Ajout de la bibli SFML (A)

code/SFML-2.4.2/include/SFML/System/InputStream.hpp

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+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2017 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_INPUTSTREAM_HPP
+#define SFML_INPUTSTREAM_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Config.hpp>
+#include <SFML/System/Export.hpp>
+
+
+namespace sf
+{
+////////////////////////////////////////////////////////////
+/// \brief Abstract class for custom file input streams
+///
+////////////////////////////////////////////////////////////
+class SFML_SYSTEM_API InputStream
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Virtual destructor
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual ~InputStream() {}
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Read data from the stream
+    ///
+    /// After reading, the stream's reading position must be
+    /// advanced by the amount of bytes read.
+    ///
+    /// \param data Buffer where to copy the read data
+    /// \param size Desired number of bytes to read
+    ///
+    /// \return The number of bytes actually read, or -1 on error
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 read(void* data, Int64 size) = 0;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Change the current reading position
+    ///
+    /// \param position The position to seek to, from the beginning
+    ///
+    /// \return The position actually sought to, or -1 on error
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 seek(Int64 position) = 0;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current reading position in the stream
+    ///
+    /// \return The current position, or -1 on error.
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 tell() = 0;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Return the size of the stream
+    ///
+    /// \return The total number of bytes available in the stream, or -1 on error
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 getSize() = 0;
+};
+
+} // namespace sf
+
+
+#endif // SFML_INPUTSTREAM_HPP
+
+
+////////////////////////////////////////////////////////////
+/// \class sf::InputStream
+/// \ingroup system
+///
+/// This class allows users to define their own file input sources
+/// from which SFML can load resources.
+///
+/// SFML resource classes like sf::Texture and
+/// sf::SoundBuffer provide loadFromFile and loadFromMemory functions,
+/// which read data from conventional sources. However, if you
+/// have data coming from a different source (over a network,
+/// embedded, encrypted, compressed, etc) you can derive your
+/// own class from sf::InputStream and load SFML resources with
+/// their loadFromStream function.
+///
+/// Usage example:
+/// \code
+/// // custom stream class that reads from inside a zip file
+/// class ZipStream : public sf::InputStream
+/// {
+/// public:
+///
+///     ZipStream(std::string archive);
+///
+///     bool open(std::string filename);
+///
+///     Int64 read(void* data, Int64 size);
+///
+///     Int64 seek(Int64 position);
+///
+///     Int64 tell();
+///
+///     Int64 getSize();
+///
+/// private:
+///
+///     ...
+/// };
+///
+/// // now you can load textures...
+/// sf::Texture texture;
+/// ZipStream stream("resources.zip");
+/// stream.open("images/img.png");
+/// texture.loadFromStream(stream);
+///
+/// // musics...
+/// sf::Music music;
+/// ZipStream stream("resources.zip");
+/// stream.open("musics/msc.ogg");
+/// music.openFromStream(stream);
+///
+/// // etc.
+/// \endcode
+///
+////////////////////////////////////////////////////////////