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/*
* SPDX-License-Identifier: GPL-2.0-or-later
* SPDX-FileName: Blob.cpp
* SPDX-FileContributor: Dmitry Vedenko
*/
#include "Blob.h"
#include <algorithm>
#include <cassert>
#include <utility>
#include <sqlite3.h>
namespace audacity::sqlite
{
Blob::Blob(sqlite3_blob* blob) noexcept
: mBlob { blob }
{
assert(mBlob != nullptr);
}
Blob::~Blob() noexcept
{
if (mBlob != nullptr)
{
sqlite3_blob_close(mBlob);
mBlob = nullptr;
}
}
Blob::Blob(Blob&& rhs) noexcept
{
*this = std::move(rhs);
}
Blob& Blob::operator=(Blob&& rhs) noexcept
{
std::swap(mBlob, rhs.mBlob);
return *this;
}
int64_t Blob::Size() const noexcept
{
if (mBlob == nullptr)
return 0;
return sqlite3_blob_bytes(mBlob);
}
int64_t
Blob::Read(void* buffer, int64_t offset, int64_t bufferSize) const noexcept
{
if (mBlob == nullptr)
return 0;
const int readSize = std::min<int>(bufferSize, Size() - offset);
if (bufferSize <= 0)
return 0;
if (
SQLITE_OK !=
sqlite3_blob_read(mBlob, buffer, readSize, static_cast<int>(offset)))
return 0;
return readSize;
}
int64_t
Blob::Write(const void* buffer, int64_t offset, int64_t bufferSize) noexcept
{
if (mBlob == nullptr)
return 0;
const int writeSize = std::min<int>(bufferSize, Size() - offset);
if (bufferSize <= 0)
return 0;
if (
SQLITE_OK !=
sqlite3_blob_write(mBlob, buffer, writeSize, static_cast<int>(offset)))
return 0;
return writeSize;
}
} // namespace audacity::sqlite
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