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#include <sys/types.h>
#import "OFStream.h"
/*!
* @brief A stream that supports seeking.
*
* @note If you want to subclass this, override lowlevelSeekToOffset:,
* lowlevelSeekForwardWithOffset: and lowlevelSeekToOffsetRelativeToEnd:,
* but nothing else, as they do the actual work. OFSeekableStream uses
* those and makes them work together with the caching of OFStream.
* If you override these methods without the lowlevel prefix, you
* <i>will</i> break caching, get broken results and seek to the wrong
* position!
*/
@interface OFSeekableStream: OFStream
/*!
* @brief Seeks to the specified absolute offset.
*
* @param offset The offset in bytes
*/
- (void)seekToOffset: (off_t)offset;
/*!
* @brief Seeks to the specified offset, relative to the current location.
*
* @param offset The offset relative to the current location
* @return The absolute offset
- (off_t)seekForwardWithOffset: (off_t)offset;
/*!
* @brief Seeks to the specified offset, relative to the end of the stream.
*
* @param offset The offset relative to the end of the stream
* @return The absolute offset
*/
- (off_t)seekToOffsetRelativeToEnd: (off_t)offset;
/*!
* @brief Seek the stream on the lowlevel.
*
* @warning Do not call this directly!
*
* Override this with this method with your actual seek implementation when
* subclassing!
*
* @param offset The offset to seek to
*/
- (void)lowlevelSeekToOffset: (off_t)offset;
/*!
* @brief Seek the stream on the lowlevel.
*
* @warning Do not call this directly!
*
* Override this with this method with your actual seek implementation when
* subclassing!
*
* @param offset The offset to seek forward to
*/
- (off_t)lowlevelSeekForwardWithOffset: (off_t)offset;
/*!
* @brief Seek the stream on the lowlevel.
*
* @warning Do not call this directly!
*
* Override this with this method with your actual seek implementation when
* subclassing!
*
* @param offset The offset to seek to, relative to the end
- (off_t)lowlevelSeekToOffsetRelativeToEnd: (off_t)offset;
@end
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#include <sys/types.h>
#import "OFStream.h"
/*!
* @brief A stream that supports seeking.
*
* @note If you want to subclass this, override
* @ref lowlevelSeekToOffset:whence:. OFSeekableStream uses this method
* and makes it work together with the caching of OFStream. If you
* override this methods without the lowlevel prefix, you <i>will</i>
* break caching, get broken results and seek to the wrong position!
*/
@interface OFSeekableStream: OFStream
/*!
* @brief Seeks to the specified absolute offset.
*
* @param offset The offset in bytes
* @param whence From where to seek. Possible values are:
* * SEEK_SET: Seek to the specified byte.
* * SEEK_CUR: Seek to the current location + offset.
* * SEEK_END: Seek to the end of the stream + offset.
*/
- (void)seekToOffset: (off_t)offset
whence: (int)whence;
/*!
* @brief Seek the stream on the lowlevel.
*
* @warning Do not call this directly!
*
* Override this with this method with your actual seek implementation when
* subclassing!
*
* @param offset The offset to seek to
* @param whence From where to seek. Possible values are:
* * SEEK_SET: Seek to the specified byte.
* * SEEK_CUR: Seek to the current location + offset.
* * SEEK_END: Seek to the end of the stream + offset.
*/
- (void)lowlevelSeekToOffset: (off_t)offset
whence: (int)whence;
@end
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