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StreamBuffer Class Reference

The stream buffer is a small object collecting object data. More...

`#include <GaudiKernel/StreamBuffer.h>`

Collaboration diagram for StreamBuffer:
[legend]

## Classes
class | ContainedLink
| Definition of the contained link set. More...
class | DataIO
| A small base class to handle generic data streaming. More...
class | IdentifiedLink
| Definition of the contained link set. More...
class | Istream
| Reader for standard input streams. More...
class | Ostream
| Writer for standard output streams. More...

## Public Types
enum | Mode { UNINITIALIZED, READING, WRITING }
| Streamer mode. More...
enum | SwapAction { SINGLE_BYTE, SWAP, NOSWAP }
| Data Sawp actions. More...
enum | State { INVALID = -1, VALID }
| Link state defintions. More...
typedef std::vector< ContainedLink > | ContainedLinks
typedef std::vector< IdentifiedLink > | IdentifiedLinks
| Definition of the identifiable link set. More...
typedef void(* | AnalyzeFunction) (const void *data, int siz, const std::type_info &type)
| Definition of the buffer analyzer. More...

## Public Member Functions
| StreamBuffer (bool do_swap=true)
| Standard constructor. More...
virtual | ~StreamBuffer ()
| Standard destructor. More...
const char * | data () const
| Read access to data buffer. More...
char * | data ()
| write access to data buffer More...
void | erase ()
| Reset the buffer. More...
char * | adopt () const
| Remove the data buffer and pass it to client. It's the client responsability to free the memory. More...
void | reserve (long len)
| Reserve buffer space; Default: 16 k buffer size. More...
void | extend (long len)
| Extend the buffer. More...
long | size () const
| Total buffer size. More...
ContainedLinks & | containedLinks ()
| Access to contained links. More...
const ContainedLinks & | containedLinks () const
| CONST Access to contained links. More...
IdentifiedLinks & | identifiedLinks ()
| Access to identified links. More...
const IdentifiedLinks & | identifiedLinks () const
| CONST Access to identified links. More...
void | setMode (Mode m)
| Set mode of the stream and allocate buffer. More...
bool | isReading () const
| Get stream buffer state. More...
bool | isWriting () const
| Get stream buffer state. More...
long | buffPointer () const
| Retrieve current buffer pointer. More...
void | setBuffPointer (long ptr)
| Retrieve current buffer pointer. More...
void | setAnalyzer (AnalyzeFunction fun=nullptr)
| Enable user analysis function. More...
void | swapToBuffer (const void *source, int siz)
| Swap buffers: int, long, short, float and double. More...
void | swapFromBuffer (void *target, int siz)
| Swap buffers: int, long, short, float and double. More...
StreamBuffer & | writeBytes (const char *str, long len)
| Write string to output stream. More...
void | getIdentifiedLink (DataObject *&pObject, long &hint)
void | addIdentifiedLink (const DataObject *pObject, long hint)
void | getContainedLink (ContainedObject *&pObject, long &hint, long &link)
void | addContainedLink (const ContainedObject *pObject, long hint, long link)
StreamBuffer & | operator<< (longlong data)
| Output Streamer. More...
StreamBuffer & | operator>> (longlong &data)
| Input Streamer. More...
StreamBuffer & | operator<< (int data)
| Output Streamer. More...
StreamBuffer & | operator>> (int &data)
| Input Streamer. More...
StreamBuffer & | operator<< (unsigned int data)
| Output Streamer. More...
StreamBuffer & | operator>> (unsigned int &data)
| Input Streamer. More...
StreamBuffer & | operator<< (long data)
| Output Streamer. More...
StreamBuffer & | operator>> (long &data)
| Input Streamer. More...
StreamBuffer & | operator<< (unsigned long data)
| Output Streamer. More...
StreamBuffer & | operator>> (unsigned long &data)
| Input Streamer. More...
StreamBuffer & | operator<< (short data)
| Output Streamer. More...
StreamBuffer & | operator>> (short &data)
| Input Streamer. More...
StreamBuffer & | operator<< (unsigned short data)
| Output Streamer. More...
StreamBuffer & | operator>> (unsigned short &data)
| Input Streamer. More...
StreamBuffer & | operator<< (char data)
| Output Streamer. More...
StreamBuffer & | operator>> (char &data)
| Input Streamer. More...
StreamBuffer & | operator<< (unsigned char data)
| Output Streamer. More...
StreamBuffer & | operator>> (unsigned char &data)
| Input Streamer. More...
StreamBuffer & | operator<< (float data)
| Output Streamer. More...
StreamBuffer & | operator>> (float &data)
| Input Streamer. More...
StreamBuffer & | operator<< (double data)
| Output Streamer. More...
StreamBuffer & | operator>> (double &data)
| Input Streamer. More...
StreamBuffer & | operator>> (char *data)
| Streamer to read strings in (char*) format. More...
StreamBuffer & | operator<< (const char *data)
| Streamer to write strings in (char*) format. More...
StreamBuffer & | operator>> (std::string &data)
| Streamer to read strings in (std::string) format. More...
StreamBuffer & | operator<< (const std::string &data)
| Streamer to write strings in (std::string) format. More...
template<class TYPE >
StreamBuffer & | operator>> (TYPE *&refpObject)
| Streamer to read links to contained or identified objects. More...
StreamBuffer & | operator<< (const ContainedObject *pObject)
| Streamer to write links to contained objects. More...
StreamBuffer & | operator<< (const DataObject *pObject)
| Streamer to write links to identified objects. More...
void | serialize (DataIO &ioObject)
| Serialize the buffer using an IO object. More...

