/usr/include/tntdb/iface/iblob.h is in libtntdb-dev 1.3-2.
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 | /*
* Copyright (C) 2007-2008 Tommi Maekitalo
* Copyright (C) 2007-2008 Marc Boris Duerner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef TNTDB_IFACE_IBLOB_H
#define TNTDB_IFACE_IBLOB_H
#include <cxxtools/refcounted.h>
#include <cstddef>
#include <cstring>
namespace tntdb
{
/** @brief Implementation base of Blob values
This class serves as the base for the shared implementation classes used
in Blob objects. The non-virtual interface consists of a pointer to the
blob-data and its size. The implementor has to override three virtual methods,
IBlob::assign, IBlob::create and IBlob::destroy. The main purpose of these
methods is to customize memory allocation of blob-data, aswell as the shared
implementation class derived from IBlob. A default implementation, called
BlobImpl, is provided, that uses new/delete and the implementation class.
*/
class IBlob : public cxxtools::AtomicRefCounted
{
public:
/** @brief Destructor
*/
virtual ~IBlob();
/** @brief Assign data of a given length
The \a len bytes of the data pointed to by \a data are copied
to this blob.
*/
virtual void assign(const char* data, std::size_t len) = 0;
/** @brief Makes sure, the buffer has at least \a len bytes.
*/
virtual char* reserve(std::size_t len, bool shrink) = 0;
/** @brief Create a value implementation
Returns a pointer to a implementation class derived from IBlob.
IBlob::destroy must be implemented accordingly to destroy this
instance.
*/
virtual IBlob* create() const = 0;
/** @brief Destroy a value implementation
Destroys an instance previously created by the IBlob::create.
*/
virtual void destroy() = 0;
/** @brief Returns the size of the blob-data.
*/
std::size_t size() const
{ return _size; }
/** @brief Returns a pointer to the blob-data or 0 if the blob is empty
*/
const char* data() const
{ return _data; }
/** @brief Returns true if the two instances contain the same data
*/
bool operator==(const IBlob& other) const
{
return _size == other._size &&
( std::strncmp(_data, other._data, _size) == 0 );
}
protected:
IBlob()
: _data(0)
, _size(0)
{ }
char* _data;
std::size_t _size;
};
}
#endif
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