/////////////////////////////////////////////////////////////////////////////
-// Name: utilsexec.cpp
+// Name: msw/utilsexec.cpp
// Purpose: Various utilities
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation "utils.h"
+ #pragma implementation
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#ifndef WX_PRECOMP
-#include "wx/setup.h"
-#include "wx/utils.h"
-#include "wx/app.h"
+ #include "wx/utils.h"
+ #include "wx/app.h"
+ #include "wx/intl.h"
+#endif
+
+#include "wx/log.h"
+
+#ifdef __WIN32__
+ #include "wx/stream.h"
+ #include "wx/process.h"
#endif
#include "wx/msw/private.h"
-#include <windows.h>
#include <ctype.h>
-#ifndef __GNUWIN32__
-#include <direct.h>
-#include <dos.h>
+#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__)
+ #include <direct.h>
+#ifndef __MWERKS__
+ #include <dos.h>
#endif
-
-#ifdef __GNUWIN32__
-#include <sys/unistd.h>
-#include <sys/stat.h>
-#ifndef __MINGW32__
-#include <std.h>
#endif
+#if defined(__GNUWIN32__) && !defined(__TWIN32__)
+ #include <sys/unistd.h>
+ #include <sys/stat.h>
#endif
-#ifdef __WIN32__
+#if defined(__WIN32__) && !defined(__WXWINE__)
#include <io.h>
#ifndef __GNUWIN32__
#include <stdlib.h>
#include <string.h>
#ifndef __WATCOMC__
-#if !(defined(_MSC_VER) && (_MSC_VER > 800))
-#include <errno.h>
-#endif
+ #if !(defined(_MSC_VER) && (_MSC_VER > 800))
+ #include <errno.h>
+ #endif
#endif
#include <stdarg.h>
-IMPLEMENT_DYNAMIC_CLASS(wxProcessEvent, wxEvent)
-IMPLEMENT_DYNAMIC_CLASS(wxProcess, wxEvtHandler)
+#if wxUSE_IPC
+ #include "wx/dde.h" // for WX_DDE hack in wxExecute
+#endif // wxUSE_IPC
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+// this message is sent when the process we're waiting for terminates
+#define wxWM_PROC_TERMINATED (WM_USER + 10000)
-#define wxEXECUTE_WIN_MESSAGE 10000
+// ----------------------------------------------------------------------------
+// this module globals
+// ----------------------------------------------------------------------------
-struct wxExecuteData {
- HWND window;
- HINSTANCE process;
- wxProcess *handler;
- char state;
+// we need to create a hidden window to receive the process termination
+// notifications and for this we need a (Win) class name for it which we will
+// register the first time it's needed
+static const wxChar *gs_classForHiddenWindow = NULL;
+
+// ----------------------------------------------------------------------------
+// private types
+// ----------------------------------------------------------------------------
+
+// structure describing the process we're being waiting for
+struct wxExecuteData
+{
+public:
+ ~wxExecuteData()
+ {
+#ifndef __WIN16__
+ if ( !::CloseHandle(hProcess) )
+ {
+ wxLogLastError("CloseHandle(hProcess)");
+ }
+#endif
+ }
+
+ HWND hWnd; // window to send wxWM_PROC_TERMINATED to
+ HANDLE hProcess; // handle of the process
+ DWORD dwProcessId; // pid of the process
+ wxProcess *handler;
+ DWORD dwExitCode; // the exit code of the process
+ bool state; // set to FALSE when the process finishes
};
#ifdef __WIN32__
-static DWORD wxExecuteThread(wxExecuteData *data)
+// ----------------------------------------------------------------------------
+// wxPipeStreams
+// ----------------------------------------------------------------------------
+
+class wxPipeInputStream: public wxInputStream {
+public:
+ wxPipeInputStream(HANDLE hInput);
+ ~wxPipeInputStream();
+
+protected:
+ size_t OnSysRead(void *buffer, size_t len);
+
+protected:
+ HANDLE m_hInput;
+};
+
+class wxPipeOutputStream: public wxOutputStream {
+public:
+ wxPipeOutputStream(HANDLE hOutput);
+ ~wxPipeOutputStream();
+
+protected:
+ size_t OnSysWrite(const void *buffer, size_t len);
+
+protected:
+ HANDLE m_hOutput;
+};
+
+// ==================
+// wxPipeInputStream
+// ==================
+
+wxPipeInputStream::wxPipeInputStream(HANDLE hInput)
{
- WaitForSingleObject(data->process, INFINITE);
+ m_hInput = hInput;
+}
- // Send an implicit message to the window
- SendMessage(data->window, wxEXECUTE_WIN_MESSAGE, 0, (LPARAM)data);
