/
os_mswin.c
3103 lines (2689 loc) · 70.2 KB
/
os_mswin.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* os_mswin.c
*
* Routines for Win32.
*/
#include "vim.h"
#include <sys/types.h>
#include <signal.h>
#include <limits.h>
#ifndef PROTO
# include <process.h>
#endif
#undef chdir
#ifdef __GNUC__
# ifndef __MINGW32__
# include <dirent.h>
# endif
#else
# include <direct.h>
#endif
#ifndef PROTO
# if defined(FEAT_TITLE) && !defined(FEAT_GUI_MSWIN)
# include <shellapi.h>
# endif
# if defined(FEAT_PRINTER) && !defined(FEAT_POSTSCRIPT)
# include <dlgs.h>
# include <winspool.h>
# include <commdlg.h>
# endif
#endif /* PROTO */
#ifdef __MINGW32__
# ifndef FROM_LEFT_1ST_BUTTON_PRESSED
# define FROM_LEFT_1ST_BUTTON_PRESSED 0x0001
# endif
# ifndef RIGHTMOST_BUTTON_PRESSED
# define RIGHTMOST_BUTTON_PRESSED 0x0002
# endif
# ifndef FROM_LEFT_2ND_BUTTON_PRESSED
# define FROM_LEFT_2ND_BUTTON_PRESSED 0x0004
# endif
# ifndef FROM_LEFT_3RD_BUTTON_PRESSED
# define FROM_LEFT_3RD_BUTTON_PRESSED 0x0008
# endif
# ifndef FROM_LEFT_4TH_BUTTON_PRESSED
# define FROM_LEFT_4TH_BUTTON_PRESSED 0x0010
# endif
/*
* EventFlags
*/
# ifndef MOUSE_MOVED
# define MOUSE_MOVED 0x0001
# endif
# ifndef DOUBLE_CLICK
# define DOUBLE_CLICK 0x0002
# endif
#endif
/*
* When generating prototypes for Win32 on Unix, these lines make the syntax
* errors disappear. They do not need to be correct.
*/
#ifdef PROTO
#define WINAPI
#define WINBASEAPI
typedef int BOOL;
typedef int CALLBACK;
typedef int COLORREF;
typedef int CONSOLE_CURSOR_INFO;
typedef int COORD;
typedef int DWORD;
typedef int ENUMLOGFONTW;
typedef int HANDLE;
typedef int HDC;
typedef int HFONT;
typedef int HICON;
typedef int HWND;
typedef int INPUT_RECORD;
typedef int KEY_EVENT_RECORD;
typedef int LOGFONTW;
typedef int LPARAM;
typedef int LPBOOL;
typedef int LPCSTR;
typedef int LPCWSTR;
typedef int LPDWORD;
typedef int LPSTR;
typedef int LPTSTR;
typedef int LPVOID;
typedef int LPWSTR;
typedef int LRESULT;
typedef int MOUSE_EVENT_RECORD;
typedef int NEWTEXTMETRICW;
typedef int PACL;
typedef int PRINTDLGW;
typedef int PSECURITY_DESCRIPTOR;
typedef int PSID;
typedef int SECURITY_INFORMATION;
typedef int SHORT;
typedef int SMALL_RECT;
typedef int TEXTMETRIC;
typedef int UINT;
typedef int WCHAR;
typedef int WNDENUMPROC;
typedef int WORD;
typedef int WPARAM;
typedef void VOID;
#endif
/* Record all output and all keyboard & mouse input */
/* #define MCH_WRITE_DUMP */
#ifdef MCH_WRITE_DUMP
FILE* fdDump = NULL;
#endif
#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
extern char g_szOrigTitle[];
#endif
#ifdef FEAT_GUI
extern HWND s_hwnd;
#else
static HWND s_hwnd = 0; /* console window handle, set by GetConsoleHwnd() */
#endif
#ifdef FEAT_JOB_CHANNEL
int WSInitialized = FALSE; /* WinSock is initialized */
#endif
/* Don't generate prototypes here, because some systems do have these
* functions. */
#if defined(__GNUC__) && !defined(PROTO)
# ifndef __MINGW32__
int _stricoll(char *a, char *b)
{
// the ANSI-ish correct way is to use strxfrm():
char a_buff[512], b_buff[512]; // file names, so this is enough on Win32
strxfrm(a_buff, a, 512);
strxfrm(b_buff, b, 512);
return strcoll(a_buff, b_buff);
}
char * _fullpath(char *buf, char *fname, int len)
{
LPTSTR toss;
return (char *)GetFullPathName(fname, len, buf, &toss);
}
# endif
# if !defined(__MINGW32__) || (__GNUC__ < 4)
int _chdrive(int drive)
{
char temp [3] = "-:";
temp[0] = drive + 'A' - 1;
return !SetCurrentDirectory(temp);
}
# endif
#endif
#ifndef PROTO
/*
* Save the instance handle of the exe/dll.
