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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/rwstreambuf_8cpp_source.html below:

NCBI C++ ToolKit: src/corelib/rwstreambuf.cpp Source File

41 #define NCBI_USE_ERRCODE_X Corelib_StreamBuf 44 #define RWSTREAMBUF_HANDLE_EXCEPTIONS(call, subcode, message, action) \ 46  switch (m_Flags & (fLogExceptions | fLeakExceptions)) { \ 47  case fLeakExceptions: \ 65  catch (CException& e) { \ 67  NCBI_REPORT_EXCEPTION_X(subcode, message, e); \ 70  if (m_Flags & fLeakExceptions) \ 73  catch (exception& e) { \ 75  ERR_POST_X(subcode, Error \ 77  << "] Exception: "

<< e.what()); \

80

if (m_Flags & fLeakExceptions) \

85

ERR_POST_X(subcode, Error \

86

<< '[' << message << "] Unknown exception"); \

89

if (m_Flags & fLeakExceptions) \

95

if (result != eRW_Success && result != eRW_NotImplemented \

96

&& !(m_Flags & fNoStatusLog)) { \

97

bool trace = (result == eRW_Timeout || \

98

result == eRW_Eof ? true : false); \

100

Message << (trace ? Trace : Info) << message \

101

<< ": " << &g_RW_ResultToString(result)[4

]); \ 111  "eRW_NotImplemented"

,

156 #if !defined(NCBI_COMPILER_GCC) || NCBI_COMPILER_VERSION >= 700 206  size_t count

= (size_t)(egptr() - ptr);

211

14,

"CRWStreambuf::Pushback(): IReader::Pushback()"

,

230  ERR_POST_X

(13,

"CRWStreambuf::~CRWStreambuf():" 231  " Read data pending"

);

254  size_t n

= (size_t) m;

289  _ASSERT

(pbase() <= pptr() && pptr() <= epptr());

295  size_t

n_towrite = (size_t)(pptr() - pbase());

305

5,

"CRWStreambuf::overflow(): IWriter::Write()"

,

307  _ASSERT

(n_written <= n_towrite);

313  memmove

(pbase(), pbase() + n_written, n_towrite - n_written);

315

pbump(-

int

(n_written));

322

n_towrite -= n_written;

338

6,

"CRWStreambuf::overflow(): IWriter::Write(1)"

,

357

7,

"CRWStreambuf::overflow(): IWriter::Flush()"

,

377  _ASSERT

(pbase() <= pptr() && pptr() <= epptr());

383  size_t n

= (size_t) m;

384  size_t

n_written = 0;

392  if

(

n

&& pbase() +

n

< epptr()) {

394

x_written = (size_t)(epptr() - pptr());

398

memcpy(pptr(),

buf

, x_written);

399

pbump(

int

(x_written));

400

n_written += x_written;

403  return

(streamsize) n_written;

408  size_t

x_towrite = (size_t)(pptr() - pbase());

413

8,

"CRWStreambuf::xsputn(): IWriter::Write()"

,

415  _ASSERT

(x_written <= x_towrite);

422  memmove

(pbase(), pbase() + x_written, x_towrite - x_written);

424

pbump(-

int

(x_written));

432

9,

"CRWStreambuf::xsputn(): IWriter::Write()"

,

435  if

(!x_written &&

n

) {

442

n_written += x_written;

445  return

(streamsize) n_written;

452

x_written = (size_t)(epptr() - pptr());

456

memcpy(pptr(),

buf

, x_written);

457

n_written += x_written;

458

pbump(

int

(x_written));

464  return

(streamsize) n_written;

482 #ifdef NCBI_COMPILER_MIPSPRO 483  if

(m_MIPSPRO_ReadsomeGptrSetLevel && m_MIPSPRO_ReadsomeGptr != gptr())

494

10,

"CRWStreambuf::underflow(): IReader::Read()"

,

532  size_t n

= (size_t) m;

537

n_read = (size_t)(egptr() - gptr());

541

memcpy(

buf

, gptr(), n_read);

542

gbump(

int

(n_read));

545  return

(streamsize) n_read;

552  return

(streamsize) n_read;

564

11,

"CRWStreambuf::xsgetn(): IReader::Read()"

,

574  size_t

xx_read = x_read;

599  return

(streamsize) n_read;

629

12,

"CRWStreambuf::showmanyc(): IReader::PendingCount()"

,

655

IOS_BASE::openmode which)

