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#import "OFStream.h"
#import "OFSeekableStream.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
#import "OFNotImplementedException.h"
#import "OFNotOpenException.h"
#import "OFTruncatedDataException.h"
@interface OFLHAArchive_FileReadStream: OFStream <OFReadyForReadingObserving>
{
OFLHAArchiveEntry *_entry;
OF_KINDOF(OFStream *) _stream;
uint32_t _toRead;
bool _atEndOfStream;
}
- (instancetype)of_initWithStream: (OFStream *)stream
entry: (OFLHAArchiveEntry *)entry;
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[self close];
[super dealloc];
}
- (OFLHAArchiveEntry *)nextEntry
{
OFLHAArchiveEntry *entry;
uint8_t headerSize;
char header[21];
size_t headerLen;
[_lastEntry release];
_lastEntry = nil;
[_lastReturnedStream of_skip];
[_lastReturnedStream close];
[_lastReturnedStream release];
_lastReturnedStream = nil;
for (headerLen = 0; headerLen < 21;) {
if ([_stream isAtEndOfStream])
return nil;
if ([_stream isAtEndOfStream]) {
if (headerLen == 0)
return nil;
if ([_stream readIntoBuffer: &headerSize
length: 1] == 0)
return nil;
if (headerLen == 1 && header[0] == 0)
return nil;
@throw [OFTruncatedDataException exception];
}
if (headerSize == 0)
return nil;
entry = [[[OFLHAArchiveEntry alloc]
of_initWithHeaderSize: headerSize
stream: _stream
encoding: _encoding] autorelease];
headerLen += [_stream readIntoBuffer: header + headerLen
length: 21 - headerLen];
}
_lastEntry = [[OFLHAArchiveEntry alloc]
of_initWithHeader: header
stream: _stream
encoding: _encoding];
_lastReturnedStream = [[OFLHAArchive_FileReadStream alloc]
of_initWithStream: _stream
entry: entry];
entry: _lastEntry];
return entry;
return [[_lastEntry copy] autorelease];
}
- (OFStream <OFReadyForReadingObserving> *)streamForReadingCurrentEntry
{
OFString *method;
if (_lastReturnedStream == nil)
@throw [OFInvalidArgumentException exception];
method = [_lastEntry method];
if (![method isEqual: @"-lh0-"] && ![method isEqual: @"-lhd-"] &&
![method isEqual: @"-lz4-"])
@throw [OFNotImplementedException
exceptionWithSelector: _cmd
object: self];
return [[_lastReturnedStream retain] autorelease];
}
- (void)close
{
if (_stream == nil)
return;
[_lastEntry release];
_lastEntry = nil;
[_lastReturnedStream close];
[_lastReturnedStream release];
_lastReturnedStream = nil;
[_stream release];
_stream = nil;
}
@end
@implementation OFLHAArchive_FileReadStream
- (instancetype)of_initWithStream: (OFStream *)stream
entry: (OFLHAArchiveEntry *)entry
{
self = [super init];
@try {
OFString *method = [entry method];
if (![method isEqual: @"-lh0-"] && ![method isEqual: @"-lhd-"])
@throw [OFNotImplementedException
exceptionWithSelector: _cmd
object: self];
_entry = [entry copy];
_stream = [stream retain];
/*
* Use the compressed size, as that is the number of bytes we
* need to skip for the next entry and is equal for
* uncompressed files, the only thing supported so far.
*/
_toRead = [entry uncompressedSize];
_toRead = [entry compressedSize];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[self close];
[_entry release];
[super dealloc];
}
- (size_t)lowlevelReadIntoBuffer: (void *)buffer
length: (size_t)length
{
size_t ret;
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