+wxPipeInputStream::~wxPipeInputStream()
+{
+ ::CloseHandle(m_hInput);
+}
- return 0;
+size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len)
+{
+ DWORD bytesRead;
+
+ m_lasterror = wxSTREAM_NOERROR;
+ if (! ::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) {
+ if (GetLastError() == ERROR_BROKEN_PIPE)
+ m_lasterror = wxSTREAM_EOF;
+ else
+ m_lasterror = wxSTREAM_READ_ERROR;
+ }
+ return bytesRead;
}
-#endif
+// ==================
+// wxPipeOutputStream
+// ==================
-LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message,
- WPARAM wParam, LPARAM lParam)
+wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput)
{
- wxExecuteData *data = (wxExecuteData *)lParam;
+ m_hOutput = hOutput;
+}
- if (message == wxEXECUTE_WIN_MESSAGE) {
- DestroyWindow(hWnd);
- if (data->handler)
- data->handler->OnTerminate((int)data->process);
+wxPipeOutputStream::~wxPipeOutputStream()
+{
+ ::CloseHandle(m_hOutput);
+}
- if (data->state)
- data->state = 0;
- else
- delete data;
- }
- return 0;
+size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len)
+{
+ DWORD bytesRead;
+
+ m_lasterror = wxSTREAM_NOERROR;
+ if (! ::WriteFile(m_hOutput, buffer, len, &bytesRead, NULL) ) {
+ if (GetLastError() == ERROR_BROKEN_PIPE)
+ m_lasterror = wxSTREAM_EOF;
+ else
+ m_lasterror = wxSTREAM_READ_ERROR;
+ }
+ return bytesRead;
}
-extern char wxPanelClassName[];
+#endif // __WIN32__
-long wxExecute(const wxString& command, bool sync, wxProcess *handler)
-{
- if (command == "")
- return 0;
+// ============================================================================
+// implementation
+// ============================================================================
#ifdef __WIN32__
- char * cl;
- char * argp;
- int clen;
- HINSTANCE result;
- DWORD dresult;
- HWND window;
- wxExecuteData *data;
- DWORD tid;
-
- // copy the command line
- clen = command.Length();
- if (!clen) return -1;
- cl = (char *) calloc( 1, 256);
- if (!cl) return -1;
- strcpy( cl, WXSTRINGCAST command);
-
- // isolate command and arguments
- argp = strchr( cl, ' ');
- if (argp)
- *argp++ = '\0';
+static DWORD wxExecuteThread(wxExecuteData *data)
+{
+ WaitForSingleObject(data->hProcess, INFINITE);
-#ifdef __GNUWIN32__
- result = ShellExecute((HWND) (wxTheApp->GetTopWindow() ? (HWND) wxTheApp->GetT
-opWindow()->GetHWND() : NULL),
- (const wchar_t) "open", (const wchar_t) cl, (const wchar_t) arg
-p,i
- (const wchar_t) NULL, SW_SHOWNORMAL);
-#else
- result = ShellExecute( (HWND) (wxTheApp->GetTopWindow() ? wxTheApp->GetTopWindow()->GetHWND() : NULL),
- "open", cl, argp, NULL, SW_SHOWNORMAL);
-#endif
+ // get the exit code
+ if ( !GetExitCodeProcess(data->hProcess, &data->dwExitCode) )
+ {
+ wxLogLastError("GetExitCodeProcess");
+ }
- if (((long)result) <= 32) {
- free(cl);
- return 0;
- }
-
- // Alloc data
- data = new wxExecuteData;
-
- // Create window
- window = CreateWindow(wxPanelClassName, NULL, 0, 0, 0, 0, 0, NULL,
- (HMENU) NULL, wxGetInstance(), 0);
-
- FARPROC ExecuteWindowInstance = MakeProcInstance((FARPROC) wxExecuteWindowCbk,
- wxGetInstance());
-
- SetWindowLong(window, GWL_WNDPROC, (LONG) ExecuteWindowInstance);
- SetWindowLong(window, GWL_USERDATA, (LONG) data);
-
- data->process = result;
- data->window = window;
- data->state = sync;
- data->handler = (sync) ? NULL : handler;
-
- dresult = (DWORD)CreateThread(NULL, 0,
- (LPTHREAD_START_ROUTINE)wxExecuteThread,
- (void *)data, 0, &tid);
- if (dresult == 0) {
- wxDebugMsg("wxExecute PANIC: I can't create the waiting thread !");
- DestroyWindow(window);
- return (long)result;
- }
-
- if (!sync)
- {
- free(cl);
- return (long)result;
- }
-
- // waiting until command executed
- while (data->state)
- wxYield();
-
- free(cl);
- return 0;
-#else
- long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
- if (instanceID < 32) return(0);
-
- if (sync) {
- int running;
- do {
- wxYield();
- running = GetModuleUsage((HANDLE)instanceID);
- } while (running);
- }
