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Tsirkin" , Marcel Apfelbaum , Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_Goa?= =?utf-8?q?ter?= , Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Sriram Yagnaraman , Jason Wang , Keith Busch , Klaus Jensen , Markus Armbruster Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, Akihiko Odaki X-Mailer: b4 0.14-dev-fd6e3 Received-SPF: none client-ip=2607:f8b0:4864:20::32e; envelope-from=akihiko.odaki@daynix.com; helo=mail-ot1-x32e.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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 visit_type_str_preserving() is mostly indentical with visit_type_str() but leaves the value intact. This is useful when the caller may interpret the value with a different type. Signed-off-by: Akihiko Odaki --- include/qapi/visitor-impl.h | 3 ++- include/qapi/visitor.h | 20 ++++++++++++++++++++ qapi/opts-visitor.c | 7 +++++-- qapi/qapi-clone-visitor.c | 2 +- qapi/qapi-dealloc-visitor.c | 4 ++-- qapi/qapi-forward-visitor.c | 4 +++- qapi/qapi-visit-core.c | 17 +++++++++++++++-- qapi/qobject-input-visitor.c | 23 ++++++++++++----------- qapi/qobject-output-visitor.c | 2 +- qapi/string-input-visitor.c | 2 +- qapi/string-output-visitor.c | 2 +- 11 files changed, 63 insertions(+), 23 deletions(-) diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h index 2badec5ba460..7b61f55995b5 100644 --- a/include/qapi/visitor-impl.h +++ b/include/qapi/visitor-impl.h @@ -95,7 +95,8 @@ struct Visitor bool (*type_bool)(Visitor *v, const char *name, bool *obj, Error **errp); /* Must be set */ - bool (*type_str)(Visitor *v, const char *name, char **obj, Error **errp); + bool (*type_str)(Visitor *v, const char *name, char **obj, bool consume, + Error **errp); /* Must be set to visit numbers */ bool (*type_number)(Visitor *v, const char *name, double *obj, diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h index 27b85d4700f2..b3ae3188edfb 100644 --- a/include/qapi/visitor.h +++ b/include/qapi/visitor.h @@ -654,6 +654,26 @@ bool visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp); */ bool visit_type_str(Visitor *v, const char *name, char **obj, Error **errp); +/* + * Visit a string value but do not consume it. + * + * @name expresses the relationship of this string to its parent + * container; see the general description of @name above. + * + * @obj must be non-NULL. Input and clone visitors set *@obj to the + * value (always using "" rather than NULL for an empty string). + * Other visitors leave *@obj unchanged, and commonly treat NULL like + * "". + * + * This function must be called only with an input visitor. + * + * This is mostly identical with visit_type_str() but leaves the value intact. + * This is useful when the caller may interpret the value with a different + * type. + */ +bool visit_type_str_preserving(Visitor *v, const char *name, char **obj, + Error **errp); + /* * Visit a number (i.e. double) value. * diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c index 3d1a28b41918..e9fad756e189 100644 --- a/qapi/opts-visitor.c +++ b/qapi/opts-visitor.c @@ -347,7 +347,8 @@ processed(OptsVisitor *ov, const char *name) static bool -opts_type_str(Visitor *v, const char *name, char **obj, Error **errp) +opts_type_str(Visitor *v, const char *name, char **obj, bool consume, + Error **errp) { OptsVisitor *ov = to_ov(v); const QemuOpt *opt; @@ -363,7 +364,9 @@ opts_type_str(Visitor *v, const char *name, char **obj, Error **errp) * valid enum value; this is harmless because tracking what gets * consumed only matters to visit_end_struct() as the final error * check if there were no other failures during the visit. */ - processed(ov, name); + if (consume) { + processed(ov, name); + } return true; } diff --git a/qapi/qapi-clone-visitor.c b/qapi/qapi-clone-visitor.c index bbf953698f38..90e6641835a7 100644 --- a/qapi/qapi-clone-visitor.c +++ b/qapi/qapi-clone-visitor.c @@ -108,7 +108,7 @@ static bool qapi_clone_type_bool(Visitor *v, const char *name, bool *obj, } static bool qapi_clone_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { QapiCloneVisitor *qcv = to_qcv(v); diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c index ef283f296601..6b0f957047d5 100644 --- a/qapi/qapi-dealloc-visitor.c +++ b/qapi/qapi-dealloc-visitor.c @@ -62,9 +62,9 @@ static void qapi_dealloc_end_list(Visitor *v, void **obj) } static bool qapi_dealloc_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { - if (obj) { + if (obj && consume) { g_free(*obj); } return true; diff --git a/qapi/qapi-forward-visitor.c b/qapi/qapi-forward-visitor.c index e36d9bc9ba7e..891282e0c3b3 100644 --- a/qapi/qapi-forward-visitor.c +++ b/qapi/qapi-forward-visitor.c @@ -180,6 +180,7 @@ static bool forward_field_type_bool(Visitor *v, const char *name, bool *obj, } static bool forward_field_type_str(Visitor *v, const char *name, char **obj, + bool consume, Error **errp) { ForwardFieldVisitor *ffv = to_ffv(v); @@ -187,7 +188,8 @@ static bool forward_field_type_str(Visitor *v, const char *name, char **obj, if (!forward_field_translate_name(ffv, &name, errp)) { return