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qapi: generate a literal qobject for introspection
Replace the generated json string with a literal qobject. The later is easier to deal with, at run time as well as compile time: adding #if conditionals will be easier than in a json string. The output of query-qmp-schema is not changed. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180305172951.2150-5-marcandre.lureau@redhat.com> [eblake: fix python 3 failure] Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Marc-André Lureau
Eric Blake
parent
3cf42b8b3a
commit
7d0f982bfb
@ -1319,18 +1319,27 @@ Example:
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#ifndef EXAMPLE_QMP_INTROSPECT_H
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#define EXAMPLE_QMP_INTROSPECT_H
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extern const char example_qmp_schema_json[];
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extern const QLitObject qmp_schema_qlit;
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#endif
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$ cat qapi-generated/example-qapi-introspect.c
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[Uninteresting stuff omitted...]
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const char example_qmp_schema_json[] = "["
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"{\"arg-type\": \"0\", \"meta-type\": \"event\", \"name\": \"MY_EVENT\"}, "
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"{\"arg-type\": \"1\", \"meta-type\": \"command\", \"name\": \"my-command\", \"ret-type\": \"2\"}, "
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"{\"members\": [], \"meta-type\": \"object\", \"name\": \"0\"}, "
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"{\"members\": [{\"name\": \"arg1\", \"type\": \"[2]\"}], \"meta-type\": \"object\", \"name\": \"1\"}, "
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"{\"members\": [{\"name\": \"integer\", \"type\": \"int\"}, {\"default\": null, \"name\": \"string\", \"type\": \"str\"}], \"meta-type\": \"object\", \"name\": \"2\"}, "
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"{\"element-type\": \"2\", \"meta-type\": \"array\", \"name\": \"[2]\"}, "
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"{\"json-type\": \"int\", \"meta-type\": \"builtin\", \"name\": \"int\"}, "
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"{\"json-type\": \"string\", \"meta-type\": \"builtin\", \"name\": \"str\"}]";
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const QLitObject example_qmp_schema_qlit = QLIT_QLIST(((QLitObject[]) {
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QLIT_QDICT(((QLitDictEntry[]) {
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{ "arg-type", QLIT_QSTR("0") },
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{ "meta-type", QLIT_QSTR("event") },
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{ "name", QLIT_QSTR("Event") },
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{ }
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})),
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QLIT_QDICT(((QLitDictEntry[]) {
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{ "members", QLIT_QLIST(((QLitObject[]) {
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{ }
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})) },
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{ "meta-type", QLIT_QSTR("object") },
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{ "name", QLIT_QSTR("0") },
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{ }
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})),
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...
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{ }
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}));
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@ -956,7 +956,7 @@ EventInfoList *qmp_query_events(Error **errp)
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static void qmp_query_qmp_schema(QDict *qdict, QObject **ret_data,
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Error **errp)
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{
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*ret_data = qobject_from_json(qmp_schema_json, &error_abort);
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*ret_data = qobject_from_qlit(&qmp_schema_qlit);
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}
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/*
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@ -13,26 +13,36 @@ See the COPYING file in the top-level directory.
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from qapi.common import *
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# Caveman's json.dumps() replacement (we're stuck at Python 2.4)
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# TODO try to use json.dumps() once we get unstuck
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def to_json(obj, level=0):
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def to_qlit(obj, level=0, suppress_first_indent=False):
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def indent(level):
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return level * 4 * ' '
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ret = ''
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if not suppress_first_indent:
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ret += indent(level)
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if obj is None:
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ret = 'null'
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ret += 'QLIT_QNULL'
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elif isinstance(obj, str):
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ret = '"' + obj.replace('"', r'\"') + '"'
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ret += 'QLIT_QSTR(' + to_c_string(obj) + ')'
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elif isinstance(obj, list):
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elts = [to_json(elt, level + 1)
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elts = [to_qlit(elt, level + 1)
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for elt in obj]
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ret = '[' + ', '.join(elts) + ']'
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elts.append(indent(level + 1) + "{}")
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ret += 'QLIT_QLIST(((QLitObject[]) {\n'
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ret += ',\n'.join(elts) + '\n'
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ret += indent(level) + '}))'
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elif isinstance(obj, dict):
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elts = ['"%s": %s' % (key.replace('"', r'\"'),
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to_json(obj[key], level + 1))
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for key in sorted(obj.keys())]
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ret = '{' + ', '.join(elts) + '}'
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elts = []
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for key, value in sorted(obj.items()):
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elts.append(indent(level + 1) + '{ %s, %s }' %
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(to_c_string(key), to_qlit(value, level + 1, True)))
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elts.append(indent(level + 1) + '{}')
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ret += 'QLIT_QDICT(((QLitDictEntry[]) {\n'
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ret += ',\n'.join(elts) + '\n'
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ret += indent(level) + '}))'
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else:
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assert False # not implemented
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if level == 1:
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ret = '\n' + ret
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return ret
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@ -48,7 +58,7 @@ class QAPISchemaGenIntrospectVisitor(QAPISchemaMonolithicCVisitor):
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' * QAPI/QMP schema introspection', __doc__)
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self._unmask = unmask
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self._schema = None
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self._jsons = []
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self._qlits = []
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self._used_types = []
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self._name_map = {}
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self._genc.add(mcgen('''
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@ -63,27 +73,27 @@ class QAPISchemaGenIntrospectVisitor(QAPISchemaMonolithicCVisitor):
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def visit_end(self):
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# visit the types that are actually used
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jsons = self._jsons
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self._jsons = []
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qlits = self._qlits
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self._qlits = []
