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qapi: add qapi-visit.py code generator
This is the code generator for qapi visiter functions used to
marshal/unmarshal/dealloc qapi types. It generates the following 2
files:
$(prefix)qapi-visit.c: visiter function for a particular c type, used
to automagically convert qobjects into the
corresponding C type and vice-versa, and well
as for deallocation memory for an existing C
type
$(prefix)qapi-visit.h: declarations for previously mentioned visiter
functions
$(prefix) is used as decribed for qapi-types.py
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
This commit is contained in:
Michael Roth
Luiz Capitulino
parent
fb3182ce6e
commit
06d64c62dd
1 changed files with 246 additions and 0 deletions
246
scripts/qapi-visit.py
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246
scripts/qapi-visit.py
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#
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# QAPI visitor generator
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#
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# Copyright IBM, Corp. 2011
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#
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# Authors:
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# Anthony Liguori <aliguori@us.ibm.com>
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# Michael Roth <mdroth@linux.vnet.ibm.com>
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#
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# This work is licensed under the terms of the GNU GPLv2.
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# See the COPYING.LIB file in the top-level directory.
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from ordereddict import OrderedDict
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from qapi import *
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import sys
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import os
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import getopt
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import errno
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def generate_visit_struct_body(field_prefix, members):
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ret = ""
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if len(field_prefix):
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field_prefix = field_prefix + "."
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for argname, argentry, optional, structured in parse_args(members):
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if optional:
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ret += mcgen('''
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visit_start_optional(m, (obj && *obj) ? &(*obj)->%(c_prefix)shas_%(c_name)s : NULL, "%(name)s", errp);
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if ((*obj)->%(prefix)shas_%(c_name)s) {
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''',
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c_prefix=c_var(field_prefix), prefix=field_prefix,
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c_name=c_var(argname), name=argname)
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push_indent()
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if structured:
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ret += mcgen('''
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visit_start_struct(m, NULL, "", "%(name)s", 0, errp);
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''',
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name=argname)
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ret += generate_visit_struct_body(field_prefix + argname, argentry)
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ret += mcgen('''
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visit_end_struct(m, errp);
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''')
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else:
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ret += mcgen('''
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visit_type_%(type)s(m, (obj && *obj) ? &(*obj)->%(c_prefix)s%(c_name)s : NULL, "%(name)s", errp);
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''',
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c_prefix=c_var(field_prefix), prefix=field_prefix,
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type=type_name(argentry), c_name=c_var(argname),
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name=argname)
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if optional:
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pop_indent()
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ret += mcgen('''
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}
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visit_end_optional(m, errp);
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''')
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return ret
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def generate_visit_struct(name, members):
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ret = mcgen('''
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void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp)
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{
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visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp);
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''',
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name=name)
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push_indent()
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ret += generate_visit_struct_body("", members)
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pop_indent()
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ret += mcgen('''
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visit_end_struct(m, errp);
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}
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''')
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return ret
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def generate_visit_list(name, members):
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return mcgen('''
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void visit_type_%(name)sList(Visitor *m, %(name)sList ** obj, const char *name, Error **errp)
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{
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GenericList *i;
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visit_start_list(m, name, errp);
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for (i = visit_next_list(m, (GenericList **)obj, errp); i; i = visit_next_list(m, &i, errp)) {
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%(name)sList *native_i = (%(name)sList *)i;
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visit_type_%(name)s(m, &native_i->value, NULL, errp);
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}
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visit_end_list(m, errp);
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}
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''',
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name=name)
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def generate_visit_enum(name, members):
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return mcgen('''
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void visit_type_%(name)s(Visitor *m, %(name)s * obj, const char *name, Error **errp)
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{
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visit_type_enum(m, (int *)obj, %(name)s_lookup, "%(name)s", name, errp);
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}
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''',
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name=name)
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def generate_visit_union(name, members):
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ret = generate_visit_enum('%sKind' % name, members.keys())
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ret += mcgen('''
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void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp)
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{
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}
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''',
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name=name)
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return ret
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def generate_declaration(name, members, genlist=True):
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ret = mcgen('''
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void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp);
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''',
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name=name)
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if genlist:
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ret += mcgen('''
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void visit_type_%(name)sList(Visitor *m, %(name)sList ** obj, const char *name, Error **errp);
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''',
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name=name)
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return ret
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def generate_decl_enum(name, members, genlist=True):
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return mcgen('''
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void visit_type_%(name)s(Visitor *m, %(name)s * obj, const char *name, Error **errp);
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''',
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name=name)
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try:
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opts, args = getopt.gnu_getopt(sys.argv[1:], "p:o:", ["prefix=", "output-dir="])
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except getopt.GetoptError, err:
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print str(err)
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sys.exit(1)
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output_dir = ""
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prefix = ""
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c_file = 'qapi-visit.c'
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h_file = 'qapi-visit.h'
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for o, a in opts:
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if o in ("-p", "--prefix"):
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prefix = a
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elif o in ("-o", "--output-dir"):
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output_dir = a + "/"
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c_file = output_dir + prefix + c_file
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h_file = output_dir + prefix + h_file
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try:
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os.makedirs(output_dir)
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except os.error, e:
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if e.errno != errno.EEXIST:
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raise
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fdef = open(c_file, 'w')
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fdecl = open(h_file, 'w')
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fdef.write(mcgen('''
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/* THIS FILE IS AUTOMATICALLY GENERATED, DO NOT MODIFY */
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/*
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* schema-defined QAPI visitor functions
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "%(header)s"
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''',
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header=basename(h_file)))
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fdecl.write(mcgen('''
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/* THIS FILE IS AUTOMATICALLY GENERATED, DO NOT MODIFY */
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/*
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* schema-defined QAPI visitor function
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#ifndef %(guard)s
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#define %(guard)s
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#include "qapi/qapi-visit-core.h"
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#include "%(prefix)sqapi-types.h"
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''',
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prefix=prefix, guard=guardname(h_file)))
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exprs = parse_schema(sys.stdin)
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for expr in exprs:
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if expr.has_key('type'):
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ret = generate_visit_struct(expr['type'], expr['data'])
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ret += generate_visit_list(expr['type'], expr['data'])
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fdef.write(ret)
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ret = generate_declaration(expr['type'], expr['data'])
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fdecl.write(ret)
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elif expr.has_key('union'):
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ret = generate_visit_union(expr['union'], expr['data'])
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fdef.write(ret)
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ret = generate_decl_enum('%sKind' % expr['union'], expr['data'].keys())
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ret += generate_declaration(expr['union'], expr['data'])
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fdecl.write(ret)
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elif expr.has_key('enum'):
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ret = generate_visit_enum(expr['enum'], expr['data'])
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fdef.write(ret)
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ret = generate_decl_enum(expr['enum'], expr['data'])
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fdecl.write(ret)
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fdecl.write('''
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#endif
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''')
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fdecl.flush()
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fdecl.close()
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fdef.flush()
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fdef.close()
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