// Copyright (c) 2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <stdexcept>

#include <flatfile.h>
#include <tinyformat.h>

FlatFileSeq::FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size) :
    m_dir(std::move(dir)),
    m_prefix(prefix),
    m_chunk_size(chunk_size)
{
    if (chunk_size == 0) {
        throw std::invalid_argument("chunk_size must be positive");
    }
}

fs::path FlatFileSeq::FileName(const CDiskBlockPos& pos) const
{
    return m_dir / strprintf("%s%05u.dat", m_prefix, pos.nFile);
}