class Poco::CountingStreamBuf

Overview

This stream buffer counts all characters and lines going through it. More…

#include <CountingStream.h>

class CountingStreamBuf: public Poco::BasicUnbufferedStreamBuf
{
public:
    // construction

    CountingStreamBuf();
    CountingStreamBuf(std::istream& istr);
    CountingStreamBuf(std::ostream& ostr);

    // methods

    int
    chars() const;

    int
    lines() const;

    int
    pos() const;

    void
    reset();

    void
    setCurrentLineNumber(int line);

    int
    getCurrentLineNumber() const;

    void
    addChars(int chars);

    void
    addLines(int lines);

    void
    addPos(int pos);

protected:
    // methods

    virtual
    int
    readFromDevice();

    int
    writeToDevice(char c);
};

Inherited Members

public:
    // methods

    virtual
    int_type
    overflow(int_type c);

    virtual
    int_type
    underflow();

    virtual
    int_type
    uflow();

    virtual
    int_type
    pbackfail(int_type c);

    virtual
    std::streamsize
    xsgetn(
        char_type* p,
        std::streamsize count
        );

protected:
    // typedefs

    typedef std::basic_streambuf<ch, tr> Base;
    typedef std::basic_ios<ch, tr> IOS;
    typedef ch char_type;
    typedef tr char_traits;
    typedef Base::int_type int_type;
    typedef Base::pos_type pos_type;
    typedef Base::off_type off_type;
    typedef IOS::openmode openmode;

    // methods

    static
    int_type
    charToInt(char_type c);

Detailed Documentation

This stream buffer counts all characters and lines going through it.

Construction

CountingStreamBuf()

Creates an unconnected CountingStreamBuf.

CountingStreamBuf(std::istream& istr)

Creates the CountingStreamBuf and connects it to the given input stream.

CountingStreamBuf(std::ostream& ostr)

Creates the CountingStreamBuf and connects it to the given output stream.

Methods

int
chars() const

Returns the total number of characters.

int
lines() const

Returns the total number of lines.

int
pos() const

Returns the number of characters on the current line.

void
reset()

Resets all counters.

void
setCurrentLineNumber(int line)

Sets the current line number.

This is mainly useful when parsing C/C++ preprocessed source code containing #line directives.

int
getCurrentLineNumber() const

Returns the current line number (same as lines()).

void
addChars(int chars)

Add to the total number of characters.

void
addLines(int lines)

Add to the total number of lines.

void
addPos(int pos)

Add to the number of characters on the current line.