Ajout de la bibli SFML (A)

code/SFML-2.4.2/include/SFML/System/MemoryInputStream.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_MEMORYINPUTSTREAM_HPP
+#define SFML_MEMORYINPUTSTREAM_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Config.hpp>
+#include <SFML/System/InputStream.hpp>
+#include <SFML/System/Export.hpp>
+#include <cstdlib>
+
+
+namespace sf
+{
+////////////////////////////////////////////////////////////
+/// \brief Implementation of input stream based on a memory chunk
+///
+////////////////////////////////////////////////////////////
+class SFML_SYSTEM_API MemoryInputStream : public InputStream
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Default constructor
+    ///
+    ////////////////////////////////////////////////////////////
+    MemoryInputStream();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Open the stream from its data
+    ///
+    /// \param data        Pointer to the data in memory
+    /// \param sizeInBytes Size of the data, in bytes
+    ///
+    ////////////////////////////////////////////////////////////
+    void open(const void* data, std::size_t sizeInBytes);
+
+    ////////////////////////////////////////////////////////////
+    /// \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);
+
+    ////////////////////////////////////////////////////////////
+    /// \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);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current reading position in the stream
+    ///
+    /// \return The current position, or -1 on error.
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 tell();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Return the size of the stream
+    ///
+    /// \return The total number of bytes available in the stream, or -1 on error
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Int64 getSize();
+
+private:
+
+    ////////////////////////////////////////////////////////////
+    // Member data
+    ////////////////////////////////////////////////////////////
+    const char* m_data;   ///< Pointer to the data in memory
+    Int64       m_size;   ///< Total size of the data
+    Int64       m_offset; ///< Current reading position
+};
+
+} // namespace sf
+
+
+#endif // SFML_MEMORYINPUTSTREAM_HPP
+
+
+////////////////////////////////////////////////////////////
+/// \class sf::MemoryInputStream
+/// \ingroup system
+///
+/// This class is a specialization of InputStream that
+/// reads from data in memory.
+///
+/// It wraps a memory chunk in the common InputStream interface
+/// and therefore allows to use generic classes or functions
+/// that accept such a stream, with content already loaded in memory.
+///
+/// In addition to the virtual functions inherited from
+/// InputStream, MemoryInputStream adds a function to
+/// specify the pointer and size of the data in memory.
+///
+/// SFML resource classes can usually be loaded directly from
+/// memory, so this class shouldn't be useful to you unless
+/// you create your own algorithms that operate on an InputStream.
+///
+/// Usage example:
+/// \code
+/// void process(InputStream& stream);
+///
+/// MemoryInputStream stream;
+/// stream.open(thePtr, theSize);
+/// process(stream);
+/// \endcode
+///
+/// InputStream, FileInputStream
+///
+////////////////////////////////////////////////////////////