*/
void
SaveInst(HINSTANCE hInst)
{
g_hinst = hInst;
}
#endif
#if defined(FEAT_GUI_MSWIN) || defined(PROTO)
/*
* GUI version of mch_exit().
* Shut down and exit with status `r'
* Careful: mch_exit() may be called before mch_init()!
*/
void
mch_exit_g(int r)
{
exiting = TRUE;
display_errors();
ml_close_all(TRUE); /* remove all memfiles */
# ifdef FEAT_OLE
UninitOLE();
# endif
# ifdef FEAT_JOB_CHANNEL
if (WSInitialized)
{
WSInitialized = FALSE;
WSACleanup();
}
# endif
#ifdef DYNAMIC_GETTEXT
dyn_libintl_end();
#endif
if (gui.in_use)
gui_exit(r);
#ifdef EXITFREE
free_all_mem();
#endif
exit(r);
}
#endif /* FEAT_GUI_MSWIN */
/*
* Init the tables for toupper() and tolower().
*/
void
mch_early_init(void)
{
int i;
PlatformId();
/* Init the tables for toupper() and tolower() */
for (i = 0; i < 256; ++i)
toupper_tab[i] = tolower_tab[i] = i;
CharUpperBuff((LPSTR)toupper_tab, 256);
CharLowerBuff((LPSTR)tolower_tab, 256);
}
/*
* Return TRUE if the input comes from a terminal, FALSE otherwise.
*/
int
mch_input_isatty(void)
{
#ifdef FEAT_GUI_MSWIN
# ifdef VIMDLL
if (gui.in_use)
# endif
return TRUE; /* GUI always has a tty */
#endif
#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
if (isatty(read_cmd_fd))
return TRUE;
return FALSE;
#endif
}
#ifdef FEAT_TITLE
/*
* mch_settitle(): set titlebar of our window
*/
void
mch_settitle(
char_u *title,
char_u *icon)
{
# ifdef FEAT_GUI_MSWIN
# ifdef VIMDLL
if (gui.in_use)
# endif
{
gui_mch_settitle(title, icon);
return;
}
# endif
# if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
if (title != NULL)
{
WCHAR *wp = enc_to_utf16(title, NULL);
if (wp == NULL)
return;
SetConsoleTitleW(wp);
vim_free(wp);
return;
}
# endif
}
/*
* Restore the window/icon title.
* which is one of:
* SAVE_RESTORE_TITLE: Just restore title
* SAVE_RESTORE_ICON: Just restore icon (which we don't have)
* SAVE_RESTORE_BOTH: Restore title and icon (which we don't have)
*/
void
mch_restore_title(int which UNUSED)
{
#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
# ifdef VIMDLL
if (!gui.in_use)
# endif
SetConsoleTitle(g_szOrigTitle);
#endif
}
/*
* Return TRUE if we can restore the title (we can)
*/
int
mch_can_restore_title(void)
{
return TRUE;
}
/*
* Return TRUE if we can restore the icon title (we can't)
*/
int
mch_can_restore_icon(void)
{
return FALSE;
}
#endif /* FEAT_TITLE */
/*
* Get absolute file name into buffer "buf" of length "len" bytes,
* turning all '/'s into '\\'s and getting the correct case of each component
* of the file name. Append a (back)slash to a directory name.
* When 'shellslash' set do it the other way around.
* Return OK or FAIL.
