qapi: Support downstream events and commands

Enhance the testsuite to cover downstream events and commands.
Events worked without more tweaks, but commands needed a few final
updates in the generator to mangle names in the appropriate places.
In making those tweaks, it was easier to drop type_visitor() and
inline its actions instead.

Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

scripts/qapi-commands.py

@@ -20,12 +20,6 @@ import os
 import getopt
 import errno
 
-def type_visitor(name):
-    if type(name) == list:
-        return 'visit_type_%sList' % name[0]
-    else:
-        return 'visit_type_%s' % name
-
 def generate_command_decl(name, args, ret_type):
     arglist=""
     for argname, argtype, optional in parse_args(args):
@@ -153,10 +147,10 @@ if (has_%(c_name)s) {
                          c_name=c_name(argname))
             push_indent()
         ret += mcgen('''
-%(visitor)s(v, &%(c_name)s, "%(name)s", %(errp)s);
+visit_type_%(visitor)s(v, &%(c_name)s, "%(name)s", %(errp)s);
 ''',
                      c_name=c_name(argname), name=argname, argtype=argtype,
-                     visitor=type_visitor(argtype), errp=errparg)
+                     visitor=type_name(argtype), errp=errparg)
         ret += gen_err_check(errarg)
         if optional:
             pop_indent()
@@ -184,7 +178,7 @@ static void qmp_marshal_output_%(c_name)s(%(c_ret_type)s ret_in, QObject **ret_o
     Visitor *v;
 
     v = qmp_output_get_visitor(mo);
-    %(visitor)s(v, &ret_in, "unused", &local_err);
+    visit_type_%(visitor)s(v, &ret_in, "unused", &local_err);
     if (local_err) {
         goto out;
     }
@@ -195,12 +189,12 @@ out:
     qmp_output_visitor_cleanup(mo);
     md = qapi_dealloc_visitor_new();
     v = qapi_dealloc_get_visitor(md);
-    %(visitor)s(v, &ret_in, "unused", NULL);
+    visit_type_%(visitor)s(v, &ret_in, "unused", NULL);
     qapi_dealloc_visitor_cleanup(md);
 }
 ''',
                 c_ret_type=c_type(ret_type), c_name=c_name(name),
-                visitor=type_visitor(ret_type))
+                visitor=type_name(ret_type))
 
     return ret
 

tests/qapi-schema/qapi-schema-test.json

@@ -122,3 +122,8 @@
   'data': { '__org.qemu_x-value': '__org.qemu_x-Struct2' } }
 { 'alternate': '__org.qemu_x-Alt',
   'data': { '__org.qemu_x-branch': 'str', 'b': '__org.qemu_x-Base' } }
+{ 'event': '__ORG.QEMU_X-EVENT', 'data': '__org.qemu_x-Struct' }
+{ 'command': '__org.qemu_x-command',
+  'data': { 'a': ['__org.qemu_x-Enum'], 'b': ['__org.qemu_x-Struct'],
+            'c': '__org.qemu_x-Union2', 'd': '__org.qemu_x-Alt' },
+  'returns': '__org.qemu_x-Union1' }

tests/qapi-schema/qapi-schema-test.out

@@ -29,7 +29,9 @@
  OrderedDict([('union', '__org.qemu_x-Union1'), ('data', OrderedDict([('__org.qemu_x-branch', 'str')]))]),
  OrderedDict([('struct', '__org.qemu_x-Struct2'), ('data', OrderedDict([('array', ['__org.qemu_x-Union1'])]))]),
  OrderedDict([('union', '__org.qemu_x-Union2'), ('base', '__org.qemu_x-Base'), ('discriminator', '__org.qemu_x-member1'), ('data', OrderedDict([('__org.qemu_x-value', '__org.qemu_x-Struct2')]))]),
- OrderedDict([('alternate', '__org.qemu_x-Alt'), ('data', OrderedDict([('__org.qemu_x-branch', 'str'), ('b', '__org.qemu_x-Base')]))])]
+ OrderedDict([('alternate', '__org.qemu_x-Alt'), ('data', OrderedDict([('__org.qemu_x-branch', 'str'), ('b', '__org.qemu_x-Base')]))]),
+ OrderedDict([('event', '__ORG.QEMU_X-EVENT'), ('data', '__org.qemu_x-Struct')]),
+ OrderedDict([('command', '__org.qemu_x-command'), ('data', OrderedDict([('a', ['__org.qemu_x-Enum']), ('b', ['__org.qemu_x-Struct']), ('c', '__org.qemu_x-Union2'), ('d', '__org.qemu_x-Alt')])), ('returns', '__org.qemu_x-Union1')])]
 [{'enum_name': 'EnumOne', 'enum_values': ['value1', 'value2', 'value3']},
  {'enum_name': '__org.qemu_x-Enum', 'enum_values': ['__org.qemu_x-value']},
  {'enum_name': 'UserDefAlternateKind', 'enum_values': None},

tests/test-qmp-commands.c

@@ -51,6 +51,21 @@ int64_t qmp_user_def_cmd3(int64_t a, bool has_b, int64_t b, Error **errp)
     return a + (has_b ? b : 0);
 }
 
+__org_qemu_x_Union1 *qmp___org_qemu_x_command(__org_qemu_x_EnumList *a,
+                                              __org_qemu_x_StructList *b,
+                                              __org_qemu_x_Union2 *c,
+                                              __org_qemu_x_Alt *d,
+                                              Error **errp)
+{
+    __org_qemu_x_Union1 *ret = g_new0(__org_qemu_x_Union1, 1);
+
+    ret->kind = ORG_QEMU_X_UNION1_KIND___ORG_QEMU_X_BRANCH;
+    ret->__org_qemu_x_branch = strdup("blah1");
+
+    return ret;
+}
+
+
 /* test commands with no input and no return value */
 static void test_dispatch_cmd(void)
 {