f755dea79d
Our qapi visitor contract supports multiple integer visitors,
but left the type_uint64 visitor as optional (falling back on
type_int64); which in turn can lead to awkward behavior with
numbers larger than INT64_MAX (the user has to be aware of
twos complement, and deal with negatives).
This patch does not address the disparity in handling large
values as negatives. It merely moves the fallback from uint64
to int64 from the visitor core to the visitors, where the issue
can actually be fixed, by implementing the missing type_uint64()
callbacks on top of the respective type_int64() callbacks, and
with a FIXME comment explaining why that's wrong.
With that done, we now have a type_uint64() callback in every
driver, so we can make it mandatory from the core. And although
the type_int64() callback can cover the entire valid range of
type_uint{8,16,32} on valid user input, using type_uint64() to
avoid mixed signedness makes more sense.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1454075341-13658-15-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
74 lines
3.0 KiB
C
74 lines
3.0 KiB
C
/*
|
|
* Core Definitions for QAPI Visitor implementations
|
|
*
|
|
* Copyright (C) 2012 Red Hat, Inc.
|
|
*
|
|
* Author: Paolo Bonizni <pbonzini@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*
|
|
*/
|
|
#ifndef QAPI_VISITOR_IMPL_H
|
|
#define QAPI_VISITOR_IMPL_H
|
|
|
|
#include "qapi/error.h"
|
|
#include "qapi/visitor.h"
|
|
|
|
struct Visitor
|
|
{
|
|
/* Must be set */
|
|
void (*start_struct)(Visitor *v, void **obj, const char *kind,
|
|
const char *name, size_t size, Error **errp);
|
|
void (*end_struct)(Visitor *v, Error **errp);
|
|
|
|
void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
|
|
Error **errp);
|
|
void (*end_implicit_struct)(Visitor *v, Error **errp);
|
|
|
|
void (*start_list)(Visitor *v, const char *name, Error **errp);
|
|
GenericList *(*next_list)(Visitor *v, GenericList **list, Error **errp);
|
|
void (*end_list)(Visitor *v, Error **errp);
|
|
|
|
void (*type_enum)(Visitor *v, int *obj, const char * const strings[],
|
|
const char *kind, const char *name, Error **errp);
|
|
/* May be NULL; only needed for input visitors. */
|
|
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);
|
|
/* 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,
|
|
Error **errp);
|
|
void (*type_any)(Visitor *v, QObject **obj, const char *name,
|
|
Error **errp);
|
|
|
|
/* 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_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);
|
|
bool (*start_union)(Visitor *v, bool data_present, Error **errp);
|
|
};
|
|
|
|
void input_type_enum(Visitor *v, int *obj, const char * const strings[],
|
|
const char *kind, const char *name, Error **errp);
|
|
void output_type_enum(Visitor *v, int *obj, const char * const strings[],
|
|
const char *kind, const char *name, Error **errp);
|
|
|
|
#endif
|