OSSerialize.h   [plain text]

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* OSSerialize.h created by rsulack on Wen 25-Nov-1998 */

#ifndef _OS_OSSERIALIZE_H
#define _OS_OSSERIALIZE_H

#include <libkern/c++/OSObject.h>

class OSSet;
class OSDictionary;

/*!
    @class OSSerialize
    @abstract A class used by the OS Container classes to serialize their instance data.
    @discussion This class is for the most part internal to the OS Container classes and should not be used directly.  Each class inherits a serialize() method from OSObject which is used to actually serialize an object.
*/

class OSSerialize : public OSObject
{
    OSDeclareDefaultStructors(OSSerialize)

protected:
    char *data;			// container for serialized data
    unsigned int length;		// of serialized data (counting NULL)
    unsigned int capacity;		// of container
    unsigned int capacityIncrement;	// of container

    unsigned int tag;
    OSDictionary *tags;		// tags for all objects seen

    struct ExpansionData { };
    
    /*! @var reserved
        Reserved for future use.  (Internal use only)  */
    ExpansionData *reserved;


public:
    static OSSerialize *withCapacity(unsigned int capacity);

    virtual char *text() const;

    virtual void clearText();	// using this can be a great speedup
                                    // if you are serializing the same object
                                    // over and over again

    // stuff to serialize your object
    virtual bool previouslySerialized(const OSMetaClassBase *);

    virtual bool addXMLStartTag(const OSMetaClassBase *o, const char *tagString);
    virtual bool addXMLEndTag(const char *tagString);

    virtual bool addChar(const char);
    virtual bool addString(const char *);

    // stuff you should never have to use (in theory)

    virtual bool initWithCapacity(unsigned int inCapacity);
    virtual unsigned int getLength() const;
    virtual unsigned int getCapacity() const;
    virtual unsigned int getCapacityIncrement() const;
    virtual unsigned int setCapacityIncrement(unsigned increment);
    virtual unsigned int ensureCapacity(unsigned int newCapacity);
    virtual void free();

    OSMetaClassDeclareReservedUnused(OSSerialize, 0);
    OSMetaClassDeclareReservedUnused(OSSerialize, 1);
    OSMetaClassDeclareReservedUnused(OSSerialize, 2);
    OSMetaClassDeclareReservedUnused(OSSerialize, 3);
    OSMetaClassDeclareReservedUnused(OSSerialize, 4);
    OSMetaClassDeclareReservedUnused(OSSerialize, 5);
    OSMetaClassDeclareReservedUnused(OSSerialize, 6);
    OSMetaClassDeclareReservedUnused(OSSerialize, 7);
};

typedef bool (*OSSerializerCallback)(void * target, void * ref,
                                     OSSerialize * s);

class OSSerializer : public OSObject
{
    OSDeclareDefaultStructors(OSSerializer)

    void * target;
    void * ref;
    OSSerializerCallback callback;
    
public:

    static OSSerializer * forTarget(void * target,
                                OSSerializerCallback callback, void * ref = 0);

    virtual bool serialize(OSSerialize * s) const;
};

#endif /* _OS_OSSERIALIZE_H */