OFSeekableStream.h

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/*
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3.0 only,
 * as published by the Free Software Foundation.
 *
 * This program 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 Lesser General Public License
 * version 3.0 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3.0 along with this program. If not, see
 * <https://www.gnu.org/licenses/>.
 */
 
#ifndef __STDC_LIMIT_MACROS
# define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
# define __STDC_CONSTANT_MACROS
#endif
 
#include "objfw-defs.h"
 
#ifdef OF_HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
 
#import "OFStream.h"
 
OF_ASSUME_NONNULL_BEGIN
 
#if defined(OF_WINDOWS)
typedef __int64 OFStreamOffset;
#elif defined(OF_ANDROID)
typedef long long OFStreamOffset;
#elif defined(OF_MORPHOS)
typedef long long OFStreamOffset;
#elif defined(OF_HAVE_OFF64_T)
typedef off64_t OFStreamOffset;
#else
typedef off_t OFStreamOffset;
#endif
 
typedef enum {
    OFSeekSet,
    OFSeekCurrent,
    OFSeekEnd
} OFSeekWhence;
 
@interface OFSeekableStream: OFStream
{
    OF_RESERVE_IVARS(OFSeekableStream, 4)
}
 
- (OFStreamOffset)seekToOffset: (OFStreamOffset)offset
            whence: (OFSeekWhence)whence;
 
- (OFStreamOffset)lowlevelSeekToOffset: (OFStreamOffset)offset
                whence: (OFSeekWhence)whence;
@end
 
OF_ASSUME_NONNULL_END