DCMTK
Version 3.6.9
OFFIS DICOM Toolkit
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base class for output streams. More...
Public Member Functions | |
virtual | ~DcmOutputStream () |
destructor | |
virtual OFBool | good () const |
returns the status of the stream. More... | |
virtual OFCondition | status () const |
returns the status of the consumer as an OFCondition object. More... | |
virtual OFBool | isFlushed () const |
returns true if the stream is flushed, i.e. More... | |
virtual offile_off_t | avail () const |
returns the minimum number of bytes that can be written with the next call to write(). More... | |
virtual offile_off_t | write (const void *buf, offile_off_t buflen) |
processes as many bytes as possible from the given input block. More... | |
virtual void | flush () |
instructs the stream to flush its internal content until either the stream becomes "flushed" or I/O suspension occurs. More... | |
virtual offile_off_t | tell () const |
returns the total number of bytes written to the stream so far More... | |
virtual OFCondition | installCompressionFilter (E_StreamCompression filterType) |
installs a compression filter for the given stream compression type, which should be neither ESC_none nor ESC_unsupported. More... | |
Protected Member Functions | |
DcmOutputStream (DcmConsumer *initial) | |
protected constructor, to be called from derived class constructor More... | |
Private Member Functions | |
DcmOutputStream (const DcmOutputStream &) | |
private unimplemented copy constructor | |
DcmOutputStream & | operator= (const DcmOutputStream &) |
private unimplemented copy assignment operator | |
Private Attributes | |
DcmConsumer * | current_ |
pointer to first node in filter chain | |
DcmOutputFilter * | compressionFilter_ |
pointer to compression filter, NULL if no compression | |
offile_off_t | tell_ |
counter for number of bytes written so far | |
base class for output streams.
This class cannot be instantiated since the constructor is protected.
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protected |
protected constructor, to be called from derived class constructor
initial | initial pointer to first node in filter chain The pointer is not dereferenced in the constructor, so the object pointed to may be initialized later in the subclass constructor. |
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returns the minimum number of bytes that can be written with the next call to write().
The DcmObject write methods rely on avail to return a value > 0 if there is no I/O suspension since certain data such as tag and length are only written "en bloc", i.e. all or nothing.
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returns the status of the stream.
Unless the status is good, the stream will not permit any operation.
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installs a compression filter for the given stream compression type, which should be neither ESC_none nor ESC_unsupported.
Once a compression filter is active, it cannot be deactivated or replaced during the lifetime of the stream.
filterType | type of compression filter |
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returns true if the stream is flushed, i.e.
has no more data pending in it's internal state that needs to be flushed before the stream is closed.
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returns the status of the consumer as an OFCondition object.
Unless the status is good, the consumer will not permit any operation.
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returns the total number of bytes written to the stream so far
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processes as many bytes as possible from the given input block.
buf | pointer to memory block, must not be NULL |
buflen | length of memory block |