false; } - return visit_type_str(ffv->target, name, obj, errp); + return (consume ? visit_type_str : visit_type_str_preserving)( + ffv->target, name, obj, errp); } static bool forward_field_type_size(Visitor *v, const char *name, uint64_t *obj, diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c index 6c13510a2bc7..89b52fc99202 100644 --- a/qapi/qapi-visit-core.c +++ b/qapi/qapi-visit-core.c @@ -336,7 +336,8 @@ bool visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp) return v->type_bool(v, name, obj, errp); } -bool visit_type_str(Visitor *v, const char *name, char **obj, Error **errp) +static bool visit_type_str_common(Visitor *v, const char *name, char **obj, + bool consume, Error **errp) { bool ok; @@ -346,13 +347,25 @@ bool visit_type_str(Visitor *v, const char *name, char **obj, Error **errp) assert(!(v->type & VISITOR_OUTPUT) || *obj); */ trace_visit_type_str(v, name, obj); - ok = v->type_str(v, name, obj, errp); + ok = v->type_str(v, name, obj, consume, errp); if (v->type & VISITOR_INPUT) { assert(ok != !*obj); } return ok; } +bool visit_type_str(Visitor *v, const char *name, char **obj, Error **errp) +{ + return visit_type_str_common(v, name, obj, true, errp); +} + +bool visit_type_str_preserving(Visitor *v, const char *name, char **obj, + Error **errp) +{ + assert(v->type & VISITOR_INPUT); + return visit_type_str_common(v, name, obj, false, errp); +} + bool visit_type_number(Visitor *v, const char *name, double *obj, Error **errp) { diff --git a/qapi/qobject-input-visitor.c b/qapi/qobject-input-visitor.c index f110a804b2ae..facbbf01bd27 100644 --- a/qapi/qobject-input-visitor.c +++ b/qapi/qobject-input-visitor.c @@ -174,13 +174,13 @@ static QObject *qobject_input_get_object(QObjectInputVisitor *qiv, } static const char *qobject_input_get_keyval(QObjectInputVisitor *qiv, - const char *name, + const char *name, bool consume, Error **errp) { QObject *qobj; QString *qstr; - qobj = qobject_input_get_object(qiv, name, true, errp); + qobj = qobject_input_get_object(qiv, name, consume, errp); if (!qobj) { return NULL; } @@ -416,7 +416,7 @@ static bool qobject_input_type_int64_keyval(Visitor *v, const char *name, int64_t *obj, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, true, errp); if (!str) { return false; @@ -467,7 +467,7 @@ static bool qobject_input_type_uint64_keyval(Visitor *v, const char *name, uint64_t *obj, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, true, errp); if (!str) { return false; @@ -507,7 +507,7 @@ static bool qobject_input_type_bool_keyval(Visitor *v, const char *name, bool *obj, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, true, errp); if (!str) { return false; @@ -522,10 +522,10 @@ static bool qobject_input_type_bool_keyval(Visitor *v, const char *name, } static bool qobject_input_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - QObject *qobj = qobject_input_get_object(qiv, name, true, errp); + QObject *qobj = qobject_input_get_object(qiv, name, consume, errp); QString *qstr; *obj = NULL; @@ -544,10 +544,11 @@ static bool qobject_input_type_str(Visitor *v, const char *name, char **obj, } static bool qobject_input_type_str_keyval(Visitor *v, const char *name, - char **obj, Error **errp) + char **obj, bool consume, + Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, consume, errp); *obj = g_strdup(str); return !!str; @@ -578,7 +579,7 @@ static bool qobject_input_type_number_keyval(Visitor *v, const char *name, double *obj, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, true, errp); double val; if (!str) { @@ -635,7 +636,7 @@ static bool qobject_input_type_size_keyval(Visitor *v, const char *name, uint64_t *obj, Error **errp) { QObjectInputVisitor *qiv = to_qiv(v); - const char *str = qobject_input_get_keyval(qiv, name, errp); + const char *str = qobject_input_get_keyval(qiv, name, true, errp); if (!str) { return false; diff --git a/qapi/qobject-output-visitor.c b/qapi/qobject-output-visitor.c index 74770edd73c6..36a9fc245b79 100644 --- a/qapi/qobject-output-visitor.c +++ b/qapi/qobject-output-visitor.c @@ -173,7 +173,7 @@ static bool qobject_output_type_bool(Visitor *v, const char *name, bool *obj, } static bool qobject_output_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { QObjectOutputVisitor *qov = to_qov(v); if (*obj) { diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c index 3f1b9e9b4137..6562bbe3cfd4 100644 --- a/qapi/string-input-visitor.c +++ b/qapi/string-input-visitor.c @@ -336,7 +336,7 @@ static bool parse_type_bool(Visitor *v, const char *name, bool *obj, } static bool parse_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { StringInputVisitor *siv = to_siv(v); diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c index 5115536b1539..9a8cca0d5c68 100644 --- a/qapi/string-output-visitor.c +++ b/qapi/string-output-visitor.c @@ -269,7 +269,7 @@ static bool print_type_bool(Visitor *v, const char *name, bool *obj, } static bool print_type_str(Visitor *v, const char *name, char **obj, - Error **errp) + bool consume, Error **errp) { StringOutputVisitor *sov = to_sov(v); char *out;