include/qapi/visitor-impl.h

   1 /*
   2  * Core Definitions for QAPI Visitor implementations
   3  *
   4  * Copyright (C) 2012-2016 Red Hat, Inc.
   5  *
   6  * Author: Paolo Bonizni <pbonzini@redhat.com>
   7  *
   8  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   9  * See the COPYING.LIB file in the top-level directory.
  10  *
  11  */
  12 #ifndef QAPI_VISITOR_IMPL_H
  13 #define QAPI_VISITOR_IMPL_H
  14
  15 #include "qapi/error.h"
  16 #include "qapi/visitor.h"
  17
  18 struct Visitor
  19 {
  20     /* Must be set */
  21     void (*start_struct)(Visitor *v, const char *name, void **obj,
  22                          size_t size, Error **errp);
  23     void (*end_struct)(Visitor *v, Error **errp);
  24
  25     void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
  26                                   Error **errp);
  27     /* May be NULL */
  28     void (*end_implicit_struct)(Visitor *v);
  29
  30     void (*start_list)(Visitor *v, const char *name, Error **errp);
  31     /* Must be set */
  32     GenericList *(*next_list)(Visitor *v, GenericList **list);
  33     /* Must be set */
  34     void (*end_list)(Visitor *v);
  35
  36     void (*type_enum)(Visitor *v, const char *name, int *obj,
  37                       const char *const strings[], Error **errp);
  38     /* May be NULL; only needed for input visitors. */
  39     void (*get_next_type)(Visitor *v, const char *name, QType *type,
  40                           bool promote_int, Error **errp);
  41
  42     /* Must be set. */
  43     void (*type_int64)(Visitor *v, const char *name, int64_t *obj,
  44                        Error **errp);
  45     /* Must be set. */
  46     void (*type_uint64)(Visitor *v, const char *name, uint64_t *obj,
  47                         Error **errp);
  48     /* Optional; fallback is type_uint64().  */
  49     void (*type_size)(Visitor *v, const char *name, uint64_t *obj,
  50                       Error **errp);
  51     /* Must be set. */
  52     void (*type_bool)(Visitor *v, const char *name, bool *obj, Error **errp);
  53     void (*type_str)(Visitor *v, const char *name, char **obj, Error **errp);
  54     void (*type_number)(Visitor *v, const char *name, double *obj,
  55                         Error **errp);
  56     void (*type_any)(Visitor *v, const char *name, QObject **obj,
  57                      Error **errp);
  58
  59     /* May be NULL; most useful for input visitors. */
  60     void (*optional)(Visitor *v, const char *name, bool *present);
  61
  62     bool (*start_union)(Visitor *v, bool data_present, Error **errp);
  63 };
  64
  65 void input_type_enum(Visitor *v, const char *name, int *obj,
  66                      const char *const strings[], Error **errp);
  67 void output_type_enum(Visitor *v, const char *name, int *obj,
  68                       const char *const strings[], Error **errp);
  69
  70 #endif