- return(instanceID);
-#endif
+ wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE,
+ wxT("process should have terminated") );
+
+ // send a message indicating process termination to the window
+ SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data);
+
+ return 0;
}
-// DUMMIES TO SATISFY THE LINKER UNTIL GUILHEM FINISHES THE CODE
-wxProcess::wxProcess(wxEvtHandler *parent, int id)
+// window procedure of a hidden window which is created just to receive
+// the notification message when a process exits
+LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message,
+ WPARAM wParam, LPARAM lParam)
{
+ if ( message == wxWM_PROC_TERMINATED )
+ {
+ DestroyWindow(hWnd); // we don't need it any more
+
+ wxExecuteData *data = (wxExecuteData *)lParam;
+ if ( data->handler )
+ {
+ data->handler->OnTerminate((int)data->dwProcessId,
+ (int)data->dwExitCode);
+ }
+
+ if ( data->state )
+ {
+ // we're executing synchronously, tell the waiting thread
+ // that the process finished
+ data->state = 0;
+ }
+ else
+ {
+ // asynchronous execution - we should do the clean up
+ delete data;
+ }
+
+ return 0;
+ }
+ else
+ {
+ return DefWindowProc(hWnd, message, wParam, lParam);
+ }
}
+#endif // Win32
-wxProcess::~wxProcess()
+long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
{
+ wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") );
+
+ wxString command;
+#if wxUSE_IPC
+ // DDE hack: this is really not pretty, but we need to allow this for
+ // transparent handling of DDE servers in wxMimeTypesManager. Usually it
+ // returns the command which should be run to view/open/... a file of the
+ // given type. Sometimes, however, this command just launches the server
+ // and an additional DDE request must be made to really open the file. To
+ // keep all this well hidden from the application, we allow a special form
+ // of command: WX_DDE:<command>:DDE_SERVER:DDE_TOPIC:DDE_COMMAND in which
+ // case we execute just <command> and process the rest below
+ wxString ddeServer, ddeTopic, ddeCommand;
+ static const size_t lenDdePrefix = 7; // strlen("WX_DDE:")
+ if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") )
+ {
+ const wxChar *p = cmd.c_str() + 7;
+ while ( *p && *p != _T('#') )
+ {
+ command += *p++;
+ }
+
+ if ( *p )
+ {
+ // skip '#'
+ p++;
+ }
+ else
+ {
+ wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ }
+
+ while ( *p && *p != _T('#') )
+ {
+ ddeServer += *p++;
+ }
+
+ if ( *p )
+ {
+ // skip '#'
+ p++;
+ }
+ else
+ {
+ wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ }
+
+ while ( *p && *p != _T('#') )
+ {
+ ddeTopic += *p++;
+ }
+
+ if ( *p )
+ {
+ // skip '#'
+ p++;
+ }
+ else
+ {
+ wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ }
+
+ while ( *p )
+ {
+ ddeCommand += *p++;
+ }
+ }
+ else
+#endif // wxUSE_IPC
+ {
+ // no DDE
+ command = cmd;
+ }
+
+#if defined(__WIN32__) && !defined(__TWIN32__)
+ // the old code is disabled because we really need a process handle
+ // if we want to execute it asynchronously or even just get its
+ // return code and for this we must use CreateProcess() and not
+ // ShellExecute()
+#if 0
+ // isolate command and arguments
+ wxString commandName;
+ bool insideQuotes = FALSE;
+ const char *pc;
+ for ( pc = command.c_str(); *pc != '\0'; pc++ )
+ {
+ switch ( *pc )
+ {
+ case ' ':
+ case '\t':
+ if ( !insideQuotes )
+ break;
+ // fall through
+
+ case '"':
+ insideQuotes = !insideQuotes;
+ // fall through
+
+ default:
+ commandName += *pc;
+ continue; // skip the next break
+ }
+
+ // only reached for space not inside quotes
+ break;
+ }
+ wxString commandArgs = pc;
+
+ wxWindow *winTop = wxTheApp->GetTopWindow();
+ HWND hwndTop = (HWND)(winTop ? winTop->GetHWND() : 0);
+
+ HANDLE result;
+#ifdef __GNUWIN32__
+ result = ShellExecute(hwndTop,
+ (const wchar_t)"open",
+ (const wchar_t)commandName,
+ (const wchar_t)commandArgs,
+ (const wchar_t)NULL,
+ SW_SHOWNORMAL);
+#else // !GNUWIN32
+ result = ShellExecute(hwndTop, "open", commandName,
