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-rw-r--r--dbus/dbus-marshal-recursive.c205
-rw-r--r--dbus/dbus-marshal-recursive.h14
2 files changed, 145 insertions, 74 deletions
diff --git a/dbus/dbus-marshal-recursive.c b/dbus/dbus-marshal-recursive.c
index f9dab444..0037d63e 100644
--- a/dbus/dbus-marshal-recursive.c
+++ b/dbus/dbus-marshal-recursive.c
@@ -62,6 +62,7 @@ element_type_get_alignment (const DBusString *str,
static void
reader_init (DBusTypeReader *reader,
+ dbus_bool_t types_only,
int byte_order,
const DBusString *type_str,
int type_pos,
@@ -69,6 +70,8 @@ reader_init (DBusTypeReader *reader,
int value_pos)
{
reader->byte_order = byte_order;
+ reader->types_only = types_only != FALSE;
+ reader->finished = FALSE;
reader->type_str = type_str;
reader->type_pos = type_pos;
reader->value_str = value_str;
@@ -81,6 +84,7 @@ base_reader_recurse (DBusTypeReader *sub,
{
/* point subreader at the same place as parent */
reader_init (sub,
+ parent->types_only,
parent->byte_order,
parent->type_str,
parent->type_pos,
@@ -98,11 +102,12 @@ struct_reader_recurse (DBusTypeReader *sub,
sub->type_pos) == DBUS_STRUCT_BEGIN_CHAR);
sub->type_pos += 1;
+
+ if (sub->types_only)
+ return;
/* struct has 8 byte alignment */
sub->value_pos = _DBUS_ALIGN_VALUE (sub->value_pos, 8);
-
- sub->u.strct.finished = FALSE;
}
static void
@@ -119,6 +124,20 @@ array_reader_recurse (DBusTypeReader *sub,
/* point type_pos at the array element type */
sub->type_pos += 1;
+ sub->u.array.element_type = first_type_in_signature (sub->type_str,
+ sub->type_pos);
+
+ if (sub->types_only)
+ {
+ sub->u.array.start_pos = -1;
+ sub->u.array.len = _DBUS_INT_MAX;
+
+ _dbus_verbose (" type reader %p array element type = %s\n",
+ sub,
+ _dbus_type_to_string (sub->u.array.element_type));
+ return;
+ }
+
sub->value_pos = _DBUS_ALIGN_VALUE (sub->value_pos, 4);
_dbus_demarshal_basic_type (sub->value_str,
@@ -133,9 +152,7 @@ array_reader_recurse (DBusTypeReader *sub,
sub->type_pos);
sub->value_pos = _DBUS_ALIGN_VALUE (sub->value_pos, alignment);
-
- sub->u.array.element_type = first_type_in_signature (sub->type_str,
- sub->type_pos);
+
sub->u.array.start_pos = sub->value_pos;
_dbus_verbose (" type reader %p array start = %d array len = %d array element type = %s\n",
@@ -152,6 +169,8 @@ variant_reader_recurse (DBusTypeReader *sub,
int sig_len;
_dbus_assert (!_dbus_type_reader_array_is_empty (parent));
+ /* you can't go into a variant types-only since the type is in the value */
+ _dbus_assert (!parent->types_only);
base_reader_recurse (sub, parent);
@@ -190,7 +209,7 @@ struct_reader_get_current_type (DBusTypeReader *reader)
{
int t;
- if (reader->u.strct.finished)
+ if (reader->finished)
t = DBUS_TYPE_INVALID;
else
t = first_type_in_signature (reader->type_str,
@@ -203,21 +222,32 @@ static int
array_reader_get_current_type (DBusTypeReader *reader)
{
int t;
- int end_pos;
-
- /* return the array element type if elements remain, and
- * TYPE_INVALID otherwise
- */
-
- end_pos = reader->u.array.start_pos + reader->u.array.len;
-
- _dbus_assert (reader->value_pos <= end_pos);
- _dbus_assert (reader->value_pos >= reader->u.array.start_pos);
-
- if (reader->value_pos < end_pos)
- t = reader->u.array.element_type;
+
+ if (reader->types_only)
+ {
+ if (reader->finished)
+ t = DBUS_TYPE_INVALID;
+ else
+ t = reader->u.array.element_type;
+ }
else
- t = DBUS_TYPE_INVALID;
+ {
+ int end_pos;
+
+ /* return the array element type if elements remain, and
+ * TYPE_INVALID otherwise
