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author | Eric Blake <eblake@redhat.com> | 2016-02-17 23:48:15 -0700 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:45:29 -0600 |
commit | f5c39f9c4210f444621965df2fb1304a39cadf77 (patch) | |
tree | 63e67d68f1b919c1439c2ed11cfda939904ebb58 | |
parent | 011b118064e6d1f779c206f9f05349bd64c4aa5d (diff) | |
download | hqemu-f5c39f9c4210f444621965df2fb1304a39cadf77.zip hqemu-f5c39f9c4210f444621965df2fb1304a39cadf77.tar.gz |
qapi: Simplify excess input reporting in input visitors
When reporting that an unvisited member remains at the end of an
input visit for a struct, we were using g_hash_table_find()
coupled with a callback function that always returns true, to
locate an arbitrary member of the hash table. But if all we
need is an arbitrary entry, we can get that from a single-use
iterator, without needing a tautological callback function.
Technically, our cast of &(GQueue *) to (void **) is not strict
C (while void * must be able to hold all other pointers, nothing
says a void ** has to be the same width or representation as a
GQueue **). The kosher way to write it would be the verbose:
void *tmp;
GQueue *any;
if (g_hash_table_iter_next(&iter, NULL, &tmp)) {
any = tmp;
But our code base (not to mention glib itself) already has other
cases of assuming that ALL pointers have the same width and
representation, where a compiler would have to go out of its way
to mis-compile our borderline behavior.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1455778109-6278-2-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
-rw-r--r-- | qapi/opts-visitor.c | 12 | ||||
-rw-r--r-- | qapi/qmp-input-visitor.c | 14 |
2 files changed, 8 insertions, 18 deletions
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c index d54f75b..ae5b955 100644 --- a/qapi/opts-visitor.c +++ b/qapi/opts-visitor.c @@ -157,17 +157,11 @@ opts_start_struct(Visitor *v, const char *name, void **obj, } -static gboolean -ghr_true(gpointer ign_key, gpointer ign_value, gpointer ign_user_data) -{ - return TRUE; -} - - static void opts_end_struct(Visitor *v, Error **errp) { OptsVisitor *ov = to_ov(v); + GHashTableIter iter; GQueue *any; if (--ov->depth > 0) { @@ -175,8 +169,8 @@ opts_end_struct(Visitor *v, Error **errp) } /* we should have processed all (distinct) QemuOpt instances */ - any = g_hash_table_find(ov->unprocessed_opts, &ghr_true, NULL); - if (any) { + g_hash_table_iter_init(&iter, ov->unprocessed_opts); + if (g_hash_table_iter_next(&iter, NULL, (void **)&any)) { const QemuOpt *first; first = g_queue_peek_head(any); diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index 362a1a3..2f48b95 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -90,12 +90,6 @@ static void qmp_input_push(QmpInputVisitor *qiv, QObject *obj, Error **errp) qiv->nb_stack++; } -/** Only for qmp_input_pop. */ -static gboolean always_true(gpointer key, gpointer val, gpointer user_pkey) -{ - *(const char **)user_pkey = (const char *)key; - return TRUE; -} static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp) { @@ -104,9 +98,11 @@ static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp) if (qiv->strict) { GHashTable * const top_ht = qiv->stack[qiv->nb_stack - 1].h; if (top_ht) { - if (g_hash_table_size(top_ht)) { - const char *key; - g_hash_table_find(top_ht, always_true, &key); + GHashTableIter iter; + const char *key; + + g_hash_table_iter_init(&iter, top_ht); + if (g_hash_table_iter_next(&iter, (void **)&key, NULL)) { error_setg(errp, QERR_QMP_EXTRA_MEMBER, key); } g_hash_table_unref(top_ht); |