226 lines
8.1 KiB
C
226 lines
8.1 KiB
C
//
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// main.c
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// Spotlight Importer
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//
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// Created by Taybin on 1/24/07.
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// Copyright (c) 2007 Penguin Sounds. All rights reserved.
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//
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//==============================================================================
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//
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// DO NO MODIFY THE CONTENT OF THIS FILE
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//
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// This file contains the generic CFPlug-in code necessary for your importer
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// To complete your importer implement the function in GetMetadataForFile.c
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//
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//==============================================================================
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#include <CoreFoundation/CoreFoundation.h>
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#include <CoreFoundation/CFPlugInCOM.h>
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#include <CoreServices/CoreServices.h>
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// -----------------------------------------------------------------------------
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// constants
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// -----------------------------------------------------------------------------
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#define PLUGIN_ID "D77F8126-18F0-4ADE-917C-4A234A5590B9"
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//
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// Below is the generic glue code for all plug-ins.
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//
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// You should not have to modify this code aside from changing
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// names if you decide to change the names defined in the Info.plist
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//
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// -----------------------------------------------------------------------------
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// typedefs
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// -----------------------------------------------------------------------------
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// The import function to be implemented in GetMetadataForFile.c
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Boolean GetMetadataForFile(void *thisInterface,
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CFMutableDictionaryRef attributes,
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CFStringRef contentTypeUTI,
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CFStringRef pathToFile);
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// The layout for an instance of MetaDataImporterPlugIn
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typedef struct __MetadataImporterPluginType
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{
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MDImporterInterfaceStruct *conduitInterface;
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CFUUIDRef factoryID;
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UInt32 refCount;
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} MetadataImporterPluginType;
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// -----------------------------------------------------------------------------
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// prototypes
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// -----------------------------------------------------------------------------
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// Forward declaration for the IUnknown implementation.
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//
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MetadataImporterPluginType *AllocMetadataImporterPluginType(CFUUIDRef inFactoryID);
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void DeallocMetadataImporterPluginType(MetadataImporterPluginType *thisInstance);
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HRESULT MetadataImporterQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv);
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void *MetadataImporterPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID);
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ULONG MetadataImporterPluginAddRef(void *thisInstance);
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ULONG MetadataImporterPluginRelease(void *thisInstance);
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// -----------------------------------------------------------------------------
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// testInterfaceFtbl definition
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// -----------------------------------------------------------------------------
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// The TestInterface function table.
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//
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static MDImporterInterfaceStruct testInterfaceFtbl = {
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NULL,
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MetadataImporterQueryInterface,
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MetadataImporterPluginAddRef,
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MetadataImporterPluginRelease,
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GetMetadataForFile
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};
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// -----------------------------------------------------------------------------
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// AllocMetadataImporterPluginType
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// -----------------------------------------------------------------------------
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// Utility function that allocates a new instance.
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// You can do some initial setup for the importer here if you wish
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// like allocating globals etc...
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//
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MetadataImporterPluginType *AllocMetadataImporterPluginType(CFUUIDRef inFactoryID)
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{
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MetadataImporterPluginType *theNewInstance;
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theNewInstance = (MetadataImporterPluginType *)malloc(sizeof(MetadataImporterPluginType));
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memset(theNewInstance,0,sizeof(MetadataImporterPluginType));
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/* Point to the function table */
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theNewInstance->conduitInterface = &testInterfaceFtbl;
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/* Retain and keep an open instance refcount for each factory. */
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theNewInstance->factoryID = CFRetain(inFactoryID);
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CFPlugInAddInstanceForFactory(inFactoryID);
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/* This function returns the IUnknown interface so set the refCount to one. */
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theNewInstance->refCount = 1;
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return theNewInstance;
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}
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// -----------------------------------------------------------------------------
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// DeallocSpotlight_ImporterMDImporterPluginType
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// -----------------------------------------------------------------------------
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// Utility function that deallocates the instance when
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// the refCount goes to zero.
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// In the current implementation importer interfaces are never deallocated
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// but implement this as this might change in the future
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//
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void DeallocMetadataImporterPluginType(MetadataImporterPluginType *thisInstance)
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{
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CFUUIDRef theFactoryID;
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theFactoryID = thisInstance->factoryID;
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free(thisInstance);
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if (theFactoryID){
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CFPlugInRemoveInstanceForFactory(theFactoryID);
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CFRelease(theFactoryID);
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}
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}
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// -----------------------------------------------------------------------------
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// MetadataImporterQueryInterface
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// -----------------------------------------------------------------------------
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// Implementation of the IUnknown QueryInterface function.
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//
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HRESULT MetadataImporterQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv)
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{
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CFUUIDRef interfaceID;
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interfaceID = CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault,iid);
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if (CFEqual(interfaceID,kMDImporterInterfaceID)){
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/* If the Right interface was requested, bump the ref count,
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* set the ppv parameter equal to the instance, and
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* return good status.
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*/
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((MetadataImporterPluginType*)thisInstance)->conduitInterface->AddRef(thisInstance);
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*ppv = thisInstance;
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CFRelease(interfaceID);
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return S_OK;
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}else{
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if (CFEqual(interfaceID,IUnknownUUID)){
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/* If the IUnknown interface was requested, same as above. */
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((MetadataImporterPluginType*)thisInstance )->conduitInterface->AddRef(thisInstance);
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*ppv = thisInstance;
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CFRelease(interfaceID);
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return S_OK;
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}else{
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/* Requested interface unknown, bail with error. */
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*ppv = NULL;
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CFRelease(interfaceID);
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return E_NOINTERFACE;
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}
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}
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}
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// -----------------------------------------------------------------------------
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// MetadataImporterPluginAddRef
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// -----------------------------------------------------------------------------
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// Implementation of reference counting for this type. Whenever an interface
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// is requested, bump the refCount for the instance. NOTE: returning the
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// refcount is a convention but is not required so don't rely on it.
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//
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ULONG MetadataImporterPluginAddRef(void *thisInstance)
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{
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((MetadataImporterPluginType *)thisInstance )->refCount += 1;
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return ((MetadataImporterPluginType*) thisInstance)->refCount;
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}
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// -----------------------------------------------------------------------------
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// SampleCMPluginRelease
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// -----------------------------------------------------------------------------
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// When an interface is released, decrement the refCount.
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// If the refCount goes to zero, deallocate the instance.
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//
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ULONG MetadataImporterPluginRelease(void *thisInstance)
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{
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((MetadataImporterPluginType*)thisInstance)->refCount -= 1;
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if (((MetadataImporterPluginType*)thisInstance)->refCount == 0){
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DeallocMetadataImporterPluginType((MetadataImporterPluginType*)thisInstance );
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return 0;
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}else{
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return ((MetadataImporterPluginType*) thisInstance )->refCount;
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}
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}
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// -----------------------------------------------------------------------------
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// Spotlight_ImporterMDImporterPluginFactory
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// -----------------------------------------------------------------------------
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// Implementation of the factory function for this type.
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//
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void *MetadataImporterPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID)
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{
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MetadataImporterPluginType *result;
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CFUUIDRef uuid;
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/* If correct type is being requested, allocate an
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* instance of TestType and return the IUnknown interface.
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*/
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if (CFEqual(typeID,kMDImporterTypeID)){
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uuid = CFUUIDCreateFromString(kCFAllocatorDefault,CFSTR(PLUGIN_ID));
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result = AllocMetadataImporterPluginType(uuid);
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CFRelease(uuid);
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return result;
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}
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/* If the requested type is incorrect, return NULL. */
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return NULL;
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}
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