## Protected Member Functions
SwapAction | swapBuffer (int siz) const
| Check for byte swapping. More...
template<class TYPE >
StreamBuffer & | getObjectPointer (const DataObject *, TYPE *&refpObject)
| Helper to distinguish between identified pointers and contained pointers. More...
template<class TYPE >
StreamBuffer & | getObjectPointer (const ContainedObject *, TYPE *&refpObject)
| Helper to distinguish between identified pointers and contained pointers. More...

## Protected Attributes
Mode | m_mode = UNINITIALIZED
| Boolean indicating wether the stream is in read or write mode. More...
long | m_pointer = 0
| Current buffer pointer. More...
long | m_length = 0
| Total buffer length. More...
char * | m_buffer = nullptr
| Pointer to heap buffer. More...
bool | m_swapEnabled = true
| Flag indicating swapping. More...
ContainedLinks | m_containedLinks
| Container with links to contained objects. More...
IdentifiedLinks | m_identifiedLinks
| Container with links to contained objects. More...
AnalyzeFunction | m_analyzer = nullptr
| Hook function for analysis of data to the stream. More...

## Friends
class | DataObject
| DataObject is friend. More...

## Detailed Description

The stream buffer is a small object collecting object data.

The basic idea behind the StreamBuffer is generic object conversion. The StreamBuffer acts as a byte stream (hence inheriting from a std::string: DP: this is not true anymore and it is not a bad thing in my opinion) and stores any information streamed to the buffer. Since the information must be represented in a generic way on the fly byte swapping is performed. However, not only primitive data can be stored in the buffer, but also pointers to DataObjects (symbolic links) and pointers to contained objects. Automatically during serialization the persistent references to the corresponding objects and containers must be stored. These objects are accessible from the StreamBuffer object.

"On the fly" data conversion to non persistent

Author
  M.Frank

Definition at line 41 of file StreamBuffer.h.

## Member Typedef Documentation

typedef void( * StreamBuffer::AnalyzeFunction) (const void *data, int siz, const std::type_info &type)

Definition of the buffer analyzer.

Definition at line 146 of file StreamBuffer.h.

typedef std::vector<ContainedLink> StreamBuffer::ContainedLinks

Definition at line 142 of file StreamBuffer.h.

typedef std::vector<IdentifiedLink> StreamBuffer::IdentifiedLinks

Definition of the identifiable link set.

Definition at line 144 of file StreamBuffer.h.

## Member Enumeration Documentation

enum StreamBuffer::Mode

Streamer mode.

Enumerator
UNINITIALIZED |
READING |
WRITING |

Definition at line 115 of file StreamBuffer.h.

115 { UNINITIALIZED, READING, WRITING };
StreamBuffer::READING
Definition: StreamBuffer.h:115
StreamBuffer::UNINITIALIZED
Definition: StreamBuffer.h:115
StreamBuffer::WRITING
Definition: StreamBuffer.h:115

enum StreamBuffer::State

Link state defintions.

Enumerator
INVALID |
VALID |

Definition at line 119 of file StreamBuffer.h.

119 { INVALID = -1, VALID };
StreamBuffer::VALID
Definition: StreamBuffer.h:119
StreamBuffer::INVALID
Definition: StreamBuffer.h:119

enum StreamBuffer::SwapAction

Data Sawp actions.

Enumerator
SINGLE_BYTE |
SWAP |
NOSWAP |

Definition at line 117 of file StreamBuffer.h.

117 { SINGLE_BYTE, SWAP, NOSWAP };
StreamBuffer::SWAP
Definition: StreamBuffer.h:117
StreamBuffer::SINGLE_BYTE
Definition: StreamBuffer.h:117
StreamBuffer::NOSWAP
Definition: StreamBuffer.h:117

## Constructor & Destructor Documentation

StreamBuffer::StreamBuffer | ( | bool | do_swap = `true` | ) |
| inline

Standard constructor.

Definition at line 205 of file StreamBuffer.h.

