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_mode = OF_TAR_ARCHIVE_MODE_WRITE;
else if ([mode isEqual: @"a"])
_mode = OF_TAR_ARCHIVE_MODE_APPEND;
else
@throw [OFInvalidArgumentException exception];
if (_mode == OF_TAR_ARCHIVE_MODE_APPEND) {
union {
char c[1024];
uint32_t u32[1024 / sizeof(uint32_t)];
} buffer;
bool empty = true;
if (![_stream isKindOfClass: [OFSeekableStream class]])
@throw [OFInvalidArgumentException exception];
[(OFSeekableStream *)_stream seekToOffset: -1024
whence: SEEK_END];
[_stream readIntoBuffer: buffer.c
exactLength: 1024];
for (size_t i = 0; i < 1024 / sizeof(uint32_t); i++)
if (buffer.u32[i] != 0)
empty = false;
if (!empty)
@throw [OFInvalidFormatException exception];
[(OFSeekableStream *)stream seekToOffset: -1024
whence: SEEK_END];
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_mode = OF_TAR_ARCHIVE_MODE_WRITE;
else if ([mode isEqual: @"a"])
_mode = OF_TAR_ARCHIVE_MODE_APPEND;
else
@throw [OFInvalidArgumentException exception];
if (_mode == OF_TAR_ARCHIVE_MODE_APPEND) {
uint32_t buffer[1024 / sizeof(uint32_t)];
bool empty = true;
if (![_stream isKindOfClass: [OFSeekableStream class]])
@throw [OFInvalidArgumentException exception];
[(OFSeekableStream *)_stream seekToOffset: -1024
whence: SEEK_END];
[_stream readIntoBuffer: buffer
exactLength: 1024];
for (size_t i = 0; i < 1024 / sizeof(uint32_t); i++)
if (buffer[i] != 0)
empty = false;
if (!empty)
@throw [OFInvalidFormatException exception];
[(OFSeekableStream *)stream seekToOffset: -1024
whence: SEEK_END];
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[super dealloc];
}
- (OFTarArchiveEntry *)nextEntry
{
OFTarArchiveEntry *entry;
union {
unsigned char c[512];
uint32_t u32[512 / sizeof(uint32_t)];
} buffer;
bool empty = true;
if (_mode != OF_TAR_ARCHIVE_MODE_READ)
@throw [OFInvalidArgumentException exception];
[(OFTarArchiveFileReadStream *)_lastReturnedStream of_skip];
@try {
[_lastReturnedStream close];
} @catch (OFNotOpenException *e) {
/* Might have already been closed by the user - that's fine. */
}
[_lastReturnedStream release];
_lastReturnedStream = nil;
if (_stream.atEndOfStream)
return nil;
[_stream readIntoBuffer: buffer.c
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer.u32[i] != 0)
empty = false;
if (empty) {
[_stream readIntoBuffer: buffer.c
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer.u32[i] != 0)
@throw [OFInvalidFormatException exception];
return nil;
}
entry = [[[OFTarArchiveEntry alloc]
of_initWithHeader: buffer.c
encoding: _encoding] autorelease];
_lastReturnedStream = [[OFTarArchiveFileReadStream alloc]
of_initWithStream: _stream
entry: entry];
return entry;
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[super dealloc];
}
- (OFTarArchiveEntry *)nextEntry
{
OFTarArchiveEntry *entry;
uint32_t buffer[512 / sizeof(uint32_t)];
bool empty = true;
if (_mode != OF_TAR_ARCHIVE_MODE_READ)
@throw [OFInvalidArgumentException exception];
[(OFTarArchiveFileReadStream *)_lastReturnedStream of_skip];
@try {
[_lastReturnedStream close];
} @catch (OFNotOpenException *e) {
/* Might have already been closed by the user - that's fine. */
}
[_lastReturnedStream release];
_lastReturnedStream = nil;
if (_stream.atEndOfStream)
return nil;
[_stream readIntoBuffer: buffer
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer[i] != 0)
empty = false;
if (empty) {
[_stream readIntoBuffer: buffer
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer[i] != 0)
@throw [OFInvalidFormatException exception];
return nil;
}
entry = [[[OFTarArchiveEntry alloc]
of_initWithHeader: (unsigned char *)buffer
encoding: _encoding] autorelease];
_lastReturnedStream = [[OFTarArchiveFileReadStream alloc]
of_initWithStream: _stream
entry: entry];
return entry;
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