1 files changed, 88 insertions, 0 deletions
diff --git a/zen/xml_io.cpp b/zen/xml_io.cpp
new file mode 100644
index 00000000..4b9abc29
--- /dev/null
+++ b/zen/xml_io.cpp
@@ -0,0 +1,88 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved        *
+// **************************************************************************
+
+#include "xml_io.h"
+#include <zen/file_handling.h>
+#include <zen/file_io.h>
+#include <zen/serialize.h>
+
+using namespace zen;
+
+
+XmlDoc zen::loadXmlDocument(const Zstring& filename) //throw FileError
+{
+	//can't simply use zen::loadBinStream() due to the short-circuit xml-validation below!
+
+    std::string stream;
+
+    FileInput inputFile(filename); //throw FileError
+    {
+        //quick test whether input is an XML: avoid loading large binary files up front!
+        const std::string xmlBegin = "<?xml version=";
+        stream.resize(strLength(BYTE_ORDER_MARK_UTF8) + xmlBegin.size());
+
+        const size_t bytesRead = inputFile.read(&stream[0], stream.size()); //throw FileError
+        stream.resize(bytesRead);
+
+        if (!startsWith(stream, xmlBegin) &&
+            !startsWith(stream, BYTE_ORDER_MARK_UTF8 + xmlBegin)) //respect BOM!
+            throw FileError(replaceCpy(_("File %x does not contain a valid configuration."), L"%x", fmtFileName(filename)));
+    }
+
+    const size_t blockSize = 128 * 1024;
+    do
+    {
+        stream.resize(stream.size() + blockSize);
+
+        const size_t bytesRead = inputFile.read(&*stream.begin() + stream.size() - blockSize, blockSize); //throw FileError
+        if (bytesRead < blockSize)
+            stream.resize(stream.size() - (blockSize - bytesRead)); //caveat: unsigned arithmetics
+    }
+    while (!inputFile.eof());
+
+    try
+    {
+        return parse(stream); //throw XmlParsingError
+    }
+    catch (const XmlParsingError& e)
+    {
+        throw FileError(
+            replaceCpy(replaceCpy(replaceCpy(_("Error parsing file %x, row %y, column %z."),
+                                             L"%x", fmtFileName(filename)),
+                                  L"%y", numberTo<std::wstring>(e.row + 1)),
+                       L"%z", numberTo<std::wstring>(e.col + 1)));
+    }
+}
+
+
+void zen::saveXmlDocument(const XmlDoc& doc, const Zstring& filename) //throw FileError
+{
+    std::string stream = serialize(doc); //noexcept
+
+    try
+    {
+        if (getFilesize(filename) == stream.size()) //throw FileError
+			if (loadBinStream<std::string>(filename) == stream) //throw FileError
+                return;
+    }
+    catch (FileError&) {}
+
+    FileOutput outputFile(filename, FileOutput::ACC_OVERWRITE); //throw FileError
+    outputFile.write(stream.c_str(), stream.length());          //
+}
+
+
+void zen::checkForMappingErrors(const XmlIn& xmlInput, const Zstring& filename) //throw FileError
+{
+    if (xmlInput.errorsOccured())
+    {
+        std::wstring msg = _("Cannot read the following XML elements:") + L"\n";
+        for (const std::wstring& elem : xmlInput.getErrorsAs<std::wstring>())
+            msg += L"\n" + elem;
+
+        throw FileError(replaceCpy(_("Configuration file %x loaded partially only."), L"%x", fmtFileName(filename)) + L"\n\n" + msg);
+    }
+}