/usr/include/pdal/util/Charbuf.hpp is in libpdal-dev 1.4.0-1+b1.
This file is owned by root:root, with mode 0o644.
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* Copyright (c) 2014, Hobu Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
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#pragma once
#include <streambuf>
#include <iostream>
#include <vector>
#include "pdal_util_export.hpp"
namespace pdal
{
/**
Allow a data buffer to be used at a std::streambuf.
*/
class Charbuf : public std::streambuf
{
public:
/**
Construct an empty Charbuf.
*/
PDAL_DLL Charbuf() : m_bufOffset(0)
{}
/**
Construct a Charbuf that wraps a byte vector.
\param v Byte vector to back streambuf.
\param bufOffset Offset in vector (ignore bytes before offset).
*/
PDAL_DLL Charbuf (std::vector<char>& v, pos_type bufOffset = 0)
{ initialize(v.data(), v.size(), bufOffset); }
/**
Construct a Charbuf that wraps a byte buffer.
\param buf Buffer to back streambuf.
\param count Size of buffer.
\param bufOffset Offset in vector (ignore bytes before offset).
*/
PDAL_DLL Charbuf (char *buf, size_t count, pos_type bufOffset = 0)
{ initialize(buf, count, bufOffset); }
/**
Set a buffer to back a Charbuf.
\param buf Buffer to back streambuf.
\param count Size of buffer.
\param bufOffset Offset in vector (ignore bytes before offset).
*/
PDAL_DLL void initialize(char *buf, size_t count, pos_type bufOffset = 0);
protected:
/**
Seek to a position in the buffer.
\param pos Position to seek to.
\param which I/O mode [default: rw]
\return Current position adjusted for buffer offset.
*/
PDAL_DLL std::ios::pos_type seekpos(std::ios::pos_type pos,
std::ios_base::openmode which = std::ios_base::in | std::ios_base::out);
/**
Seek to a position based on an offset from a position.
\param off Offset from current position.
\param dir Offset basis (beg, cur or end)
\param which I/O mode [default: rw]
\return Current position adjusted for buffer offset.
*/
PDAL_DLL std::ios::pos_type seekoff(std::ios::off_type off,
std::ios_base::seekdir dir,
std::ios_base::openmode which = std::ios_base::in | std::ios_base::out);
private:
/**
Offset that allows one to seek to positions not based on the beginning
of the backing vector, but to some other reference point.
*/
std::ios::pos_type m_bufOffset;
/**
For the put pointer, it seems we need the beginning of the buffer
in order to deal with offsets.
*/
char *m_buf;
};
} //namespace pdal
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