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// ----------------------------------------------------------------------------
// Copyright (C) 2002-2006 Marcin Kalicinski
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// For more information, see www.boost.org
// ----------------------------------------------------------------------------
#ifndef BOOST_PROPERTY_TREE_DETAIL_XML_PARSER_UTILS_HPP_INCLUDED
#define BOOST_PROPERTY_TREE_DETAIL_XML_PARSER_UTILS_HPP_INCLUDED
#include <boost/property_tree/detail/ptree_utils.hpp>
#include <boost/property_tree/detail/xml_parser_error.hpp>
#include <boost/property_tree/detail/xml_parser_writer_settings.hpp>
#include <string>
#include <algorithm>
#include <locale>
namespace boost { namespace property_tree { namespace xml_parser
{
template<class Ch>
std::basic_string<Ch> condense(const std::basic_string<Ch> &s)
{
std::basic_string<Ch> r;
std::locale loc;
bool space = false;
typename std::basic_string<Ch>::const_iterator end = s.end();
for (typename std::basic_string<Ch>::const_iterator it = s.begin();
it != end; ++it)
{
if (isspace(*it, loc) || *it == Ch('\n'))
{
if (!space)
r += Ch(' '), space = true;
}
else
r += *it, space = false;
}
return r;
}
template<class Ch>
std::basic_string<Ch> encode_char_entities(const std::basic_string<Ch> &s)
{
// Don't do anything for empty strings.
if(s.empty()) return s;
typedef typename std::basic_string<Ch> Str;
Str r;
// To properly round-trip spaces and not uglify the XML beyond
// recognition, we have to encode them IF the text contains only spaces.
Str sp(1, Ch(' '));
if(s.find_first_not_of(sp) == Str::npos) {
// The first will suffice.
r = detail::widen<Ch>(" ");
r += Str(s.size() - 1, Ch(' '));
} else {
typename Str::const_iterator end = s.end();
for (typename Str::const_iterator it = s.begin(); it != end; ++it)
{
switch (*it)
{
case Ch('<'): r += detail::widen<Ch>("<"); break;
case Ch('>'): r += detail::widen<Ch>(">"); break;
case Ch('&'): r += detail::widen<Ch>("&"); break;
case Ch('"'): r += detail::widen<Ch>("""); break;
case Ch('\''): r += detail::widen<Ch>("'"); break;
default: r += *it; break;
}
}
}
return r;
}
template<class Ch>
std::basic_string<Ch> decode_char_entities(const std::basic_string<Ch> &s)
{
typedef typename std::basic_string<Ch> Str;
Str r;
typename Str::const_iterator end = s.end();
for (typename Str::const_iterator it = s.begin(); it != end; ++it)
{
if (*it == Ch('&'))
{
typename Str::const_iterator semicolon = std::find(it + 1, end, Ch(';'));
if (semicolon == end)
BOOST_PROPERTY_TREE_THROW(xml_parser_error("invalid character entity", "", 0));
Str ent(it + 1, semicolon);
if (ent == detail::widen<Ch>("lt")) r += Ch('<');
else if (ent == detail::widen<Ch>("gt")) r += Ch('>');
else if (ent == detail::widen<Ch>("amp")) r += Ch('&');
else if (ent == detail::widen<Ch>("quot")) r += Ch('"');
else if (ent == detail::widen<Ch>("apos")) r += Ch('\'');
else
BOOST_PROPERTY_TREE_THROW(xml_parser_error("invalid character entity", "", 0));
it = semicolon;
}
else
r += *it;
}
return r;
}
template<class Ch>
const std::basic_string<Ch> &xmldecl()
{
static std::basic_string<Ch> s = detail::widen<Ch>("<?xml>");
return s;
}
template<class Ch>
const std::basic_string<Ch> &xmlattr()
{
static std::basic_string<Ch> s = detail::widen<Ch>("<xmlattr>");
return s;
}
template<class Ch>
const std::basic_string<Ch> &xmlcomment()
{
static std::basic_string<Ch> s = detail::widen<Ch>("<xmlcomment>");
return s;
}
template<class Ch>
const std::basic_string<Ch> &xmltext()
{
static std::basic_string<Ch> s = detail::widen<Ch>("<xmltext>");
return s;
}
} } }
#endif
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