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// Copyright (c) Meta Platforms, Inc. and affiliates.
//
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "rocksdb/utilities/types_util.h"
#include "db/dbformat.h"
namespace ROCKSDB_NAMESPACE {
Status GetInternalKeyForSeek(const Slice& user_key,
const Comparator* comparator, std::string* buf) {
if (!comparator) {
return Status::InvalidArgument(
"Constructing an internal key requires user key comparator.");
}
size_t ts_sz = comparator->timestamp_size();
Slice max_ts = comparator->GetMaxTimestamp();
if (ts_sz != max_ts.size()) {
return Status::InvalidArgument(
"The maximum timestamp returned by Comparator::GetMaxTimestamp is "
"invalid.");
}
buf->reserve(user_key.size() + ts_sz + kNumInternalBytes);
buf->assign(user_key.data(), user_key.size());
if (ts_sz) {
buf->append(max_ts.data(), max_ts.size());
}
PutFixed64(buf, PackSequenceAndType(kMaxSequenceNumber, kValueTypeForSeek));
return Status::OK();
}
Status GetInternalKeyForSeekForPrev(const Slice& user_key,
const Comparator* comparator,
std::string* buf) {
if (!comparator) {
return Status::InvalidArgument(
"Constructing an internal key requires user key comparator.");
}
size_t ts_sz = comparator->timestamp_size();
Slice min_ts = comparator->GetMinTimestamp();
if (ts_sz != min_ts.size()) {
return Status::InvalidArgument(
"The minimum timestamp returned by Comparator::GetMinTimestamp is "
"invalid.");
}
buf->reserve(user_key.size() + ts_sz + kNumInternalBytes);
buf->assign(user_key.data(), user_key.size());
if (ts_sz) {
buf->append(min_ts.data(), min_ts.size());
}
PutFixed64(buf, PackSequenceAndType(0, kValueTypeForSeekForPrev));
return Status::OK();
}
Status ParseEntry(const Slice& internal_key, const Comparator* comparator,
ParsedEntryInfo* parsed_entry) {
if (internal_key.size() < kNumInternalBytes) {
return Status::InvalidArgument("Internal key size invalid.");
}
if (!comparator) {
return Status::InvalidArgument(
"Parsing an internal key requires user key comparator.");
}
ParsedInternalKey pikey;
Status status = ParseInternalKey(internal_key, &pikey, /*log_err_key=*/false);
if (!status.ok()) {
return status;
}
size_t ts_sz = comparator->timestamp_size();
if (pikey.user_key.size() < ts_sz) {
return Status::InvalidArgument("User key(with timestamp) size invalid.");
}
if (ts_sz == 0) {
parsed_entry->user_key = pikey.user_key;
} else {
parsed_entry->user_key = StripTimestampFromUserKey(pikey.user_key, ts_sz);
parsed_entry->timestamp =
ExtractTimestampFromUserKey(pikey.user_key, ts_sz);
}
parsed_entry->sequence = pikey.sequence;
parsed_entry->type = ROCKSDB_NAMESPACE::GetEntryType(pikey.type);
return Status::OK();
}
} // namespace ROCKSDB_NAMESPACE
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