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Set the special "not found" evbuffer_ptr consistantly.

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The _internal.pos_in_chain field was uninitialized or set to different
values in different places returning the special "not found" pointer.

Signed-off-by: Nir Soffer <nirsof@gmail.com>
This commit is contained in:
Nir Soffer 2011-06-14 01:58:30 +03:00 committed by Nick Mathewson
parent 261ba63dba
commit e3e97ae31b
1 changed files with 12 additions and 10 deletions
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22
buffer.c
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@ -132,6 +132,13 @@
#define CHAIN_PINNED(ch) (((ch)->flags & EVBUFFER_MEM_PINNED_ANY) != 0)
#define CHAIN_PINNED_R(ch) (((ch)->flags & EVBUFFER_MEM_PINNED_R) != 0)
/* evbuffer_ptr support */
#define PTR_NOT_FOUND(ptr) do { \
(ptr)->pos = -1; \
(ptr)->_internal.chain = NULL; \
(ptr)->_internal.pos_in_chain = 0; \
} while (0)
static void evbuffer_chain_align(struct evbuffer_chain *chain);
static int evbuffer_chain_should_realign(struct evbuffer_chain *chain,
size_t datalen);
@ -1351,9 +1358,7 @@ evbuffer_search_eol(struct evbuffer *buffer,
/* Avoid locking in trivial edge cases */
if (start && start->_internal.chain == NULL) {
it.pos = -1;
it._internal.chain = NULL;
it._internal.pos_in_chain = 0;
PTR_NOT_FOUND(&it);
if (eol_len_out)
*eol_len_out = extra_drain;
return it;
@ -1419,9 +1424,8 @@ evbuffer_search_eol(struct evbuffer *buffer,
done:
EVBUFFER_UNLOCK(buffer);
if (!ok) {
it.pos = -1;
}
if (!ok)
PTR_NOT_FOUND(&it);
if (eol_len_out)
*eol_len_out = extra_drain;
@ -2352,8 +2356,7 @@ evbuffer_ptr_set(struct evbuffer *buf, struct evbuffer_ptr *pos,
pos->_internal.chain = NULL;
pos->_internal.pos_in_chain = 0;
} else {
pos->_internal.chain = NULL;
pos->pos = -1;
PTR_NOT_FOUND(pos);
result = -1;
}
@ -2464,8 +2467,7 @@ evbuffer_search_range(struct evbuffer *buffer, const char *what, size_t len, con
}
not_found:
pos.pos = -1;
pos._internal.chain = NULL;
PTR_NOT_FOUND(&pos);
done:
EVBUFFER_UNLOCK(buffer);
return pos;