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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sql/streaming_blob_handle.h"
#include <stdint.h>
#include <utility>
#include "base/check.h"
#include "base/containers/span.h"
#include "base/functional/callback.h"
#include "base/numerics/safe_conversions.h"
#include "base/types/pass_key.h"
#include "sql/sqlite_result_code.h"
#include "third_party/sqlite/sqlite3.h"
namespace sql {
StreamingBlobHandle::StreamingBlobHandle(
base::PassKey<sql::Database>,
sqlite3_blob* blob,
base::OnceCallback<void(SqliteResultCode, const char*)> done_callback)
: blob_handle_(blob), done_callback_(std::move(done_callback)) {
CHECK(blob);
CHECK(done_callback_);
}
StreamingBlobHandle::~StreamingBlobHandle() {
if (blob_handle_) {
int result = sqlite3_blob_close(blob_handle_.ExtractAsDangling());
std::move(done_callback_)
.Run(ToSqliteResultCode(result), "-- sqlite3_blob_close()");
}
}
StreamingBlobHandle::StreamingBlobHandle(StreamingBlobHandle&& other)
: blob_handle_(std::exchange(other.blob_handle_, nullptr)),
done_callback_(std::move(other.done_callback_)) {}
bool StreamingBlobHandle::Read(int offset, base::span<uint8_t> into) {
CHECK(blob_handle_);
int result = sqlite3_blob_read(blob_handle_, into.data(),
base::checked_cast<int>(into.size()), offset);
if (result != SQLITE_OK) [[unlikely]] {
sqlite3_blob_close(blob_handle_.ExtractAsDangling());
std::move(done_callback_)
.Run(ToSqliteResultCode(result), "-- sqlite3_blob_read()");
// `this` could be deleted.
return false;
}
return true;
}
bool StreamingBlobHandle::Write(int offset, base::span<const uint8_t> from) {
CHECK(blob_handle_);
int result = sqlite3_blob_write(blob_handle_, from.data(),
base::checked_cast<int>(from.size()), offset);
if (result != SQLITE_OK) [[unlikely]] {
sqlite3_blob_close(blob_handle_.ExtractAsDangling());
std::move(done_callback_)
.Run(ToSqliteResultCode(result), "-- sqlite3_blob_write()");
// `this` could be deleted.
return false;
}
return true;
}
} // namespace sql
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