Merging r5975 through r6036 from trunk to ogl-es branch.

GLES drivers adapted, but only did make compile-tests.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CReadFile.cpp

@@ -0,0 +1,113 @@
+// 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 "CReadFile.h"
+
+namespace irr
+{
+namespace io
+{
+
+
+CReadFile::CReadFile(const io::path& fileName)
+: File(0), FileSize(0), Filename(fileName)
+{
+	#ifdef _DEBUG
+	setDebugName("CReadFile");
+	#endif
+
+	openFile();
+}
+
+
+CReadFile::~CReadFile()
+{
+	if (File)
+		fclose(File);
+}
+
+
+//! returns how much was read
+size_t CReadFile::read(void* buffer, size_t sizeToRead)
+{
+	if (!isOpen())
+		return 0;
+
+	return fread(buffer, 1, sizeToRead, File);
+}
+
+
+//! changes position in file, returns true if successful
+//! if relativeMovement==true, the pos is changed relative to current pos,
+//! otherwise from begin of file
+bool CReadFile::seek(long finalPos, bool relativeMovement)
+{
+	if (!isOpen())
+		return false;
+
+	return fseek(File, finalPos, relativeMovement ? SEEK_CUR : SEEK_SET) == 0;
+}
+
+
+//! returns size of file
+long CReadFile::getSize() const
+{
+	return FileSize;
+}
+
+
+//! returns where in the file we are.
+long CReadFile::getPos() const
+{
+	return ftell(File);
+}
+
+
+//! opens the file
+void CReadFile::openFile()
+{
+	if (Filename.size() == 0) // bugfix posted by rt
+	{
+		File = 0;
+		return;
+	}
+
+#if defined ( _IRR_WCHAR_FILESYSTEM )
+	File = _wfopen(Filename.c_str(), L"rb");
+#else
+	File = fopen(Filename.c_str(), "rb");
+#endif
+
+	if (File)
+	{
+		// get FileSize
+
+		fseek(File, 0, SEEK_END);
+		FileSize = getPos();
+		fseek(File, 0, SEEK_SET);
+	}
+}
+
+
+//! returns name of file
+const io::path& CReadFile::getFileName() const
+{
+	return Filename;
+}
+
+
+IReadFile* CReadFile::createReadFile(const io::path& fileName)
+{
+	CReadFile* file = new CReadFile(fileName);
+	if (file->isOpen())
+		return file;
+
+	file->drop();
+	return 0;
+}
+
+
+} // end namespace io
+} // end namespace irr
+