+ */
+
+ end_pos = reader->u.array.start_pos + reader->u.array.len;
+
+ _dbus_assert (reader->value_pos <= end_pos);
+ _dbus_assert (reader->value_pos >= reader->u.array.start_pos);
+
+ if (reader->value_pos < end_pos)
+ t = reader->u.array.element_type;
+ else
+ t = DBUS_TYPE_INVALID;
+ }
return t;
}
@@ -302,23 +332,29 @@ base_reader_next (DBusTypeReader *reader,
/* Now we are at the end of this container */
reader->type_pos = sub.type_pos;
- reader->value_pos = sub.value_pos;
+
+ if (!reader->types_only)
+ reader->value_pos = sub.value_pos;
}
break;
case DBUS_TYPE_ARRAY:
- {
- skip_array_values (first_type_in_signature (reader->type_str,
- reader->type_pos + 1),
- reader->value_str, &reader->value_pos, reader->byte_order);
+ {
+ if (!reader->types_only)
+ skip_array_values (first_type_in_signature (reader->type_str,
+ reader->type_pos + 1),
+ reader->value_str, &reader->value_pos, reader->byte_order);
+
skip_one_complete_type (reader->type_str, &reader->type_pos);
}
break;
default:
- _dbus_marshal_skip_basic_type (reader->value_str,
- current_type, reader->byte_order,
- &reader->value_pos);
+ if (!reader->types_only)
+ _dbus_marshal_skip_basic_type (reader->value_str,
+ current_type, reader->byte_order,
+ &reader->value_pos);
+
reader->type_pos += 1;
break;
}
@@ -341,7 +377,7 @@ struct_reader_next (DBusTypeReader *reader,
if (t == DBUS_STRUCT_END_CHAR)
{
reader->type_pos += 1;
- reader->u.strct.finished = TRUE;
+ reader->finished = TRUE;
}
}
@@ -349,49 +385,63 @@ static void
array_reader_next (DBusTypeReader *reader,
int current_type)
{
- /* Skip one array element */
- int end_pos;
-
- end_pos = reader->u.array.start_pos + reader->u.array.len;
-
- _dbus_assert (reader->value_pos < end_pos);
- _dbus_assert (reader->value_pos >= reader->u.array.start_pos);
-
- if (reader->u.array.element_type == DBUS_TYPE_STRUCT)
+ if (reader->types_only)
{
- DBusTypeReader sub;
-
- /* Recurse into the struct */
- _dbus_type_reader_recurse (reader, &sub);
-
- /* Skip everything in this element */
- while (_dbus_type_reader_next (&sub))
- {
- /* nothing */;
- }
+ /* We have one "element" to be iterated over
+ * in each array, which is its element type.
+ * So the finished flag indicates whether we've
+ * iterated over it yet or not.
+ */
+ reader->finished = TRUE;
- /* Now we are at the end of this element */
- reader->value_pos = sub.value_pos;
- }
- else if (reader->u.array.element_type == DBUS_TYPE_ARRAY)
- {
- skip_array_values (first_type_in_signature (reader->type_str,
- reader->type_pos + 1),
- reader->value_str, &reader->value_pos, reader->byte_order);
+ return;
}
else
{
- _dbus_marshal_skip_basic_type (reader->value_str,
- current_type, reader->byte_order,
- &reader->value_pos);
- }
+ /* Skip one array element */
+ int end_pos;
+
+ end_pos = reader->u.array.start_pos + reader->u.array.len;
+
+ _dbus_assert (reader->value_pos < end_pos);
+ _dbus_assert (reader->value_pos >= reader->u.array.start_pos);
+
+ if (reader->u.array.element_type == DBUS_TYPE_STRUCT)
+ {
+ DBusTypeReader sub;
+
+ /* Recurse into the struct */
+ _dbus_type_reader_recurse (reader, &sub);
+
+ /* Skip everything in this element */
+ while (_dbus_type_reader_next (&sub))
+ {
+ /* nothing */;
+ }
+
+ /* Now we are at the end of this element */
+ reader->value_pos = sub.value_pos;
+ }
+ else if (reader->u.array.element_type == DBUS_TYPE_ARRAY)
+ {
+ skip_array_values (first_type_in_signature (reader->type_str,
+ reader->type_pos + 1),
