merge cuyler's PR

include/JSystem/JSupport/JSUFileInputStream.h

@@ -0,0 +1,27 @@
+#ifndef JSUFILEINPUTSTREAM_H
+#define JSUFILEINPUTSTREAM_H
+
+#include "types.h"
+#include "JSystem/JKernel/JKRFile.h"
+#include "JSystem/JSupport/JSURandomInputStream.h"
+
+class JSUFileInputStream : public JSURandomInputStream {
+public:
+  JSUFileInputStream(JKRFile* file);
+
+  virtual ~JSUFileInputStream() { }
+  virtual int readData(void* buf, s32 len);
+  virtual int getLength() const { return ((JKRFile*)this->mObject)->getFileSize(); }
+  virtual int getPosition() const { return this->mPosition; }
+  virtual int seekPos(s32 offset, JSUStreamSeekFrom from);
+
+  /* These two functions are shown in the symbol map, but are unused. */
+  // bool open(const char* path);
+  // bool close();
+  
+protected:
+  const void* mObject;
+  s32 mPosition;
+};
+
+#endif