From patchwork Mon Jan 20 14:19:46 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunyan Liu X-Patchwork-Id: 312619 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id C55462C0078 for ; Tue, 21 Jan 2014 02:30:35 +1100 (EST) Received: from localhost ([::1]:52342 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5Fl0-0006dc-A2 for incoming@patchwork.ozlabs.org; Mon, 20 Jan 2014 09:23:18 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48901) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5FiP-0002Mz-KF for qemu-devel@nongnu.org; Mon, 20 Jan 2014 09:20:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W5FiJ-0006Xv-0f for qemu-devel@nongnu.org; Mon, 20 Jan 2014 09:20:37 -0500 Received: from victor.provo.novell.com ([137.65.250.26]:48073) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5FiI-0006Wk-M1 for qemu-devel@nongnu.org; Mon, 20 Jan 2014 09:20:30 -0500 Received: from localhost.localdomain (prv-ext-foundry1int.gns.novell.com [137.65.251.240]) by victor.provo.novell.com with ESMTP (TLS encrypted); Mon, 20 Jan 2014 07:20:14 -0700 From: Chunyan Liu To: qemu-devel@nongnu.org, stefanha@redhat.com, kwolf@redhat.com Date: Mon, 20 Jan 2014 22:19:46 +0800 Message-Id: <1390227608-7225-4-git-send-email-cyliu@suse.com> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1390227608-7225-1-git-send-email-cyliu@suse.com> References: <1390227608-7225-1-git-send-email-cyliu@suse.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x X-Received-From: 137.65.250.26 Cc: Dong Xu Wang , Chunyan Liu Subject: [Qemu-devel] [v19 03/25] improve some functions in qemu-option.c X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Improve opt_get and opt_set group of functions. For opt_get, check and handle NUlL input; for opt_set, when set to an existing option, rewrite the option with new value. Signed-off-by: Dong Xu Wang Signed-off-by: Chunyan Liu --- util/qemu-option.c | 80 ++++++++++++++++++++++++++++++++++++++++++--------- 1 files changed, 66 insertions(+), 14 deletions(-) diff --git a/util/qemu-option.c b/util/qemu-option.c index fd84f95..8944b62 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -499,6 +499,9 @@ static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) { QemuOpt *opt; + if (!opts) + return NULL; + QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { if (strcmp(opt->name, name) != 0) continue; @@ -509,9 +512,13 @@ static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) const char *qemu_opt_get(QemuOpts *opts, const char *name) { - QemuOpt *opt = qemu_opt_find(opts, name); + QemuOpt *opt; const QemuOptDesc *desc; + if (!opts) + return NULL; + + opt = qemu_opt_find(opts, name); if (!opt) { desc = find_desc_by_name(opts->list->desc, name); if (desc && desc->def_value_str) { @@ -535,10 +542,15 @@ bool qemu_opt_has_help_opt(QemuOpts *opts) bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) { - QemuOpt *opt = qemu_opt_find(opts, name); + QemuOpt *opt; const QemuOptDesc *desc; Error *local_err = NULL; + if (!opts) + return defval; + + opt = qemu_opt_find(opts, name); + if (opt == NULL) { desc = find_desc_by_name(opts->list->desc, name); if (desc && desc->def_value_str) { @@ -553,10 +565,15 @@ bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) { - QemuOpt *opt = qemu_opt_find(opts, name); + QemuOpt *opt; const QemuOptDesc *desc; Error *local_err = NULL; + if (!opts) + return defval; + + opt = qemu_opt_find(opts, name); + if (opt == NULL) { desc = find_desc_by_name(opts->list->desc, name); if (desc && desc->def_value_str) { @@ -571,10 +588,14 @@ uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) { - QemuOpt *opt = qemu_opt_find(opts, name); + QemuOpt *opt; const QemuOptDesc *desc; Error *local_err = NULL; + if (!opts) + return defval; + + opt = qemu_opt_find(opts, name); if (opt == NULL) { desc = find_desc_by_name(opts->list->desc, name); if (desc && desc->def_value_str) { @@ -612,6 +633,10 @@ static void qemu_opt_parse(QemuOpt *opt, Error **errp) static void qemu_opt_del(QemuOpt *opt) { + if (!opt) { + return; + } + QTAILQ_REMOVE(&opt->opts->head, opt, next); g_free((/* !const */ char*)opt->name); g_free((/* !const */ char*)opt->str); @@ -664,6 +689,13 @@ static void opt_set(QemuOpts *opts, const char *name, const char *value, return; } + opt = qemu_opt_find(opts, name); + if (opt) { + g_free((char*)opt->str); + opt->str = g_strdup(value); + return; + } + opt = g_malloc0(sizeof(*opt)); opt->name = g_strdup(name); opt->opts = opts; @@ -704,16 +736,24 @@ void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value, int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val) { QemuOpt *opt; - const QemuOptDesc *desc = opts->list->desc; + const QemuOptDesc *desc; - opt = g_malloc0(sizeof(*opt)); - opt->desc = find_desc_by_name(desc, name); - if (!opt->desc && !opts_accepts_any(opts)) { + desc = find_desc_by_name(opts->list->desc, name); + if (!desc && !opts_accepts_any(opts)) { qerror_report(QERR_INVALID_PARAMETER, name); - g_free(opt); return -1; } + opt = qemu_opt_find(opts, name); + if (opt) { + g_free((char*)opt->str); + opt->value.boolean =val; + opt->str = g_strdup(val ? "on" : "off"); + return 0; + } + + opt = g_malloc0(sizeof(*opt)); + opt->desc = desc; opt->name = g_strdup(name); opt->opts = opts; opt->value.boolean = !!val; @@ -726,16 +766,24 @@ int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val) int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val) { QemuOpt *opt; - const QemuOptDesc *desc = opts->list->desc; + const QemuOptDesc *desc; - opt = g_malloc0(sizeof(*opt)); - opt->desc = find_desc_by_name(desc, name); - if (!opt->desc && !opts_accepts_any(opts)) { + desc = find_desc_by_name(opts->list->desc, name); + if (!desc && !opts_accepts_any(opts)) { qerror_report(QERR_INVALID_PARAMETER, name); - g_free(opt); return -1; } + opt = qemu_opt_find(opts, name); + if (opt) { + g_free((char*)opt->str); + opt->value.uint = val; + opt->str = g_strdup_printf("%" PRId64, val); + return 0; + } + + opt = g_malloc0(sizeof(*opt)); + opt->desc = desc; opt->name = g_strdup(name); opt->opts = opts; opt->value.uint = val; @@ -870,6 +918,10 @@ void qemu_opts_del(QemuOpts *opts) { QemuOpt *opt; + if (!opts) { + return; + } + for (;;) { opt = QTAILQ_FIRST(&opts->head); if (opt == NULL)