+ reader->value_str, &reader->value_pos, reader->byte_order);
+ }
+ else
+ {
+ _dbus_marshal_skip_basic_type (reader->value_str,
+ current_type, reader->byte_order,
+ &reader->value_pos);
+ }
- _dbus_assert (reader->value_pos <= end_pos);
+ _dbus_assert (reader->value_pos <= end_pos);
- if (reader->value_pos == end_pos)
- {
- skip_one_complete_type (reader->type_str,
- &reader->type_pos);
+ if (reader->value_pos == end_pos)
+ {
+ skip_one_complete_type (reader->type_str,
+ &reader->type_pos);
+ }
}
}
@@ -433,7 +483,7 @@ _dbus_type_reader_init (DBusTypeReader *reader,
{
reader->klass = &body_reader_class;
- reader_init (reader, byte_order, type_str, type_pos,
+ reader_init (reader, FALSE, byte_order, type_str, type_pos,
value_str, value_pos);
_dbus_verbose (" type reader %p init type_pos = %d value_pos = %d remaining sig '%s'\n",
@@ -441,6 +491,21 @@ _dbus_type_reader_init (DBusTypeReader *reader,
_dbus_string_get_const_data_len (reader->type_str, reader->type_pos, 0));
}
+void
+_dbus_type_reader_init_types_only (DBusTypeReader *reader,
+ const DBusString *type_str,
+ int type_pos)
+{
+ reader->klass = &body_reader_class;
+
+ reader_init (reader, TRUE, DBUS_COMPILER_BYTE_ORDER /* irrelevant */,
+ type_str, type_pos, NULL, _DBUS_INT_MAX /* crashes if we screw up */);
+
+ _dbus_verbose (" type reader %p init types only type_pos = %d remaining sig '%s'\n",
+ reader, reader->type_pos,
+ _dbus_string_get_const_data_len (reader->type_str, reader->type_pos, 0));
+}
+
int
_dbus_type_reader_get_current_type (DBusTypeReader *reader)
{
@@ -466,8 +531,8 @@ _dbus_type_reader_array_is_empty (DBusTypeReader *reader)
dbus_uint32_t array_len;
int len_pos;
- _dbus_return_val_if_fail (_dbus_type_reader_get_current_type (reader) == DBUS_TYPE_ARRAY,
- TRUE);
+ _dbus_assert (_dbus_type_reader_get_current_type (reader) == DBUS_TYPE_ARRAY);
+ _dbus_assert (!reader->types_only);
len_pos = _DBUS_ALIGN_VALUE (reader->value_pos, 4);
@@ -486,6 +551,8 @@ _dbus_type_reader_read_basic (DBusTypeReader *reader,
{
int t;
int next;
+
+ _dbus_assert (!reader->types_only);
t = _dbus_type_reader_get_current_type (reader);
@@ -507,7 +574,7 @@ _dbus_type_reader_read_array_of_basic (DBusTypeReader *reader,
void **array,
int *array_len)
{
-
+ _dbus_assert (!reader->types_only);
}
diff --git a/dbus/dbus-marshal-recursive.h b/dbus/dbus-marshal-recursive.h
index 8e50fdc9..10108d1f 100644
--- a/dbus/dbus-marshal-recursive.h
+++ b/dbus/dbus-marshal-recursive.h
@@ -38,7 +38,12 @@ typedef struct DBusTypeReaderClass DBusTypeReaderClass;
struct DBusTypeReader
{
dbus_uint32_t byte_order : 8;
-
+
+ dbus_uint32_t types_only : 1; /* iterate over types not values */
+
+ dbus_uint32_t finished : 1; /* marks we're at end iterator for cases
+ * where we don't have another way to tell
+ */
const DBusString *type_str;
int type_pos;
const DBusString *value_str;
@@ -52,10 +57,6 @@ struct DBusTypeReader
dbus_uint32_t len;
int element_type;
} array;
-
- struct {
- dbus_uint32_t finished : 1;
- } strct;
} u;
};
@@ -87,6 +88,9 @@ void _dbus_type_reader_init (DBusTypeReader *reader,
int type_pos,
const DBusString *value_str,
int value_pos);
+void _dbus_type_reader_init_types_only (DBusTypeReader *reader,
+ const DBusString *type_str,
+ int type_pos);
int _dbus_type_reader_get_current_type (DBusTypeReader *reader);
dbus_bool_t _dbus_type_reader_array_is_empty (DBusTypeReader *reader);
void _dbus_type_reader_read_basic (DBusTypeReader *reader,
generated by cgit (git 2.34.1) at 2025-10-26 14:45:23 +0000