+ commandArgs, NULL, SW_SHOWNORMAL);
+#endif // GNUWIN32
+
+ if ( ((long)result) <= 32 )
+ wxLogSysError(_("Can't execute command '%s'"), command.c_str());
+
+ return result;
+#else // 1
+
+ HANDLE h_readPipe[2];
+ HANDLE h_writePipe[2];
+ HANDLE h_oldreadPipe;
+ HANDLE h_oldwritePipe;
+ BOOL inheritHandles;
+
+ // ------------------------------------
+ // Pipe handling
+ // We are in the case of opening a pipe
+ inheritHandles = FALSE;
+ if (handler && handler->NeedPipe()) {
+ SECURITY_ATTRIBUTES security;
+
+ security.nLength = sizeof(security);
+ security.lpSecurityDescriptor = NULL;
+ security.bInheritHandle = TRUE;
+
+ if (! ::CreatePipe(&h_readPipe[0], &h_readPipe[1], &security, 0) ) {
+ wxLogSysError(_T("Can't create the inter-process read pipe"));
+
+ return 0;
+ }
+
+ if (! ::CreatePipe(&h_writePipe[0], &h_writePipe[1], &security, 0) ) {
+ wxLogSysError(_T("Can't create the inter-process read pipe"));
+
+ return 0;
+ }
+
+ // We need to save the old stdio handles to restore them after the call
+ // to CreateProcess
+ h_oldreadPipe = GetStdHandle(STD_INPUT_HANDLE);
+ h_oldwritePipe = GetStdHandle(STD_OUTPUT_HANDLE);
+
+ SetStdHandle(STD_INPUT_HANDLE, h_readPipe[0]);
+ SetStdHandle(STD_OUTPUT_HANDLE, h_writePipe[1]);
+
+ inheritHandles = TRUE;
+ }
+
+ // create the process
+ STARTUPINFO si;
+ wxZeroMemory(si);
+
+ si.cb = sizeof(si);
+
+ PROCESS_INFORMATION pi;
+
+ if ( ::CreateProcess(
+ NULL, // application name (use only cmd line)
+ (wxChar *)command.c_str(), // full command line
+ NULL, // security attributes: defaults for both
+ NULL, // the process and its main thread
+ inheritHandles, // inherit handles if we need pipes
+ CREATE_DEFAULT_ERROR_MODE |
+ CREATE_SUSPENDED, // flags
+ NULL, // environment (use the same)
+ NULL, // current directory (use the same)
+ &si, // startup info (unused here)
+ &pi // process info
+ ) == 0 )
+ {
+ if (inheritHandles) {
+ ::CloseHandle(h_writePipe[0]);
+ ::CloseHandle(h_writePipe[1]);
+ ::CloseHandle(h_readPipe[0]);
+ ::CloseHandle(h_readPipe[1]);
+ }
+ wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
+
+ return 0;
+ }
+
+ // Restore the old stdio handles
+ if (inheritHandles) {
+ SetStdHandle(STD_INPUT_HANDLE, h_oldreadPipe);
+ SetStdHandle(STD_OUTPUT_HANDLE, h_oldwritePipe);
+
+ ::CloseHandle(h_writePipe[1]);
+ ::CloseHandle(h_readPipe[0]);
+ // We can now initialize the wxStreams
+ wxInputStream *processOutput = new wxPipeInputStream(h_writePipe[0]);
+ wxOutputStream *processInput = new wxPipeOutputStream(h_readPipe[1]);
+
+ handler->SetPipeStreams(processOutput, processInput);
+ }
+
+ // register the class for the hidden window used for the notifications
+ if ( !gs_classForHiddenWindow )
+ {
+ gs_classForHiddenWindow = _T("wxHiddenWindow");
+
+ WNDCLASS wndclass;
+ wxZeroMemory(wndclass);
+ wndclass.lpfnWndProc = (WNDPROC)wxExecuteWindowCbk;
+ wndclass.hInstance = wxGetInstance();
+ wndclass.lpszClassName = gs_classForHiddenWindow;
+
+ if ( !::RegisterClass(&wndclass) )
+ {
+ wxLogLastError("RegisterClass(hidden window)");
+ }
+ }
+
+ // create a hidden window to receive notification about process
+ // termination
+ HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL,
+ WS_OVERLAPPEDWINDOW,
+ 0, 0, 0, 0, NULL,
+ (HMENU)NULL, wxGetInstance(), 0);
+ wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") );
+
+ // Alloc data
+ wxExecuteData *data = new wxExecuteData;
+ data->hProcess = pi.hProcess;
+ data->dwProcessId = pi.dwProcessId;
+ data->hWnd = hwnd;
+ data->state = sync;
+ if ( sync )
+ {
+ wxASSERT_MSG( !handler, wxT("wxProcess param ignored for sync execution") );
+
+ data->handler = NULL;
+ }
+ else
+ {
+ // may be NULL or not
+ data->handler = handler;
+ }
+
+ DWORD tid;
+ HANDLE hThread = ::CreateThread(NULL,
+ 0,
+ (LPTHREAD_START_ROUTINE)wxExecuteThread,
+ (void *)data,
+ 0,
+ &tid);
+
+ // resume process we created now - whether the thread creation succeeded or
+ // not
+ if ( ::ResumeThread(pi.hThread) == (DWORD)-1 )
+ {
+ // ignore it - what can we do?
