blob: d63c7d98d9595191106b2d0e44f4a3cc914f0601 [file] [log] [blame]
// 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
#include "google/protobuf/hpb/hpb.h"
#include <atomic>
#include <cstddef>
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/strings/str_format.h"
#include "absl/strings/string_view.h"
#include "google/protobuf/hpb/extension_lock.h"
#include "upb/mem/arena.h"
#include "upb/message/accessors.h"
#include "upb/message/copy.h"
#include "upb/message/message.h"
#include "upb/message/promote.h"
#include "upb/message/value.h"
#include "upb/mini_table/extension.h"
#include "upb/mini_table/extension_registry.h"
#include "upb/mini_table/message.h"
#include "upb/wire/decode.h"
#include "upb/wire/encode.h"
namespace protos {
// begin:google_only
absl::Status MessageAllocationError(SourceLocation loc) {
return absl::Status(absl::StatusCode::kInternal,
"Upb message allocation error", loc);
}
absl::Status ExtensionNotFoundError(int extension_number, SourceLocation loc) {
return absl::Status(
absl::StatusCode::kInternal,
absl::StrFormat("Extension %d not found", extension_number), loc);
}
absl::Status MessageEncodeError(upb_EncodeStatus status, SourceLocation loc) {
return absl::Status(absl::StatusCode::kInternal,
absl::StrFormat("Upb message encoding error %d", status),
loc
);
}
absl::Status MessageDecodeError(upb_DecodeStatus status, SourceLocation loc
) {
return absl::Status(absl::StatusCode::kInternal,
absl::StrFormat("Upb message parse error %d", status), loc
);
}
// end:google_only
// begin:github_only
// absl::Status MessageAllocationError(SourceLocation loc) {
// return absl::Status(absl::StatusCode::kUnknown,
// "Upb message allocation error");
// }
//
// absl::Status ExtensionNotFoundError(int ext_number, SourceLocation loc) {
// return absl::Status(absl::StatusCode::kUnknown,
// absl::StrFormat("Extension %d not found", ext_number));
// }
//
// absl::Status MessageEncodeError(upb_EncodeStatus s, SourceLocation loc) {
// return absl::Status(absl::StatusCode::kUnknown, "Encoding error");
// }
//
// absl::Status MessageDecodeError(upb_DecodeStatus status, SourceLocation loc
//
// ) {
// return absl::Status(absl::StatusCode::kUnknown, "Upb message parse error");
// }
// end:github_only
namespace internal {
using ::hpb::internal::upb_extension_locker_global;
using ::hpb::internal::UpbExtensionLocker;
using ::hpb::internal::UpbExtensionUnlocker;
upb_ExtensionRegistry* GetUpbExtensions(
const ExtensionRegistry& extension_registry) {
return extension_registry.registry_;
}
/**
* MessageLock(msg) acquires lock on msg when constructed and releases it when
* destroyed.
*/
class MessageLock {
public:
explicit MessageLock(const upb_Message* msg) : msg_(msg) {
UpbExtensionLocker locker =
upb_extension_locker_global.load(std::memory_order_acquire);
unlocker_ = (locker != nullptr) ? locker(msg) : nullptr;
}
MessageLock(const MessageLock&) = delete;
void operator=(const MessageLock&) = delete;
~MessageLock() {
if (unlocker_ != nullptr) {
unlocker_(msg_);
}
}
private:
const upb_Message* msg_;
UpbExtensionUnlocker unlocker_;
};
bool HasExtensionOrUnknown(const upb_Message* msg,
const upb_MiniTableExtension* eid) {
MessageLock msg_lock(msg);
if (upb_Message_HasExtension(msg, eid)) return true;
const int number = upb_MiniTableExtension_Number(eid);
return upb_Message_FindUnknown(msg, number, 0).status == kUpb_FindUnknown_Ok;
}
bool GetOrPromoteExtension(upb_Message* msg, const upb_MiniTableExtension* eid,
upb_Arena* arena, upb_MessageValue* value) {
MessageLock msg_lock(msg);
upb_GetExtension_Status ext_status = upb_Message_GetOrPromoteExtension(
(upb_Message*)msg, eid, 0, arena, value);
return ext_status == kUpb_GetExtension_Ok;
}
absl::StatusOr<absl::string_view> Serialize(const upb_Message* message,
const upb_MiniTable* mini_table,
upb_Arena* arena, int options) {
MessageLock msg_lock(message);
size_t len;
char* ptr;
upb_EncodeStatus status =
upb_Encode(message, mini_table, options, arena, &ptr, &len);
if (status == kUpb_EncodeStatus_Ok) {
return absl::string_view(ptr, len);
}
return MessageEncodeError(status);
}
void DeepCopy(upb_Message* target, const upb_Message* source,
const upb_MiniTable* mini_table, upb_Arena* arena) {
MessageLock msg_lock(source);
upb_Message_DeepCopy(target, source, mini_table, arena);
}
upb_Message* DeepClone(const upb_Message* source,
const upb_MiniTable* mini_table, upb_Arena* arena) {
MessageLock msg_lock(source);
return upb_Message_DeepClone(source, mini_table, arena);
}
absl::Status MoveExtension(upb_Message* message, upb_Arena* message_arena,
const upb_MiniTableExtension* ext,
upb_Message* extension, upb_Arena* extension_arena) {
if (message_arena != extension_arena &&
// Try fuse, if fusing is not allowed or fails, create copy of extension.
!upb_Arena_Fuse(message_arena, extension_arena)) {
extension = DeepClone(extension, upb_MiniTableExtension_GetSubMessage(ext),
message_arena);
}
return upb_Message_SetExtension(message, ext, &extension, message_arena)
? absl::OkStatus()
: MessageAllocationError();
}
absl::Status SetExtension(upb_Message* message, upb_Arena* message_arena,
const upb_MiniTableExtension* ext,
const upb_Message* extension) {
// Clone extension into target message arena.
extension = DeepClone(extension, upb_MiniTableExtension_GetSubMessage(ext),
message_arena);
return upb_Message_SetExtension(message, ext, &extension, message_arena)
? absl::OkStatus()
: MessageAllocationError();
}
} // namespace internal
} // namespace protos