From 7028cbe09c688437910a25623098762bf0fa592d Mon Sep 17 00:00:00 2001
From: David Walter Seikel
Date: Mon, 28 Mar 2016 22:28:34 +1000
Subject: Move Irrlicht to src/others.

---
 .../source/Irrlicht/CLimitReadFile.cpp             | 127 +++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 src/others/irrlicht-1.8.1/source/Irrlicht/CLimitReadFile.cpp

(limited to 'src/others/irrlicht-1.8.1/source/Irrlicht/CLimitReadFile.cpp')

diff --git a/src/others/irrlicht-1.8.1/source/Irrlicht/CLimitReadFile.cpp b/src/others/irrlicht-1.8.1/source/Irrlicht/CLimitReadFile.cpp
new file mode 100644
index 0000000..51afaad
--- /dev/null
+++ b/src/others/irrlicht-1.8.1/source/Irrlicht/CLimitReadFile.cpp
@@ -0,0 +1,127 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#include "CLimitReadFile.h"
+#include "irrString.h"
+
+namespace irr
+{
+namespace io
+{
+
+
+CLimitReadFile::CLimitReadFile(IReadFile* alreadyOpenedFile, long pos,
+		long areaSize, const io::path& name)
+	: Filename(name), AreaStart(0), AreaEnd(0), Pos(0),
+	File(alreadyOpenedFile)
+{
+	#ifdef _DEBUG
+	setDebugName("CLimitReadFile");
+	#endif
+
+	if (File)
+	{
+		File->grab();
+		AreaStart = pos;
+		AreaEnd = AreaStart + areaSize;
+	}
+}
+
+
+CLimitReadFile::~CLimitReadFile()
+{
+	if (File)
+		File->drop();
+}
+
+
+//! returns how much was read
+s32 CLimitReadFile::read(void* buffer, u32 sizeToRead)
+{
+#if 1
+	if (0 == File)
+		return 0;
+
+	s32 r = AreaStart + Pos;
+	s32 toRead = core::s32_min(AreaEnd, r + sizeToRead) - core::s32_max(AreaStart, r);
+	if (toRead < 0)
+		return 0;
+	File->seek(r);
+	r = File->read(buffer, toRead);
+	Pos += r;
+	return r;
+#else
+	const long pos = File->getPos();
+
+	if (pos >= AreaEnd)
+		return 0;
+
+	if (pos + (long)sizeToRead >= AreaEnd)
+		sizeToRead = AreaEnd - pos;
+
+	return File->read(buffer, sizeToRead);
+#endif
+}
+
+
+//! changes position in file, returns true if successful
+bool CLimitReadFile::seek(long finalPos, bool relativeMovement)
+{
+#if 1
+	Pos = core::s32_clamp(finalPos + (relativeMovement ? Pos : 0 ), 0, AreaEnd - AreaStart);
+	return true;
+#else
+	const long pos = File->getPos();
+
+	if (relativeMovement)
+	{
+		if (pos + finalPos > AreaEnd)
+			finalPos = AreaEnd - pos;
+	}
+	else
+	{
+		finalPos += AreaStart;
+		if (finalPos > AreaEnd)
+			return false;
+	}
+
+	return File->seek(finalPos, relativeMovement);
+#endif
+}
+
+
+//! returns size of file
+long CLimitReadFile::getSize() const
+{
+	return AreaEnd - AreaStart;
+}
+
+
+//! returns where in the file we are.
+long CLimitReadFile::getPos() const
+{
+#if 1
+	return Pos;
+#else
+	return File->getPos() - AreaStart;
+#endif
+}
+
+
+//! returns name of file
+const io::path& CLimitReadFile::getFileName() const
+{
+	return Filename;
+}
+
+
+IReadFile* createLimitReadFile(const io::path& fileName, IReadFile* alreadyOpenedFile, long pos, long areaSize)
+{
+	return new CLimitReadFile(alreadyOpenedFile, pos, areaSize, fileName);
+}
+
+
+} // end namespace io
+} // end namespace irr
+
-- 
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