Rearrange sources (#4997)

src/libxrpl/basics/FileUtilities.cpp

@@ -0,0 +1,91 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2018 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <ripple/basics/FileUtilities.h>
+
+namespace ripple {
+
+std::string
+getFileContents(
+    boost::system::error_code& ec,
+    boost::filesystem::path const& sourcePath,
+    std::optional<std::size_t> maxSize)
+{
+    using namespace boost::filesystem;
+    using namespace boost::system::errc;
+
+    path fullPath{canonical(sourcePath, ec)};
+    if (ec)
+        return {};
+
+    if (maxSize && (file_size(fullPath, ec) > *maxSize || ec))
+    {
+        if (!ec)
+            ec = make_error_code(file_too_large);
+        return {};
+    }
+
+    ifstream fileStream(fullPath, std::ios::in);
+
+    if (!fileStream)
+    {
+        ec = make_error_code(static_cast<errc_t>(errno));
+        return {};
+    }
+
+    const std::string result{
+        std::istreambuf_iterator<char>{fileStream},
+        std::istreambuf_iterator<char>{}};
+
+    if (fileStream.bad())
+    {
+        ec = make_error_code(static_cast<errc_t>(errno));
+        return {};
+    }
+
+    return result;
+}
+
+void
+writeFileContents(
+    boost::system::error_code& ec,
+    boost::filesystem::path const& destPath,
+    std::string const& contents)
+{
+    using namespace boost::filesystem;
+    using namespace boost::system::errc;
+
+    ofstream fileStream(destPath, std::ios::out | std::ios::trunc);
+
+    if (!fileStream)
+    {
+        ec = make_error_code(static_cast<errc_t>(errno));
+        return;
+    }
+
+    fileStream << contents;
+
+    if (fileStream.bad())
+    {
+        ec = make_error_code(static_cast<errc_t>(errno));
+        return;
+    }
+}
+
+}  // namespace ripple