diff --git a/idx.h b/idx.h
index 18282f3..a70fd70 100644
--- a/idx.h
+++ b/idx.h
@@ -1,20 +1,52 @@
+/**
+    Copyright (C) powturbo 2013-2015
+    GPL v2 License
+  
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    - homepage : https://sites.google.com/site/powturbo/
+    - github   : https://github.com/powturbo
+    - twitter  : https://twitter.com/powturbo
+    - email    : powturbo [_AT_] gmail [_DOT_] com
+**/
+    
+//	    idx.h - "Integer Compression" header for idxcr/idxqry 
 #include <stdint.h>
 
-#define BLK_DIDNUM (128+1) //  // Block size 128 + 1 (1 stored in skips)
+#define BLK_DIDNUM (128+1) 	//  Block size 128 + 1 (1 stored in skips)
 
+							//				compressed size for 62 GB clueweb09.sorted
+   					   		// Defaut is bitpackv/bitunpackv    18 GB
+//#define _TURBOPFOR     	// for compact version     			12 GB  
 
-// Compression method. Set only one METHOD!      			
-							//							compressed size for 62 GB clueweb09.sorted
-   					   		// Defaut is bitpack/bitunpack      18 GB
-#define USE_SIMDPACK        // SIMD Bitpacking         			18 GB  
-//#define USE_TURBOPFOR     // for compact version     			12 GB  
-//#define USE_TURBOPACKD
+  #ifdef _TURBOPFOR
+#define SKIP_S 6 
+#define SKIP_SIZE 2  		// no implicit skip
+  #else
+//#define SKIP_S 5
+#define SKIP_SIZE 2  	    // no implicit skips 
+//#define SKIP_SIZE 1  	    //    implicit skips
+  #endif
+#define SKIP_M ((1<<SKIP_S)-1)
 
+  #ifdef _WIN32
+#define __off64_t _off64_t  
+  #endif
 //-------------------------- Mapping term id <-> posting offset in file ----------------------------------
 typedef struct { uint8_t offseth; uint32_t offsetl; } __attribute__ ((packed)) tmap_t;   // 40 bits offsets -> 1 Terabyte
 
 #define TIDMAPSET(__t, __ofs) { (__t)->offseth = (__ofs)>>32; (__t)->offsetl = (__ofs) & 0xffffffff; }
 #define TIDMAPGET(__t) ((__off64_t)(__t)->offseth << 32 | (__t)->offsetl)
 #define TIDMAP(__fdm, __tid) ({ char *_bp = __fdm; tmap_t *_t = (tmap_t *)&_bp[(__tid)*sizeof(tmap_t)]; TIDMAPGET(_t); })
-//--------------------------------------------------------------------------------------------------------
-