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#import <WebKit/npapi.h>
#import <WebKit/npfunctions.h>
#import <WebKit/npruntime.h>

NPNetscapeFuncs *browser;

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16_t mode, int16_t argc, char* argn[], char* argv[], NPSavedData* saved);
NPError NPP_Destroy(NPP instance, NPSavedData** save);
NPError NPP_SetWindow(NPP instance, NPWindow* window);
NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16_t* stype);
NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason);
int32_t NPP_WriteReady(NPP instance, NPStream* stream);
int32_t NPP_Write(NPP instance, NPStream* stream, int32_t offset, int32_t len, void* buffer);
void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname);
void NPP_Print(NPP instance, NPPrint* platformPrint);
int16_t NPP_HandleEvent(NPP instance, void* event);
void NPP_URLNotify(NPP instance, const char* URL, NPReason reason, void* notifyData);
NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value);
NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value);

#pragma export on
// Mach-o entry points
NPError NP_Initialize(NPNetscapeFuncs *browserFuncs);
NPError NP_GetEntryPoints(NPPluginFuncs *pluginFuncs);
void NP_Shutdown(void);
// For compatibility with CFM browsers.
int main(NPNetscapeFuncs *browserFuncs, NPPluginFuncs *pluginFuncs, NPP_ShutdownProcPtr *shutdown);
#pragma export off


typedef void (* FunctionPointer) (void);
typedef void (* TransitionVector) (void);
static FunctionPointer functionPointerForTVector(TransitionVector);
static TransitionVector tVectorForFunctionPointer(FunctionPointer);

// Mach-o entry points
NPError NP_Initialize(NPNetscapeFuncs* browserFuncs)
{
    browser = browserFuncs;
    return NPERR_NO_ERROR;
}

NPError NP_GetEntryPoints(NPPluginFuncs* pluginFuncs)
{
    pluginFuncs->version = 11;
    pluginFuncs->size = sizeof(pluginFuncs);
    pluginFuncs->newp = NPP_New;
    pluginFuncs->destroy = NPP_Destroy;
    pluginFuncs->setwindow = NPP_SetWindow;
    pluginFuncs->newstream = NPP_NewStream;
    pluginFuncs->destroystream = NPP_DestroyStream;
    pluginFuncs->asfile = NPP_StreamAsFile;
    pluginFuncs->writeready = NPP_WriteReady;
    pluginFuncs->write = (NPP_WriteProcPtr)NPP_Write;
    pluginFuncs->print = NPP_Print;
    pluginFuncs->event = NPP_HandleEvent;
    pluginFuncs->urlnotify = NPP_URLNotify;
    pluginFuncs->getvalue = NPP_GetValue;
    pluginFuncs->setvalue = NPP_SetValue;
    
    return NPERR_NO_ERROR;
}

void NP_Shutdown(void)
{

}
 
// For compatibility with CFM browsers.
int main(NPNetscapeFuncs *browserFuncs, NPPluginFuncs *pluginFuncs, NPP_ShutdownProcPtr *shutdown)
{
    browser = malloc(sizeof(NPNetscapeFuncs));
    bzero(browser, sizeof(NPNetscapeFuncs));
    
    browser->size = browserFuncs->size;
    browser->version = browserFuncs->version;
    
    // Since this is a mach-o plugin and the browser is CFM because it is calling main, translate
    // our function points into TVectors so the browser can call them.
    browser->geturl = (NPN_GetURLProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->geturl);
    browser->posturl = (NPN_PostURLProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->posturl);
    browser->requestread = (NPN_RequestReadProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->requestread);
    browser->newstream = (NPN_NewStreamProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->newstream);
    browser->write = (NPN_WriteProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->write);
    browser->destroystream = (NPN_DestroyStreamProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->destroystream);
    browser->status = (NPN_StatusProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->status);
    browser->uagent = (NPN_UserAgentProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->uagent);
    browser->memalloc = (NPN_MemAllocProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->memalloc);
    browser->memfree = (NPN_MemFreeProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->memfree);
    browser->memflush = (NPN_MemFlushProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->memflush);
    browser->reloadplugins = (NPN_ReloadPluginsProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->reloadplugins);
    browser->geturlnotify = (NPN_GetURLNotifyProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->geturlnotify);
    browser->posturlnotify = (NPN_PostURLNotifyProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->posturlnotify);
    browser->getvalue = (NPN_GetValueProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->getvalue);
    browser->setvalue = (NPN_SetValueProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->setvalue);
    browser->invalidaterect = (NPN_InvalidateRectProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->invalidaterect);
    browser->invalidateregion = (NPN_InvalidateRegionProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->invalidateregion);
    browser->forceredraw = (NPN_ForceRedrawProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->forceredraw);
    browser->getJavaEnv = (NPN_GetJavaEnvProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->getJavaEnv);
    browser->getJavaPeer = (NPN_GetJavaPeerProcPtr)functionPointerForTVector((TransitionVector)browserFuncs->getJavaPeer);
    
