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JLANG::JFileStreamBuffer Class Reference

Input and output file stream buffer. More...

#include <JFileStreamBuffer.hh>

Inheritance diagram for JLANG::JFileStreamBuffer:
JLANG::JFileInputStreamBuffer JLANG::JFileOutputStreamBuffer std::vector< char > std::vector< char > JLANG::JFileStream JSYSTEM::JShell

Public Types

typedef traits_type::int_type int_type
 
typedef traits_type::int_type int_type
 
typedef std::streamsize streamsize
 

Public Member Functions

 JFileStreamBuffer (const JAbstractFile &in, const JAbstractFile &out, const std::size_t size=65536, const std::size_t put_back=8)
 Constructor. More...
 
virtual int_type underflow () override
 Check underflow. More...
 
bool in_avail (JTimeval timeout=JTimeval::min()) const
 Check availability of input. More...
 
virtual int_type overflow (int_type c) override
 Check overflow. More...
 
virtual int sync () override
 Synchronise buffer. More...
 
bool out_avail (JTimeval timeout=JTimeval::min()) const
 Check availability of output. More...
 

Protected Member Functions

int flush ()
 Flush internal buffer. More...
 

Protected Attributes

JFile in
 
std::size_t memory
 
JFile out
 

Detailed Description

Input and output file stream buffer.

Definition at line 235 of file JFileStreamBuffer.hh.

Member Typedef Documentation

typedef traits_type::int_type JLANG::JFileInputStreamBuffer::int_type
inherited

Definition at line 32 of file JFileStreamBuffer.hh.

typedef traits_type::int_type JLANG::JFileOutputStreamBuffer::int_type
inherited

Definition at line 121 of file JFileStreamBuffer.hh.

typedef std::streamsize JLANG::JFileOutputStreamBuffer::streamsize
inherited

Definition at line 122 of file JFileStreamBuffer.hh.

Constructor & Destructor Documentation

JLANG::JFileStreamBuffer::JFileStreamBuffer ( const JAbstractFile &  in,
const JAbstractFile &  out,
const std::size_t  size = 65536,
const std::size_t  put_back = 8 
)
inline

Constructor.

Parameters
ininput file
outoutput file
sizesize of internal buffer
put_backnumber of put back characters

Definition at line 248 of file JFileStreamBuffer.hh.

251  :
252  JFileInputStreamBuffer (in, size, put_back),
253  JFileOutputStreamBuffer(out, size)
254  {}
JLANG::JFileOutputStreamBuffer::JFileOutputStreamBuffer
JFileOutputStreamBuffer(const JAbstractFile &file, const std::size_t size=65536)
Constructor.
Definition: JFileStreamBuffer.hh:131
JLANG::JFileInputStreamBuffer::JFileInputStreamBuffer
JFileInputStreamBuffer(const JAbstractFile &file, const std::size_t size=65536, const std::size_t put_back=8)
Constructor.
Definition: JFileStreamBuffer.hh:42

Member Function Documentation

virtual int_type JLANG::JFileInputStreamBuffer::underflow ( )
inlineoverridevirtualinherited

Check underflow.

This method reads as many bytes as possible.

Returns
first character if OK; else EOF

Definition at line 60 of file JFileStreamBuffer.hh.

61  {
62  if (gptr() >= egptr()) {
63 
64  char* __begin = this->data();
65 
66  if (eback() == __begin) {
67 
68  // push put back characters
69 
70  memmove(__begin, egptr() - memory, memory);
71 
72  __begin += memory;
73  }
74 
75  const size_t len = in.read(__begin, this->size() - (__begin - this->data()));
76 
77  if (len != 0)
78  setg(this->data(), __begin, __begin + len);
79  else
80  return traits_type::eof();
81  }
82 
83  return *gptr();
84  }
JLANG::JFile::read
virtual int read(char *buffer, const int length)
Read data from file.
Definition: JFile.hh:74
bool JLANG::JFileInputStreamBuffer::in_avail ( JTimeval  timeout = JTimeval::min()) const
inlineinherited

Check availability of input.

