#include "common.h"

#include <cstdarg>

#include <memory>

#include <cstring>

namespace TbApiImpl {

std::string string_format(const std::string fmt_str, ...) {

int final_n, n = ((int)fmt_str.size()) * 2; /* Reserve two times as much as the length of the fmt_str */

std::string str;

std::unique_ptr<char[]> formatted;

va_list ap;

while (1) {

formatted.reset(new char[n]); /* Wrap the plain char array into the unique_ptr */

strcpy(&formatted[0], fmt_str.c_str());

va_start(ap, fmt_str);

final_n = vsnprintf(&formatted[0], n, fmt_str.c_str(), ap);

va_end(ap);

if (final_n < 0 || final_n >= n)

n += abs(final_n - n + 1);

else

break;

}

return std::string(formatted.get());

}

} // namespace TbApiImpl