Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.1 KiB
63 lines
2.1 KiB
// 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_MESSAGE_INTERNAL_EXTENSION_H_ |
|
#define UPB_MESSAGE_INTERNAL_EXTENSION_H_ |
|
|
|
#include "upb/base/descriptor_constants.h" |
|
#include "upb/base/string_view.h" |
|
#include "upb/mem/arena.h" |
|
#include "upb/message/message.h" |
|
#include "upb/mini_table/extension.h" |
|
|
|
// Must be last. |
|
#include "upb/port/def.inc" |
|
|
|
// The internal representation of an extension is self-describing: it contains |
|
// enough information that we can serialize it to binary format without needing |
|
// to look it up in a upb_ExtensionRegistry. |
|
// |
|
// This representation allocates 16 bytes to data on 64-bit platforms. |
|
// This is rather wasteful for scalars (in the extreme case of bool, |
|
// it wastes 15 bytes). We accept this because we expect messages to be |
|
// the most common extension type. |
|
typedef struct { |
|
const upb_MiniTableExtension* ext; |
|
union { |
|
upb_StringView str; |
|
void* ptr; |
|
char scalar_data[8]; |
|
} data; |
|
} upb_Message_Extension; |
|
|
|
#ifdef __cplusplus |
|
extern "C" { |
|
#endif |
|
|
|
// Adds the given extension data to the given message. |
|
// |ext| is copied into the message instance. |
|
// This logically replaces any previously-added extension with this number. |
|
upb_Message_Extension* _upb_Message_GetOrCreateExtension( |
|
upb_Message* msg, const upb_MiniTableExtension* ext, upb_Arena* arena); |
|
|
|
// Returns an array of extensions for this message. |
|
// Note: the array is ordered in reverse relative to the order of creation. |
|
const upb_Message_Extension* _upb_Message_Getexts(const upb_Message* msg, |
|
size_t* count); |
|
|
|
// Returns an extension for the given field number, or NULL if no extension |
|
// exists for this field number. |
|
const upb_Message_Extension* _upb_Message_Getext( |
|
const upb_Message* msg, const upb_MiniTableExtension* ext); |
|
|
|
#ifdef __cplusplus |
|
} /* extern "C" */ |
|
#endif |
|
|
|
#include "upb/port/undef.inc" |
|
|
|
#endif /* UPB_MESSAGE_INTERNAL_EXTENSION_H_ */
|
|
|