ObjFW  Check-in [d101b6f8b4]

		     length: (size_t)length
{
	if (_fd == -1 || _atEndOfStream || write(_fd, buffer, length) < length)
		@throw [OFWriteFailedException exceptionWithStream: self
						   requestedLength: length];
}

- (void)lowlevelSeekToOffset: (off_t)offset
		      whence: (int)whence
- (off_t)lowlevelSeekToOffset: (off_t)offset
		       whence: (int)whence
{
	if (lseek(_fd, offset, whence) == -1)
	off_t ret = lseek(_fd, offset, whence);

	if (ret == -1)
		@throw [OFSeekFailedException exceptionWithStream: self
							   offset: offset
							   whence: whence];

	return ret;
}

- (int)fileDescriptorForReading
{
	return _fd;
}

 * @param whence From where to seek.@n
 *		 Possible values are:
 *		 Value    | Description
 *		 ---------|---------------------------------------
 *		 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
 * @return The new offset form the start of the file
 */
- (void)seekToOffset: (off_t)offset
	      whence: (int)whence;
- (off_t)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.@n
 *		 Possible values are:
 *		 Value    | Description
 *		 ---------|---------------------------------------
 *		 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
 * @return The new offset from the start of the file
 */
- (void)lowlevelSeekToOffset: (off_t)offset
		      whence: (int)whence;
- (off_t)lowlevelSeekToOffset: (off_t)offset
		       whence: (int)whence;
@end

 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>

#import "OFSeekableStream.h"

@implementation OFSeekableStream
- (void)lowlevelSeekToOffset: (off_t)offset
		      whence: (int)whence
- (off_t)lowlevelSeekToOffset: (off_t)offset
		       whence: (int)whence
{
	[self doesNotRecognizeSelector: _cmd];
	abort();
}

- (void)seekToOffset: (off_t)offset
	      whence: (int)whence
- (off_t)seekToOffset: (off_t)offset
	       whence: (int)whence
{
	if (whence == SEEK_CUR)
		offset -= _readBufferLength;

	[self lowlevelSeekToOffset: offset
			    whence: whence];
	offset = [self lowlevelSeekToOffset: offset
				     whence: whence];

	[self freeMemory: _readBuffer];
	_readBuffer = NULL;
	_readBufferLength = 0;
}

	return offset;
}
@end