Function Java_java_io_File_lastModified

classpath/java-io.cpp:562–621

}

extern "C" JNIEXPORT jlong JNICALL
    Java_java_io_File_lastModified(JNIEnv* e, jclass, jstring path)
{
  string_t chars = getChars(e, path);
  if (chars) {
#ifdef PLATFORM_WINDOWS
// Option: without opening file
// http://msdn.microsoft.com/en-us/library/windows/desktop/aa364946(v=vs.85).aspx
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
    HANDLE hFile = CreateFileW(
        chars, FILE_READ_DATA, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
#else
    HANDLE hFile = CreateFile2(
        chars, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr);
#endif
    releaseChars(e, path, chars);
    if (hFile == INVALID_HANDLE_VALUE)
      return 0;
    LARGE_INTEGER fileDate, filetimeToUnixEpochAdjustment;
    filetimeToUnixEpochAdjustment.QuadPart = 11644473600000L * 10000L;
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
    FILETIME fileLastWriteTime;
    if (!GetFileTime(hFile, 0, 0, &fileLastWriteTime)) {
      CloseHandle(hFile);
      return 0;
    }
    fileDate.HighPart = fileLastWriteTime.dwHighDateTime;
    fileDate.LowPart = fileLastWriteTime.dwLowDateTime;
#else
    FILE_BASIC_INFO fileInfo;
    if (!GetFileInformationByHandleEx(
            hFile, FileBasicInfo, &fileInfo, sizeof(fileInfo))) {
      CloseHandle(hFile);
      return 0;
    }
    fileDate = fileInfo.ChangeTime;
#endif
    CloseHandle(hFile);
    fileDate.QuadPart -= filetimeToUnixEpochAdjustment.QuadPart;
    return fileDate.QuadPart / 10000000L;
#else
    struct stat fileStat;
    int res = stat(chars, &fileStat);
    releaseChars(e, path, chars);

    if (res == -1) {
      return 0;
    }
#ifdef __APPLE__
#define MTIME st_mtimespec
#else
#define MTIME st_mtim
#endif
    return (static_cast<jlong>(fileStat.MTIME.tv_sec) * 1000)
           + (static_cast<jlong>(fileStat.MTIME.tv_nsec) / (1000 * 1000));
#endif
  }