qapi: add qapi-types.py code generator

#

# 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()