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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google LLC nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "protos/protos.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 "protos/protos_extension_lock.h"
#include "upb/mem/arena.h"
#include "upb/message/copy.h"
#include "upb/message/internal/extension.h"
#include "upb/message/promote.h"
#include "upb/message/types.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 {
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);
return _upb_Message_Getext(msg, eid) != nullptr ||
upb_MiniTable_FindUnknown(msg, eid->field.number, 0).status ==
kUpb_FindUnknown_Ok;
}
const upb_Message_Extension* GetOrPromoteExtension(
upb_Message* msg, const upb_MiniTableExtension* eid, upb_Arena* arena) {
MessageLock msg_lock(msg);
const upb_Message_Extension* ext = _upb_Message_Getext(msg, eid);
if (ext == nullptr) {
upb_GetExtension_Status ext_status = upb_MiniTable_GetOrPromoteExtension(
(upb_Message*)msg, eid, 0, arena, &ext);
if (ext_status != kUpb_GetExtension_Ok) {
ext = nullptr;
}
}
return ext;
}
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) {
upb_Message_Extension* msg_ext =
_upb_Message_GetOrCreateExtension(message, ext, message_arena);
if (!msg_ext) {
return MessageAllocationError();
}
if (message_arena != extension_arena) {
// Try fuse, if fusing is not allowed or fails, create copy of extension.
if (!upb_Arena_Fuse(message_arena, extension_arena)) {
msg_ext->data.ptr =
DeepClone(extension, msg_ext->ext->sub.submsg, message_arena);
return absl::OkStatus();
}
}
msg_ext->data.ptr = extension;
return absl::OkStatus();
}
absl::Status SetExtension(upb_Message* message, upb_Arena* message_arena,
const upb_MiniTableExtension* ext,
const upb_Message* extension) {
upb_Message_Extension* msg_ext =
_upb_Message_GetOrCreateExtension(message, ext, message_arena);
if (!msg_ext) {
return MessageAllocationError();
}
// Clone extension into target message arena.
msg_ext->data.ptr =
DeepClone(extension, msg_ext->ext->sub.submsg, message_arena);
return absl::OkStatus();
}
} // namespace internal
} // namespace protos
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