205 : m_swapEnabled( do_swap ) {}
StreamBuffer::m_swapEnabled
bool m_swapEnabled
Flag indicating swapping.
Definition: StreamBuffer.h:164

virtual StreamBuffer::~StreamBuffer | ( |  | ) |
| inline virtual

Standard destructor.

Definition at line 207 of file StreamBuffer.h.

207 { ::free( m_buffer ); }
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161

## Member Function Documentation

void StreamBuffer::addContainedLink | ( | const ContainedObject * | pObject,
|  | long | hint,
|  | long | link
| ) |  |
| inline

Definition at line 312 of file StreamBuffer.h.

313 {
314 m_containedLinks.push_back( ContainedLink( (ContainedObject*)pObject, hint, link ) );
315 }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167
std::vector::push_back
T push_back(T...args)
ContainedObject
All classes that their objects may be contained in an LHCb ObjectContainer (e.g.
Definition: ContainedObject.h:31

void StreamBuffer::addIdentifiedLink | ( | const DataObject * | pObject,
|  | long | hint
| ) |  |
| inline

Definition at line 299 of file StreamBuffer.h.

300 {
301 m_identifiedLinks.push_back( IdentifiedLink( (DataObject*)pObject, hint ) );
302 }
std::vector::push_back
T push_back(T...args)
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170
DataObject
A DataObject is the base class of any identifiable object on any data store.
Definition: DataObject.h:29

char* StreamBuffer::adopt | ( |  | ) | const
| inline

Remove the data buffer and pass it to client. It's the client responsability to free the memory.

Definition at line 215 of file StreamBuffer.h.

216 {
217 char* ptr = m_buffer;
218 m_containedLinks.erase( m_containedLinks.begin(), m_containedLinks.end() );
219 m_identifiedLinks.erase( m_identifiedLinks.begin(), m_identifiedLinks.end() );
220 m_buffer = NULL; // char *
221 m_pointer = 0; // long
222 m_length = 0; // long
223 return ptr;
224 }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167
StreamBuffer::m_length
long m_length
Total buffer length.
Definition: StreamBuffer.h:158
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
std::vector::end
T end(T...args)
std::vector::erase
T erase(T...args)
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155
std::vector::begin
T begin(T...args)
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170

long StreamBuffer::buffPointer | ( |  | ) | const
| inline

Retrieve current buffer pointer.

Definition at line 271 of file StreamBuffer.h.

271 { return m_pointer; }
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

ContainedLinks& StreamBuffer::containedLinks | ( |  | ) |
| inline

Access to contained links.

Definition at line 247 of file StreamBuffer.h.

247 { return m_containedLinks; }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167

const ContainedLinks& StreamBuffer::containedLinks | ( |  | ) | const
| inline

CONST Access to contained links.

Definition at line 249 of file StreamBuffer.h.

249 { return m_containedLinks; }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167

const char* StreamBuffer::data | ( |  | ) | const
| inline

Read access to data buffer.

Definition at line 209 of file StreamBuffer.h.

209 { return m_buffer; }
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161

char* StreamBuffer::data | ( |  | ) |
| inline

write access to data buffer

Definition at line 211 of file StreamBuffer.h.

211 { return m_buffer; }
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161

void StreamBuffer::erase | ( |  | ) |
| inline

Reset the buffer.

Definition at line 213 of file StreamBuffer.h.

213 { m_pointer = 0; }
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

void StreamBuffer::extend | ( | long | len | ) |
| inline

Extend the buffer.

Definition at line 234 of file StreamBuffer.h.

235 {
236 if ( len + m_pointer > m_length ) {
237 // We have to be a bit generous here in order not to run too often
238 // into ::realloc().
239 long new_len = ( m_length < 16384 ) ? 16384 : 2 * m_length;
240 if ( m_length < len ) new_len += len;
241 reserve( new_len );
242 }
243 }
StreamBuffer::m_length
long m_length
Total buffer length.
Definition: StreamBuffer.h:158
StreamBuffer::reserve
void reserve(long len)
Reserve buffer space; Default: 16 k buffer size.
Definition: StreamBuffer.h:226
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

void StreamBuffer::getContainedLink | ( | ContainedObject *& | pObject,
|  | long & | hint,
|  | long & | link
| ) |  |
| inline

Definition at line 304 of file StreamBuffer.h.

305 {
306 ContainedLink& l = m_containedLinks.back();
307 pObject = l.first;
308 hint = l.second;
309 link = l.third;
310 m_containedLinks.pop_back();
311 }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167
std::vector::pop_back
T pop_back(T...args)
gaudirun.l
dictionary l
Definition: gaudirun.py:440
std::vector::back
T back(T...args)

void StreamBuffer::getIdentifiedLink | ( | DataObject *& | pObject,
|  | long & | hint
| ) |  |
| inline

Definition at line 292 of file StreamBuffer.h.