*/
int
mch_FullName(
char_u *fname,
char_u *buf,
int len,
int force UNUSED)
{
int nResult = FAIL;
WCHAR *wname;
WCHAR wbuf[MAX_PATH];
char_u *cname = NULL;
wname = enc_to_utf16(fname, NULL);
if (wname != NULL && _wfullpath(wbuf, wname, MAX_PATH) != NULL)
{
cname = utf16_to_enc((short_u *)wbuf, NULL);
if (cname != NULL)
{
vim_strncpy(buf, cname, len - 1);
nResult = OK;
}
}
vim_free(wname);
vim_free(cname);
#ifdef USE_FNAME_CASE
fname_case(buf, len);
#else
slash_adjust(buf);
#endif
return nResult;
}
/*
* Return TRUE if "fname" does not depend on the current directory.
*/
int
mch_isFullName(char_u *fname)
{
/* WinNT and later can use _MAX_PATH wide characters for a pathname, which
* means that the maximum pathname is _MAX_PATH * 3 bytes when 'enc' is
* UTF-8. */
char szName[_MAX_PATH * 3 + 1];
/* A name like "d:/foo" and "//server/share" is absolute */
if ((fname[0] && fname[1] == ':' && (fname[2] == '/' || fname[2] == '\\'))
|| (fname[0] == fname[1] && (fname[0] == '/' || fname[0] == '\\')))
return TRUE;
/* A name that can't be made absolute probably isn't absolute. */
if (mch_FullName(fname, (char_u *)szName, sizeof(szName) - 1, FALSE) == FAIL)
return FALSE;
return pathcmp((const char *)fname, (const char *)szName, -1) == 0;
}
/*
* Replace all slashes by backslashes.
* This used to be the other way around, but MS-DOS sometimes has problems
* with slashes (e.g. in a command name). We can't have mixed slashes and
* backslashes, because comparing file names will not work correctly. The
* commands that use a file name should try to avoid the need to type a
* backslash twice.
* When 'shellslash' set do it the other way around.
* When the path looks like a URL leave it unmodified.
*/
void
slash_adjust(char_u *p)
{
if (path_with_url(p))
return;
if (*p == '`')
{
size_t len = STRLEN(p);
/* don't replace backslash in backtick quoted strings */
if (len > 2 && *(p + len - 1) == '`')
return;
}
while (*p)
{
if (*p == psepcN)
*p = psepc;
MB_PTR_ADV(p);
}
}
/* Use 64-bit stat functions if available. */
#ifdef HAVE_STAT64
# undef stat
# undef _stat
# undef _wstat
# undef _fstat
# define stat _stat64
# define _stat _stat64
# define _wstat _wstat64
# define _fstat _fstat64
#endif
#if (defined(_MSC_VER) && (_MSC_VER >= 1300)) || defined(__MINGW32__)
# define OPEN_OH_ARGTYPE intptr_t
#else
# define OPEN_OH_ARGTYPE long
#endif
static int
wstat_symlink_aware(const WCHAR *name, stat_T *stp)
{
#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__MINGW32__)
/* Work around for VC12 or earlier (and MinGW). _wstat() can't handle
* symlinks properly.
* VC9 or earlier: _wstat() doesn't support a symlink at all. It retrieves
* status of a symlink itself.
* VC10: _wstat() supports a symlink to a normal file, but it doesn't
* support a symlink to a directory (always returns an error).
* VC11 and VC12: _wstat() doesn't return an error for a symlink to a
* directory, but it doesn't set S_IFDIR flag.
