--- /dev/null
+#
+# QAPI event generator
+#
+# Copyright (c) 2014 Wenchao Xia
+#
+# Authors:
+# Wenchao Xia <wenchaoqemu@gmail.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2.
+# See the COPYING file in the top-level directory.
+
+from ordereddict import OrderedDict
+from qapi import *
+
+def _generate_event_api_name(event_name, params):
+ api_name = "void qapi_event_send_%s(" % c_name(event_name).lower();
+ l = len(api_name)
+
+ if params:
+ for argname, argentry, optional in parse_args(params):
+ if optional:
+ api_name += "bool has_%s,\n" % c_name(argname)
+ api_name += "".ljust(l)
+
+ api_name += "%s %s,\n" % (c_type(argentry, is_param=True),
+ c_name(argname))
+ api_name += "".ljust(l)
+
+ api_name += "Error **errp)"
+ return api_name;
+
+
+# Following are the core functions that generate C APIs to emit event.
+
+def generate_event_declaration(api_name):
+ return mcgen('''
+
+%(api_name)s;
+''',
+ api_name = api_name)
+
+def generate_event_implement(api_name, event_name, params):
+ # step 1: declare any variables
+ ret = mcgen("""
+
+%(api_name)s
+{
+ QDict *qmp;
+ Error *local_err = NULL;
+ QMPEventFuncEmit emit;
+""",
+ api_name = api_name)
+
+ if params:
+ ret += mcgen("""
+ QmpOutputVisitor *qov;
+ Visitor *v;
+ QObject *obj;
+
+""")
+
+ # step 2: check emit function, create a dict
+ ret += mcgen("""
+ emit = qmp_event_get_func_emit();
+ if (!emit) {
+ return;
+ }
+
+ qmp = qmp_event_build_dict("%(event_name)s");
+
+""",
+ event_name = event_name)
+
+ # step 3: visit the params if params != None
+ if params:
+ ret += mcgen("""
+ qov = qmp_output_visitor_new();
+ g_assert(qov);
+
+ v = qmp_output_get_visitor(qov);
+ g_assert(v);
+
+ /* Fake visit, as if all members are under a structure */
+ visit_start_struct(v, NULL, "", "%(event_name)s", 0, &local_err);
+ if (local_err) {
+ goto clean;
+ }
+
+""",
+ event_name = event_name)
+
+ for argname, argentry, optional in parse_args(params):
+ if optional:
+ ret += mcgen("""
+ if (has_%(var)s) {
+""",
+ var = c_name(argname))
+ push_indent()
+
+ if argentry == "str":
+ var_type = "(char **)"
+ else:
+ var_type = ""
+
+ ret += mcgen("""
+ visit_type_%(type)s(v, %(var_type)s&%(var)s, "%(name)s", &local_err);
+ if (local_err) {
+ goto clean;
+ }
+""",
+ var_type = var_type,
+ var = c_name(argname),
+ type = type_name(argentry),
+ name = argname)
+
+ if optional:
+ pop_indent()
+ ret += mcgen("""
+ }
+""")
+
+ ret += mcgen("""
+
+ visit_end_struct(v, &local_err);
+ if (local_err) {
+ goto clean;
+ }
+
+ obj = qmp_output_get_qobject(qov);
+ g_assert(obj != NULL);
+
+ qdict_put_obj(qmp, "data", obj);
+""")
+
+ # step 4: call qmp event api
+ ret += mcgen("""
+ emit(%(event_enum_value)s, qmp, &local_err);
+
+""",
+ event_enum_value = event_enum_value)
+
+ # step 5: clean up
+ if params:
+ ret += mcgen("""
+ clean:
+ qmp_output_visitor_cleanup(qov);
+""")
+ ret += mcgen("""
+ error_propagate(errp, local_err);
+ QDECREF(qmp);
+}
+""")
+
+ return ret
+
+
+# Following are the functions that generate an enum type for all defined
+# events, similar to qapi-types.py. Here we already have enum name and
+# values which were generated before and recorded in event_enum_*. It also
+# works around the issue that "import qapi-types" can't work.
