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#include "base/environ.h"

#include <cstdlib>

#include "base/singleton.h"

namespace mozc {

namespace {
class EnvironImpl : public EnvironInterface {
 public:
  EnvironImpl() = default;
  ~EnvironImpl() override = default;

  const char *GetEnv(const char* env_var) override {
    return std::getenv(env_var);
  }
};

using EnvironSingleton = SingletonMockable<EnvironInterface, EnvironImpl>;
}  // namespace


const char *Environ::GetEnv(const char *env_var) {
  return EnvironSingleton::Get()->GetEnv(env_var);
}

void Environ::SetMockForUnitTest(EnvironInterface *mock) {
  EnvironSingleton::SetMock(mock);
}

}  // namespace mozc