qemu/scripts/qapi-types.py
Michael Roth fb3182ce6e qapi: add qapi-types.py code generator
This is the code generator for qapi types. It will generation the
following files:

  $(prefix)qapi-types.h - C types corresponding to types defined in
                          the schema you pass in
  $(prefix)qapi-types.c - Cleanup functions for the above C types

The $(prefix) is used to as a namespace to keep the generated code from
one schema/code-generation separated from others so code and be
generated from multiple schemas with clobbering previously created code.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21 16:48:14 -03:00

271 lines
5.6 KiB
Python

#
# QAPI types generator
#
# Copyright IBM, Corp. 2011
#
# Authors:
# Anthony Liguori <aliguori@us.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_fwd_struct(name, members):
return mcgen('''
typedef struct %(name)s %(name)s;
typedef struct %(name)sList
{
%(name)s *value;
struct %(name)sList *next;
} %(name)sList;
''',
name=name)
def generate_struct(structname, fieldname, members):
ret = mcgen('''
struct %(name)s
{
''',
name=structname)
for argname, argentry, optional, structured in parse_args(members):
if optional:
ret += mcgen('''
bool has_%(c_name)s;
''',
c_name=c_var(argname))
if structured:
push_indent()
ret += generate_struct("", argname, argentry)
pop_indent()
else:
ret += mcgen('''
%(c_type)s %(c_name)s;
''',
c_type=c_type(argentry), c_name=c_var(argname))
if len(fieldname):
fieldname = " " + fieldname
ret += mcgen('''
}%(field)s;
''',
field=fieldname)
return ret
def generate_enum_lookup(name, values):
ret = mcgen('''
const char *%(name)s_lookup[] = {
''',
name=name)
i = 0
for value in values:
ret += mcgen('''
"%(value)s",
''',
value=c_var(value).lower())
ret += mcgen('''
NULL,
};
''')
return ret
def generate_enum(name, values):
lookup_decl = mcgen('''
extern const char *%(name)s_lookup[];
''',
name=name)
enum_decl = mcgen('''
typedef enum %(name)s
{
''',
name=name)
i = 0
for value in values:
enum_decl += mcgen('''
%(abbrev)s_%(value)s = %(i)d,
''',
abbrev=de_camel_case(name).upper(),
value=c_var(value).upper(),
i=i)
i += 1
enum_decl += mcgen('''
} %(name)s;
''',
name=name)
return lookup_decl + enum_decl
def generate_union(name, typeinfo):
ret = mcgen('''
struct %(name)s
{
%(name)sKind kind;
union {
''',
name=name)
for key in typeinfo:
ret += mcgen('''
%(c_type)s %(c_name)s;
''',
c_type=c_type(typeinfo[key]),
c_name=c_var(key))
ret += mcgen('''
};
};
''')
return ret
def generate_type_cleanup_decl(name):
ret = mcgen('''
void qapi_free_%(type)s(%(c_type)s obj);
''',
c_type=c_type(name),type=name)
return ret
def generate_type_cleanup(name):
ret = mcgen('''
void qapi_free_%(type)s(%(c_type)s obj)
{
QapiDeallocVisitor *md;
Visitor *v;
if (!obj) {
return;
}
md = qapi_dealloc_visitor_new();
v = qapi_dealloc_get_visitor(md);
visit_type_%(type)s(v, &obj, NULL, NULL);
qapi_dealloc_visitor_cleanup(md);
}
''',
c_type=c_type(name),type=name)
return ret
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-types.c'
h_file = 'qapi-types.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('''
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
/*
* deallocation functions for schema-defined QAPI types
*
* 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 LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qapi/qapi-dealloc-visitor.h"
#include "%(prefix)sqapi-types.h"
#include "%(prefix)sqapi-visit.h"
''', prefix=prefix))
fdecl.write(mcgen('''
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
/*
* schema-defined QAPI types
*
* 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-types-core.h"
''',
guard=guardname(h_file)))
exprs = parse_schema(sys.stdin)
for expr in exprs:
ret = "\n"
if expr.has_key('type'):
ret += generate_fwd_struct(expr['type'], expr['data'])
elif expr.has_key('enum'):
ret += generate_enum(expr['enum'], expr['data'])
fdef.write(generate_enum_lookup(expr['enum'], expr['data']))
elif expr.has_key('union'):
ret += generate_fwd_struct(expr['union'], expr['data']) + "\n"
ret += generate_enum('%sKind' % expr['union'], expr['data'].keys())
else:
continue
fdecl.write(ret)
for expr in exprs:
ret = "\n"
if expr.has_key('type'):
ret += generate_struct(expr['type'], "", expr['data']) + "\n"
ret += generate_type_cleanup_decl(expr['type'])
fdef.write(generate_type_cleanup(expr['type']) + "\n")
elif expr.has_key('union'):
ret += generate_union(expr['union'], expr['data'])
else:
continue
fdecl.write(ret)
fdecl.write('''
#endif
''')
fdecl.flush()
fdecl.close()