* MinGW: Same as VC9. */
int n;
BOOL is_symlink = FALSE;
HANDLE hFind, h;
DWORD attr = 0;
WIN32_FIND_DATAW findDataW;
hFind = FindFirstFileW(name, &findDataW);
if (hFind != INVALID_HANDLE_VALUE)
{
attr = findDataW.dwFileAttributes;
if ((attr & FILE_ATTRIBUTE_REPARSE_POINT)
&& (findDataW.dwReserved0 == IO_REPARSE_TAG_SYMLINK))
is_symlink = TRUE;
FindClose(hFind);
}
if (is_symlink)
{
h = CreateFileW(name, FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING,
(attr & FILE_ATTRIBUTE_DIRECTORY)
? FILE_FLAG_BACKUP_SEMANTICS : 0,
NULL);
if (h != INVALID_HANDLE_VALUE)
{
int fd;
fd = _open_osfhandle((OPEN_OH_ARGTYPE)h, _O_RDONLY);
n = _fstat(fd, (struct _stat *)stp);
if ((n == 0) && (attr & FILE_ATTRIBUTE_DIRECTORY))
stp->st_mode = (stp->st_mode & ~S_IFREG) | S_IFDIR;
_close(fd);
return n;
}
}
#endif
return _wstat(name, (struct _stat *)stp);
}
/*
* stat() can't handle a trailing '/' or '\', remove it first.
*/
int
vim_stat(const char *name, stat_T *stp)
{
/* WinNT and later can use _MAX_PATH wide characters for a pathname, which
* means that the maximum pathname is _MAX_PATH * 3 bytes when 'enc' is
* UTF-8. */
char_u buf[_MAX_PATH * 3 + 1];
char_u *p;
WCHAR *wp;
int n;
vim_strncpy((char_u *)buf, (char_u *)name, sizeof(buf) - 1);
p = buf + STRLEN(buf);
if (p > buf)
MB_PTR_BACK(buf, p);
/* Remove trailing '\\' except root path. */
if (p > buf && (*p == '\\' || *p == '/') && p[-1] != ':')
*p = NUL;
if ((buf[0] == '\\' && buf[1] == '\\') || (buf[0] == '/' && buf[1] == '/'))
{
/* UNC root path must be followed by '\\'. */
p = vim_strpbrk(buf + 2, (char_u *)"\\/");
if (p != NULL)
{
p = vim_strpbrk(p + 1, (char_u *)"\\/");
if (p == NULL)
STRCAT(buf, "\\");
}
}
wp = enc_to_utf16(buf, NULL);
if (wp == NULL)
return -1;
n = wstat_symlink_aware(wp, stp);
vim_free(wp);
return n;
}
#if (defined(FEAT_GUI_MSWIN) && !defined(VIMDLL)) || defined(PROTO)
void
mch_settmode(int tmode UNUSED)
{
/* nothing to do */
}
int
mch_get_shellsize(void)
{
/* never used */
return OK;
}
void
mch_set_shellsize(void)
{
/* never used */
}
/*
* Rows and/or Columns has changed.
*/
void
mch_new_shellsize(void)
{
/* never used */
}
#endif
/*
* We have no job control, so fake it by starting a new shell.
*/
void
mch_suspend(void)
{
suspend_shell();
}
#if defined(USE_MCH_ERRMSG) || defined(PROTO)
# ifdef display_errors
# undef display_errors
# endif
/*
* Display the saved error message(s).
*/
void
display_errors(void)
{
# ifdef FEAT_GUI
char *p;
# ifdef VIMDLL
if (gui.in_use || gui.starting)
# endif
{
if (error_ga.ga_data != NULL)
{
/* avoid putting up a message box with blanks only */
for (p = (char *)error_ga.ga_data; *p; ++p)
if (!isspace(*p))
{
(void)gui_mch_dialog(
gui.starting ? VIM_INFO :
VIM_ERROR,
gui.starting ? (char_u *)_("Message") :
(char_u *)_("Error"),
(char_u *)p, (char_u *)_("&Ok"),
1, NULL, FALSE);
break;
}
ga_clear(&error_ga);
}
return;
}
# endif
# if !defined(FEAT_GUI) || defined(VIMDLL)
FlushFileBuffers(GetStdHandle(STD_ERROR_HANDLE));
# endif
}
#endif
/*
* Return TRUE if "p" contain a wildcard that can be expanded by
* dos_expandpath().
*/
int
mch_has_exp_wildcard(char_u *p)
{
for ( ; *p; MB_PTR_ADV(p))
{
if (vim_strchr((char_u *)"?*[", *p) != NULL
|| (*p == '~' && p[1] != NUL))
return TRUE;
}
return FALSE;
}
/*
* Return TRUE if "p" contain a wildcard or a "~1" kind of thing (could be a
* shortened file name).