293 {
294 IdentifiedLink& l = m_identifiedLinks.back();
295 pObject = l.first;
296 hint = l.second;
297 m_identifiedLinks.pop_back();
298 }
std::vector::pop_back
T pop_back(T...args)
gaudirun.l
dictionary l
Definition: gaudirun.py:440
std::vector::back
T back(T...args)
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170
template<class TYPE >

StreamBuffer& StreamBuffer::getObjectPointer | ( | const DataObject * | ,
|  | TYPE *& | refpObject
| ) |  |
| inline protected

Helper to distinguish between identified pointers and contained pointers.

This entry resolves identified pointers (= Pointers to DataObject instances.)

Definition at line 182 of file StreamBuffer.h.

183 {
184 IdentifiedLink& link = m_identifiedLinks.back();
185 DataObject* pObj = link.first;
186 m_identifiedLinks.pop_back();
187 refpObject = dynamic_cast<TYPE*>( pObj );
188 return *this;
189 }
std::vector::pop_back
T pop_back(T...args)
std::vector::back
T back(T...args)
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170
DataObject
A DataObject is the base class of any identifiable object on any data store.
Definition: DataObject.h:29
template<class TYPE >

StreamBuffer& StreamBuffer::getObjectPointer | ( | const ContainedObject * | ,
|  | TYPE *& | refpObject
| ) |  |
| inline protected

Helper to distinguish between identified pointers and contained pointers.

This entry resolves contained pointers (= Pointers to ContainedObject instances.)

Definition at line 194 of file StreamBuffer.h.

195 {
196 ContainedLink& link = m_containedLinks.back();
197 ContainedObject* pObj = link.first;
198 m_containedLinks.pop_back();
199 refpObject = dynamic_cast<TYPE*>( pObj );
200 return *this;
201 }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167
std::vector::pop_back
T pop_back(T...args)
ContainedObject
All classes that their objects may be contained in an LHCb ObjectContainer (e.g.
Definition: ContainedObject.h:31
std::vector::back
T back(T...args)

IdentifiedLinks& StreamBuffer::identifiedLinks | ( |  | ) |
| inline

Access to identified links.

Definition at line 252 of file StreamBuffer.h.

252 { return m_identifiedLinks; }
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170

const IdentifiedLinks& StreamBuffer::identifiedLinks | ( |  | ) | const
| inline

CONST Access to identified links.

Definition at line 254 of file StreamBuffer.h.

254 { return m_identifiedLinks; }
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170

bool StreamBuffer::isReading | ( |  | ) | const
| inline

Get stream buffer state.

Definition at line 266 of file StreamBuffer.h.

266 { return m_mode == READING; }
StreamBuffer::READING
Definition: StreamBuffer.h:115
StreamBuffer::m_mode
Mode m_mode
Boolean indicating wether the stream is in read or write mode.
Definition: StreamBuffer.h:152

bool StreamBuffer::isWriting | ( |  | ) | const
| inline

Get stream buffer state.

Definition at line 269 of file StreamBuffer.h.

269 { return m_mode == WRITING; }
StreamBuffer::m_mode
Mode m_mode
Boolean indicating wether the stream is in read or write mode.
Definition: StreamBuffer.h:152
StreamBuffer::WRITING
Definition: StreamBuffer.h:115

StreamBuffer& StreamBuffer::operator<< | ( | longlong | data | ) |
| inline

Output Streamer.

Definition at line 344 of file StreamBuffer.h.

345 {
346 swapToBuffer( &data, sizeof( data ) );
347 STREAM_ANALYSE( data, sizeof( data ) );
348 return *this;
349 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | int | data | ) |
| inline

Output Streamer.

Definition at line 357 of file StreamBuffer.h.

358 {
359 swapToBuffer( &data, sizeof( data ) );
360 STREAM_ANALYSE( data, sizeof( data ) );
361 return *this;
362 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | unsigned int | data | ) |
| inline

Output Streamer.

Definition at line 370 of file StreamBuffer.h.

371 {
372 swapToBuffer( &data, sizeof( data ) );
373 STREAM_ANALYSE( data, sizeof( data ) );
374 return *this;
375 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | long | data | ) |
| inline

Output Streamer.

Definition at line 383 of file StreamBuffer.h.

384 {
385 swapToBuffer( &data, sizeof( data ) );
386 STREAM_ANALYSE( data, sizeof( data ) );
387 return *this;
388 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | unsigned long | data | ) |
| inline

Output Streamer.

Definition at line 396 of file StreamBuffer.h.

397 {
398 swapToBuffer( &data, sizeof( data ) );
399 STREAM_ANALYSE( data, sizeof( data ) );
400 return *this;
401 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | short | data | ) |
| inline

Output Streamer.

Definition at line 409 of file StreamBuffer.h.

