From 42613c97d5dd8581d8dfd2cbe443736f8c539973 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@exmulti.com>
Date: Tue, 4 Sep 2012 21:40:26 -0400
Subject: [PATCH] Add block file naming helper, BlockFilePath()

---
 src/main.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 38d2b96f8..9e2ebb932 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1991,11 +1991,17 @@ bool CheckDiskSpace(uint64 nAdditionalBytes)
     return true;
 }
 
+static filesystem::path BlockFilePath(unsigned int nFile)
+{
+    string strBlockFn = strprintf("blk%04d.dat", nFile);
+    return GetDataDir() / strBlockFn;
+}
+
 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
 {
     if ((nFile < 1) || (nFile == (unsigned int) -1))
         return NULL;
-    FILE* file = fopen((GetDataDir() / strprintf("blk%04d.dat", nFile)).string().c_str(), pszMode);
+    FILE* file = fopen(BlockFilePath(nFile).string().c_str(), pszMode);
     if (!file)
         return NULL;
     if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))