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conversions_string.cpp
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164 lines (144 loc) · 3.86 KB
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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2025 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
// mapnik
#include <mapnik/util/conversions.hpp>
#include <mapnik/value/types.hpp>
#include <algorithm>
#include <cstring>
// karma is used by default
#define MAPNIK_KARMA_TO_STRING
#include <mapnik/warning.hpp>
MAPNIK_DISABLE_WARNING_PUSH
#include <mapnik/warning_ignore.hpp>
#ifdef MAPNIK_KARMA_TO_STRING
#include <boost/spirit/include/karma.hpp>
#endif
MAPNIK_DISABLE_WARNING_POP
#if _MSC_VER
#define snprintf _snprintf
#endif
namespace mapnik {
namespace util {
using namespace boost::spirit;
// double conversion - here we use sprintf over karma to work
// around https://github.com/mapnik/mapnik/issues/1741
bool to_string(std::string& s, double val)
{
s.resize(s.capacity());
while (true)
{
size_t n2 = static_cast<size_t>(snprintf(&s[0], s.size() + 1, "%g", val));
if (n2 <= s.size())
{
s.resize(n2);
break;
}
s.resize(n2);
}
return true;
}
#ifdef MAPNIK_KARMA_TO_STRING
bool to_string(std::string& str, int value)
{
namespace karma = boost::spirit::karma;
std::back_insert_iterator<std::string> sink(str);
return karma::generate(sink, value);
}
#ifdef BIGINT
bool to_string(std::string& str, mapnik::value_integer value)
{
namespace karma = boost::spirit::karma;
std::back_insert_iterator<std::string> sink(str);
return karma::generate(sink, value);
}
#endif
bool to_string(std::string& str, unsigned value)
{
namespace karma = boost::spirit::karma;
std::back_insert_iterator<std::string> sink(str);
return karma::generate(sink, value);
}
bool to_string(std::string& str, bool value)
{
namespace karma = boost::spirit::karma;
std::back_insert_iterator<std::string> sink(str);
return karma::generate(sink, value);
}
#else
bool to_string(std::string& s, int val)
{
s.resize(s.capacity());
while (true)
{
size_t n2 = static_cast<size_t>(snprintf(&s[0], s.size() + 1, "%d", val));
if (n2 <= s.size())
{
s.resize(n2);
break;
}
s.resize(n2);
}
return true;
}
#ifdef BIGINT
bool to_string(std::string& s, mapnik::value_integer val)
{
s.resize(s.capacity());
while (true)
{
size_t n2 = static_cast<size_t>(snprintf(&s[0], s.size() + 1, "%lld", val));
if (n2 <= s.size())
{
s.resize(n2);
break;
}
s.resize(n2);
}
return true;
}
#endif
bool to_string(std::string& s, unsigned val)
{
s.resize(s.capacity());
while (true)
{
size_t n2 = static_cast<size_t>(snprintf(&s[0], s.size() + 1, "%u", val));
if (n2 <= s.size())
{
s.resize(n2);
break;
}
s.resize(n2);
}
return true;
}
bool to_string(std::string& s, bool val)
{
if (val)
s = "true";
else
s = "false";
return true;
}
#endif
} // end namespace util
} // namespace mapnik