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bh=TEAlKqwM+60ep7QN+s9ZMLJy18GtUzwQAfwiX+zsRjs=; b=aGYUBbSajZgdEnzhx+dm4tMiiiOHbjTocv06hfnR7pfkQ+ovsQ0/Pe8FzXaTodpRO/UrCD wDc+HsM+2tWXS+W0Zo0mpNe308bQBge3F8DmtQCwdbYzNBNwmg3zf2WiZ99B83Xs7ClZJ1 RhhGkhQb7NxyYgk9vkLoPFTHYzmxpM0= X-MC-Unique: hlPWUKooNViMC9ERogdQIw-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 09/28] keyval: introduce keyval_parse_into Date: Wed, 2 Dec 2020 04:02:46 -0500 Message-Id: <20201202090305.4129317-10-pbonzini@redhat.com> In-Reply-To: <20201202090305.4129317-1-pbonzini@redhat.com> References: <20201202090305.4129317-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, imammedo@redhat.com, armbru@redhat.com, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Allow parsing multiple keyval sequences into the same dictionary. Signed-off-by: Paolo Bonzini --- include/qemu/option.h | 2 ++ util/keyval.c | 39 ++++++++++++++++++++++++++++++++------- 2 files changed, 34 insertions(+), 7 deletions(-) diff --git a/include/qemu/option.h b/include/qemu/option.h index f73e0dc7d9..092e291c37 100644 --- a/include/qemu/option.h +++ b/include/qemu/option.h @@ -147,6 +147,8 @@ void qemu_opts_print_help(QemuOptsList *list, bool prin= t_caption); void qemu_opts_free(QemuOptsList *list); QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list); =20 +QDict *keyval_parse_into(QDict *qdict, const char *params, const char *imp= lied_key, + bool *p_help, Error **errp); QDict *keyval_parse(const char *params, const char *implied_key, bool *help, Error **errp); =20 diff --git a/util/keyval.c b/util/keyval.c index e7f708cd1e..1d4ca12129 100644 --- a/util/keyval.c +++ b/util/keyval.c @@ -436,13 +436,12 @@ static QObject *keyval_listify(QDict *cur, GSList *ke= y_of_cur, Error **errp) * If @p_help is not NULL, store whether help is requested there. * If @p_help is NULL and help is requested, fail. * - * On success, return a dictionary of the parsed keys and values. + * On success, return @dict, now filled with the parsed keys and values. * On failure, store an error through @errp and return NULL. */ -QDict *keyval_parse(const char *params, const char *implied_key, - bool *p_help, Error **errp) +QDict *keyval_parse_into(QDict *qdict, const char *params, const char *imp= lied_key, + bool *p_help, Error **errp) { - QDict *qdict =3D qdict_new(); QObject *listified; g_autofree char *dup; char *s; @@ -452,7 +451,6 @@ QDict *keyval_parse(const char *params, const char *imp= lied_key, while (*s) { s =3D keyval_parse_one(qdict, s, implied_key, &help, errp); if (!s) { - qobject_unref(qdict); return NULL; } implied_key =3D NULL; @@ -462,15 +460,42 @@ QDict *keyval_parse(const char *params, const char *i= mplied_key, *p_help =3D help; } else if (help) { error_setg(errp, "Help is not available for this option"); - qobject_unref(qdict); return NULL; } =20 listified =3D keyval_listify(qdict, NULL, errp); if (!listified) { - qobject_unref(qdict); return NULL; } assert(listified =3D=3D QOBJECT(qdict)); return qdict; } + +/* + * Parse @params in QEMU's traditional KEY=3DVALUE,... syntax. + * + * If @implied_key, the first KEY=3D can be omitted. @implied_key is + * implied then, and VALUE can't be empty or contain ',' or '=3D'. + * + * A parameter "help" or "?" without a value isn't added to the + * resulting dictionary, but instead is interpreted as help request. + * All other options are parsed and returned normally so that context + * specific help can be printed. + * + * If @p_help is not NULL, store whether help is requested there. + * If @p_help is NULL and help is requested, fail. + * + * On success, return a dictionary of the parsed keys and values. + * On failure, store an error through @errp and return NULL. + */ +QDict *keyval_parse(const char *params, const char *implied_key, + bool *p_help, Error **errp) +{ + QDict *qdict =3D qdict_new(); + QDict *ret =3D keyval_parse_into(qdict, params, implied_key, p_help, e= rrp); + + if (!ret) { + qobject_unref(qdict); + } + return ret; +} --=20 2.26.2