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<pre class="sourcecodebox">/* File: CFM_MachO_CFM.c Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated. The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Copyright © 1999-2001 Apple Computer, Inc., All Rights Reserved*/// This sample demonstrates how to call a Mach-O routine, and pass in a CFM based function pointer as a callback parameter.#define TARGET_API_MAC_CARBON 1#include <Carbon.h>#include <string.h>// Typedef for the function pointer.typedef void (*MainSysBeepFunctionPtr)( short numBeeps ); // Callback routinetypedef short (*GetFooWithCallBackFunctionPtr)( short numBeeps, MainSysBeepFunctionPtr callBackFunctionPtr ); // Mach-O function// Function pointer.GetFooWithCallBackFunctionPtr GetFooWithCallBack = NULL;MainSysBeepFunctionPtr SysBeepCallBack = NULL;typedef struct { CFURLRef bundleURL; CFBundleRef myBundle;} GlobalsRec;GlobalsRec g; // The globalsvoid MainSysBeep( short numBeeps );static OSStatus InstallStandardMenuBar(void);static pascal OSStatus MyWindowEventHandler(EventHandlerCallRef myHandler, EventRef event, void* userData);static void HandleWindowUpdate(WindowRef window);static pascal OSErr QuitAppleEventHandler(const AppleEvent *appleEvt, AppleEvent* reply, long refcon);static void DoTheStuff( void );void *MachOFunctionPointerForCFMFunctionPointer( void *cfmfp );#define mFile 129#define iQuit 1void main(void){ Rect bounds = { 100, 100, 300, 500 }; WindowRef window; OSStatus err; EventHandlerRef ref; EventTypeSpec list[] = { {kEventClassWindow, kEventWindowClose }, { kEventClassWindow, kEventWindowDrawContent } }; InitCursor(); err = InstallStandardMenuBar(); err = AEInstallEventHandler(kCoreEventClass, kAEQuitApplication, NewAEEventHandlerUPP(QuitAppleEventHandler), 0, false); err = CreateNewWindow(kDocumentWindowClass, kWindowStandardDocumentAttributes | kWindowStandardHandlerAttribute, &bounds, &window); InstallWindowEventHandler(window, NewEventHandlerUPP(MyWindowEventHandler), 2, list, 0, &ref); DoTheStuff(); ShowWindow(window); RunApplicationEventLoop(); ExitToShell();}static pascal OSStatusMyWindowEventHandler(EventHandlerCallRef myHandler, EventRef event, void* userData){#pragma unused (myHandler, userData) WindowRef window; OSStatus result = eventNotHandledErr; GetEventParameter(event, kEventParamDirectObject, typeWindowRef, NULL, sizeof(window), NULL, &window); if (GetEventKind(event) == kEventWindowDrawContent) { HandleWindowUpdate(window); result = noErr; } else if (GetEventKind(event) == kEventWindowClose) { DisposeWindow(window); QuitApplicationEventLoop(); result = noErr; } return result;}static void HandleWindowUpdate(WindowRef window){ Rect bounds; //SInt16 textWidth; char text[1024]; SetPortWindowPort( window ); EraseRect( GetWindowPortBounds(window, &bounds) ); TextSize( 12 ); SetRect( &bounds, bounds.top+20, bounds.left+20, bounds.bottom, bounds.right ); TETextBox( text, strlen(text), &bounds, teJustLeft ); // Preferably we would use a CFString for the string handling, in this // case in conjunction with TXNDrawUnicodeTextBox. // SetRect(&bounds, bounds.top,bounds.left,bounds.top + 50,bounds.left+textWidth); // TXNDrawCFStringTextBox(CFSTR("Hello World!"), &bounds, NULL, NULL);}static OSStatus InstallStandardMenuBar(void){ Handle menuBar; MenuRef menu; long response; OSStatus err = noErr; menuBar = GetNewMBar(128); if (menuBar) { SetMenuBar(menuBar); // check to see if we should modify the File menu's quit item in // order to follow the Aqua HI quit guideline err = Gestalt(gestaltMenuMgrAttr, &response); if ((err == noErr) && (response & gestaltMenuMgrAquaLayoutMask)) { menu = GetMenuHandle(mFile); DeleteMenuItem(menu, iQuit); } DrawMenuBar(); } return err;}static pascal OSErr QuitAppleEventHandler(const AppleEvent *appleEvt, AppleEvent* reply, long refcon){#pragma unused (appleEvt, reply, refcon) QuitApplicationEventLoop(); return(noErr);}//// This function allocates a block of CFM glue code which contains the instructions to call CFM routines//UInt32 template[6] = {0x3D800000, 0x618C0000, 0x800C0000, 0x804C0004, 0x7C0903A6, 0x4E800420};void *MachOFunctionPointerForCFMFunctionPointer( void *cfmfp ){ UInt32 *mfp = (UInt32*) NewPtr( sizeof(template) ); // Must later dispose of allocated memory mfp[0] = template[0] | ((UInt32)cfmfp >> 16); mfp[1] = template[1] | ((UInt32)cfmfp & 0xFFFF); mfp[2] = template[2]; mfp[3] = template[3]; mfp[4] = template[4]; mfp[5] = template[5]; MakeDataExecutable( mfp, sizeof(template) ); return( mfp );}static void DoTheStuff(){ short err; Boolean didLoad = false; // Flag that indicates the status returned when attempting to load a bundle's executable code. memset( &g, 0, sizeof(GlobalsRec) ); // Initialize the globals // Make a CFURLRef from the CFString representation of the bundle's path. // See the Core Foundation URL Services chapter for details. g.bundleURL = CFURLCreateWithFileSystemPath( nil, // workaround for Radar # 2452789 CFSTR("/Test.bundle"), // hard coded path for sample 0, true ); if ( g.bundleURL != NULL ) // Make a bundle instance using the URLRef. g.myBundle = CFBundleCreate( NULL /* kCFAllocatorDefault */, // workaround for Radar # 2452789 g.bundleURL ); if ( g.myBundle != NULL ) { didLoad = CFBundleLoadExecutable( g.myBundle ); // Try to load the executable from my bundle. if ( didLoad == true ) // If the code was successfully loaded, look for our function. { // Now that the code is loaded, search for the function we want by name. GetFooWithCallBack = (void*)CFBundleGetFunctionPointerForName( g.myBundle, CFSTR("GetFooWithCallBack") ); // If our function was found in the loaded code, call it with a test value. if ( GetFooWithCallBack != nil ) { SysBeepCallBack = MachOFunctionPointerForCFMFunctionPointer( MainSysBeep ); err = GetFooWithCallBack( 3, SysBeepCallBack ); // This Calls our mach-o function DisposePtr( (Ptr) SysBeepCallBack ); } CFBundleUnloadExecutable( g.myBundle ); // Unload the bundle's executable code. } } else { (void) Alert( 128, nil ); } // Any CF objects returned from functions with "create" or "copy" in their names must be released by us! if ( g.bundleURL != NULL ) CFRelease( g.bundleURL ); if ( g.myBundle != NULL ) CFRelease( g.myBundle );}void MainSysBeep( short numBeeps ){ short i; for ( i=0 ; i<numBeeps ; i++ ) SysBeep( 5 );}</pre>
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