410 {
411 swapToBuffer( &data, sizeof( data ) );
412 STREAM_ANALYSE( data, sizeof( data ) );
413 return *this;
414 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | unsigned short | data | ) |
| inline

Output Streamer.

Definition at line 422 of file StreamBuffer.h.

423 {
424 swapToBuffer( &data, sizeof( data ) );
425 STREAM_ANALYSE( data, sizeof( data ) );
426 return *this;
427 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | char | data | ) |
| inline

Output Streamer.

Definition at line 435 of file StreamBuffer.h.

436 {
437 swapToBuffer( &data, sizeof( data ) );
438 STREAM_ANALYSE( data, sizeof( data ) );
439 return *this;
440 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | unsigned char | data | ) |
| inline

Output Streamer.

Definition at line 448 of file StreamBuffer.h.

449 {
450 swapToBuffer( &data, sizeof( data ) );
451 STREAM_ANALYSE( data, sizeof( data ) );
452 return *this;
453 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | float | data | ) |
| inline

Output Streamer.

Definition at line 461 of file StreamBuffer.h.

462 {
463 swapToBuffer( &data, sizeof( data ) );
464 STREAM_ANALYSE( data, sizeof( data ) );
465 return *this;
466 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | double | data | ) |
| inline

Output Streamer.

Definition at line 474 of file StreamBuffer.h.

475 {
476 swapToBuffer( &data, sizeof( data ) );
477 STREAM_ANALYSE( data, sizeof( data ) );
478 return *this;
479 }
StreamBuffer::swapToBuffer
void swapToBuffer(const void *source, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:613
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321

StreamBuffer& StreamBuffer::operator<< | ( | const char * | data | ) |
| inline

Streamer to write strings in (char*) format.

Definition at line 497 of file StreamBuffer.h.

498 {
499 const char* ptr = 0 == data ? "" : data;
500 int len = strlen( ptr ) + 1;
501 if ( 0 == m_analyzer )
502 writeBytes( ptr, len );
503 else {
504 STREAM_ANALYSE( data, len );
505 }
506 return *this;
507 }
StreamBuffer::m_analyzer
AnalyzeFunction m_analyzer
Hook function for analysis of data to the stream.
Definition: StreamBuffer.h:173
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321
std::strlen
T strlen(T...args)
StreamBuffer::writeBytes
StreamBuffer & writeBytes(const char *str, long len)
Write string to output stream.
Definition: StreamBuffer.h:283

StreamBuffer& StreamBuffer::operator<< | ( | const std::string & | data | ) |
| inline

Streamer to write strings in (std::string) format.

Definition at line 519 of file StreamBuffer.h.

520 {
521 if ( 0 == m_analyzer ) {
522 const char* ptr = data.c_str();
523 long len = data.length();
524 writeBytes( ptr, len );
525 } else {
526 STREAM_ANALYSE( data, sizeof( data ) );
527 }
528 return *this;
529 }
StreamBuffer::m_analyzer
AnalyzeFunction m_analyzer
Hook function for analysis of data to the stream.
Definition: StreamBuffer.h:173
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321
std::string::length
T length(T...args)
std::string::c_str
T c_str(T...args)
StreamBuffer::writeBytes
StreamBuffer & writeBytes(const char *str, long len)
Write string to output stream.
Definition: StreamBuffer.h:283

StreamBuffer& StreamBuffer::operator<< | ( | const ContainedObject * | pObject | ) |
| inline

Streamer to write links to contained objects.

Links to contained objects are not stored immediately, but collected instead and analyzed later.

Parameters

  pObject | Pointer to object to be loaded.

Returns
  Reference to StreamBuffer object

Definition at line 548 of file StreamBuffer.h.

549 {
550 STREAM_ANALYSE( pObject, sizeof( pObject ) );
551 addContainedLink( pObject, INVALID, INVALID );
552 return *this;
553 }
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321
StreamBuffer::INVALID
Definition: StreamBuffer.h:119
StreamBuffer::addContainedLink
void addContainedLink(const ContainedObject *pObject, long hint, long link)
Definition: StreamBuffer.h:312

StreamBuffer& StreamBuffer::operator<< | ( | const DataObject * | pObject | ) |
| inline

Streamer to write links to identified objects.

Links to identified objects are not stored immediately, but collected instead and analyzed later.

Parameters

  pObject | Pointer to object to be loaded.

Returns
  Reference to StreamBuffer object

Definition at line 561 of file StreamBuffer.h.

562 {
563 STREAM_ANALYSE( pObject, sizeof( pObject ) );
564 addIdentifiedLink( pObject, INVALID );
565 return *this;
566 }
STREAM_ANALYSE
#define STREAM_ANALYSE(data, len)
Definition: StreamBuffer.h:321
StreamBuffer::addIdentifiedLink
void addIdentifiedLink(const DataObject *pObject, long hint)
Definition: StreamBuffer.h:299
StreamBuffer::INVALID
Definition: StreamBuffer.h:119

StreamBuffer& StreamBuffer::operator>> | ( | longlong & | data | ) |
| inline

Input Streamer.

