/*
* Core Definitions for QAPI Visitor Classes
*
+ * Copyright (C) 2012-2016 Red Hat, Inc.
* Copyright IBM, Corp. 2011
*
* Authors:
#ifndef QAPI_VISITOR_CORE_H
#define QAPI_VISITOR_CORE_H
-#include "qemu/typedefs.h"
#include "qapi/qmp/qobject.h"
-#include "qapi/error.h"
-#include <stdlib.h>
-typedef struct GenericList
-{
- union {
- void *value;
- uint64_t padding;
- };
+/* This struct is layout-compatible with all other *List structs
+ * created by the qapi generator. It is used as a typical
+ * singly-linked list. */
+typedef struct GenericList {
struct GenericList *next;
+ char padding[];
} GenericList;
-void visit_start_handle(Visitor *v, void **obj, const char *kind,
- const char *name, Error **errp);
-void visit_end_handle(Visitor *v, Error **errp);
-void visit_start_struct(Visitor *v, void **obj, const char *kind,
- const char *name, size_t size, Error **errp);
+/* This struct is layout-compatible with all Alternate types
+ * created by the qapi generator. */
+typedef struct GenericAlternate {
+ QType type;
+ char padding[];
+} GenericAlternate;
+
+void visit_start_struct(Visitor *v, const char *name, void **obj,
+ size_t size, Error **errp);
void visit_end_struct(Visitor *v, Error **errp);
-void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
- Error **errp);
-void visit_end_implicit_struct(Visitor *v, Error **errp);
+
void visit_start_list(Visitor *v, const char *name, Error **errp);
-GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp);
-void visit_end_list(Visitor *v, Error **errp);
-void visit_optional(Visitor *v, bool *present, const char *name,
- Error **errp);
-void visit_get_next_type(Visitor *v, int *obj, const int *qtypes,
- const char *name, Error **errp);
-void visit_type_enum(Visitor *v, int *obj, const char * const strings[],
- const char *kind, const char *name, Error **errp);
-void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp);
-void visit_type_uint8(Visitor *v, uint8_t *obj, const char *name, Error **errp);
-void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, Error **errp);
-void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, Error **errp);
-void visit_type_uint64(Visitor *v, uint64_t *obj, const char *name, Error **errp);
-void visit_type_int8(Visitor *v, int8_t *obj, const char *name, Error **errp);
-void visit_type_int16(Visitor *v, int16_t *obj, const char *name, Error **errp);
-void visit_type_int32(Visitor *v, int32_t *obj, const char *name, Error **errp);
-void visit_type_int64(Visitor *v, int64_t *obj, const char *name, Error **errp);
-void visit_type_size(Visitor *v, uint64_t *obj, const char *name, Error **errp);
-void visit_type_bool(Visitor *v, bool *obj, const char *name, Error **errp);
-void visit_type_str(Visitor *v, char **obj, const char *name, Error **errp);
-void visit_type_number(Visitor *v, double *obj, const char *name, Error **errp);
-bool visit_start_union(Visitor *v, bool data_present, Error **errp);
-void visit_end_union(Visitor *v, bool data_present, Error **errp);
+GenericList *visit_next_list(Visitor *v, GenericList **list, size_t size);
+void visit_end_list(Visitor *v);
+
+/*
+ * Start the visit of an alternate @obj with the given @size.
+ *
+ * @name specifies the relationship to the containing struct (ignored
+ * for a top level visit, the name of the key if this alternate is
+ * part of an object, or NULL if this alternate is part of a list).
+ *
+ * @obj must not be NULL. Input visitors will allocate @obj and
+ * determine the qtype of the next thing to be visited, stored in
+ * (*@obj)->type. Other visitors will leave @obj unchanged.
+ *
+ * If @promote_int, treat integers as QTYPE_FLOAT.
+ *
+ * If successful, this must be paired with visit_end_alternate(), even
+ * if visiting the contents of the alternate fails.
+ */
+void visit_start_alternate(Visitor *v, const char *name,
+ GenericAlternate **obj, size_t size,
+ bool promote_int, Error **errp);
+
+/*
+ * Finish visiting an alternate type.
+ *
+ * Must be called after a successful visit_start_alternate(), even if
+ * an error occurred in the meantime.
+ *
+ * TODO: Should all the visit_end_* interfaces take obj parameter, so
+ * that dealloc visitor need not track what was passed in visit_start?
+ */
+void visit_end_alternate(Visitor *v);
+
+/**
+ * Check if an optional member @name of an object needs visiting.
+ * For input visitors, set *@present according to whether the
+ * corresponding visit_type_*() needs calling; for other visitors,
+ * leave *@present unchanged. Return *@present for convenience.
+ */
+bool visit_optional(Visitor *v, const char *name, bool *present);
+
+void visit_type_enum(Visitor *v, const char *name, int *obj,
+ const char *const strings[], Error **errp);
+void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp);
+void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
+ Error **errp);
+void visit_type_uint16(Visitor *v, const char *name, uint16_t *obj,
+ Error **errp);
+void visit_type_uint32(Visitor *v, const char *name, uint32_t *obj,
+ Error **errp);
+void visit_type_uint64(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp);
+void visit_type_int8(Visitor *v, const char *name, int8_t *obj, Error **errp);
+void visit_type_int16(Visitor *v, const char *name, int16_t *obj,
+ Error **errp);
+void visit_type_int32(Visitor *v, const char *name, int32_t *obj,
+ Error **errp);
+void visit_type_int64(Visitor *v, const char *name, int64_t *obj,
+ Error **errp);
+void visit_type_size(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp);
+void visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp);
+void visit_type_str(Visitor *v, const char *name, char **obj, Error **errp);
+void visit_type_number(Visitor *v, const char *name, double *obj,
+ Error **errp);
+void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp);
#endif
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