buffer.hh

00001 // Copyright (C) 2004  EPITA Research and Development Laboratory
00002 //
00003 // This file is part of the Olena Library.  This library is free
00004 // software; you can redistribute it and/or modify it under the terms
00005 // of the GNU General Public License version 2 as published by the
00006 // Free Software Foundation.
00007 //
00008 // This library is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011 // General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this library; see the file COPYING.  If not, write to
00015 // the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016 // Boston, MA 02110-1301, USA.
00017 //
00018 // As a special exception, you may use this file as part of a free
00019 // software library without restriction.  Specifically, if other files
00020 // instantiate templates or use macros or inline functions from this
00021 // file, or you compile this file and link it with other files to
00022 // produce an executable, this file does not by itself cause the
00023 // resulting executable to be covered by the GNU General Public
00024 // License.  This exception does not however invalidate any other
00025 // reasons why the executable file might be covered by the GNU General
00026 // Public License.
00027 
00028 
00029 #ifndef OLENA_OLN_UTILS_BUFFER_HH
00030 # define OLENA_OLN_UTILS_BUFFER_HH
00031 
00032 # include <ntg/int.hh>
00033 # include <vector>
00034 
00035 namespace oln {
00036   namespace utils {
00040     class buffer
00041     {
00042     public:
00043       typedef ntg::int_u32              value_type; 
00044 
00048       buffer();
00049 
00056       template <class E>
00057       void add(const E &e, bool count = true);
00058 
00068       void push_back(bool bit, bool is_padding = false);
00069 
00073       ntg::int_u32 operator[] (unsigned n) const;
00074 
00078       void append_padding();
00079 
00083       void append_length();
00084 
00088       unsigned size() const;
00089 
00093       unsigned bit_len() const;
00094 
00098       bool is_append_padding() const;
00099 
00103       bool is_append_length() const;
00104 
00105     protected:
00111       value_type reorder(value_type x) const;
00112 
00113       static const unsigned             length_ = 100; 
00114 
00115       unsigned char                     current_bit_;
00116       std::vector<value_type>   data_; 
00117       value_type                        len1_; 
00118       value_type                        len2_; 
00119       bool                              padding_appended_; 
00120       bool                              length_appended_; 
00121     };
00122 
00123 # include <oln/utils/buffer.hxx>
00124 
00125   } // !utils
00126 } // !oln
00127 #endif // !OLENA_OLN_UTILS_BUFFER_HH

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