Definition at line 351 of file StreamBuffer.h.

352 {
353 swapFromBuffer( &data, sizeof( data ) );
354 return *this;
355 }
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | int & | data | ) |
| inline

Input Streamer.

Definition at line 364 of file StreamBuffer.h.

365 {
366 swapFromBuffer( &data, sizeof( data ) );
367 return *this;
368 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | unsigned int & | data | ) |
| inline

Input Streamer.

Definition at line 377 of file StreamBuffer.h.

378 {
379 swapFromBuffer( &data, sizeof( data ) );
380 return *this;
381 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | long & | data | ) |
| inline

Input Streamer.

Definition at line 390 of file StreamBuffer.h.

391 {
392 swapFromBuffer( &data, sizeof( data ) );
393 return *this;
394 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | unsigned long & | data | ) |
| inline

Input Streamer.

Definition at line 403 of file StreamBuffer.h.

404 {
405 swapFromBuffer( &data, sizeof( data ) );
406 return *this;
407 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | short & | data | ) |
| inline

Input Streamer.

Definition at line 416 of file StreamBuffer.h.

417 {
418 swapFromBuffer( &data, sizeof( data ) );
419 return *this;
420 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | unsigned short & | data | ) |
| inline

Input Streamer.

Definition at line 429 of file StreamBuffer.h.

430 {
431 swapFromBuffer( &data, sizeof( data ) );
432 return *this;
433 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | char & | data | ) |
| inline

Input Streamer.

Definition at line 442 of file StreamBuffer.h.

443 {
444 swapFromBuffer( &data, sizeof( data ) );
445 return *this;
446 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | unsigned char & | data | ) |
| inline

Input Streamer.

Definition at line 455 of file StreamBuffer.h.

456 {
457 swapFromBuffer( &data, sizeof( data ) );
458 return *this;
459 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | float & | data | ) |
| inline

Input Streamer.

Definition at line 468 of file StreamBuffer.h.

469 {
470 swapFromBuffer( &data, sizeof( data ) );
471 return *this;
472 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | double & | data | ) |
| inline

Input Streamer.

Definition at line 481 of file StreamBuffer.h.

482 {
483 swapFromBuffer( &data, sizeof( data ) );
484 return *this;
485 }
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::swapFromBuffer
void swapFromBuffer(void *target, int siz)
Swap buffers: int, long, short, float and double.
Definition: StreamBuffer.h:638

StreamBuffer& StreamBuffer::operator>> | ( | char * | data | ) |
| inline

Streamer to read strings in (char*) format.

Definition at line 487 of file StreamBuffer.h.

488 {
489 long i, len;
490 *this >> len;
491 for ( i = 0, data[0] = 0; i < len; i++ ) {
492 data[i] = m_buffer[m_pointer++];
493 }
494 return *this;
495 }
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

StreamBuffer& StreamBuffer::operator>> | ( | std::string & | data | ) |
| inline

Streamer to read strings in (std::string) format.

Definition at line 509 of file StreamBuffer.h.

510 {
511 long i, len;
512 *this >> len;
513 for ( i = 0, data = ""; i < len; i++ ) {
514 data.append( 1, m_buffer[m_pointer++] );
515 }
516 return *this;
517 }
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
std::string::append
T append(T...args)
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155
template<class TYPE >

StreamBuffer& StreamBuffer::operator>> | ( | TYPE *& | refpObject | ) |
| inline

Streamer to read links to contained or identified objects.

The specified internal function call distinguishes between contained and identified objects.

Parameters

  refpObject | Reference to pointer to object to be loaded.

Returns
  Reference to StreamBuffer object

Definition at line 537 of file StreamBuffer.h.

538 {
539 return getObjectPointer( refpObject, refpObject );
540 }
StreamBuffer::getObjectPointer
StreamBuffer & getObjectPointer(const DataObject *, TYPE *&refpObject)
Helper to distinguish between identified pointers and contained pointers.
Definition: StreamBuffer.h:182

void StreamBuffer::reserve | ( | long | len | ) |
| inline

Reserve buffer space; Default: 16 k buffer size.

Definition at line 226 of file StreamBuffer.h.

227 {
228 if ( len > m_length ) {
229 m_length = ( len < 16384 ) ? 16384 : len;
230 m_buffer = (char*)::realloc( m_buffer, m_length );
231 }
232 }
StreamBuffer::m_length
long m_length
Total buffer length.
Definition: StreamBuffer.h:158
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
std::realloc
T realloc(T...args)

void StreamBuffer::serialize | ( | DataIO & | ioObject | ) |
| inline

Serialize the buffer using an IO object.

