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#

# 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)

{

    if (error_is_set(errp)) {

        return;

    }

    visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp);

    if (obj && !*obj) {

        goto end;

    }

''',

                name=name)

    push_indent()

    ret += generate_visit_struct_body("", members)

    pop_indent()

    ret += mcgen('''

end:

    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, **prev = (GenericList **)obj;

    if (error_is_set(errp)) {

        return;

    }

    visit_start_list(m, name, errp);

    for (; (i = visit_next_list(m, prev, errp)) != NULL; prev = &i) {

        %(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)

{

    Error *err = NULL;

    if (error_is_set(errp)) {

        return;

    }

    visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err);

    if (obj && !*obj) {

        goto end;

    }

    visit_type_%(name)sKind(m, &(*obj)->kind, "type", &err);

    if (err) {

        error_propagate(errp, err);

        goto end;

    }

    switch ((*obj)->kind) {

''',

                 name=name)

    for key in members:

        ret += mcgen('''

    case %(abbrev)s_KIND_%(enum)s:

        visit_type_%(c_type)s(m, &(*obj)->%(c_name)s, "data", errp);

        break;

''',

                abbrev = de_camel_case(name).upper(),

                enum = c_fun(de_camel_case(key)).upper(),

                c_type=members[key],

                c_name=c_fun(key))

    ret += mcgen('''

    default:

        abort();

    }

end:

    visit_end_struct(m, errp);

}

''')

    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:], "chp:o:",

                                   ["source", "header", "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'

do_c = False

do_h = False

for o, a in opts:

    if o in ("-p", "--prefix"):

        prefix = a

    elif o in ("-o", "--output-dir"):

        output_dir = a + "/"

    elif o in ("-c", "--source"):

        do_c = True

    elif o in ("-h", "--header"):

        do_h = True

if not do_c and not do_h:

    do_c = True

    do_h = True

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

def maybe_open(really, name, opt):

    if really:

        return open(name, opt)

    else:

        import StringIO

        return StringIO.StringIO()

fdef = maybe_open(do_c, c_file, 'w')

fdecl = maybe_open(do_h, 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'])

        ret += generate_visit_list(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()