diff --git a/eliasfano.h b/eliasfano.h
new file mode 100644
index 0000000..5a730d4
--- /dev/null
+++ b/eliasfano.h
@@ -0,0 +1,44 @@
+/**
+    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
+**/
+//     eliasfano.h - "Integer Compression" Elias Fano c/c++ header
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// compress/decompress integer array with n values to the buffer out. Return value = end of output/input buffer
+unsigned char *efanoenc32(  unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efanodec32(  unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efano1enc32( unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efano1dec32( unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efanoencv32( unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efanodecv32( unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efano1encv32(unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efano1decv32(unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+#ifdef __cplusplus
+}
+#endif