string.cc

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#include "ion/port/string.h"

#if defined(ION_PLATFORM_WINDOWS)
#include <windows.h>
#endif

namespace ion {
namespace port {

#if defined(ION_PLATFORM_WINDOWS)
std::wstring Utf8ToWide(const std::string& utf8) {
  std::wstring wide;
  if (!utf8.empty()) {
    wide.resize(utf8.size());  // Worst case:  one wchar_t for each byte
    const int size =
        ::MultiByteToWideChar(CP_UTF8, 0,
                              &utf8[0], static_cast<int>(utf8.size()),
                              &wide[0], static_cast<int>(wide.size()));
    wide.resize(size);
  }
  return wide;
}

std::string WideToUtf8(const std::wstring& wide) {
  std::string utf8;
  if (!wide.empty()) {
    utf8.resize(4 * wide.size());  // Worst case:  4 bytes for each wchar_t
    const int size =
        ::WideCharToMultiByte(CP_UTF8, 0,
                              &wide[0], static_cast<int>(wide.size()),
                              &utf8[0], static_cast<int>(utf8.size()),
                              NULL, NULL);
    utf8.resize(size);
  }
  return utf8;
}
#endif

}  // namespace port
}  // namespace ion