C++ GetFileAttributesExW函数代码示例

//------------------------------------------------------------------------------
int hooked_stat(const char* path, struct hooked_stat* out)
{
    int ret = -1;
    WIN32_FILE_ATTRIBUTE_DATA fad;
    wchar_t buf[2048];
    size_t characters;

    // Utf8 to wchars.
    characters = MultiByteToWideChar(
        CP_UTF8, 0,
        path, -1,
        buf, sizeof_array(buf)
    );

    characters = characters ? characters : sizeof_array(buf) - 1;
    buf[characters] = L'\0';

    // Get properties.
    out->st_size = 0;
    out->st_mode = 0;
    if (GetFileAttributesExW(buf, GetFileExInfoStandard, &fad) != 0)
    {
        unsigned dir_bit;

        dir_bit = (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? _S_IFDIR : 0;

        out->st_size = fad.nFileSizeLow;
        out->st_mode |= dir_bit;
        ret = 0;
    }
    else
        errno = ENOENT;

    return ret;
}

int64_t
omrfile_length(struct OMRPortLibrary *portLibrary, const char *path)
{
	int64_t result = -1;
	wchar_t unicodeBuffer[UNICODE_BUFFER_SIZE], *unicodePath;

	Trc_PRT_file_length_Entry(path);

	/* Convert the filename from UTF8 to Unicode */
	unicodePath = file_get_unicode_path(portLibrary, path, unicodeBuffer, UNICODE_BUFFER_SIZE);
	if (NULL != unicodePath) {
		WIN32_FILE_ATTRIBUTE_DATA myStat;
		if (0 == GetFileAttributesExW(unicodePath, GetFileExInfoStandard, &myStat)) {
			int32_t error = GetLastError();
			result = portLibrary->error_set_last_error(portLibrary, error, findError(error));
		} else {
			result = ((int64_t)myStat.nFileSizeHigh) << 32;
			result += (int64_t)myStat.nFileSizeLow;
		}

		if (unicodeBuffer != unicodePath) {
			portLibrary->mem_free_memory(portLibrary, unicodePath);
		}
	}

	Trc_PRT_file_length_Exit(result);
	return result;
}

/******************************************************************************
 *        FileMoniker_GetTimeOfLastChange
 ******************************************************************************/
static HRESULT WINAPI
FileMonikerImpl_GetTimeOfLastChange(IMoniker* iface, IBindCtx* pbc,
                                    IMoniker* pmkToLeft, FILETIME* pFileTime)
{
    FileMonikerImpl *This = impl_from_IMoniker(iface);
    IRunningObjectTable* rot;
    HRESULT res;
    WIN32_FILE_ATTRIBUTE_DATA info;

    TRACE("(%p,%p,%p,%p)\n",iface,pbc,pmkToLeft,pFileTime);

    if (pFileTime==NULL)
        return E_POINTER;

    if (pmkToLeft!=NULL)
        return E_INVALIDARG;

    res=IBindCtx_GetRunningObjectTable(pbc,&rot);

    if (FAILED(res))
        return res;

    res= IRunningObjectTable_GetTimeOfLastChange(rot,iface,pFileTime);

    if (FAILED(res)){ /* the moniker is not registered */

        if (!GetFileAttributesExW(This->filePathName,GetFileExInfoStandard,&info))
            return MK_E_NOOBJECT;

        *pFileTime=info.ftLastWriteTime;
    }

    return S_OK;
}

bool fs::stat(const std::string& path, stat_t& info)
{
	g_tls_error = fse::ok;

#ifdef _WIN32
	WIN32_FILE_ATTRIBUTE_DATA attrs;
	if (!GetFileAttributesExW(to_wchar(path).get(), GetFileExInfoStandard, &attrs))
	{
		return false;
	}

	info.is_directory = (attrs.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
	info.is_writable = (attrs.dwFileAttributes & FILE_ATTRIBUTE_READONLY) == 0;
	info.size = (u64)attrs.nFileSizeLow | ((u64)attrs.nFileSizeHigh << 32);
	info.atime = to_time_t(attrs.ftLastAccessTime);
	info.mtime = to_time_t(attrs.ftLastWriteTime);
	info.ctime = to_time_t(attrs.ftCreationTime);
#else
	struct stat file_info;
	if (stat(path.c_str(), &file_info) < 0)
	{
		return false;
	}

	info.is_directory = S_ISDIR(file_info.st_mode);
	info.is_writable = file_info.st_mode & 0200; // HACK: approximation
	info.size = file_info.st_size;
	info.atime = file_info.st_atime;
	info.mtime = file_info.st_mtime;
	info.ctime = file_info.st_ctime;
#endif

	return true;
}

// Changes the mode of a file.  The only supported mode bit is _S_IWRITE, which
// controls the user write (read-only) attribute of the file.  Returns zero if
// successful; returns -1 and sets errno and _doserrno on failure.
extern "C" int __cdecl _wchmod(wchar_t const* const path, int const mode)
{
    _VALIDATE_CLEAR_OSSERR_RETURN(path != nullptr, EINVAL, -1);

