Re: [Qemu-devel] [PATCH v6 03/23] qapi: Consolidate visitor integer callbacks

2015-11-27 Thread Markus Armbruster
Eric Blake  writes:

> Commit 4e27e819 introduced optional visitor callbacks for all
> sorts of int types, but except for type_uint64() and type_size(),
> none of them have ever been supplied (the generic implementation
> based on using type_[u]int64() then bounds-checking works just
> fine). In the interest of simplicity, it's easier to make the
> visitor callback interface not have to worry about the other
> sizes.
>
> Signed-off-by: Eric Blake 
> ---
> v6: split off from v5 23/46
> original version also appeared in v6-v9 of subset D
> ---
>  include/qapi/visitor-impl.h |  22 -
>  qapi/qapi-visit-core.c  | 117 
> ++--
>  2 files changed, 59 insertions(+), 80 deletions(-)
>
> diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
> index 70326e0..d071c06 100644
> --- a/include/qapi/visitor-impl.h
> +++ b/include/qapi/visitor-impl.h
> @@ -1,7 +1,7 @@
>  /*
>   * Core Definitions for QAPI Visitor implementations
>   *
> - * Copyright (C) 2012 Red Hat, Inc.
> + * Copyright (C) 2012, 2015 Red Hat, Inc.
>   *
>   * Author: Paolo Bonizni 
>   *
> @@ -36,6 +36,16 @@ struct Visitor
>  void (*get_next_type)(Visitor *v, QType *type, bool promote_int,
>const char *name, Error **errp);
>
> +/* Must be set. */
> +void (*type_int64)(Visitor *v, int64_t *obj, const char *name,
> +   Error **errp);
> +/* Must be set. */
> +void (*type_uint64)(Visitor *v, uint64_t *obj, const char *name,
> +Error **errp);
> +/* Only required to visit sizes differently than (*type_uint64)().  */

What about:

   /* Optional; fallback is type_uint64() */

> +void (*type_size)(Visitor *v, uint64_t *obj, const char *name,
> +  Error **errp);
> +/* Must be set. */
>  void (*type_bool)(Visitor *v, bool *obj, const char *name, Error **errp);
>  void (*type_str)(Visitor *v, char **obj, const char *name, Error **errp);
>  void (*type_number)(Visitor *v, double *obj, const char *name,
> @@ -46,16 +56,6 @@ struct Visitor
>  /* May be NULL; most useful for input visitors. */
>  void (*optional)(Visitor *v, bool *present, const char *name);
>
> -void (*type_uint8)(Visitor *v, uint8_t *obj, const char *name, Error 
> **errp);
> -void (*type_uint16)(Visitor *v, uint16_t *obj, const char *name, Error 
> **errp);
> -void (*type_uint32)(Visitor *v, uint32_t *obj, const char *name, Error 
> **errp);
> -void (*type_uint64)(Visitor *v, uint64_t *obj, const char *name, Error 
> **errp);
> -void (*type_int8)(Visitor *v, int8_t *obj, const char *name, Error 
> **errp);
> -void (*type_int16)(Visitor *v, int16_t *obj, const char *name, Error 
> **errp);
> -void (*type_int32)(Visitor *v, int32_t *obj, const char *name, Error 
> **errp);
> -void (*type_int64)(Visitor *v, int64_t *obj, const char *name, Error 
> **errp);
> -/* visit_type_size() falls back to (*type_uint64)() if type_size is 
> unset */
> -void (*type_size)(Visitor *v, uint64_t *obj, const char *name, Error 
> **errp);
>  bool (*start_union)(Visitor *v, bool data_present, Error **errp);
>  void (*end_union)(Visitor *v, bool data_present, Error **errp);
>  };
> diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
> index 88bed9c..be1fcdd 100644
> --- a/qapi/qapi-visit-core.c
> +++ b/qapi/qapi-visit-core.c
> @@ -104,57 +104,48 @@ void visit_type_uint8(Visitor *v, uint8_t *obj, const 
> char *name, Error **errp)
>  {
>  uint64_t value;
>
> -if (v->type_uint8) {
> -v->type_uint8(v, obj, name, errp);
> -} else {
> -value = *obj;
> -v->type_uint64(v, &value, name, errp);
> -if (value > UINT8_MAX) {
> -error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
> -   name ? name : "null", "uint8_t");
> -return;
> -}
> -*obj = value;
> +value = *obj;
> +v->type_uint64(v, &value, name, errp);
> +if (value > UINT8_MAX) {
> +error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
> +   name ? name : "null", "uint8_t");
> +return;
>  }
> +*obj = value;
>  }

Best reviewed with whitespace ignored.

Have you considered doing this before PATCH 02?  Hmm, swapping them now
is probably not worth the bother.

