1 files changed, 103 insertions, 0 deletions
diff --git a/lib/xml_base.cpp b/lib/xml_base.cpp
new file mode 100644
index 00000000..b4887dc0
--- /dev/null
+++ b/lib/xml_base.cpp
@@ -0,0 +1,103 @@
+// **************************************************************************
+// * 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) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#include "xml_base.h"
+#include <zen/file_handling.h>
+#include <zen/file_io.h>
+
+using namespace zen;
+
+
+//loadXmlDocument vs loadStream:
+//1. better error reporting
+//2. quick exit if (potentially large) input file is not an XML
+void xmlAccess::loadXmlDocument(const Zstring& filename, XmlDoc& doc) //throw FfsXmlError
+{
+    std::string stream;
+    try
+    {
+        {
+            //quick test whether input is an XML: avoid loading large binary files up front!
+            const std::string xmlBegin = "<?xml version=";
+            std::vector<char> buffer(xmlBegin.size() + sizeof(zen::BYTE_ORDER_MARK_UTF8));
+
+            FileInput inputFile(filename); //throw FileError;
+            const size_t bytesRead = inputFile.read(&buffer[0], buffer.size()); //throw FileError
+
+            const std::string fileBegin(&buffer[0], bytesRead);
+
+            if (!startsWith(fileBegin, xmlBegin) &&
+                !startsWith(fileBegin, zen::BYTE_ORDER_MARK_UTF8 + xmlBegin)) //respect BOM!
+                throw FfsXmlError(_("Error parsing configuration file:") + "\n\"" + filename + "\"");
+        }
+
+        const zen::UInt64 fs = zen::getFilesize(filename); //throw FileError
+        stream.resize(to<size_t>(fs));
+
+        FileInput inputFile(filename); //throw FileError
+        const size_t bytesRead = inputFile.read(&stream[0], stream.size()); //throw FileError
+        if (bytesRead < to<size_t>(fs))
+            throw FfsXmlError(_("Error reading file:") + "\n\"" + filename + "\"");
+    }
+    catch (const FileError& error)
+    {
+        if (!fileExists(filename))
+            throw FfsXmlError(_("File does not exist:") + "\n\"" + filename+ "\"");
+
+        throw FfsXmlError(error.msg());
+    }
+
+    try
+    {
+        zen::parse(stream, doc); //throw XmlParsingError
+    }
+    catch (const XmlParsingError&)
+    {
+        throw FfsXmlError(_("Error parsing configuration file:") + "\n\"" + filename + "\"");
+    }
+}
+
+
+const std::wstring xmlAccess::getErrorMessageFormatted(const XmlIn& in)
+{
+    std::wstring errorMessage = _("Could not read values for the following XML nodes:") + "\n";
+
+    std::vector<std::wstring> failedNodes = in.getErrorsAs<std::wstring>();
+    std::for_each(failedNodes.begin(), failedNodes.end(),
+    [&](const std::wstring& str) { errorMessage += str + L'\n'; });
+
+    return errorMessage;
+}
+
+
+void xmlAccess::saveXmlDocument(const zen::XmlDoc& doc, const Zstring& filename) //throw (FfsXmlError)
+{
+    std::string stream = serialize(doc); //throw ()
+
+    bool saveNecessary = true;
+    try
+    {
+        if (zen::getFilesize(filename) == stream.size()) //throw FileError
+            try
+            {
+                if (zen::loadStream(filename) == stream) //throw XmlFileError
+                    saveNecessary = false;
+            }
+            catch (const zen::XmlFileError&) {}
+    }
+    catch (FileError&) {}
+
+    if (saveNecessary)
+        try
+        {
+            FileOutput outputFile(filename, FileOutput::ACC_OVERWRITE); //throw FileError
+            outputFile.write(stream.c_str(), stream.length());                 //
+        }
+        catch (const FileError& error) //more detailed error messages than with wxWidgets
+        {
+            throw FfsXmlError(error.msg());
+        }
+}