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// **************************************************************************
// * 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 "file_handling.h"
#include "file_io.h"
#include "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)) //allow 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
//only update xml file if there are real changes
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);
}
}
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