    pluginFuncs->version = 11;
    pluginFuncs->size = sizeof(pluginFuncs);
    pluginFuncs->newp = (NPP_NewProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_New);
    pluginFuncs->destroy = (NPP_DestroyProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_Destroy);
    pluginFuncs->setwindow = (NPP_SetWindowProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_SetWindow);
    pluginFuncs->newstream = (NPP_NewStreamProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_NewStream);
    pluginFuncs->destroystream = (NPP_DestroyStreamProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_DestroyStream);
    pluginFuncs->asfile = (NPP_StreamAsFileProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_StreamAsFile);
    pluginFuncs->writeready = (NPP_WriteReadyProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_WriteReady);
    pluginFuncs->write = (NPP_WriteProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_Write);
    pluginFuncs->print = (NPP_PrintProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_Print);
    pluginFuncs->event = (NPP_HandleEventProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_HandleEvent);
    pluginFuncs->urlnotify = (NPP_URLNotifyProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_URLNotify);
    pluginFuncs->getvalue = (NPP_GetValueProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_GetValue);
    pluginFuncs->setvalue = (NPP_SetValueProcPtr)tVectorForFunctionPointer((FunctionPointer)NPP_SetValue);
    
    *shutdown = (NPP_ShutdownProcPtr)tVectorForFunctionPointer((FunctionPointer)NP_Shutdown);
    
    return NPERR_NO_ERROR;
}

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16_t mode, int16_t argc, char* argn[], char* argv[], NPSavedData* saved)
{
    // Call window.alert("Success!")
    NPError error;
    NPObject *windowObject = NULL;
    error = browser->getvalue(instance, NPNVWindowNPObject, &windowObject);
    if (error == NPERR_NO_ERROR) {
        NPVariant alertMessage;
        STRINGZ_TO_NPVARIANT("Success!", alertMessage);
        NPVariant result;
        browser->invoke(instance, windowObject, browser->getstringidentifier("alert"), &alertMessage, 1, &result);
        browser->releaseobject(windowObject);
    }
    
    return NPERR_NO_ERROR;
}

NPError NPP_Destroy(NPP instance, NPSavedData** save)
{
    return NPERR_NO_ERROR;
}

NPError NPP_SetWindow(NPP instance, NPWindow* window)
{
    return NPERR_NO_ERROR;
}

NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16_t* stype)
{
    *stype = NP_ASFILEONLY;
    return NPERR_NO_ERROR;
}

NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason)
{
    return NPERR_NO_ERROR;
}

int32_t NPP_WriteReady(NPP instance, NPStream* stream)
{
    return 0;
}

int32_t NPP_Write(NPP instance, NPStream* stream, int32_t offset, int32_t len, void* buffer)
{
    return 0;
}

void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname)
{
}

void NPP_Print(NPP instance, NPPrint* platformPrint)
{

}

int16_t NPP_HandleEvent(NPP instance, void* event)
{
    return 1;
}

void NPP_URLNotify(NPP instance, const char* url, NPReason reason, void* notifyData)
{

}

NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value)
{
    return NPERR_GENERIC_ERROR;
}

NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value)
{
    return NPERR_GENERIC_ERROR;
}

// function pointer converters

FunctionPointer functionPointerForTVector(TransitionVector tvp)
{
    const uint32_t temp[6] = {0x3D800000, 0x618C0000, 0x800C0000, 0x804C0004, 0x7C0903A6, 0x4E800420};
    uint32_t *newGlue = NULL;
    
    if (tvp != NULL) {
        newGlue = (uint32_t *)malloc(sizeof(temp));
        if (newGlue != NULL) {
            unsigned i;
            for (i = 0; i < 6; i++) newGlue[i] = temp[i];
            newGlue[0] |= ((UInt32)tvp >> 16);
            newGlue[1] |= ((UInt32)tvp & 0xFFFF);
            MakeDataExecutable(newGlue, sizeof(temp));
        }
    }
    
    return (FunctionPointer)newGlue;
}

TransitionVector tVectorForFunctionPointer(FunctionPointer fp)
{
    FunctionPointer *newGlue = NULL;
    if (fp != NULL) {
        newGlue = (FunctionPointer *)malloc(2 * sizeof(FunctionPointer));
        if (newGlue != NULL) {
            newGlue[0] = fp;
            newGlue[1] = NULL;
        }
    }
    return (TransitionVector)newGlue;
}