    WIN32_FILE_ATTRIBUTE_DATA attributes;
    if (!GetFileAttributesExW(path, GetFileExInfoStandard, &attributes))
    {
        __acrt_errno_map_os_error(GetLastError());
        return -1;
    }

    // Set or clear the read-only flag:
    if (mode & _S_IWRITE)
    {
        attributes.dwFileAttributes &= ~FILE_ATTRIBUTE_READONLY;
    }
    else
    {
        attributes.dwFileAttributes |= FILE_ATTRIBUTE_READONLY;
    }

    if (!SetFileAttributesW(path, attributes.dwFileAttributes))
    {
        __acrt_errno_map_os_error(GetLastError());
        return -1;
    }

    return 0;
}

JNIEXPORT void JNICALL
Java_net_rubygrapefruit_platform_internal_jni_WindowsFileFunctions_stat(JNIEnv *env, jclass target, jstring path, jobject dest, jobject result) {
    jclass destClass = env->GetObjectClass(dest);
    jmethodID mid = env->GetMethodID(destClass, "details", "(IJJ)V");
    if (mid == NULL) {
        mark_failed_with_message(env, "could not find method", result);
        return;
    }

    WIN32_FILE_ATTRIBUTE_DATA attr;
    wchar_t* pathStr = java_to_wchar(env, path, result);
    BOOL ok = GetFileAttributesExW(pathStr, GetFileExInfoStandard, &attr);
    free(pathStr);
    if (!ok) {
        DWORD error = GetLastError();
        if (error == ERROR_FILE_NOT_FOUND || error == ERROR_PATH_NOT_FOUND || error == ERROR_NOT_READY) {
            // Treat device with no media as missing
            env->CallVoidMethod(dest, mid, (jint)FILE_TYPE_MISSING, (jlong)0, (jlong)0);
            return;
        }
        mark_failed_with_errno(env, "could not file attributes", result);
        return;
    }
    jlong lastModified = lastModifiedNanos(&attr.ftLastWriteTime);
    if (attr.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
        env->CallVoidMethod(dest, mid, (jint)FILE_TYPE_DIRECTORY, (jlong)0, lastModified);
    } else {
        jlong size = ((jlong)attr.nFileSizeHigh << 32) | attr.nFileSizeLow;
        env->CallVoidMethod(dest, mid, (jint)FILE_TYPE_FILE, size, lastModified);
    }
}

/*
 * The CRT of Windows has a number of flaws wrt. its stat() implementation:
 * - time stamps are restricted to second resolution
 * - file modification times suffer from forth-and-back conversions between
 *    UTC and local time
 * Therefore, we implement our own stat, based on the Win32 API directly.
 *
 * This is based on the Python 2 implementation from:
 * https://github.com/python/cpython/commit/14694662d530d0d1823e1d86f2e5b2e4ec600e86#diff-a6f29e907cbb5fffd44d453bcd7b77d5R741
 */
static int
win32_wstat(const wchar_t* path, struct meterp_stat *result)
{
	int code;
	const wchar_t *dot;
	WIN32_FILE_ATTRIBUTE_DATA info;
	if (!GetFileAttributesExW(path, GetFileExInfoStandard, &info)) {
		if (GetLastError() != ERROR_SHARING_VIOLATION) {
			return -1;
		}
		else {
			if (!attributes_from_dir_w(path, &info)) {
				return -1;
			}
		}
	}
	code = attribute_data_to_stat(&info, result);
	if (code < 0) {
		return code;
	}
	/* Set IFEXEC if it is an .exe, .bat, ... */
	dot = wcsrchr(path, '.');
	if (dot) {
		if (_wcsicmp(dot, L".bat") == 0 ||
			_wcsicmp(dot, L".cmd") == 0 ||
			_wcsicmp(dot, L".exe") == 0 ||
			_wcsicmp(dot, L".com") == 0)
			result->st_mode |= 0111;
	}
	return code;
}

int64_t
omrfile_lastmod(struct OMRPortLibrary *portLibrary, const char *path)
{
	int64_t result = -1;
	wchar_t unicodeBuffer[UNICODE_BUFFER_SIZE], *unicodePath;

	Trc_PRT_file_lastmod_Entry(path);

	/* Convert the filename from UTF8 to Unicode */
	unicodePath = file_get_unicode_path(portLibrary, path, unicodeBuffer, UNICODE_BUFFER_SIZE);
	if (NULL != unicodePath) {
		WIN32_FILE_ATTRIBUTE_DATA myStat;
		if (0 == GetFileAttributesExW(unicodePath, GetFileExInfoStandard, &myStat)) {
			int32_t error = GetLastError();
			result = portLibrary->error_set_last_error(portLibrary, error, findError(error));
		} else {
			/*
			 * Search MSDN for 'Converting a time_t Value to a File Time' for following implementation.
			 */
			result = ((int64_t) myStat.ftLastWriteTime.dwHighDateTime << 32) | (int64_t) myStat.ftLastWriteTime.dwLowDateTime;
			result = (result - 116444736000000000) / 10000;
		}

		if (unicodeBuffer != unicodePath) {
			portLibrary->mem_free_memory(portLibrary, unicodePath);
		}
	}

