# # QAPI visitor generator # # Copyright IBM, Corp. 2011 # # Authors: # Anthony Liguori # Michael Roth # # 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, name, members): ret = mcgen(''' if (!error_is_set(errp)) { ''') push_indent() if len(field_prefix): field_prefix = field_prefix + "." ret += mcgen(''' Error **errp = &err; /* from outer scope */ Error *err = NULL; visit_start_struct(m, NULL, "", "%(name)s", 0, &err); ''', name=name) else: ret += mcgen(''' Error *err = NULL; visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err); ''', name=name) ret += mcgen(''' if (!err) { if (!obj || *obj) { ''') push_indent() push_indent() for argname, argentry, optional, structured in parse_args(members): if optional: ret += mcgen(''' visit_start_optional(m, obj ? &(*obj)->%(c_prefix)shas_%(c_name)s : NULL, "%(name)s", &err); if (obj && (*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 += generate_visit_struct_body(field_prefix + argname, argname, argentry) else: ret += mcgen(''' visit_type_%(type)s(m, obj ? &(*obj)->%(c_prefix)s%(c_name)s : NULL, "%(name)s", &err); ''', 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, &err); ''') pop_indent() ret += mcgen(''' error_propagate(errp, err); err = NULL; } ''') pop_indent() pop_indent() ret += mcgen(''' /* Always call end_struct if start_struct succeeded. */ visit_end_struct(m, &err); } error_propagate(errp, err); } ''') 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) { ''', name=name) push_indent() ret += generate_visit_struct_body("", name, members) pop_indent() ret += mcgen(''' } ''') 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; Error *err = NULL; if (!error_is_set(errp)) { visit_start_list(m, name, &err); if (!err) { for (; (i = visit_next_list(m, prev, &err)) != NULL; prev = &i) { %(name)sList *native_i = (%(name)sList *)i; visit_type_%(name)s(m, &native_i->value, NULL, &err); } error_propagate(errp, err); err = NULL; /* Always call end_list if start_list succeeded. */ visit_end_list(m, &err); } error_propagate(errp, err); } } ''', 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)) { visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err); if (!err) { if (!obj || *obj) { visit_type_%(name)sKind(m, &(*obj)->kind, "type", &err); if (!err) { switch ((*obj)->kind) { ''', name=name) push_indent() push_indent() for key in members: ret += mcgen(''' case %(abbrev)s_KIND_%(enum)s: visit_type_%(c_type)s(m, &(*obj)->%(c_name)s, "data", &err); 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(); } } error_propagate(errp, err); err = NULL; } ''') pop_indent() ret += mcgen(''' /* Always call end_struct if start_struct succeeded. */ visit_end_struct(m, &err); } error_propagate(errp, err); } ''') pop_indent(); ret += mcgen(''' } ''') 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 * * 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 * * 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()