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for typ in self._used_types:
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typ.visit(self)
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# generate C
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# TODO can generate awfully long lines
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jsons.extend(self._jsons)
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name = c_name(self._prefix, protect=False) + 'qmp_schema_json'
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qlits.extend(self._qlits)
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name = c_name(self._prefix, protect=False) + 'qmp_schema_qlit'
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self._genh.add(mcgen('''
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extern const char %(c_name)s[];
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#include "qapi/qmp/qlit.h"
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extern const QLitObject %(c_name)s;
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''',
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c_name=c_name(name)))
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lines = to_json(jsons).split('\n')
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c_string = '\n '.join([to_c_string(line) for line in lines])
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self._genc.add(mcgen('''
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const char %(c_name)s[] = %(c_string)s;
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const QLitObject %(c_name)s = %(c_string)s;
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''',
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c_name=c_name(name),
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c_string=c_string))
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c_string=to_qlit(qlits)))
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self._schema = None
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self._jsons = []
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self._qlits = []
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self._used_types = []
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self._name_map = {}
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@ -117,12 +127,12 @@ const char %(c_name)s[] = %(c_string)s;
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return '[' + self._use_type(typ.element_type) + ']'
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return self._name(typ.name)
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def _gen_json(self, name, mtype, obj):
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def _gen_qlit(self, name, mtype, obj):
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if mtype not in ('command', 'event', 'builtin', 'array'):
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name = self._name(name)
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obj['name'] = name
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obj['meta-type'] = mtype
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self._jsons.append(obj)
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self._qlits.append(obj)
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def _gen_member(self, member):
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ret = {'name': member.name, 'type': self._use_type(member.type)}
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@ -138,24 +148,24 @@ const char %(c_name)s[] = %(c_string)s;
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return {'case': variant.name, 'type': self._use_type(variant.type)}
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def visit_builtin_type(self, name, info, json_type):
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self._gen_json(name, 'builtin', {'json-type': json_type})
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self._gen_qlit(name, 'builtin', {'json-type': json_type})
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def visit_enum_type(self, name, info, values, prefix):
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self._gen_json(name, 'enum', {'values': values})
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self._gen_qlit(name, 'enum', {'values': values})
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def visit_array_type(self, name, info, element_type):
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element = self._use_type(element_type)
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self._gen_json('[' + element + ']', 'array', {'element-type': element})
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self._gen_qlit('[' + element + ']', 'array', {'element-type': element})
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def visit_object_type_flat(self, name, info, members, variants):
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obj = {'members': [self._gen_member(m) for m in members]}
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if variants:
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obj.update(self._gen_variants(variants.tag_member.name,
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variants.variants))
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self._gen_json(name, 'object', obj)
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self._gen_qlit(name, 'object', obj)
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def visit_alternate_type(self, name, info, variants):
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self._gen_json(name, 'alternate',
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self._gen_qlit(name, 'alternate',
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{'members': [{'type': self._use_type(m.type)}
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for m in variants.variants]})
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@ -163,13 +173,13 @@ const char %(c_name)s[] = %(c_string)s;
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gen, success_response, boxed):
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arg_type = arg_type or self._schema.the_empty_object_type
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ret_type = ret_type or self._schema.the_empty_object_type
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self._gen_json(name, 'command',
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self._gen_qlit(name, 'command',
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{'arg-type': self._use_type(arg_type),
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'ret-type': self._use_type(ret_type)})
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def visit_event(self, name, info, arg_type, boxed):
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arg_type = arg_type or self._schema.the_empty_object_type
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self._gen_json(name, 'event', {'arg-type': self._use_type(arg_type)})
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self._gen_qlit(name, 'event', {'arg-type': self._use_type(arg_type)})
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def gen_introspect(schema, output_dir, prefix, opt_unmask):
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@ -1250,24 +1250,27 @@ static void test_visitor_in_fail_alternate(TestInputVisitorData *data,
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}
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static void do_test_visitor_in_qmp_introspect(TestInputVisitorData *data,
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const char *schema_json)
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const QLitObject *qlit)
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{
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SchemaInfoList *schema = NULL;
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QObject *obj = qobject_from_qlit(qlit);
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Visitor *v;
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v = visitor_input_test_init_raw(data, schema_json);
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v = qobject_input_visitor_new(obj);
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visit_type_SchemaInfoList(v, NULL, &schema, &error_abort);
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g_assert(schema);
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qapi_free_SchemaInfoList(schema);
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qobject_decref(obj);
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visit_free(v);
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}
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static void test_visitor_in_qmp_introspect(TestInputVisitorData *data,
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const void *unused)
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{
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do_test_visitor_in_qmp_introspect(data, test_qmp_schema_json);
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do_test_visitor_in_qmp_introspect(data, qmp_schema_json);
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do_test_visitor_in_qmp_introspect(data, &test_qmp_schema_qlit);
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do_test_visitor_in_qmp_introspect(data, &qmp_schema_qlit);
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}
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int main(int argc, char **argv)
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