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#include <mbgl/platform/platform.hpp>
#define NU_WITH_TOUPPER
#define NU_WITH_TOLOWER
#define NU_WITH_UTF8_WRITER
#include <libnu/libnu.h>
#include <cstring>
#include <sstream>
namespace mbgl { namespace platform {
std::string uppercase(const std::string& str)
{
std::stringstream output;
char const *itr = str.c_str(), *nitr;
char const *end = itr + str.length();
char lo[5] = { 0 };
for (; itr < end; itr = nitr)
{
uint32_t code_point = 0;
char const* buf = nullptr;
nitr = _nu_toupper(itr, end, nu_utf8_read, &code_point, &buf, nullptr);
if (buf != nullptr)
{
do
{
buf = NU_CASEMAP_DECODING_FUNCTION(buf, &code_point);
if (code_point == 0) break;
output.write(lo, nu_utf8_write(code_point, lo) - lo);
}
while (code_point != 0);
}
else
{
output.write(itr, nitr - itr);
}
}
return output.str();
}
std::string lowercase(const std::string& str)
{
std::stringstream output;
char const *itr = str.c_str(), *nitr;
char const *end = itr + str.length();
char lo[5] = { 0 };
for (; itr < end; itr = nitr)
{
uint32_t code_point = 0;
char const* buf = nullptr;
nitr = _nu_tolower(itr, end, nu_utf8_read, &code_point, &buf, nullptr);
if (buf != nullptr)
{
do
{
buf = NU_CASEMAP_DECODING_FUNCTION(buf, &code_point);
if (code_point == 0) break;
output.write(lo, nu_utf8_write(code_point, lo) - lo);
}
while (code_point != 0);
}
else
{
output.write(itr, nitr - itr);
}
}
return output.str();
}
} // namespace platform
} // namespace mbgl
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