	Trc_PRT_file_lastmod_Exit(result);
	return result;
}

static bool _EbrIsDir(const wchar_t* path) {
    WIN32_FILE_ATTRIBUTE_DATA fileAttribData;
    if (GetFileAttributesExW(path, GetFileExInfoStandard, &fileAttribData)) {
        if ((fileAttribData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)
            return true;
    }
    return false;
}

bool tr_sys_path_get_info(char const* path, int flags, tr_sys_path_info* info, tr_error** error)
{
    TR_ASSERT(path != NULL);
    TR_ASSERT(info != NULL);

    bool ret = false;
    wchar_t* wide_path = path_to_native_path(path);

    if ((flags & TR_SYS_PATH_NO_FOLLOW) == 0)
    {
        HANDLE handle = INVALID_HANDLE_VALUE;

        if (wide_path != NULL)
        {
            handle = CreateFileW(wide_path, 0, 0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
        }

        if (handle != INVALID_HANDLE_VALUE)
        {
            tr_error* my_error = NULL;
            ret = tr_sys_file_get_info(handle, info, &my_error);

            if (!ret)
            {
                tr_error_propagate(error, &my_error);
            }

            CloseHandle(handle);
        }
        else
        {
            set_system_error(error, GetLastError());
        }
    }
    else
    {
        WIN32_FILE_ATTRIBUTE_DATA attributes;

        if (wide_path != NULL)
        {
            ret = GetFileAttributesExW(wide_path, GetFileExInfoStandard, &attributes);
        }

        if (ret)
        {
            stat_to_sys_path_info(attributes.dwFileAttributes, attributes.nFileSizeLow, attributes.nFileSizeHigh,
                &attributes.ftLastWriteTime, info);
        }
        else
        {
            set_system_error(error, GetLastError());
        }
    }

    tr_free(wide_path);

    return ret;
}

static int doPlatformExists(LPWSTR wpath)
{
	WIN32_FILE_ATTRIBUTE_DATA a;

	// Returns non-zero if successful
	BOOL retval = GetFileAttributesExW(wpath, GetFileExInfoStandard, &a);

	return(retval);
} /* doPlatformExists */

long DVLib::GetFileSize(const std::wstring& filename)
{
    WIN32_FILE_ATTRIBUTE_DATA attr = { 0 };
	CHECK_WIN32_BOOL(GetFileAttributesExW(filename.c_str(), GetFileExInfoStandard, & attr),
        L"Error getting file attributes of " << filename);
    CHECK_BOOL(0 == attr.nFileSizeHigh,
        L"File " << filename << L" is > 2GB (" << attr.nFileSizeHigh << ")");
    return (long) attr.nFileSizeLow; 
}

 DWORD WINAPI_DECL GetFileAttributesW(
     _In_  LPCWSTR lpFileName
     )
 {
     WIN32_FILE_ATTRIBUTE_DATA fileInformation;
     BOOL b = GetFileAttributesExW(
         lpFileName, 
         GetFileExInfoStandard, 
         &fileInformation);
     return b ? fileInformation.dwFileAttributes : INVALID_FILE_ATTRIBUTES;
 }

        void WinNode::stat_impl(NodeStat& dst)
        {
            WIN32_FILE_ATTRIBUTE_DATA attrs = { 0 };
            GetFileAttributesExW(m_nativePath.c_str(), GetFileExInfoStandard, &attrs);

            filetimeToUint64(dst.ctime, attrs.ftCreationTime);
            filetimeToUint64(dst.mtime, attrs.ftLastWriteTime);
            filetimeToUint64(dst.atime, attrs.ftLastAccessTime);

            dst.id = m_id;
            dst.size = ((uint64)attrs.nFileSizeHigh << 32) | attrs.nFileSizeLow;
        }

ticks_t Platform::getFileModificationTime(std::string file)
{
    boost::replace_all(file, "/", "\\");
    std::wstring wfile = stdext::utf8_to_utf16(file);
    WIN32_FILE_ATTRIBUTE_DATA fileAttrData;
    memset(&fileAttrData, 0, sizeof(fileAttrData));
    GetFileAttributesExW(wfile.c_str(), GetFileExInfoStandard, &fileAttrData);
    ULARGE_INTEGER uli;
    uli.LowPart  = fileAttrData.ftLastWriteTime.dwLowDateTime;
    uli.HighPart = fileAttrData.ftLastWriteTime.dwHighDateTime;
    return uli.QuadPart;
}