The streambuffer object will make use of a DataIO object, which can be specialized for streaming to any representation like e.g. disk files, Root files, Objectivity etc.

Parameters

  ioObject | Reference to data IO object.

Definition at line 574 of file StreamBuffer.h.

575 {
576 ioObject.serialize( *this );
577 m_pointer = 0;
578 }
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

void StreamBuffer::setAnalyzer | ( | AnalyzeFunction | fun = `nullptr` | ) |
| inline

Enable user analysis function.

Definition at line 275 of file StreamBuffer.h.

275 { m_analyzer = fun; }
StreamBuffer::m_analyzer
AnalyzeFunction m_analyzer
Hook function for analysis of data to the stream.
Definition: StreamBuffer.h:173
fun
double fun(const std::vector< double > &x)
Definition: PFuncTest.cpp:26

void StreamBuffer::setBuffPointer | ( | long | ptr | ) |
| inline

Retrieve current buffer pointer.

Definition at line 273 of file StreamBuffer.h.

273 { m_pointer = ptr; }
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

void StreamBuffer::setMode | ( | Mode | m | ) |
| inline

Set mode of the stream and allocate buffer.

Definition at line 257 of file StreamBuffer.h.

258 {
259 m_mode = m;
260 m_pointer = 0;
261 m_containedLinks.erase( m_containedLinks.begin(), m_containedLinks.end() );
262 m_identifiedLinks.erase( m_identifiedLinks.begin(), m_identifiedLinks.end() );
263 }
StreamBuffer::m_containedLinks
ContainedLinks m_containedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:167
std::vector::end
T end(T...args)
StreamBuffer::m_mode
Mode m_mode
Boolean indicating wether the stream is in read or write mode.
Definition: StreamBuffer.h:152
Gaudi::Units::m
constexpr double m
Definition: SystemOfUnits.h:94
std::vector::erase
T erase(T...args)
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155
std::vector::begin
T begin(T...args)
StreamBuffer::m_identifiedLinks
IdentifiedLinks m_identifiedLinks
Container with links to contained objects.
Definition: StreamBuffer.h:170

long StreamBuffer::size | ( |  | ) | const
| inline

Total buffer size.

Definition at line 245 of file StreamBuffer.h.

245 { return m_length; }
StreamBuffer::m_length
long m_length
Total buffer length.
Definition: StreamBuffer.h:158

StreamBuffer::SwapAction StreamBuffer::swapBuffer | ( | int | siz | ) | const
| inline protected

Check for byte swapping.

Definition at line 584 of file StreamBuffer.h.

585 {
586 switch ( siz ) {
587 case 1:
588 return SINGLE_BYTE;
589 default:
590 #if defined( __alpha ) && !defined( __VMS )
591 // return m_swapEnabled ? SWAP : NOSWAP;
592 return NOSWAP;
593 #elif defined( __sun ) && defined( __SVR4 ) && defined( __i386 )
594 // return m_swapEnabled ? SWAP : NOSWAP;
595 return NOSWAP;
596 #elif defined( __APPLE__ )
597 // return m_swapEnabled ? SWAP : NOSWAP;
598 return SWAP;
599 #elif defined( __linux ) && !defined( __powerpc )
600 // return m_swapEnabled ? SWAP : NOSWAP;
601 return NOSWAP;
602 #elif defined( BORLAND ) || defined( _WIN32 ) || defined( WIN32 )
603 // return m_swapEnabled ? SWAP : NOSWAP;
604 return NOSWAP;
605 #else
606 return m_swapEnabled ? SWAP : NOSWAP;
607 // return NOSWAP;
608 #endif
609 }
610 }
StreamBuffer::SWAP
Definition: StreamBuffer.h:117
StreamBuffer::SINGLE_BYTE
Definition: StreamBuffer.h:117
StreamBuffer::NOSWAP
Definition: StreamBuffer.h:117
StreamBuffer::m_swapEnabled
bool m_swapEnabled
Flag indicating swapping.
Definition: StreamBuffer.h:164

void StreamBuffer::swapFromBuffer | ( | void * | target,
|  | int | siz
| ) |  |
| inline

Swap buffers: int, long, short, float and double.

Swap bytes from the stream buffer to target buffer with arbitray size.

Definition at line 638 of file StreamBuffer.h.

