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-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: - 2021:f47dda2c58- 2020:fa0074e2d8- 2019:aaaaad6ac9
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <stdexcept>
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#include <flatfile.h>
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#include <logging.h>
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#include <tinyformat.h>
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#include <util/system.h>
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FlatFileSeq::FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size) :
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m_dir(std::move(dir)),
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m_prefix(prefix),
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m_chunk_size(chunk_size)
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{
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if (chunk_size == 0) {
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throw std::invalid_argument("chunk_size must be positive");
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}
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}
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std::string FlatFilePos::ToString() const
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{
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return strprintf("FlatFilePos(nFile=%i, nPos=%i)", nFile, nPos);
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}
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fs::path FlatFileSeq::FileName(const FlatFilePos& pos) const
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{
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return m_dir / fs::u8path(strprintf("%s%05u.dat", m_prefix, pos.nFile));
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}
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FILE* FlatFileSeq::Open(const FlatFilePos& pos, bool read_only)
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{
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if (pos.IsNull()) {
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return nullptr;
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}
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fs::path path = FileName(pos);
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fs::create_directories(path.parent_path());
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FILE* file = fsbridge::fopen(path, read_only ? "rb": "rb+");
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if (!file && !read_only)
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file = fsbridge::fopen(path, "wb+");
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if (!file) {
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LogPrintf("Unable to open file %s\n", fs::PathToString(path));
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return nullptr;
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}
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if (pos.nPos && fseek(file, pos.nPos, SEEK_SET)) {
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LogPrintf("Unable to seek to position %u of %s\n", pos.nPos, fs::PathToString(path));
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fclose(file);
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return nullptr;
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}
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return file;
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}
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size_t FlatFileSeq::Allocate(const FlatFilePos& pos, size_t add_size, bool& out_of_space)
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{
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out_of_space = false;
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unsigned int n_old_chunks = (pos.nPos + m_chunk_size - 1) / m_chunk_size;
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unsigned int n_new_chunks = (pos.nPos + add_size + m_chunk_size - 1) / m_chunk_size;
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if (n_new_chunks > n_old_chunks) {
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size_t old_size = pos.nPos;
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size_t new_size = n_new_chunks * m_chunk_size;
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size_t inc_size = new_size - old_size;
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if (CheckDiskSpace(m_dir, inc_size)) {
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FILE *file = Open(pos);
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if (file) {
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LogPrint(BCLog::VALIDATION, "Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile);
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AllocateFileRange(file, pos.nPos, inc_size);
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fclose(file);
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return inc_size;
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}
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} else {
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out_of_space = true;
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}
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}
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return 0;
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}
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bool FlatFileSeq::Flush(const FlatFilePos& pos, bool finalize)
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{
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FILE* file = Open(FlatFilePos(pos.nFile, 0)); // Avoid fseek to nPos
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if (!file) {
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return error("%s: failed to open file %d", __func__, pos.nFile);
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}
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if (finalize && !TruncateFile(file, pos.nPos)) {
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fclose(file);
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return error("%s: failed to truncate file %d", __func__, pos.nFile);
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}
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if (!FileCommit(file)) {
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fclose(file);
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return error("%s: failed to commit file %d", __func__, pos.nFile);
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}
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DirectoryCommit(m_dir);
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fclose(file);
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return true;
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}
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