This method returns true if at least one byte can be read without blocking.

Parameters
timeouttimeout
Returns
true if ready to read; else false

Definition at line 94 of file JFileStreamBuffer.hh.

95  {
96  return JFileDescriptorMask(in).in_avail(timeout);
97  }
JLANG::JFileDescriptorMask
Auxiliary class for method select.
Definition: JFileDescriptorMask.hh:24
JLANG::JFileDescriptorMask::in_avail
bool in_avail(JTimeval timeout=JTimeval::min())
Check availability of input.
Definition: JFileDescriptorMask.hh:264
virtual int_type JLANG::JFileOutputStreamBuffer::overflow ( int_type  c)
inlineoverridevirtualinherited

Check overflow.

This method writes one byte if possible.

Parameters
ccharacter
Returns
c if OK; else EOF

Definition at line 159 of file JFileStreamBuffer.hh.

160  {
161  if (c != traits_type::eof()) {
162 
163  *pptr() = (char) c;
164 
165  pbump(1);
166 
167  if (flush() == traits_type::eof()) {
168  return traits_type::eof();
169  }
170  }
171 
172  return c;
173  }
JLANG::JFileOutputStreamBuffer::flush
int flush()
Flush internal buffer.
Definition: JFileStreamBuffer.hh:204
c
$WORKDIR ev_configure_dqsimulator txt echo process $DQ_SIMULATOR $i $SOURCE_HOST[$index] csh c(setenv ROOTSYS $ROOTSYS &&source $JPP_DIR/setenv.csh $JPP_DIR &&($DQ_SIMULATOR\-u\$NAME\$\-H\$SERVER\$\-M\$LOGGER\$\-d $DEBUG</dev/null > &/dev/null &))'
virtual int JLANG::JFileOutputStreamBuffer::sync ( )
inlineoverridevirtualinherited

Synchronise buffer.

Definition at line 179 of file JFileStreamBuffer.hh.

180  {
181  if (flush() == traits_type::eof())
182  return -1;
183  else
184  return 0;
185  }
JLANG::JFileOutputStreamBuffer::flush
int flush()
Flush internal buffer.
Definition: JFileStreamBuffer.hh:204
bool JLANG::JFileOutputStreamBuffer::out_avail ( JTimeval  timeout = JTimeval::min()) const
inlineinherited

Check availability of output.

This method returns true if at least one byte can be written without blocking.

Parameters
timeouttimeout
Returns
true if ready to write; else false

Definition at line 195 of file JFileStreamBuffer.hh.

196  {
197  return JFileDescriptorMask(out).out_avail(timeout);
198  }
JLANG::JFileDescriptorMask::out_avail
bool out_avail(JTimeval timeout=JTimeval::min())
Check availability of output.
Definition: JFileDescriptorMask.hh:278
JLANG::JFileDescriptorMask
Auxiliary class for method select.
Definition: JFileDescriptorMask.hh:24
int JLANG::JFileOutputStreamBuffer::flush ( )
inlineprotectedinherited

Flush internal buffer.

Definition at line 204 of file JFileStreamBuffer.hh.

205  {
206  const int len = pptr() - pbase();
207 
208  if (len != 0) {
209 
210  if (out.write(this->data(), len) != len) {
211  return traits_type::eof();
212  }
213 
214  pbump(-len);
215  }
216 
217  return len;
218  }
this
then usage $script< detector file >< detectorfile > nIf the range of floors is the first detector file is aligned to the second before the comparison nIn this
Definition: JCompareDetector.sh:31
JLANG::JFile::write
virtual int write(const char *buffer, const int length)
Write data to file.
Definition: JFile.hh:87

Member Data Documentation

JFile JLANG::JFileInputStreamBuffer::in
protectedinherited

Definition at line 100 of file JFileStreamBuffer.hh.

std::size_t JLANG::JFileInputStreamBuffer::memory
protectedinherited

Definition at line 101 of file JFileStreamBuffer.hh.

JFile JLANG::JFileOutputStreamBuffer::out
protectedinherited

Definition at line 221 of file JFileStreamBuffer.hh.

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