+ wxLogLastError("ResumeThread in wxExecute");
+ }
+
+ // close unneeded handle
+ if ( !::CloseHandle(pi.hThread) )
+ wxLogLastError("CloseHandle(hThread)");
+
+ if ( !hThread )
+ {
+ wxLogLastError("CreateThread in wxExecute");
+
+ DestroyWindow(hwnd);
+ delete data;
+
+ // the process still started up successfully...
+ return pi.dwProcessId;
+ }
+
+#if wxUSE_IPC
+ // second part of DDE hack: now establish the DDE conversation with the
+ // just launched process
+ if ( !!ddeServer )
+ {
+ wxDDEClient client;
+ wxConnectionBase *conn = client.MakeConnection(_T(""),
+ ddeServer,
+ ddeTopic);
+ if ( !conn || !conn->Execute(ddeCommand) )
+ {
+ wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str());
+ }
+ }
+#endif // wxUSE_IPC
+
+ if ( !sync )
+ {
+ // clean up will be done when the process terminates
+
+ // return the pid
+ return pi.dwProcessId;
+ }
+
+ // waiting until command executed (disable everything while doing it)
+#if wxUSE_GUI
+ wxBeginBusyCursor();
+ wxEnableTopLevelWindows(FALSE);
+#endif // wxUSE_GUI
+
+ while ( data->state )
+ wxYield();
+
+#if wxUSE_GUI
+ wxEnableTopLevelWindows(TRUE);
+ wxEndBusyCursor();
+#endif // wxUSE_GUI
+
+ DWORD dwExitCode = data->dwExitCode;
+ delete data;
+
+ // return the exit code
+ return dwExitCode;
+#endif // 0/1
+#else // Win16
+ long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
+ if (instanceID < 32) return(0);
+
+ if (sync) {
+ int running;
+ do {
+ wxYield();
+ running = GetModuleUsage((HINSTANCE)instanceID);
+ } while (running);
+ }
+
+ return(instanceID);
+#endif // Win16/32
}
-void wxProcess::OnTerminate(int pid)
+long wxExecute(char **argv, bool sync, wxProcess *handler)
{
+ wxString command;
+
+ while ( *argv != NULL )
+ {
+ command << *argv++ << ' ';
+ }
+
+ command.RemoveLast();
+
+ return wxExecute(command, sync, handler);
}
-wxProcessEvent::wxProcessEvent(int id, int pid)
+// ----------------------------------------------------------------------------
+// Metafile helpers
+// ----------------------------------------------------------------------------
+
+extern void PixelToHIMETRIC(LONG *x, LONG *y)
{
+ ScreenHDC hdcRef;
+
+ int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE),
+ iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE),
+ iWidthPels = GetDeviceCaps(hdcRef, HORZRES),
+ iHeightPels = GetDeviceCaps(hdcRef, VERTRES);
+
+ *x *= (iWidthMM * 100);
+ *x /= iWidthPels;
+ *y *= (iHeightMM * 100);
+ *y /= iHeightPels;
}
-
+extern void HIMETRICToPixel(LONG *x, LONG *y)
+{
+ ScreenHDC hdcRef;
+
+ int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE),
+ iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE),
+ iWidthPels = GetDeviceCaps(hdcRef, HORZRES),
+ iHeightPels = GetDeviceCaps(hdcRef, VERTRES);
+
+ *x *= iWidthPels;
+ *x /= (iWidthMM * 100);
+ *y *= iHeightPels;
+ *y /= (iHeightMM * 100);
+}
projects / wxWidgets.git / blobdiff