+
+def generate_event_enum_decl(event_enum_name, event_enum_values):
+ lookup_decl = mcgen('''
+
+extern const char *%(event_enum_name)s_lookup[];
+''',
+ event_enum_name = event_enum_name)
+
+ enum_decl = mcgen('''
+typedef enum %(event_enum_name)s
+{
+''',
+ event_enum_name = event_enum_name)
+
+ # append automatically generated _MAX value
+ enum_max_value = c_enum_const(event_enum_name, "MAX")
+ enum_values = event_enum_values + [ enum_max_value ]
+
+ i = 0
+ for value in enum_values:
+ enum_decl += mcgen('''
+ %(value)s = %(i)d,
+''',
+ value = value,
+ i = i)
+ i += 1
+
+ enum_decl += mcgen('''
+} %(event_enum_name)s;
+''',
+ event_enum_name = event_enum_name)
+
+ return lookup_decl + enum_decl
+
+def generate_event_enum_lookup(event_enum_name, event_enum_strings):
+ ret = mcgen('''
+
+const char *%(event_enum_name)s_lookup[] = {
+''',
+ event_enum_name = event_enum_name)
+
+ i = 0
+ for string in event_enum_strings:
+ ret += mcgen('''
+ "%(string)s",
+''',
+ string = string)
+
+ ret += mcgen('''
+ NULL,
+};
+''')
+ return ret
+
+(input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
+
+c_comment = '''
+/*
+ * schema-defined QAPI event functions
+ *
+ * Copyright (c) 2014 Wenchao Xia
+ *
+ * Authors:
+ * Wenchao Xia <wenchaoqemu@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+'''
+h_comment = '''
+/*
+ * schema-defined QAPI event functions
+ *
+ * Copyright (c) 2014 Wenchao Xia
+ *
+ * Authors:
+ * Wenchao Xia <wenchaoqemu@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+'''
+
+(fdef, fdecl) = open_output(output_dir, do_c, do_h, prefix,
+ 'qapi-event.c', 'qapi-event.h',
+ c_comment, h_comment)
+
+fdef.write(mcgen('''
+#include "qemu-common.h"
+#include "%(prefix)sqapi-event.h"
+#include "%(prefix)sqapi-visit.h"
+#include "qapi/qmp-output-visitor.h"
+#include "qapi/qmp-event.h"
+
+''',
+ prefix=prefix))
+
+fdecl.write(mcgen('''
+#include "qapi/error.h"
+#include "qapi/qmp/qdict.h"
+#include "%(prefix)sqapi-types.h"
+
+''',
+ prefix=prefix))
+
+exprs = parse_schema(input_file)
+
+event_enum_name = prefix.upper().replace('-', '_') + "QAPIEvent"
+event_enum_values = []
+event_enum_strings = []
+
+for expr in exprs:
+ if expr.has_key('event'):
+ event_name = expr['event']
+ params = expr.get('data')
+ if params and len(params) == 0:
+ params = None
+
+ api_name = _generate_event_api_name(event_name, params)
+ ret = generate_event_declaration(api_name)
+ fdecl.write(ret)
+
+ # We need an enum value per event
+ event_enum_value = c_enum_const(event_enum_name, event_name)
+ ret = generate_event_implement(api_name, event_name, params)
+ fdef.write(ret)
+
+ # Record it, and generate enum later
+ event_enum_values.append(event_enum_value)
+ event_enum_strings.append(event_name)
+
+ret = generate_event_enum_decl(event_enum_name, event_enum_values)
+fdecl.write(ret)
+ret = generate_event_enum_lookup(event_enum_name, event_enum_strings)
+fdef.write(ret)
+
+close_output(fdef, fdecl)
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