct _cd_list ven_u = { log_u, u3_nul, 0 };
if ( c3n == u3_lmdb_read(log_u->mdb_u, &ven_u,
eve_d, len_d, _disk_read_list_cb) )
{
return u3_none;
}
*mug_l = ven_u.mug_l;
return u3kb_flop(ven_u.eve);
}
/* u3_disk_walk_init(): init iterator.
*/
u3_disk_walk*