This file is indexed.

/usr/include/Netxx/Netbuf.h is in libnetxx-dev 0.3.2-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
/*
 * Copyright (C) 2001-2003 Peter J Jones (pjones@pmade.org)
 * All Rights Reserved
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the Author nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/** @file
 * This file contains the definition of the Netxx:Netbuf template class.
**/

#ifndef _Netxx_Netbuf_h_
#define _Netxx_Netbuf_h_

// Netxx includes
#include <Netxx/StreamBase.h>

// standard includes
#include <streambuf>
#include <algorithm>
#include <cstring>

namespace Netxx {
    const std::streamsize PUTBACK_SIZE = 4;
}

namespace Netxx {

/**
 * The Netxx::Netbuf template class is a IOStreams streambuf. After you
 * create an instance of a Netxx::Netbuf class you can pass a pointer to it
 * to a std::iostream, std::ostream or std::istream class. Then you can do
 * basic IOStreams operations on it.
 *
 * This streambuf is buffered so you should call std::flush to make sure it
 * sends the data that you inserted.
**/
template <std::streamsize bufsize, class charT=char, class traits=std::char_traits<char> >
class Netbuf : public std::basic_streambuf<charT, traits> {
public:
    /// int type
    typedef typename std::basic_streambuf<charT, traits>::int_type int_type;

    /// char type
    typedef typename std::basic_streambuf<charT, traits>::char_type char_type;

    //####################################################################
    /** 
     * Construct a Netxx::Netbuf object and link it to the given StreamBase
     * object. The StreamBase object will be used for reading and writing to
     * the Netbuf (std::streambuf) object.
     *
     * @param stream The StreamBase object to use for reading and writing.
     * @author Peter Jones
    **/
    //####################################################################
    explicit Netbuf (StreamBase &stream);

    //####################################################################
    /** 
     * Netxx::Netbuf class destructor.
     *
     * @author Peter Jones
    **/
    //####################################################################
    ~Netbuf (void);
protected:
    // TODO streamsize xsputn (const char_type *s, streamsize n);
    int_type overflow (int_type c=traits::eof());
    int sync (void);

    int_type underflow (void);
    int_type pbackfail (int_type c);
private:
    StreamBase &stream_;
    charT putbuf_[bufsize];
    charT getbuf_[bufsize];

    int buffer_out (void);
    int buffer_in  (void);

    Netbuf (const Netbuf&);
    Netbuf& operator= (const Netbuf&);
}; // end Netxx::Netbuf class

//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
Netbuf<bufsize, charT, traits>::Netbuf (StreamBase &stream)
    : stream_(stream)
{
    setp(putbuf_, putbuf_ + bufsize);
    setg(getbuf_+PUTBACK_SIZE, getbuf_+PUTBACK_SIZE, getbuf_+PUTBACK_SIZE);
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
Netbuf<bufsize, charT, traits>::~Netbuf (void) {
    sync();
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
typename Netbuf<bufsize, charT, traits>::int_type Netbuf<bufsize, charT, traits>::overflow (int_type c) {
    if (buffer_out() < 0) {
	return traits::eof();
    } else if (!traits::eq_int_type(c, traits::eof())) {
	return sputc(c);
    } else {
	return traits::not_eof(c);
    }
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
int Netbuf<bufsize, charT, traits>::sync (void) {
    return buffer_out();
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
int Netbuf<bufsize, charT, traits>::buffer_out (void) {
    int length = this->pptr() - this->pbase();
    int rc = stream_.write(putbuf_, length);
    this->pbump(-length);
    return rc;
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
typename Netbuf<bufsize, charT, traits>::int_type Netbuf<bufsize, charT, traits>::underflow (void) {
    if (this->gptr() < this->egptr()) 
       return traits::to_int_type(*this->gptr());
    if (buffer_in() < 0) return traits::eof();
    else return traits::to_int_type(*this->gptr());
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
typename Netbuf<bufsize, charT, traits>::int_type Netbuf<bufsize, charT, traits>::pbackfail(int_type c) {
    if (this->gptr() != this->eback()) {
       this->gbump(-1);

	if (!traits::eq_int_type(c, traits::eof())) {
	    *(this->gptr()) = traits::to_char_type(c);
	}

	return traits::not_eof(c);
    } else {
       return traits::eof();
    }
}
//#############################################################################
template<std::streamsize bufsize, class charT, class traits>
int Netbuf<bufsize, charT, traits>::buffer_in (void) {
    std::streamsize number_putbacks = std::min(this->gptr() - this->eback(), PUTBACK_SIZE);
    std::memcpy(getbuf_ + (PUTBACK_SIZE - number_putbacks) * sizeof(char_type),
                this->gptr() - number_putbacks * sizeof(char_type), number_putbacks * sizeof(char_type));

    int rc = stream_.read(getbuf_ + PUTBACK_SIZE * sizeof(char_type), bufsize - PUTBACK_SIZE);
    
    if (rc <= 0) {
       this->setg(0, 0, 0);
       return -1;
    } else {
       this->setg(getbuf_ + PUTBACK_SIZE - number_putbacks, getbuf_ + PUTBACK_SIZE, getbuf_ + PUTBACK_SIZE + rc);
       return rc;
    }
}

} // end Netxx namespace
#endif