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NCBI C++ ToolKit: src/util/compress/api/stream.cpp Source File

streamsize in_bufsize,

streamsize out_bufsize)

: m_Processor(processor),

m_NeedDelete(need_delete), m_State(eDone)

(stream, read_sp, write_sp, ownership);

:

(0), m_Stream(0), m_StreamBuf(0),

m_Reader(0), m_Writer(0), m_Ownership(0)

setstate(badbit | eofbit);

setstate(stream.rdstate());

& status,

& description)

status =

->GetErrorCode();

description =

->GetErrorDescription();

* ptr = (

*)

;

ptr - (

*)

;

* ptr = (

*)

;

ptr - (

*)

;

* ptr = (

*)

;

ptr - (

*)

;

* ptr = (

*)

;

ptr - (

*)

;

* in_buf,

in_len,

* out_buf,

out_size,

=

(in_len, out_size);

memcpy(out_buf, in_buf,

);

*in_avail = in_len -

;

static void DLIST_NAME() init(DLIST_LIST_TYPE *list)

CT_CHAR_TYPE * m_OutBuf

Buffer of processed data.

CCompressionStreambuf * m_StreamBuf

Stream buffer.

CCompressionStreamProcessor * m_Writer

Write processor.

bool x_GetError(CCompressionStream::EDirection dir, int &status, string &description)

Get error code and description of last compressor/decompressor stream operation.

CCompressionStreamProcessor * m_Reader

Read processor.

TOwnership m_Ownership

Bitwise OR of EOwnership.

virtual ~CTransparentProcessor(void)

EState m_State

Stream processor state.

CCompressionStreamProcessor(CCompressionProcessor *processor, EDeleteProcessor need_delete=eNoDelete, streamsize in_bufsize=kCompressionDefaultBufSize, streamsize out_bufsize=kCompressionDefaultBufSize)

Constructor.

size_t Write(const void *buf, size_t len)

Auxiliary method to write into stream.

EDeleteProcessor

If to delete the used compression processor in the destructor.

virtual EStatus Flush(char *out_buf, size_t out_size, size_t *out_avail)

Flush compressed/decompressed data from the output buffer.

size_t Write(const void *buf, size_t len)

Auxiliary method to write into stream.

virtual EStatus End(int abandon=0)

Free all dynamically allocated data structures.

size_t x_GetProcessedSize(CCompressionStream::EDirection dir)

Return number of processed bytes.

CT_CHAR_TYPE * m_Begin

Begin and end of the pre/post.

CCompressionProcessor::EStatus x_GetStatus(CCompressionStream::EDirection dir)

Get status of last compression/decompression stream operation.

CCompressionStream(void)

Default constructor.

void Create(CNcbiIos &stream, CCompressionStreamProcessor *read_sp, CCompressionStreamProcessor *write_sp, TOwnership ownership=0)

Create stream with specific characteristics later, not necessary in the constructor.

CNcbiIos * m_Stream

Underlying stream.

void Init(void)

(Re)Initialize stream processor.

int Finalize(CCompressionStream::EDirection dir=CCompressionStream::eReadWrite)

virtual void Finalize(CCompressionStream::EDirection dir=CCompressionStream::eReadWrite)

Finalize stream's compression/decompression process for read/write.

CCompressionProcessor::EStatus m_LastStatus

Last compressor status.

virtual ~CCompressionStreamProcessor(void)

Destructor.

CCompressionProcessor * m_Processor

(De)compression processor.

virtual EStatus Finish(char *out_buf, size_t out_size, size_t *out_avail)

Finish the compression/decompression process.

virtual EStatus Process(const char *in_buf, size_t in_len, char *out_buf, size_t out_size, size_t *in_avail, size_t *out_avail)

Compress/decompress as much data as possible, and stops when the input buffer becomes empty or the ou...

size_t Read(void *buf, size_t len)

Auxiliary method to read from stream.

virtual EStatus Init(void)

Initialize the internal stream state for compression/decompression.

EDeleteProcessor m_NeedDelete

m_Processor auto-deleting flag.

EDirection

Stream processing direction.

CT_CHAR_TYPE * m_InBuf

Buffer of unprocessed data.

size_t x_GetOutputSize(CCompressionStream::EDirection dir)

Return number of output bytes.

size_t Read(void *buf, size_t len)

Auxiliary method to read from stream.

int TOwnership

Bitwise OR of EOwnership.

virtual ~CCompressionStream(void)

Destructor.

CT_CHAR_TYPE * m_End

processed data in the buffer.

@ eDone

End() done, processor cannot process data.

@ eInit

Init() is done, but no data to process.

@ eDelete

Do delete processor object.

@ eRead

Reading from stream.

@ fOwnReader

Delete the reader.

@ fOwnWriter

Delete the writer.

@ fOwnStream

Delete the underlying I/O stream.

void IncreaseProcessedSize(size_t n_bytes)

void IncreaseOutputSize(size_t n_bytes)

size_t GetOutputSize(void)

void SetBusy(bool busy=true)

Set/unset compressor busy flag.

bool IsBusy(void) const

Return compressor's busy flag.

const streamsize kCompressionDefaultBufSize

Default compression I/O stream buffer size.

EStatus

Type of the result of all basic functions.

#define COMPRESS_HANDLE_EXCEPTIONS(subcode, message)

Macro to catch and handle exceptions (from streams in the destructor)

size_t GetProcessedSize(void)

virtual EStatus End(int abandon=0)=0

Free all dynamically allocated data structures.

virtual EStatus Init(void)=0

Initialize the internal stream state for compression/decompression.

@ eStatus_Overflow

Output buffer overflow - not enough output space.

@ eStatus_EndOfData

Special case of eStatus_Success.

@ eStatus_Unknown

Special value. Status is undefined.

@ eStatus_Success

Everything is fine, no errors occurred.

#define END_NCBI_SCOPE

End previously defined NCBI scope.

#define BEGIN_NCBI_SCOPE

Define ncbi namespace.

IO_PREFIX::ios CNcbiIos

Portable alias for ios.

Definition of all error codes used in util (xutil.lib).

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