Add fs.cpp/h

Cherry-picked from: 19e36bb

src/Makefile.am

@@ -104,6 +104,7 @@ BITCOIN_CORE_H = \
   dogecoin.h \
   dogecoin-fees.cpp \
   dogecoin-fees.h \
+  fs.h \
   httprpc.h \
   httpserver.h \
   indirectmap.h \
@@ -352,6 +353,7 @@ libdogecoin_util_a_SOURCES = \
   compat/glibc_sanity.cpp \
   compat/glibcxx_sanity.cpp \
   compat/strnlen.cpp \
+  fs.cpp \
   random.cpp \
   rpc/protocol.cpp \
   support/cleanse.cpp \

src/fs.cpp

@@ -0,0 +1,21 @@
+// Copyright (c) 2017 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 "fs.h"
+
+#include <boost/filesystem.hpp>
+
+namespace fsbridge {
+
+FILE *fopen(const fs::path& p, const char *mode)
+{
+    return ::fopen(p.string().c_str(), mode);
+}
+
+FILE *freopen(const fs::path& p, const char *mode, FILE *stream)
+{
+    return ::freopen(p.string().c_str(), mode, stream);
+}
+
+} // fsbridge

src/fs.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2017 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_FS_H
+#define BITCOIN_FS_H
+
+#include <stdio.h>
+#include <string>
+
+#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/filesystem/detail/utf8_codecvt_facet.hpp>
+
+/** Filesystem operations and types */
+namespace fs = boost::filesystem;
+
+/** Bridge operations to C stdio */
+namespace fsbridge {
+    FILE *fopen(const fs::path& p, const char *mode);
+    FILE *freopen(const fs::path& p, const char *mode, FILE *stream);
+};
+
+#endif // BITCOIN_FS_H