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# define __STDC_CONSTANT_MACROS
#endif
#include <sys/types.h>
#import "OFStream.h"
/**
* \brief A stream that supports seeking.
/*!
* @brief A stream that supports seeking.
*
* \note If you want to subclass this, override lowlevelSeekToOffset:,
* @note If you want to subclass this, override lowlevelSeekToOffset:,
* lowlevelSeekForwardWithOffset: and lowlevelSeekToOffsetRelativeToEnd:,
* but nothing else. Those are not defined in the headers, but 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.
/*!
* @brief Seeks to the specified absolute offset.
*
* \param offset The offset in bytes
* @param offset The offset in bytes
*/
- (void)seekToOffset: (off_t)offset;
/**
* \brief Seeks to the specified offset, relative to the current location.
/*!
* @brief Seeks to the specified offset, relative to the current location.
*
* \param offset The offset relative to the current location
* \return The absolute offset
* @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.
/*!
* @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
* @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.
/*!
* @brief Seek the stream on the lowlevel.
*
* \warning Do not call this directly!
* @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 offset The offset to seek to
*/
- (void)lowlevelSeekToOffset: (off_t)offset;
/**
* \brief Seek the stream on the lowlevel.
/*!
* @brief Seek the stream on the lowlevel.
*
* \warning Do not call this directly!
* @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
* @param offset The offset to seek forward to
*/
- (off_t)lowlevelSeekForwardWithOffset: (off_t)offset;
/**
* \brief Seek the stream on the lowlevel.
/*!
* @brief Seek the stream on the lowlevel.
*
* \warning Do not call this directly!
* @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
* @param offset The offset to seek to, relative to the end
*/
- (off_t)lowlevelSeekToOffsetRelativeToEnd: (off_t)offset;
@end
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