qemu/scripts/qapi-visit.py
Michael Roth e1bc2f7b3f qapi: modify visitor code generation for list iteration
Modify logic such that we never assign values to the list head argument
to progress through the list on subsequent iterations, instead rely only
on having our return value passed back in as an argument on the next
call. Also update QMP I/O visitors and test cases accordingly, and add a
missing test case for QmpOutputVisitor.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2011-10-04 11:00:46 -03:00

247 lines
6.1 KiB
Python

#
# QAPI visitor generator
#
# Copyright IBM, Corp. 2011
#
# Authors:
# Anthony Liguori <aliguori@us.ibm.com>
# Michael Roth <mdroth@linux.vnet.ibm.com>
#
# This work is licensed under the terms of the GNU GPLv2.
# See the COPYING.LIB file in the top-level directory.
from ordereddict import OrderedDict
from qapi import *
import sys
import os
import getopt
import errno
def generate_visit_struct_body(field_prefix, members):
ret = ""
if len(field_prefix):
field_prefix = field_prefix + "."
for argname, argentry, optional, structured in parse_args(members):
if optional:
ret += mcgen('''
visit_start_optional(m, (obj && *obj) ? &(*obj)->%(c_prefix)shas_%(c_name)s : NULL, "%(name)s", errp);
if ((*obj)->%(prefix)shas_%(c_name)s) {
''',
c_prefix=c_var(field_prefix), prefix=field_prefix,
c_name=c_var(argname), name=argname)
push_indent()
if structured:
ret += mcgen('''
visit_start_struct(m, NULL, "", "%(name)s", 0, errp);
''',
name=argname)
ret += generate_visit_struct_body(field_prefix + argname, argentry)
ret += mcgen('''
visit_end_struct(m, errp);
''')
else:
ret += mcgen('''
visit_type_%(type)s(m, (obj && *obj) ? &(*obj)->%(c_prefix)s%(c_name)s : NULL, "%(name)s", errp);
''',
c_prefix=c_var(field_prefix), prefix=field_prefix,
type=type_name(argentry), c_name=c_var(argname),
name=argname)
if optional:
pop_indent()
ret += mcgen('''
}
visit_end_optional(m, errp);
''')
return ret
def generate_visit_struct(name, members):
ret = mcgen('''
void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp)
{
visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp);
''',
name=name)
push_indent()
ret += generate_visit_struct_body("", members)
pop_indent()
ret += mcgen('''
visit_end_struct(m, errp);
}
''')
return ret
def generate_visit_list(name, members):
return mcgen('''
void visit_type_%(name)sList(Visitor *m, %(name)sList ** obj, const char *name, Error **errp)
{
GenericList *i, **head = (GenericList **)obj;
visit_start_list(m, name, errp);
for (*head = i = visit_next_list(m, head, errp); i; i = visit_next_list(m, &i, errp)) {
%(name)sList *native_i = (%(name)sList *)i;
visit_type_%(name)s(m, &native_i->value, NULL, errp);
}
visit_end_list(m, errp);
}
''',
name=name)
def generate_visit_enum(name, members):
return mcgen('''
void visit_type_%(name)s(Visitor *m, %(name)s * obj, const char *name, Error **errp)
{
visit_type_enum(m, (int *)obj, %(name)s_lookup, "%(name)s", name, errp);
}
''',
name=name)
def generate_visit_union(name, members):
ret = generate_visit_enum('%sKind' % name, members.keys())
ret += mcgen('''
void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp)
{
}
''',
name=name)
return ret
def generate_declaration(name, members, genlist=True):
ret = mcgen('''
void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp);
''',
name=name)
if genlist:
ret += mcgen('''
void visit_type_%(name)sList(Visitor *m, %(name)sList ** obj, const char *name, Error **errp);
''',
name=name)
return ret
def generate_decl_enum(name, members, genlist=True):
return mcgen('''
void visit_type_%(name)s(Visitor *m, %(name)s * obj, const char *name, Error **errp);
''',
name=name)
try:
opts, args = getopt.gnu_getopt(sys.argv[1:], "p:o:", ["prefix=", "output-dir="])
except getopt.GetoptError, err:
print str(err)
sys.exit(1)
output_dir = ""
prefix = ""
c_file = 'qapi-visit.c'
h_file = 'qapi-visit.h'
for o, a in opts:
if o in ("-p", "--prefix"):
prefix = a
elif o in ("-o", "--output-dir"):
output_dir = a + "/"
c_file = output_dir + prefix + c_file
h_file = output_dir + prefix + h_file
try:
os.makedirs(output_dir)
except os.error, e:
if e.errno != errno.EEXIST:
raise
fdef = open(c_file, 'w')
fdecl = open(h_file, 'w')
fdef.write(mcgen('''
/* THIS FILE IS AUTOMATICALLY GENERATED, DO NOT MODIFY */
/*
* schema-defined QAPI visitor functions
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.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.
*
*/
#include "%(header)s"
''',
header=basename(h_file)))
fdecl.write(mcgen('''
/* THIS FILE IS AUTOMATICALLY GENERATED, DO NOT MODIFY */
/*
* schema-defined QAPI visitor function
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.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.
*
*/
#ifndef %(guard)s
#define %(guard)s
#include "qapi/qapi-visit-core.h"
#include "%(prefix)sqapi-types.h"
''',
prefix=prefix, guard=guardname(h_file)))
exprs = parse_schema(sys.stdin)
for expr in exprs:
if expr.has_key('type'):
ret = generate_visit_struct(expr['type'], expr['data'])
ret += generate_visit_list(expr['type'], expr['data'])
fdef.write(ret)
ret = generate_declaration(expr['type'], expr['data'])
fdecl.write(ret)
elif expr.has_key('union'):
ret = generate_visit_union(expr['union'], expr['data'])
fdef.write(ret)
ret = generate_decl_enum('%sKind' % expr['union'], expr['data'].keys())
ret += generate_declaration(expr['union'], expr['data'])
fdecl.write(ret)
elif expr.has_key('enum'):
ret = generate_visit_enum(expr['enum'], expr['data'])
fdef.write(ret)
ret = generate_decl_enum(expr['enum'], expr['data'])
fdecl.write(ret)
fdecl.write('''
#endif
''')
fdecl.flush()
fdecl.close()
fdef.flush()
fdef.close()