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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#ifndef UPB_REFLECTION_MESSAGE_H_
#define UPB_REFLECTION_MESSAGE_H_
#include <stddef.h>
#include "upb/mem/arena.h"
#include "upb/message/map.h"
#include "upb/message/message.h"
#include "upb/reflection/common.h"
// Must be last.
#include "upb/port/def.inc"
#ifdef __cplusplus
extern "C" {
#endif
// Returns a mutable pointer to a map, array, or submessage value. If the given
// arena is non-NULL this will construct a new object if it was not previously
// present. May not be called for primitive fields.
UPB_API upb_MutableMessageValue upb_Message_Mutable(upb_Message* msg,
const upb_FieldDef* f,
upb_Arena* a);
// Returns the field that is set in the oneof, or NULL if none are set.
UPB_API const upb_FieldDef* upb_Message_WhichOneofByDef(const upb_Message* msg,
const upb_OneofDef* o);
// Clear all data and unknown fields.
void upb_Message_ClearByDef(upb_Message* msg, const upb_MessageDef* m);
// Clears any field presence and sets the value back to its default.
UPB_API void upb_Message_ClearFieldByDef(upb_Message* msg,
const upb_FieldDef* f);
// May only be called for fields where upb_FieldDef_HasPresence(f) == true.
UPB_API bool upb_Message_HasFieldByDef(const upb_Message* msg,
const upb_FieldDef* f);
// Returns the value in the message associated with this field def.
UPB_API upb_MessageValue upb_Message_GetFieldByDef(const upb_Message* msg,
const upb_FieldDef* f);
// Sets the given field to the given value. For a msg/array/map/string, the
// caller must ensure that the target data outlives |msg| (by living either in
// the same arena or a different arena that outlives it).
//
// Returns false if allocation fails.
UPB_API bool upb_Message_SetFieldByDef(upb_Message* msg, const upb_FieldDef* f,
upb_MessageValue val, upb_Arena* a);
// Iterate over present fields.
//
// size_t iter = kUpb_Message_Begin;
// const upb_FieldDef *f;
// upb_MessageValue val;
// while (upb_Message_Next(msg, m, ext_pool, &f, &val, &iter)) {
// process_field(f, val);
// }
//
// If ext_pool is NULL, no extensions will be returned. If the given symtab
// returns extensions that don't match what is in this message, those extensions
// will be skipped.
#define kUpb_Message_Begin -1
UPB_API bool upb_Message_Next(const upb_Message* msg, const upb_MessageDef* m,
const upb_DefPool* ext_pool,
const upb_FieldDef** f, upb_MessageValue* val,
size_t* iter);
// Clears all unknown field data from this message and all submessages.
UPB_API bool upb_Message_DiscardUnknown(upb_Message* msg,
const upb_MessageDef* m, int maxdepth);
#ifdef __cplusplus
} /* extern "C" */
#endif
#include "upb/port/undef.inc"
#endif /* UPB_REFLECTION_MESSAGE_H_ */