JLANG::JFileInputStream Class Reference

Streaming of input. More...

#include <JFileStream.hh>

Inheritance diagram for JLANG::JFileInputStream:

Public Member Functions
	JFileInputStream (const JAbstractFile &file, const std::size_t size=65536)
	Constructor. More...

Protected Types
typedef traits_type::int_type	int_type

Protected Member Functions
virtual int_type	underflow () override
	Check underflow. More...
bool	in_avail (JTimeval timeout=JTimeval::min()) const
	Check availability of input. More...

Protected Attributes
JFile	in
std::size_t	memory

Detailed Description

Streaming of input.

Definition at line 24 of file JFileStream.hh.

Member Typedef Documentation

int_type

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

inherited

Definition at line 32 of file JFileStreamBuffer.hh.

Constructor & Destructor Documentation

JFileInputStream()

JLANG::JFileInputStream::JFileInputStream ( const JAbstractFile &  file, const std::size_t  size = 65536  )

inline

Constructor.

Parameters

file	file
size	size of internal buffer

Definition at line 35 of file JFileStream.hh.

                                                      :
      JFileInputStreamBuffer(file, size),
      std::istream(this)
    {}

Member Function Documentation

underflow()

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.

    {   
      if (gptr() >= egptr()) {
 
        char* __begin = this->data();
 
        if (eback() == __begin) { 
          
          // push put back characters
 
          memmove(__begin, egptr() - memory, memory);
        
          __begin += memory;
        }
        
        const size_t len = in.read(__begin, this->size() - (__begin - this->data()));
        
        if (len != 0)
          setg(this->data(), __begin, __begin + len);
        else
          return traits_type::eof();
      }
        
      return *gptr();
    } 

in_avail()

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

timeout

timeout

Returns

true if ready to read; else false

Definition at line 94 of file JFileStreamBuffer.hh.

    {
      return JFileDescriptorMask(in).in_avail(timeout);
    }

Member Data Documentation

in

JFile JLANG::JFileInputStreamBuffer::in

protectedinherited

Definition at line 100 of file JFileStreamBuffer.hh.

memory

std::size_t JLANG::JFileInputStreamBuffer::memory

protectedinherited

Definition at line 101 of file JFileStreamBuffer.hh.

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

• JFileStream.hh