639 {
640 char* tar = (char*)target;
641 char* src = (char*)m_buffer + m_pointer;
642 switch ( swapBuffer( siz ) ) {
643 case SINGLE_BYTE:
644 *tar = *src;
645 break;
646 case SWAP:
647 #ifdef __APPLE__
648 for ( int i = 0, j = siz - 1; i < siz; i++, j-- ) tar[j] = src[i];
649 #else
650 ::_swab( src, tar, siz );
651 #endif
652 break;
653 case NOSWAP:
654 std::copy_n( src, siz, tar );
655 break;
656 }
657 m_pointer += siz;
658 }
StreamBuffer::SWAP
Definition: StreamBuffer.h:117
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
std::copy_n
T copy_n(T...args)
StreamBuffer::SINGLE_BYTE
Definition: StreamBuffer.h:117
_swab
#define _swab(source, target, radix)
Definition: swab.h:7
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155
StreamBuffer::NOSWAP
Definition: StreamBuffer.h:117
StreamBuffer::swapBuffer
SwapAction swapBuffer(int siz) const
Check for byte swapping.
Definition: StreamBuffer.h:584

void StreamBuffer::swapToBuffer | ( | const void * | source,
|  | int | siz
| ) |  |
| inline

Swap buffers: int, long, short, float and double.

Swap bytes from a source buffer to the stream buffer with arbitray size.

Definition at line 613 of file StreamBuffer.h.

614 {
615 char buff[8], *tar, *src = (char *)source;
616 extend( m_pointer + siz );
617 tar = (char*)m_buffer + m_pointer;
618 switch ( swapBuffer( siz ) ) {
619 case SINGLE_BYTE:
620 *tar = *src;
621 break;
622 case SWAP:
623 #ifdef __APPLE__
624 for ( int i = 0, j = siz - 1; i < siz; i++, j-- ) tar[j] = src[i];
625 #else
626 ::_swab( src, buff, siz );
627 #endif
628 src = buff;
629 /* FALLTHROUGH */
630 case NOSWAP:
631 std::copy_n( src, siz, tar );
632 break;
633 }
634 m_pointer += siz;
635 }
StreamBuffer::SWAP
Definition: StreamBuffer.h:117
StreamBuffer::m_buffer
char * m_buffer
Pointer to heap buffer.
Definition: StreamBuffer.h:161
StreamBuffer::extend
void extend(long len)
Extend the buffer.
Definition: StreamBuffer.h:234
std::copy_n
T copy_n(T...args)
StreamBuffer::SINGLE_BYTE
Definition: StreamBuffer.h:117
_swab
#define _swab(source, target, radix)
Definition: swab.h:7
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155
StreamBuffer::NOSWAP
Definition: StreamBuffer.h:117
StreamBuffer::swapBuffer
SwapAction swapBuffer(int siz) const
Check for byte swapping.
Definition: StreamBuffer.h:584

StreamBuffer& StreamBuffer::writeBytes | ( | const char * | str,
|  | long | len
| ) |  |
| inline

Write string to output stream.

Definition at line 283 of file StreamBuffer.h.

284 {
285 extend( m_pointer + len + 4 );
286 *this << len;
287 std::copy_n( str, len, data() + buffPointer() );
288 m_pointer += len;
289 return *this;
290 }
StreamBuffer::buffPointer
long buffPointer() const
Retrieve current buffer pointer.
Definition: StreamBuffer.h:271
StreamBuffer::extend
void extend(long len)
Extend the buffer.
Definition: StreamBuffer.h:234
std::copy_n
T copy_n(T...args)
StreamBuffer::data
const char * data() const
Read access to data buffer.
Definition: StreamBuffer.h:209
StreamBuffer::m_pointer
long m_pointer
Current buffer pointer.
Definition: StreamBuffer.h:155

## Friends And Related Function Documentation

friend class DataObject
| friend

DataObject is friend.

Definition at line 148 of file StreamBuffer.h.

## Member Data Documentation

AnalyzeFunction StreamBuffer::m_analyzer = nullptr
| protected

Hook function for analysis of data to the stream.

Definition at line 173 of file StreamBuffer.h.

char* StreamBuffer::m_buffer = nullptr
| mutable protected

Pointer to heap buffer.

Definition at line 161 of file StreamBuffer.h.

ContainedLinks StreamBuffer::m_containedLinks
| mutable protected

Container with links to contained objects.

Definition at line 167 of file StreamBuffer.h.

IdentifiedLinks StreamBuffer::m_identifiedLinks
| mutable protected

Container with links to contained objects.

Definition at line 170 of file StreamBuffer.h.

long StreamBuffer::m_length = 0
| mutable protected

Total buffer length.

Definition at line 158 of file StreamBuffer.h.

Mode StreamBuffer::m_mode = UNINITIALIZED
| protected

Boolean indicating wether the stream is in read or write mode.

Definition at line 152 of file StreamBuffer.h.

long StreamBuffer::m_pointer = 0
| mutable protected

Current buffer pointer.

Definition at line 155 of file StreamBuffer.h.

bool StreamBuffer::m_swapEnabled = true
| protected

Flag indicating swapping.

Definition at line 164 of file StreamBuffer.h.

The documentation for this class was generated from the following file:

- GaudiKernel/GaudiKernel/StreamBuffer.h