*/
int
mch_has_wildcard(char_u *p)
{
for ( ; *p; MB_PTR_ADV(p))
{
if (vim_strchr((char_u *)
# ifdef VIM_BACKTICK
"?*$[`"
# else
"?*$["
# endif
, *p) != NULL
|| (*p == '~' && p[1] != NUL))
return TRUE;
}
return FALSE;
}
/*
* The normal _chdir() does not change the default drive. This one does.
* Returning 0 implies success; -1 implies failure.
*/
int
mch_chdir(char *path)
{
WCHAR *p;
int n;
if (path[0] == NUL) /* just checking... */
return -1;
if (p_verbose >= 5)
{
verbose_enter();
smsg("chdir(%s)", path);
verbose_leave();
}
if (isalpha(path[0]) && path[1] == ':') /* has a drive name */
{
/* If we can change to the drive, skip that part of the path. If we
* can't then the current directory may be invalid, try using chdir()
* with the whole path. */
if (_chdrive(TOLOWER_ASC(path[0]) - 'a' + 1) == 0)
path += 2;
}
if (*path == NUL) /* drive name only */
return 0;
p = enc_to_utf16((char_u *)path, NULL);
if (p == NULL)
return -1;
n = _wchdir(p);
vim_free(p);
return n;
}
#if defined(FEAT_GUI_MSWIN) && !defined(VIMDLL)
/*
* return non-zero if a character is available
*/
int
mch_char_avail(void)
{
/* never used */
return TRUE;
}
# if defined(FEAT_TERMINAL) || defined(PROTO)
/*
* Check for any pending input or messages.
*/
int
mch_check_messages(void)
{
/* TODO: check for messages */
return TRUE;
}
# endif
#endif
/*
* set screen mode, always fails.
*/
int
mch_screenmode(char_u *arg UNUSED)
{
emsg(_(e_screenmode));
return FAIL;
}
#if defined(FEAT_LIBCALL) || defined(PROTO)
/*
* Call a DLL routine which takes either a string or int param
* and returns an allocated string.
* Return OK if it worked, FAIL if not.
*/
typedef LPTSTR (*MYSTRPROCSTR)(LPTSTR);
typedef LPTSTR (*MYINTPROCSTR)(int);
typedef int (*MYSTRPROCINT)(LPTSTR);
typedef int (*MYINTPROCINT)(int);
/*
* Check if a pointer points to a valid NUL terminated string.
* Return the length of the string, including terminating NUL.
* Returns 0 for an invalid pointer, 1 for an empty string.
*/
static size_t
check_str_len(char_u *str)
{
SYSTEM_INFO si;
MEMORY_BASIC_INFORMATION mbi;
size_t length = 0;
size_t i;
const char_u *p;
/* get page size */
GetSystemInfo(&si);
/* get memory information */
if (VirtualQuery(str, &mbi, sizeof(mbi)))
{
/* pre cast these (typing savers) */
long_u dwStr = (long_u)str;
long_u dwBaseAddress = (long_u)mbi.BaseAddress;
/* get start address of page that str is on */
long_u strPage = dwStr - (dwStr - dwBaseAddress) % si.dwPageSize;
/* get length from str to end of page */
long_u pageLength = si.dwPageSize - (dwStr - strPage);
for (p = str; !IsBadReadPtr(p, (UINT)pageLength);
p += pageLength, pageLength = si.dwPageSize)
for (i = 0; i < pageLength; ++i, ++length)
if (p[i] == NUL)
return length + 1;
}
return 0;
}
/*
* Passed to do_in_runtimepath() to load a vim.ico file.
*/
static void
mch_icon_load_cb(char_u *fname, void *cookie)
{
HANDLE *h = (HANDLE *)cookie;
*h = LoadImage(NULL,
(LPSTR)fname,
IMAGE_ICON,
64,
64,
LR_LOADFROMFILE | LR_LOADMAP3DCOLORS);
}
/*
* Try loading an icon file from 'runtimepath'.
