@@ -33,10 +33,16 @@
 #import "OFInvalidFormatException.h"
 #import "OFNotOpenException.h"
 #import "OFOutOfRangeException.h"
 #import "OFTruncatedDataException.h"
 #import "OFWriteFailedException.h"
+
+enum {
+	modeRead,
+	modeWrite,
+	modeAppend
+};
 
 OF_DIRECT_MEMBERS
 @interface OFTarArchiveFileReadStream: OFStream <OFReadyForReadingObserving>
 {
 	OFTarArchive *_archive;
@@ -95,19 +101,19 @@
 
 	@try {
 		_stream = [stream retain];
 
 		if ([mode isEqual: @"r"])
-			_mode = OFTarArchiveModeRead;
+			_mode = modeRead;
 		else if ([mode isEqual: @"w"])
-			_mode = OFTarArchiveModeWrite;
+			_mode = modeWrite;
 		else if ([mode isEqual: @"a"])
-			_mode = OFTarArchiveModeAppend;
+			_mode = modeAppend;
 		else
 			@throw [OFInvalidArgumentException exception];
 
-		if (_mode == OFTarArchiveModeAppend) {
+		if (_mode == modeAppend) {
 			uint32_t buffer[1024 / sizeof(uint32_t)];
 			bool empty = true;
 
 			if (![_stream isKindOfClass: [OFSeekableStream class]])
 				@throw [OFInvalidArgumentException exception];
@@ -170,11 +176,11 @@
 - (OFTarArchiveEntry *)nextEntry
 {
 	uint32_t buffer[512 / sizeof(uint32_t)];
 	bool empty = true;
 
-	if (_mode != OFTarArchiveModeRead)
+	if (_mode != modeRead)
 		@throw [OFInvalidArgumentException exception];
 
 	if (_currentEntry != nil && _lastReturnedStream == nil) {
 		/*
 		 * No read stream was created since the last call to
@@ -225,11 +231,11 @@
 	return _currentEntry;
 }
 
 - (OFStream *)streamForReadingCurrentEntry
 {
-	if (_mode != OFTarArchiveModeRead)
+	if (_mode != modeRead)
 		@throw [OFInvalidArgumentException exception];
 
 	if (_currentEntry == nil)
 		@throw [OFInvalidArgumentException exception];
 
@@ -243,11 +249,11 @@
 	return _lastReturnedStream;
 }
 
 - (OFStream *)streamForWritingEntry: (OFTarArchiveEntry *)entry
 {
-	if (_mode != OFTarArchiveModeWrite && _mode != OFTarArchiveModeAppend)
+	if (_mode != modeWrite && _mode != modeAppend)
 		@throw [OFInvalidArgumentException exception];
 
 	@try {
 		[_lastReturnedStream close];
 	} @catch (OFNotOpenException *e) {
@@ -275,11 +281,11 @@
 	} @catch (OFNotOpenException *e) {
 		/* Might have already been closed by the user - that's fine. */
 	}
 	_lastReturnedStream = nil;
 
-	if (_mode == OFTarArchiveModeWrite || _mode == OFTarArchiveModeAppend) {
+	if (_mode == modeWrite || _mode == modeAppend) {
 		char buffer[1024];
 		memset(buffer, '\0', 1024);
 		[_stream writeBuffer: buffer length: 1024];
 	}