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//
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// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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//
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#include "build/build_config.h"

#ifdef OS_WIN
#include <windows.h>
#endif

#include <string>

#include "base/icu_util.h"

#include "base/logging.h"
#include "base/file_util.h"
#include "base/path_service.h"
#include "unicode/udata.h"

namespace icu_util {

bool Initialize() {
#ifdef OS_WIN
  // Assert that we are not called more than once.  Even though calling this
  // function isn't harmful (ICU can handle it), being called twice probably
  // indicates a programming error.
#ifndef NDEBUG
  static bool called_once = false;
  DCHECK(!called_once);
  called_once = true;
#endif

  // We expect to find the ICU data module alongside the current module.
  std::wstring data_path;
  PathService::Get(base::DIR_MODULE, &data_path);
  file_util::AppendToPath(&data_path, L"icudt38.dll");

  HMODULE module = LoadLibrary(data_path.c_str());
  if (!module)
    return false;

  FARPROC addr = GetProcAddress(module, "icudt38_dat");
  if (!addr)
    return false;

  UErrorCode err = U_ZERO_ERROR;
  udata_setCommonData(reinterpret_cast<void*>(addr), &err);
  return err == U_ZERO_ERROR;
#else
  // Windows ships ICU's data separate, so it needs to link the code to data
  // here. Other platforms don't need this.
  return true;
#endif  // OS_WIN
}

}  // namespace icu_util