diff --git a/include_/eliasfano.h b/include_/eliasfano.h
new file mode 100644
index 0000000..65c3623
--- /dev/null
+++ b/include_/eliasfano.h
@@ -0,0 +1,34 @@
+//--  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 *efanoenc64(     uint64_t      *__restrict in, unsigned n, unsigned char  *__restrict out, uint64_t start);
+
+unsigned char *efanodec32(     unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+unsigned char *efanodec64(     unsigned char *__restrict in, unsigned n, uint64_t       *__restrict out, uint64_t start);
+
+unsigned char *efano1enc32(    unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efano1enc64(    uint64_t      *__restrict in, unsigned n, unsigned char  *__restrict out, uint64_t start);
+
+unsigned char *efano1dec32(    unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+unsigned char *efano1dec64(    unsigned char *__restrict in, unsigned n, uint64_t       *__restrict out, uint64_t start);
+
+unsigned char *efanoenc128v32( unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efanodec128v32( unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efano1enc128v32(unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efano1dec128v32(unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efanoenc256v32( unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efanodec256v32( unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+unsigned char *efano1enc256v32(unsigned      *__restrict in, unsigned n, unsigned char  *__restrict out, unsigned start);
+unsigned char *efano1dec256v32(unsigned char *__restrict in, unsigned n, unsigned       *__restrict out, unsigned start);
+
+#ifdef __cplusplus
+}
+#endif
+