1 files changed, 101 insertions, 0 deletions
diff --git a/src/SFML/System/MemoryInputStream.cpp b/src/SFML/System/MemoryInputStream.cpp
new file mode 100644
index 0000000..6c2d547
--- /dev/null
+++ b/src/SFML/System/MemoryInputStream.cpp
@@ -0,0 +1,101 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2015 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.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/System/MemoryInputStream.hpp>
+#include <cstring>
+
+
+namespace sf
+{
+////////////////////////////////////////////////////////////
+MemoryInputStream::MemoryInputStream() :
+m_data  (NULL),
+m_size  (0),
+m_offset(0)
+{
+}
+
+
+////////////////////////////////////////////////////////////
+void MemoryInputStream::open(const void* data, std::size_t sizeInBytes)
+{
+    m_data = static_cast<const char*>(data);
+    m_size = sizeInBytes;
+    m_offset = 0;
+}
+
+
+////////////////////////////////////////////////////////////
+Int64 MemoryInputStream::read(void* data, Int64 size)
+{
+    if (!m_data)
+        return -1;
+
+    Int64 endPosition = m_offset + size;
+    Int64 count = endPosition <= m_size ? size : m_size - m_offset;
+
+    if (count > 0)
+    {
+        std::memcpy(data, m_data + m_offset, static_cast<std::size_t>(count));
+        m_offset += count;
+    }
+
+    return count;
+}
+
+
+////////////////////////////////////////////////////////////
+Int64 MemoryInputStream::seek(Int64 position)
+{
+    if (!m_data)
+        return -1;
+
+    m_offset = position < m_size ? position : m_size;
+    return m_offset;
+}
+
+
+////////////////////////////////////////////////////////////
+Int64 MemoryInputStream::tell()
+{
+    if (!m_data)
+        return -1;
+
+    return m_offset;
+}
+
+
+////////////////////////////////////////////////////////////
+Int64 MemoryInputStream::getSize()
+{
+    if (!m_data)
+        return -1;
+
+    return m_size;
+}
+
+} // namespace sf