diff --git a/common/jpeg/rrutil.h b/common/jpeg/rrutil.h
new file mode 100644
index 0000000..4918120
--- /dev/null
+++ b/common/jpeg/rrutil.h
@@ -0,0 +1,81 @@
+/* Copyright (C)2004 Landmark Graphics Corporation
+ * Copyright (C)2005 Sun Microsystems, Inc.
+ *
+ * This library is free software and may be redistributed and/or modified under
+ * the terms of the wxWindows Library License, Version 3.1 or (at your option)
+ * any later version.  The full license is in the LICENSE.txt file included
+ * with this distribution.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * wxWindows Library License for more details.
+ */
+
+#ifndef __RRUTIL_H__
+#define __RRUTIL_H__
+
+#ifdef _WIN32
+	#include <windows.h>
+	#define sleep(t) Sleep((t)*1000)
+	#define usleep(t) Sleep((t)/1000)
+#else
+	#include <unistd.h>
+	#define stricmp strcasecmp
+	#define strnicmp strncasecmp
+#endif
+
+#ifndef min
+ #define min(a,b) ((a)<(b)?(a):(b))
+#endif
+
+#ifndef max
+ #define max(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#define pow2(i) (1<<(i))
+#define isPow2(x) (((x)&(x-1))==0)
+
+#ifdef sgi
+#define _SC_NPROCESSORS_CONF _SC_NPROC_CONF
+#endif
+
+#ifdef sun
+#define __inline inline
+#endif
+
+static __inline int numprocs(void)
+{
+	#ifdef _WIN32
+	DWORD ProcAff, SysAff, i;  int count=0;
+	if(!GetProcessAffinityMask(GetCurrentProcess(), &ProcAff, &SysAff)) return(1);
+	for(i=0; i<32; i++) if(ProcAff&(1<<i)) count++;
+	return(count);
+	#elif defined (__APPLE__)
+	return(1);
+	#else
+	long count=1;
+	if((count=sysconf(_SC_NPROCESSORS_CONF))!=-1) return((int)count);
+	else return(1);
+	#endif
+}
+
+#define byteswap(i) ( \
+	(((i) & 0xff000000) >> 24) | \
+	(((i) & 0x00ff0000) >>  8) | \
+	(((i) & 0x0000ff00) <<  8) | \
+	(((i) & 0x000000ff) << 24) )
+
+#define byteswap16(i) ( \
+	(((i) & 0xff00) >> 8) | \
+	(((i) & 0x00ff) << 8) )
+
+static __inline int littleendian(void)
+{
+	unsigned int value=1;
+	unsigned char *ptr=(unsigned char *)(&value);
+	if(ptr[0]==1 && ptr[3]==0) return 1;
+	else return 0;
+}
+
+#endif