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Avoid setting unused variables (-Wself-assign)

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Setting a variable and then assigning it to itself avoids
-Wunused-but-set-variable but this specific trick is now caught by
-Wself-assign. Instead, actually use the value or don't bother
assigning it at all:

gdbusauth.c: call g_data_input_stream_read_byte() in void context
gdbusauthmechanismsha1.c: value is actually used
gdbusmessage.c: use consistent preprocessor-token protection
gthreadedresolver.c: skip over bytes in data blob
httpd.c: do something useful with the value

https://bugzilla.gnome.org/show_bug.cgi?id=745723
This commit is contained in:
Daniel Macks 2015-03-19 23:06:28 -04:00 committed by Philip Withnall
parent 5d9ccf162e
commit 190f64a0fb
5 changed files with 23 additions and 20 deletions
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9
gio/gdbusauth.c
View File

@ -961,7 +961,6 @@ _g_dbus_auth_run_server (GDBusAuth *auth,
GDataInputStream *dis;
GDataOutputStream *dos;
GError *local_error;
guchar byte;
gchar *line;
gsize line_length;
GDBusAuthMechanism *mech;
@ -997,7 +996,7 @@ _g_dbus_auth_run_server (GDBusAuth *auth,
g_data_input_stream_set_newline_type (dis, G_DATA_STREAM_NEWLINE_TYPE_CR_LF);
/* first read the NUL-byte (TODO: read credentials if using a unix domain socket) */
/* first read the NUL-byte */
#ifdef G_OS_UNIX
if (G_IS_UNIX_CONNECTION (auth->priv->stream))
{
@ -1014,8 +1013,7 @@ _g_dbus_auth_run_server (GDBusAuth *auth,
else
{
local_error = NULL;
byte = g_data_input_stream_read_byte (dis, cancellable, &local_error);
byte = byte; /* To avoid -Wunused-but-set-variable */
(void)g_data_input_stream_read_byte (dis, cancellable, &local_error);
if (local_error != NULL)
{
g_propagate_error (error, local_error);
@ -1024,8 +1022,7 @@ _g_dbus_auth_run_server (GDBusAuth *auth,
}
#else
local_error = NULL;
byte = g_data_input_stream_read_byte (dis, cancellable, &local_error);
byte = byte; /* To avoid -Wunused-but-set-variable */
(void)g_data_input_stream_read_byte (dis, cancellable, &local_error);
if (local_error != NULL)
{
g_propagate_error (error, local_error);

1
gio/gdbusauthmechanismsha1.c
View File

@ -753,7 +753,6 @@ keyring_generate_entry (const gchar *cookie_context,
g_strfreev (tokens);
goto out;
}
line_when = line_when; /* To avoid -Wunused-but-set-variable */
/* D-Bus spec says:

14
gio/gdbusmessage.c
View File

@ -1440,7 +1440,9 @@ parse_value_from_blob (GMemoryBuffer *buf,
{
GVariant *ret;
GError *local_error;
#ifdef DEBUG_SERIALIZER
gboolean is_leaf;
#endif /* DEBUG_SERIALIZER */
const gchar *type_string;
type_string = g_variant_type_peek_string (type);
@ -1460,7 +1462,9 @@ parse_value_from_blob (GMemoryBuffer *buf,
ret = NULL;
#ifdef DEBUG_SERIALIZER
is_leaf = TRUE;
#endif /* DEBUG_SERIALIZER */
local_error = NULL;
switch (type_string[0])
{
@ -1643,8 +1647,8 @@ parse_value_from_blob (GMemoryBuffer *buf,
array_len = g_memory_buffer_read_uint32 (buf);
is_leaf = FALSE;
#ifdef DEBUG_SERIALIZER
is_leaf = FALSE;
g_print (": array spans 0x%04x bytes\n", array_len);
#endif /* DEBUG_SERIALIZER */
@ -1751,8 +1755,8 @@ parse_value_from_blob (GMemoryBuffer *buf,
ensure_input_padding (buf, 8);
is_leaf = FALSE;
#ifdef DEBUG_SERIALIZER
is_leaf = FALSE;
g_print ("\n");
#endif /* DEBUG_SERIALIZER */
@ -1786,8 +1790,8 @@ parse_value_from_blob (GMemoryBuffer *buf,
{
ensure_input_padding (buf, 8);
is_leaf = FALSE;
#ifdef DEBUG_SERIALIZER
is_leaf = FALSE;
g_print ("\n");
#endif /* DEBUG_SERIALIZER */
@ -1821,8 +1825,8 @@ parse_value_from_blob (GMemoryBuffer *buf,
}
else if (g_variant_type_is_variant (type))
{
is_leaf = FALSE;
#ifdef DEBUG_SERIALIZER
is_leaf = FALSE;
g_print ("\n");
#endif /* DEBUG_SERIALIZER */
@ -1894,8 +1898,6 @@ parse_value_from_blob (GMemoryBuffer *buf,
g_free (s);
}
}
#else
is_leaf = is_leaf; /* To avoid -Wunused-but-set-variable */
#endif /* DEBUG_SERIALIZER */
/* sink the reference, if floating */

4
gio/gthreadedresolver.c
View File

@ -537,7 +537,6 @@ g_resolver_records_from_res_query (const gchar *rrname,
gchar namebuf[1024];
guchar *end, *p;
guint16 type, qclass, rdlength;
guint32 ttl;
HEADER *header;
GList *records;
GVariant *record;
@ -587,8 +586,7 @@ g_resolver_records_from_res_query (const gchar *rrname,
p += dn_expand (answer, end, p, namebuf, sizeof (namebuf));
GETSHORT (type, p);
GETSHORT (qclass, p);
GETLONG (ttl, p);
ttl = ttl; /* To avoid -Wunused-but-set-variable */
p += 4; /* ignore the ttl (type=long) value */
GETSHORT (rdlength, p);
if (type != rrtype || qclass != C_IN)

15
gio/tests/httpd.c
View File

@ -67,12 +67,19 @@ handler (GThreadedSocketService *service,
version = NULL;
tmp = strchr (escaped, ' ');
if (tmp != NULL)
if (tmp == NULL)
{
*tmp = 0;
version = tmp + 1;
send_error (out, 400, "Bad Request");
goto out;
}
*tmp = 0;
version = tmp + 1;
if (!g_str_has_prefix (version, "HTTP/1."))
{
send_error(out, 505, "HTTP Version Not Supported");
goto out;
}
version = version; /* To avoid -Wunused-but-set-variable */
query = strchr (escaped, '?');
if (query != NULL)