*/
int
mch_icon_load(HANDLE *iconp)
{
return do_in_runtimepath((char_u *)"bitmaps/vim.ico",
0, mch_icon_load_cb, iconp);
}
int
mch_libcall(
char_u *libname,
char_u *funcname,
char_u *argstring, /* NULL when using a argint */
int argint,
char_u **string_result,/* NULL when using number_result */
int *number_result)
{
HINSTANCE hinstLib;
MYSTRPROCSTR ProcAdd;
MYINTPROCSTR ProcAddI;
char_u *retval_str = NULL;
int retval_int = 0;
size_t len;
BOOL fRunTimeLinkSuccess = FALSE;
// Get a handle to the DLL module.
hinstLib = vimLoadLib((char *)libname);
// If the handle is valid, try to get the function address.
if (hinstLib != NULL)
{
#ifdef HAVE_TRY_EXCEPT
__try
{
#endif
if (argstring != NULL)
{
/* Call with string argument */
ProcAdd = (MYSTRPROCSTR)GetProcAddress(hinstLib, (LPCSTR)funcname);
if ((fRunTimeLinkSuccess = (ProcAdd != NULL)) != 0)
{
if (string_result == NULL)
retval_int = ((MYSTRPROCINT)ProcAdd)((LPSTR)argstring);
else
retval_str = (char_u *)(ProcAdd)((LPSTR)argstring);
}
}
else
{
/* Call with number argument */
ProcAddI = (MYINTPROCSTR) GetProcAddress(hinstLib, (LPCSTR)funcname);
if ((fRunTimeLinkSuccess = (ProcAddI != NULL)) != 0)
{
if (string_result == NULL)
retval_int = ((MYINTPROCINT)ProcAddI)(argint);
else
retval_str = (char_u *)(ProcAddI)(argint);
}
}
// Save the string before we free the library.
// Assume that a "1" result is an illegal pointer.
if (string_result == NULL)
*number_result = retval_int;
else if (retval_str != NULL
&& (len = check_str_len(retval_str)) > 0)
{
*string_result = alloc(len);
if (*string_result != NULL)
mch_memmove(*string_result, retval_str, len);
}
#ifdef HAVE_TRY_EXCEPT
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
if (GetExceptionCode() == EXCEPTION_STACK_OVERFLOW)
RESETSTKOFLW();
fRunTimeLinkSuccess = 0;
}
#endif
// Free the DLL module.
(void)FreeLibrary(hinstLib);
}
if (!fRunTimeLinkSuccess)
{
semsg(_(e_libcall), funcname);
return FAIL;
}
return OK;
}
#endif
/*
* Debugging helper: expose the MCH_WRITE_DUMP stuff to other modules
*/
void
DumpPutS(const char *psz UNUSED)
{
# ifdef MCH_WRITE_DUMP
if (fdDump)
{
fputs(psz, fdDump);
if (psz[strlen(psz) - 1] != '\n')
fputc('\n', fdDump);
fflush(fdDump);
}
# endif
}
#ifdef _DEBUG
void __cdecl
Trace(
char *pszFormat,
...)
{
CHAR szBuff[2048];
va_list args;
va_start(args, pszFormat);
vsprintf(szBuff, pszFormat, args);
va_end(args);
OutputDebugString(szBuff);
}
#endif //_DEBUG
#if !defined(FEAT_GUI) || defined(VIMDLL) || defined(PROTO)
# ifdef FEAT_TITLE
extern HWND g_hWnd; /* This is in os_win32.c. */
# endif
/*
* Showing the printer dialog is tricky since we have no GUI
* window to parent it. The following routines are needed to
* get the window parenting and Z-order to work properly.
*/
static void
GetConsoleHwnd(void)
{
/* Skip if it's already set. */
if (s_hwnd != 0)
return;
# ifdef FEAT_TITLE
/* Window handle may have been found by init code (Windows NT only) */
if (g_hWnd != 0)
{
s_hwnd = g_hWnd;
return;
}
# endif
s_hwnd = GetConsoleWindow();
}
/*
* Console implementation of ":winpos".
*/
int
mch_get_winpos(int *x, int *y)
{
RECT rect;
GetConsoleHwnd();
GetWindowRect(s_hwnd, &rect);
*x = rect.left;
*y = rect.top;
return OK;
}