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/* Collection definitions for the use of subclass implementations only
Copyright (C) 1993,1994, 1995 Free Software Foundation, Inc.
Written by: R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
Date: May 1993
This file is part of the GNU Objective C Class Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CollectionPrivate_h_INCLUDE_GNU
#define __CollectionPrivate_h_INCLUDE_GNU
#include <objects/stdobjects.h>
#include <objects/eltfuncs.h>
@interface Collection (ArchivingHelpers)
/* These methods should never be called except in order inside
-write: and -read: */
- _writeInit: (TypedStream*)aStream;
- _readInit: (TypedStream*)aStream;
- _writeContents: (TypedStream*)aStream;
- _readContents: (TypedStream*)aStream;
/* The Coding versions of the above */
- (void) _encodeCollectionWithCoder: (id <Encoding>)aCoder;
- _initCollectionWithCoder: (id <Decoding>)aCoder;
- (void) _encodeContentsWithCoder: (id <Encoding>)aCoder;
- (void) _decodeContentsWithCoder: (id <Decoding>)aCoder;
@end
@interface Collection (DeallocationHelpers)
/* Empty the internals of a collection after the contents have
already been released. */
- _empty;
/* Deallocate the internals of a collection after the contents
have already been released. */
- (void) _collectionDealloc;
@end
/* To be used inside methods for getting the element comparison function.
This macro could be redefined when the comparison function is an
instance variable or is fixed.
I'm wondering if I should put _comparison_function back as an instance
variable in Collection. */
#define COMPARISON_FUNCTION [self comparisonFunction]
/* Use this for comparing elements in your implementation. */
#define COMPARE_ELEMENTS(ELT1, ELT2) \
((*COMPARISON_FUNCTION)(ELT1, ELT2))
#define ELEMENTS_EQUAL(ELT1, ELT2) \
(COMPARE_ELEMENTS(ELT1, ELT2) == 0)
#define ENCODING_IS_OBJECT(ENCODING) \
((*(ENCODING) == _C_ID) || (*(ENCODING) == _C_CLASS))
/* To be used inside a method for determining if the contents are objects */
#define CONTAINS_OBJECTS \
(ENCODING_IS_OBJECT([self contentType]))
/* Used inside a method for sending "-retain" if necessary */
#define RETAIN_ELT(ELT) \
if (CONTAINS_OBJECTS) [ELT.id_u retain]
/* Used inside a method for sending "-release" if necessary */
#define RELEASE_ELT(ELT) \
if (CONTAINS_OBJECTS) [ELT.id_u release]
/* Used inside a method for sending "-autorelease" if necessary */
#define AUTORELEASE_ELT(ELT) \
((CONTAINS_OBJECTS) ? ((elt)[ELT.id_u autorelease]) : ELT)
/* Error Handling */
#define RETURN_BY_CALLING_EXCEPTION_FUNCTION(FUNC) \
return (*FUNC)(__builtin_apply_args())
/* To be used inside a method for making sure the contents are objects.
typeof(DEFAULT_ERROR_RETURN) must be the same type as the method
returns. */
#define CHECK_CONTAINS_OBJECTS_ERROR() \
({if (!(CONTAINS_OBJECTS)) \
{ \
[self error:"in %s, requires object contents", sel_get_name(_cmd)]; \
}})
/* To be used inside a method whenever a particular element isn't found */
#define ELEMENT_NOT_FOUND_ERROR(AN_ELEMENT) \
([self error:"in %s, element not found.", sel_get_name(_cmd)])
/* To be used inside a method whenever there is no element matching the
needed criteria */
#define NO_ELEMENT_FOUND_ERROR() \
([self error:"in %s, no element found.", sel_get_name(_cmd)])
#endif /* __CollectionPrivate_h_INCLUDE_GNU */
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