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Make xundump capable of extending tables

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Use ef_ensure_space() in getobj().  This also makes sure objects are
properly initialized before undumping writes to them.

Clean up how sentinels are appended: instead of keeping its slot
reserved while undumping, keep it in the table, and strip it off when
done.
This commit is contained in:
Markus Armbruster 2008-02-21 21:17:32 +01:00
parent 2eb8672b5e
commit c36cae7a64
1 changed files with 19 additions and 16 deletions
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35
src/lib/common/xundump.c
View file

@ -479,17 +479,16 @@ getobj(void)
int need_sentinel = !EF_IS_GAME_STATE(cur_type);
if (!cur_obj) {
cur_obj_is_blank = cur_id >= ep->fids;
cur_obj_is_blank = cur_id >= ep->fids - !!need_sentinel;
if (cur_obj_is_blank) {
/* TODO grow cache (and possibly file) unless EFF_STATIC */
if (cur_id < ep->csize - !!need_sentinel)
ep->cids = ep->fids = cur_id + 1;
/* else: ef_ptr() will fail */
}
cur_obj = ef_ptr(cur_type, cur_id);
if (!cur_obj)
gripe("Can't put ID %d into table %s, it holds only 0..%d.",
cur_id, ep->name, ep->fids - 1);
if (ef_ensure_space(cur_type, cur_id + !!need_sentinel, 1))
cur_obj = ef_ptr(cur_type, cur_id);
/* FIXME diagnose out of dynamic memory vs. static table full */
if (!cur_obj)
gripe("Can't put ID %d into table %s, it holds only 0..%d.",
cur_id, ep->name, ep->fids - !!need_sentinel - 1);
} else
cur_obj = ef_ptr(cur_type, cur_id);
}
return cur_obj;
@ -958,8 +957,12 @@ xubody(FILE *fp)
{
struct empfile *ep = &empfile[cur_type];
int need_sentinel = !EF_IS_GAME_STATE(cur_type);
int old_maxid = ep->fids;
int i, maxid, ch;
if (old_maxid == 0 && need_sentinel)
ef_ensure_space(cur_type, 0, 1);
maxid = 0;
for (i = 0;; ++i) {
while ((ch = skipfs(fp)) == '\n')
@ -974,6 +977,12 @@ xubody(FILE *fp)
maxid = MAX(maxid, cur_id + 1);
}
if (maxid >= old_maxid && need_sentinel) {
/* appended a sentinel, strip it off */
ep->fids--;
ep->cids--;
}
if (CANT_HAPPEN(maxid > ep->fids))
maxid = ep->fids;
if (maxid < ep->fids) {
@ -988,11 +997,5 @@ xubody(FILE *fp)
ef_nameof(cur_type), ep->fids, maxid);
}
if (need_sentinel) {
if (CANT_HAPPEN(maxid >= ep->csize))
return gripe("No space for sentinel");
memset(ep->cache + ep->size * maxid, 0, ep->size);
}
return i;
}