From 9183d6ef656c8f3ed406821b99827f9b5f047665 Mon Sep 17 00:00:00 2001
From: Jim Posen <jim.posen@gmail.com>
Date: Sun, 6 Jan 2019 11:06:31 -0800
Subject: validation: Extract basic block file logic into FlatFileSeq class.

---
 src/flatfile.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/flatfile.cpp

(limited to 'src/flatfile.cpp')

diff --git a/src/flatfile.cpp b/src/flatfile.cpp
new file mode 100644
index 0000000000..c9ca9aa869
--- /dev/null
+++ b/src/flatfile.cpp
@@ -0,0 +1,23 @@
+// 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);
+}
-- 
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