657  if

(whence == IOS_BASE::cur && off == 0) {

668

&& ((whence == IOS_BASE::cur && (off > 0)) ||

669

(whence == IOS_BASE::beg && (off -=

x_GetGPos

()) >= 0))){

670  if

(

m_Reader

&&

x_Read

(0, (streamsize) off) == (streamsize) off)

virtual streamsize xsgetn(CT_CHAR_TYPE *s, streamsize n)

virtual CT_POS_TYPE seekoff(CT_OFF_TYPE off, IOS_BASE::seekdir whence, IOS_BASE::openmode which=IOS_BASE::in|IOS_BASE::out)

Only seekoff(0, IOS_BASE::cur, *) to obtain current position, and input skip-forward are permitted: s...

virtual CT_INT_TYPE overflow(CT_INT_TYPE c)

CT_CHAR_TYPE * m_WriteBuf

CT_POS_TYPE x_ErrPos

position of the _write_ error (if x_Err)

virtual CNcbiStreambuf * setbuf(CT_CHAR_TYPE *buf, streamsize buf_size)

Per the standard, setbuf(0, 0) makes I/O unbuffered.

@ fOwnReader

Own the underlying reader.

@ fOwnWriter

Own the underlying writer.

@ fUntie

Do not flush before reading.

int TFlags

Bitwise OR of EFlags.

CT_POS_TYPE x_GPos

get position [for istream::tellg()]

ERW_Result x_Pushback(void)

virtual streamsize showmanyc(void)

CRWStreambuf(IReaderWriter *rw=0, streamsize buf_size=0, CT_CHAR_TYPE *buf=0, TFlags flags=0)

bool x_Err

whether there was a _write_ error

CT_POS_TYPE x_GetGPos(void)

bool x_Eof

whether at EOF

streamsize x_Read(CT_CHAR_TYPE *s, streamsize n)

CT_POS_TYPE x_GetPPos(void)

AutoPtr< IReader > m_Reader

AutoPtr< IWriter > m_Writer

virtual streamsize xsputn(const CT_CHAR_TYPE *buf, streamsize n)

virtual CT_INT_TYPE underflow(void)

CT_POS_TYPE x_PPos

put position [for ostream::tellp()]

A very basic data-read/write interface.

A very basic data-read interface.

A very basic data-write interface.

Abstract reader-writer interface classes.

std::ofstream out("events_result.xml")

main entry point for tests

element_type * get(void) const

Get pointer.

@ eTakeOwnership

An object can take ownership of another.

@ eNoOwnership

No ownership is assumed.

#define ERR_POST_X(err_subcode, message)

Error posting with default error code and given error subcode.

void Critical(CExceptionArgs_Base &args)

#define NCBI_CATCH_ALL_X(err_subcode, message)

#define THROW1_TRACE(exception_class, exception_arg)

Throw trace.

uint64_t Uint8

8-byte (64-bit) unsigned integer

#define END_NCBI_SCOPE

End previously defined NCBI scope.

#define BEGIN_NCBI_SCOPE

Define ncbi namespace.

ERW_Result

Result codes for I/O operations.

const char * g_RW_ResultToString(ERW_Result result)

virtual ERW_Result Flush(void)=0

Flush pending data (if any) down to the output device.

virtual ERW_Result PendingCount(size_t *count)=0

Via parameter "count" (which is guaranteed to be supplied non-NULL) return the number of bytes that a...

virtual ERW_Result Pushback(const void *buf, size_t count, void *del_ptr=0)

This method gets called by RStream buffer destructor to return buffered yet still unread (from the st...

virtual ERW_Result Write(const void *buf, size_t count, size_t *bytes_written=0)=0

Write up to "count" bytes from the buffer pointed to by the "buf" argument onto the output device.

virtual ERW_Result Read(void *buf, size_t count, size_t *bytes_read=0)=0

Read as many as "count" bytes into a buffer pointed to by the "buf" argument.

IO_PREFIX::streambuf CNcbiStreambuf

Portable alias for streambuf.

@ eRW_NotImplemented

Action / information is not available.

@ eRW_Eof

End of data, should be considered permanent.

@ eRW_Error

Unrecoverable error, no retry possible.

@ eRW_Success

Everything is okay, I/O completed.

enum ENcbiOwnership EOwnership

Ownership relations between objects.

Definition of all error codes used in corelib (xncbi.lib).

NCBI C++ auxiliary debug macros.

Defines NCBI C++ exception handling.

std::istream & in(std::istream &in_, double &x_)

double r(size_t dimension_, const Int4 *score_, const double *prob_, double theta_)

Reader-writer based streams.

#define RWSTREAMBUF_HANDLE_EXCEPTIONS(call, subcode, message, action)

static bool x_CheckRW(const void *rw)

static const streamsize kDefaultBufSize

static EOwnership x_IfToOwnWriter(const IReader *r, const IWriter *w, CRWStreambuf::TFlags f)

static EOwnership x_IfToOwnReader(const IReader *r, const IWriter *w, CRWStreambuf::TFlags f)


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