mirror of
https://github.com/xiaoyifang/goldendict-ng.git
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89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
/*
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* Copyright (C) 2018 Matthieu Gautier <mgautier@kymeria.fr>
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* Copyright (C) 2009 Tommi Maekitalo
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
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* NON-INFRINGEMENT. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef ZIM_BLOB_H
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#define ZIM_BLOB_H
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#include "zim.h"
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#include <iostream>
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#include <string>
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#include <algorithm>
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#include <memory>
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namespace zim
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{
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/**
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* A blob is a pointer to data, potentially stored in an `Archive`.
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*
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* All `Blob`'s methods are threadsafe.
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*/
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class LIBZIM_API Blob
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{
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public: // types
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using DataPtr = std::shared_ptr<const char>;
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public: // functions
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/**
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* Constuct a empty `Blob`
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*/
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Blob();
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/**
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* Constuct `Blob` pointing to `data`.
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*
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* The created blob only point to the data and doesn't own it.
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* User must care that data is not freed before using the blob.
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*/
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Blob(const char* data, size_type size);
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/**
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* Constuct `Blob` pointing to `data`.
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*
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* The created blob shares the ownership on data.
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*/
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Blob(const DataPtr& buffer, size_type size);
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operator std::string() const { return std::string(_data.get(), _size); }
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const char* data() const { return _data.get(); }
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const char* end() const { return _data.get() + _size; }
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size_type size() const { return _size; }
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private:
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DataPtr _data;
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size_type _size;
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};
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inline std::ostream& operator<< (std::ostream& out, const Blob& blob)
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{
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if (blob.data())
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out.write(blob.data(), blob.size());
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return out;
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}
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inline bool operator== (const Blob& b1, const Blob& b2)
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{
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return b1.size() == b2.size()
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&& std::equal(b1.data(), b1.data() + b1.size(), b2.data());
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}
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}
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#endif // ZIM_BLOB_H
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