From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35443) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZkZNR-0001Yp-EC for qemu-devel@nongnu.org; Fri, 09 Oct 2015 11:14:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZkZNP-0006zR-HK for qemu-devel@nongnu.org; Fri, 09 Oct 2015 11:14:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41778) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZkZNP-0006z5-8k for qemu-devel@nongnu.org; Fri, 09 Oct 2015 11:14:31 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id D19B7319AE8 for ; Fri, 9 Oct 2015 15:14:30 +0000 (UTC) From: Markus Armbruster Date: Fri, 9 Oct 2015 17:14:19 +0200 Message-Id: <1444403661-29161-19-git-send-email-armbru@redhat.com> In-Reply-To: <1444403661-29161-1-git-send-email-armbru@redhat.com> References: <1444403661-29161-1-git-send-email-armbru@redhat.com> Subject: [Qemu-devel] [PULL 18/20] qapi: Share gen_err_check() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org From: Eric Blake qapi-commands has a nice helper gen_err_check(), but did not use it everywhere. In fact, using it in more places makes it easier to reduce the lines of code used for generating error checks. This in turn will make it easier for later patches to consolidate another common pattern among the generators. The generated code has fewer blank lines in qapi-event.c functions, but has no semantic difference. Signed-off-by: Eric Blake Message-Id: <1443565276-4535-16-git-send-email-eblake@redhat.com> [Drop another blank line for symmetry] Signed-off-by: Markus Armbruster --- scripts/qapi-commands.py | 17 +++-------------- scripts/qapi-event.py | 10 ++-------- scripts/qapi-visit.py | 14 +++----------- scripts/qapi.py | 12 ++++++++++++ 4 files changed, 20 insertions(+), 33 deletions(-) diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py index 267991e..4e99c1d 100644 --- a/scripts/qapi-commands.py +++ b/scripts/qapi-commands.py @@ -25,17 +25,6 @@ def gen_command_decl(name, arg_type, ret_type): params=gen_params(arg_type, 'Error **errp')) -def gen_err_check(err): - if not err: - return '' - return mcgen(''' - if (%(err)s) { - goto out; - } -''', - err=err) - - def gen_call(name, arg_type, ret_type): ret = '' @@ -56,7 +45,7 @@ def gen_call(name, arg_type, ret_type): ''', c_name=c_name(name), args=argstr, lhs=lhs) if ret_type: - ret += gen_err_check('err') + ret += gen_err_check() ret += mcgen(''' qmp_marshal_output_%(c_name)s(retval, ret, &err); @@ -133,7 +122,7 @@ def gen_marshal_input_visit(arg_type, dealloc=False): ''', c_name=c_name(memb.name), name=memb.name, errp=errparg) - ret += gen_err_check(errarg) + ret += gen_err_check(err=errarg) ret += mcgen(''' if (has_%(c_name)s) { ''', @@ -144,7 +133,7 @@ def gen_marshal_input_visit(arg_type, dealloc=False): ''', c_name=c_name(memb.name), name=memb.name, c_type=memb.type.c_name(), errp=errparg) - ret += gen_err_check(errarg) + ret += gen_err_check(err=errarg) if memb.optional: pop_indent() ret += mcgen(''' diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py index b5a9d4f..eaaac05 100644 --- a/scripts/qapi-event.py +++ b/scripts/qapi-event.py @@ -68,12 +68,9 @@ def gen_event_send(name, arg_type): /* Fake visit, as if all members are under a structure */ visit_start_struct(v, NULL, "", "%(name)s", 0, &err); - if (err) { - goto out; - } - ''', name=name) + ret += gen_err_check() for memb in arg_type.members: if memb.optional: @@ -91,14 +88,12 @@ def gen_event_send(name, arg_type): ret += mcgen(''' visit_type_%(c_type)s(v, %(cast)s&%(c_name)s, "%(name)s", &err); - if (err) { - goto out; - } ''', cast=cast, c_name=c_name(memb.name), c_type=memb.type.c_name(), name=memb.name) + ret += gen_err_check() if memb.optional: pop_indent() @@ -107,7 +102,6 @@ def gen_event_send(name, arg_type): ''') ret += mcgen(''' - visit_end_struct(v, &err); if (err) { goto out; diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py index 78ad556..bc6911f 100644 --- a/scripts/qapi-visit.py +++ b/scripts/qapi-visit.py @@ -81,11 +81,9 @@ static void visit_type_%(c_name)s_fields(Visitor *v, %(c_name)s **obj, Error **e if base: ret += mcgen(''' visit_type_implicit_%(c_type)s(v, &(*obj)->%(c_name)s, &err); - if (err) { - goto out; - } ''', c_type=base.c_name(), c_name=c_name('base')) + ret += gen_err_check() for memb in members: if memb.optional: @@ -107,11 +105,7 @@ static void visit_type_%(c_name)s_fields(Visitor *v, %(c_name)s **obj, Error **e ret += mcgen(''' } ''') - ret += mcgen(''' - if (err) { - goto out; - } -''') + ret += gen_err_check() if re.search('^ *goto out;', ret, re.MULTILINE): ret += mcgen(''' @@ -271,11 +265,9 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error if base: ret += mcgen(''' visit_type_%(c_name)s_fields(v, obj, &err); - if (err) { - goto out_obj; - } ''', c_name=c_name(name)) + ret += gen_err_check(label='out_obj') tag_key = variants.tag_member.name if not variants.tag_name: diff --git a/scripts/qapi.py b/scripts/qapi.py index c0728d7..62a415c 100644 --- a/scripts/qapi.py +++ b/scripts/qapi.py @@ -1536,6 +1536,18 @@ def gen_params(arg_type, extra): ret += sep + extra return ret + +def gen_err_check(err='err', label='out'): + if not err: + return '' + return mcgen(''' + if (%(err)s) { + goto %(label)s; + } +''', + err=err, label=label) + + # # Common command line parsing # -- 2.4.3