[...]



[Qemu-devel] [PATCH v6 03/23] qapi: Consolidate visitor integer callbacks

2015-11-25 Thread Eric Blake
Commit 4e27e819 introduced optional visitor callbacks for all
sorts of int types, but except for type_uint64() and type_size(),
none of them have ever been supplied (the generic implementation
based on using type_[u]int64() then bounds-checking works just
fine). In the interest of simplicity, it's easier to make the
visitor callback interface not have to worry about the other
sizes.

Signed-off-by: Eric Blake 

---
v6: split off from v5 23/46
original version also appeared in v6-v9 of subset D
---
 include/qapi/visitor-impl.h |  22 -
 qapi/qapi-visit-core.c  | 117 ++--
 2 files changed, 59 insertions(+), 80 deletions(-)

diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index 70326e0..d071c06 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -1,7 +1,7 @@
 /*
  * Core Definitions for QAPI Visitor implementations
  *
- * Copyright (C) 2012 Red Hat, Inc.
+ * Copyright (C) 2012, 2015 Red Hat, Inc.
  *
  * Author: Paolo Bonizni 
  *
@@ -36,6 +36,16 @@ struct Visitor
 void (*get_next_type)(Visitor *v, QType *type, bool promote_int,
   const char *name, Error **errp);

+/* Must be set. */
+void (*type_int64)(Visitor *v, int64_t *obj, const char *name,
+   Error **errp);
+/* Must be set. */
+void (*type_uint64)(Visitor *v, uint64_t *obj, const char *name,
+Error **errp);
+/* Only required to visit sizes differently than (*type_uint64)().  */
+void (*type_size)(Visitor *v, uint64_t *obj, const char *name,
+  Error **errp);
+/* Must be set. */
 void (*type_bool)(Visitor *v, bool *obj, const char *name, Error **errp);
 void (*type_str)(Visitor *v, char **obj, const char *name, Error **errp);
 void (*type_number)(Visitor *v, double *obj, const char *name,
@@ -46,16 +56,6 @@ struct Visitor
 /* May be NULL; most useful for input visitors. */
 void (*optional)(Visitor *v, bool *present, const char *name);

-void (*type_uint8)(Visitor *v, uint8_t *obj, const char *name, Error 
**errp);
-void (*type_uint16)(Visitor *v, uint16_t *obj, const char *name, Error 
**errp);
-void (*type_uint32)(Visitor *v, uint32_t *obj, const char *name, Error 
**errp);
-void (*type_uint64)(Visitor *v, uint64_t *obj, const char *name, Error 
**errp);
-void (*type_int8)(Visitor *v, int8_t *obj, const char *name, Error **errp);
-void (*type_int16)(Visitor *v, int16_t *obj, const char *name, Error 
**errp);
-void (*type_int32)(Visitor *v, int32_t *obj, const char *name, Error 
**errp);
-void (*type_int64)(Visitor *v, int64_t *obj, const char *name, Error 
**errp);
-/* visit_type_size() falls back to (*type_uint64)() if type_size is unset 
*/
-void (*type_size)(Visitor *v, uint64_t *obj, const char *name, Error 
**errp);
 bool (*start_union)(Visitor *v, bool data_present, Error **errp);
 void (*end_union)(Visitor *v, bool data_present, Error **errp);
 };
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 88bed9c..be1fcdd 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -104,57 +104,48 @@ void visit_type_uint8(Visitor *v, uint8_t *obj, const 
char *name, Error **errp)
 {
 uint64_t value;

-if (v->type_uint8) {
-v->type_uint8(v, obj, name, errp);
-} else {
-value = *obj;
-v->type_uint64(v, &value, name, errp);
-if (value > UINT8_MAX) {
-error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
-   name ? name : "null", "uint8_t");
-return;
-}
-*obj = value;
+value = *obj;
+v->type_uint64(v, &value, name, errp);
+if (value > UINT8_MAX) {
+error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+   name ? name : "null", "uint8_t");
+return;
 }
+*obj = value;
 }

-void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, Error 
**errp)
+void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name,
+   Error **errp)
 {
 uint64_t value;

-if (v->type_uint16) {
-v->type_uint16(v, obj, name, errp);
-} else {
-value = *obj;
-v->type_uint64(v, &value, name, errp);
-if (value > UINT16_MAX) {
-error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
-   name ? name : "null", "uint16_t");
-return;
-}
-*obj = value;
+value = *obj;
+v->type_uint64(v, &value, name, errp);
+if (value > UINT16_MAX) {
+error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+   name ? name : "null", "uint16_t");
+return;
 }
+*obj = value;
 }

-void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, Error 
**errp)
+void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name,
+   Error **errp)
 {
 uint64_t value;

-if (v